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/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.texteditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.HelpListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Event;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.util.IPropertyChangeListener;
/**
* An <code>Action</code> wrapper for text widget navigation and selection actions.
* @since 2.0
*/
public class TextNavigationAction extends Action {
/** The text widget */
private StyledText fTextWidget;
/** The styled text action id */
private int fAction;
/**
* Creates a new <code>TextNavigationAction</code>.
* @param textWidget the text widget
* @param action the styled text widget action
*/
public TextNavigationAction(StyledText textWidget, int action) {
fTextWidget= textWidget;
fAction= action;
}
/**
* Returns the text widget this actions is bound to.
*
* @return returns the text widget this actions is bound to
*/
protected StyledText getTextWidget() {
return fTextWidget;
}
@Override
public void run() {
Point selection= fTextWidget.getSelection();
fTextWidget.invokeAction(fAction);
fireSelectionChanged(selection);
}
private void doFireSelectionChanged(Point selection) {
Event event= new Event();
event.x= selection.x;
event.y= selection.y;
fTextWidget.notifyListeners(SWT.Selection, event);
}
/**
* Sends a selection event with the current selection to all
* selection listeners of the action's text widget
*
* @since 3.0
*/
protected void fireSelectionChanged() {
fireSelectionChanged(null);
}
/**
* Fires a selection event to all selection listener of the action's
* text widget if the current selection differs from the given selection.
*
* @param oldSelection the old selection
* @since 3.0
*/
protected void fireSelectionChanged(Point oldSelection) {
Point selection= fTextWidget.getSelection();
if (oldSelection == null || !selection.equals(oldSelection))
doFireSelectionChanged(selection);
}
@Override
public void runWithEvent(Event event) {
run();
}
// ----------------------------------------------------------------------------------------------------------------------------------
// All the subsequent methods are just empty method bodies.
@Override
public void addPropertyChangeListener(IPropertyChangeListener listener) {
}
@Override
public int getAccelerator() {
return 0;
}
@Override
public String getDescription() {
return null;
}
@Override
public ImageDescriptor getDisabledImageDescriptor() {
return null;
}
@Override
public HelpListener getHelpListener() {
return null;
}
@Override
public ImageDescriptor getHoverImageDescriptor() {
return null;
}
@Override
public ImageDescriptor getImageDescriptor() {
return null;
}
@Override
public IMenuCreator getMenuCreator() {
return null;
}
@Override
public int getStyle() {
return 0;
}
@Override
public String getText() {
return null;
}
@Override
public String getToolTipText() {
return null;
}
@Override
public boolean isChecked() {
return false;
}
@Override
public boolean isEnabled() {
return true;
}
@Override
public void removePropertyChangeListener(IPropertyChangeListener listener) {
}
@Override
public void setAccelerator(int keycode) {
}
@Override
public void setChecked(boolean checked) {
}
@Override
public void setDescription(String text) {
}
@Override
public void setDisabledImageDescriptor(ImageDescriptor newImage) {
}
@Override
public void setEnabled(boolean enabled) {
}
@Override
public void setHelpListener(HelpListener listener) {
}
@Override
public void setHoverImageDescriptor(ImageDescriptor newImage) {
}
@Override
public void setImageDescriptor(ImageDescriptor newImage) {
}
@Override
public void setMenuCreator(IMenuCreator creator) {
}
@Override
public void setText(String text) {
}
@Override
public void setToolTipText(String text) {
}
}
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