/**
* Copyright 2011 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.title;
import org.waveprotocol.wave.client.editor.content.AnnotationPainter;
import org.waveprotocol.wave.client.editor.content.AnnotationPainter.PaintFunction;
import org.waveprotocol.wave.client.editor.content.PainterRegistry;
import org.waveprotocol.wave.client.editor.content.Registries;
import org.waveprotocol.wave.model.document.AnnotationBehaviour.AnnotationFamily;
import org.waveprotocol.wave.model.document.AnnotationBehaviour.DefaultAnnotationBehaviour;
import org.waveprotocol.wave.model.document.AnnotationMutationHandler;
import org.waveprotocol.wave.model.document.util.DocumentContext;
import org.waveprotocol.wave.model.util.CollectionUtils;
import org.waveprotocol.wave.model.util.ReadableStringSet;
import java.util.Collections;
import java.util.Map;
/**
* Handler for title annotation.
*
* Delegates to the painter to do rendering.
*
* @author vega113@gmail.com (Yuri Z.)
*/
public class TitleAnnotationHandler implements AnnotationMutationHandler {
private static final String PREFIX = "conv";
/** Map of annotations for the title paint renderer. */
private final static Map<String, String> PAINT_PROPERTIES = Collections.singletonMap(
"fontWeight", "bold");
private static final String KEY = "conv/title";
private static final ReadableStringSet KEYS = CollectionUtils.newStringSet(KEY);
private final AnnotationPainter painter;
private static final PaintFunction renderFunc = new PaintFunction() {
@Override
public Map<String, String> apply(Map<String, Object> from, boolean isEditing) {
if (from.get(KEY) != null) {
return PAINT_PROPERTIES;
} else {
return Collections.emptyMap();
}
}
};
/**
* @param painter painter to use for rendering
*/
public TitleAnnotationHandler(AnnotationPainter painter) {
this.painter = painter;
}
/**
* Creates and registers a title annotation handler
*
* @param registries registry to register on
* @return the new handler
*/
public static void register(Registries registries) {
PainterRegistry painterRegistry = registries.getPaintRegistry();
TitleAnnotationHandler handler = new TitleAnnotationHandler(painterRegistry.getPainter());
registries.getAnnotationHandlerRegistry().registerHandler(PREFIX, handler);
registries.getAnnotationHandlerRegistry().registerBehaviour(PREFIX,
new DefaultAnnotationBehaviour(AnnotationFamily.CONTENT));
painterRegistry.registerPaintFunction(KEYS, renderFunc);
}
@Override
public <N, E extends N, T extends N> void handleAnnotationChange(DocumentContext<N, E, T> bundle,
int start, int end, String key, Object newValue) {
painter.scheduleRepaint(bundle, start, end);
}
}