18abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)/* 28abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * Copyright (C) 2013 Google Inc. All rights reserved. 38abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * 48abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 58abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * modification, are permitted provided that the following conditions are 68abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * met: 78abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * 88abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * * Redistributions of source code must retain the above copyright 98abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 108abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * * Redistributions in binary form must reproduce the above 118abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 128abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * in the documentation and/or other materials provided with the 138abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * distribution. 148abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 158abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * contributors may be used to endorse or promote products derived from 168abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * this software without specific prior written permission. 178abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * 188abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 198abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 208abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 218abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 228abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 238abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 248abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 258abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 268abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 278abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 288abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 298abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) */ 308abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 318abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)#include "config.h" 328abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)#include "core/rendering/RenderBlockFlow.h" 338abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 3409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "core/accessibility/AXObjectCache.h" 351e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "core/frame/FrameView.h" 367242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci#include "core/frame/LocalFrame.h" 377242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci#include "core/frame/Settings.h" 387242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci#include "core/html/HTMLDialogElement.h" 397242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci#include "core/paint/BlockFlowPainter.h" 40f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)#include "core/rendering/HitTestLocation.h" 4109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "core/rendering/RenderFlowThread.h" 428abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)#include "core/rendering/RenderLayer.h" 43d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#include "core/rendering/RenderMultiColumnFlowThread.h" 44197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch#include "core/rendering/RenderPagedFlowThread.h" 4519cde67944066db31e633d9e386f2aa9bf9fadb3Torne (Richard Coles)#include "core/rendering/RenderText.h" 468abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)#include "core/rendering/RenderView.h" 47c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)#include "core/rendering/TextAutosizer.h" 4809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "core/rendering/line/LineWidth.h" 4919cde67944066db31e633d9e386f2aa9bf9fadb3Torne (Richard Coles)#include "core/rendering/svg/SVGTextRunRenderingContext.h" 5009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "platform/text/BidiTextRun.h" 518abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 52c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 538abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 54f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)bool RenderBlockFlow::s_canPropagateFloatIntoSibling = false; 55f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)struct SameSizeAsMarginInfo { 579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) uint16_t bitfields; 589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit margins[2]; 599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)}; 609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)COMPILE_ASSERT(sizeof(RenderBlockFlow::MarginValues) == sizeof(LayoutUnit[4]), MarginValues_should_stay_small); 629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)class MarginInfo { 649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Collapsing flags for whether we can collapse our margins with our children's margins. 659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_canCollapseWithChildren : 1; 669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_canCollapseMarginBeforeWithChildren : 1; 679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_canCollapseMarginAfterWithChildren : 1; 6809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool m_canCollapseMarginAfterWithLastChild: 1; 699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Whether or not we are a quirky container, i.e., do we collapse away top and bottom 719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // margins in our container. Table cells and the body are the common examples. We 729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // also have a custom style property for Safari RSS to deal with TypePad blog articles. 739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_quirkContainer : 1; 749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This flag tracks whether we are still looking at child margins that can all collapse together at the beginning of a block. 769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // They may or may not collapse with the top margin of the block (|m_canCollapseTopWithChildren| tells us that), but they will 779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // always be collapsing with one another. This variable can remain set to true through multiple iterations 789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // as long as we keep encountering self-collapsing blocks. 799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_atBeforeSideOfBlock : 1; 809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This flag is set when we know we're examining bottom margins and we know we're at the bottom of the block. 829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_atAfterSideOfBlock : 1; 839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // These variables are used to detect quirky margins that we need to collapse away (in table cells 859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // and in the body element). 869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_hasMarginBeforeQuirk : 1; 879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_hasMarginAfterQuirk : 1; 889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_determinedMarginBeforeQuirk : 1; 899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool m_discardMargin : 1; 919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // These flags track the previous maximal positive and negative margins. 939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit m_positiveMargin; 949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit m_negativeMargin; 959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)public: 979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) MarginInfo(RenderBlockFlow*, LayoutUnit beforeBorderPadding, LayoutUnit afterBorderPadding); 989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setAtBeforeSideOfBlock(bool b) { m_atBeforeSideOfBlock = b; } 1009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setAtAfterSideOfBlock(bool b) { m_atAfterSideOfBlock = b; } 1019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void clearMargin() 1029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) { 1039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_positiveMargin = 0; 1049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_negativeMargin = 0; 1059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 1069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setHasMarginBeforeQuirk(bool b) { m_hasMarginBeforeQuirk = b; } 1079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setHasMarginAfterQuirk(bool b) { m_hasMarginAfterQuirk = b; } 1089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setDeterminedMarginBeforeQuirk(bool b) { m_determinedMarginBeforeQuirk = b; } 1099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setPositiveMargin(LayoutUnit p) { ASSERT(!m_discardMargin); m_positiveMargin = p; } 1109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setNegativeMargin(LayoutUnit n) { ASSERT(!m_discardMargin); m_negativeMargin = n; } 1119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setPositiveMarginIfLarger(LayoutUnit p) 1129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) { 1139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!m_discardMargin); 1149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (p > m_positiveMargin) 1159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_positiveMargin = p; 1169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 1179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setNegativeMarginIfLarger(LayoutUnit n) 1189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) { 1199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!m_discardMargin); 1209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (n > m_negativeMargin) 1219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_negativeMargin = n; 1229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 1239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setMargin(LayoutUnit p, LayoutUnit n) { ASSERT(!m_discardMargin); m_positiveMargin = p; m_negativeMargin = n; } 1259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setCanCollapseMarginAfterWithChildren(bool collapse) { m_canCollapseMarginAfterWithChildren = collapse; } 12609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) void setCanCollapseMarginAfterWithLastChild(bool collapse) { m_canCollapseMarginAfterWithLastChild = collapse; } 1279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) void setDiscardMargin(bool value) { m_discardMargin = value; } 1289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool atBeforeSideOfBlock() const { return m_atBeforeSideOfBlock; } 1309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool canCollapseWithMarginBefore() const { return m_atBeforeSideOfBlock && m_canCollapseMarginBeforeWithChildren; } 1319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool canCollapseWithMarginAfter() const { return m_atAfterSideOfBlock && m_canCollapseMarginAfterWithChildren; } 1329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool canCollapseMarginBeforeWithChildren() const { return m_canCollapseMarginBeforeWithChildren; } 1339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool canCollapseMarginAfterWithChildren() const { return m_canCollapseMarginAfterWithChildren; } 13409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool canCollapseMarginAfterWithLastChild() const { return m_canCollapseMarginAfterWithLastChild; } 1359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool quirkContainer() const { return m_quirkContainer; } 1369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool determinedMarginBeforeQuirk() const { return m_determinedMarginBeforeQuirk; } 1379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool hasMarginBeforeQuirk() const { return m_hasMarginBeforeQuirk; } 1389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool hasMarginAfterQuirk() const { return m_hasMarginAfterQuirk; } 1399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit positiveMargin() const { return m_positiveMargin; } 1409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit negativeMargin() const { return m_negativeMargin; } 1419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool discardMargin() const { return m_discardMargin; } 1429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit margin() const { return m_positiveMargin - m_negativeMargin; } 1439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)}; 1449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)static bool inNormalFlow(RenderBox* child) 1459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 1469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBlock* curr = child->containingBlock(); 1479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderView* renderView = child->view(); 1489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) while (curr && curr != renderView) { 1499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (curr->hasColumns() || curr->isRenderFlowThread()) 1509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return true; 1519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (curr->isFloatingOrOutOfFlowPositioned()) 1529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return false; 1539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) curr = curr->containingBlock(); 1549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 1559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return true; 1569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 1579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 158e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles)void RenderBlockFlow::RenderBlockFlowRareData::trace(Visitor* visitor) 159e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles){ 160e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) visitor->trace(m_multiColumnFlowThread); 161e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles)} 162e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) 1638abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)RenderBlockFlow::RenderBlockFlow(ContainerNode* node) 1648abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) : RenderBlock(node) 1658abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles){ 1669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) COMPILE_ASSERT(sizeof(MarginInfo) == sizeof(SameSizeAsMarginInfo), MarginInfo_should_stay_small); 167197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setChildrenInline(true); 1688abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)} 1698abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 1708abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)RenderBlockFlow::~RenderBlockFlow() 1718abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles){ 1728abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)} 1738abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 174e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles)void RenderBlockFlow::trace(Visitor* visitor) 175e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles){ 176e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) visitor->trace(m_rareData); 177e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) RenderBlock::trace(visitor); 178e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles)} 179e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) 180a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)RenderBlockFlow* RenderBlockFlow::createAnonymous(Document* document) 181a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles){ 182a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) RenderBlockFlow* renderer = new RenderBlockFlow(0); 183a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) renderer->setDocumentForAnonymous(document); 184a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) return renderer; 185a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)} 186a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 187d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)RenderObject* RenderBlockFlow::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope& layoutScope) 188d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 189d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread(); 190d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (!flowThread) 191d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return 0; 192d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) setLogicalTopForChild(flowThread, borderBefore() + paddingBefore()); 193d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) flowThread->layoutColumns(relayoutChildren, layoutScope); 194d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) determineLogicalLeftPositionForChild(flowThread); 195d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return flowThread; 196d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 197d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 198d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)bool RenderBlockFlow::updateLogicalWidthAndColumnWidth() 199d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 200d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) bool relayoutChildren = RenderBlock::updateLogicalWidthAndColumnWidth(); 201d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread()) { 202d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (flowThread->needsNewWidth()) 203d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return true; 204d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 205d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return relayoutChildren; 206d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 207d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 20809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)void RenderBlockFlow::checkForPaginationLogicalHeightChange(LayoutUnit& pageLogicalHeight, bool& pageLogicalHeightChanged, bool& hasSpecifiedPageLogicalHeight) 20951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 210d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread()) { 21110f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch LogicalExtentComputedValues computedValues; 21210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch computeLogicalHeight(LayoutUnit(), logicalTop(), computedValues); 21310f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch LayoutUnit columnHeight = computedValues.m_extent - borderAndPaddingLogicalHeight() - scrollbarLogicalHeight(); 21410f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch pageLogicalHeightChanged = columnHeight != flowThread->columnHeightAvailable(); 21510f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch flowThread->setColumnHeightAvailable(std::max<LayoutUnit>(columnHeight, 0)); 216d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } else if (hasColumns()) { 217d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ColumnInfo* colInfo = columnInfo(); 218d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 21909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!pageLogicalHeight) { 22009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit oldLogicalHeight = logicalHeight(); 22109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setLogicalHeight(0); 22209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // We need to go ahead and set our explicit page height if one exists, so that we can 22309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // avoid doing two layout passes. 22409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) updateLogicalHeight(); 22509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit columnHeight = contentLogicalHeight(); 22609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (columnHeight > 0) { 22709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) pageLogicalHeight = columnHeight; 22809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) hasSpecifiedPageLogicalHeight = true; 22909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 23009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setLogicalHeight(oldLogicalHeight); 23109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 23209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (colInfo->columnHeight() != pageLogicalHeight && everHadLayout()) { 23309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) colInfo->setColumnHeight(pageLogicalHeight); 23409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) pageLogicalHeightChanged = true; 23509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 23651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 23709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!hasSpecifiedPageLogicalHeight && !pageLogicalHeight) 23809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) colInfo->clearForcedBreaks(); 23909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else if (isRenderFlowThread()) { 24007a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch RenderFlowThread* flowThread = toRenderFlowThread(this); 24107a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 24207a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // FIXME: This is a hack to always make sure we have a page logical height, if said height 24307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // is known. The page logical height thing in LayoutState is meaningless for flow 24407a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // thread-based pagination (page height isn't necessarily uniform throughout the flow 24507a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // thread), but as long as it is used universally as a means to determine whether page 24607a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // height is known or not, we need this. Page height is unknown when column balancing is 24707a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // enabled and flow thread height is still unknown (i.e. during the first layout pass). When 24807a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // it's unknown, we need to prevent the pagination code from assuming page breaks everywhere 24907a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // and thereby eating every top margin. It should be trivial to clean up and get rid of this 25007a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // hack once the old multicol implementation is gone. 25107a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch pageLogicalHeight = flowThread->isPageLogicalHeightKnown() ? LayoutUnit(1) : LayoutUnit(0); 25207a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 25307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch pageLogicalHeightChanged = flowThread->pageLogicalSizeChanged(); 25409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 25551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 25651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 25709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)bool RenderBlockFlow::shouldRelayoutForPagination(LayoutUnit& pageLogicalHeight, LayoutUnit layoutOverflowLogicalBottom) const 258a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles){ 259a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // FIXME: We don't balance properly at all in the presence of forced page breaks. We need to understand what 260a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // the distance between forced page breaks is so that we can avoid making the minimum column height too tall. 261a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) ColumnInfo* colInfo = columnInfo(); 26209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit columnHeight = pageLogicalHeight; 26309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) const int minColumnCount = colInfo->forcedBreaks() + 1; 26409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) const int desiredColumnCount = colInfo->desiredColumnCount(); 26509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (minColumnCount >= desiredColumnCount) { 26609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // The forced page breaks are in control of the balancing. Just set the column height to the 26709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // maximum page break distance. 26809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!pageLogicalHeight) { 269197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit distanceBetweenBreaks = std::max<LayoutUnit>(colInfo->maximumDistanceBetweenForcedBreaks(), 270d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) view()->layoutState()->pageLogicalOffset(*this, borderBefore() + paddingBefore() + layoutOverflowLogicalBottom) - colInfo->forcedBreakOffset()); 271197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch columnHeight = std::max(colInfo->minimumColumnHeight(), distanceBetweenBreaks); 272a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 27309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else if (layoutOverflowLogicalBottom > boundedMultiply(pageLogicalHeight, desiredColumnCount)) { 27409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // Now that we know the intrinsic height of the columns, we have to rebalance them. 275197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch columnHeight = std::max<LayoutUnit>(colInfo->minimumColumnHeight(), ceilf(layoutOverflowLogicalBottom.toFloat() / desiredColumnCount)); 27609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 277a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 27809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (columnHeight && columnHeight != pageLogicalHeight) { 27909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) pageLogicalHeight = columnHeight; 28009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return true; 281a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 282a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 28309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return false; 28409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 28509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 28609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)void RenderBlockFlow::setColumnCountAndHeight(unsigned count, LayoutUnit pageLogicalHeight) 28709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 28809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ColumnInfo* colInfo = columnInfo(); 289a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (pageLogicalHeight) 29009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) colInfo->setColumnCountAndHeight(count, pageLogicalHeight); 291a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 292a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (columnCount(colInfo)) { 293a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) setLogicalHeight(borderBefore() + paddingBefore() + colInfo->columnHeight() + borderAfter() + paddingAfter() + scrollbarLogicalHeight()); 294a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) m_overflow.clear(); 295a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 29609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 297a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 298c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)void RenderBlockFlow::setBreakAtLineToAvoidWidow(int lineToBreak) 299c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 300c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ASSERT(lineToBreak >= 0); 301c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ensureRareData(); 302c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ASSERT(!m_rareData->m_didBreakAtLineToAvoidWidow); 303c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) m_rareData->m_lineBreakToAvoidWidow = lineToBreak; 304c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 305c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 306c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)void RenderBlockFlow::setDidBreakAtLineToAvoidWidow() 307c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 308c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ASSERT(!shouldBreakAtLineToAvoidWidow()); 309c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 310c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // This function should be called only after a break was applied to avoid widows 311c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // so assert |m_rareData| exists. 312c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ASSERT(m_rareData); 313c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 314c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) m_rareData->m_didBreakAtLineToAvoidWidow = true; 315c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 316c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 317c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)void RenderBlockFlow::clearDidBreakAtLineToAvoidWidow() 318c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 319c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!m_rareData) 320c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return; 321c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 322c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) m_rareData->m_didBreakAtLineToAvoidWidow = false; 323c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 324c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 325c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)void RenderBlockFlow::clearShouldBreakAtLineToAvoidWidow() const 326c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 327c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) ASSERT(shouldBreakAtLineToAvoidWidow()); 328c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!m_rareData) 329c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return; 330c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 331c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) m_rareData->m_lineBreakToAvoidWidow = -1; 332c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 333c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 33409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)bool RenderBlockFlow::isSelfCollapsingBlock() const 33509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 33609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_hasOnlySelfCollapsingChildren = RenderBlock::isSelfCollapsingBlock(); 33709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return m_hasOnlySelfCollapsingChildren; 338a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)} 339a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 34009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)void RenderBlockFlow::layoutBlock(bool relayoutChildren) 3418abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles){ 3428abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) ASSERT(needsLayout()); 34309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ASSERT(isInlineBlockOrInlineTable() || !isInline()); 3448abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 34509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // If we are self-collapsing with self-collapsing descendants this will get set to save us burrowing through our 34609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // descendants every time in |isSelfCollapsingBlock|. We reset it here so that |isSelfCollapsingBlock| attempts to burrow 34709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // at least once and so that it always gives a reliable result reflecting the latest layout. 34809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_hasOnlySelfCollapsingChildren = false; 3498abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 3508abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!relayoutChildren && simplifiedLayout()) 3518abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) return; 3528abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 35310f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch SubtreeLayoutScope layoutScope(*this); 35409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 35509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // Multiple passes might be required for column and pagination based layout 35609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // In the case of the old column code the number of passes will only be two 35709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // however, in the newer column code the number of passes could equal the 35809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // number of columns. 