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#pragma once
27
28#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
29
30#include "LayoutBox.h"
31#include <wtf/IsoMalloc.h>
32#include <wtf/WeakPtr.h>
33
34namespace WebCore {
35
36class RenderStyle;
37
38namespace Layout {
39
40class Container : public Box {
41 WTF_MAKE_ISO_ALLOCATED(Container);
42public:
43 Container(Optional<ElementAttributes>, RenderStyle&&, BaseTypeFlags);
44
45 const Box* firstChild() const { return m_firstChild; }
46 const Box* firstInFlowChild() const;
47 const Box* firstInFlowOrFloatingChild() const;
48 const Box* lastChild() const { return m_lastChild; }
49 const Box* lastInFlowChild() const;
50 const Box* lastInFlowOrFloatingChild() const;
51
52 bool hasChild() const { return firstChild(); }
53 bool hasInFlowChild() const { return firstInFlowChild(); }
54 bool hasInFlowOrFloatingChild() const { return firstInFlowOrFloatingChild(); }
55
56 const Vector<WeakPtr<const Box>>& outOfFlowDescendants() const { return m_outOfFlowDescendants; }
57
58 void setFirstChild(Box&);
59 void setLastChild(Box&);
60 void addOutOfFlowDescendant(const Box&);
61
62private:
63 Box* m_firstChild { nullptr };
64 Box* m_lastChild { nullptr };
65 Vector<WeakPtr<const Box>> m_outOfFlowDescendants;
66};
67
68}
69}
70
71SPECIALIZE_TYPE_TRAITS_LAYOUT_BOX(Container, isContainer())
72
73#endif
74