/* * Copyright (C) 2012 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "RenderRegionSet.h" #include "RenderFlowThread.h" namespace WebCore { RenderRegionSet::RenderRegionSet(Document& document, Ref&& style, RenderFlowThread& flowThread) : RenderRegion(document, WTFMove(style), &flowThread) { } void RenderRegionSet::installFlowThread() { // We don't have to do anything, since we were able to connect the flow thread // in the constructor. } void RenderRegionSet::expandToEncompassFlowThreadContentsIfNeeded() { // Whenever the last region is a set, it always expands its region rect to consume all // of the flow thread content. This is because it is always capable of generating an // infinite number of boxes in order to hold all of the remaining content. LayoutRect rect(flowThreadPortionRect()); // Get the offset within the flow thread in its block progression direction. Then get the // flow thread's remaining logical height including its overflow and expand our rect // to encompass that remaining height and overflow. The idea is that we will generate // additional columns and pages to hold that overflow, since people do write bad // content like in multi-column layouts. bool isHorizontal = flowThread()->isHorizontalWritingMode(); LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x(); LayoutRect layoutRect = flowThread()->layoutOverflowRect(); LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : layoutRect.maxX()) - logicalTopOffset; setFlowThreadPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow : rect.height())); } }