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      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   ReplaceChars(label, "&", "&&", &ret);
     59   return ret;
     60 }
     61 
     62 }  // namespace ui
     63