Introduce IsMemberOfExtension function into ExtensionIMEUtil.

This function returns if the |input_method_id| is a member of |extension_id|.

BUG=164377
TEST=ran chromeos_unittests


Review URL: https://chromiumcodereview.appspot.com/12583012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@190769 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 33 insertions, 0 deletions

diff --git a/chromeos/ime/extension_ime_util.cc b/chromeos/ime/extension_ime_util.cc
index 7e6d3ac..3c95751 100644
--- a/chromeos/ime/extension_ime_util.cc
+++ b/chromeos/ime/extension_ime_util.cc
@@ -25,5 +25,12 @@ bool IsExtensionIME(const std::string& input_method_id) {
                          true);  // Case sensitive.
 }
 
+bool IsMemberOfExtension(const std::string& input_method_id,
+                         const std::string& extension_id) {
+  return StartsWithASCII(input_method_id,
+                         kExtensionIMEPrefix + extension_id,
+                         true);  // Case sensitive.
+}
+
 }  // namespace extension_ime_util
 }  // namespace chromeos
diff --git a/chromeos/ime/extension_ime_util.h b/chromeos/ime/extension_ime_util.h
index fd8505c..f439ec4 100644
--- a/chromeos/ime/extension_ime_util.h
+++ b/chromeos/ime/extension_ime_util.h
@@ -21,6 +21,11 @@ std::string CHROMEOS_EXPORT GetInputMethodID(const std::string& extension_id,
 // Returns true if the |input_method_id| is extension ime.
 bool CHROMEOS_EXPORT IsExtensionIME(const std::string& input_method_id);
 
+// Returns true if the |input_method| is member of |extension_id|, otherwise
+// return false.
+bool CHROMEOS_EXPORT IsMemberOfExtension(const std::string& input_method_id,
+                                         const std::string& extension_id);
+
 }  // extension_ime_util
 
 }  // namespace chromeos
diff --git a/chromeos/ime/extension_ime_util_unittest.cc b/chromeos/ime/extension_ime_util_unittest.cc
index a25c1a1..468a725 100644
--- a/chromeos/ime/extension_ime_util_unittest.cc
+++ b/chromeos/ime/extension_ime_util_unittest.cc
@@ -22,4 +22,25 @@ TEST(ExtensionIMEUtilTest, IsExtensionIMETest) {
   EXPECT_FALSE(extension_ime_util::IsExtensionIME("mozc"));
 }
 
+TEST(ExtensionIMEUtilTest, IsMemberOfExtension) {
+  const char* extention1 = "abcdefg";
+  const char* extention2 = "hijklmn";
+  const char* engine_id1 = "12345";
+  const char* engine_id2 = "67890";
+
+  const std::string extention_1_engine_1 =
+      extension_ime_util::GetInputMethodID(extention1, engine_id1);
+  const std::string extention_1_engine_2 =
+      extension_ime_util::GetInputMethodID(extention1, engine_id2);
+
+  EXPECT_TRUE(extension_ime_util::IsMemberOfExtension(extention_1_engine_1,
+                                                      extention1));
+  EXPECT_TRUE(extension_ime_util::IsMemberOfExtension(extention_1_engine_2,
+                                                      extention1));
+  EXPECT_FALSE(extension_ime_util::IsMemberOfExtension(extention_1_engine_1,
+                                                       extention2));
+  EXPECT_FALSE(extension_ime_util::IsMemberOfExtension(extention_1_engine_2,
+                                                       extention2));
+}
+
 }  // namespace chromeos