35909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool done = false; 36009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit pageLogicalHeight = 0; 36109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) while (!done) 36209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) done = layoutBlockFlow(relayoutChildren, pageLogicalHeight, layoutScope); 36307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 36407a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch fitBorderToLinesIfNeeded(); 36507a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 36607a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch RenderView* renderView = view(); 36707a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch if (renderView->layoutState()->pageLogicalHeight()) 36807a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch setPageLogicalOffset(renderView->layoutState()->pageLogicalOffset(*this, logicalTop())); 36907a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 37076c265b59aa821ccbf8c75ab2bb0d036e97d2956Torne (Richard Coles) updateLayerTransformAfterLayout(); 37107a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 37207a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // Update our scroll information if we're overflow:auto/scroll/hidden now that we know if 37307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // we overflow or not. 37407a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch updateScrollInfoAfterLayout(); 37507a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 3769e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) if (m_paintInvalidationLogicalTop != m_paintInvalidationLogicalBottom) { 377e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) bool hasVisibleContent = style()->visibility() == VISIBLE; 378e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) if (!hasVisibleContent) { 379e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) RenderLayer* layer = enclosingLayer(); 380e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) layer->updateDescendantDependentFlags(); 381e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) hasVisibleContent = layer->hasVisibleContent(); 382e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) } 383e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) if (hasVisibleContent) 384e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) setShouldInvalidateOverflowForPaint(true); 385e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) } 386197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 3877242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (isHTMLDialogElement(node()) && isOutOfFlowPositioned()) 3887242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci positionDialog(); 3897242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 39007a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch clearNeedsLayout(); 39109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 39209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 39309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline bool RenderBlockFlow::layoutBlockFlow(bool relayoutChildren, LayoutUnit &pageLogicalHeight, SubtreeLayoutScope& layoutScope) 39409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 395d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) LayoutUnit oldLeft = logicalLeft(); 396c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) bool logicalWidthChanged = updateLogicalWidthAndColumnWidth(); 397c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) relayoutChildren |= logicalWidthChanged; 3988abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 3991e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles) rebuildFloatsFromIntruding(); 4008abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4018abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) bool pageLogicalHeightChanged = false; 4028abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) bool hasSpecifiedPageLogicalHeight = false; 4038abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) checkForPaginationLogicalHeightChange(pageLogicalHeight, pageLogicalHeightChanged, hasSpecifiedPageLogicalHeight); 404a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch if (pageLogicalHeightChanged) 405a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch relayoutChildren = true; 4068abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 407c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutState state(*this, locationOffset(), pageLogicalHeight, pageLogicalHeightChanged, columnInfo(), logicalWidthChanged); 4088abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4098abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // We use four values, maxTopPos, maxTopNeg, maxBottomPos, and maxBottomNeg, to track 4108abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // our current maximal positive and negative margins. These values are used when we 4118abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // are collapsed with adjacent blocks, so for example, if you have block A and B 4128abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // collapsing together, then you'd take the maximal positive margin from both A and B 4138abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // and subtract it from the maximal negative margin from both A and B to get the 4148abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // true collapsed margin. This algorithm is recursive, so when we finish layout() 4158abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // our block knows its current maximal positive/negative values. 4168abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // 4178abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Start out by setting our margin values to our current margins. Table cells have 4188abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // no margins, so we don't fill in the values for table cells. 41909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!isTableCell()) { 4208abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) initMaxMarginValues(); 42109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setHasMarginBeforeQuirk(style()->hasMarginBeforeQuirk()); 42209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setHasMarginAfterQuirk(style()->hasMarginAfterQuirk()); 4238abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) setPaginationStrut(0); 4248abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 4258abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 42609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit beforeEdge = borderBefore() + paddingBefore(); 42709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit afterEdge = borderAfter() + paddingAfter() + scrollbarLogicalHeight(); 42809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit previousHeight = logicalHeight(); 42909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setLogicalHeight(beforeEdge); 4308abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4319e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) m_paintInvalidationLogicalTop = 0; 4329e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) m_paintInvalidationLogicalBottom = 0; 4338abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!firstChild() && !isAnonymousBlock()) 4348abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) setChildrenInline(true); 43509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 436c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) TextAutosizer::LayoutScope textAutosizerLayoutScope(this); 43709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 4388abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (childrenInline()) 4399e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) layoutInlineChildren(relayoutChildren, m_paintInvalidationLogicalTop, m_paintInvalidationLogicalBottom, afterEdge); 4408abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) else 44110f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch layoutBlockChildren(relayoutChildren, layoutScope, beforeEdge, afterEdge); 4428abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4438abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Expand our intrinsic height to encompass floats. 44409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (lowestFloatLogicalBottom() > (logicalHeight() - afterEdge) && createsBlockFormattingContext()) 44509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setLogicalHeight(lowestFloatLogicalBottom() + afterEdge); 4468abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 447d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread()) { 448d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (flowThread->recalculateColumnHeights()) { 44909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setChildNeedsLayout(MarkOnlyThis); 45009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return false; 45109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 45209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else if (hasColumns()) { 45309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) OwnPtr<RenderOverflow> savedOverflow = m_overflow.release(); 45409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (childrenInline()) 45509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) addOverflowFromInlineChildren(); 45609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) else 45709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) addOverflowFromBlockChildren(); 45809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit layoutOverflowLogicalBottom = (isHorizontalWritingMode() ? layoutOverflowRect().maxY() : layoutOverflowRect().maxX()) - borderBefore() - paddingBefore(); 45909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_overflow = savedOverflow.release(); 46009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 46109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!hasSpecifiedPageLogicalHeight && shouldRelayoutForPagination(pageLogicalHeight, layoutOverflowLogicalBottom)) { 46209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setEverHadLayout(true); 46309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return false; 46409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 46509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 46643e7502580f146aa5b3db8267ba6dbb5c733a489Torne (Richard Coles) setColumnCountAndHeight(ceilf(layoutOverflowLogicalBottom.toFloat() / pageLogicalHeight.toFloat()), pageLogicalHeight.toFloat()); 46709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 46809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 46909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (shouldBreakAtLineToAvoidWidow()) { 47009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setEverHadLayout(true); 47109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return false; 472bfe3590b1806e3ff18f46ee3af5d4b83078f305aTorne (Richard Coles) } 4738abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4748abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Calculate our new height. 4758abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit oldHeight = logicalHeight(); 4768abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit oldClientAfterEdge = clientLogicalBottom(); 4778abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4788abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) updateLogicalHeight(); 4798abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit newHeight = logicalHeight(); 48010f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (oldHeight > newHeight && !childrenInline()) { 48110f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch // One of our children's floats may have become an overhanging float for us. 48210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 48310f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (child->isRenderBlockFlow() && !child->isFloatingOrOutOfFlowPositioned()) { 48410f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch RenderBlockFlow* block = toRenderBlockFlow(child); 48510f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (block->lowestFloatLogicalBottom() + block->logicalTop() <= newHeight) 48610f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch break; 48710f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch addOverhangingFloats(block, false); 4888abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 4898abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 4908abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 4918abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4928abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) bool heightChanged = (previousHeight != newHeight); 4938abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (heightChanged) 4948abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) relayoutChildren = true; 4958abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4966f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch layoutPositionedObjects(relayoutChildren || isDocumentElement(), oldLeft != logicalLeft() ? ForcedLayoutAfterContainingBlockMoved : DefaultLayout); 4978abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 4988abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Add overflow from children (unless we're multi-column, since in that case all our child overflow is clipped anyway). 4998abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) computeOverflow(oldClientAfterEdge); 5008abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 501197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch m_descendantsWithFloatsMarkedForLayout = false; 50209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return true; 5038abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)} 5048abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 505197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::determineLogicalLeftPositionForChild(RenderBox* child) 506d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 507d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) LayoutUnit startPosition = borderStart() + paddingStart(); 5089e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) LayoutUnit initialStartPosition = startPosition; 509d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (style()->shouldPlaceBlockDirectionScrollbarOnLogicalLeft()) 510d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) startPosition -= verticalScrollbarWidth(); 511d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) LayoutUnit totalAvailableLogicalWidth = borderAndPaddingLogicalWidth() + availableLogicalWidth(); 512d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 513d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) LayoutUnit childMarginStart = marginStartForChild(child); 514d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) LayoutUnit newPosition = startPosition + childMarginStart; 515d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 5169e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) LayoutUnit positionToAvoidFloats; 517d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (child->avoidsFloats() && containsFloats() && !flowThreadContainingBlock()) 5189e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) positionToAvoidFloats = startOffsetForLine(logicalTopForChild(child), false, logicalHeightForChild(child)); 5199e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) 5209e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // If the child has an offset from the content edge to avoid floats then use that, otherwise let any negative 5219e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // margin pull it back over the content edge or any positive margin push it out. 5229e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // If the child is being centred then the margin calculated to do that has factored in any offset required to 5239e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // avoid floats, so use it if necessary. 5249e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) if (style()->textAlign() == WEBKIT_CENTER || child->style()->marginStartUsing(style()).isAuto()) 5259e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) newPosition = std::max(newPosition, positionToAvoidFloats + childMarginStart); 5269e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) else if (positionToAvoidFloats > initialStartPosition) 5279e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) newPosition = std::max(newPosition, positionToAvoidFloats); 528d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 529197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalLeftForChild(child, style()->isLeftToRightDirection() ? newPosition : totalAvailableLogicalWidth - newPosition - logicalWidthForChild(child)); 530d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 531d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 532197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::setLogicalLeftForChild(RenderBox* child, LayoutUnit logicalLeft) 533d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 534d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (isHorizontalWritingMode()) { 535d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) child->setX(logicalLeft); 536d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } else { 537d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) child->setY(logicalLeft); 538d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 539d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 540d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 541197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::setLogicalTopForChild(RenderBox* child, LayoutUnit logicalTop) 542d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 543d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (isHorizontalWritingMode()) { 544d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) child->setY(logicalTop); 545d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } else { 546d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) child->setX(logicalTop); 547d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 548d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 549d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 55010f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdochvoid RenderBlockFlow::layoutBlockChild(RenderBox* child, MarginInfo& marginInfo, LayoutUnit& previousFloatLogicalBottom) 5519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 5529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit oldPosMarginBefore = maxPositiveMarginBefore(); 5539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit oldNegMarginBefore = maxNegativeMarginBefore(); 5549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 5559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child is a normal flow object. Compute the margins we will use for collapsing now. 5569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->computeAndSetBlockDirectionMargins(this); 5579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 5589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Try to guess our correct logical top position. In most cases this guess will 5599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // be correct. Only if we're wrong (when we compute the real logical top position) 5609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // will we have to potentially relayout. 5619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit estimateWithoutPagination; 5629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTopEstimate = estimateLogicalTopPosition(child, marginInfo, estimateWithoutPagination); 5639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 5649e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // Cache our old rect so that we can dirty the proper paint invalidation rects if the child moves. 5659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutRect oldRect = child->frameRect(); 5669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit oldLogicalTop = logicalTopForChild(child); 5679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 5689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Go ahead and position the child as though it didn't collapse with the top. 569197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalTopForChild(child, logicalTopEstimate); 5709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 571c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) RenderBlockFlow* childRenderBlockFlow = child->isRenderBlockFlow() ? toRenderBlockFlow(child) : 0; 5729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool markDescendantsWithFloats = false; 573c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (logicalTopEstimate != oldLogicalTop && childRenderBlockFlow && !childRenderBlockFlow->avoidsFloats() && childRenderBlockFlow->containsFloats()) { 5749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) markDescendantsWithFloats = true; 5759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else if (UNLIKELY(logicalTopEstimate.mightBeSaturated())) { 5769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // logicalTopEstimate, returned by estimateLogicalTopPosition, might be saturated for 5779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // very large elements. If it does the comparison with oldLogicalTop might yield a 5789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // false negative as adding and removing margins, borders etc from a saturated number 5799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // might yield incorrect results. If this is the case always mark for layout. 5809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) markDescendantsWithFloats = true; 5819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else if (!child->avoidsFloats() || child->shrinkToAvoidFloats()) { 5829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If an element might be affected by the presence of floats, then always mark it for 5839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // layout. 584197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit fb = std::max(previousFloatLogicalBottom, lowestFloatLogicalBottom()); 5859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (fb > logicalTopEstimate) 5869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) markDescendantsWithFloats = true; 5879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 5889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 589f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childRenderBlockFlow) { 5909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (markDescendantsWithFloats) 591f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childRenderBlockFlow->markAllDescendantsWithFloatsForLayout(); 5929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) 593197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch previousFloatLogicalBottom = std::max(previousFloatLogicalBottom, oldLogicalTop + childRenderBlockFlow->lowestFloatLogicalBottom()); 5949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 5959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 59610f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch SubtreeLayoutScope layoutScope(*child); 5979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->needsLayout()) 5989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->markForPaginationRelayoutIfNeeded(layoutScope); 5999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool childHadLayout = child->everHadLayout(); 6019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool childNeededLayout = child->needsLayout(); 6029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childNeededLayout) 6039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->layout(); 6049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Cache if we are at the top of the block right now. 6069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool atBeforeSideOfBlock = marginInfo.atBeforeSideOfBlock(); 60709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool childIsSelfCollapsing = child->isSelfCollapsingBlock(); 6089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now determine the correct ypos based off examination of collapsing margin 6109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // values. 61109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit logicalTopBeforeClear = collapseMargins(child, marginInfo, childIsSelfCollapsing); 6129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now check for clear. 61409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit logicalTopAfterClear = clearFloatsIfNeeded(child, marginInfo, oldPosMarginBefore, oldNegMarginBefore, logicalTopBeforeClear, childIsSelfCollapsing); 6159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool paginated = view()->layoutState()->isPaginated(); 6179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (paginated) { 6189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTopAfterClear = adjustBlockChildForPagination(logicalTopAfterClear, estimateWithoutPagination, child, 6199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) atBeforeSideOfBlock && logicalTopBeforeClear == logicalTopAfterClear); 6209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 6219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 622197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalTopForChild(child, logicalTopAfterClear); 6239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now we have a final top position. See if it really does end up being different from our estimate. 6259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // clearFloatsIfNeeded can also mark the child as needing a layout even though we didn't move. This happens 6269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // when collapseMargins dynamically adds overhanging floats because of a child with negative margins. 627c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (logicalTopAfterClear != logicalTopEstimate || child->needsLayout() || (paginated && childRenderBlockFlow && childRenderBlockFlow->shouldBreakAtLineToAvoidWidow())) { 62810f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch SubtreeLayoutScope layoutScope(*child); 6299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->shrinkToAvoidFloats()) { 6309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child's width depends on the line width. 6319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // When the child shifts to clear an item, its width can 6329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // change (because it has more available line width). 6339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // So go ahead and mark the item as dirty. 6349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) layoutScope.setChildNeedsLayout(child); 6359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 6369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 637c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (childRenderBlockFlow && !childRenderBlockFlow->avoidsFloats() && childRenderBlockFlow->containsFloats()) 638c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) childRenderBlockFlow->markAllDescendantsWithFloatsForLayout(); 639c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 640c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!child->needsLayout()) 641c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) child->markForPaginationRelayoutIfNeeded(layoutScope); 6429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Our guess was wrong. Make the child lay itself out again. 6449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->layoutIfNeeded(); 6459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 6469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 64709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // If we previously encountered a self-collapsing sibling of this child that had clearance then 64809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // we set this bit to ensure we would not collapse the child's margins, and those of any subsequent 64909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // self-collapsing siblings, with our parent. If this child is not self-collapsing then it can 65009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // collapse its margins with the parent so reset the bit. 65109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!marginInfo.canCollapseMarginAfterWithLastChild() && !childIsSelfCollapsing) 65209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) marginInfo.setCanCollapseMarginAfterWithLastChild(true); 65309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 6549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We are no longer at the top of the block if we encounter a non-empty child. 6559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This has to be done after checking for clear, so that margins can be reset if a clear occurred. 65609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (marginInfo.atBeforeSideOfBlock() && !childIsSelfCollapsing) 6579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setAtBeforeSideOfBlock(false); 6589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now place the child in the correct left position 660197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch determineLogicalLeftPositionForChild(child); 6619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 66206f816c7c76bc45a15e452ade8a34e8af077693eTorne (Richard Coles) LayoutSize childOffset = child->location() - oldRect.location(); 66306f816c7c76bc45a15e452ade8a34e8af077693eTorne (Richard Coles) 6649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Update our height now that the child has been placed in the correct position. 6659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + logicalHeightForChild(child)); 6669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (mustSeparateMarginAfterForChild(child)) { 6679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + marginAfterForChild(child)); 6689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.clearMargin(); 6699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 6709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If the child has overhanging floats that intrude into following siblings (or possibly out 6719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // of this block), then the parent gets notified of the floats now. 67210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (childRenderBlockFlow) 67310f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch addOverhangingFloats(childRenderBlockFlow, !childNeededLayout); 6749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 675197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // If the child moved, we have to invalidate it's paint as well as any floating/positioned 676197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // descendants. An exception is if we need a layout. In this case, we know we're going to 677197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // invalidate our paint (and the child) anyway. 678197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch bool didNotDoFullLayoutAndMoved = childHadLayout && !selfNeedsLayout() && (childOffset.width() || childOffset.height()); 679197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch bool didNotLayoutAndNeedsPaintInvalidation = !childHadLayout && child->checkForPaintInvalidation(); 6809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 681197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (didNotDoFullLayoutAndMoved || didNotLayoutAndNeedsPaintInvalidation) 682197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch child->invalidatePaintForOverhangingFloats(true); 6839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (paginated) { 6859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Check for an after page/column break. 6869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit newHeight = applyAfterBreak(child, logicalHeight(), marginInfo); 6879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (newHeight != height()) 6889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(newHeight); 6899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 6909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 6919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)LayoutUnit RenderBlockFlow::adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, RenderBox* child, bool atBeforeSideOfBlock) 6939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 694197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch RenderBlockFlow* childBlockFlow = child->isRenderBlockFlow() ? toRenderBlockFlow(child) : 0; 6959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 6969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (estimateWithoutPagination != logicalTopAfterClear) { 6979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Our guess prior to pagination movement was wrong. Before we attempt to paginate, let's try again at the new 6989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // position. 6999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalTopAfterClear); 700197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalTopForChild(child, logicalTopAfterClear); 7019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->shrinkToAvoidFloats()) { 7039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child's width depends on the line width. 7049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // When the child shifts to clear an item, its width can 7059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // change (because it has more available line width). 7069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // So go ahead and mark the item as dirty. 7079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->setChildNeedsLayout(MarkOnlyThis); 7089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 7099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 71010f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch SubtreeLayoutScope layoutScope(*child); 7119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 712197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (childBlockFlow) { 713c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!childBlockFlow->avoidsFloats() && childBlockFlow->containsFloats()) 714197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch childBlockFlow->markAllDescendantsWithFloatsForLayout(); 7159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->needsLayout()) 7169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->markForPaginationRelayoutIfNeeded(layoutScope); 7179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 7189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Our guess was wrong. Make the child lay itself out again. 7209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->layoutIfNeeded(); 7219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 7229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit oldTop = logicalTopAfterClear; 7249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If the object has a page or column break value of "before", then we should shift to the top of the next page. 7269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit result = applyBeforeBreak(child, logicalTopAfterClear); 7279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // For replaced elements and scrolled elements, we want to shift them to the next page if they don't fit on the current one. 7299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTopBeforeUnsplittableAdjustment = result; 7309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTopAfterUnsplittableAdjustment = adjustForUnsplittableChild(child, result); 7319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit paginationStrut = 0; 7339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit unsplittableAdjustmentDelta = logicalTopAfterUnsplittableAdjustment - logicalTopBeforeUnsplittableAdjustment; 734d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) LayoutUnit childLogicalHeight = child->logicalHeight(); 735d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (unsplittableAdjustmentDelta) { 736d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) setPageBreak(result, childLogicalHeight - unsplittableAdjustmentDelta); 7379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) paginationStrut = unsplittableAdjustmentDelta; 738197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } else if (childBlockFlow && childBlockFlow->paginationStrut()) { 739197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch paginationStrut = childBlockFlow->paginationStrut(); 740d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } 7419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (paginationStrut) { 7439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We are willing to propagate out to our parent block as long as we were at the top of the block prior 7449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // to collapsing our margins, and as long as we didn't clear or move as a result of other pagination. 