1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (C) 2015 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/fonts/shaping/caching_word_shaper.h"
#include "third_party/blink/renderer/platform/fonts/character_range.h"
#include "third_party/blink/renderer/platform/fonts/shaping/caching_word_shape_iterator.h"
#include "third_party/blink/renderer/platform/fonts/shaping/harfbuzz_shaper.h"
#include "third_party/blink/renderer/platform/fonts/shaping/shape_cache.h"
#include "third_party/blink/renderer/platform/fonts/shaping/shape_result_buffer.h"
#include "third_party/blink/renderer/platform/fonts/simple_font_data.h"
#include "third_party/blink/renderer/platform/fonts/text_run_paint_info.h"
#include "third_party/blink/renderer/platform/wtf/text/character_names.h"
namespace blink {
ShapeCache* CachingWordShaper::GetShapeCache() const {
return font_.GetShapeCache();
}
// Returns the total advance width of the TextRun run. If glyph_bounds
// is specified it constructs on it the smallest bounding box covering all ink.
float CachingWordShaper::Width(const TextRun& run,
HashSet<const SimpleFontData*>* fallback_fonts,
FloatRect* glyph_bounds) {
float width = 0;
scoped_refptr<const ShapeResult> word_result;
CachingWordShapeIterator iterator(GetShapeCache(), run, &font_);
while (iterator.Next(&word_result)) {
if (word_result) {
// For every word_result we need to accumulate its width to adjust the
// glyph_bounds. When the word_result is in RTL we accumulate in the
// opposite direction (negative).
if (run.Rtl())
width -= word_result->Width();
if (glyph_bounds) {
FloatRect adjusted_bounds = word_result->DeprecatedInkBounds();
// Translate glyph bounds to the current glyph position which
// is the total width before this glyph.
adjusted_bounds.SetX(adjusted_bounds.X() + width);
glyph_bounds->Unite(adjusted_bounds);
}
if (!run.Rtl())
width += word_result->Width();
if (fallback_fonts)
word_result->FallbackFonts(fallback_fonts);
}
}
if (run.Rtl()) {
// Finally, convert width back to positive if run is RTL.
width = -width;
if (glyph_bounds) {
glyph_bounds->SetX(glyph_bounds->X() + width);
}
}
return width;
}
static inline float ShapeResultsForRun(ShapeCache* shape_cache,
const Font* font,
const TextRun& run,
ShapeResultBuffer* results_buffer) {
CachingWordShapeIterator iterator(shape_cache, run, font);
scoped_refptr<const ShapeResult> word_result;
float total_width = 0;
while (iterator.Next(&word_result)) {
if (word_result) {
total_width += word_result->Width();
results_buffer->AppendResult(std::move(word_result));
}
}
return total_width;
}
int CachingWordShaper::OffsetForPosition(
const TextRun& run,
float target_x,
IncludePartialGlyphsOption partial_glyphs,
BreakGlyphsOption break_glyphs) {
ShapeResultBuffer buffer;
ShapeResultsForRun(GetShapeCache(), &font_, run, &buffer);
return buffer.OffsetForPosition(run, target_x, partial_glyphs, break_glyphs);
}
void CachingWordShaper::FillResultBuffer(const TextRunPaintInfo& run_info,
ShapeResultBuffer* buffer) {
DCHECK(buffer);
ShapeResultsForRun(GetShapeCache(), &font_, run_info.run, buffer);
}
CharacterRange CachingWordShaper::GetCharacterRange(const TextRun& run,
unsigned from,
unsigned to) {
ShapeResultBuffer buffer;
float total_width = ShapeResultsForRun(GetShapeCache(), &font_, run, &buffer);
return buffer.GetCharacterRange(run.ToStringView(), run.Direction(),
total_width, from, to);
}
Vector<CharacterRange> CachingWordShaper::IndividualCharacterRanges(
const TextRun& run) {
ShapeResultBuffer buffer;
float total_width = ShapeResultsForRun(GetShapeCache(), &font_, run, &buffer);
auto ranges = buffer.IndividualCharacterRanges(run.Direction(), total_width);
// The shaper can fail to return glyph metrics for all characters (see
// crbug.com/613915 and crbug.com/615661) so add empty ranges to ensure all
// characters have an associated range.
while (ranges.size() < static_cast<unsigned>(run.length()))
ranges.push_back(CharacterRange(0, 0, 0, 0));
return ranges;
}
Vector<double> CachingWordShaper::IndividualCharacterAdvances(
const TextRun& run) {
ShapeResultBuffer buffer;
float total_width = ShapeResultsForRun(GetShapeCache(), &font_, run, &buffer);
return buffer.IndividualCharacterAdvances(run.ToStringView(), run.Direction(),
total_width);
}
Vector<ShapeResult::RunFontData> CachingWordShaper::GetRunFontData(
const TextRun& run) const {
ShapeResultBuffer buffer;
ShapeResultsForRun(GetShapeCache(), &font_, run, &buffer);
return buffer.GetRunFontData();
}
GlyphData CachingWordShaper::EmphasisMarkGlyphData(
const TextRun& emphasis_mark_run) const {
ShapeResultBuffer buffer;
ShapeResultsForRun(GetShapeCache(), &font_, emphasis_mark_run, &buffer);
return buffer.EmphasisMarkGlyphData(font_.GetFontDescription());
}
} // namespace blink
|
