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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 NGInlineItemsBuilder_h | 5 #ifndef NGInlineItemsBuilder_h |
6 #define NGInlineItemsBuilder_h | 6 #define NGInlineItemsBuilder_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "core/layout/ng/inline/ng_inline_node.h" | 9 #include "core/layout/ng/inline/ng_inline_node.h" |
10 #include "platform/wtf/Allocator.h" | 10 #include "platform/wtf/Allocator.h" |
11 #include "platform/wtf/Vector.h" | 11 #include "platform/wtf/Vector.h" |
12 #include "platform/wtf/text/StringBuilder.h" | 12 #include "platform/wtf/text/StringBuilder.h" |
13 #include "platform/wtf/text/WTFString.h" | 13 #include "platform/wtf/text/WTFString.h" |
14 | 14 |
15 namespace blink { | 15 namespace blink { |
16 | 16 |
17 class ComputedStyle; | 17 class ComputedStyle; |
18 class LayoutObject; | 18 class LayoutObject; |
19 class NGInlineItem; | 19 class NGInlineItem; |
20 | 20 |
21 // NGInlineItemsBuilder builds a string and a list of NGInlineItem from inlines. | 21 // NGInlineItemsBuilder builds a string and a list of NGInlineItem from inlines. |
22 // | 22 // |
23 // When appending, spaces are collapsed according to CSS Text, The white space | 23 // When appending, spaces are collapsed according to CSS Text, The white space |
24 // processing rules | 24 // processing rules |
25 // https://drafts.csswg.org/css-text-3/#white-space-rules | 25 // https://drafts.csswg.org/css-text-3/#white-space-rules |
26 // | 26 // |
27 // By calling EnterInline/ExitInline, it inserts bidirectional control | 27 // By calling EnterInline/ExitInline, it inserts bidirectional control |
28 // characters as defined in: | 28 // characters as defined in: |
29 // https://drafts.csswg.org/css-writing-modes-3/#bidi-control-codes-injection-ta ble | 29 // https://drafts.csswg.org/css-writing-modes-3/#bidi-control-codes-injection-ta ble |
30 // | |
31 // Optionally, NGInlineItemsBuilder takes parameter |collapsed_indexes| to | |
32 // return how spaces are collapsed. For each string appended to | |
33 // NGInlineItemsBuilder, a Vector<unsigned> will be added to | |
34 // |collapsed_indexes|, storing the indexes of all collapsed spaces in sorted | |
35 // order. See the unit tests for examples. | |
30 class CORE_EXPORT NGInlineItemsBuilder { | 36 class CORE_EXPORT NGInlineItemsBuilder { |
31 STACK_ALLOCATED(); | 37 STACK_ALLOCATED(); |
32 | 38 |
33 public: | 39 public: |
34 explicit NGInlineItemsBuilder(Vector<NGInlineItem>* items) : items_(items) {} | 40 explicit NGInlineItemsBuilder(Vector<NGInlineItem>* items) |
41 : items_(items), collapsed_indexes_(nullptr) {} | |
42 explicit NGInlineItemsBuilder(Vector<NGInlineItem>* items, | |
43 Vector<Vector<unsigned>>* collapsed_indexes) | |
44 : items_(items), collapsed_indexes_(collapsed_indexes) {} | |
35 ~NGInlineItemsBuilder(); | 45 ~NGInlineItemsBuilder(); |
36 | 46 |
37 String ToString(); | 47 String ToString(); |
38 | 48 |
39 void SetIsSVGText(bool value) { is_svgtext_ = value; } | 49 void SetIsSVGText(bool value) { is_svgtext_ = value; } |
40 | 50 |
41 // Returns whether the items contain any Bidi controls. | 51 // Returns whether the items contain any Bidi controls. |
42 bool HasBidiControls() const { return has_bidi_controls_; } | 52 bool HasBidiControls() const { return has_bidi_controls_; } |
43 | 53 |
44 // Append a string. | 54 // Append a string. |
(...skipping 40 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
85 UChar character; | 95 UChar character; |
86 } OnExitNode; | 96 } OnExitNode; |
87 Vector<OnExitNode> exits_; | 97 Vector<OnExitNode> exits_; |
88 | 98 |
89 enum class CollapsibleSpace { kNone, kSpace, kNewline }; | 99 enum class CollapsibleSpace { kNone, kSpace, kNewline }; |
