/**
* 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.wavepanel.render;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import org.waveprotocol.wave.client.common.util.DomHelper;
import org.waveprotocol.wave.client.doodad.DoodadInstallers.GlobalInstaller;
import org.waveprotocol.wave.client.editor.RenderingMutationHandler;
import org.waveprotocol.wave.client.editor.content.ContentElement;
import org.waveprotocol.wave.model.conversation.Blips;
/**
* Renders an inline anchor as a placeholder element.
*
*/
// Example:
// <reply id="b+g>e"></reply>
// is rendered as:
// <reply ...>b+g>e</reply>
// The <reply> element is intended to be substituted later for the real UI of
// an anchored inline reply.
public class InlineAnchorStaticRenderer extends RenderingMutationHandler {
private InlineAnchorStaticRenderer() {
}
public static GlobalInstaller installer() {
return new GlobalInstaller() {
public void install(org.waveprotocol.wave.client.editor.content.Registries registries) {
InlineAnchorStaticRenderer renderer = new InlineAnchorStaticRenderer();
registries.getElementHandlerRegistry().registerRenderingMutationHandler(
Blips.THREAD_INLINE_ANCHOR_TAGNAME, renderer);
}
};
}
@Override
public Element createDomImpl(Renderable element) {
Element e = Document.get().createElement(Blips.THREAD_INLINE_ANCHOR_TAGNAME);
// Do the things that the doodad API should be doing by default.
DomHelper.setContentEditable(e, false, false);
DomHelper.makeUnselectable(e);
// ContentElement attempts this, and fails, so we have to do this ourselves.
e.getStyle().setProperty("whiteSpace", "normal");
e.getStyle().setProperty("lineHeight", "normal");
return e;
}
@Override
public void onActivatedSubtree(ContentElement element) {
String id = element.getAttribute(Blips.THREAD_INLINE_ANCHOR_ID_ATTR);
if (id != null) {
element.getImplNodelet().setInnerText(id);
}
}
//
// This renderer is only intended for a static rendering,
// and is not intended for keeping that rendering live in response to events.
// Since there is no API for static renderers (all renderers must be
// implemented as mutation handlers), the only way to prevent misuse is to
// detect it dynamically.
//
@Override
public void onAttributeModified(ContentElement element, String name, String oldValue,
String newValue) {
throw new UnsupportedOperationException(
"this render only supports static rendering, not live rendering");
}
}