ui/base/accelerators/menu_label_accelerator_util_linux.cc

   1 // Copyright 2013 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/base/accelerators/menu_label_accelerator_util_linux.h"
   6
   7 #include "base/strings/string_util.h"
   8
   9 namespace {
  10
  11 // Common implementation of ConvertAcceleratorsFromWindowsStyle() and
  12 // RemoveWindowsStyleAccelerators().
  13 // Replaces all ampersands (as used in our grd files to indicate mnemonics)
  14 // to |target|, except ampersands appearing in pairs which are replaced by
  15 // a single ampersand. Any underscores get replaced with two underscores as
  16 // is needed by GTK.
  17 std::string ConvertAmpersandsTo(const std::string& label,
  18                                 const std::string& target) {
  19   std::string ret;
  20   ret.reserve(label.length() * 2);
  21   for (size_t i = 0; i < label.length(); ++i) {
  22     if ('_' == label[i]) {
  23       ret.push_back('_');
  24       ret.push_back('_');
  25     } else if ('&' == label[i]) {
  26       if (i + 1 < label.length() && '&' == label[i + 1]) {
  27         ret.push_back('&');
  28         ++i;
  29       } else {
  30         ret.append(target);
  31       }
  32     } else {
  33       ret.push_back(label[i]);
  34     }
  35   }
  36
  37   return ret;
  38 }
  39
  40 }  // namespace
  41
  42 namespace ui {
  43
  44 std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label) {
  45   return ConvertAmpersandsTo(label, "_");
  46 }
  47
  48 std::string RemoveWindowsStyleAccelerators(const std::string& label) {
  49   return ConvertAmpersandsTo(label, std::string());
  50 }
  51
  52 // Replaces all ampersands in |label| with two ampersands. This effectively
  53 // escapes strings for later processing by ConvertAmpersandsTo(), so that
  54 // ConvertAmpersandsTo(EscapeWindowsStyleAccelerators(x), *) is |x| with
  55 // underscores doubled, making the string that appears to the user just |x|.
  56 std::string EscapeWindowsStyleAccelerators(const std::string& label) {
  57   std::string ret;
  58   base::ReplaceChars(label, "&", "&&", &ret);
  59   return ret;
  60 }
  61
  62 }  // namespace ui