Make NeedsToDisplayLanguage as a top level class

Change-Id: Ia05e0494a9dccebfb5c1316479e52f04cf2ae444

java/src/com/android/inputmethod/keyboard/internal/NeedsToDisplayLanguage.java

@@ -0,0 +1,44 @@
+/*
+ * 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.keyboard.internal;
+
+import android.view.inputmethod.InputMethodSubtype;
+
+import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
+
+/**
+ * This class determines that the language name on the spacebar should be displayed or not.
+ */
+public final class NeedsToDisplayLanguage {
+    private int mEnabledSubtypeCount;
+    private boolean mIsSystemLanguageSameAsInputLanguage;
+
+    public boolean needsToDisplayLanguage(final InputMethodSubtype subtype) {
+        if (SubtypeLocaleUtils.isNoLanguage(subtype)) {
+            return true;
+        }
+        return mEnabledSubtypeCount >= 2 || !mIsSystemLanguageSameAsInputLanguage;
+    }
+
+    public void updateEnabledSubtypeCount(final int count) {
+        mEnabledSubtypeCount = count;
+    }
+
+    public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
+        mIsSystemLanguageSameAsInputLanguage = isSame;
+    }
+}

java/src/com/android/inputmethod/latin/SubtypeSwitcher.java

@@ -34,6 +34,7 @@ import android.view.inputmethod.InputMethodSubtype;
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.compat.InputMethodSubtypeCompatUtils;
 import com.android.inputmethod.keyboard.KeyboardSwitcher;
+import com.android.inputmethod.keyboard.internal.NeedsToDisplayLanguage;
 import com.android.inputmethod.latin.utils.LocaleUtils;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
@@ -89,26 +90,6 @@ public final class SubtypeSwitcher {
                     false /* isAuxiliary */, false /* overridesImplicitlyEnabledSubtype */,
                     SUBTYPE_ID_OF_DUMMY_EMOJI_SUBTYPE);
 
-    static final class NeedsToDisplayLanguage {
-        private int mEnabledSubtypeCount;
-        private boolean mIsSystemLanguageSameAsInputLanguage;
-
-        public boolean needsToDisplayLanguage(final InputMethodSubtype subtype) {
-            if (SubtypeLocaleUtils.isNoLanguage(subtype)) {
-                return true;
-            }
-            return mEnabledSubtypeCount >= 2 || !mIsSystemLanguageSameAsInputLanguage;
-        }
-
-        public void updateEnabledSubtypeCount(final int count) {
-            mEnabledSubtypeCount = count;
-        }
-
-        public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
-            mIsSystemLanguageSameAsInputLanguage = isSame;
-        }
-    }
-
     public static SubtypeSwitcher getInstance() {
         return sInstance;
     }

tests/src/com/android/inputmethod/keyboard/internal/NeedsToDisplayLanguageTests.java

@@ -0,0 +1,80 @@
+/*
+ * 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.keyboard.internal;
+
+import android.content.Context;
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+import android.view.inputmethod.InputMethodSubtype;
+
+import com.android.inputmethod.latin.RichInputMethodManager;
+import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
+
+import java.util.Locale;
+
+@SmallTest
+public class NeedsToDisplayLanguageTests extends AndroidTestCase {
+    private final NeedsToDisplayLanguage mNeedsToDisplayLanguage = new NeedsToDisplayLanguage();
+
+    private RichInputMethodManager mRichImm;
+
+    InputMethodSubtype EN_US;
+    InputMethodSubtype FR;
+    InputMethodSubtype ZZ;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        final Context context = getContext();
+        RichInputMethodManager.init(context);
+        mRichImm = RichInputMethodManager.getInstance();
+        SubtypeLocaleUtils.init(context);
+
+        EN_US = mRichImm.findSubtypeByLocaleAndKeyboardLayoutSet(
+                Locale.US.toString(), "qwerty");
+        FR = mRichImm.findSubtypeByLocaleAndKeyboardLayoutSet(
+                Locale.FRENCH.toString(), "azerty");
+        ZZ = mRichImm.findSubtypeByLocaleAndKeyboardLayoutSet(
+                SubtypeLocaleUtils.NO_LANGUAGE, "qwerty");
+    }
+
+    public void testOneSubtype() {
+        mNeedsToDisplayLanguage.updateEnabledSubtypeCount(1);
+
+        mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(true /* isSame */);
+        assertFalse("one same English (US)", mNeedsToDisplayLanguage.needsToDisplayLanguage(EN_US));
+        assertTrue("one same NoLanguage", mNeedsToDisplayLanguage.needsToDisplayLanguage(ZZ));
+
+        mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(false /* isSame */);
+        assertTrue("one diff English (US)", mNeedsToDisplayLanguage.needsToDisplayLanguage(EN_US));
+        assertTrue("one diff NoLanguage", mNeedsToDisplayLanguage.needsToDisplayLanguage(ZZ));
+    }
+
+    public void testTwoSubtype() {
+        mNeedsToDisplayLanguage.updateEnabledSubtypeCount(2);
+
+        mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(true /* isSame */);
+        assertTrue("two same English (US)", mNeedsToDisplayLanguage.needsToDisplayLanguage(EN_US));
+        assertTrue("two same French", mNeedsToDisplayLanguage.needsToDisplayLanguage(FR));
+        assertTrue("two same NoLanguage", mNeedsToDisplayLanguage.needsToDisplayLanguage(ZZ));
+
+        mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(false /* isSame */);
+        assertTrue("two diff English (US)", mNeedsToDisplayLanguage.needsToDisplayLanguage(EN_US));
+        assertTrue("two diff French", mNeedsToDisplayLanguage.needsToDisplayLanguage(ZZ));
+        assertTrue("two diff NoLanguage", mNeedsToDisplayLanguage.needsToDisplayLanguage(FR));
+    }
+}