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Side by Side Diff: base/i18n/bidi_line_iterator.h

Issue 1641513004: Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2 (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 10 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 BASE_I18N_BIDI_LINE_ITERATOR_H_ 5 #ifndef BASE_I18N_BIDI_LINE_ITERATOR_H_
6 #define BASE_I18N_BIDI_LINE_ITERATOR_H_ 6 #define BASE_I18N_BIDI_LINE_ITERATOR_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/i18n/base_i18n_export.h" 9 #include "base/i18n/base_i18n_export.h"
10 #include "base/i18n/rtl.h"
10 #include "base/strings/string16.h" 11 #include "base/strings/string16.h"
11 #include "third_party/icu/source/common/unicode/ubidi.h" 12 #include "third_party/icu/source/common/unicode/ubidi.h"
12 13
13 namespace base { 14 namespace base {
14 namespace i18n { 15 namespace i18n {
15 16
16 // A simple wrapper class for the bidirectional iterator of ICU. 17 // A simple wrapper class for the bidirectional iterator of ICU.
17 // This class uses the bidirectional iterator of ICU to split a line of 18 // This class uses the bidirectional iterator of ICU to split a line of
18 // bidirectional texts into visual runs in its display order. 19 // bidirectional texts into visual runs in its display order.
19 class BASE_I18N_EXPORT BiDiLineIterator { 20 class BASE_I18N_EXPORT BiDiLineIterator {
20 public: 21 public:
21 BiDiLineIterator(); 22 BiDiLineIterator();
22 ~BiDiLineIterator(); 23 ~BiDiLineIterator();
23 24
24 // Initializes the bidirectional iterator with the specified text. Returns 25 // Initializes the bidirectional iterator with the specified text. Returns
25 // whether initialization succeeded. 26 // whether initialization succeeded.
26 bool Open(const string16& text, bool right_to_left); 27 bool Open(const string16& text, TextDirection direction);
27 28
28 // Returns the number of visual runs in the text, or zero on error. 29 // Returns the number of visual runs in the text, or zero on error.
29 int CountRuns(); 30 int CountRuns();
30 31
31 // Gets the logical offset, length, and direction of the specified visual run. 32 // Gets the logical offset, length, and direction of the specified visual run.
32 UBiDiDirection GetVisualRun(int index, int* start, int* length); 33 UBiDiDirection GetVisualRun(int index, int* start, int* length);
33 34
34 // Given a start position, figure out where the run ends (and the BiDiLevel). 35 // Given a start position, figure out where the run ends (and the BiDiLevel).
35 void GetLogicalRun(int start, int* end, UBiDiLevel* level); 36 void GetLogicalRun(int start, int* end, UBiDiLevel* level);
36 37
37 private: 38 private:
38 UBiDi* bidi_; 39 UBiDi* bidi_;
39 40
40 DISALLOW_COPY_AND_ASSIGN(BiDiLineIterator); 41 DISALLOW_COPY_AND_ASSIGN(BiDiLineIterator);
41 }; 42 };
42 43
43 } // namespace i18n 44 } // namespace i18n
44 } // namespace base 45 } // namespace base
45 46
46 #endif // BASE_I18N_BIDI_LINE_ITERATOR_H_ 47 #endif // BASE_I18N_BIDI_LINE_ITERATOR_H_
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