ui/base/ime/chromeos/extension_ime_util.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/ime/chromeos/extension_ime_util.h"
   6
   7 #include "base/strings/string_util.h"
   8
   9 namespace chromeos {
  10
  11 namespace {
  12
  13 const char kExtensionIMEPrefix[] = "_ext_ime_";
  14 const int kExtensionIMEPrefixLength =
  15     sizeof(kExtensionIMEPrefix) / sizeof(kExtensionIMEPrefix[0]) - 1;
  16 const char kComponentExtensionIMEPrefix[] = "_comp_ime_";
  17 const int kComponentExtensionIMEPrefixLength =
  18     sizeof(kComponentExtensionIMEPrefix) /
  19         sizeof(kComponentExtensionIMEPrefix[0]) - 1;
  20 const int kExtensionIdLength = 32;
  21
  22 }  // namespace
  23
  24 namespace extension_ime_util {
  25
  26 std::string GetInputMethodID(const std::string& extension_id,
  27                              const std::string& engine_id) {
  28   DCHECK(!extension_id.empty());
  29   DCHECK(!engine_id.empty());
  30   return kExtensionIMEPrefix + extension_id + engine_id;
  31 }
  32
  33 std::string GetComponentInputMethodID(const std::string& extension_id,
  34                                       const std::string& engine_id) {
  35   DCHECK(!extension_id.empty());
  36   DCHECK(!engine_id.empty());
  37   return kComponentExtensionIMEPrefix + extension_id + engine_id;
  38 }
  39
  40 std::string GetExtensionIDFromInputMethodID(
  41     const std::string& input_method_id) {
  42   if (IsExtensionIME(input_method_id)) {
  43     return input_method_id.substr(kExtensionIMEPrefixLength,
  44                                   kExtensionIdLength);
  45   }
  46   if (IsComponentExtensionIME(input_method_id)) {
  47     return input_method_id.substr(kComponentExtensionIMEPrefixLength,
  48                                   kExtensionIdLength);
  49   }
  50   return "";
  51 }
  52
  53 std::string GetComponentIDByInputMethodID(const std::string& input_method_id) {
  54   if (IsComponentExtensionIME(input_method_id))
  55     return input_method_id.substr(kComponentExtensionIMEPrefixLength +
  56                                   kExtensionIdLength);
  57   if (IsExtensionIME(input_method_id))
  58     return input_method_id.substr(kExtensionIMEPrefixLength +
  59                                   kExtensionIdLength);
  60   return input_method_id;
  61 }
  62
  63 std::string GetInputMethodIDByEngineID(const std::string& engine_id) {
  64   if (base::StartsWithASCII(engine_id, kComponentExtensionIMEPrefix, true) ||
  65       base::StartsWithASCII(engine_id, kExtensionIMEPrefix, true)) {
  66     return engine_id;
  67   }
  68   if (base::StartsWithASCII(engine_id, "xkb:", true))
  69     return GetComponentInputMethodID(kXkbExtensionId, engine_id);
  70   if (base::StartsWithASCII(engine_id, "vkd_", true))
  71     return GetComponentInputMethodID(kM17nExtensionId, engine_id);
  72   if (base::StartsWithASCII(engine_id, "nacl_mozc_", true))
  73     return GetComponentInputMethodID(kMozcExtensionId, engine_id);
  74   if (base::StartsWithASCII(engine_id, "hangul_", true))
  75     return GetComponentInputMethodID(kHangulExtensionId, engine_id);
  76
  77   if (base::StartsWithASCII(engine_id, "zh-", true) &&
  78       engine_id.find("pinyin") != std::string::npos) {
  79     return GetComponentInputMethodID(kChinesePinyinExtensionId, engine_id);
  80   }
  81   if (base::StartsWithASCII(engine_id, "zh-", true) &&
  82       engine_id.find("zhuyin") != std::string::npos) {
  83     return GetComponentInputMethodID(kChineseZhuyinExtensionId, engine_id);
  84   }
  85   if (base::StartsWithASCII(engine_id, "zh-", true) &&
  86       engine_id.find("cangjie") != std::string::npos) {
  87     return GetComponentInputMethodID(kChineseCangjieExtensionId, engine_id);
  88   }
  89   if (engine_id.find("-t-i0-") != std::string::npos)
  90     return GetComponentInputMethodID(kT13nExtensionId, engine_id);
  91
  92   return engine_id;
  93 }
  94
  95 bool IsExtensionIME(const std::string& input_method_id) {
  96   return base::StartsWithASCII(input_method_id, kExtensionIMEPrefix,
  97                                true /* Case sensitive */) &&
  98          input_method_id.size() >
  99              kExtensionIMEPrefixLength + kExtensionIdLength;
 100 }
 101
 102 bool IsComponentExtensionIME(const std::string& input_method_id) {
 103   return base::StartsWithASCII(input_method_id, kComponentExtensionIMEPrefix,
 104                                true /* Case sensitive */) &&
 105          input_method_id.size() >
 106              kComponentExtensionIMEPrefixLength + kExtensionIdLength;
 107 }
 108
 109 bool IsMemberOfExtension(const std::string& input_method_id,
 110                          const std::string& extension_id) {
 111   return base::StartsWithASCII(input_method_id,
 112                                kExtensionIMEPrefix + extension_id,
 113                                true /* Case sensitive */);
 114 }
 115
 116 bool IsKeyboardLayoutExtension(const std::string& input_method_id) {
 117   if (IsComponentExtensionIME(input_method_id))
 118     return base::StartsWithASCII(GetComponentIDByInputMethodID(input_method_id),
 119                                  "xkb:", true);
 120   return false;
 121 }
 122
 123 std::string MaybeGetLegacyXkbId(const std::string& input_method_id) {
 124   if (IsKeyboardLayoutExtension(input_method_id))
 125     return GetComponentIDByInputMethodID(input_method_id);
 126   return input_method_id;
 127 }
 128
 129 }  // namespace extension_ime_util
 130 }  // namespace chromeos