Android example source code file (IInputMethodSessionWrapper.java)

This example Android source code file (IInputMethodSessionWrapper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, do_app_private_command, do_dispatch_key_event, do_dispatch_trackball_event, do_display_completions, do_finish_input, do_finish_session, do_toggle_soft_input, do_update_cursor, do_update_extracted_text, handlercaller, iinputmethodcallback, iinputmethodsessionwrapper, input, inputmethod, inputmethodeventcallbackwrapper, inputmethodsession, os, ui, view

The IInputMethodSessionWrapper.java Android example source code

/*
 * Copyright (C) 2008 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 android.inputmethodservice;

import com.android.internal.os.HandlerCaller;
import com.android.internal.view.IInputMethodCallback;
import com.android.internal.view.IInputMethodSession;

import android.content.Context;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Message;
import android.os.RemoteException;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.inputmethod.CompletionInfo;
import android.view.inputmethod.ExtractedText;
import android.view.inputmethod.InputMethodSession;
import android.view.inputmethod.EditorInfo;

class IInputMethodSessionWrapper extends IInputMethodSession.Stub
        implements HandlerCaller.Callback {
    private static final String TAG = "InputMethodWrapper";
    private static final boolean DEBUG = false;
    
    private static final int DO_FINISH_INPUT = 60;
    private static final int DO_DISPLAY_COMPLETIONS = 65;
    private static final int DO_UPDATE_EXTRACTED_TEXT = 67;
    private static final int DO_DISPATCH_KEY_EVENT = 70;
    private static final int DO_DISPATCH_TRACKBALL_EVENT = 80;
    private static final int DO_UPDATE_SELECTION = 90;
    private static final int DO_UPDATE_CURSOR = 95;
    private static final int DO_APP_PRIVATE_COMMAND = 100;
    private static final int DO_TOGGLE_SOFT_INPUT = 105;
    private static final int DO_FINISH_SESSION = 110;

    HandlerCaller mCaller;
    InputMethodSession mInputMethodSession;
    
    // NOTE: we should have a cache of these.
    static class InputMethodEventCallbackWrapper implements InputMethodSession.EventCallback {
        final IInputMethodCallback mCb;
        InputMethodEventCallbackWrapper(IInputMethodCallback cb) {
            mCb = cb;
        }
        public void finishedEvent(int seq, boolean handled) {
            try {
                mCb.finishedEvent(seq, handled);
            } catch (RemoteException e) {
            }
        }
    }
    
    public IInputMethodSessionWrapper(Context context,
            InputMethodSession inputMethodSession) {
        mCaller = new HandlerCaller(context, this);
        mInputMethodSession = inputMethodSession;
    }

    public InputMethodSession getInternalInputMethodSession() {
        return mInputMethodSession;
    }

    public void executeMessage(Message msg) {
        switch (msg.what) {
            case DO_FINISH_INPUT:
                mInputMethodSession.finishInput();
                return;
            case DO_DISPLAY_COMPLETIONS:
                mInputMethodSession.displayCompletions((CompletionInfo[])msg.obj);
                return;
            case DO_UPDATE_EXTRACTED_TEXT:
                mInputMethodSession.updateExtractedText(msg.arg1,
                        (ExtractedText)msg.obj);
                return;
            case DO_DISPATCH_KEY_EVENT: {
                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
                mInputMethodSession.dispatchKeyEvent(msg.arg1,
                        (KeyEvent)args.arg1,
                        new InputMethodEventCallbackWrapper(
                                (IInputMethodCallback)args.arg2));
                mCaller.recycleArgs(args);
                return;
            }
            case DO_DISPATCH_TRACKBALL_EVENT: {
                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
                mInputMethodSession.dispatchTrackballEvent(msg.arg1,
                        (MotionEvent)args.arg1,
                        new InputMethodEventCallbackWrapper(
                                (IInputMethodCallback)args.arg2));
                mCaller.recycleArgs(args);
                return;
            }
            case DO_UPDATE_SELECTION: {
                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
                mInputMethodSession.updateSelection(args.argi1, args.argi2,
                        args.argi3, args.argi4, args.argi5, args.argi6);
                mCaller.recycleArgs(args);
                return;
            }
            case DO_UPDATE_CURSOR: {
                mInputMethodSession.updateCursor((Rect)msg.obj);
                return;
            }
            case DO_APP_PRIVATE_COMMAND: {
                HandlerCaller.SomeArgs args = (HandlerCaller.SomeArgs)msg.obj;
                mInputMethodSession.appPrivateCommand((String)args.arg1,
                        (Bundle)args.arg2);
                mCaller.recycleArgs(args);
                return;
            }
            case DO_TOGGLE_SOFT_INPUT: {
                mInputMethodSession.toggleSoftInput(msg.arg1, msg.arg2);
                return;
            }
            case DO_FINISH_SESSION: {
                mInputMethodSession = null;
                return;
            }
        }
        Log.w(TAG, "Unhandled message code: " + msg.what);
    }
    
    public void finishInput() {
        mCaller.executeOrSendMessage(mCaller.obtainMessage(DO_FINISH_INPUT));
    }

    public void displayCompletions(CompletionInfo[] completions) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageO(
                DO_DISPLAY_COMPLETIONS, completions));
    }
    
    public void updateExtractedText(int token, ExtractedText text) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageIO(
                DO_UPDATE_EXTRACTED_TEXT, token, text));
    }
    
    public void dispatchKeyEvent(int seq, KeyEvent event, IInputMethodCallback callback) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageIOO(DO_DISPATCH_KEY_EVENT, seq,
                event, callback));
    }

    public void dispatchTrackballEvent(int seq, MotionEvent event, IInputMethodCallback callback) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageIOO(DO_DISPATCH_TRACKBALL_EVENT, seq,
                event, callback));
    }

    public void updateSelection(int oldSelStart, int oldSelEnd,
            int newSelStart, int newSelEnd, int candidatesStart, int candidatesEnd) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageIIIIII(DO_UPDATE_SELECTION,
                oldSelStart, oldSelEnd, newSelStart, newSelEnd,
                candidatesStart, candidatesEnd));
    }
    
    public void updateCursor(Rect newCursor) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageO(DO_UPDATE_CURSOR,
                newCursor));
    }
    
    public void appPrivateCommand(String action, Bundle data) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageOO(DO_APP_PRIVATE_COMMAND, action, data));
    }
    
    public void toggleSoftInput(int showFlags, int hideFlags) {
        mCaller.executeOrSendMessage(mCaller.obtainMessageII(DO_TOGGLE_SOFT_INPUT, showFlags, hideFlags));
    }

    public void finishSession() {
        mCaller.executeOrSendMessage(mCaller.obtainMessage(DO_FINISH_SESSION));
    }
}