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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 NGLineBuilder_h | 5 #ifndef NGLineBuilder_h |
6 #define NGLineBuilder_h | 6 #define NGLineBuilder_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/layout/ng/geometry/ng_logical_offset.h" | 9 #include "core/layout/ng/geometry/ng_logical_offset.h" |
10 #include "core/layout/ng/ng_fragment_builder.h" | 10 #include "core/layout/ng/ng_fragment_builder.h" |
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79 | 79 |
80 // Create fragments for all lines created so far. | 80 // Create fragments for all lines created so far. |
81 RefPtr<NGLayoutResult> CreateFragments(); | 81 RefPtr<NGLayoutResult> CreateFragments(); |
82 | 82 |
83 // Copy fragment data of all lines created by this NGLineBuilder to | 83 // Copy fragment data of all lines created by this NGLineBuilder to |
84 // LayoutBlockFlow. | 84 // LayoutBlockFlow. |
85 // This must run after |CreateFragments()|, and after the fragments it created | 85 // This must run after |CreateFragments()|, and after the fragments it created |
86 // are placed. | 86 // are placed. |
87 void CopyFragmentDataToLayoutBlockFlow(); | 87 void CopyFragmentDataToLayoutBlockFlow(); |
88 | 88 |
| 89 // Compute inline size of an NGLayoutInlineItem. |
| 90 // Same as NGLayoutInlineItem::InlineSize(), except that this function can |
| 91 // compute atomic inlines by performing layout. |
| 92 LayoutUnit InlineSize(const NGLayoutInlineItem&); |
| 93 |
89 private: | 94 private: |
| 95 bool IsHorizontalWritingMode() const { return is_horizontal_writing_mode_; } |
| 96 |
| 97 LayoutUnit InlineSize(const NGLayoutInlineItem&, |
| 98 unsigned start_offset, |
| 99 unsigned end_offset); |
| 100 LayoutUnit InlineSizeFromLayout(const NGLayoutInlineItem&); |
| 101 const NGLayoutResult* LayoutItem(const NGLayoutInlineItem&); |
| 102 |
90 struct LineItemChunk { | 103 struct LineItemChunk { |
91 unsigned index; | 104 unsigned index; |
92 unsigned start_offset; | 105 unsigned start_offset; |
93 unsigned end_offset; | 106 unsigned end_offset; |
94 LayoutUnit inline_size; | 107 LayoutUnit inline_size; |
95 }; | 108 }; |
96 | 109 |
97 void BidiReorder(Vector<LineItemChunk, 32>*); | 110 void BidiReorder(Vector<LineItemChunk, 32>*); |
98 | 111 |
99 // Represents block-direction metrics for an |NGLayoutInlineItem|. | 112 // Represents block-direction metrics for an |NGLayoutInlineItem|. |
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129 float max_descent_and_leading = 0; | 142 float max_descent_and_leading = 0; |
130 | 143 |
131 // Include |InlineItemMetrics| into the metrics for this line box. | 144 // Include |InlineItemMetrics| into the metrics for this line box. |
132 void UpdateMaxAscentAndDescent(const InlineItemMetrics&); | 145 void UpdateMaxAscentAndDescent(const InlineItemMetrics&); |
133 }; | 146 }; |
134 | 147 |
135 void PlaceItems(const Vector<LineItemChunk, 32>&); | 148 void PlaceItems(const Vector<LineItemChunk, 32>&); |
136 void AccumulateUsedFonts(const NGLayoutInlineItem&, | 149 void AccumulateUsedFonts(const NGLayoutInlineItem&, |
137 const LineItemChunk&, | 150 const LineItemChunk&, |
138 LineBoxData*); | 151 LineBoxData*); |
| 152 LayoutUnit PlaceAtomicInline(const NGLayoutInlineItem&, |
| 153 LayoutUnit estimated_baseline, |
| 154 LineBoxData*, |
| 155 NGFragmentBuilder*); |
139 | 156 |
140 // Finds the next layout opportunity for the next text fragment. | 157 // Finds the next layout opportunity for the next text fragment. |
141 void FindNextLayoutOpportunity(); | 158 void FindNextLayoutOpportunity(); |
142 | 159 |
143 Persistent<NGInlineNode> inline_box_; | 160 Persistent<NGInlineNode> inline_box_; |
144 NGConstraintSpace* constraint_space_; // Not owned as STACK_ALLOCATED. | 161 NGConstraintSpace* constraint_space_; // Not owned as STACK_ALLOCATED. |
145 NGFragmentBuilder* containing_block_builder_; | 162 NGFragmentBuilder* containing_block_builder_; |
| 163 Vector<RefPtr<NGLayoutResult>, 32> layout_results_; |
146 Vector<LineBoxData, 32> line_box_data_list_; | 164 Vector<LineBoxData, 32> line_box_data_list_; |
147 unsigned start_index_ = 0; | 165 unsigned start_index_ = 0; |
148 unsigned start_offset_ = 0; | 166 unsigned start_offset_ = 0; |
149 unsigned last_index_ = 0; | 167 unsigned last_index_ = 0; |
150 unsigned end_offset_ = 0; | 168 unsigned end_offset_ = 0; |
151 unsigned last_break_opportunity_index_ = 0; | 169 unsigned last_break_opportunity_index_ = 0; |
152 unsigned last_break_opportunity_offset_ = 0; | 170 unsigned last_break_opportunity_offset_ = 0; |
153 LayoutUnit end_position_; | 171 LayoutUnit end_position_; |
154 LayoutUnit last_break_opportunity_position_; | 172 LayoutUnit last_break_opportunity_position_; |
155 LayoutUnit content_size_; | 173 LayoutUnit content_size_; |
156 LayoutUnit max_inline_size_; | 174 LayoutUnit max_inline_size_; |
157 FontBaseline baseline_type_; | |
158 NGFragmentBuilder container_builder_; | 175 NGFragmentBuilder container_builder_; |
159 RefPtr<NGLayoutResult> container_layout_result_; | 176 RefPtr<NGLayoutResult> container_layout_result_; |
| 177 FontBaseline baseline_type_ = FontBaseline::AlphabeticBaseline; |
160 | 178 |
161 NGLogicalOffset bfc_offset_; | 179 NGLogicalOffset bfc_offset_; |
162 NGLogicalRect current_opportunity_; | 180 NGLogicalRect current_opportunity_; |
163 | 181 |
| 182 unsigned is_horizontal_writing_mode_ : 1; |
164 #if DCHECK_IS_ON() | 183 #if DCHECK_IS_ON() |
165 unsigned is_bidi_reordered_ : 1; | 184 unsigned is_bidi_reordered_ : 1; |
166 #endif | 185 #endif |
167 }; | 186 }; |
168 | 187 |
169 } // namespace blink | 188 } // namespace blink |
170 | 189 |
171 #endif // NGLineBuilder_h | 190 #endif // NGLineBuilder_h |
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