7459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (atBeforeSideOfBlock && oldTop == result && !isOutOfFlowPositioned() && !isTableCell()) { 7469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: Should really check if we're exceeding the page height before propagating the strut, but we don't 7479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // have all the information to do so (the strut only has the remaining amount to push). Gecko gets this wrong too 7489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // and pushes to the next page anyway, so not too concerned about it. 7499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setPaginationStrut(result + paginationStrut); 750197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (childBlockFlow) 751197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch childBlockFlow->setPaginationStrut(0); 7529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 7539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) result += paginationStrut; 7549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 7559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 7569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 757d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (!unsplittableAdjustmentDelta) { 758d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(result)) { 759d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) LayoutUnit remainingLogicalHeight = pageRemainingLogicalHeightForOffset(result, ExcludePageBoundary); 760d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) LayoutUnit spaceShortage = childLogicalHeight - remainingLogicalHeight; 761d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (spaceShortage > 0) { 762d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // If the child crosses a column boundary, report a break, in case nothing inside it 763d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // has already done so. The column balancer needs to know how much it has to stretch 764d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // the columns to make more content fit. If no breaks are reported (but do occur), 765d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // the balancer will have no clue. Only measure the space after the last column 766d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // boundary, in case it crosses more than one. 767d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) LayoutUnit spaceShortageInLastColumn = intMod(spaceShortage, pageLogicalHeight); 768d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) setPageBreak(result, spaceShortageInLastColumn ? spaceShortageInLastColumn : spaceShortage); 769d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } else if (remainingLogicalHeight == pageLogicalHeight && offsetFromLogicalTopOfFirstPage() + child->logicalTop()) { 770d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // We're at the very top of a page or column, and it's not the first one. This child 771d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // may turn out to be the smallest piece of content that causes a page break, so we 772d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) // need to report it. 773d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) setPageBreak(result, childLogicalHeight); 774d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } 775d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } 776d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } 777d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) 7789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Similar to how we apply clearance. Go ahead and boost height() to be the place where we're going to position the child. 7799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + (result - oldTop)); 7809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 7819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Return the final adjusted logical top. 7829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return result; 7839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 7849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 785197021e6b966cfb06891637935ef33fff06433d1Ben Murdochstatic inline LayoutUnit calculateMinimumPageHeight(RenderStyle* renderStyle, RootInlineBox* lastLine, LayoutUnit lineTop, LayoutUnit lineBottom) 786197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 787197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // We may require a certain minimum number of lines per page in order to satisfy 788197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // orphans and widows, and that may affect the minimum page height. 789197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch unsigned lineCount = std::max<unsigned>(renderStyle->hasAutoOrphans() ? 1 : renderStyle->orphans(), renderStyle->hasAutoWidows() ? 1 : renderStyle->widows()); 790197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (lineCount > 1) { 791197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch RootInlineBox* line = lastLine; 792197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch for (unsigned i = 1; i < lineCount && line->prevRootBox(); i++) 793197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch line = line->prevRootBox(); 794197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 795197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // FIXME: Paginating using line overflow isn't all fine. See FIXME in 796197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // adjustLinePositionForPagination() for more details. 797197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutRect overflow = line->logicalVisualOverflowRect(line->lineTop(), line->lineBottom()); 798197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineTop = std::min(line->lineTopWithLeading(), overflow.y()); 799197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 800197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return lineBottom - lineTop; 801197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 802197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 803197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::adjustLinePositionForPagination(RootInlineBox* lineBox, LayoutUnit& delta, RenderFlowThread* flowThread) 804197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 805197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // FIXME: For now we paginate using line overflow. This ensures that lines don't overlap at all when we 806197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // put a strut between them for pagination purposes. However, this really isn't the desired rendering, since 807197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // the line on the top of the next page will appear too far down relative to the same kind of line at the top 808197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // of the first column. 809197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // 810197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // The rendering we would like to see is one where the lineTopWithLeading is at the top of the column, and any line overflow 811197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // simply spills out above the top of the column. This effect would match what happens at the top of the first column. 812197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // We can't achieve this rendering, however, until we stop columns from clipping to the column bounds (thus allowing 813197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // for overflow to occur), and then cache visible overflow for each column rect. 814197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // 815197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // Furthermore, the paint we have to do when a column has overflow has to be special. We need to exclude 816197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // content that paints in a previous column (and content that paints in the following column). 817197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // 818197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // For now we'll at least honor the lineTopWithLeading when paginating if it is above the logical top overflow. This will 819197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // at least make positive leading work in typical cases. 820197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // 821197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // FIXME: Another problem with simply moving lines is that the available line width may change (because of floats). 822197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // Technically if the location we move the line to has a different line width than our old position, then we need to dirty the 823197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // line and all following lines. 824197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutRect logicalVisualOverflow = lineBox->logicalVisualOverflowRect(lineBox->lineTop(), lineBox->lineBottom()); 825197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit logicalOffset = std::min(lineBox->lineTopWithLeading(), logicalVisualOverflow.y()); 826197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit logicalBottom = std::max(lineBox->lineBottomWithLeading(), logicalVisualOverflow.maxY()); 827197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit lineHeight = logicalBottom - logicalOffset; 828197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch updateMinimumPageHeight(logicalOffset, calculateMinimumPageHeight(style(), lineBox, logicalOffset, logicalBottom)); 829197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalOffset += delta; 830197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineBox->setPaginationStrut(0); 831197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineBox->setIsFirstAfterPageBreak(false); 832197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); 833197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch bool hasUniformPageLogicalHeight = !flowThread || flowThread->regionsHaveUniformLogicalHeight(); 834197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // If lineHeight is greater than pageLogicalHeight, but logicalVisualOverflow.height() still fits, we are 835197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // still going to add a strut, so that the visible overflow fits on a single page. 836197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (!pageLogicalHeight || (hasUniformPageLogicalHeight && logicalVisualOverflow.height() > pageLogicalHeight)) { 837197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // FIXME: In case the line aligns with the top of the page (or it's slightly shifted downwards) it will not be marked as the first line in the page. 838197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // From here, the fix is not straightforward because it's not easy to always determine when the current line is the first in the page. 839197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return; 840197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 841197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit remainingLogicalHeight = pageRemainingLogicalHeightForOffset(logicalOffset, ExcludePageBoundary); 842197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 843197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch int lineIndex = lineCount(lineBox); 844197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (remainingLogicalHeight < lineHeight || (shouldBreakAtLineToAvoidWidow() && lineBreakToAvoidWidow() == lineIndex)) { 845197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (shouldBreakAtLineToAvoidWidow() && lineBreakToAvoidWidow() == lineIndex) { 846197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch clearShouldBreakAtLineToAvoidWidow(); 847197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setDidBreakAtLineToAvoidWidow(); 848197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 849197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (lineHeight > pageLogicalHeight) { 850197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // Split the top margin in order to avoid splitting the visible part of the line. 851197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch remainingLogicalHeight -= std::min(lineHeight - pageLogicalHeight, std::max<LayoutUnit>(0, logicalVisualOverflow.y() - lineBox->lineTopWithLeading())); 852197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 853197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit totalLogicalHeight = lineHeight + std::max<LayoutUnit>(0, logicalOffset); 854197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit pageLogicalHeightAtNewOffset = hasUniformPageLogicalHeight ? pageLogicalHeight : pageLogicalHeightForOffset(logicalOffset + remainingLogicalHeight); 855197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setPageBreak(logicalOffset, lineHeight - remainingLogicalHeight); 856197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (((lineBox == firstRootBox() && totalLogicalHeight < pageLogicalHeightAtNewOffset) || (!style()->hasAutoOrphans() && style()->orphans() >= lineIndex)) 857197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch && !isOutOfFlowPositioned() && !isTableCell()) { 858197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setPaginationStrut(remainingLogicalHeight + std::max<LayoutUnit>(0, logicalOffset)); 859197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } else { 860197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch delta += remainingLogicalHeight; 861197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineBox->setPaginationStrut(remainingLogicalHeight); 862197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineBox->setIsFirstAfterPageBreak(true); 863197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 864197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } else if (remainingLogicalHeight == pageLogicalHeight) { 865197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // We're at the very top of a page or column. 866197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (lineBox != firstRootBox()) 867197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch lineBox->setIsFirstAfterPageBreak(true); 868197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (lineBox != firstRootBox() || offsetFromLogicalTopOfFirstPage()) 869197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setPageBreak(logicalOffset, lineHeight); 870197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 871197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 872197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 8737242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano TucciLayoutUnit RenderBlockFlow::adjustForUnsplittableChild(RenderBox* child, LayoutUnit logicalOffset, bool includeMargins) 8747242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci{ 8757242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci bool checkColumnBreaks = view()->layoutState()->isPaginatingColumns() || flowThreadContainingBlock(); 8767242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight(); 8777242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci bool isUnsplittable = child->isUnsplittableForPagination() || (checkColumnBreaks && child->style()->columnBreakInside() == PBAVOID) 8787242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci || (checkPageBreaks && child->style()->pageBreakInside() == PBAVOID); 8797242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (!isUnsplittable) 8807242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return logicalOffset; 8817242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci LayoutUnit childLogicalHeight = logicalHeightForChild(child) + (includeMargins ? marginBeforeForChild(child) + marginAfterForChild(child) : LayoutUnit()); 8827242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset); 8837242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci updateMinimumPageHeight(logicalOffset, childLogicalHeight); 8847242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (!pageLogicalHeight || childLogicalHeight > pageLogicalHeight) 8857242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return logicalOffset; 8867242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci LayoutUnit remainingLogicalHeight = pageRemainingLogicalHeightForOffset(logicalOffset, ExcludePageBoundary); 8877242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (remainingLogicalHeight < childLogicalHeight) 8887242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return logicalOffset + remainingLogicalHeight; 8897242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return logicalOffset; 8907242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci} 8917242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 8921e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)void RenderBlockFlow::rebuildFloatsFromIntruding() 8938abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles){ 8948abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (m_floatingObjects) 8958abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) m_floatingObjects->setHorizontalWritingMode(isHorizontalWritingMode()); 8968abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 8978abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) HashSet<RenderBox*> oldIntrudingFloatSet; 8988abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!childrenInline() && m_floatingObjects) { 8998abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 9008abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 9018abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 902d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 9038abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!floatingObject->isDescendant()) 9048abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) oldIntrudingFloatSet.add(floatingObject->renderer()); 9058abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9068abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9078abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 9088abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Inline blocks are covered by the isReplaced() check in the avoidFloats method. 909197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (avoidsFloats() || isDocumentElement() || isRenderView() || isFloatingOrOutOfFlowPositioned() || isTableCell()) { 9108abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (m_floatingObjects) { 9118abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) m_floatingObjects->clear(); 9128abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9138abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!oldIntrudingFloatSet.isEmpty()) 9148abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) markAllDescendantsWithFloatsForLayout(); 9158abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) return; 9168abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9178abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 9188abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RendererToFloatInfoMap floatMap; 9198abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 9208abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (m_floatingObjects) { 9219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childrenInline()) 9229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_floatingObjects->moveAllToFloatInfoMap(floatMap); 9239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) else 9249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_floatingObjects->clear(); 9258abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9268abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 927f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // We should not process floats if the parent node is not a RenderBlockFlow. Otherwise, we will add 9288abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // floats in an invalid context. This will cause a crash arising from a bad cast on the parent. 9298abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // See <rdar://problem/8049753>, where float property is applied on a text node in a SVG. 930f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!parent() || !parent()->isRenderBlockFlow()) 9318abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) return; 9328abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 933f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu // Attempt to locate a previous sibling with overhanging floats. We skip any elements that 934f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu // may have shifted to avoid floats, and any objects whose floats cannot interact with objects 935f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu // outside it (i.e. objects that create a new block formatting context). 936f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* parentBlockFlow = toRenderBlockFlow(parent()); 9378abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) bool parentHasFloats = false; 9388abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RenderObject* prev = previousSibling(); 939197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch while (prev && (!prev->isBox() || !prev->isRenderBlock() || toRenderBlock(prev)->avoidsFloats() || toRenderBlock(prev)->createsBlockFormattingContext())) { 9408abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (prev->isFloating()) 9418abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) parentHasFloats = true; 9428abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) prev = prev->previousSibling(); 9438abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9448abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 945a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // First add in floats from the parent. Self-collapsing blocks let their parent track any floats that intrude into 946a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // them (as opposed to floats they contain themselves) so check for those here too. 9478abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit logicalTopOffset = logicalTop(); 94810f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch bool parentHasIntrudingFloats = !parentHasFloats && (!prev || toRenderBlockFlow(prev)->isSelfCollapsingBlock()) && parentBlockFlow->lowestFloatLogicalBottom() > logicalTopOffset; 94910f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (parentHasFloats || parentHasIntrudingFloats) 950f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) addIntrudingFloats(parentBlockFlow, parentBlockFlow->logicalLeftOffsetForContent(), logicalTopOffset); 9518abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 95210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch // Add overhanging floats from the previous RenderBlockFlow, but only if it has a float that intrudes into our space. 9538abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (prev) { 95410f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch RenderBlockFlow* blockFlow = toRenderBlockFlow(prev); 95510f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch logicalTopOffset -= blockFlow->logicalTop(); 95610f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (blockFlow->lowestFloatLogicalBottom() > logicalTopOffset) 95710f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch addIntrudingFloats(blockFlow, 0, logicalTopOffset); 9588abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9598abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 9608abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (childrenInline()) { 9618abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit changeLogicalTop = LayoutUnit::max(); 9628abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit changeLogicalBottom = LayoutUnit::min(); 9638abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (m_floatingObjects) { 9648abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 9658abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 9668abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 967d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 968f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObject* oldFloatingObject = floatMap.get(floatingObject->renderer()); 969f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalBottom = logicalBottomForFloat(floatingObject); 9708abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (oldFloatingObject) { 971f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit oldLogicalBottom = logicalBottomForFloat(oldFloatingObject); 972f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (logicalWidthForFloat(floatingObject) != logicalWidthForFloat(oldFloatingObject) || logicalLeftForFloat(floatingObject) != logicalLeftForFloat(oldFloatingObject)) { 9738abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) changeLogicalTop = 0; 974197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalBottom = std::max(changeLogicalBottom, std::max(logicalBottom, oldLogicalBottom)); 9758abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } else { 9768abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (logicalBottom != oldLogicalBottom) { 977197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalTop = std::min(changeLogicalTop, std::min(logicalBottom, oldLogicalBottom)); 978197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalBottom = std::max(changeLogicalBottom, std::max(logicalBottom, oldLogicalBottom)); 9798abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 980f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalTop = logicalTopForFloat(floatingObject); 981f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit oldLogicalTop = logicalTopForFloat(oldFloatingObject); 9828abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (logicalTop != oldLogicalTop) { 983197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalTop = std::min(changeLogicalTop, std::min(logicalTop, oldLogicalTop)); 984197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalBottom = std::max(changeLogicalBottom, std::max(logicalTop, oldLogicalTop)); 9858abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9868abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9878abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 9888abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (oldFloatingObject->originatingLine() && !selfNeedsLayout()) { 9898abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) ASSERT(oldFloatingObject->originatingLine()->renderer() == this); 9908abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) oldFloatingObject->originatingLine()->markDirty(); 9918abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 992d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) 993d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) floatMap.remove(floatingObject->renderer()); 9948abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } else { 9958abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) changeLogicalTop = 0; 996197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalBottom = std::max(changeLogicalBottom, logicalBottom); 9978abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9988abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 9998abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10008abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10018abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RendererToFloatInfoMap::iterator end = floatMap.end(); 10028abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) for (RendererToFloatInfoMap::iterator it = floatMap.begin(); it != end; ++it) { 1003d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) OwnPtr<FloatingObject>& floatingObject = it->value; 10048abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!floatingObject->isDescendant()) { 10058abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) changeLogicalTop = 0; 1006197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch changeLogicalBottom = std::max(changeLogicalBottom, logicalBottomForFloat(floatingObject.get())); 10078abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10088abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10098abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10108abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) markLinesDirtyInBlockRange(changeLogicalTop, changeLogicalBottom); 10118abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } else if (!oldIntrudingFloatSet.isEmpty()) { 10128abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // If there are previously intruding floats that no longer intrude, then children with floats 10138abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // should also get layout because they might need their floating object lists cleared. 10148abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (m_floatingObjects->set().size() < oldIntrudingFloatSet.size()) { 10158abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) markAllDescendantsWithFloatsForLayout(); 10168abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } else { 10178abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 10188abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 10198abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end && !oldIntrudingFloatSet.isEmpty(); ++it) 10208abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) oldIntrudingFloatSet.remove((*it)->renderer()); 10218abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (!oldIntrudingFloatSet.isEmpty()) 10228abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) markAllDescendantsWithFloatsForLayout(); 10238abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10248abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10258abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)} 10268abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 102710f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdochvoid RenderBlockFlow::layoutBlockChildren(bool relayoutChildren, SubtreeLayoutScope& layoutScope, LayoutUnit beforeEdge, LayoutUnit afterEdge) 10288abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles){ 10298abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) dirtyForLayoutFromPercentageHeightDescendants(layoutScope); 10308abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10318abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // The margin struct caches all our current margin collapsing state. The compact struct caches state when we encounter compacts, 10328abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) MarginInfo marginInfo(this, beforeEdge, afterEdge); 10338abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10348abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Fieldsets need to find their legend and position it inside the border of the object. 10358abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // The legend then gets skipped during normal layout. The same is true for ruby text. 10368abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // It doesn't get included in the normal layout process but is instead skipped. 10378abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RenderObject* childToExclude = layoutSpecialExcludedChild(relayoutChildren, layoutScope); 10388abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10398abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) LayoutUnit previousFloatLogicalBottom = 0; 10408abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10418abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RenderBox* next = firstChildBox(); 104209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) RenderBox* lastNormalFlowChild = 0; 10438abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10448abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) while (next) { 10458abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) RenderBox* child = next; 10468abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) next = child->nextSiblingBox(); 10478abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 1048a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch // FIXME: this should only be set from clearNeedsLayout crbug.com/361250 1049a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch child->setLayoutDidGetCalled(true); 1050a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 10518abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (childToExclude == child) 10528abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) continue; // Skip this child, since it will be positioned by the specialized subclass (fieldsets and ruby runs). 10538abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10548abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) updateBlockChildDirtyBitsBeforeLayout(relayoutChildren, child); 10558abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10568abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (child->isOutOfFlowPositioned()) { 10578abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) child->containingBlock()->insertPositionedObject(child); 10588abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) adjustPositionedBlock(child, marginInfo); 10598abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) continue; 10608abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10618abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) if (child->isFloating()) { 10628abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) insertFloatingObject(child); 10638abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) adjustFloatingBlock(marginInfo); 10648abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) continue; 10658abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10668abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10678abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Lay out the child. 106810f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch layoutBlockChild(child, marginInfo, previousFloatLogicalBottom); 106909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) lastNormalFlowChild = child; 10708abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) } 10718abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10728abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // Now do the handling of the bottom of the block, adding in our bottom border/padding and 10738abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) // determining the correct collapsed bottom margin information. 