ui/gfx/text_utils.h

   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 #ifndef UI_GFX_TEXT_UTILS_H_
   6 #define UI_GFX_TEXT_UTILS_H_
   7
   8 #include "base/strings/string16.h"
   9 #include "ui/gfx/gfx_export.h"
  10
  11 namespace gfx {
  12
  13 class FontList;
  14
  15 // Strip the accelerator char (typically '&') from a menu string.  A double
  16 // accelerator char ('&&') will be converted to a single char.  The out params
  17 // |accelerated_char_pos| and |accelerated_char_span| will be set to the index
  18 // and span of the last accelerated character, respectively, or -1 and 0 if
  19 // there was none.
  20 GFX_EXPORT base::string16 RemoveAcceleratorChar(const base::string16& s,
  21                                                 base::char16 accelerator_char,
  22                                                 int* accelerated_char_pos,
  23                                                 int* accelerated_char_span);
  24
  25 // Returns the number of horizontal pixels needed to display the specified
  26 // |text| with |font_list|.
  27 GFX_EXPORT int GetStringWidth(const base::string16& text,
  28                               const FontList& font_list);
  29
  30 // This is same as GetStringWidth except that fractional width is returned.
  31 GFX_EXPORT float GetStringWidthF(const base::string16& text,
  32                                  const FontList& font_list);
  33
  34 // Returns a valid cut boundary at or before |index|. The surrogate pair and
  35 // combining characters should not be separated.
  36 GFX_EXPORT size_t
  37 FindValidBoundaryBefore(const base::string16& text, size_t index);
  38
  39 // Returns a valid cut boundary at or after |index|. The surrogate pair and
  40 // combining characters should not be separated.
  41 GFX_EXPORT size_t
  42 FindValidBoundaryAfter(const base::string16& text, size_t index);
  43
  44 }  // namespace gfx
  45
  46 #endif  // UI_GFX_TEXT_UTILS_H_