Revert of Moves code from chromeos/ime to ui/base/ime/chromeos.

chromeos/ime/extension_ime_util.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromeos/ime/extension_ime_util.h"
+
+#include "base/strings/string_util.h"
+
+namespace chromeos {
+
+namespace {
+
+const char kExtensionIMEPrefix[] = "_ext_ime_";
+const int kExtensionIMEPrefixLength =
+    sizeof(kExtensionIMEPrefix) / sizeof(kExtensionIMEPrefix[0]) - 1;
+const char kComponentExtensionIMEPrefix[] = "_comp_ime_";
+const int kComponentExtensionIMEPrefixLength =
+    sizeof(kComponentExtensionIMEPrefix) /
+        sizeof(kComponentExtensionIMEPrefix[0]) - 1;
+const int kExtensionIdLength = 32;
+
+}  // namespace
+
+namespace extension_ime_util {
+
+std::string GetInputMethodID(const std::string& extension_id,
+                             const std::string& engine_id) {
+  DCHECK(!extension_id.empty());
+  DCHECK(!engine_id.empty());
+  return kExtensionIMEPrefix + extension_id + engine_id;
+}
+
+std::string GetComponentInputMethodID(const std::string& extension_id,
+                                      const std::string& engine_id) {
+  DCHECK(!extension_id.empty());
+  DCHECK(!engine_id.empty());
+  return kComponentExtensionIMEPrefix + extension_id + engine_id;
+}
+
+std::string GetExtensionIDFromInputMethodID(
+    const std::string& input_method_id) {
+  if (IsExtensionIME(input_method_id)) {
+    return input_method_id.substr(kExtensionIMEPrefixLength,
+                                  kExtensionIdLength);
+  }
+  if (IsComponentExtensionIME(input_method_id)) {
+    return input_method_id.substr(kComponentExtensionIMEPrefixLength,
+                                  kExtensionIdLength);
+  }
+  return "";
+}
+
+std::string GetComponentIDByInputMethodID(const std::string& input_method_id) {
+  if (IsComponentExtensionIME(input_method_id))
+    return input_method_id.substr(kComponentExtensionIMEPrefixLength +
+                                  kExtensionIdLength);
+  if (IsExtensionIME(input_method_id))
+    return input_method_id.substr(kExtensionIMEPrefixLength +
+                                  kExtensionIdLength);
+  return input_method_id;
+}
+
+std::string GetInputMethodIDByEngineID(const std::string& engine_id) {
+  if (StartsWithASCII(engine_id, kComponentExtensionIMEPrefix, true) ||
+      StartsWithASCII(engine_id, kExtensionIMEPrefix, true)) {
+    return engine_id;
+  }
+  if (StartsWithASCII(engine_id, "xkb:", true))
+    return GetComponentInputMethodID(kXkbExtensionId, engine_id);
+  if (StartsWithASCII(engine_id, "vkd_", true))
+    return GetComponentInputMethodID(kM17nExtensionId, engine_id);
+  if (StartsWithASCII(engine_id, "nacl_mozc_", true))
+    return GetComponentInputMethodID(kMozcExtensionId, engine_id);
+  if (StartsWithASCII(engine_id, "hangul_", true))
+    return GetComponentInputMethodID(kHangulExtensionId, engine_id);
+
+  if (StartsWithASCII(engine_id, "zh-", true) &&
+      engine_id.find("pinyin") != std::string::npos) {
+    return GetComponentInputMethodID(kChinesePinyinExtensionId, engine_id);
+  }
+  if (StartsWithASCII(engine_id, "zh-", true) &&
+      engine_id.find("zhuyin") != std::string::npos) {
+    return GetComponentInputMethodID(kChineseZhuyinExtensionId, engine_id);
+  }
+  if (StartsWithASCII(engine_id, "zh-", true) &&
+      engine_id.find("cangjie") != std::string::npos) {
+    return GetComponentInputMethodID(kChineseCangjieExtensionId, engine_id);
+  }
+  if (engine_id.find("-t-i0-") != std::string::npos)
+    return GetComponentInputMethodID(kT13nExtensionId, engine_id);
+
+  return engine_id;
+}
+
+bool IsExtensionIME(const std::string& input_method_id) {
+  return StartsWithASCII(input_method_id,
+                         kExtensionIMEPrefix,
+                         true /* Case sensitive */) &&
+      input_method_id.size() > kExtensionIMEPrefixLength +
+          kExtensionIdLength;
+}
+
+bool IsComponentExtensionIME(const std::string& input_method_id) {
+  return StartsWithASCII(input_method_id,
+                         kComponentExtensionIMEPrefix,
+                         true /* Case sensitive */) &&
+      input_method_id.size() > kComponentExtensionIMEPrefixLength +
+          kExtensionIdLength;
+}
+
+bool IsMemberOfExtension(const std::string& input_method_id,
+                         const std::string& extension_id) {
+  return StartsWithASCII(input_method_id,
+                         kExtensionIMEPrefix + extension_id,
+                         true /* Case sensitive */);
+}
+
+bool IsKeyboardLayoutExtension(const std::string& input_method_id) {
+  if (IsComponentExtensionIME(input_method_id))
+    return StartsWithASCII(GetComponentIDByInputMethodID(input_method_id),
+                           "xkb:", true);
+  return false;
+}
+
+std::string MaybeGetLegacyXkbId(const std::string& input_method_id) {
+  if (IsKeyboardLayoutExtension(input_method_id))
+    return GetComponentIDByInputMethodID(input_method_id);
+  return input_method_id;
+}
+
+}  // namespace extension_ime_util
+}  // namespace chromeos