/**
* 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.experimental.htmltemplate;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Widget;
import org.waveprotocol.wave.client.editor.content.ContentElement;
import org.waveprotocol.wave.client.editor.content.ContentNode;
import org.waveprotocol.wave.client.editor.gwt.GwtRenderingMutationHandler;
/**
* Renderer for <template> nodes. Creates the top-level widget.
*
* @author jasvir@google.com (Jasvir Nagra)
* @author ihab@google.com (Ihab Awad)
* @author stay@google.com (Mike Stay)
*/
final class TemplateNodeMutationHandler extends GwtRenderingMutationHandler {
interface PluginContextFactory {
PluginContext create(ContentElement doodad);
}
/** Cajoler used to serve content into each doodad. */
private final CajolerFacade cajoler;
/** Factory for context objects for each doodad. */
private final PluginContextFactory contextFactory;
private TemplateNodeMutationHandler(CajolerFacade cajoler, PluginContextFactory contextFactory) {
// TODO(ihab): The flow is not statically known for the arbitrary plugin
// case. Discuss implications with danilatos@.
super(Flow.INLINE);
this.cajoler = cajoler;
this.contextFactory = contextFactory;
}
/**
* Creates a renderer for <template> doodads.
*/
static TemplateNodeMutationHandler create() {
final PartIdFactory partIdFactory = SessionPartIdFactory.get();
CajolerFacade cajoler = CajolerFacade.instance();
final JavaScriptObject taming = cajoler.getTaming();
PluginContextFactory defaultFactory = new PluginContextFactory() {
@Override
public PluginContext create(ContentElement doodad) {
return new PluginContext(doodad, partIdFactory, taming);
}
};
return new TemplateNodeMutationHandler(cajoler, defaultFactory);
}
@Override
protected Widget createGwtWidget(Renderable element) {
HTML widget = new HTML();
element.setProperty(HtmlTemplate.TEMPLATE_WIDGET, widget);
// Do the things that the doodad API should be doing by default.
// ContentElement attempts this, and fails, so we have to do this ourselves.
widget.getElement().getStyle().setProperty("whiteSpace", "normal");
widget.getElement().getStyle().setProperty("lineHeight", "normal");
return widget;
}
@Override
public void onActivatedSubtree(ContentElement doodad) {
super.onActivatedSubtree(doodad);
PluginContext pluginContext = contextFactory.create(doodad);
doodad.setProperty(HtmlTemplate.TEMPLATE_PLUGIN_CONTEXT, pluginContext);
cajoler.instantiateDoodadInHTML(
doodad.getProperty(HtmlTemplate.TEMPLATE_WIDGET),
pluginContext,
doodad.getAttribute(HtmlTemplate.TEMPLATE_URL_ATTR));
pluginContext.onActivated();
}
@Override
public void onChildAdded(ContentElement htmlTemplate, ContentNode child) {
super.onChildAdded(htmlTemplate, child);
getContext(htmlTemplate).onHtmlTemplateChildAdded(child);
}
@Override
public void onChildRemoved(ContentElement htmlTemplate, ContentNode child) {
super.onChildRemoved(htmlTemplate, child);
getContext(htmlTemplate).onHtmlTemplateChildRemoved(child);
}
@Override
public void onDeactivated(ContentElement htmlTemplate) {
super.onDeactivated(htmlTemplate);
getContext(htmlTemplate).onDeactivated();
htmlTemplate.setProperty(HtmlTemplate.TEMPLATE_PLUGIN_CONTEXT, null);
}
private PluginContext getContext(ContentElement experimental) {
return experimental.getProperty(HtmlTemplate.TEMPLATE_PLUGIN_CONTEXT);
}
}