Use reflections for classes related to InputMethodSubtype

Change-Id: Ica53ce879c2b4c5eb47f757fb788a795a881c30e

4 files changed, 299 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/compat/AbstractCompatWrapper.java b/java/src/com/android/inputmethod/compat/AbstractCompatWrapper.java
new file mode 100644
index 000000000..99262c434
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/AbstractCompatWrapper.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2011 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.util.Log;
+
+public abstract class AbstractCompatWrapper {
+    private static final String TAG = AbstractCompatWrapper.class.getSimpleName();
+    protected final Object mObj;
+
+    public AbstractCompatWrapper(Object obj) {
+        if (obj == null) {
+            Log.e(TAG, "Invalid input to AbstructCompatWrapper");
+        }
+        mObj = obj;
+    }
+
+    public Object getOriginalObject() {
+        return mObj;
+    }
+}
diff --git a/java/src/com/android/inputmethod/compat/CompatUtils.java b/java/src/com/android/inputmethod/compat/CompatUtils.java
index e1e812d83..157446654 100644
--- a/java/src/com/android/inputmethod/compat/CompatUtils.java
+++ b/java/src/com/android/inputmethod/compat/CompatUtils.java
@@ -18,8 +18,15 @@ package com.android.inputmethod.compat;
 
 import android.content.Intent;
 import android.text.TextUtils;
+import android.util.Log;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
 
