/**
* Copyright 2009 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.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;
}
}