1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.inputmethodservice;
18
19import com.android.internal.os.HandlerCaller;
20import com.android.internal.view.IInputMethodCallback;
21import com.android.internal.view.IInputMethodSession;
22
23import android.content.Context;
24import android.graphics.Rect;
25import android.os.Bundle;
26import android.os.Message;
27import android.os.RemoteException;
28import android.util.Log;
29import android.view.KeyEvent;
30import android.view.MotionEvent;
31import android.view.inputmethod.CompletionInfo;
32import android.view.inputmethod.ExtractedText;
33import android.view.inputmethod.InputMethodSession;
34
35class IInputMethodSessionWrapper extends IInputMethodSession.Stub
36        implements HandlerCaller.Callback {
37    private static final String TAG = "InputMethodWrapper";
38    private static final boolean DEBUG = false;
39
40    private static final int DO_FINISH_INPUT = 60;
41    private static final int DO_DISPLAY_COMPLETIONS = 65;
42    private static final int DO_UPDATE_EXTRACTED_TEXT = 67;
43    private static final int DO_DISPATCH_KEY_EVENT = 70;
44    private static final int DO_DISPATCH_TRACKBALL_EVENT = 80;
45    private static final int DO_UPDATE_SELECTION = 90;
46    private static final int DO_UPDATE_CURSOR = 95;
47    private static final int DO_APP_PRIVATE_COMMAND = 100;
48    private static final int DO_TOGGLE_SOFT_INPUT = 105;
49    private static final int DO_FINISH_SESSION = 110;
50    private static final int DO_VIEW_CLICKED = 115;
51
52    HandlerCaller mCaller;
53    InputMethodSession mInputMethodSession;
54
55    // NOTE: we should have a cache of these.
56    static class InputMethodEventCallbackWrapper implements InputMethodSession.EventCallback {
57        final IInputMethodCallback mCb;
58        InputMethodEventCallbackWrapper(IInputMethodCallback cb) {
59            mCb = cb;
60        }
61        public void finishedEvent(int seq, boolean handled) {
62            try {
63                mCb.finishedEvent(seq, handled);
64            } catch (RemoteException e) {
65            }
66        }
67    }
68
69    public IInputMethodSessionWrapper(Context context,
70            InputMethodSession inputMethodSession) {
71        mCaller = new HandlerCaller(context, this);
72        mInputMethodSession = inputMethodSession;
73    }
74
75    public InputMethodSession getInternalInputMethodSession() {
76        return mInputMethodSession;
77    }
78
79    public void executeMessage(Message msg) {
80        if (mInputMethodSession == null) return;
81
82        switch (msg.what) {
83            case DO_FINISH_INPUT:
84                mInputMethodSession.finishInput();
85                return;
86            case DO_DISPLAY_COMPLETIONS:
87                mInputMethodSession.displayCompletions((CompletionInfo[])msg.obj);
88                return;
89            case DO_UPDATE_EXTRACTED_TEXT:
90                mInputMethodSession.updateExtractedText(msg.arg1,
91                        (ExtractedText)msg.obj);
92                return;
93            case DO_DISPATCH_KEY_EVENT: {
94                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
95                mInputMethodSession.dispatchKeyEvent(msg.arg1,
96                        (KeyEvent)args.arg1,
97                        new InputMethodEventCallbackWrapper(
98                                (IInputMethodCallback)args.arg2));
99                mCaller.recycleArgs(args);
100                return;
101            }
102            case DO_DISPATCH_TRACKBALL_EVENT: {
103                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
104                mInputMethodSession.dispatchTrackballEvent(msg.arg1,
105                        (MotionEvent)args.arg1,
106                        new InputMethodEventCallbackWrapper(
107                                (IInputMethodCallback)args.arg2));
108                mCaller.recycleArgs(args);
109                return;
110            }
111            case DO_UPDATE_SELECTION: {
112                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
113                mInputMethodSession.updateSelection(args.argi1, args.argi2,
114                        args.argi3, args.argi4, args.argi5, args.argi6);
115                mCaller.recycleArgs(args);
116                return;
117            }
118            case DO_UPDATE_CURSOR: {
119                mInputMethodSession.updateCursor((Rect)msg.obj);
120                return;
121            }
122            case DO_APP_PRIVATE_COMMAND: {
123                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
124                mInputMethodSession.appPrivateCommand((String)args.arg1,
125                        (Bundle)args.arg2);
126                mCaller.recycleArgs(args);
127                return;
128            }
129            case DO_TOGGLE_SOFT_INPUT: {
130                mInputMethodSession.toggleSoftInput(msg.arg1, msg.arg2);
131                return;
132            }
133            case DO_FINISH_SESSION: {
134                mInputMethodSession = null;
135                return;
136            }
137            case DO_VIEW_CLICKED: {
138                mInputMethodSession.viewClicked(msg.arg1 == 1);
139                return;
140            }
141        }
142        Log.w(TAG, "Unhandled message code: " + msg.what);
143    }
144
145    public void finishInput() {
146        mCaller.executeOrSendMessage(mCaller.obtainMessage(DO_FINISH_INPUT));
147    }
148
149    public void displayCompletions(CompletionInfo[] completions) {
150        mCaller.executeOrSendMessage(mCaller.obtainMessageO(
151                DO_DISPLAY_COMPLETIONS, completions));
152    }
153
154    public void updateExtractedText(int token, ExtractedText text) {
155        mCaller.executeOrSendMessage(mCaller.obtainMessageIO(
156                DO_UPDATE_EXTRACTED_TEXT, token, text));
157    }
158
159    public void dispatchKeyEvent(int seq, KeyEvent event, IInputMethodCallback callback) {
160        mCaller.executeOrSendMessage(mCaller.obtainMessageIOO(DO_DISPATCH_KEY_EVENT, seq,
161                event, callback));
162    }
163
164    public void dispatchTrackballEvent(int seq, MotionEvent event, IInputMethodCallback callback) {
165        mCaller.executeOrSendMessage(mCaller.obtainMessageIOO(DO_DISPATCH_TRACKBALL_EVENT, seq,
166                event, callback));
167    }
168
169    public void updateSelection(int oldSelStart, int oldSelEnd,
170            int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd) {
171        mCaller.executeOrSendMessage(mCaller.obtainMessageIIIIII(DO_UPDATE_SELECTION,
172                oldSelStart, oldSelEnd, newSelStart, newSelEnd,
173                candidatesStart, candidatesEnd));
174    }
175
176    public void viewClicked(boolean focusChanged) {
177        mCaller.executeOrSendMessage(mCaller.obtainMessageI(DO_VIEW_CLICKED, focusChanged ? 1 : 0));
178    }
179
180    public void updateCursor(Rect newCursor) {
181        mCaller.executeOrSendMessage(mCaller.obtainMessageO(DO_UPDATE_CURSOR,
182                newCursor));
183    }
184
185    public void appPrivateCommand(String action, Bundle data) {
186        mCaller.executeOrSendMessage(mCaller.obtainMessageOO(DO_APP_PRIVATE_COMMAND, action, data));
187    }
188
189    public void toggleSoftInput(int showFlags, int hideFlags) {
190        mCaller.executeOrSendMessage(mCaller.obtainMessageII(DO_TOGGLE_SOFT_INPUT, showFlags, hideFlags));
191    }
192
193    public void finishSession() {
194        mCaller.executeOrSendMessage(mCaller.obtainMessage(DO_FINISH_SESSION));
195    }
196}
197