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/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.commands.nav;
import java.util.List;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.jst.jsf.common.ui.internal.logging.Logger;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.dom.EditHelper;
import org.eclipse.jst.pagedesigner.parts.SubNodeEditPart;
import org.eclipse.jst.pagedesigner.parts.TextEditPart;
import org.eclipse.jst.pagedesigner.validation.caret.ActionData;
import org.eclipse.jst.pagedesigner.validation.caret.IMovementMediator;
import org.eclipse.jst.pagedesigner.validation.caret.InlineEditingNavigationMediator;
import org.eclipse.jst.pagedesigner.viewer.DesignPosition;
import org.eclipse.jst.pagedesigner.viewer.DesignRange;
import org.eclipse.jst.pagedesigner.viewer.DesignRefPosition;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
/**
* @author mengbo
*/
public class HorizontalMoveCommand extends Command implements
ICaretPositionMover {
private static Logger _log = PDPlugin
.getLogger(HorizontalMoveCommand.class);
IHTMLGraphicalViewer _viewer;
boolean _forward;
boolean _onlyMoveEnd;
/**
* @param viewer
* @param b
* @param c
*/
public HorizontalMoveCommand(IHTMLGraphicalViewer viewer, boolean b,
boolean c) {
_viewer = viewer;
_forward = b;
_onlyMoveEnd = c;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#execute()
*/
public void execute() {
DesignPosition position = null;
if (_viewer.isInRangeMode()) {
if (_viewer.getRangeSelection() != null
&& _viewer.getRangeSelection().isValid()) {
position = _viewer.getRangeSelection().getEndPosition();
position = performInlineMode(_forward);
}
} else {
position = performObjectMode();
}
setRange(position);
}
private DesignPosition performObjectMode() {
DesignPosition result = null;
IMovementMediator validator = new InlineEditingNavigationMediator(
new ActionData(ActionData.KEYBOARD_NAVAGATION, null));
DesignPosition position = getCurrentObjectPosition();
if (position != null) {
_viewer.setRange(position, position);
if (!validator.isValidPosition(position)) {
position = performInlineMode(_forward);
if (validator.isValidPosition(position)) {
result = position;
} else {
result = performInlineMode(!_forward);
}
} else {
result = position;
}
}
return result;
}
private DesignPosition performInlineMode(boolean forward) {
DesignRange range = _viewer.getRangeSelection();
if (range == null || !range.isValid()) {
_log.error("invalud range");
return null;
}
DesignPosition position = range.getEndPosition();
if (position.getContainerPart() instanceof TextEditPart) {
int length = ((TextEditPart) position.getContainerPart())
.getTextData().length();
int newoffset = position.getOffset() + (_forward ? 1 : -1);
if (newoffset >= 0 && newoffset <= length) {
DesignPosition newposi = new DesignPosition(position
.getContainerPart(), newoffset);
return newposi;
}
}
DesignPosition newpos = EditHelper.moveToNextEditPosition(
ActionData.KEYBOARD_NAVAGATION, position, forward);
return newpos;
}
private void setRange(DesignPosition newpos) {
if (_onlyMoveEnd) {
_viewer.setRangeEndPosition(newpos);
} else {
_viewer.setRange(newpos, newpos);
}
}
private DesignPosition getCurrentObjectPosition() {
DesignRange result = null;
if (_viewer.isInRangeMode()) {
result = _viewer.getRangeSelection();
} else {
List parts = _viewer.getSelectedEditParts();
if (parts.size() > 0) {
EditPart selection = (EditPart) parts.get(0);
if (selection instanceof SubNodeEditPart) {
DesignPosition position = new DesignRefPosition(selection,
_forward);
result = new DesignRange(position, position);
}
}
}
return result != null && result.isValid() ? result.getEndPosition()
: null;
}
}
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