1/*
2 * Copyright (C) 2016 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#include "Node.h"
29#include "StyleChange.h"
30#include <wtf/HashMap.h>
31#include <wtf/HashSet.h>
32#include <wtf/ListHashSet.h>
33
34namespace WebCore {
35
36class ContainerNode;
37class Document;
38class Element;
39class Node;
40class RenderStyle;
41class Text;
42
43namespace Style {
44
45struct ElementUpdate {
46 std::unique_ptr<RenderStyle> style;
47 Change change { NoChange };
48 bool recompositeLayer { false };
49};
50
51enum class DescendantsToResolve { None, ChildrenWithExplicitInherit, Children, All };
52
53struct ElementUpdates {
54 ElementUpdate update;
55 DescendantsToResolve descendantsToResolve { DescendantsToResolve::None };
56 Optional<ElementUpdate> beforePseudoElementUpdate;
57 Optional<ElementUpdate> afterPseudoElementUpdate;
58};
59
60struct TextUpdate {
61 unsigned offset { 0 };
62 unsigned length { std::numeric_limits<unsigned>::max() };
63 Optional<std::unique_ptr<RenderStyle>> inheritedDisplayContentsStyle;
64};
65
66class Update {
67 WTF_MAKE_FAST_ALLOCATED;
68public:
69 Update(Document&);
70
71 const ListHashSet<ContainerNode*>& roots() const { return m_roots; }
72
73 const ElementUpdates* elementUpdates(const Element&) const;
74 ElementUpdates* elementUpdates(const Element&);
75
76 const TextUpdate* textUpdate(const Text&) const;
77
78 const RenderStyle* elementStyle(const Element&) const;
79 RenderStyle* elementStyle(const Element&);
80
81 const Document& document() const { return m_document; }
82
83 unsigned size() const { return m_elements.size() + m_texts.size(); }
84
85 void addElement(Element&, Element* parent, ElementUpdates&&);
86 void addText(Text&, Element* parent, TextUpdate&&);
87 void addText(Text&, TextUpdate&&);
88
89private:
90 void addPossibleRoot(Element*);
91
92 Document& m_document;
93 ListHashSet<ContainerNode*> m_roots;
94 HashMap<const Element*, ElementUpdates> m_elements;
95 HashMap<const Text*, TextUpdate> m_texts;
96};
97
98}
99}
100