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Side by Side Diff: third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h

Issue 2612103004: [ng_layout] Rename NGFragmentBase,NGFragment,NGPhysicalFragment (Closed)
Patch Set: CR: rename ifdef guards Created 3 years, 11 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef NGFragmentBuilder_h 5 #ifndef NGFragmentBuilder_h
6 #define NGFragmentBuilder_h 6 #define NGFragmentBuilder_h
7 7
8 #include "core/layout/ng/ng_physical_fragment_base.h"
9 #include "core/layout/ng/ng_units.h" 8 #include "core/layout/ng/ng_units.h"
9 #include "core/layout/ng/ng_physical_fragment.h"
10 10
11 namespace blink { 11 namespace blink {
12 12
13 class NGFragmentBase; 13 class NGFragment;
14 class NGInlineNode; 14 class NGInlineNode;
15 class NGPhysicalFragment; 15 class NGPhysicalBoxFragment;
16 class NGPhysicalTextFragment; 16 class NGPhysicalTextFragment;
17 17
18 class CORE_EXPORT NGFragmentBuilder final 18 class CORE_EXPORT NGFragmentBuilder final
19 : public GarbageCollectedFinalized<NGFragmentBuilder> { 19 : public GarbageCollectedFinalized<NGFragmentBuilder> {
20 public: 20 public:
21 NGFragmentBuilder(NGPhysicalFragmentBase::NGFragmentType); 21 NGFragmentBuilder(NGPhysicalFragment::NGFragmentType);
22 22
23 using WeakBoxList = HeapLinkedHashSet<WeakMember<NGBlockNode>>; 23 using WeakBoxList = HeapLinkedHashSet<WeakMember<NGBlockNode>>;
24 24
25 NGFragmentBuilder& SetWritingMode(NGWritingMode); 25 NGFragmentBuilder& SetWritingMode(NGWritingMode);
26 NGFragmentBuilder& SetDirection(TextDirection); 26 NGFragmentBuilder& SetDirection(TextDirection);
27 27
28 NGFragmentBuilder& SetInlineSize(LayoutUnit); 28 NGFragmentBuilder& SetInlineSize(LayoutUnit);
29 NGFragmentBuilder& SetBlockSize(LayoutUnit); 29 NGFragmentBuilder& SetBlockSize(LayoutUnit);
30 NGLogicalSize Size() const { return size_; } 30 NGLogicalSize Size() const { return size_; }
31 31
32 NGFragmentBuilder& SetInlineOverflow(LayoutUnit); 32 NGFragmentBuilder& SetInlineOverflow(LayoutUnit);
33 NGFragmentBuilder& SetBlockOverflow(LayoutUnit); 33 NGFragmentBuilder& SetBlockOverflow(LayoutUnit);
34 34
35 NGFragmentBuilder& AddChild(NGFragmentBase*, const NGLogicalOffset&); 35 NGFragmentBuilder& AddChild(NGFragment*, const NGLogicalOffset&);
36 36
37 // Builder has non-trivial out-of-flow descendant methods. 37 // Builder has non-trivial out-of-flow descendant methods.
38 // These methods are building blocks for implementation of 38 // These methods are building blocks for implementation of
39 // out-of-flow descendants by layout algorithms. 39 // out-of-flow descendants by layout algorithms.
40 // 40 //
41 // They are intended to be used by layout algorithm like this: 41 // They are intended to be used by layout algorithm like this:
42 // 42 //
43 // Part 1: layout algorithm positions in-flow children. 43 // Part 1: layout algorithm positions in-flow children.
44 // out-of-flow children, and out-of-flow descendants of fragments 44 // out-of-flow children, and out-of-flow descendants of fragments
45 // are stored inside builder. 45 // are stored inside builder.
(...skipping 36 matching lines...) Expand 10 before | Expand all | Expand 10 after
82 const NGStaticPosition&); 82 const NGStaticPosition&);
83 83
84 // Sets MarginStrut for the resultant fragment. 84 // Sets MarginStrut for the resultant fragment.
