Use InputMethodUtils in input method settings

Change-Id: Ifd054c86b7099db3984e559feb5fadf1df5ca227

src/com/android/settings/inputmethod/InputMethodSettingValuesWrapper.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2013 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.settings.inputmethod;
+
+import com.android.internal.inputmethod.InputMethodUtils;
+import com.android.internal.inputmethod.InputMethodUtils.InputMethodSettings;
+
+import android.app.ActivityManagerNative;
+import android.content.Context;
+import android.os.RemoteException;
+import android.util.Log;
+import android.util.Slog;
+import android.view.inputmethod.InputMethodInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.view.inputmethod.InputMethodSubtype;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+/**
+ * This class is a wrapper for InputMethodSettings. You need to refresh internal states
+ * manually on some events when "InputMethodInfo"s and "InputMethodSubtype"s can be
+ * changed.
+ */
+public class InputMethodSettingValuesWrapper {
+    private static final String TAG = InputMethodSettingValuesWrapper.class.getSimpleName();
+    private static volatile InputMethodSettingValuesWrapper sInstance;
+    private final ArrayList<InputMethodInfo> mMethodList = new ArrayList<InputMethodInfo>();
+    private final HashMap<String, InputMethodInfo> mMethodMap =
+            new HashMap<String, InputMethodInfo>();
+    private final InputMethodSettings mSettings;
+    private final InputMethodManager mImm;
+
+    public static InputMethodSettingValuesWrapper getInstance(Context context) {
+        if (sInstance == null) {
+            synchronized(TAG) {
+                if (sInstance == null) {
+                    sInstance = new InputMethodSettingValuesWrapper(context);
+                }
+            }
+        }
+        return sInstance;
+    }
+
+    private static int getDefaultCurrentUserId() {
+        try {
+            return ActivityManagerNative.getDefault().getCurrentUser().id;
+        } catch (RemoteException e) {
+            Slog.w(TAG, "Couldn't get current user ID; guessing it's 0", e);
+        }
+        return 0;
+    }
+
+    // Ensure singleton
+    private InputMethodSettingValuesWrapper(Context context) {
+        mSettings =
+                new InputMethodSettings(context.getResources(), context.getContentResolver(),
+                        mMethodMap, mMethodList, getDefaultCurrentUserId());
+        mImm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
+        refreshAllInputMethodAndSubtypes();
+    }
+
+    public void refreshAllInputMethodAndSubtypes() {
+        synchronized (mMethodMap) {
+            mMethodList.clear();
+            mMethodMap.clear();
+            final List<InputMethodInfo> imms = mImm.getInputMethodList();
+            mMethodList.addAll(imms);
+            for (InputMethodInfo imi : imms) {
+                mMethodMap.put(imi.getId(), imi);
+            }
+        }
+    }
+
+    public List<InputMethodInfo> getInputMethodList() {
+        synchronized (mMethodMap) {
+            return mMethodList;
+        }
+    }
+
+    public CharSequence getCurrentInputMethodName(Context context) {
+        synchronized (mMethodMap) {
+            final InputMethodInfo imi = mMethodMap.get(mSettings.getSelectedInputMethod());
+            if (imi == null) {
+                Log.w(TAG, "Invalid selected imi: " + mSettings.getSelectedInputMethod());
+                return "";
+            }
+            final InputMethodSubtype subtype = mImm.getCurrentInputMethodSubtype();
+            return InputMethodUtils.getImeAndSubtypeDisplayName(context, imi, subtype);
+        }
+    }
+}