From a92fead202aebdc5e98ce0b24aa9029b46a1e8d2 Mon Sep 17 00:00:00 2001 From: Yohei Yukawa Date: Fri, 4 Jul 2014 20:31:34 +0900 Subject: [PATCH] Add compatibility utility class for LocaleSpan This is a groundwork for enabling LocaleSpan support. LocaleSpan is available in API Level 17 and later. We need some abstraction layer as usual. BUG: 16029304 Change-Id: Iead1afdc540216edb1b17f91a40d9edb2e790168 --- .../compat/LocaleSpanCompatUtils.java | 59 +++++++++++++++++++ .../compat/LocaleSpanCompatUtilsTests.java | 38 ++++++++++++ 2 files changed, 97 insertions(+) create mode 100644 java/src/com/android/inputmethod/compat/LocaleSpanCompatUtils.java create mode 100644 tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java diff --git a/java/src/com/android/inputmethod/compat/LocaleSpanCompatUtils.java b/java/src/com/android/inputmethod/compat/LocaleSpanCompatUtils.java new file mode 100644 index 000000000..967645878 --- /dev/null +++ b/java/src/com/android/inputmethod/compat/LocaleSpanCompatUtils.java @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.inputmethod.compat; + +import com.android.inputmethod.annotations.UsedForTesting; +import com.android.inputmethod.compat.CompatUtils; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Method; +import java.util.Locale; + +@UsedForTesting +public final class LocaleSpanCompatUtils { + // Note that LocaleSpan(Locale locale) has been introduced in API level 17 + // (Build.VERSION_CODE.JELLY_BEAN_MR1). + private static Class getLocalSpanClass() { + try { + return Class.forName("android.text.style.LocaleSpan"); + } catch (ClassNotFoundException e) { + return null; + } + } + private static final Constructor LOCALE_SPAN_CONSTRUCTOR; + private static final Method LOCALE_SPAN_GET_LOCALE; + static { + final Class localeSpanClass = getLocalSpanClass(); + LOCALE_SPAN_CONSTRUCTOR = CompatUtils.getConstructor(localeSpanClass, Locale.class); + LOCALE_SPAN_GET_LOCALE = CompatUtils.getMethod(localeSpanClass, "getLocale"); + } + + @UsedForTesting + public static boolean isLocaleSpanAvailable() { + return (LOCALE_SPAN_CONSTRUCTOR != null && LOCALE_SPAN_GET_LOCALE != null); + } + + @UsedForTesting + public static Object newLocaleSpan(final Locale locale) { + return CompatUtils.newInstance(LOCALE_SPAN_CONSTRUCTOR, locale); + } + + @UsedForTesting + public static Locale getLocaleFromLocaleSpan(final Object localeSpan) { + return (Locale) CompatUtils.invoke(localeSpan, null, LOCALE_SPAN_GET_LOCALE); + } +} diff --git a/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java b/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java new file mode 100644 index 000000000..a920373d4 --- /dev/null +++ b/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.inputmethod.compat; + +import android.os.Build; +import android.test.AndroidTestCase; +import android.test.suitebuilder.annotation.SmallTest; + +import java.util.Locale; + +@SmallTest +public class LocaleSpanCompatUtilsTests extends AndroidTestCase { + public void testInstantiatable() { + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) { + // LocaleSpan isn't yet available. + return; + } + assertTrue(LocaleSpanCompatUtils.isLocaleSpanAvailable()); + final Object japaneseLocaleSpan = LocaleSpanCompatUtils.newLocaleSpan(Locale.JAPANESE); + assertNotNull(japaneseLocaleSpan); + assertEquals(Locale.JAPANESE, + LocaleSpanCompatUtils.getLocaleFromLocaleSpan(japaneseLocaleSpan)); + } +}