 public class CompatUtils {
+    private static final String TAG = CompatUtils.class.getSimpleName();
     private static final String EXTRA_INPUT_METHOD_ID = "input_method_id";
     // TODO: Can these be constants instead of literal String constants?
     private static final String INPUT_METHOD_SUBTYPE_SETTINGS =
@@ -48,4 +55,53 @@ public class CompatUtils {
         }
         return intent;
     }
+
+    public static Class<?> getClass(String className) {
+        try {
+            return Class.forName(className);
+        } catch (ClassNotFoundException e) {
+            return null;
+        }
+    }
+
+    public static Method getMethod(Class<?> targetClass, String name,
+            Class<?>... parameterTypes) {
+        try {
+            return targetClass.getMethod(name, parameterTypes);
+        } catch (SecurityException e) {
+            // ignore
+            return null;
+        } catch (NoSuchMethodException e) {
+            // ignore
+            return null;
+        }
+    }
+
+    public static Object invoke(
+            Object receiver, Object defaultValue, Method method, Object... args) {
+        if (receiver == null || method == null) return defaultValue;
+        try {
+            return method.invoke(receiver, args);
+        } catch (IllegalArgumentException e) {
+            Log.e(TAG, "Exception in invoke: IllegalArgmentException");
+            return defaultValue;
+        } catch (IllegalAccessException e) {
+            Log.e(TAG, "Exception in invoke: IllegalAccessException");
+            return defaultValue;
+        } catch (InvocationTargetException e) {
+            Log.e(TAG, "Exception in invoke: IllegalTargetException");
+            return defaultValue;
+        }
+    }
+
+    public static List<InputMethodSubtypeCompatWrapper> copyInputMethodSubtypeListToWrappler(
+            Object listObject) {
+        if (!(listObject instanceof List<?>)) return null;
+        final List<InputMethodSubtypeCompatWrapper> subtypes =
+                new ArrayList<InputMethodSubtypeCompatWrapper>();
+        for (Object o: (List<?>)listObject) {
+            subtypes.add(new InputMethodSubtypeCompatWrapper(o));
+        }
+        return subtypes;
+    }
 }
diff --git a/java/src/com/android/inputmethod/compat/InputMethodManagerCompatWrapper.java b/java/src/com/android/inputmethod/compat/InputMethodManagerCompatWrapper.java
new file mode 100644
index 000000000..648b1892b
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/InputMethodManagerCompatWrapper.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2011 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.content.Context;
+import android.os.IBinder;
+import android.util.Log;
+import android.view.inputmethod.InputMethodInfo;
+import android.view.inputmethod.InputMethodManager;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+// TODO: Override this class with the concrete implementation if we need to take care of the
+// performance.
+public class InputMethodManagerCompatWrapper {
+    private static final String TAG = InputMethodManagerCompatWrapper.class.getSimpleName();
+    private static final Method METHOD_getCurrentInputMethodSubtype =
+            CompatUtils.getMethod(InputMethodManager.class, "getCurrentInputMethodSubtype");
+    private static final Method METHOD_getEnabledInputMethodSubtypeList =
+            CompatUtils.getMethod(InputMethodManager.class, "getEnabledInputMethodSubtypeList",
+                    InputMethodInfo.class, boolean.class);
+    private static final Method METHOD_getShortcutInputMethodsAndSubtypes =
+            CompatUtils.getMethod(InputMethodManager.class, "getShortcutInputMethodsAndSubtypes");
+    private static final Method METHOD_setInputMethodAndSubtype =
+            CompatUtils.getMethod(
+                    InputMethodManager.class, "setInputMethodAndSubtype", IBinder.class,
+                    String.class, InputMethodSubtypeCompatWrapper.CLASS_InputMethodSubtype);
+
+    private static final InputMethodManagerCompatWrapper sInstance =
+            new InputMethodManagerCompatWrapper();
+
+    private InputMethodManager mImm;
+    private InputMethodManagerCompatWrapper() {
+    }
+
+    public static InputMethodManagerCompatWrapper getInstance(Context context) {
+        if (sInstance.mImm == null) {
+            sInstance.init(context);
+        }
+        return sInstance;
+    }
+
+    private synchronized void init(Context context) {
+        mImm = (InputMethodManager) context.getSystemService(
+                Context.INPUT_METHOD_SERVICE);
+    }
+
+    public InputMethodSubtypeCompatWrapper getCurrentInputMethodSubtype() {
+        return new InputMethodSubtypeCompatWrapper(
+                CompatUtils.invoke(mImm, null, METHOD_getCurrentInputMethodSubtype));
+    }
+
+    public List<InputMethodSubtypeCompatWrapper> getEnabledInputMethodSubtypeList(
+            InputMethodInfo imi, boolean allowsImplicitlySelectedSubtypes) {
+        Object retval = CompatUtils.invoke(mImm, null, METHOD_getEnabledInputMethodSubtypeList,
+                imi, allowsImplicitlySelectedSubtypes);
+        return CompatUtils.copyInputMethodSubtypeListToWrappler((List<?>)retval);
+    }
+
+    public Map<InputMethodInfo, List<InputMethodSubtypeCompatWrapper>>
+            getShortcutInputMethodsAndSubtypes() {
+        Object retval = CompatUtils.invoke(mImm, null, METHOD_getShortcutInputMethodsAndSubtypes);
+        if (!(retval instanceof Map)) return null;
+        Map<InputMethodInfo, List<InputMethodSubtypeCompatWrapper>> shortcutMap =
+                new HashMap<InputMethodInfo, List<InputMethodSubtypeCompatWrapper>>();
+        final Map<?, ?> retvalMap = (Map<?, ?>)retval;
+        for (Object key: retvalMap.keySet()) {
+            if (!(key instanceof InputMethodInfo)) {
+                Log.e(TAG, "Class type error.");
+                return null;
+            }
+            shortcutMap.put((InputMethodInfo)key, CompatUtils.copyInputMethodSubtypeListToWrappler(
+                    retvalMap.get(key)));
+        }
+        return shortcutMap;
+    }
+
+    public void setInputMethodAndSubtype(
+            IBinder token, String id, InputMethodSubtypeCompatWrapper subtype) {
+        CompatUtils.invoke(mImm, null, METHOD_setInputMethodAndSubtype,
+                token, id, subtype.getOriginalObject());
+    }
+
+    public boolean switchToLastInputMethod(IBinder token) {
+        if (mImm == null) return false;
+        return mImm.switchToLastInputMethod(token);
+    }
+
+    public List<InputMethodInfo> getEnabledInputMethodList() {
+        if (mImm == null) return null;
+        return mImm.getEnabledInputMethodList();
+    }
+
+    public void showInputMethodPicker() {
+        if (mImm == null) return;
+        mImm.showInputMethodPicker();
+    }
+}
diff --git a/java/src/com/android/inputmethod/compat/InputMethodSubtypeCompatWrapper.java b/java/src/com/android/inputmethod/compat/InputMethodSubtypeCompatWrapper.java
new file mode 100644
index 000000000..ce031eea5
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/InputMethodSubtypeCompatWrapper.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2011 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.latin.LatinImeLogger;
+
+import android.util.Log;
+
+import java.lang.reflect.Method;
+
+// TODO: Override this class with the concrete implementation if we need to take care of the
+// performance.
+public final class InputMethodSubtypeCompatWrapper extends AbstractCompatWrapper {
+    private static final boolean DBG = LatinImeLogger.sDBG;
+    private static final String TAG = InputMethodSubtypeCompatWrapper.class.getSimpleName();
+
+    public static final Class<?> CLASS_InputMethodSubtype =
+            CompatUtils.getClass("android.view.inputmethod.InputMethodSubtype");
+    private static final Method METHOD_getNameResId =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getNameResId");
+    private static final Method METHOD_getIconResId =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getIconResId");
+    private static final Method METHOD_getLocale =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getLocale");
+    private static final Method METHOD_getMode =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getMode");
+    private static final Method METHOD_getExtraValue =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getExtraValue");
+    private static final Method METHOD_containsExtraValueKey =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "containsExtraValueKey", String.class);
+    private static final Method METHOD_getExtraValueOf =
+            CompatUtils.getMethod(CLASS_InputMethodSubtype, "getExtraValueOf", String.class);
+
+    public InputMethodSubtypeCompatWrapper(Object subtype) {
+        super(CLASS_InputMethodSubtype.isInstance(subtype) ? subtype : null);
+        if (DBG) {
+            Log.d(TAG, "CreateInputMethodSubtypeCompatWrapper");
+        }
+    }
+
+    public int getNameResId() {
+        return (Integer)CompatUtils.invoke(mObj, 0, METHOD_getNameResId);
+    }
+
+    public int getIconResId() {
+        return (Integer)CompatUtils.invoke(mObj, 0, METHOD_getIconResId);
+    }
+
+    public String getLocale() {
+        return (String)CompatUtils.invoke(mObj, null, METHOD_getLocale);
+    }
+
+    public String getMode() {
+        return (String)CompatUtils.invoke(mObj, null, METHOD_getMode);
+    }
+
+    public String getExtraValue() {
+        return (String)CompatUtils.invoke(mObj, null, METHOD_getExtraValue);
+    }
+
+    public boolean containsExtraValueKey(String key) {
+        return (Boolean)CompatUtils.invoke(mObj, null, METHOD_containsExtraValueKey, key);
+    }
+
+    public String getExtraValueOf(String key) {
+        return (String)CompatUtils.invoke(mObj, null, METHOD_getExtraValueOf, key);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o instanceof InputMethodSubtypeCompatWrapper) {
+            InputMethodSubtypeCompatWrapper subtype = (InputMethodSubtypeCompatWrapper)o;
+            return mObj.equals(subtype.getOriginalObject());
+        } else {
+            return mObj.equals(o);
+        }
+    }
+
+}