/**
* Copyright 2010 Google Inc.
*
* 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 org.waveprotocol.wave.client.doodad.form.button;
import org.waveprotocol.wave.client.doodad.form.events.ContentEvents;
import org.waveprotocol.wave.client.editor.ElementHandlerRegistry;
import org.waveprotocol.wave.client.editor.NodeEventHandler;
import org.waveprotocol.wave.client.editor.NodeEventHandlerImpl;
import org.waveprotocol.wave.client.editor.content.ContentElement;
import org.waveprotocol.wave.client.editor.content.ContentNode;
import org.waveprotocol.wave.client.editor.content.NodeEventRouter;
import org.waveprotocol.wave.client.editor.content.misc.Caption;
import org.waveprotocol.wave.client.editor.event.EditorEvent;
import org.waveprotocol.wave.client.widget.button.ClickButton;
import org.waveprotocol.wave.model.document.util.Property;
import org.waveprotocol.wave.model.document.util.XmlStringBuilder;
public final class Button {
private static final String TAGNAME = "button";
static final Property<ClickButton> BUTTON_LOGIC_PROP = Property.immutable("button_logic");
private static final ButtonRenderingMutationHandler RENDERING_MUTATION_HANDLER =
new ButtonRenderingMutationHandler();
private static final NodeEventHandler NODE_EVENT_HANDLER = new NodeEventHandlerImpl() {
// TODO(patcoleman): Consider overriding handleBackspaceAfterNode so that buttons are harder to
// delete.
@Override
public boolean handleClick(ContentElement element, EditorEvent event) {
ContentNode last = element.getLastChild();
ContentNode events = (last != null && ContentEvents.isContentEvents(last)) ?
last : null;
if (events != null && NodeEventRouter.INSTANCE.handleClick(events, event)) {
return true;
} else {
return false;
}
}
};
/**
* Registers subclass with ContentElement
*/
public static void register(
final ElementHandlerRegistry registry) {
registry.registerEventHandler(TAGNAME, NODE_EVENT_HANDLER);
registry.registerRenderingMutationHandler(TAGNAME, RENDERING_MUTATION_HANDLER);
}
/**
* @param caption
* @param name
* @return A content xml string containing n button
*/
public static XmlStringBuilder constructXml(
XmlStringBuilder caption, String name) {
return Caption.constructXml(caption)
.append(ContentEvents.constructXml())
.wrap(TAGNAME, ContentElement.NAME, name);
}
/** Utility class */
private Button() {
}
}