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)}
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