90 | 100 |
91 CollapsibleSpace last_collapsible_space_ = CollapsibleSpace::kSpace; | 101 CollapsibleSpace last_collapsible_space_ = CollapsibleSpace::kSpace; |
92 bool is_svgtext_ = false; | 102 bool is_svgtext_ = false; |
93 bool has_bidi_controls_ = false; | 103 bool has_bidi_controls_ = false; |
94 | 104 |
105 // When provided, the indexes of collapsed spaces in each appended string will | |
106 // be eventually added to |collapsed_indexes_|. | |
107 Vector<Vector<unsigned>>* collapsed_indexes_; | |
yosin_UTC9
2017/06/21 04:22:41
Could you introduce OffsetMappingBuilder class to
kojii
2017/06/21 09:47:13
I take this opposite. Since this is tightly couple
Xiaocheng
2017/06/21 18:15:06
I agree with yosin@ that it's a better pattern if
| |
108 // Length of each appended string. Used only for computing the indexes of | |
109 // collapsed spaces when |collapsed_indexes_| is provided. | |
110 Vector<unsigned> input_strings_lengths_; | |
111 | |
95 void AppendWithWhiteSpaceCollapsing(const String&, | 112 void AppendWithWhiteSpaceCollapsing(const String&, |
96 unsigned start, | 113 unsigned start, |
97 unsigned end, | 114 unsigned end, |
98 const ComputedStyle*, | 115 const ComputedStyle*, |
99 LayoutObject*); | 116 LayoutObject*); |
100 void AppendWithoutWhiteSpaceCollapsing(const String&, | 117 void AppendWithoutWhiteSpaceCollapsing(const String&, |
101 const ComputedStyle*, | 118 const ComputedStyle*, |
102 LayoutObject*); | 119 LayoutObject*); |
103 void AppendWithPreservingNewlines(const String&, | 120 void AppendWithPreservingNewlines(const String&, |
104 const ComputedStyle*, | 121 const ComputedStyle*, |
105 LayoutObject*); | 122 LayoutObject*); |
106 | 123 |
107 void AppendForcedBreak(const ComputedStyle*, LayoutObject*); | 124 void AppendForcedBreak(const ComputedStyle*, LayoutObject*, unsigned); |
108 | 125 |
109 // Because newlines may be removed depends on following characters, newlines | 126 // Because newlines may be removed depends on following characters, newlines |
110 // at the end of input string is not added to |text_| but instead | 127 // at the end of input string is not added to |text_| but instead |
111 // |has_pending_newline_| flag is set. | 128 // |has_pending_newline_| flag is set. |
112 // This function determines whether to add the newline or ignore. | 129 // This function determines whether to add the newline or ignore. |
113 void ProcessPendingNewline(const String&, const ComputedStyle*); | 130 void ProcessPendingNewline(const String&, const ComputedStyle*); |
114 | 131 |
115 // Removes the collapsible space at the end of |text_| if exists. | 132 // Removes the collapsible space at the end of |text_| if exists. |
116 void RemoveTrailingCollapsibleSpaceIfExists(unsigned*); | 133 void RemoveTrailingCollapsibleSpaceIfExists(unsigned*, unsigned); |
117 void RemoveTrailingCollapsibleSpace(unsigned*); | 134 void RemoveTrailingCollapsibleSpace(unsigned*, unsigned); |
118 | 135 |
119 void RemoveTrailingCollapsibleNewlineIfNeeded(unsigned*, | 136 void RemoveTrailingCollapsibleNewlineIfNeeded(unsigned*, |
120 const String&, | 137 const String&, |
121 unsigned, | 138 unsigned, |
122 const ComputedStyle*); | 139 const ComputedStyle*); |
123 | 140 |
141 void AddLastTrailingSpaceToRemovedIndexes(unsigned); | |
142 | |
124 void Enter(LayoutObject*, UChar); | 143 void Enter(LayoutObject*, UChar); |
125 void Exit(LayoutObject*); | 144 void Exit(LayoutObject*); |
126 }; | 145 }; |
127 | 146 |
128 } // namespace blink | 147 } // namespace blink |
129 | 148 |
130 #endif // NGInlineItemsBuilder_h | 149 #endif // NGInlineItemsBuilder_h |
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