1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RenderFragmentContainerSet.h"
28
29#include "RenderBoxFragmentInfo.h"
30#include "RenderFragmentedFlow.h"
31#include <wtf/IsoMallocInlines.h>
32
33namespace WebCore {
34
35WTF_MAKE_ISO_ALLOCATED_IMPL(RenderFragmentContainerSet);
36
37RenderFragmentContainerSet::RenderFragmentContainerSet(Document& document, RenderStyle&& style, RenderFragmentedFlow& fragmentedFlow)
38 : RenderFragmentContainer(document, WTFMove(style), &fragmentedFlow)
39{
40}
41
42void RenderFragmentContainerSet::installFragmentedFlow()
43{
44 // We don't have to do anything, since we were able to connect the flow thread
45 // in the constructor.
46}
47
48void RenderFragmentContainerSet::expandToEncompassFragmentedFlowContentsIfNeeded()
49{
50 // Whenever the last region is a set, it always expands its region rect to consume all
51 // of the flow thread content. This is because it is always capable of generating an
52 // infinite number of boxes in order to hold all of the remaining content.
53 LayoutRect rect(fragmentedFlowPortionRect());
54
55 // Get the offset within the flow thread in its block progression direction. Then get the
56 // flow thread's remaining logical height including its overflow and expand our rect
57 // to encompass that remaining height and overflow. The idea is that we will generate
58 // additional columns and pages to hold that overflow, since people do write bad
59 // content like <body style="height:0px"> in multi-column layouts.
60 bool isHorizontal = fragmentedFlow()->isHorizontalWritingMode();
61 LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x();
62 LayoutRect layoutRect = fragmentedFlow()->layoutOverflowRect();
63 LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : layoutRect.maxX()) - logicalTopOffset;
64 setFragmentedFlowPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow : rect.height()));
65}
66
67}
68