107409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) handleAfterSideOfBlock(lastNormalFlowChild, beforeEdge, afterEdge, marginInfo); 10758abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles)} 10768abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) 10779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)// Our MarginInfo state used when laying out block children. 10789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)MarginInfo::MarginInfo(RenderBlockFlow* blockFlow, LayoutUnit beforeBorderPadding, LayoutUnit afterBorderPadding) 107909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) : m_canCollapseMarginAfterWithLastChild(true) 108009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) , m_atBeforeSideOfBlock(true) 10819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) , m_atAfterSideOfBlock(false) 10829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) , m_hasMarginBeforeQuirk(false) 10839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) , m_hasMarginAfterQuirk(false) 10849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) , m_determinedMarginBeforeQuirk(false) 10859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) , m_discardMargin(false) 10869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 10879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderStyle* blockStyle = blockFlow->style(); 10889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(blockFlow->isRenderView() || blockFlow->parent()); 108909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_canCollapseWithChildren = !blockFlow->createsBlockFormattingContext() && !blockFlow->isRenderFlowThread() && !blockFlow->isRenderView(); 10909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 10919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_canCollapseMarginBeforeWithChildren = m_canCollapseWithChildren && !beforeBorderPadding && blockStyle->marginBeforeCollapse() != MSEPARATE; 10929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 10939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If any height other than auto is specified in CSS, then we don't collapse our bottom 10949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // margins with our children's margins. To do otherwise would be to risk odd visual 10959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // effects when the children overflow out of the parent block and yet still collapse 10969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // with it. We also don't collapse if we have any bottom border/padding. 10979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_canCollapseMarginAfterWithChildren = m_canCollapseWithChildren && !afterBorderPadding 10989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) && (blockStyle->logicalHeight().isAuto() && !blockStyle->logicalHeight().value()) && blockStyle->marginAfterCollapse() != MSEPARATE; 10999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_quirkContainer = blockFlow->isTableCell() || blockFlow->isBody(); 11019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_discardMargin = m_canCollapseMarginBeforeWithChildren && blockFlow->mustDiscardMarginBefore(); 11039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_positiveMargin = (m_canCollapseMarginBeforeWithChildren && !blockFlow->mustDiscardMarginBefore()) ? blockFlow->maxPositiveMarginBefore() : LayoutUnit(); 11059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_negativeMargin = (m_canCollapseMarginBeforeWithChildren && !blockFlow->mustDiscardMarginBefore()) ? blockFlow->maxNegativeMarginBefore() : LayoutUnit(); 11069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 11079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)RenderBlockFlow::MarginValues RenderBlockFlow::marginValuesForChild(RenderBox* child) const 11099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 11109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit childBeforePositive = 0; 11119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit childBeforeNegative = 0; 11129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit childAfterPositive = 0; 11139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit childAfterNegative = 0; 11149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit beforeMargin = 0; 11169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit afterMargin = 0; 11179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBlockFlow* childRenderBlockFlow = child->isRenderBlockFlow() ? toRenderBlockFlow(child) : 0; 11199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If the child has the same directionality as we do, then we can just return its 11219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // margins in the same direction. 11229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) { 11239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childRenderBlockFlow) { 11249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforePositive = childRenderBlockFlow->maxPositiveMarginBefore(); 11259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforeNegative = childRenderBlockFlow->maxNegativeMarginBefore(); 11269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterPositive = childRenderBlockFlow->maxPositiveMarginAfter(); 11279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterNegative = childRenderBlockFlow->maxNegativeMarginAfter(); 11289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 11299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) beforeMargin = child->marginBefore(); 11309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) afterMargin = child->marginAfter(); 11319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else if (child->isHorizontalWritingMode() == isHorizontalWritingMode()) { 11339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child has a different directionality. If the child is parallel, then it's just 11349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // flipped relative to us. We can use the margins for the opposite edges. 11359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childRenderBlockFlow) { 11369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforePositive = childRenderBlockFlow->maxPositiveMarginAfter(); 11379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforeNegative = childRenderBlockFlow->maxNegativeMarginAfter(); 11389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterPositive = childRenderBlockFlow->maxPositiveMarginBefore(); 11399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterNegative = childRenderBlockFlow->maxNegativeMarginBefore(); 11409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 11419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) beforeMargin = child->marginAfter(); 11429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) afterMargin = child->marginBefore(); 11439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 11459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child is perpendicular to us, which means its margins don't collapse but are on the 11469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // "logical left/right" sides of the child box. We can just return the raw margin in this case. 11479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) beforeMargin = marginBeforeForChild(child); 11489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) afterMargin = marginAfterForChild(child); 11499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Resolve uncollapsing margins into their positive/negative buckets. 11529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (beforeMargin) { 11539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (beforeMargin > 0) 11549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforePositive = beforeMargin; 11559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) else 11569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBeforeNegative = -beforeMargin; 11579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (afterMargin) { 11599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (afterMargin > 0) 11609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterPositive = afterMargin; 11619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) else 11629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childAfterNegative = -afterMargin; 11639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return RenderBlockFlow::MarginValues(childBeforePositive, childBeforeNegative, childAfterPositive, childAfterNegative); 11669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 11679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 116809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)LayoutUnit RenderBlockFlow::collapseMargins(RenderBox* child, MarginInfo& marginInfo, bool childIsSelfCollapsing) 11699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 11709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool childDiscardMarginBefore = mustDiscardMarginBeforeForChild(child); 11719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool childDiscardMarginAfter = mustDiscardMarginAfterForChild(child); 11729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The child discards the before margin when the the after margin has discard in the case of a self collapsing block. 11749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childDiscardMarginBefore = childDiscardMarginBefore || (childDiscardMarginAfter && childIsSelfCollapsing); 11759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Get the four margin values for the child and cache them. 11779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) const RenderBlockFlow::MarginValues childMargins = marginValuesForChild(child); 11789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Get our max pos and neg top margins. 11809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit posTop = childMargins.positiveMarginBefore(); 11819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit negTop = childMargins.negativeMarginBefore(); 11829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // For self-collapsing blocks, collapse our bottom margins into our 11849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // top to get new posTop and negTop values. 11859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childIsSelfCollapsing) { 1186197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch posTop = std::max(posTop, childMargins.positiveMarginAfter()); 1187197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch negTop = std::max(negTop, childMargins.negativeMarginAfter()); 11889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 11899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // See if the top margin is quirky. We only care if this child has 11919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // margins that will collapse with us. 11929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool topQuirk = hasMarginBeforeQuirk(child); 11939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 11949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.canCollapseWithMarginBefore()) { 11959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!childDiscardMarginBefore && !marginInfo.discardMargin()) { 11969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This child is collapsing with the top of the 11979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // block. If it has larger margin values, then we need to update 11989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // our own maximal values. 11999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!document().inQuirksMode() || !marginInfo.quirkContainer() || !topQuirk) 1200197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setMaxMarginBeforeValues(std::max(posTop, maxPositiveMarginBefore()), std::max(negTop, maxNegativeMarginBefore())); 12019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The minute any of the margins involved isn't a quirk, don't 12039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // collapse it away, even if the margin is smaller (www.webreference.com 12049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // has an example of this, a <dt> with 0.8em author-specified inside 12059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // a <dl> inside a <td>. 12069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.determinedMarginBeforeQuirk() && !topQuirk && (posTop - negTop)) { 12079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setHasMarginBeforeQuirk(false); 12089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setDeterminedMarginBeforeQuirk(true); 12099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.determinedMarginBeforeQuirk() && topQuirk && !marginBefore()) { 12129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We have no top margin and our top child has a quirky margin. 12139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We will pick up this quirky margin and pass it through. 12149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This deals with the <td><div><p> case. 12159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Don't do this for a block that split two inlines though. You do 12169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // still apply margins in this case. 12179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setHasMarginBeforeQuirk(true); 12189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 12209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The before margin of the container will also discard all the margins it is collapsing with. 12219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setMustDiscardMarginBefore(); 12229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Once we find a child with discardMarginBefore all the margins collapsing with us must also discard. 12269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childDiscardMarginBefore) { 12279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setDiscardMargin(true); 12289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.clearMargin(); 12299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.quirkContainer() && marginInfo.atBeforeSideOfBlock() && (posTop - negTop)) 12329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setHasMarginBeforeQuirk(topQuirk); 12339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit beforeCollapseLogicalTop = logicalHeight(); 12359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTop = beforeCollapseLogicalTop; 1236a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 1237a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) LayoutUnit clearanceForSelfCollapsingBlock; 1238a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) RenderObject* prev = child->previousSibling(); 123909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) RenderBlockFlow* previousBlockFlow = prev && prev->isRenderBlockFlow() && !prev->isFloatingOrOutOfFlowPositioned() ? toRenderBlockFlow(prev) : 0; 1240a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // If the child's previous sibling is a self-collapsing block that cleared a float then its top border edge has been set at the bottom border edge 1241a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // of the float. Since we want to collapse the child's top margin with the self-collapsing block's top and bottom margins we need to adjust our parent's height to match the 1242a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // margin top of the self-collapsing block. If the resulting collapsed margin leaves the child still intruding into the float then we will want to clear it. 124309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!marginInfo.canCollapseWithMarginBefore() && previousBlockFlow && previousBlockFlow->isSelfCollapsingBlock()) { 124409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) clearanceForSelfCollapsingBlock = previousBlockFlow->marginOffsetForSelfCollapsingBlock(); 1245a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) setLogicalHeight(logicalHeight() - clearanceForSelfCollapsingBlock); 1246a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 1247a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 12489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childIsSelfCollapsing) { 12499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // For a self collapsing block both the before and after margins get discarded. The block doesn't contribute anything to the height of the block. 12509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Also, the child's top position equals the logical height of the container. 12519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!childDiscardMarginBefore && !marginInfo.discardMargin()) { 12529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This child has no height. We need to compute our 12539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // position before we collapse the child's margins together, 12549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // so that we can get an accurate position for the zero-height block. 1255197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit collapsedBeforePos = std::max(marginInfo.positiveMargin(), childMargins.positiveMarginBefore()); 1256197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit collapsedBeforeNeg = std::max(marginInfo.negativeMargin(), childMargins.negativeMarginBefore()); 12579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setMargin(collapsedBeforePos, collapsedBeforeNeg); 12589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now collapse the child's margins together, which means examining our 12609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // bottom margin values as well. 12619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setPositiveMarginIfLarger(childMargins.positiveMarginAfter()); 12629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setNegativeMarginIfLarger(childMargins.negativeMarginAfter()); 12639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.canCollapseWithMarginBefore()) { 12659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We need to make sure that the position of the self-collapsing block 12669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // is correct, since it could have overflowing content 12679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // that needs to be positioned correctly (e.g., a block that 12689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // had a specified height of 0 but that actually had subcontent). 12699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTop = logicalHeight() + collapsedBeforePos - collapsedBeforeNeg; 12709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 12739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (mustSeparateMarginBeforeForChild(child)) { 12749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!marginInfo.discardMargin() || (marginInfo.discardMargin() && !marginInfo.margin())); 12759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If we are at the before side of the block and we collapse, ignore the computed margin 12769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // and just add the child margin to the container height. This will correctly position 12779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // the child inside the container. 12789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit separateMargin = !marginInfo.canCollapseWithMarginBefore() ? marginInfo.margin() : LayoutUnit(0); 12799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + separateMargin + marginBeforeForChild(child)); 12809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTop = logicalHeight(); 12819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else if (!marginInfo.discardMargin() && (!marginInfo.atBeforeSideOfBlock() 12829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) || (!marginInfo.canCollapseMarginBeforeWithChildren() 12839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) && (!document().inQuirksMode() || !marginInfo.quirkContainer() || !marginInfo.hasMarginBeforeQuirk())))) { 12849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We're collapsing with a previous sibling's margins and not 12859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // with the top of the block. 1286197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalHeight(logicalHeight() + std::max(marginInfo.positiveMargin(), posTop) - std::max(marginInfo.negativeMargin(), negTop)); 12879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTop = logicalHeight(); 12889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setDiscardMargin(childDiscardMarginAfter); 12919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.discardMargin()) { 12939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setPositiveMargin(childMargins.positiveMarginAfter()); 12949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setNegativeMargin(childMargins.negativeMarginAfter()); 12959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 12969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.clearMargin(); 12979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 12989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 12999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.margin()) 13009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setHasMarginAfterQuirk(hasMarginAfterQuirk(child)); 13019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If margins would pull us past the top of the next page, then we need to pull back and pretend like the margins 13049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // collapsed into the page edge. 13059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutState* layoutState = view()->layoutState(); 130609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (layoutState->isPaginated() && layoutState->pageLogicalHeight() && logicalTop > beforeCollapseLogicalTop) { 13079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit oldLogicalTop = logicalTop; 1308197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTop = std::min(logicalTop, nextPageLogicalTop(beforeCollapseLogicalTop)); 13099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + (logicalTop - oldLogicalTop)); 13109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 131209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (previousBlockFlow) { 1313a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // If |child| is a self-collapsing block it may have collapsed into a previous sibling and although it hasn't reduced the height of the parent yet 1314a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // any floats from the parent will now overhang. 1315a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) LayoutUnit oldLogicalHeight = logicalHeight(); 1316a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) setLogicalHeight(logicalTop); 131710f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (!previousBlockFlow->avoidsFloats() && (previousBlockFlow->logicalTop() + previousBlockFlow->lowestFloatLogicalBottom()) > logicalTop) 131809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) addOverhangingFloats(previousBlockFlow, false); 1319a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) setLogicalHeight(oldLogicalHeight); 1320a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 1321a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // If |child|'s previous sibling is a self-collapsing block that cleared a float and margin collapsing resulted in |child| moving up 1322a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // into the margin area of the self-collapsing block then the float it clears is now intruding into |child|. Layout again so that we can look for 1323a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // floats in the parent that overhang |child|'s new logical top. 1324a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) bool logicalTopIntrudesIntoFloat = clearanceForSelfCollapsingBlock > 0 && logicalTop < beforeCollapseLogicalTop; 1325a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (logicalTopIntrudesIntoFloat && containsFloats() && !child->avoidsFloats() && lowestFloatLogicalBottom() > logicalTop) 13265d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) child->setNeedsLayoutAndFullPaintInvalidation(); 13279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return logicalTop; 13309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 13319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::adjustPositionedBlock(RenderBox* child, const MarginInfo& marginInfo) 13339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 13349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool isHorizontal = isHorizontalWritingMode(); 13359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool hasStaticBlockPosition = child->style()->hasStaticBlockPosition(isHorizontal); 13369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTop = logicalHeight(); 13389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) updateStaticInlinePositionForChild(child, logicalTop); 13399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.canCollapseWithMarginBefore()) { 13419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Positioned blocks don't collapse margins, so add the margin provided by 13429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // the container now. The child's own margin is added later when calculating its logical top. 13439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit collapsedBeforePos = marginInfo.positiveMargin(); 13449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit collapsedBeforeNeg = marginInfo.negativeMargin(); 13459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTop += collapsedBeforePos - collapsedBeforeNeg; 13469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderLayer* childLayer = child->layer(); 13499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childLayer->staticBlockPosition() != logicalTop) { 13509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childLayer->setStaticBlockPosition(logicalTop); 13519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (hasStaticBlockPosition) 13529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) child->setChildNeedsLayout(MarkOnlyThis); 13539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 13559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 135609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)LayoutUnit RenderBlockFlow::clearFloatsIfNeeded(RenderBox* child, MarginInfo& marginInfo, LayoutUnit oldTopPosMargin, LayoutUnit oldTopNegMargin, LayoutUnit yPos, bool childIsSelfCollapsing) 13579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 13589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit heightIncrease = getClearDelta(child, yPos); 13599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!heightIncrease) 13609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return yPos; 13619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 136209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (childIsSelfCollapsing) { 13639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool childDiscardMargin = mustDiscardMarginBeforeForChild(child) || mustDiscardMarginAfterForChild(child); 13649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // For self-collapsing blocks that clear, they can still collapse their 13669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // margins with following siblings. Reset the current margins to represent 13679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // the self-collapsing block's margins only. 13689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If DISCARD is specified for -webkit-margin-collapse, reset the margin values. 1369a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) RenderBlockFlow::MarginValues childMargins = marginValuesForChild(child); 13709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!childDiscardMargin) { 1371197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch marginInfo.setPositiveMargin(std::max(childMargins.positiveMarginBefore(), childMargins.positiveMarginAfter())); 1372197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch marginInfo.setNegativeMargin(std::max(childMargins.negativeMarginBefore(), childMargins.negativeMarginAfter())); 13739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 13749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.clearMargin(); 13759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setDiscardMargin(childDiscardMargin); 13779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // CSS2.1 states: 13799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // "If the top and bottom margins of an element with clearance are adjoining, its margins collapse with 13809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // the adjoining margins of following siblings but that resulting margin does not collapse with the bottom margin of the parent block." 138109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // So the parent's bottom margin cannot collapse through this block or any subsequent self-collapsing blocks. Set a bit to ensure 138209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // this happens; it will get reset if we encounter an in-flow sibling that is not self-collapsing. 138309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) marginInfo.setCanCollapseMarginAfterWithLastChild(false); 13849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1385a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // For now set the border-top of |child| flush with the bottom border-edge of the float so it can layout any floating or positioned children of 1386a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // its own at the correct vertical position. If subsequent siblings attempt to collapse with |child|'s margins in |collapseMargins| we will 1387a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // adjust the height of the parent to |child|'s margin top (which if it is positive sits up 'inside' the float it's clearing) so that all three 1388a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // margins can collapse at the correct vertical position. 1389a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // Per CSS2.1 we need to ensure that any negative margin-top clears |child| beyond the bottom border-edge of the float so that the top border edge of the child 1390a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // (i.e. its clearance) is at a position that satisfies the equation: "the amount of clearance is set so that clearance + margin-top = [height of float], 1391a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // i.e., clearance = [height of float] - margin-top". 1392a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) setLogicalHeight(child->logicalTop() + childMargins.negativeMarginBefore()); 13939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 13949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Increase our height by the amount we had to clear. 13959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + heightIncrease); 13969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 13979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 13989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.canCollapseWithMarginBefore()) { 13999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We can no longer collapse with the top of the block since a clear 14009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // occurred. The empty blocks collapse into the cleared block. 14019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setMaxMarginBeforeValues(oldTopPosMargin, oldTopNegMargin); 14029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setAtBeforeSideOfBlock(false); 14039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // In case the child discarded the before margin of the block we need to reset the mustDiscardMarginBefore flag to the initial value. 14059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setMustDiscardMarginBefore(style()->marginBeforeCollapse() == MDISCARD); 14069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1408a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) return yPos + heightIncrease; 14099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 14109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::setCollapsedBottomMargin(const MarginInfo& marginInfo) 14129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 14139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.canCollapseWithMarginAfter() && !marginInfo.canCollapseWithMarginBefore()) { 14149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Update the after side margin of the container to discard if the after margin of the last child also discards and we collapse with it. 14159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Don't update the max margin values because we won't need them anyway. 14169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.discardMargin()) { 14179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setMustDiscardMarginAfter(); 14189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Update our max pos/neg bottom margins, since we collapsed our bottom margins 14229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // with our children. 1423197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setMaxMarginAfterValues(std::max(maxPositiveMarginAfter(), marginInfo.positiveMargin()), std::max(maxNegativeMarginAfter(), marginInfo.negativeMargin())); 14249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.hasMarginAfterQuirk()) 14269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setHasMarginAfterQuirk(false); 14279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (marginInfo.hasMarginAfterQuirk() && !marginAfter()) { 14299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We have no bottom margin and our last child has a quirky margin. 14309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // We will pick up this quirky margin and pass it through. 14319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // This deals with the <td><div><p> case. 14329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setHasMarginAfterQuirk(true); 14339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 14369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::marginBeforeEstimateForChild(RenderBox* child, LayoutUnit& positiveMarginBefore, LayoutUnit& negativeMarginBefore, bool& discardMarginBefore) const 14389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 14399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Give up if in quirks mode and we're a body/table cell and the top margin of the child box is quirky. 14409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Give up if the child specified -webkit-margin-collapse: separate that prevents collapsing. 