/**
* 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 org.waveprotocol.wave.client.common.util.LogicalPanel;
import org.waveprotocol.wave.client.common.util.StringSequence;
import org.waveprotocol.wave.client.editor.content.Registries;
import org.waveprotocol.wave.client.wave.DocumentRegistry;
import org.waveprotocol.wave.client.wave.InteractiveDocument;
import org.waveprotocol.wave.client.wavepanel.view.AnchorView;
import org.waveprotocol.wave.client.wavepanel.view.InlineThreadView;
import org.waveprotocol.wave.client.wavepanel.view.ViewIdMapper;
import org.waveprotocol.wave.client.wavepanel.view.dom.BlipMetaDomImpl;
import org.waveprotocol.wave.client.wavepanel.view.dom.BlipViewDomImpl;
import org.waveprotocol.wave.client.wavepanel.view.dom.DomAsViewProvider;
import org.waveprotocol.wave.client.wavepanel.view.dom.ModelAsViewProvider;
import org.waveprotocol.wave.client.wavepanel.view.dom.full.BlipQueueRenderer.PagingHandler;
import org.waveprotocol.wave.client.wavepanel.view.impl.BlipMetaViewImpl;
import org.waveprotocol.wave.client.wavepanel.view.impl.BlipViewImpl;
import org.waveprotocol.wave.model.conversation.ConversationBlip;
/**
* Transfers blips between their paged in and paged out states.
*
*/
public final class BlipPager implements PagingHandler {
/** Fills in an existing blip view. */
private final ShallowBlipRenderer blipPopulator;
/** Provides access to the document implementation of a blip. */
private final DocProvider docProvider;
/** Interprets DOM elements as views. */
private final DomAsViewProvider views;
/** Get the view for a particular model */
private final ModelAsViewProvider viewProvider;
/** Reveals the registries to use to render a document. */
private final DocumentRegistries registries;
/** Logical panel for widgets in paged-in blips to attach themselves to */
private final LogicalPanel logicalPanel;
/**
* Maps models to implementations.
*/
interface DocProvider {
InteractiveDocument docOf(ConversationBlip blip);
}
private BlipPager(DocumentRegistries registries, ShallowBlipRenderer blipPopulator,
DocProvider docProvider, DomAsViewProvider views, ModelAsViewProvider viewProvider,
LogicalPanel logicalPanel) {
this.registries = registries;
this.blipPopulator = blipPopulator;
this.docProvider = docProvider;
this.views = views;
this.viewProvider = viewProvider;
this.logicalPanel = logicalPanel;
}
/**
* Creates a pager.
*/
public static BlipPager create(final DocumentRegistry<? extends InteractiveDocument> docRegistry,
DocumentRegistries registries, DomAsViewProvider views, ModelAsViewProvider viewProvider,
ShallowBlipRenderer blipPopulator, LogicalPanel logicalPanel) {
DocProvider docProvider = new DocProvider() {
@Override
public InteractiveDocument docOf(ConversationBlip blip) {
return docRegistry.get(blip);
}
};
return new BlipPager(registries, blipPopulator, docProvider, views, viewProvider, logicalPanel);
}
/**
* Moves all the inline replies of a blip to their default-anchor locations.
*/
private void saveInlineReplies(BlipMetaDomImpl metaDom) {
// Iteration is done via ids, in order to identify the thread to get the
// inline -> default location mapping.
StringSequence inlineLocators = metaDom.getInlineLocators();
String inlineId = inlineLocators.getFirst();
while (inlineId != null) {
AnchorView inlineUi = views.asAnchor(Document.get().getElementById(inlineId));
InlineThreadView threadUi = inlineUi.getThread();
if (threadUi != null) {
// Move to default location.
String defaultId = ViewIdMapper.defaultOfInlineAnchor(inlineId);
AnchorView defaultUi = views.asAnchor(Document.get().getElementById(defaultId));
inlineUi.detach(threadUi);
defaultUi.attach(threadUi);
}
inlineId = inlineLocators.getNext(inlineId);
}
}
@SuppressWarnings("unchecked")
@Override
public void pageIn(ConversationBlip blip) {
BlipViewImpl<BlipViewDomImpl> blipUi =
(BlipViewImpl<BlipViewDomImpl>) viewProvider.getBlipView(blip);
if (blipUi != null) {
BlipViewDomImpl blipDom = blipUi.getIntrinsic();
BlipMetaDomImpl metaDom =
((BlipMetaViewImpl<BlipMetaDomImpl>) blipUi.getMeta()).getIntrinsic();
InteractiveDocument doc = docProvider.docOf(blip);
Registries r = registries.get(blip);
// Very first thing that must be done is to extract and save the DOM of
// inline threads, since content-document rendering will blast them away.
saveInlineReplies(metaDom);
// Clear content before rendering, so that doodad events caused by rendering
// apply on a fresh state.
metaDom.clearContent();
doc.startRendering(r, logicalPanel);
metaDom.setContent(
doc.getDocument().getFullContentView().getDocumentElement().getImplNodelet());
blipPopulator.render(blip, metaDom);
}
}
@SuppressWarnings("unchecked")
@Override
public void pageOut(ConversationBlip blip) {
BlipViewImpl<BlipViewDomImpl> blipUi =
(BlipViewImpl<BlipViewDomImpl>) viewProvider.getBlipView(blip);
if (blipUi != null) {
BlipViewDomImpl blipDom = blipUi.getIntrinsic();
BlipMetaDomImpl metaDom =
((BlipMetaViewImpl<BlipMetaDomImpl>) blipUi.getMeta()).getIntrinsic();
InteractiveDocument doc = docProvider.docOf(blip);
// TODO: remove meta instead
doc.stopRendering();
metaDom.setContent(null);
}
}
}