/**
* 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.selection.content;
import org.waveprotocol.wave.client.editor.EditorStaticDeps;
import org.waveprotocol.wave.client.editor.content.ContentNode;
import org.waveprotocol.wave.client.editor.extract.InconsistencyException.HtmlInserted;
import org.waveprotocol.wave.client.editor.extract.InconsistencyException.HtmlMissing;
import org.waveprotocol.wave.client.editor.impl.NodeManager;
import org.waveprotocol.wave.client.editor.selection.html.JsRange;
import org.waveprotocol.wave.client.editor.selection.html.SelectionW3CNative;
import org.waveprotocol.wave.client.editor.selection.html.SelectionWebkit;
import org.waveprotocol.wave.client.editor.selection.html.SelectionWebkit.Direction;
import org.waveprotocol.wave.client.editor.selection.html.SelectionWebkit.MoveUnit;
import org.waveprotocol.wave.model.document.util.Point;
/**
* Caret movement using Webkit's extensions to Selection.
*
*/
public class CaretMovementHelperWebkitImpl implements CaretMovementHelper {
private final NodeManager nodeManager;
public CaretMovementHelperWebkitImpl(NodeManager nodeManager) {
this.nodeManager = nodeManager;
}
public Point<ContentNode> getWordBoundary(boolean forward) {
Point<ContentNode> boundary = null;
SelectionWebkit s = SelectionWebkit.getSelection();
if (forward) {
s.move(Direction.FORWARD, MoveUnit.WORD);
} else {
s.move(Direction.BACKWARD, MoveUnit.WORD);
}
try {
SelectionW3CNative selection = SelectionW3CNative.getSelectionGuarded();
JsRange range = s.getRangeAt(0);
boundary = nodeManager.nodeOffsetToWrapperPoint(
selection.focusNode(), selection.focusOffset());
} catch (HtmlMissing e) {
EditorStaticDeps.logger.fatal().log("html missing not handled", e);
} catch (HtmlInserted e) {
EditorStaticDeps.logger.fatal().log("html inserted not handled", e);
}
return boundary;
}
}