14419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: Use writing mode independent accessor for marginBeforeCollapse. 144207a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch if ((document().inQuirksMode() && hasMarginBeforeQuirk(child) && (isTableCell() || isBody())) || child->style()->marginBeforeCollapse() == MSEPARATE) 14439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The margins are discarded by a child that specified -webkit-margin-collapse: discard. 14469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: Use writing mode independent accessor for marginBeforeCollapse. 14479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->style()->marginBeforeCollapse() == MDISCARD) { 14489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) positiveMarginBefore = 0; 14499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) negativeMarginBefore = 0; 14509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) discardMarginBefore = true; 14519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit beforeChildMargin = marginBeforeForChild(child); 1455197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch positiveMarginBefore = std::max(positiveMarginBefore, beforeChildMargin); 1456197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch negativeMarginBefore = std::max(negativeMarginBefore, -beforeChildMargin); 14579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isRenderBlockFlow()) 14599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBlockFlow* childBlockFlow = toRenderBlockFlow(child); 14629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (childBlockFlow->childrenInline() || childBlockFlow->isWritingModeRoot()) 14639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) MarginInfo childMarginInfo(childBlockFlow, childBlockFlow->borderBefore() + childBlockFlow->paddingBefore(), childBlockFlow->borderAfter() + childBlockFlow->paddingAfter()); 14669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!childMarginInfo.canCollapseMarginBeforeWithChildren()) 14679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBox* grandchildBox = childBlockFlow->firstChildBox(); 14709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) for ( ; grandchildBox; grandchildBox = grandchildBox->nextSiblingBox()) { 14719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!grandchildBox->isFloatingOrOutOfFlowPositioned()) 14729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) break; 14739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Give up if there is clearance on the box, since it probably won't collapse into us. 14769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!grandchildBox || grandchildBox->style()->clear() != CNONE) 14779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 14789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Make sure to update the block margins now for the grandchild box so that we're looking at current values. 14809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (grandchildBox->needsLayout()) { 14819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) grandchildBox->computeAndSetBlockDirectionMargins(this); 14829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (grandchildBox->isRenderBlock()) { 14839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBlock* grandchildBlock = toRenderBlock(grandchildBox); 14849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) grandchildBlock->setHasMarginBeforeQuirk(grandchildBox->style()->hasMarginBeforeQuirk()); 14859bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) grandchildBlock->setHasMarginAfterQuirk(grandchildBox->style()->hasMarginAfterQuirk()); 14869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 14889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Collapse the margin of the grandchild box with our own to produce an estimate. 14909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) childBlockFlow->marginBeforeEstimateForChild(grandchildBox, positiveMarginBefore, negativeMarginBefore, discardMarginBefore); 14919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 14929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 14939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)LayoutUnit RenderBlockFlow::estimateLogicalTopPosition(RenderBox* child, const MarginInfo& marginInfo, LayoutUnit& estimateWithoutPagination) 14949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 14959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: We need to eliminate the estimation of vertical position, because when it's wrong we sometimes trigger a pathological 14969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // relayout if there are intruding floats. 14979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit logicalTopEstimate = logicalHeight(); 14989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.canCollapseWithMarginBefore()) { 14999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit positiveMarginBefore = 0; 15009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit negativeMarginBefore = 0; 15019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) bool discardMarginBefore = false; 15029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->selfNeedsLayout()) { 15039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Try to do a basic estimation of how the collapse is going to go. 15049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginBeforeEstimateForChild(child, positiveMarginBefore, negativeMarginBefore, discardMarginBefore); 15059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } else { 15069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Use the cached collapsed margin values from a previous layout. Most of the time they 15079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // will be right. 15089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderBlockFlow::MarginValues marginValues = marginValuesForChild(child); 1509197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch positiveMarginBefore = std::max(positiveMarginBefore, marginValues.positiveMarginBefore()); 1510197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch negativeMarginBefore = std::max(negativeMarginBefore, marginValues.negativeMarginBefore()); 15119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) discardMarginBefore = mustDiscardMarginBeforeForChild(child); 15129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 15139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Collapse the result with our current margins. 15159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!discardMarginBefore) 1516197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTopEstimate += std::max(marginInfo.positiveMargin(), positiveMarginBefore) - std::max(marginInfo.negativeMargin(), negativeMarginBefore); 15179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 15189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Adjust logicalTopEstimate down to the next page if the margins are so large that we don't fit on the current 15209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // page. 15219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutState* layoutState = view()->layoutState(); 152209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (layoutState->isPaginated() && layoutState->pageLogicalHeight() && logicalTopEstimate > logicalHeight()) 1523197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTopEstimate = std::min(logicalTopEstimate, nextPageLogicalTop(logicalHeight())); 15249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTopEstimate += getClearDelta(child, logicalTopEstimate); 15269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) estimateWithoutPagination = logicalTopEstimate; 15289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15299bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (layoutState->isPaginated()) { 15309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If the object has a page or column break value of "before", then we should shift to the top of the next page. 15319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTopEstimate = applyBeforeBreak(child, logicalTopEstimate); 15329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // For replaced elements and scrolled elements, we want to shift them to the next page if they don't fit on the current one. 15349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) logicalTopEstimate = adjustForUnsplittableChild(child, logicalTopEstimate); 15359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1536197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (!child->selfNeedsLayout() && child->isRenderBlockFlow()) 1537197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTopEstimate += toRenderBlockFlow(child)->paginationStrut(); 15389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 15399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return logicalTopEstimate; 15419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 15429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1543a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)LayoutUnit RenderBlockFlow::marginOffsetForSelfCollapsingBlock() 1544a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles){ 1545a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) ASSERT(isSelfCollapsingBlock()); 1546a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) RenderBlockFlow* parentBlock = toRenderBlockFlow(parent()); 1547a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (parentBlock && style()->clear() && parentBlock->getClearDelta(this, logicalHeight())) 1548a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) return marginValuesForChild(this).positiveMarginBefore(); 1549a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) return LayoutUnit(); 1550a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)} 1551a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 15529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::adjustFloatingBlock(const MarginInfo& marginInfo) 15539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 15549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // The float should be positioned taking into account the bottom margin 15559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // of the previous flow. We add that margin into the height, get the 15569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // float positioned properly, and then subtract the margin out of the 15579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // height again. In the case of self-collapsing blocks, we always just 15589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // use the top margins, since the self-collapsing block collapsed its 15599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // own bottom margin into its top margin. 15609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // 15619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Note also that the previous flow may collapse its margin into the top of 15629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // our block. If this is the case, then we do not add the margin in to our 15639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // height when computing the position of the float. This condition can be tested 15649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // for by simply calling canCollapseWithMarginBefore. See 15659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // http://www.hixie.ch/tests/adhoc/css/box/block/margin-collapse/046.html for 15669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // an example of this scenario. 15679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit marginOffset = marginInfo.canCollapseWithMarginBefore() ? LayoutUnit() : marginInfo.margin(); 15689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + marginOffset); 15699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) positionNewFloats(); 15709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() - marginOffset); 15719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 15729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 157309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)void RenderBlockFlow::handleAfterSideOfBlock(RenderBox* lastChild, LayoutUnit beforeSide, LayoutUnit afterSide, MarginInfo& marginInfo) 15749bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 15759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.setAtAfterSideOfBlock(true); 15769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1577a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // If our last child was a self-collapsing block with clearance then our logical height is flush with the 1578a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // bottom edge of the float that the child clears. The correct vertical position for the margin-collapsing we want 1579a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // to perform now is at the child's margin-top - so adjust our height to that position. 158009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (lastChild && lastChild->isRenderBlockFlow() && lastChild->isSelfCollapsingBlock()) 158109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setLogicalHeight(logicalHeight() - toRenderBlockFlow(lastChild)->marginOffsetForSelfCollapsingBlock()); 158209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 158309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (marginInfo.canCollapseMarginAfterWithChildren() && !marginInfo.canCollapseMarginAfterWithLastChild()) 158409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) marginInfo.setCanCollapseMarginAfterWithChildren(false); 1585a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 15869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If we can't collapse with children then go ahead and add in the bottom margin. 15879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!marginInfo.discardMargin() && (!marginInfo.canCollapseWithMarginAfter() && !marginInfo.canCollapseWithMarginBefore() 15889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) && (!document().inQuirksMode() || !marginInfo.quirkContainer() || !marginInfo.hasMarginAfterQuirk()))) 15899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + marginInfo.margin()); 15909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Now add in our bottom border/padding. 15929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setLogicalHeight(logicalHeight() + afterSide); 15939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Negative margins can cause our height to shrink below our minimal height (border/padding). 15959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // If this happens, ensure that the computed height is increased to the minimal height. 1596197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setLogicalHeight(std::max(logicalHeight(), beforeSide + afterSide)); 15979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 15989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // Update our bottom collapsed margin info. 15999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) setCollapsedBottomMargin(marginInfo); 16009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::setMustDiscardMarginBefore(bool value) 16039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (style()->marginBeforeCollapse() == MDISCARD) { 16059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(value); 16069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 16079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 16089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData && !value) 16109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 16119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData) 1613e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 16149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_discardMarginBefore = value; 16169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::setMustDiscardMarginAfter(bool value) 16199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (style()->marginAfterCollapse() == MDISCARD) { 16219bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(value); 16229bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 16239bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 16249bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16259bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData && !value) 16269bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 16279bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16289bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData) 1629e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 16309bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16319bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_discardMarginAfter = value; 16329bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16339bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16349bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustDiscardMarginBefore() const 16359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return style()->marginBeforeCollapse() == MDISCARD || (m_rareData && m_rareData->m_discardMarginBefore); 16379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustDiscardMarginAfter() const 16409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return style()->marginAfterCollapse() == MDISCARD || (m_rareData && m_rareData->m_discardMarginAfter); 16429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustDiscardMarginBeforeForChild(const RenderBox* child) const 16459bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16469bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!child->selfNeedsLayout()); 16479bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) 16489bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return child->isRenderBlockFlow() ? toRenderBlockFlow(child)->mustDiscardMarginBefore() : (child->style()->marginBeforeCollapse() == MDISCARD); 16499bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->isHorizontalWritingMode() == isHorizontalWritingMode()) 16509bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return child->isRenderBlockFlow() ? toRenderBlockFlow(child)->mustDiscardMarginAfter() : (child->style()->marginAfterCollapse() == MDISCARD); 16519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: We return false here because the implementation is not geometrically complete. We have values only for before/after, not start/end. 16539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // In case the boxes are perpendicular we assume the property is not specified. 16549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return false; 16559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16569bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16579bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustDiscardMarginAfterForChild(const RenderBox* child) const 16589bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16599bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!child->selfNeedsLayout()); 16609bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) 16619bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return child->isRenderBlockFlow() ? toRenderBlockFlow(child)->mustDiscardMarginAfter() : (child->style()->marginAfterCollapse() == MDISCARD); 16629bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->isHorizontalWritingMode() == isHorizontalWritingMode()) 16639bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return child->isRenderBlockFlow() ? toRenderBlockFlow(child)->mustDiscardMarginBefore() : (child->style()->marginBeforeCollapse() == MDISCARD); 16649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: See |mustDiscardMarginBeforeForChild| above. 16669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return false; 16679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::setMaxMarginBeforeValues(LayoutUnit pos, LayoutUnit neg) 16709bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16719bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData) { 16729bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (pos == RenderBlockFlowRareData::positiveMarginBeforeDefault(this) && neg == RenderBlockFlowRareData::negativeMarginBeforeDefault(this)) 16739bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 1674e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 16759bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 16769bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_margins.setPositiveMarginBefore(pos); 16779bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_margins.setNegativeMarginBefore(neg); 16789bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16799bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16809bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)void RenderBlockFlow::setMaxMarginAfterValues(LayoutUnit pos, LayoutUnit neg) 16819bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16829bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!m_rareData) { 16839bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (pos == RenderBlockFlowRareData::positiveMarginAfterDefault(this) && neg == RenderBlockFlowRareData::negativeMarginAfterDefault(this)) 16849bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return; 1685e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 16869bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 16879bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_margins.setPositiveMarginAfter(pos); 16889bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) m_rareData->m_margins.setNegativeMarginAfter(neg); 16899bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 16909bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 16919bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustSeparateMarginBeforeForChild(const RenderBox* child) const 16929bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 16939bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!child->selfNeedsLayout()); 16949bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) const RenderStyle* childStyle = child->style(); 16959bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) 16969bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return childStyle->marginBeforeCollapse() == MSEPARATE; 16979bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->isHorizontalWritingMode() == isHorizontalWritingMode()) 16989bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return childStyle->marginAfterCollapse() == MSEPARATE; 16999bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17009bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: See |mustDiscardMarginBeforeForChild| above. 17019bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return false; 17029bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 17039bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17049bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)bool RenderBlockFlow::mustSeparateMarginAfterForChild(const RenderBox* child) const 17059bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 17069bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) ASSERT(!child->selfNeedsLayout()); 17079bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) const RenderStyle* childStyle = child->style(); 17089bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (!child->isWritingModeRoot()) 17099bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return childStyle->marginAfterCollapse() == MSEPARATE; 17109bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) if (child->isHorizontalWritingMode() == isHorizontalWritingMode()) 17119bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return childStyle->marginBeforeCollapse() == MSEPARATE; 17129bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17139bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: See |mustDiscardMarginBeforeForChild| above. 17149bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return false; 17159bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 17169bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17179bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)LayoutUnit RenderBlockFlow::applyBeforeBreak(RenderBox* child, LayoutUnit logicalOffset) 17189bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 17199bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: Add page break checking here when we support printing. 17209bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderFlowThread* flowThread = flowThreadContainingBlock(); 172109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool isInsideMulticolFlowThread = flowThread; 172209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool checkColumnBreaks = isInsideMulticolFlowThread || view()->layoutState()->isPaginatingColumns(); 172307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight(); // FIXME: Once columns can print we have to check this. 172409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool checkBeforeAlways = (checkColumnBreaks && child->style()->columnBreakBefore() == PBALWAYS) 172509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) || (checkPageBreaks && child->style()->pageBreakBefore() == PBALWAYS); 172609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (checkBeforeAlways && inNormalFlow(child)) { 172709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (checkColumnBreaks) { 172809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (isInsideMulticolFlowThread) { 172909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit offsetBreakAdjustment = 0; 173009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (flowThread->addForcedRegionBreak(offsetFromLogicalTopOfFirstPage() + logicalOffset, child, true, &offsetBreakAdjustment)) 173109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return logicalOffset + offsetBreakAdjustment; 173209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else { 1733d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) view()->layoutState()->addForcedColumnBreak(*child, logicalOffset); 173409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 17359bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 17369bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return nextPageLogicalTop(logicalOffset, IncludePageBoundary); 17379bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 17389bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return logicalOffset; 17399bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 17409bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17419bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)LayoutUnit RenderBlockFlow::applyAfterBreak(RenderBox* child, LayoutUnit logicalOffset, MarginInfo& marginInfo) 17429bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles){ 17439bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // FIXME: Add page break checking here when we support printing. 17449bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) RenderFlowThread* flowThread = flowThreadContainingBlock(); 174509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool isInsideMulticolFlowThread = flowThread; 174609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool checkColumnBreaks = isInsideMulticolFlowThread || view()->layoutState()->isPaginatingColumns(); 174707a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight(); // FIXME: Once columns can print we have to check this. 174809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) bool checkAfterAlways = (checkColumnBreaks && child->style()->columnBreakAfter() == PBALWAYS) 174909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) || (checkPageBreaks && child->style()->pageBreakAfter() == PBALWAYS); 175009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (checkAfterAlways && inNormalFlow(child)) { 17519bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) LayoutUnit marginOffset = marginInfo.canCollapseWithMarginBefore() ? LayoutUnit() : marginInfo.margin(); 17529bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 17539bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) // So our margin doesn't participate in the next collapsing steps. 17549bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) marginInfo.clearMargin(); 17559bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 175609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (checkColumnBreaks) { 175709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (isInsideMulticolFlowThread) { 175809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit offsetBreakAdjustment = 0; 175909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (flowThread->addForcedRegionBreak(offsetFromLogicalTopOfFirstPage() + logicalOffset + marginOffset, child, false, &offsetBreakAdjustment)) 176009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return logicalOffset + marginOffset + offsetBreakAdjustment; 176109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } else { 1762d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) view()->layoutState()->addForcedColumnBreak(*child, logicalOffset); 176309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 17649bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 17659bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return nextPageLogicalTop(logicalOffset, IncludePageBoundary); 17669bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) } 17679bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) return logicalOffset; 17689bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles)} 17699bbd2f5e390b01907d97ecffde80aa1b06113aacTorne (Richard Coles) 1770f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::addOverflowFromFloats() 1771f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1772f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 1773f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 1774f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1775f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 1776f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 1777f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 1778d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 1779f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->isDescendant()) 1780f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) addOverflowFromChild(floatingObject->renderer(), IntSize(xPositionForFloatIncludingMargin(floatingObject), yPositionForFloatIncludingMargin(floatingObject))); 1781f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1782f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1783f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1784f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats) 1785f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1786f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlock::computeOverflow(oldClientAfterEdge, recomputeFloats); 178709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (!hasColumns() && (recomputeFloats || createsBlockFormattingContext() || hasSelfPaintingLayer())) 1788f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) addOverflowFromFloats(); 1789f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1790f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 179109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)RootInlineBox* RenderBlockFlow::createAndAppendRootInlineBox() 179209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 179309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) RootInlineBox* rootBox = createRootInlineBox(); 179409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_lineBoxes.appendLineBox(rootBox); 179509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 179609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return rootBox; 179709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 179809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 1799f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::deleteLineBoxTree() 1800f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1801f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (containsFloats()) 1802f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->clearLineBoxTreePointers(); 1803c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 1804c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) m_lineBoxes.deleteLineBoxTree(); 1805f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1806f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1807f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::markAllDescendantsWithFloatsForLayout(RenderBox* floatToRemove, bool inLayout) 1808f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1809f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!everHadLayout() && !containsFloats()) 1810f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 1811f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1812197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (m_descendantsWithFloatsMarkedForLayout && !floatToRemove) 1813197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return; 1814197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch m_descendantsWithFloatsMarkedForLayout |= !floatToRemove; 1815197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 1816f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) MarkingBehavior markParents = inLayout ? MarkOnlyThis : MarkContainingBlockChain; 1817f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setChildNeedsLayout(markParents); 1818f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1819f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatToRemove) 1820f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) removeFloatingObject(floatToRemove); 1821f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1822f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Iterate over our children and mark them as needed. 