/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.editor.toolbar;
import org.waveprotocol.wave.client.editor.EditorContext;
import org.waveprotocol.wave.client.editor.content.paragraph.Paragraph;
import org.waveprotocol.wave.client.editor.toolbar.ButtonUpdater.Controller;
import org.waveprotocol.wave.client.widget.toolbar.buttons.ToolbarToggleButton;
import org.waveprotocol.wave.model.document.util.Range;
/**
* A {@link ToolbarToggleButton.Listener} which applies a styling to a paragraph
* using {@link Paragraph#apply} and synchronizes the toggle state of a button
* with the styling applied to the current selection.
* <p>
* See {@link org.waveprotocol.wave.client.wavepanel.impl.toolbar.EditToolbar}
* for example uses.
*
* @author kalman@google.com (Benjamin Kalman)
*/
public class ParagraphApplicationController implements ToolbarToggleButton.Listener, Controller {
private final ToolbarToggleButton button;
private final EditorContext editor;
private final Paragraph.LineStyle style;
public ParagraphApplicationController(ToolbarToggleButton button, EditorContext editor,
Paragraph.LineStyle style) {
this.button = button;
this.editor = editor;
this.style = style;
}
@Override
public void onToggledOn() {
setParagraphStyle(true);
}
@Override
public void onToggledOff() {
setParagraphStyle(false);
}
private void setParagraphStyle(final boolean isOn) {
final Range range = editor.getSelectionHelper().getOrderedSelectionRange();
if (range != null) {
editor.undoableSequence(new Runnable() {
@Override public void run() {
Paragraph.apply(editor.getDocument(), range.getStart(), range.getEnd(), style, isOn);
}
});
}
}
@Override
public void update(Range range) {
button.setToggledOn(Paragraph.appliesEntirely(editor.getDocument(), range.getStart(), range
.getEnd(), style));
}
}