| /* |
| * 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 com.android.internal.view; |
| |
| import android.os.Bundle; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.util.Log; |
| import android.view.KeyEvent; |
| import android.view.inputmethod.CompletionInfo; |
| import android.view.inputmethod.ExtractedText; |
| import android.view.inputmethod.ExtractedTextRequest; |
| import android.view.inputmethod.InputConnection; |
| |
| public class InputConnectionWrapper implements InputConnection { |
| private static final int MAX_WAIT_TIME_MILLIS = 2000; |
| private final IInputContext mIInputContext; |
| |
| static class InputContextCallback extends IInputContextCallback.Stub { |
| private static final String TAG = "InputConnectionWrapper.ICC"; |
| public int mSeq; |
| public boolean mHaveValue; |
| public CharSequence mTextBeforeCursor; |
| public CharSequence mTextAfterCursor; |
| public CharSequence mSelectedText; |
| public ExtractedText mExtractedText; |
| public int mCursorCapsMode; |
| |
| // A 'pool' of one InputContextCallback. Each ICW request will attempt to gain |
| // exclusive access to this object. |
| private static InputContextCallback sInstance = new InputContextCallback(); |
| private static int sSequenceNumber = 1; |
| |
| /** |
| * Returns an InputContextCallback object that is guaranteed not to be in use by |
| * any other thread. The returned object's 'have value' flag is cleared and its expected |
| * sequence number is set to a new integer. We use a sequence number so that replies that |
| * occur after a timeout has expired are not interpreted as replies to a later request. |
| */ |
| private static InputContextCallback getInstance() { |
| synchronized (InputContextCallback.class) { |
| // Return sInstance if it's non-null, otherwise construct a new callback |
| InputContextCallback callback; |
| if (sInstance != null) { |
| callback = sInstance; |
| sInstance = null; |
| |
| // Reset the callback |
| callback.mHaveValue = false; |
| } else { |
| callback = new InputContextCallback(); |
| } |
| |
| // Set the sequence number |
| callback.mSeq = sSequenceNumber++; |
| return callback; |
| } |
| } |
| |
| /** |
| * Makes the given InputContextCallback available for use in the future. |
| */ |
| private void dispose() { |
| synchronized (InputContextCallback.class) { |
| // If sInstance is non-null, just let this object be garbage-collected |
| if (sInstance == null) { |
| // Allow any objects being held to be gc'ed |
| mTextAfterCursor = null; |
| mTextBeforeCursor = null; |
| mExtractedText = null; |
| sInstance = this; |
| } |
| } |
| } |
| |
| public void setTextBeforeCursor(CharSequence textBeforeCursor, int seq) { |
| synchronized (this) { |
| if (seq == mSeq) { |
| mTextBeforeCursor = textBeforeCursor; |
| mHaveValue = true; |
| notifyAll(); |
| } else { |
| Log.i(TAG, "Got out-of-sequence callback " + seq + " (expected " + mSeq |
| + ") in setTextBeforeCursor, ignoring."); |
| } |
| } |
| } |
| |
| public void setTextAfterCursor(CharSequence textAfterCursor, int seq) { |
| synchronized (this) { |
| if (seq == mSeq) { |
| mTextAfterCursor = textAfterCursor; |
| mHaveValue = true; |
| notifyAll(); |
| } else { |
| Log.i(TAG, "Got out-of-sequence callback " + seq + " (expected " + mSeq |
| + ") in setTextAfterCursor, ignoring."); |
| } |
| } |
| } |
| |
| public void setSelectedText(CharSequence selectedText, int seq) { |
| synchronized (this) { |
| if (seq == mSeq) { |
| mSelectedText = selectedText; |
| mHaveValue = true; |
| notifyAll(); |
| } else { |
| Log.i(TAG, "Got out-of-sequence callback " + seq + " (expected " + mSeq |
| + ") in setSelectedText, ignoring."); |
| } |
| } |
| } |
| |
| public void setCursorCapsMode(int capsMode, int seq) { |
| synchronized (this) { |
| if (seq == mSeq) { |
| mCursorCapsMode = capsMode; |
| mHaveValue = true; |
| notifyAll(); |
| } else { |
| Log.i(TAG, "Got out-of-sequence callback " + seq + " (expected " + mSeq |
| + ") in setCursorCapsMode, ignoring."); |
| } |
| } |
| } |
| |
| public void setExtractedText(ExtractedText extractedText, int seq) { |
| synchronized (this) { |
| if (seq == mSeq) { |
| mExtractedText = extractedText; |
| mHaveValue = true; |
| notifyAll(); |
| } else { |
| Log.i(TAG, "Got out-of-sequence callback " + seq + " (expected " + mSeq |
| + ") in setExtractedText, ignoring."); |
| } |
| } |
| } |
| |
| /** |
| * Waits for a result for up to {@link #MAX_WAIT_TIME_MILLIS} milliseconds. |
| * |
| * <p>The caller must be synchronized on this callback object. |
| */ |
| void waitForResultLocked() { |
| long startTime = SystemClock.uptimeMillis(); |
| long endTime = startTime + MAX_WAIT_TIME_MILLIS; |
| |
| while (!mHaveValue) { |
| long remainingTime = endTime - SystemClock.uptimeMillis(); |
| if (remainingTime <= 0) { |
| Log.w(TAG, "Timed out waiting on IInputContextCallback"); |
| return; |
| } |
| try { |
| wait(remainingTime); |
| } catch (InterruptedException e) { |
| } |
| } |
| } |