1823f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!childrenInline()) { 1824f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (RenderObject* child = firstChild(); child; child = child->nextSibling()) { 1825f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if ((!floatToRemove && child->isFloatingOrOutOfFlowPositioned()) || !child->isRenderBlock()) 1826f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 1827f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!child->isRenderBlockFlow()) { 1828f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlock* childBlock = toRenderBlock(child); 1829f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childBlock->shrinkToAvoidFloats() && childBlock->everHadLayout()) 1830f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childBlock->setChildNeedsLayout(markParents); 1831f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 1832f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1833f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* childBlockFlow = toRenderBlockFlow(child); 1834f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if ((floatToRemove ? childBlockFlow->containsFloat(floatToRemove) : childBlockFlow->containsFloats()) || childBlockFlow->shrinkToAvoidFloats()) 1835f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childBlockFlow->markAllDescendantsWithFloatsForLayout(floatToRemove, inLayout); 1836f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1837f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1838f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1839f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1840f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::markSiblingsWithFloatsForLayout(RenderBox* floatToRemove) 1841f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1842f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 1843f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 1844f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1845f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 1846f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 1847f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1848f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (RenderObject* next = nextSibling(); next; next = next->nextSibling()) { 1849c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!next->isRenderBlockFlow() || next->isFloatingOrOutOfFlowPositioned() || toRenderBlockFlow(next)->avoidsFloats()) 1850f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 1851f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1852f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* nextBlock = toRenderBlockFlow(next); 1853f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 1854f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBox* floatingBox = (*it)->renderer(); 1855f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatToRemove && floatingBox != floatToRemove) 1856f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 1857f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (nextBlock->containsFloat(floatingBox)) 1858f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) nextBlock->markAllDescendantsWithFloatsForLayout(floatingBox); 1859f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1860f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1861f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1862f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1863f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)LayoutUnit RenderBlockFlow::getClearDelta(RenderBox* child, LayoutUnit logicalTop) 1864f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1865f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // There is no need to compute clearance if we have no floats. 1866f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!containsFloats()) 1867f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return 0; 1868f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1869f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // At least one float is present. We need to perform the clearance computation. 1870f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool clearSet = child->style()->clear() != CNONE; 1871f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalBottom = 0; 1872f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) switch (child->style()->clear()) { 1873f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CNONE: 1874f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1875f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CLEFT: 1876f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) logicalBottom = lowestFloatLogicalBottom(FloatingObject::FloatLeft); 1877f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1878f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CRIGHT: 1879f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) logicalBottom = lowestFloatLogicalBottom(FloatingObject::FloatRight); 1880f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1881f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CBOTH: 1882f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) logicalBottom = lowestFloatLogicalBottom(); 1883f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1884f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1885f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1886f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // We also clear floats if we are too big to sit on the same line as a float (and wish to avoid floats by default). 1887197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit result = clearSet ? std::max<LayoutUnit>(0, logicalBottom - logicalTop) : LayoutUnit(); 1888f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!result && child->avoidsFloats()) { 1889f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit newLogicalTop = logicalTop; 1890f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) while (true) { 1891f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit availableLogicalWidthAtNewLogicalTopOffset = availableLogicalWidthForLine(newLogicalTop, false, logicalHeightForChild(child)); 189209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (availableLogicalWidthAtNewLogicalTopOffset == availableLogicalWidthForContent()) 1893f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return newLogicalTop - logicalTop; 1894f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 189509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutRect borderBox = child->borderBoxRect(); 1896f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childLogicalWidthAtOldLogicalTopOffset = isHorizontalWritingMode() ? borderBox.width() : borderBox.height(); 1897f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1898f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // FIXME: None of this is right for perpendicular writing-mode children. 1899f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childOldLogicalWidth = child->logicalWidth(); 1900f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childOldMarginLeft = child->marginLeft(); 1901f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childOldMarginRight = child->marginRight(); 1902f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childOldLogicalTop = child->logicalTop(); 1903f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1904f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setLogicalTop(newLogicalTop); 1905f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->updateLogicalWidth(); 190609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) borderBox = child->borderBoxRect(); 1907f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childLogicalWidthAtNewLogicalTopOffset = isHorizontalWritingMode() ? borderBox.width() : borderBox.height(); 1908f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1909f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setLogicalTop(childOldLogicalTop); 1910f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setLogicalWidth(childOldLogicalWidth); 1911f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setMarginLeft(childOldMarginLeft); 1912f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setMarginRight(childOldMarginRight); 1913f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1914f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childLogicalWidthAtNewLogicalTopOffset <= availableLogicalWidthAtNewLogicalTopOffset) { 1915f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Even though we may not be moving, if the logical width did shrink because of the presence of new floats, then 1916f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // we need to force a relayout as though we shifted. This happens because of the dynamic addition of overhanging floats 1917f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // from previous siblings when negative margins exist on a child (see the addOverhangingFloats call at the end of collapseMargins). 1918f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childLogicalWidthAtOldLogicalTopOffset != childLogicalWidthAtNewLogicalTopOffset) 1919f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->setChildNeedsLayout(MarkOnlyThis); 1920f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return newLogicalTop - logicalTop; 1921f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1922f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1923f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) newLogicalTop = nextFloatLogicalBottomBelow(newLogicalTop); 1924f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ASSERT(newLogicalTop >= logicalTop); 1925f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (newLogicalTop < logicalTop) 1926f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1927f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1928f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ASSERT_NOT_REACHED(); 1929f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1930f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return result; 1931f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1932f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1933f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::createFloatingObjects() 1934f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1935f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects = adoptPtr(new FloatingObjects(this, isHorizontalWritingMode())); 1936f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1937f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1938aafa69cb17c9d6606c07663ade5f81388a2c5986Ben Murdochvoid RenderBlockFlow::styleWillChange(StyleDifference diff, const RenderStyle& newStyle) 1939f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1940f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderStyle* oldStyle = style(); 1941197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch s_canPropagateFloatIntoSibling = oldStyle ? !isFloatingOrOutOfFlowPositioned() && !avoidsFloats() : false; 194210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (oldStyle && parent() && diff.needsFullLayout() && oldStyle->position() != newStyle.position() 1943aafa69cb17c9d6606c07663ade5f81388a2c5986Ben Murdoch && containsFloats() && !isFloating() && !isOutOfFlowPositioned() && newStyle.hasOutOfFlowPosition()) 1944f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) markAllDescendantsWithFloatsForLayout(); 1945f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1946f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlock::styleWillChange(diff, newStyle); 1947f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1948f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1949f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 1950f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 1951f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlock::styleDidChange(diff, oldStyle); 1952f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1953f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // After our style changed, if we lose our ability to propagate floats into next sibling 1954f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // blocks, then we need to find the top most parent containing that overhanging float and 1955f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // then mark its descendants with floats for layout and clear all floats from its next 1956f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // sibling blocks that exist in our floating objects list. See bug 56299 and 62875. 1957197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch bool canPropagateFloatIntoSibling = !isFloatingOrOutOfFlowPositioned() && !avoidsFloats(); 195810f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (diff.needsFullLayout() && s_canPropagateFloatIntoSibling && !canPropagateFloatIntoSibling && hasOverhangingFloats()) { 1959f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* parentBlockFlow = this; 1960f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 1961f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 1962f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1963f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (RenderObject* curr = parent(); curr && !curr->isRenderView(); curr = curr->parent()) { 1964f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (curr->isRenderBlockFlow()) { 1965f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* currBlock = toRenderBlockFlow(curr); 1966f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1967f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (currBlock->hasOverhangingFloats()) { 1968f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 1969f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBox* renderer = (*it)->renderer(); 1970f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (currBlock->hasOverhangingFloat(renderer)) { 1971f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) parentBlockFlow = currBlock; 1972f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 1973f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1974f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1975f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1976f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1977f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1978f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1979f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) parentBlockFlow->markAllDescendantsWithFloatsForLayout(); 1980f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) parentBlockFlow->markSiblingsWithFloatsForLayout(); 1981f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 1982d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 198310f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch if (diff.needsFullLayout() || !oldStyle) 1984197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch createOrDestroyMultiColumnFlowThreadIfNeeded(oldStyle); 198551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 198651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 198751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)void RenderBlockFlow::updateStaticInlinePositionForChild(RenderBox* child, LayoutUnit logicalTop) 198851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 198951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (child->style()->isOriginalDisplayInlineType()) 1990197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setStaticInlinePositionForChild(child, startAlignedOffsetForLine(logicalTop, false)); 199151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) else 1992197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch setStaticInlinePositionForChild(child, startOffsetForContent()); 199351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 199451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 1995197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::setStaticInlinePositionForChild(RenderBox* child, LayoutUnit inlinePosition) 199651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 199751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) child->layer()->setStaticInlinePosition(inlinePosition); 1998f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 1999f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2000d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)void RenderBlockFlow::addChild(RenderObject* newChild, RenderObject* beforeChild) 2001d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 2002d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) if (RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread()) { 2003d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) flowThread->addChild(newChild, beforeChild); 2004d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) return; 2005d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) } 2006d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) RenderBlock::addChild(newChild, beforeChild); 2007d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 2008d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 2009f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::moveAllChildrenIncludingFloatsTo(RenderBlock* toBlock, bool fullRemoveInsert) 2010f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2011f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBlockFlow* toBlockFlow = toRenderBlockFlow(toBlock); 2012f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) moveAllChildrenTo(toBlockFlow, fullRemoveInsert); 2013f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2014f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // When a portion of the render tree is being detached, anonymous blocks 2015f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // will be combined as their children are deleted. In this process, the 2016f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // anonymous block later in the tree is merged into the one preceeding it. 2017f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // It can happen that the later block (this) contains floats that the 2018f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // previous block (toBlockFlow) did not contain, and thus are not in the 2019f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // floating objects list for toBlockFlow. This can result in toBlockFlow containing 2020f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // floats that are not in it's floating objects list, but are in the 2021f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // floating objects lists of siblings and parents. This can cause problems 2022f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // when the float itself is deleted, since the deletion code assumes that 2023f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // if a float is not in it's containing block's floating objects list, it 2024f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // isn't in any floating objects list. In order to preserve this condition 2025f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // (removing it has serious performance implications), we need to copy the 2026f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // floating objects from the old block (this) to the new block (toBlockFlow). 2027f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // The float's metrics will likely all be wrong, but since toBlockFlow is 2028f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // already marked for layout, this will get fixed before anything gets 2029f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // displayed. 2030f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // See bug https://code.google.com/p/chromium/issues/detail?id=230907 2031f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (m_floatingObjects) { 2032f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!toBlockFlow->m_floatingObjects) 2033f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) toBlockFlow->createFloatingObjects(); 2034f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2035f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& fromFloatingObjectSet = m_floatingObjects->set(); 2036f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = fromFloatingObjectSet.end(); 2037f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2038f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = fromFloatingObjectSet.begin(); it != end; ++it) { 2039d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2040f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2041f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Don't insert the object again if it's already in the list 2042f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (toBlockFlow->containsFloat(floatingObject->renderer())) 2043f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 2044f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2045f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) toBlockFlow->m_floatingObjects->add(floatingObject->unsafeClone()); 2046f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2047f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2048f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2049f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2050f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2051197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::invalidatePaintForOverhangingFloats(bool paintAllDescendants) 2052f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 20539e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // Invalidate paint of any overhanging floats (if we know we're the one to paint them). 2054f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Otherwise, bail out. 2055f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!hasOverhangingFloats()) 2056f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 2057f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2058f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2059f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 2060f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 2061d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 20629e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // Only issue paint invaldiations for the object if it is overhanging, is not in its own layer, and 2063f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // is our responsibility to paint (m_shouldPaint is set). When paintAllDescendants is true, the latter 2064f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // condition is replaced with being a descendant of us. 2065f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (logicalBottomForFloat(floatingObject) > logicalHeight() 2066f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) && !floatingObject->renderer()->hasSelfPaintingLayer() 2067f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) && (floatingObject->shouldPaint() || (paintAllDescendants && floatingObject->renderer()->isDescendantOf(this)))) { 2068a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 2069a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) RenderBox* floatingRenderer = floatingObject->renderer(); 2070197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch floatingRenderer->setShouldDoFullPaintInvalidation(true); 2071197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch floatingRenderer->invalidatePaintForOverhangingFloats(false); 2072f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2073f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2074f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2075f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 20765d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)void RenderBlockFlow::invalidatePaintForOverflow() 2077a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles){ 2078a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // FIXME: We could tighten up the left and right invalidation points if we let layoutInlineChildren fill them in based off the particular lines 2079a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // it had to lay out. We wouldn't need the hasOverflowClip() hack in that case either. 20809e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) LayoutUnit paintInvalidationLogicalLeft = logicalLeftVisualOverflow(); 20819e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) LayoutUnit paintInvalidationLogicalRight = logicalRightVisualOverflow(); 2082a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (hasOverflowClip()) { 2083a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // If we have clipped overflow, we should use layout overflow as well, since visual overflow from lines didn't propagate to our block's overflow. 2084a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // Note the old code did this as well but even for overflow:visible. The addition of hasOverflowClip() at least tightens up the hack a bit. 20859e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // layoutInlineChildren should be patched to compute the entire paint invalidation rect. 20869e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationLogicalLeft = std::min(paintInvalidationLogicalLeft, logicalLeftLayoutOverflow()); 20879e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationLogicalRight = std::max(paintInvalidationLogicalRight, logicalRightLayoutOverflow()); 2088a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 2089a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 20909e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) LayoutRect paintInvalidationRect; 2091a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (isHorizontalWritingMode()) 20929e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationRect = LayoutRect(paintInvalidationLogicalLeft, m_paintInvalidationLogicalTop, paintInvalidationLogicalRight - paintInvalidationLogicalLeft, m_paintInvalidationLogicalBottom - m_paintInvalidationLogicalTop); 2093a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) else 20949e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationRect = LayoutRect(m_paintInvalidationLogicalTop, paintInvalidationLogicalLeft, m_paintInvalidationLogicalBottom - m_paintInvalidationLogicalTop, paintInvalidationLogicalRight - paintInvalidationLogicalLeft); 2095a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 20969e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // The paint invalidation rect may be split across columns, in which case adjustRectForColumns() will return the union. 20979e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) adjustRectForColumns(paintInvalidationRect); 2098a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 2099a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (hasOverflowClip()) { 21009e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) // Adjust the paint invalidation rect for scroll offset 21019e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationRect.move(-scrolledContentOffset()); 2102a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 2103a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // Don't allow this rect to spill out of our overflow box. 21049e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) paintInvalidationRect.intersect(LayoutRect(LayoutPoint(), size())); 2105a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 2106a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 2107a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) // Make sure the rect is still non-empty after intersecting for overflow above 21089e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) if (!paintInvalidationRect.isEmpty()) { 2109d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) // Hits in media/event-attributes.html 2110d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) DisableCompositingQueryAsserts disabler; 2111d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 21129e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) invalidatePaintRectangle(paintInvalidationRect); // We need to do a partial paint invalidation of our content. 2113a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) if (hasReflection()) 21149e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) invalidatePaintRectangle(reflectedRect(paintInvalidationRect)); 2115a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) } 2116a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 21179e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) m_paintInvalidationLogicalTop = 0; 21189e12abdf8c3a23d52091ea54ebb6a04d327f9300Torne (Richard Coles) m_paintInvalidationLogicalBottom = 0; 2119a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)} 2120a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) 2121f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::paintFloats(PaintInfo& paintInfo, const LayoutPoint& paintOffset, bool preservePhase) 2122f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 21237242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci BlockFlowPainter(*this).paintFloats(paintInfo, paintOffset, preservePhase); 2124f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2125f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 21267242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tuccivoid RenderBlockFlow::clipOutFloatingObjects(const RenderBlock* rootBlock, const PaintInfo* paintInfo, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock) const 2127f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2128f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (m_floatingObjects) { 2129f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2130f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 2131f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 2132d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2133f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutRect floatBox(offsetFromRootBlock.width() + xPositionForFloatIncludingMargin(floatingObject), 2134f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) offsetFromRootBlock.height() + yPositionForFloatIncludingMargin(floatingObject), 2135f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->renderer()->width(), floatingObject->renderer()->height()); 2136f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) rootBlock->flipForWritingMode(floatBox); 2137f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatBox.move(rootBlockPhysicalPosition.x(), rootBlockPhysicalPosition.y()); 2138f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) paintInfo->context->clipOut(pixelSnappedIntRect(floatBox)); 2139f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2140f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2141f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2142f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2143f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::clearFloats(EClear clear) 2144f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2145f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) positionNewFloats(); 2146f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // set y position 2147f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit newY = 0; 2148f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) switch (clear) { 2149f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CLEFT: 2150f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) newY = lowestFloatLogicalBottom(FloatingObject::FloatLeft); 2151f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 2152f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CRIGHT: 2153f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) newY = lowestFloatLogicalBottom(FloatingObject::FloatRight); 2154f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 2155f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) case CBOTH: 2156f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) newY = lowestFloatLogicalBottom(); 2157f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) default: 2158f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 2159f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2160f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (height() < newY) 2161f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalHeight(newY); 2162f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2163f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2164f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)bool RenderBlockFlow::containsFloat(RenderBox* renderer) const 2165f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 216651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return m_floatingObjects && m_floatingObjects->set().contains<FloatingObjectHashTranslator>(renderer); 2167f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2168f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2169f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::removeFloatingObjects() 2170f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2171f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2172f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 2173f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 217407a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch markSiblingsWithFloatsForLayout(); 217507a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch 2176f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->clear(); 2177f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2178f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2179f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)LayoutPoint RenderBlockFlow::flipFloatForWritingModeForChild(const FloatingObject* child, const LayoutPoint& point) const 2180f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2181f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!style()->isFlippedBlocksWritingMode()) 2182f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return point; 2183f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2184f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // This is similar to RenderBox::flipForWritingModeForChild. We have to subtract out our left/top offsets twice, since 2185f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // it's going to get added back in. We hide this complication here so that the calling code looks normal for the unflipped 2186f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // case. 2187f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (isHorizontalWritingMode()) 2188f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return LayoutPoint(point.x(), point.y() + height() - child->renderer()->height() - 2 * yPositionForFloatIncludingMargin(child)); 2189f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return LayoutPoint(point.x() + width() - child->renderer()->width() - 2 * xPositionForFloatIncludingMargin(child), point.y()); 2190f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2191f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 219251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)LayoutUnit RenderBlockFlow::logicalLeftOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining) const 219351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 219451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutUnit offset = fixedOffset; 219551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (m_floatingObjects && m_floatingObjects->hasLeftObjects()) 219651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) offset = m_floatingObjects->logicalLeftOffsetForPositioningFloat(fixedOffset, logicalTop, heightRemaining); 219751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return adjustLogicalLeftOffsetForLine(offset, applyTextIndent); 219851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 219951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 220051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)LayoutUnit RenderBlockFlow::logicalRightOffsetForPositioningFloat(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining) const 220151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 220251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutUnit offset = fixedOffset; 220351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (m_floatingObjects && m_floatingObjects->hasRightObjects()) 220451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) offset = m_floatingObjects->logicalRightOffsetForPositioningFloat(fixedOffset, logicalTop, heightRemaining); 220551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return adjustLogicalRightOffsetForLine(offset, applyTextIndent); 220651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 220751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 220809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)LayoutUnit RenderBlockFlow::adjustLogicalLeftOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const 220909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 221009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit left = offsetFromFloats; 221109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 221209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (applyTextIndent && style()->isLeftToRightDirection()) 221309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) left += textIndentOffset(); 221409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 221509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return left; 221609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 221709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 221809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)LayoutUnit RenderBlockFlow::adjustLogicalRightOffsetForLine(LayoutUnit offsetFromFloats, bool applyTextIndent) const 221909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 222009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit right = offsetFromFloats; 222109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 222209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (applyTextIndent && !style()->isLeftToRightDirection()) 222309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) right -= textIndentOffset(); 222409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 222509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return right; 222609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 222709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 2228f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)LayoutPoint RenderBlockFlow::computeLogicalLocationForFloat(const FloatingObject* floatingObject, LayoutUnit logicalTopOffset) const 2229f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2230f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBox* childBox = floatingObject->renderer(); 223109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit logicalLeftOffset = logicalLeftOffsetForContent(); // Constant part of left offset. 