85 NGFragmentBuilder& SetMarginStrutBlockStart(const NGMarginStrut& from); 85 NGFragmentBuilder& SetMarginStrutBlockStart(const NGMarginStrut& from);
86 NGFragmentBuilder& SetMarginStrutBlockEnd(const NGMarginStrut& from); 86 NGFragmentBuilder& SetMarginStrutBlockEnd(const NGMarginStrut& from);
87 87
88 // Offsets are not supposed to be set during fragment construction, so we 88 // Offsets are not supposed to be set during fragment construction, so we
89 // do not provide a setter here. 89 // do not provide a setter here.
90 90
91 // Creates the fragment. Can only be called once. 91 // Creates the fragment. Can only be called once.
92 NGPhysicalFragment* ToFragment(); 92 NGPhysicalBoxFragment* ToBoxFragment();
93 NGPhysicalTextFragment* ToTextFragment(NGInlineNode*, 93 NGPhysicalTextFragment* ToTextFragment(NGInlineNode*,
94 unsigned start_index, 94 unsigned start_index,
95 unsigned end_index); 95 unsigned end_index);
96 96
97 DECLARE_VIRTUAL_TRACE(); 97 DECLARE_VIRTUAL_TRACE();
98 98
99 private: 99 private:
100 // Out-of-flow descendant placement information. 100 // Out-of-flow descendant placement information.
101 // The generated fragment must compute NGStaticPosition for all 101 // The generated fragment must compute NGStaticPosition for all
102 // out-of-flow descendants. 102 // out-of-flow descendants.
103 // The resulting NGStaticPosition gets derived from: 103 // The resulting NGStaticPosition gets derived from:
104 // 1. The offset of fragment's child. 104 // 1. The offset of fragment's child.
105 // 2. The static position of descendant wrt child. 105 // 2. The static position of descendant wrt child.
106 // 106 //
107 // A child can be: 107 // A child can be:
108 // 1. A descendant itself. In this case, descendant position is (0,0). 108 // 1. A descendant itself. In this case, descendant position is (0,0).
109 // 2. A fragment containing a descendant. 109 // 2. A fragment containing a descendant.
110 // 110 //
111 // child_offset is stored as NGLogicalOffset because physical offset cannot 111 // child_offset is stored as NGLogicalOffset because physical offset cannot
112 // be computed until we know fragment's size. 112 // be computed until we know fragment's size.
113 struct OutOfFlowPlacement { 113 struct OutOfFlowPlacement {
114 NGLogicalOffset child_offset; 114 NGLogicalOffset child_offset;
115 NGStaticPosition descendant_position; 115 NGStaticPosition descendant_position;
116 }; 116 };
117 117
118 NGPhysicalFragmentBase::NGFragmentType type_; 118 NGPhysicalFragment::NGFragmentType type_;
119 NGWritingMode writing_mode_; 119 NGWritingMode writing_mode_;
120 TextDirection direction_; 120 TextDirection direction_;
121 121
122 NGLogicalSize size_; 122 NGLogicalSize size_;
123 NGLogicalSize overflow_; 123 NGLogicalSize overflow_;
124 124
125 NGMarginStrut margin_strut_; 125 NGMarginStrut margin_strut_;
126 126
127 HeapVector<Member<NGPhysicalFragmentBase>> children_; 127 HeapVector<Member<NGPhysicalFragment>> children_;
128 Vector<NGLogicalOffset> offsets_; 128 Vector<NGLogicalOffset> offsets_;
129 129
130 WeakBoxList out_of_flow_descendant_candidates_; 130 WeakBoxList out_of_flow_descendant_candidates_;
131 Vector<OutOfFlowPlacement> out_of_flow_candidate_placements_; 131 Vector<OutOfFlowPlacement> out_of_flow_candidate_placements_;
132 132
133 WeakBoxList out_of_flow_descendants_; 133 WeakBoxList out_of_flow_descendants_;
134 Vector<NGStaticPosition> out_of_flow_positions_; 134 Vector<NGStaticPosition> out_of_flow_positions_;
135 }; 135 };
136 136
137 } // namespace blink 137 } // namespace blink
138 138
139 #endif // NGFragmentBuilder 139 #endif // NGFragmentBuilder
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