15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2010, 2011 Apple Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * documentation and/or other materials provided with the distribution. 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2302772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef ColumnInfo_h 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define ColumnInfo_h 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 291e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/LayoutUnit.h" 3002772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch#include "wtf/Vector.h" 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 32c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class ColumnInfo { 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) WTF_MAKE_NONCOPYABLE(ColumnInfo); WTF_MAKE_FAST_ALLOCATED; 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ColumnInfo() 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) : m_desiredColumnWidth(0) 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_desiredColumnCount(1) 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_progressionAxis(InlineAxis) 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_columnCount(1) 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_columnHeight(0) 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_minimumColumnHeight(0) 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_forcedBreaks(0) 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_maximumDistanceBetweenForcedBreaks(0) 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) , m_forcedBreakOffset(0) 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit desiredColumnWidth() const { return m_desiredColumnWidth; } 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void setDesiredColumnWidth(LayoutUnit width) { m_desiredColumnWidth = width; } 5202772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned desiredColumnCount() const { return m_desiredColumnCount; } 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void setDesiredColumnCount(unsigned count) { m_desiredColumnCount = count; } 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) enum Axis { InlineAxis, BlockAxis }; 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Axis progressionAxis() const { return m_progressionAxis; } 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void setProgressionAxis(Axis progressionAxis) { m_progressionAxis = progressionAxis; } 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned columnCount() const { return m_columnCount; } 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit columnHeight() const { return m_columnHeight; } 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Set our count and height. This is enough info for a RenderBlock to compute page rects 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // dynamically. 665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void setColumnCountAndHeight(int count, LayoutUnit height) 6702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch { 685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_columnCount = count; 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_columnHeight = height; 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void setColumnHeight(LayoutUnit height) { m_columnHeight = height; } 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void updateMinimumColumnHeight(LayoutUnit height) { m_minimumColumnHeight = std::max(height, m_minimumColumnHeight); } 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit minimumColumnHeight() const { return m_minimumColumnHeight; } 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) int forcedBreaks() const { return m_forcedBreaks; } 775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit forcedBreakOffset() const { return m_forcedBreakOffset; } 785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit maximumDistanceBetweenForcedBreaks() const { return m_maximumDistanceBetweenForcedBreaks; } 795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void clearForcedBreaks() 8002772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch { 815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_forcedBreaks = 0; 825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_maximumDistanceBetweenForcedBreaks = 0; 835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_forcedBreakOffset = 0; 845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void addForcedBreak(LayoutUnit offsetFromFirstPage) 8602772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch { 875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(!m_columnHeight); 885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit distanceFromLastBreak = offsetFromFirstPage - m_forcedBreakOffset; 895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!distanceFromLastBreak) 905c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_forcedBreaks++; 925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_maximumDistanceBetweenForcedBreaks = std::max(m_maximumDistanceBetweenForcedBreaks, distanceFromLastBreak); 935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_forcedBreakOffset = offsetFromFirstPage; 945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)private: 975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit m_desiredColumnWidth; 985c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned m_desiredColumnCount; 995c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Axis m_progressionAxis; 1005c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1015c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned m_columnCount; 1025c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit m_columnHeight; 1035c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit m_minimumColumnHeight; 1045c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) int m_forcedBreaks; // FIXME: We will ultimately need to cache more information to balance around forced breaks properly. 1055c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit m_maximumDistanceBetweenForcedBreaks; 1065c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit m_forcedBreakOffset; 1075c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 1085c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 112