15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2012 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 COMPUTER, 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 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "config.h" 2753e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)#include "core/rendering/RenderRegionSet.h" 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2953e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)#include "core/rendering/RenderFlowThread.h" 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WebCore { 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 33926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles)RenderRegionSet::RenderRegionSet(Element* element, RenderFlowThread* flowThread) 34926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) : RenderRegion(element, flowThread) 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void RenderRegionSet::installFlowThread() 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // We don't have to do anything, since we were able to connect the flow thread 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // in the constructor. 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void RenderRegionSet::expandToEncompassFlowThreadContentsIfNeeded() 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Whenever the last region is a set, it always expands its region rect to consume all 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // of the flow thread content. This is because it is always capable of generating an 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // infinite number of boxes in order to hold all of the remaining content. 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutRect rect(flowThreadPortionRect()); 5002772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Get the offset within the flow thread in its block progression direction. Then get the 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // flow thread's remaining logical height including its overflow and expand our rect 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // to encompass that remaining height and overflow. The idea is that we will generate 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // additional columns and pages to hold that overflow, since people do write bad 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // content like <body style="height:0px"> in multi-column layouts. 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool isHorizontal = flowThread()->isHorizontalWritingMode(); 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x(); 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutRect layoutRect = flowThread()->layoutOverflowRect(); 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : layoutRect.maxX()) - logicalTopOffset; 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) setFlowThreadPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow : rect.height())); 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 64