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
9namespace {
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.
17std::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
42namespace ui {
43
44std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label) {
45  return ConvertAmpersandsTo(label, "_");
46}
47
48std::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|.
56std::string EscapeWindowsStyleAccelerators(const std::string& label) {
57  std::string ret;
58  base::ReplaceChars(label, "&", "&&", &ret);
59  return ret;
60}
61
62}  // namespace ui
63