| /* |
| * Copyright (C) 2007 Esmertec AG. |
| * Copyright (C) 2007 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.mms.dom.events; |
| |
| import java.util.ArrayList; |
| |
| import org.w3c.dom.events.Event; |
| import org.w3c.dom.events.EventException; |
| import org.w3c.dom.events.EventListener; |
| import org.w3c.dom.events.EventTarget; |
| |
| import android.util.Log; |
| |
| public class EventTargetImpl implements EventTarget { |
| private static final String TAG = "EventTargetImpl"; |
| private ArrayList<EventListenerEntry> mListenerEntries; |
| private EventTarget mNodeTarget; |
| |
| static class EventListenerEntry |
| { |
| final String mType; |
| final EventListener mListener; |
| final boolean mUseCapture; |
| |
| EventListenerEntry(String type, EventListener listener, boolean useCapture) |
| { |
| mType = type; |
| mListener = listener; |
| mUseCapture = useCapture; |
| } |
| } |
| |
| public EventTargetImpl(EventTarget target) { |
| mNodeTarget = target; |
| } |
| |
| public void addEventListener(String type, EventListener listener, boolean useCapture) { |
| if ((type == null) || type.equals("") || (listener == null)) { |
| return; |
| } |
| |
| // Make sure we have only one entry |
| removeEventListener(type, listener, useCapture); |
| |
| if (mListenerEntries == null) { |
| mListenerEntries = new ArrayList<EventListenerEntry>(); |
| } |
| mListenerEntries.add(new EventListenerEntry(type, listener, useCapture)); |
| } |
| |
| public boolean dispatchEvent(Event evt) throws EventException { |
| // We need to use the internal APIs to modify and access the event status |
| EventImpl eventImpl = (EventImpl)evt; |
| |
| if (!eventImpl.isInitialized()) { |
| throw new EventException(EventException.UNSPECIFIED_EVENT_TYPE_ERR, |
| "Event not initialized"); |
| } else if ((eventImpl.getType() == null) || eventImpl.getType().equals("")) { |
| throw new EventException(EventException.UNSPECIFIED_EVENT_TYPE_ERR, |
| "Unspecified even type"); |
| } |
| |
| // Initialize event status |
| eventImpl.setTarget(mNodeTarget); |
| |
| // TODO: At this point, to support event capturing and bubbling, we should |
| // establish the chain of EventTargets from the top of the tree to this |
| // event's target. |
| |
| // TODO: CAPTURING_PHASE skipped |
| |
| // Handle AT_TARGET |
| // Invoke handleEvent of non-capturing listeners on this EventTarget. |
| eventImpl.setEventPhase(Event.AT_TARGET); |
| eventImpl.setCurrentTarget(mNodeTarget); |
| if (!eventImpl.isPropogationStopped() && (mListenerEntries != null)) { |
| for (int i = 0; i < mListenerEntries.size(); i++) { |
| EventListenerEntry listenerEntry = mListenerEntries.get(i); |
| if (!listenerEntry.mUseCapture |
| && listenerEntry.mType.equals(eventImpl.getType())) { |
| try { |
| listenerEntry.mListener.handleEvent(eventImpl); |
| } |
| catch (Exception e) { |
| // Any exceptions thrown inside an EventListener will |
| // not stop propagation of the event |
| Log.w(TAG, "Catched EventListener exception", e); |
| } |
| } |
| } |
| } |
| |
| if (eventImpl.getBubbles()) { |
| // TODO: BUBBLING_PHASE skipped |
| } |
| |
| return eventImpl.isPreventDefault(); |
| } |
| |
| public void removeEventListener(String type, EventListener listener, |
| boolean useCapture) { |
| if (null == mListenerEntries) { |
| return; |
| } |
| for (int i = 0; i < mListenerEntries.size(); i ++) { |
| EventListenerEntry listenerEntry = mListenerEntries.get(i); |
| if ((listenerEntry.mUseCapture == useCapture) |
| && (listenerEntry.mListener == listener) |
| && listenerEntry.mType.equals(type)) { |
| mListenerEntries.remove(i); |
| break; |
| } |
| } |
| } |
| |
| } |