| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| package org.mozc.android.inputmethod.japanese; |
| |
| import org.mozc.android.inputmethod.japanese.keyboard.Flick; |
| import org.mozc.android.inputmethod.japanese.keyboard.Flick.Direction; |
| import org.mozc.android.inputmethod.japanese.keyboard.Key; |
| import org.mozc.android.inputmethod.japanese.keyboard.Key.Stick; |
| import org.mozc.android.inputmethod.japanese.keyboard.KeyEntity; |
| import org.mozc.android.inputmethod.japanese.keyboard.KeyEventContext; |
| import org.mozc.android.inputmethod.japanese.keyboard.KeyEventHandler; |
| import org.mozc.android.inputmethod.japanese.keyboard.KeyState; |
| import org.mozc.android.inputmethod.japanese.protobuf.ProtoCommands.Input.TouchAction; |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.View.OnTouchListener; |
| |
| import java.util.Collections; |
| |
| /** |
| * This class is an event listener for a view which sends a key to MozcServer. |
| * |
| * Note that currently, we assume all key are repeatable based on our |
| * requirements. We can easily support non repeatable key if necessary. |
| * |
| */ |
| public class KeyEventButtonTouchListener implements OnTouchListener { |
| private final int sourceId; |
| private final int keyCode; |
| private KeyEventHandler keyEventHandler = null; |
| @VisibleForTesting KeyEventContext keyEventContext = null; |
| |
| /** |
| * This is exported as protected for testing. |
| */ |
| protected KeyEventButtonTouchListener(int sourceId, int keyCode) { |
| this.sourceId = sourceId; |
| this.keyCode = keyCode; |
| } |
| |
| /** |
| * Resets the internal state of this listener. |
| * This is exported as protected for testing. |
| */ |
| protected void reset() { |
| KeyEventHandler keyEventHandler = this.keyEventHandler; |
| KeyEventContext keyEventContext = this.keyEventContext; |
| if (keyEventHandler != null && keyEventContext != null) { |
| keyEventHandler.cancelDelayedKeyEvent(keyEventContext); |
| } |
| this.keyEventContext = null; |
| } |
| |
| /** |
| * Sets a new event handler to this instance. |
| * This is exported as protected for testing. |
| */ |
| protected void setKeyEventHandler(KeyEventHandler keyEventHandler) { |
| // We'll detach the current event context from the old key event handler. |
| reset(); |
| this.keyEventHandler = keyEventHandler; |
| } |
| |
| /** |
| * Creates a (pseudo) {@link Key} instance based on the given {@code button} and its |
| * {@code keyCode}. |
| * This is exported as package private for testing. |
| */ |
| static Key createKey(View button, int sourceId, int keyCode) { |
| KeyEntity keyEntity = |
| new KeyEntity(sourceId, keyCode, KeyEntity.INVALID_KEY_CODE, 0, null, null, false, null); |
| Flick flick = new Flick(Direction.CENTER, keyEntity); |
| KeyState keyState = |
| new KeyState("", |
| Collections.<KeyState.MetaState>emptySet(), |
| Collections.<KeyState.MetaState>emptySet(), |
| Collections.<KeyState.MetaState>emptySet(), |
| Collections.singletonList(flick)); |
| // Now, we support repetable keys only. |
| return new Key(0, 0, button.getWidth(), button.getHeight(), 0, 0, |
| true, false, false, Stick.EVEN, Collections.singletonList(keyState)); |
| } |
| |
| private static KeyEventContext createKeyEventContext( |
| View button, int sourceId, int keyCode, float x, float y) { |
| Key key = createKey(button, sourceId, keyCode); |
| View parent = View.class.cast(button.getParent()); |
| return new KeyEventContext( |
| key, 0, x, y, parent.getWidth(), parent.getHeight(), 0, |
| Collections.<KeyState.MetaState>emptySet()); |
| } |
| |
| /** |
| * Handles the button view's down event. |
| * This is exported as package private for testing purpose. |
| */ |
| void onDown(View button, float x, float y) { |
| button.setPressed(true); |
| |
| KeyEventHandler keyEventHandler = this.keyEventHandler; |
| if (keyEventHandler != null) { |
| // At first, cancel pending repeat events and overwrite it by the given keyCode. |
| KeyEventContext oldKeyEventContext = this.keyEventContext; |
| if (oldKeyEventContext != null) { |
| keyEventHandler.cancelDelayedKeyEvent(keyEventContext); |
| } |
| |
| // Then create and start running new event. Note that we don't need create it |
| // if keyEventHandler is not set, because it will be reset in setKeyEventHandler |
| // when a new keyEventHandler is set. |
| KeyEventContext newContext = createKeyEventContext(button, sourceId, keyCode, x, y); |
| newContext.update(x, y, TouchAction.TOUCH_DOWN, 0); |
| keyEventHandler.maybeStartDelayedKeyEvent(newContext); |
| keyEventHandler.sendPress(newContext.getPressedKeyCode()); |
| this.keyEventContext = newContext; |
| } |
| } |
| |
| /** |
| * Handles the button view's up event. |
| * This is exported as package private for testing purpose. |
| */ |
| void onUp(View button, float x, float y, long timestamp) { |
| button.setPressed(false); |
| |
| KeyEventHandler keyEventHandler = this.keyEventHandler; |
| KeyEventContext keyEventContext = this.keyEventContext; |
| if (keyEventHandler != null && keyEventContext != null) { |
| keyEventContext.update(x, y, TouchAction.TOUCH_UP, timestamp); |
| keyEventHandler.cancelDelayedKeyEvent(keyEventContext); |
| keyEventHandler.sendKey(keyEventContext.getKeyCode(), |
| Collections.singletonList(keyEventContext.getTouchEvent())); |
| keyEventHandler.sendRelease(keyEventContext.getPressedKeyCode()); |
| } |
| this.keyEventContext = null; |
| } |
| |
| /** |
| * Handles the button view's move event. |
| * This is exported as package private for testing purpose. |
| */ |
| void onMove(float x, float y, long timestamp) { |
| KeyEventContext keyEventContext = this.keyEventContext; |
| if (keyEventContext != null && |
| keyEventContext.update(x, y, TouchAction.TOUCH_MOVE, timestamp)) { |
| // Here, the user's touching point is moved to outside of the button view, |
| // so cancel the repeating key event. |
| KeyEventHandler keyEventHandler = this.keyEventHandler; |
| if (keyEventHandler != null) { |
| keyEventHandler.cancelDelayedKeyEvent(keyEventContext); |
| } |
| this.keyEventContext = null; |
| } |
| } |
| |
| @Override |
| public boolean onTouch(View button, MotionEvent event) { |
| switch (event.getAction() & MotionEvent.ACTION_MASK) { |
| case MotionEvent.ACTION_DOWN: |
| onDown(button, event.getX(), event.getY()); |
| break; |
| case MotionEvent.ACTION_UP: |
| onUp(button, event.getX(), event.getY(), event.getEventTime() - event.getDownTime()); |
| break; |
| case MotionEvent.ACTION_MOVE: |
| onMove(event.getX(), event.getY(), event.getEventTime() - event.getDownTime()); |
| break; |
| default: |
| // Ignore other events intentionally. |
| } |
| |
| // Consume all the events here in order not to propagate the event to views behind the button. |
| return true; |
| } |
| } |