+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2000, 2005 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 net.sourceforge.phpdt.internal.ui.viewsupport;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import org.eclipse.core.runtime.IProgressMonitor;
-import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.NullProgressMonitor;
-import org.eclipse.core.runtime.OperationCanceledException;
-import org.eclipse.core.runtime.Status;
-import org.eclipse.core.runtime.jobs.Job;
-import org.eclipse.jface.text.ITextSelection;
-//incastrix
-//import org.eclipse.jface.util.ListenerList;
-import org.eclipse.core.runtime.ListenerList;
-import org.eclipse.jface.viewers.IPostSelectionProvider;
-import org.eclipse.jface.viewers.ISelection;
-import org.eclipse.jface.viewers.ISelectionChangedListener;
-import org.eclipse.jface.viewers.ISelectionProvider;
-import org.eclipse.jface.viewers.SelectionChangedEvent;
-import org.eclipse.ui.texteditor.ITextEditor;
-
-/**
- * Infrastructure to share an AST for editor post selection listeners.
- */
-public class SelectionListenerWithASTManager {
-
- private static SelectionListenerWithASTManager fgDefault;
-
- /**
- * @return Returns the default manager instance.
- */
- public static SelectionListenerWithASTManager getDefault() {
- if (fgDefault == null) {
- fgDefault = new SelectionListenerWithASTManager();
- }
- return fgDefault;
- }
-
- private final static class PartListenerGroup {
- private ITextEditor fPart;
-
- private ISelectionChangedListener fSelectionListener,
- fPostSelectionListener;
-
- private Job fCurrentJob;
-
- private ListenerList fAstListeners;
-
- /**
- * Lock to avoid having more than one calculateAndInform job in
- * parallel. Only jobs may synchronize on this as otherwise deadlocks
- * are possible.
- */
- private final Object fJobLock = new Object();
-
- public PartListenerGroup(ITextEditor part) {
- fPart = part;
- fCurrentJob = null;
- fAstListeners = new ListenerList();
-
- fSelectionListener = new ISelectionChangedListener() {
- public void selectionChanged(SelectionChangedEvent event) {
- ISelection selection = event.getSelection();
- if (selection instanceof ITextSelection) {
- fireSelectionChanged((ITextSelection) selection);
- }
- }
- };
-
- fPostSelectionListener = new ISelectionChangedListener() {
- public void selectionChanged(SelectionChangedEvent event) {
- ISelection selection = event.getSelection();
- if (selection instanceof ITextSelection) {
- firePostSelectionChanged((ITextSelection) selection);
- }
- }
- };
- }
-
- public boolean isEmpty() {
- return fAstListeners.isEmpty();
- }
-
- public void install(ISelectionListenerWithAST listener) {
- if (isEmpty()) {
- ISelectionProvider selectionProvider = fPart
- .getSelectionProvider();
- if (selectionProvider instanceof IPostSelectionProvider) {
- ((IPostSelectionProvider) selectionProvider)
- .addPostSelectionChangedListener(fPostSelectionListener);
- selectionProvider
- .addSelectionChangedListener(fSelectionListener);
- }
- }
- fAstListeners.add(listener);
- }
-
- public void uninstall(ISelectionListenerWithAST listener) {
- fAstListeners.remove(listener);
- if (isEmpty()) {
- ISelectionProvider selectionProvider = fPart
- .getSelectionProvider();
- if (selectionProvider instanceof IPostSelectionProvider) {
- ((IPostSelectionProvider) selectionProvider)
- .removePostSelectionChangedListener(fPostSelectionListener);
- selectionProvider
- .removeSelectionChangedListener(fSelectionListener);
- }
- }
- }
-
- public void fireSelectionChanged(final ITextSelection selection) {
- if (fCurrentJob != null) {
- fCurrentJob.cancel();
- }
- }
-
- public void firePostSelectionChanged(final ITextSelection selection) {
- if (fCurrentJob != null) {
- fCurrentJob.cancel();
- }
-
- fCurrentJob = new Job("SelectionListenerWithASTManager Job") {// JavaUIMessages.SelectionListenerWithASTManager_job_title)
- // {
- public IStatus run(IProgressMonitor monitor) {
- if (monitor == null) {
- monitor = new NullProgressMonitor();
- }
- synchronized (fJobLock) {
- return calculateASTandInform(/*input,*/ selection, monitor);
- }
- }
- };
- fCurrentJob.setPriority(Job.DECORATE);
- fCurrentJob.setSystem(true);
- fCurrentJob.schedule();
- }
-
- protected IStatus calculateASTandInform(/*IJavaElement input,*/
- ITextSelection selection, IProgressMonitor monitor) {
- if (monitor.isCanceled()) {
- return Status.CANCEL_STATUS;
- }
- // create AST
- try {
- // CompilationUnit astRoot=
- // PHPeclipsePlugin.getDefault().getASTProvider().getAST(input,
- // ASTProvider.WAIT_ACTIVE_ONLY, monitor);
-
- // if (astRoot != null && !monitor.isCanceled()) {
- Object[] listeners;
- synchronized (PartListenerGroup.this) {
- listeners = fAstListeners.getListeners();
- }
- for (int i = 0; i < listeners.length; i++) {
- ((ISelectionListenerWithAST) listeners[i])
- .selectionChanged(fPart, selection);// , astRoot);
- if (monitor.isCanceled()) {
- return Status.CANCEL_STATUS;
- }
- }
- return Status.OK_STATUS;
- // }
- } catch (OperationCanceledException e) {
- // thrown when cancelling the AST creation
- }
- return Status.CANCEL_STATUS;
- }
- }
-
- private Map fListenerGroups;
-
- private SelectionListenerWithASTManager() {
- fListenerGroups = new HashMap();
- }
-
- /**
- * Registers a selection listener for the given editor part.
- *
- * @param part
- * The editor part to listen to.
- * @param listener
- * The listener to register.
- */
- public void addListener(ITextEditor part, ISelectionListenerWithAST listener) {
- synchronized (this) {
- PartListenerGroup partListener = (PartListenerGroup) fListenerGroups
- .get(part);
- if (partListener == null) {
- partListener = new PartListenerGroup(part);
- fListenerGroups.put(part, partListener);
- }
- partListener.install(listener);
- }
- }
-
- /**
- * Unregisters a selection listener.
- *
- * @param part
- * The editor part the listener was registered.
- * @param listener
- * The listener to unregister.
- */
- public void removeListener(ITextEditor part,
- ISelectionListenerWithAST listener) {
- synchronized (this) {
- PartListenerGroup partListener = (PartListenerGroup) fListenerGroups
- .get(part);
- if (partListener != null) {
- partListener.uninstall(listener);
- if (partListener.isEmpty()) {
- fListenerGroups.remove(part);
- }
- }
- }
- }
-
- /**
- * Forces a selection changed event that is sent to all listeners registered
- * to the given editor part. The event is sent from a background thread:
- * this method call can return before the listeners are informed.
- *
- * @param part
- * The editor part that has a changed selection
- * @param selection
- * The new text selection
- */
- public void forceSelectionChange(ITextEditor part, ITextSelection selection) {
- synchronized (this) {
- PartListenerGroup partListener = (PartListenerGroup) fListenerGroups
- .get(part);
- if (partListener != null) {
- partListener.firePostSelectionChanged(selection);
- }
- }
- }
-}
git://secure.phpeclipse.com / phpeclipse.git / blobdiff