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 "FloatingState.h"
31#include "FormattingContext.h"
32#include "LayoutBox.h"
33#include "LayoutState.h"
34#include "LayoutUnit.h"
35#include <wtf/IsoMalloc.h>
36
37namespace WebCore {
38
39namespace Layout {
40
41class Box;
42enum class StyleDiff;
43
44class FormattingState {
45 WTF_MAKE_ISO_ALLOCATED(FormattingState);
46public:
47 virtual ~FormattingState();
48
49 FloatingState& floatingState() const { return m_floatingState; }
50
51 void markNeedsLayout(const Box&, StyleDiff);
52 bool needsLayout(const Box&);
53
54 void setIntrinsicWidthConstraints(const Box&, FormattingContext::IntrinsicWidthConstraints);
55 void clearIntrinsicWidthConstraints(const Box&);
56 Optional<FormattingContext::IntrinsicWidthConstraints> intrinsicWidthConstraints(const Box&) const;
57
58 bool isBlockFormattingState() const { return m_type == Type::Block; }
59 bool isInlineFormattingState() const { return m_type == Type::Inline; }
60
61 LayoutState& layoutState() const { return m_layoutState; }
62
63protected:
64 enum class Type { Block, Inline };
65 FormattingState(Ref<FloatingState>&&, Type, LayoutState&);
66
67private:
68 LayoutState& m_layoutState;
69 Ref<FloatingState> m_floatingState;
70 HashMap<const Box*, FormattingContext::IntrinsicWidthConstraints> m_intrinsicWidthConstraints;
71 Type m_type;
72};
73
74inline void FormattingState::setIntrinsicWidthConstraints(const Box& layoutBox, FormattingContext::IntrinsicWidthConstraints intrinsicWidthConstraints)
75{
76 ASSERT(!m_intrinsicWidthConstraints.contains(&layoutBox));
77 ASSERT(&m_layoutState.formattingStateForBox(layoutBox) == this);
78 m_intrinsicWidthConstraints.set(&layoutBox, intrinsicWidthConstraints);
79}
80
81inline void FormattingState::clearIntrinsicWidthConstraints(const Box& layoutBox)
82{
83 m_intrinsicWidthConstraints.remove(&layoutBox);
84}
85
86inline Optional<FormattingContext::IntrinsicWidthConstraints> FormattingState::intrinsicWidthConstraints(const Box& layoutBox) const
87{
88 ASSERT(&m_layoutState.formattingStateForBox(layoutBox) == this);
89 auto iterator = m_intrinsicWidthConstraints.find(&layoutBox);
90 if (iterator == m_intrinsicWidthConstraints.end())
91 return { };
92 return iterator->value;
93}
94
95}
96}
97
98#define SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_STATE(ToValueTypeName, predicate) \
99SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
100 static bool isType(const WebCore::Layout::FormattingState& formattingState) { return formattingState.predicate; } \
101SPECIALIZE_TYPE_TRAITS_END()
102
103#endif
104