ui/gfx/text_utils.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/text_utils.h"
   6
   7 #include "base/i18n/char_iterator.h"
   8
   9 namespace gfx {
  10
  11 base::string16 RemoveAcceleratorChar(const base::string16& s,
  12                                      base::char16 accelerator_char,
  13                                      int* accelerated_char_pos,
  14                                      int* accelerated_char_span) {
  15   bool escaped = false;
  16   ptrdiff_t last_char_pos = -1;
  17   int last_char_span = 0;
  18   base::i18n::UTF16CharIterator chars(&s);
  19   base::string16 accelerator_removed;
  20
  21   accelerator_removed.reserve(s.size());
  22   while (!chars.end()) {
  23     int32 c = chars.get();
  24     int array_pos = chars.array_pos();
  25     chars.Advance();
  26
  27     if (c != accelerator_char || escaped) {
  28       int span = chars.array_pos() - array_pos;
  29       if (escaped && c != accelerator_char) {
  30         last_char_pos = accelerator_removed.size();
  31         last_char_span = span;
  32       }
  33       for (int i = 0; i < span; i++)
  34         accelerator_removed.push_back(s[array_pos + i]);
  35       escaped = false;
  36     } else {
  37       escaped = true;
  38     }
  39   }
  40
  41   if (accelerated_char_pos)
  42     *accelerated_char_pos = last_char_pos;
  43   if (accelerated_char_span)
  44     *accelerated_char_span = last_char_span;
  45
  46   return accelerator_removed;
  47 }
  48
  49 }  // namespace gfx