2232f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalRightOffset; // Constant part of right offset. 223307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch logicalRightOffset = logicalRightOffsetForContent(); 2234f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2235197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit floatLogicalWidth = std::min(logicalWidthForFloat(floatingObject), logicalRightOffset - logicalLeftOffset); // The width we look for. 2236f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2237f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit floatLogicalLeft; 2238f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2239f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool insideFlowThread = flowThreadContainingBlock(); 2240f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2241f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childBox->style()->floating() == LeftFloat) { 2242f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit heightRemainingLeft = 1; 2243f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit heightRemainingRight = 1; 224451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) floatLogicalLeft = logicalLeftOffsetForPositioningFloat(logicalTopOffset, logicalLeftOffset, false, &heightRemainingLeft); 224551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) while (logicalRightOffsetForPositioningFloat(logicalTopOffset, logicalRightOffset, false, &heightRemainingRight) - floatLogicalLeft < floatLogicalWidth) { 2246197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTopOffset += std::min(heightRemainingLeft, heightRemainingRight); 224751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) floatLogicalLeft = logicalLeftOffsetForPositioningFloat(logicalTopOffset, logicalLeftOffset, false, &heightRemainingLeft); 2248f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (insideFlowThread) { 2249f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Have to re-evaluate all of our offsets, since they may have changed. 225009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalRightOffset = logicalRightOffsetForContent(); // Constant part of right offset. 225109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalLeftOffset = logicalLeftOffsetForContent(); // Constant part of left offset. 2252197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch floatLogicalWidth = std::min(logicalWidthForFloat(floatingObject), logicalRightOffset - logicalLeftOffset); 2253f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2254f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2255197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch floatLogicalLeft = std::max(logicalLeftOffset - borderAndPaddingLogicalLeft(), floatLogicalLeft); 2256f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } else { 2257f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit heightRemainingLeft = 1; 2258f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit heightRemainingRight = 1; 225951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) floatLogicalLeft = logicalRightOffsetForPositioningFloat(logicalTopOffset, logicalRightOffset, false, &heightRemainingRight); 226051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) while (floatLogicalLeft - logicalLeftOffsetForPositioningFloat(logicalTopOffset, logicalLeftOffset, false, &heightRemainingLeft) < floatLogicalWidth) { 2261197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTopOffset += std::min(heightRemainingLeft, heightRemainingRight); 226251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) floatLogicalLeft = logicalRightOffsetForPositioningFloat(logicalTopOffset, logicalRightOffset, false, &heightRemainingRight); 2263f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (insideFlowThread) { 2264f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Have to re-evaluate all of our offsets, since they may have changed. 226509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalRightOffset = logicalRightOffsetForContent(); // Constant part of right offset. 226609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalLeftOffset = logicalLeftOffsetForContent(); // Constant part of left offset. 2267197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch floatLogicalWidth = std::min(logicalWidthForFloat(floatingObject), logicalRightOffset - logicalLeftOffset); 2268f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2269f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2270f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Use the original width of the float here, since the local variable 2271f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // |floatLogicalWidth| was capped to the available line width. See 2272f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // fast/block/float/clamped-right-float.html. 2273f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatLogicalLeft -= logicalWidthForFloat(floatingObject); 2274f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2275f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2276f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return LayoutPoint(floatLogicalLeft, logicalTopOffset); 2277f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2278f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2279f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)FloatingObject* RenderBlockFlow::insertFloatingObject(RenderBox* floatBox) 2280f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2281f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ASSERT(floatBox->isFloating()); 2282f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2283f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Create the list of special objects if we don't aleady have one 2284f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) { 2285f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) createFloatingObjects(); 2286f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } else { 2287f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Don't insert the object again if it's already in the list 2288f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 228951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) FloatingObjectSetIterator it = floatingObjectSet.find<FloatingObjectHashTranslator>(floatBox); 2290f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (it != floatingObjectSet.end()) 2291d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) return it->get(); 2292f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2293f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2294f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Create the special object entry & append it to the list 2295f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2296f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) OwnPtr<FloatingObject> newObj = FloatingObject::create(floatBox); 2297f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2298f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Our location is irrelevant if we're unsplittable or no pagination is in effect. 2299f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Just go ahead and lay out the float. 2300f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool isChildRenderBlock = floatBox->isRenderBlock(); 2301f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (isChildRenderBlock && !floatBox->needsLayout() && view()->layoutState()->pageLogicalHeightChanged()) 2302f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatBox->setChildNeedsLayout(MarkOnlyThis); 2303f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2304f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool needsBlockDirectionLocationSetBeforeLayout = isChildRenderBlock && view()->layoutState()->needsBlockDirectionLocationSetBeforeLayout(); 2305f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!needsBlockDirectionLocationSetBeforeLayout || isWritingModeRoot()) { // We are unsplittable if we're a block flow root. 2306f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatBox->layoutIfNeeded(); 2307f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } else { 2308f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatBox->updateLogicalWidth(); 2309f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatBox->computeAndSetBlockDirectionMargins(this); 2310f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2311f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2312f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalWidthForFloat(newObj.get(), logicalWidthForChild(floatBox) + marginStartForChild(floatBox) + marginEndForChild(floatBox)); 2313f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2314f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return m_floatingObjects->add(newObj.release()); 2315f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2316f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2317f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::removeFloatingObject(RenderBox* floatBox) 2318f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2319f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (m_floatingObjects) { 2320f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 232151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) FloatingObjectSetIterator it = floatingObjectSet.find<FloatingObjectHashTranslator>(floatBox); 2322f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (it != floatingObjectSet.end()) { 2323d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2324f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childrenInline()) { 2325f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalTop = logicalTopForFloat(floatingObject); 2326f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalBottom = logicalBottomForFloat(floatingObject); 2327f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2328f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Fix for https://bugs.webkit.org/show_bug.cgi?id=54995. 2329f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (logicalBottom < 0 || logicalBottom < logicalTop || logicalTop == LayoutUnit::max()) { 2330f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) logicalBottom = LayoutUnit::max(); 2331f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } else { 2332f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Special-case zero- and less-than-zero-height floats: those don't touch 2333f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // the line that they're on, but it still needs to be dirtied. This is 2334f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // accomplished by pretending they have a height of 1. 2335197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalBottom = std::max(logicalBottom, logicalTop + 1); 2336f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2337f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->originatingLine()) { 2338f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!selfNeedsLayout()) { 2339f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ASSERT(floatingObject->originatingLine()->renderer() == this); 2340f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->originatingLine()->markDirty(); 2341f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2342197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch#if ENABLE(ASSERT) 2343f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->setOriginatingLine(0); 2344f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)#endif 2345f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2346f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) markLinesDirtyInBlockRange(0, logicalBottom); 2347f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2348f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->remove(floatingObject); 2349f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2350f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2351f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2352f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2353f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::removeFloatingObjectsBelow(FloatingObject* lastFloat, int logicalOffset) 2354f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2355f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!containsFloats()) 2356f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 2357f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2358f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2359d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* curr = floatingObjectSet.last().get(); 2360f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) while (curr != lastFloat && (!curr->isPlaced() || logicalTopForFloat(curr) >= logicalOffset)) { 2361f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->remove(curr); 2362f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObjectSet.isEmpty()) 2363f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 2364d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) curr = floatingObjectSet.last().get(); 2365f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2366f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2367f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2368f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)bool RenderBlockFlow::positionNewFloats() 2369f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2370f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2371f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2372f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2373f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2374f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObjectSet.isEmpty()) 2375f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2376f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2377f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // If all floats have already been positioned, then we have no work to do. 2378f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObjectSet.last()->isPlaced()) 2379f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2380f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2381f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Move backwards through our floating object list until we find a float that has 2382f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // already been positioned. Then we'll be able to move forward, positioning all of 2383f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // the new floats that need it. 2384f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator it = floatingObjectSet.end(); 2385f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) --it; // Go to last item. 2386f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator begin = floatingObjectSet.begin(); 2387f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObject* lastPlacedFloatingObject = 0; 2388f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) while (it != begin) { 2389f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) --it; 2390f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if ((*it)->isPlaced()) { 2391d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) lastPlacedFloatingObject = it->get(); 2392f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ++it; 2393f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) break; 2394f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2395f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2396f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2397f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalTop = logicalHeight(); 2398f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2399f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // The float cannot start above the top position of the last positioned float. 2400f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (lastPlacedFloatingObject) 2401197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTop = std::max(logicalTopForFloat(lastPlacedFloatingObject), logicalTop); 2402f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2403f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 2404f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Now walk through the set of unpositioned floats and place them. 2405f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (; it != end; ++it) { 2406d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2407f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // The containing block is responsible for positioning floats, so if we have floats in our 2408f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // list that come from somewhere else, do not attempt to position them. 2409f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->renderer()->containingBlock() != this) 2410f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) continue; 2411f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2412f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) RenderBox* childBox = floatingObject->renderer(); 2413f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2414323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) // FIXME Investigate if this can be removed. crbug.com/370006 2415f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) childBox->setMayNeedPaintInvalidation(true); 2416323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) 241709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit childLogicalLeftMargin = style()->isLeftToRightDirection() ? marginStartForChild(childBox) : marginEndForChild(childBox); 2418f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childBox->style()->clear() & CLEFT) 2419197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTop = std::max(lowestFloatLogicalBottom(FloatingObject::FloatLeft), logicalTop); 2420f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (childBox->style()->clear() & CRIGHT) 2421197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalTop = std::max(lowestFloatLogicalBottom(FloatingObject::FloatRight), logicalTop); 2422f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2423f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutPoint floatLogicalLocation = computeLogicalLocationForFloat(floatingObject, logicalTop); 2424f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2425f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalLeftForFloat(floatingObject, floatLogicalLocation.x()); 2426f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2427f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalLeftForChild(childBox, floatLogicalLocation.x() + childLogicalLeftMargin); 2428f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalTopForChild(childBox, floatLogicalLocation.y() + marginBeforeForChild(childBox)); 2429f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 243010f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch SubtreeLayoutScope layoutScope(*childBox); 2431f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutState* layoutState = view()->layoutState(); 2432f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool isPaginated = layoutState->isPaginated(); 2433f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (isPaginated && !childBox->needsLayout()) 2434f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childBox->markForPaginationRelayoutIfNeeded(layoutScope); 2435f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2436f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childBox->layoutIfNeeded(); 2437f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2438f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (isPaginated) { 2439f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // If we are unsplittable and don't fit, then we need to move down. 2440f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // We include our margins as part of the unsplittable area. 2441f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit newLogicalTop = adjustForUnsplittableChild(childBox, floatLogicalLocation.y(), true); 2442f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2443f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // See if we have a pagination strut that is making us move down further. 2444f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Note that an unsplittable child can't also have a pagination strut, so this is 2445f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // exclusive with the case above. 2446197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch RenderBlockFlow* childBlockFlow = childBox->isRenderBlockFlow() ? toRenderBlockFlow(childBox) : 0; 2447197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (childBlockFlow && childBlockFlow->paginationStrut()) { 2448197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch newLogicalTop += childBlockFlow->paginationStrut(); 2449197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch childBlockFlow->setPaginationStrut(0); 2450f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2451f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2452f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (newLogicalTop != floatLogicalLocation.y()) { 2453f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->setPaginationStrut(newLogicalTop - floatLogicalLocation.y()); 2454f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2455f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatLogicalLocation = computeLogicalLocationForFloat(floatingObject, newLogicalTop); 2456f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalLeftForFloat(floatingObject, floatLogicalLocation.x()); 2457f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2458f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalLeftForChild(childBox, floatLogicalLocation.x() + childLogicalLeftMargin); 2459f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalTopForChild(childBox, floatLogicalLocation.y() + marginBeforeForChild(childBox)); 2460f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2461197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (childBox->isRenderBlock()) 2462197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch childBox->setChildNeedsLayout(MarkOnlyThis); 2463f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) childBox->layoutIfNeeded(); 2464f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2465f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2466f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2467f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalTopForFloat(floatingObject, floatLogicalLocation.y()); 2468f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2469f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) setLogicalHeightForFloat(floatingObject, logicalHeightForChild(childBox) + marginBeforeForChild(childBox) + marginAfterForChild(childBox)); 2470f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2471f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->addPlacedObject(floatingObject); 2472f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 247351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (ShapeOutsideInfo* shapeOutside = childBox->shapeOutsideInfo()) 2474d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) shapeOutside->setReferenceBoxLogicalSize(logicalSizeForChild(childBox)); 2475f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2476f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return true; 2477f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2478f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2479f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)bool RenderBlockFlow::hasOverhangingFloat(RenderBox* renderer) 2480f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2481f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects || hasColumns() || !parent()) 2482f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2483f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2484f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 248551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) FloatingObjectSetIterator it = floatingObjectSet.find<FloatingObjectHashTranslator>(renderer); 2486f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (it == floatingObjectSet.end()) 2487f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2488f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2489d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) return logicalBottomForFloat(it->get()) > logicalHeight(); 2490f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2491f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2492f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::addIntrudingFloats(RenderBlockFlow* prev, LayoutUnit logicalLeftOffset, LayoutUnit logicalTopOffset) 2493f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2494f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ASSERT(!avoidsFloats()); 2495f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2496f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu // If we create our own block formatting context then our contents don't interact with floats outside it, even those from our parent. 2497f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu if (createsBlockFormattingContext()) 2498f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu return; 2499f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu 2500f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // If the parent or previous sibling doesn't have any floats to add, don't bother. 2501f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!prev->m_floatingObjects) 2502f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return; 2503f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2504f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) logicalLeftOffset += marginLogicalLeft(); 2505f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2506f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& prevSet = prev->m_floatingObjects->set(); 2507f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator prevEnd = prevSet.end(); 2508f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator prevIt = prevSet.begin(); prevIt != prevEnd; ++prevIt) { 2509d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = prevIt->get(); 2510f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (logicalBottomForFloat(floatingObject) > logicalTopOffset) { 2511f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects || !m_floatingObjects->set().contains(floatingObject)) { 2512f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // We create the floating object list lazily. 2513f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2514f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) createFloatingObjects(); 2515f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2516f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Applying the child's margin makes no sense in the case where the child was passed in. 2517f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // since this margin was added already through the modification of the |logicalLeftOffset| variable 2518f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // above. |logicalLeftOffset| will equal the margin in this case, so it's already been taken 2519f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // into account. Only apply this code if prev is the parent, since otherwise the left margin 2520f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // will get applied twice. 2521f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutSize offset = isHorizontalWritingMode() 2522f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ? LayoutSize(logicalLeftOffset - (prev != parent() ? prev->marginLeft() : LayoutUnit()), logicalTopOffset) 2523f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) : LayoutSize(logicalTopOffset, logicalLeftOffset - (prev != parent() ? prev->marginTop() : LayoutUnit())); 2524f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2525f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->add(floatingObject->copyToNewContainer(offset)); 2526f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2527f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2528f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2529f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2530f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 253110f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdochvoid RenderBlockFlow::addOverhangingFloats(RenderBlockFlow* child, bool makeChildPaintOtherFloats) 2532f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2533f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Prevent floats from being added to the canvas by the root element, e.g., <html>. 2534f91f5fa1608c2cdd9af1842fb5dadbe78275be2aBo Liu if (!child->containsFloats() || child->isRenderRegion() || child->createsBlockFormattingContext()) 253510f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch return; 2536f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2537f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childLogicalTop = child->logicalTop(); 2538f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit childLogicalLeft = child->logicalLeft(); 2539f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2540f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Floats that will remain the child's responsibility to paint should factor into its 2541f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // overflow. 2542f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator childEnd = child->m_floatingObjects->set().end(); 2543f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator childIt = child->m_floatingObjects->set().begin(); childIt != childEnd; ++childIt) { 2544d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = childIt->get(); 2545197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch LayoutUnit logicalBottomForFloat = std::min(this->logicalBottomForFloat(floatingObject), LayoutUnit::max() - childLogicalTop); 2546f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit logicalBottom = childLogicalTop + logicalBottomForFloat; 2547f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2548f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (logicalBottom > logicalHeight()) { 2549f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // If the object is not in the list, we add it now. 2550f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!containsFloat(floatingObject->renderer())) { 2551f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutSize offset = isHorizontalWritingMode() ? LayoutSize(-childLogicalLeft, -childLogicalTop) : LayoutSize(-childLogicalTop, -childLogicalLeft); 2552f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) bool shouldPaint = false; 2553f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2554f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // The nearest enclosing layer always paints the float (so that zindex and stacking 2555f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // behaves properly). We always want to propagate the desire to paint the float as 2556f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // far out as we can, to the outermost block that overlaps the float, stopping only 2557f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // if we hit a self-painting layer boundary. 2558f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->renderer()->enclosingFloatPaintingLayer() == enclosingFloatPaintingLayer()) { 2559f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->setShouldPaint(false); 2560f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) shouldPaint = true; 2561f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2562f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // We create the floating object list lazily. 