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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #include "ui/gfx/render_text_harfbuzz.h" | 5 #include "ui/gfx/render_text_harfbuzz.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "base/i18n/bidi_line_iterator.h" | 9 #include "base/i18n/bidi_line_iterator.h" |
10 #include "base/i18n/break_iterator.h" | 10 #include "base/i18n/break_iterator.h" |
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1260 // ensure that the fallback list covers the basic cases. | 1260 // ensure that the fallback list covers the basic cases. |
1261 // http://crbug.com/467459. On some Windows configurations the default font | 1261 // http://crbug.com/467459. On some Windows configurations the default font |
1262 // could be a raster font like System, which would not give us a reasonable | 1262 // could be a raster font like System, which would not give us a reasonable |
1263 // fallback font list. | 1263 // fallback font list. |
1264 std::vector<std::string> default_fallback_families = | 1264 std::vector<std::string> default_fallback_families = |
1265 GetFallbackFontFamilies("Segoe UI"); | 1265 GetFallbackFontFamilies("Segoe UI"); |
1266 fallback_families.insert(fallback_families.end(), | 1266 fallback_families.insert(fallback_families.end(), |
1267 default_fallback_families.begin(), default_fallback_families.end()); | 1267 default_fallback_families.begin(), default_fallback_families.end()); |
1268 #endif | 1268 #endif |
1269 | 1269 |
| 1270 // Get rid of duplicate fonts in the fallback list. We use the std::unique |
| 1271 // algorithm for this. However for this function to work we need to sort |
| 1272 // the font list as the unique algorithm relies on duplicates being adjacent. |
| 1273 // TODO(ananta) |
| 1274 // Sorting the list changes the order in which fonts are evaluated. This may |
| 1275 // cause problems in the way some characters appear. It may be best to do |
| 1276 // font fallback on the same lines as blink or skia which do this based on |
| 1277 // character glyph mapping. |
| 1278 std::sort(fallback_families.begin(), fallback_families.end()); |
| 1279 fallback_families.erase(std::unique( |
| 1280 fallback_families.begin(), fallback_families.end()), |
| 1281 fallback_families.end()); |
| 1282 |
1270 // Try shaping with the fallback fonts. | 1283 // Try shaping with the fallback fonts. |
1271 for (const auto& family : fallback_families) { | 1284 for (const auto& family : fallback_families) { |
1272 if (family == primary_family) | 1285 if (family == primary_family) |
1273 continue; | 1286 continue; |
1274 #if defined(OS_WIN) | 1287 #if defined(OS_WIN) |
1275 if (family == uniscribe_family) | 1288 if (family == uniscribe_family) |
1276 continue; | 1289 continue; |
1277 #endif | 1290 #endif |
1278 FontRenderParamsQuery query(false); | 1291 FontRenderParamsQuery query(false); |
1279 query.families.push_back(family); | 1292 query.families.push_back(family); |
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1478 DCHECK(!update_layout_run_list_); | 1491 DCHECK(!update_layout_run_list_); |
1479 DCHECK(!update_display_run_list_); | 1492 DCHECK(!update_display_run_list_); |
1480 return text_elided() ? display_run_list_.get() : &layout_run_list_; | 1493 return text_elided() ? display_run_list_.get() : &layout_run_list_; |
1481 } | 1494 } |
1482 | 1495 |
1483 const internal::TextRunList* RenderTextHarfBuzz::GetRunList() const { | 1496 const internal::TextRunList* RenderTextHarfBuzz::GetRunList() const { |
1484 return const_cast<RenderTextHarfBuzz*>(this)->GetRunList(); | 1497 return const_cast<RenderTextHarfBuzz*>(this)->GetRunList(); |
1485 } | 1498 } |
1486 | 1499 |
1487 } // namespace gfx | 1500 } // namespace gfx |
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