| } |
| |
| public InputConnectionWrapper(IInputContext inputContext) { |
| mIInputContext = inputContext; |
| } |
| |
| public CharSequence getTextAfterCursor(int length, int flags) { |
| CharSequence value = null; |
| try { |
| InputContextCallback callback = InputContextCallback.getInstance(); |
| mIInputContext.getTextAfterCursor(length, flags, callback.mSeq, callback); |
| synchronized (callback) { |
| callback.waitForResultLocked(); |
| if (callback.mHaveValue) { |
| value = callback.mTextAfterCursor; |
| } |
| } |
| callback.dispose(); |
| } catch (RemoteException e) { |
| return null; |
| } |
| return value; |
| } |
| |
| public CharSequence getTextBeforeCursor(int length, int flags) { |
| CharSequence value = null; |
| try { |
| InputContextCallback callback = InputContextCallback.getInstance(); |
| mIInputContext.getTextBeforeCursor(length, flags, callback.mSeq, callback); |
| synchronized (callback) { |
| callback.waitForResultLocked(); |
| if (callback.mHaveValue) { |
| value = callback.mTextBeforeCursor; |
| } |
| } |
| callback.dispose(); |
| } catch (RemoteException e) { |
| return null; |
| } |
| return value; |
| } |
| |
| public CharSequence getSelectedText(int flags) { |
| CharSequence value = null; |
| try { |
| InputContextCallback callback = InputContextCallback.getInstance(); |
| mIInputContext.getSelectedText(flags, callback.mSeq, callback); |
| synchronized (callback) { |
| callback.waitForResultLocked(); |
| if (callback.mHaveValue) { |
| value = callback.mSelectedText; |
| } |
| } |
| callback.dispose(); |
| } catch (RemoteException e) { |
| return null; |
| } |
| return value; |
| } |
| |
| public int getCursorCapsMode(int reqModes) { |
| int value = 0; |
| try { |
| InputContextCallback callback = InputContextCallback.getInstance(); |
| mIInputContext.getCursorCapsMode(reqModes, callback.mSeq, callback); |
| synchronized (callback) { |
| callback.waitForResultLocked(); |
| if (callback.mHaveValue) { |
| value = callback.mCursorCapsMode; |
| } |
| } |
| callback.dispose(); |
| } catch (RemoteException e) { |
| return 0; |
| } |
| return value; |
| } |
| |
| public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) { |
| ExtractedText value = null; |
| try { |
| InputContextCallback callback = InputContextCallback.getInstance(); |
| mIInputContext.getExtractedText(request, flags, callback.mSeq, callback); |
| synchronized (callback) { |
| callback.waitForResultLocked(); |
| if (callback.mHaveValue) { |
| value = callback.mExtractedText; |
| } |
| } |
| callback.dispose(); |
| } catch (RemoteException e) { |
| return null; |
| } |
| return value; |
| } |
| |
| public boolean commitText(CharSequence text, int newCursorPosition) { |
| try { |
| mIInputContext.commitText(text, newCursorPosition); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean commitCompletion(CompletionInfo text) { |
| try { |
| mIInputContext.commitCompletion(text); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean setSelection(int start, int end) { |
| try { |
| mIInputContext.setSelection(start, end); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean performEditorAction(int actionCode) { |
| try { |
| mIInputContext.performEditorAction(actionCode); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean performContextMenuAction(int id) { |
| try { |
| mIInputContext.performContextMenuAction(id); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean setComposingRegion(int start, int end) { |
| try { |
| mIInputContext.setComposingRegion(start, end); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean setComposingText(CharSequence text, int newCursorPosition) { |
| try { |
| mIInputContext.setComposingText(text, newCursorPosition); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean finishComposingText() { |
| try { |
| mIInputContext.finishComposingText(); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean beginBatchEdit() { |
| try { |
| mIInputContext.beginBatchEdit(); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean endBatchEdit() { |
| try { |
| mIInputContext.endBatchEdit(); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean sendKeyEvent(KeyEvent event) { |
| try { |
| mIInputContext.sendKeyEvent(event); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean clearMetaKeyStates(int states) { |
| try { |
| mIInputContext.clearMetaKeyStates(states); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean deleteSurroundingText(int leftLength, int rightLength) { |
| try { |
| mIInputContext.deleteSurroundingText(leftLength, rightLength); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean reportFullscreenMode(boolean enabled) { |
| try { |
| mIInputContext.reportFullscreenMode(enabled); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| |
| public boolean performPrivateCommand(String action, Bundle data) { |
| try { |
| mIInputContext.performPrivateCommand(action, data); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } |
| } |
| } |