2563f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2564f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) createFloatingObjects(); 2565f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2566f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) m_floatingObjects->add(floatingObject->copyToNewContainer(offset, shouldPaint, true)); 2567f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2568f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } else { 2569f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (makeChildPaintOtherFloats && !floatingObject->shouldPaint() && !floatingObject->renderer()->hasSelfPaintingLayer() 2570f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) && floatingObject->renderer()->isDescendantOf(child) && floatingObject->renderer()->enclosingFloatPaintingLayer() == child->enclosingFloatPaintingLayer()) { 2571f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // The float is not overhanging from this block, so if it is a descendant of the child, the child should 2572f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // paint it (the other case is that it is intruding into the child), unless it has its own layer or enclosing 2573f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // layer. 2574f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // If makeChildPaintOtherFloats is false, it means that the child must already know about all the floats 2575f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // it should paint. 2576f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatingObject->setShouldPaint(true); 2577f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2578f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2579f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Since the float doesn't overhang, it didn't get put into our list. We need to go ahead and add its overflow in to the 2580f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // child now. 2581f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->isDescendant()) 2582f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) child->addOverflowFromChild(floatingObject->renderer(), LayoutSize(xPositionForFloatIncludingMargin(floatingObject), yPositionForFloatIncludingMargin(floatingObject))); 2583f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2584f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2585f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2586f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2587f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)LayoutUnit RenderBlockFlow::lowestFloatLogicalBottom(FloatingObject::Type floatType) const 2588f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2589f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2590f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return 0; 2591f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2592f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return m_floatingObjects->lowestFloatLogicalBottom(floatType); 2593f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2594f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2595f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)LayoutUnit RenderBlockFlow::nextFloatLogicalBottomBelow(LayoutUnit logicalHeight, ShapeOutsideFloatOffsetMode offsetMode) const 2596f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2597f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2598f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return logicalHeight; 2599f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 26006f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch LayoutUnit logicalBottom; 2601f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2602f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 2603f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 2604d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2605f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit floatLogicalBottom = logicalBottomForFloat(floatingObject); 2606f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) ShapeOutsideInfo* shapeOutside = floatingObject->renderer()->shapeOutsideInfo(); 2607f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (shapeOutside && (offsetMode == ShapeOutsideFloatShapeOffset)) { 2608f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit shapeLogicalBottom = logicalTopForFloat(floatingObject) + marginBeforeForChild(floatingObject->renderer()) + shapeOutside->shapeLogicalBottom(); 2609f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Use the shapeLogicalBottom unless it extends outside of the margin box, in which case it is clipped. 2610f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (shapeLogicalBottom < floatLogicalBottom) 2611f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) floatLogicalBottom = shapeLogicalBottom; 2612f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2613f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatLogicalBottom > logicalHeight) 2614197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch logicalBottom = logicalBottom ? std::min(floatLogicalBottom, logicalBottom) : floatLogicalBottom; 2615f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2616f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 26176f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch return logicalBottom; 2618f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2619f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2620f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)bool RenderBlockFlow::hitTestFloats(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset) 2621f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2622f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (!m_floatingObjects) 2623f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2624f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2625f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutPoint adjustedLocation = accumulatedOffset; 2626f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (isRenderView()) { 2627f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) adjustedLocation += toLayoutSize(toRenderView(this)->frameView()->scrollPosition()); 2628f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2629f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2630f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2631f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator begin = floatingObjectSet.begin(); 2632f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.end(); it != begin;) { 2633f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) --it; 2634d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2635f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->shouldPaint() && !floatingObject->renderer()->hasSelfPaintingLayer()) { 2636f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit xOffset = xPositionForFloatIncludingMargin(floatingObject) - floatingObject->renderer()->x(); 2637f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit yOffset = yPositionForFloatIncludingMargin(floatingObject) - floatingObject->renderer()->y(); 2638f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutPoint childPoint = flipFloatForWritingModeForChild(floatingObject, adjustedLocation + LayoutSize(xOffset, yOffset)); 2639f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->renderer()->hitTest(request, result, locationInContainer, childPoint)) { 2640f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) updateHitTestResult(result, locationInContainer.point() - toLayoutSize(childPoint)); 2641f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return true; 2642f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2643f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2644f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2645f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2646f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return false; 2647f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2648f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2649f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void RenderBlockFlow::adjustForBorderFit(LayoutUnit x, LayoutUnit& left, LayoutUnit& right) const 2650f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2651c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (style()->visibility() != VISIBLE) 2652c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return; 2653c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2654c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // We don't deal with relative positioning. Our assumption is that you shrink to fit the lines without accounting 2655c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // for either overflow or translations via relative positioning. 2656c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (childrenInline()) { 2657c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) for (RootInlineBox* box = firstRootBox(); box; box = box->nextRootBox()) { 2658c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (box->firstChild()) 2659c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) left = std::min(left, x + static_cast<LayoutUnit>(box->firstChild()->x())); 2660c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (box->lastChild()) 2661c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) right = std::max(right, x + static_cast<LayoutUnit>(ceilf(box->lastChild()->logicalRight()))); 2662c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 2663c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } else { 2664c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) for (RenderBox* obj = firstChildBox(); obj; obj = obj->nextSiblingBox()) { 2665c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (!obj->isFloatingOrOutOfFlowPositioned()) { 2666c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (obj->isRenderBlockFlow() && !obj->hasOverflowClip()) { 2667c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) toRenderBlockFlow(obj)->adjustForBorderFit(x + obj->x(), left, right); 2668c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } else if (obj->style()->visibility() == VISIBLE) { 2669c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // We are a replaced element or some kind of non-block-flow object. 2670c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) left = std::min(left, x + obj->x()); 2671c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) right = std::max(right, x + obj->x() + obj->width()); 2672c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 2673c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 2674c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 2675c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 2676c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2677c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (m_floatingObjects) { 2678f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set(); 2679f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) FloatingObjectSetIterator end = floatingObjectSet.end(); 2680f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) { 2681d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) FloatingObject* floatingObject = it->get(); 2682f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) // Only examine the object if our m_shouldPaint flag is set. 2683f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (floatingObject->shouldPaint()) { 2684f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit floatLeft = xPositionForFloatIncludingMargin(floatingObject) - floatingObject->renderer()->x(); 2685f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) LayoutUnit floatRight = floatLeft + floatingObject->renderer()->width(); 2686197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch left = std::min(left, floatLeft); 2687197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch right = std::max(right, floatRight); 2688f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2689f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2690f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) } 2691f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2692f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2693c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)void RenderBlockFlow::fitBorderToLinesIfNeeded() 2694c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 2695c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (style()->borderFit() == BorderFitBorder || hasOverrideWidth()) 2696c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return; 2697c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2698c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // Walk any normal flow lines to snugly fit. 2699c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit left = LayoutUnit::max(); 2700c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit right = LayoutUnit::min(); 2701c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit oldWidth = contentWidth(); 2702c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) adjustForBorderFit(0, left, right); 2703c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2704c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // Clamp to our existing edges. We can never grow. We only shrink. 2705c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit leftEdge = borderLeft() + paddingLeft(); 2706c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit rightEdge = leftEdge + oldWidth; 2707c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) left = std::min(rightEdge, std::max(leftEdge, left)); 2708c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) right = std::max(left, std::min(rightEdge, right)); 2709c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2710c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) LayoutUnit newContentWidth = right - left; 2711c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) if (newContentWidth == oldWidth) 2712c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return; 2713c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 2714c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) setOverrideLogicalContentWidth(newContentWidth); 2715c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) layoutBlock(false); 2716c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) clearOverrideLogicalContentWidth(); 2717c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 2718c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 271951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)LayoutUnit RenderBlockFlow::logicalLeftFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const 2720f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2721f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (m_floatingObjects && m_floatingObjects->hasLeftObjects()) 272251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return m_floatingObjects->logicalLeftOffset(fixedOffset, logicalTop, logicalHeight); 2723f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2724f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return fixedOffset; 2725f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2726f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 272751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)LayoutUnit RenderBlockFlow::logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const 2728f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles){ 2729f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) if (m_floatingObjects && m_floatingObjects->hasRightObjects()) 273051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return m_floatingObjects->logicalRightOffset(fixedOffset, logicalTop, logicalHeight); 2731f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 2732f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) return fixedOffset; 2733f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)} 2734f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 27357242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano TucciGapRects RenderBlockFlow::inlineSelectionGaps(const RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, 27367242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* paintInfo) const 273751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 273851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) GapRects result; 273951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 274051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) bool containsStart = selectionState() == SelectionStart || selectionState() == SelectionBoth; 274151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 274251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (!firstLineBox()) { 274351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (containsStart) { 274451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // Go ahead and update our lastLogicalTop to be the bottom of the block. <hr>s or empty blocks with height can trip this 274551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // case. 274651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalHeight(); 274751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, logicalHeight()); 274851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalRight = logicalRightSelectionOffset(rootBlock, logicalHeight()); 274951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 275051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return result; 275151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 275251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 275351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) RootInlineBox* lastSelectedLine = 0; 275451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) RootInlineBox* curr; 275551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) for (curr = firstRootBox(); curr && !curr->hasSelectedChildren(); curr = curr->nextRootBox()) { } 275651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 275751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // Now paint the gaps for the lines. 275851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) for (; curr && curr->hasSelectedChildren(); curr = curr->nextRootBox()) { 275951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutUnit selTop = curr->selectionTopAdjustedForPrecedingBlock(); 276051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutUnit selHeight = curr->selectionHeightAdjustedForPrecedingBlock(); 276151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 276251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (!containsStart && !lastSelectedLine && selectionState() != SelectionStart && selectionState() != SelectionBoth) { 276351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, 276451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalLeft, lastLogicalRight, selTop, paintInfo)); 276551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 276651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 276751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutRect logicalRect(curr->logicalLeft(), selTop, curr->logicalWidth(), selTop + selHeight); 276851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) logicalRect.move(isHorizontalWritingMode() ? offsetFromRootBlock : offsetFromRootBlock.transposedSize()); 276951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) LayoutRect physicalRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect); 277051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (!paintInfo || (isHorizontalWritingMode() && physicalRect.y() < paintInfo->rect.maxY() && physicalRect.maxY() > paintInfo->rect.y()) 277151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) || (!isHorizontalWritingMode() && physicalRect.x() < paintInfo->rect.maxX() && physicalRect.maxX() > paintInfo->rect.x())) 277251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) result.unite(curr->lineSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, selTop, selHeight, paintInfo)); 277351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 277451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastSelectedLine = curr; 277551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 277651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 277751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (containsStart && !lastSelectedLine) { 277851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // VisibleSelection must start just after our last line. 277951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastSelectedLine = lastRootBox(); 278051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 278151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 278251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (lastSelectedLine && selectionState() != SelectionEnd && selectionState() != SelectionBoth) { 278351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // Go ahead and update our lastY to be the bottom of the last selected line. 278451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + lastSelectedLine->selectionBottom(); 278551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, lastSelectedLine->selectionBottom()); 278651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) lastLogicalRight = logicalRightSelectionOffset(rootBlock, lastSelectedLine->selectionBottom()); 278751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 278851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return result; 278951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 279051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 2791197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::setPaginationStrut(LayoutUnit strut) 2792197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 2793197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (!m_rareData) { 2794197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (!strut) 2795197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return; 2796e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 2797197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 2798197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch m_rareData->m_paginationStrut = strut; 2799197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 2800197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2801c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)bool RenderBlockFlow::avoidsFloats() const 2802c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles){ 2803c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // Floats can't intrude into our box if we have a non-auto column count or width. 2804c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) // Note: we need to use RenderBox::avoidsFloats here since RenderBlock::avoidsFloats is always true. 2805c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) return RenderBox::avoidsFloats() || !style()->hasAutoColumnCount() || !style()->hasAutoColumnWidth(); 2806c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} 2807c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 28087242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano TucciLayoutUnit RenderBlockFlow::logicalLeftSelectionOffset(const RenderBlock* rootBlock, LayoutUnit position) const 280909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 281009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit logicalLeft = logicalLeftOffsetForLine(position, false); 281109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (logicalLeft == logicalLeftOffsetForContent()) 281209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return RenderBlock::logicalLeftSelectionOffset(rootBlock, position); 281309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 28147242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci const RenderBlock* cb = this; 281509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) while (cb != rootBlock) { 281609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalLeft += cb->logicalLeft(); 281709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) cb = cb->containingBlock(); 281809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 281909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return logicalLeft; 282009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 282109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 28227242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano TucciLayoutUnit RenderBlockFlow::logicalRightSelectionOffset(const RenderBlock* rootBlock, LayoutUnit position) const 282309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 282409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) LayoutUnit logicalRight = logicalRightOffsetForLine(position, false); 282509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (logicalRight == logicalRightOffsetForContent()) 282609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return RenderBlock::logicalRightSelectionOffset(rootBlock, position); 282709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 28287242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci const RenderBlock* cb = this; 282909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) while (cb != rootBlock) { 283009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) logicalRight += cb->logicalLeft(); 283109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) cb = cb->containingBlock(); 283209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 283309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return logicalRight; 283409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 283509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 283609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)RootInlineBox* RenderBlockFlow::createRootInlineBox() 283751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 2838d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return new RootInlineBox(*this); 2839d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 2840d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 2841197021e6b966cfb06891637935ef33fff06433d1Ben Murdochbool RenderBlockFlow::isPagedOverflow(const RenderStyle* style) 2842197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 2843197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return style->isOverflowPaged() && node() != document().viewportDefiningElement(); 2844197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 2845197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2846197021e6b966cfb06891637935ef33fff06433d1Ben MurdochRenderBlockFlow::FlowThreadType RenderBlockFlow::flowThreadType(const RenderStyle* style) 2847197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 2848197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (isPagedOverflow(style)) 2849197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return PagedFlowThread; 2850197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (style->specifiesColumns()) 2851197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return MultiColumnFlowThread; 2852197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return NoFlowThread; 2853197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 2854197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2855197021e6b966cfb06891637935ef33fff06433d1Ben MurdochRenderMultiColumnFlowThread* RenderBlockFlow::createMultiColumnFlowThread(FlowThreadType type) 2856197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch{ 2857197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch switch (type) { 2858197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch case MultiColumnFlowThread: 2859197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return RenderMultiColumnFlowThread::createAnonymous(document(), style()); 2860197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch case PagedFlowThread: 2861197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // Paged overflow is currently done using the multicol implementation. 2862197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return RenderPagedFlowThread::createAnonymous(document(), style()); 2863197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch default: 2864197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch ASSERT_NOT_REACHED(); 2865197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return nullptr; 2866197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch } 2867197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch} 2868197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2869197021e6b966cfb06891637935ef33fff06433d1Ben Murdochvoid RenderBlockFlow::createOrDestroyMultiColumnFlowThreadIfNeeded(const RenderStyle* oldStyle) 2870d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 28716f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch if (!document().regionBasedColumnsEnabled()) 2872d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return; 2873d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 2874197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // Paged overflow trumps multicol in this implementation. Ideally, it should be possible to have 2875197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // both paged overflow and multicol on the same element, but then we need two flow 2876197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // threads. Anyway, this is nothing to worry about until we can actually nest multicol properly 2877197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // inside other fragmentation contexts. 2878197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch FlowThreadType type = flowThreadType(style()); 2879197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2880197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (multiColumnFlowThread()) { 2881197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch ASSERT(oldStyle); 2882197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (type != flowThreadType(oldStyle)) { 2883197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // If we're no longer to be multicol/paged, destroy the flow thread. Also destroy it 2884197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // when switching between multicol and paged, since that affects the column set 2885197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch // structure (multicol containers may have spanners, paged containers may not). 28866f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch multiColumnFlowThread()->evacuateAndDestroy(); 28876f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch ASSERT(!multiColumnFlowThread()); 28886f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch } 28896f543c786fc42989f552b4daa774ca5ff32fa697Ben Murdoch } 2890197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2891197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch if (type == NoFlowThread || multiColumnFlowThread()) 2892197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch return; 2893197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch 2894197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch RenderMultiColumnFlowThread* flowThread = createMultiColumnFlowThread(type); 2895197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch addChild(flowThread); 2896197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch flowThread->populate(); 2897197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch RenderBlockFlowRareData& rareData = ensureRareData(); 2898197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch ASSERT(!rareData.m_multiColumnFlowThread); 2899197021e6b966cfb06891637935ef33fff06433d1Ben Murdoch rareData.m_multiColumnFlowThread = flowThread; 290051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 290151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 290251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData() 290351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 290451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (m_rareData) 290551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return *m_rareData; 290651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 2907e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) m_rareData = adoptPtrWillBeNoop(new RenderBlockFlowRareData(this)); 290851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return *m_rareData; 290951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 291051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 29117242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tuccivoid RenderBlockFlow::positionDialog() 29127242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci{ 29137242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci HTMLDialogElement* dialog = toHTMLDialogElement(node()); 29147242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (dialog->centeringMode() == HTMLDialogElement::NotCentered) 29157242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return; 29167242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 29177242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci bool canCenterDialog = (style()->position() == AbsolutePosition || style()->position() == FixedPosition) 29187242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci && style()->hasAutoTopAndBottom(); 29197242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 29207242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (dialog->centeringMode() == HTMLDialogElement::Centered) { 29217242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (canCenterDialog) 29227242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci setY(dialog->centeredPosition()); 29237242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return; 29247242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci } 29257242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 29267242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci ASSERT(dialog->centeringMode() == HTMLDialogElement::NeedsCentering); 29277242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (!canCenterDialog) { 29287242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci dialog->setNotCentered(); 29297242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return; 29307242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci } 29317242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 29327242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci FrameView* frameView = document().view(); 29337242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci LayoutUnit top = (style()->position() == FixedPosition) ? 0 : frameView->scrollOffset().height(); 29347242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci int visibleHeight = frameView->visibleContentRect(IncludeScrollbars).height(); 29357242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (height() < visibleHeight) 29367242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci top += (visibleHeight - height()) / 2; 29377242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci setY(top); 29387242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci dialog->setCentered(top); 29397242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci} 29407242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 2941c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} // namespace blink 2942