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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/geometry/ng_static_position.h" | 8 #include "core/layout/ng/geometry/ng_static_position.h" |
9 #include "core/layout/ng/inline/ng_physical_text_fragment.h" | 9 #include "core/layout/ng/inline/ng_physical_text_fragment.h" |
10 #include "core/layout/ng/ng_break_token.h" | 10 #include "core/layout/ng/ng_break_token.h" |
11 #include "core/layout/ng/ng_constraint_space.h" | 11 #include "core/layout/ng/ng_constraint_space.h" |
| 12 #include "core/layout/ng/ng_layout_result.h" |
12 #include "core/layout/ng/ng_out_of_flow_positioned_descendant.h" | 13 #include "core/layout/ng/ng_out_of_flow_positioned_descendant.h" |
13 #include "core/layout/ng/ng_physical_fragment.h" | 14 #include "core/layout/ng/ng_physical_fragment.h" |
14 #include "core/layout/ng/ng_positioned_float.h" | 15 #include "core/layout/ng/ng_positioned_float.h" |
15 #include "core/layout/ng/ng_unpositioned_float.h" | 16 #include "core/layout/ng/ng_unpositioned_float.h" |
16 #include "platform/wtf/Allocator.h" | 17 #include "platform/wtf/Allocator.h" |
17 | 18 |
18 namespace blink { | 19 namespace blink { |
19 | 20 |
20 class NGLayoutResult; | |
21 | |
22 class CORE_EXPORT NGFragmentBuilder final { | 21 class CORE_EXPORT NGFragmentBuilder final { |
23 DISALLOW_NEW(); | 22 DISALLOW_NEW(); |
24 | 23 |
25 public: | 24 public: |
26 NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, NGLayoutInputNode); | 25 NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, NGLayoutInputNode); |
27 | 26 |
28 // Build a fragment for LayoutObject without NGLayoutInputNode. LayoutInline | 27 // Build a fragment for LayoutObject without NGLayoutInputNode. LayoutInline |
29 // has NGInlineItem but does not have corresponding NGLayoutInputNode. | 28 // has NGInlineItem but does not have corresponding NGLayoutInputNode. |
30 NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, LayoutObject*); | 29 NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, LayoutObject*); |
31 | 30 |
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42 NGFragmentBuilder& SetBlockOverflow(LayoutUnit); | 41 NGFragmentBuilder& SetBlockOverflow(LayoutUnit); |
43 | 42 |
44 NGFragmentBuilder& AddChild(RefPtr<NGLayoutResult>, const NGLogicalOffset&); | 43 NGFragmentBuilder& AddChild(RefPtr<NGLayoutResult>, const NGLogicalOffset&); |
45 NGFragmentBuilder& AddChild(RefPtr<NGPhysicalFragment>, | 44 NGFragmentBuilder& AddChild(RefPtr<NGPhysicalFragment>, |
46 const NGLogicalOffset&); | 45 const NGLogicalOffset&); |
47 | 46 |
48 NGFragmentBuilder& AddPositionedFloat(NGPositionedFloat); | 47 NGFragmentBuilder& AddPositionedFloat(NGPositionedFloat); |
49 | 48 |
50 NGFragmentBuilder& SetBfcOffset(const NGLogicalOffset& offset); | 49 NGFragmentBuilder& SetBfcOffset(const NGLogicalOffset& offset); |
51 | 50 |
52 NGFragmentBuilder& AddUnpositionedFloat( | |
53 RefPtr<NGUnpositionedFloat> unpositioned_float); | |
54 | |
55 // Builder has non-trivial out-of-flow descendant methods. | 51 // Builder has non-trivial out-of-flow descendant methods. |
56 // These methods are building blocks for implementation of | 52 // These methods are building blocks for implementation of |
57 // out-of-flow descendants by layout algorithms. | 53 // out-of-flow descendants by layout algorithms. |
58 // | 54 // |
59 // They are intended to be used by layout algorithm like this: | 55 // They are intended to be used by layout algorithm like this: |
60 // | 56 // |
61 // Part 1: layout algorithm positions in-flow children. | 57 // Part 1: layout algorithm positions in-flow children. |
62 // out-of-flow children, and out-of-flow descendants of fragments | 58 // out-of-flow children, and out-of-flow descendants of fragments |
63 // are stored inside builder. | 59 // are stored inside builder. |
64 // | 60 // |
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99 end_margin_strut_ = from; | 95 end_margin_strut_ = from; |
100 return *this; | 96 return *this; |
101 } | 97 } |
102 | 98 |
103 // Offsets are not supposed to be set during fragment construction, so we | 99 // Offsets are not supposed to be set during fragment construction, so we |
104 // do not provide a setter here. | 100 // do not provide a setter here. |
105 | 101 |
106 // Creates the fragment. Can only be called once. | 102 // Creates the fragment. Can only be called once. |
107 RefPtr<NGLayoutResult> ToBoxFragment(); | 103 RefPtr<NGLayoutResult> ToBoxFragment(); |
108 | 104 |
109 Vector<RefPtr<NGPhysicalFragment>>& MutableChildren() { return children_; } | 105 RefPtr<NGLayoutResult> Abort(NGLayoutResult::NGLayoutResultStatus); |
110 | 106 |
111 Vector<NGLogicalOffset>& MutableOffsets() { return offsets_; } | 107 Vector<NGLogicalOffset>& MutableOffsets() { return offsets_; } |
112 | 108 |
113 // Mutable list of floats that need to be positioned. | 109 void SwapUnpositionedFloats( |
114 Vector<RefPtr<NGUnpositionedFloat>>& MutableUnpositionedFloats() { | 110 Vector<RefPtr<NGUnpositionedFloat>>* unpositioned_floats) { |
115 return unpositioned_floats_; | 111 unpositioned_floats_.swap(*unpositioned_floats); |
116 } | |
117 | |
118 // List of floats that need to be positioned. | |
119 const Vector<RefPtr<NGUnpositionedFloat>>& UnpositionedFloats() const { | |
120 return unpositioned_floats_; | |
121 } | 112 } |
122 | 113 |
123 const WTF::Optional<NGLogicalOffset>& BfcOffset() const { | 114 const WTF::Optional<NGLogicalOffset>& BfcOffset() const { |
124 return bfc_offset_; | 115 return bfc_offset_; |
125 } | 116 } |
126 | 117 |
127 const Vector<RefPtr<NGPhysicalFragment>>& Children() const { | 118 const Vector<RefPtr<NGPhysicalFragment>>& Children() const { |
128 return children_; | 119 return children_; |
129 } | 120 } |
130 | 121 |
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186 | 177 |
187 WTF::Optional<NGLogicalOffset> bfc_offset_; | 178 WTF::Optional<NGLogicalOffset> bfc_offset_; |
188 NGMarginStrut end_margin_strut_; | 179 NGMarginStrut end_margin_strut_; |
189 | 180 |
190 NGBorderEdges border_edges_; | 181 NGBorderEdges border_edges_; |
191 }; | 182 }; |
192 | 183 |
193 } // namespace blink | 184 } // namespace blink |
194 | 185 |
195 #endif // NGFragmentBuilder | 186 #endif // NGFragmentBuilder |
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