1/*
2 * Copyright (C) 2018 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "LayoutContainer.h"
28
29#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
30
31#include "RenderStyle.h"
32#include <wtf/IsoMallocInlines.h>
33
34namespace WebCore {
35namespace Layout {
36
37WTF_MAKE_ISO_ALLOCATED_IMPL(Container);
38
39Container::Container(Optional<ElementAttributes> attributes, RenderStyle&& style, BaseTypeFlags baseTypeFlags)
40 : Box(attributes, WTFMove(style), baseTypeFlags | ContainerFlag)
41{
42}
43
44const Box* Container::firstInFlowChild() const
45{
46 if (auto* firstChild = this->firstChild()) {
47 if (firstChild->isInFlow())
48 return firstChild;
49 return firstChild->nextInFlowSibling();
50 }
51 return nullptr;
52}
53
54const Box* Container::firstInFlowOrFloatingChild() const
55{
56 if (auto* firstChild = this->firstChild()) {
57 if (firstChild->isInFlow() || firstChild->isFloatingPositioned())
58 return firstChild;
59 return firstChild->nextInFlowOrFloatingSibling();
60 }
61 return nullptr;
62}
63
64const Box* Container::lastInFlowChild() const
65{
66 if (auto* lastChild = this->lastChild()) {
67 if (lastChild->isInFlow())
68 return lastChild;
69 return lastChild->previousInFlowSibling();
70 }
71 return nullptr;
72}
73
74const Box* Container::lastInFlowOrFloatingChild() const
75{
76 if (auto* lastChild = this->lastChild()) {
77 if (lastChild->isInFlow() || lastChild->isFloatingPositioned())
78 return lastChild;
79 return lastChild->previousInFlowOrFloatingSibling();
80 }
81 return nullptr;
82}
83
84void Container::setFirstChild(Box& childBox)
85{
86 m_firstChild = &childBox;
87}
88
89void Container::setLastChild(Box& childBox)
90{
91 m_lastChild = &childBox;
92}
93
94void Container::addOutOfFlowDescendant(const Box& outOfFlowBox)
95{
96 // Since we layout the out-of-flow boxes at the end of the formatting context layout,
97 // it's okay to store them at the formatting context root level -as opposed to the containing block level.
98 ASSERT(establishesFormattingContext());
99 m_outOfFlowDescendants.append(makeWeakPtr(outOfFlowBox));
100}
101
102}
103}
104#endif
105