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/*******************************************************************************
* Copyright (c) 2006, 2011 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.pde.internal.ui.editor.plugin;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.pde.core.plugin.IPluginExtension;
import org.eclipse.pde.core.plugin.IPluginObject;
import org.eclipse.pde.internal.core.ischema.ISchemaAttribute;
import org.eclipse.pde.internal.core.schema.SchemaRootElement;
import org.eclipse.pde.internal.core.text.IDocumentAttributeNode;
import org.eclipse.pde.internal.core.text.IDocumentRange;
import org.eclipse.pde.internal.ui.editor.text.XMLUtil;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.Point;
public class ExtensionAttributePointDectector implements MouseListener, KeyListener {
private ManifestSourcePage fSourcePage;
private StyledText fStyledText;
private ISelection fSelection;
public ExtensionAttributePointDectector() {
fSelection = null;
fStyledText = null;
fSourcePage = null;
}
public ISelection getSelection() {
return fSelection;
}
public void setTextEditor(ManifestSourcePage editor) {
fSourcePage = editor;
// Get the new styled text widget
ISourceViewer viewer = fSourcePage.getViewer();
// If the source viewer is not initialized, we can't do anything here
if (viewer == null) {
return;
}
StyledText newStyledText = viewer.getTextWidget();
// If the new styled text equals the old one, keep the old one
if ((fStyledText != null) && fStyledText.equals(newStyledText)) {
return;
}
// Remove the listeners on the old styled text
removeListeners();
// Replace the old with the new
fStyledText = newStyledText;
// Add the listeners to the new styled text
addListeners();
// Enable this action if the selection is within the point attribute on
// an extension
checkIfOnTarget();
}
private void checkIfOnTarget() {
// Reset the Selection
fSelection = null;
// Ensure the input is valid
if (isInputInitialized() == false) {
return;
}
// Get the region selected
Point selectionPoint = fStyledText.getSelection();
Region selectionRegion = new Region(selectionPoint.x, selectionPoint.y - selectionPoint.x);
// Determine whether the region selected is the point attribute of
// and extension
if (fSourcePage == null) {
return;
}
// Retrieve the document range corresponding to the selection region
IDocumentRange element = fSourcePage.getRangeElement(selectionRegion.getOffset(), true);
// Validate the obtained document range
if (XMLUtil.withinRange(element, selectionRegion.getOffset()) == false) {
return;
}
// Ensure we have a document attribute
if ((element instanceof IDocumentAttributeNode) == false) {
return;
}
// Ignore IDocumentElementNode
// Ignore IDocumentTextNode
IDocumentAttributeNode documentAttribute = ((IDocumentAttributeNode) element);
String attributeValue = documentAttribute.getAttributeValue();
// Ensure the attribute value is defined
if ((attributeValue == null) || (attributeValue.length() == 0)) {
return;
}
// Get the parent node: either extension or extension point
IPluginObject node = XMLUtil.getTopLevelParent(documentAttribute);
// Ensure the node is defined and comes from and editable model
if ((node == null) || (node.getModel().isEditable() == false)) {
return;
}
// Ensure the node is an extension
if ((node instanceof IPluginExtension) == false) {
return;
}
// Ignore IPluginExtensionPoint
IPluginExtension extension = (IPluginExtension) node;
// Retrieve the corresponding schema attribute to this node
ISchemaAttribute schemaAttribute = XMLUtil.getSchemaAttribute(documentAttribute, extension.getPoint());
// Ensure the schema attribute is defined
if (schemaAttribute == null) {
return;
}
// Ensure the attribute is a point
if (((schemaAttribute.getParent() instanceof SchemaRootElement) == false) || (documentAttribute.getAttributeName().equals(IPluginExtension.P_POINT) == false)) {
return;
}
fSelection = new StructuredSelection(extension);
}
private void removeListeners() {
if (isInputInitialized() == false) {
return;
}
fStyledText.removeMouseListener(this);
fStyledText.removeKeyListener(this);
}
private boolean isInputInitialized() {
if ((fStyledText == null) || (fStyledText.isDisposed())) {
return false;
}
return true;
}
private void addListeners() {
if (isInputInitialized() == false) {
return;
}
fStyledText.addMouseListener(this);
fStyledText.addKeyListener(this);
}
/* (non-Javadoc)
* @see org.eclipse.swt.events.MouseListener#mouseDoubleClick(org.eclipse.swt.events.MouseEvent)
*/
public void mouseDoubleClick(MouseEvent e) {
// Ignore
}
/* (non-Javadoc)
* @see org.eclipse.swt.events.MouseListener#mouseDown(org.eclipse.swt.events.MouseEvent)
*/
public void mouseDown(MouseEvent e) {
// Ignore
}
public void mouseUp(MouseEvent e) {
checkIfOnTarget();
}
public void keyPressed(KeyEvent e) {
checkIfOnTarget();
}
/* (non-Javadoc)
* @see org.eclipse.swt.events.KeyListener#keyReleased(org.eclipse.swt.events.KeyEvent)
*/
public void keyReleased(KeyEvent e) {
// Ignore
}
}
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