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/*
* 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.inputmethod.keyboard.internal;
import android.os.Message;
import android.os.SystemClock;
import android.view.ViewConfiguration;
import com.android.inputmethod.keyboard.Key;
import com.android.inputmethod.keyboard.PointerTracker;
import com.android.inputmethod.keyboard.PointerTracker.TimerProxy;
import com.android.inputmethod.keyboard.internal.TimerHandler.Callbacks;
import com.android.inputmethod.latin.Constants;
import com.android.inputmethod.latin.utils.LeakGuardHandlerWrapper;
// TODO: Separate this class into KeyTimerHandler and BatchInputTimerHandler or so.
public final class TimerHandler extends LeakGuardHandlerWrapper<Callbacks> implements TimerProxy {
public interface Callbacks {
public void startWhileTypingFadeinAnimation();
public void startWhileTypingFadeoutAnimation();
public void onLongPress(PointerTracker tracker);
}
private static final int MSG_TYPING_STATE_EXPIRED = 0;
private static final int MSG_REPEAT_KEY = 1;
private static final int MSG_LONGPRESS_KEY = 2;
private static final int MSG_LONGPRESS_SHIFT_KEY = 3;
private static final int MSG_DOUBLE_TAP_SHIFT_KEY = 4;
private static final int MSG_UPDATE_BATCH_INPUT = 5;
private final int mIgnoreAltCodeKeyTimeout;
private final int mGestureRecognitionUpdateTime;
public TimerHandler(final Callbacks ownerInstance, final int ignoreAltCodeKeyTimeout,
final int gestureRecognitionUpdateTime) {
super(ownerInstance);
mIgnoreAltCodeKeyTimeout = ignoreAltCodeKeyTimeout;
mGestureRecognitionUpdateTime = gestureRecognitionUpdateTime;
}
@Override
public void handleMessage(final Message msg) {
final Callbacks callbacks = getOwnerInstance();
if (callbacks == null) {
return;
}
final PointerTracker tracker = (PointerTracker) msg.obj;
switch (msg.what) {
case MSG_TYPING_STATE_EXPIRED:
callbacks.startWhileTypingFadeinAnimation();
break;
case MSG_REPEAT_KEY:
tracker.onKeyRepeat(msg.arg1 /* code */, msg.arg2 /* repeatCount */);
break;
case MSG_LONGPRESS_KEY:
case MSG_LONGPRESS_SHIFT_KEY:
cancelLongPressTimers();
callbacks.onLongPress(tracker);
break;
case MSG_UPDATE_BATCH_INPUT:
tracker.updateBatchInputByTimer(SystemClock.uptimeMillis());
startUpdateBatchInputTimer(tracker);
break;
}
}
@Override
public void startKeyRepeatTimerOf(final PointerTracker tracker, final int repeatCount,
final int delay) {
final Key key = tracker.getKey();
if (key == null || delay == 0) {
return;
}
sendMessageDelayed(
obtainMessage(MSG_REPEAT_KEY, key.getCode(), repeatCount, tracker), delay);
}
private void cancelKeyRepeatTimerOf(final PointerTracker tracker) {
removeMessages(MSG_REPEAT_KEY, tracker);
}
public void cancelKeyRepeatTimers() {
removeMessages(MSG_REPEAT_KEY);
}
// TODO: Suppress layout changes in key repeat mode
public boolean isInKeyRepeat() {
return hasMessages(MSG_REPEAT_KEY);
}
@Override
public void startLongPressTimerOf(final PointerTracker tracker, final int delay) {
final Key key = tracker.getKey();
if (key == null) {
return;
}
// Use a separate message id for long pressing shift key, because long press shift key
// timers should be canceled when other key is pressed.
final int messageId = (key.getCode() == Constants.CODE_SHIFT)
? MSG_LONGPRESS_SHIFT_KEY : MSG_LONGPRESS_KEY;
sendMessageDelayed(obtainMessage(messageId, tracker), delay);
}
@Override
public void cancelLongPressTimerOf(final PointerTracker tracker) {
removeMessages(MSG_LONGPRESS_KEY, tracker);
removeMessages(MSG_LONGPRESS_SHIFT_KEY, tracker);
}
@Override
public void cancelLongPressShiftKeyTimers() {
removeMessages(MSG_LONGPRESS_SHIFT_KEY);
}
public void cancelLongPressTimers() {
removeMessages(MSG_LONGPRESS_KEY);
removeMessages(MSG_LONGPRESS_SHIFT_KEY);
}
@Override
public void startTypingStateTimer(final Key typedKey) {
if (typedKey.isModifier() || typedKey.altCodeWhileTyping()) {
return;
}
final boolean isTyping = isTypingState();
removeMessages(MSG_TYPING_STATE_EXPIRED);
final Callbacks callbacks = getOwnerInstance();
if (callbacks == null) {
return;
}
// When user hits the space or the enter key, just cancel the while-typing timer.
final int typedCode = typedKey.getCode();
if (typedCode == Constants.CODE_SPACE || typedCode == Constants.CODE_ENTER) {
if (isTyping) {
callbacks.startWhileTypingFadeinAnimation();
}
return;
}
sendMessageDelayed(
obtainMessage(MSG_TYPING_STATE_EXPIRED), mIgnoreAltCodeKeyTimeout);
if (isTyping) {
return;
}
callbacks.startWhileTypingFadeoutAnimation();
}
@Override
public boolean isTypingState() {
return hasMessages(MSG_TYPING_STATE_EXPIRED);
}
@Override
public void startDoubleTapShiftKeyTimer() {
sendMessageDelayed(obtainMessage(MSG_DOUBLE_TAP_SHIFT_KEY),
ViewConfiguration.getDoubleTapTimeout());
}
@Override
public void cancelDoubleTapShiftKeyTimer() {
removeMessages(MSG_DOUBLE_TAP_SHIFT_KEY);
}
@Override
public boolean isInDoubleTapShiftKeyTimeout() {
return hasMessages(MSG_DOUBLE_TAP_SHIFT_KEY);
}
@Override
public void cancelKeyTimersOf(final PointerTracker tracker) {
cancelKeyRepeatTimerOf(tracker);
cancelLongPressTimerOf(tracker);
}
public void cancelAllKeyTimers() {
cancelKeyRepeatTimers();
cancelLongPressTimers();
}
@Override
public void startUpdateBatchInputTimer(final PointerTracker tracker) {
if (mGestureRecognitionUpdateTime <= 0) {
return;
}
removeMessages(MSG_UPDATE_BATCH_INPUT, tracker);
sendMessageDelayed(obtainMessage(MSG_UPDATE_BATCH_INPUT, tracker),
mGestureRecognitionUpdateTime);
}
@Override
public void cancelUpdateBatchInputTimer(final PointerTracker tracker) {
removeMessages(MSG_UPDATE_BATCH_INPUT, tracker);
}
@Override
public void cancelAllUpdateBatchInputTimers() {
removeMessages(MSG_UPDATE_BATCH_INPUT);
}
public void cancelAllMessages() {
cancelAllKeyTimers();
cancelAllUpdateBatchInputTimers();
}
}
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