refactory: added UI removed from core plugin.
[phpeclipse.git] / net.sourceforge.phpeclipse.ui / src / net / sourceforge / phpdt / internal / ui / text / JavaReconciler.java
diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaReconciler.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaReconciler.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+
+package net.sourceforge.phpdt.internal.ui.text;
+
+import net.sourceforge.phpdt.core.ElementChangedEvent;
+import net.sourceforge.phpdt.core.IElementChangedListener;
+import net.sourceforge.phpdt.core.JavaCore;
+//import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+import net.sourceforge.phpeclipse.phpeditor.PHPUnitEditor;
+import net.sourceforge.phpeclipse.ui.WebUI;
+
+import org.eclipse.core.resources.IMarkerDelta;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.IResourceChangeEvent;
+import org.eclipse.core.resources.IResourceChangeListener;
+import org.eclipse.core.resources.IResourceDelta;
+import org.eclipse.core.resources.IWorkspace;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.reconciler.DirtyRegion;
+import org.eclipse.jface.text.reconciler.MonoReconciler;
+import org.eclipse.swt.events.ShellAdapter;
+import org.eclipse.swt.events.ShellEvent;
+import org.eclipse.swt.events.ShellListener;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.IFileEditorInput;
+import org.eclipse.ui.IPartListener;
+import org.eclipse.ui.IWorkbenchPart;
+import org.eclipse.ui.IWorkbenchPartSite;
+import org.eclipse.ui.IWorkbenchWindow;
+import org.eclipse.ui.texteditor.ITextEditor;
+
+/**
+ * A reconciler that is also activated on editor activation.
+ */
+public class JavaReconciler extends MonoReconciler {
+
+       /**
+        * Internal part listener for activating the reconciler.
+        */
+       private class PartListener implements IPartListener {
+
+               /*
+                * @see org.eclipse.ui.IPartListener#partActivated(org.eclipse.ui.IWorkbenchPart)
+                */
+               public void partActivated(IWorkbenchPart part) {
+                       if (part == fTextEditor && hasJavaModelChanged())
+                               JavaReconciler.this.forceReconciling();
+               }
+
+               /*
+                * @see org.eclipse.ui.IPartListener#partBroughtToTop(org.eclipse.ui.IWorkbenchPart)
+                */
+               public void partBroughtToTop(IWorkbenchPart part) {
+               }
+
+               /*
+                * @see org.eclipse.ui.IPartListener#partClosed(org.eclipse.ui.IWorkbenchPart)
+                */
+               public void partClosed(IWorkbenchPart part) {
+               }
+
+               /*
+                * @see org.eclipse.ui.IPartListener#partDeactivated(org.eclipse.ui.IWorkbenchPart)
+                */
+               public void partDeactivated(IWorkbenchPart part) {
+                       if (part == fTextEditor)
+                               setJavaModelChanged(false);
+               }
+
+               /*
+                * @see org.eclipse.ui.IPartListener#partOpened(org.eclipse.ui.IWorkbenchPart)
+                */
+               public void partOpened(IWorkbenchPart part) {
+               }
+       }
+
+       /**
+        * Internal Shell activation listener for activating the reconciler.
+        */
+       private class ActivationListener extends ShellAdapter {
+
+               private Control fControl;
+
+               public ActivationListener(Control control) {
+                       fControl = control;
+               }
+
+               /*
+                * @see org.eclipse.swt.events.ShellListener#shellActivated(org.eclipse.swt.events.ShellEvent)
+                */
+               public void shellActivated(ShellEvent e) {
+                       if (!fControl.isDisposed() && fControl.isVisible()
+                                       && hasJavaModelChanged())
+                               JavaReconciler.this.forceReconciling();
+               }
+
+               /*
+                * @see org.eclipse.swt.events.ShellListener#shellDeactivated(org.eclipse.swt.events.ShellEvent)
+                */
+               public void shellDeactivated(ShellEvent e) {
+                       setJavaModelChanged(false);
+               }
+       }
+
+       /**
+        * Internal Java element changed listener
+        * 
+        * @since 3.0
+        */
+       private class ElementChangedListener implements IElementChangedListener {
+               /*
+                * @see net.sourceforge.phpdt.core.IElementChangedListener#elementChanged(net.sourceforge.phpdt.core.ElementChangedEvent)
+                */
+               public void elementChanged(ElementChangedEvent event) {
+                       setJavaModelChanged(true);
+               }
+       }
+
+       /**
+        * Internal resource change listener.
+        * 
+        * @since 3.0
+        */
+       class ResourceChangeListener implements IResourceChangeListener {
+
+               private IResource getResource() {
+                       IEditorInput input = fTextEditor.getEditorInput();
+                       if (input instanceof IFileEditorInput) {
+                               IFileEditorInput fileInput = (IFileEditorInput) input;
+                               return fileInput.getFile();
+                       }
+                       return null;
+               }
+
+               /*
+                * @see IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
+                */
+               public void resourceChanged(IResourceChangeEvent e) {
+                       IResourceDelta delta = e.getDelta();
+                       IResource resource = getResource();
+                       if (delta != null && resource != null) {
+                               IResourceDelta child = delta.findMember(resource.getFullPath());
+                               if (child != null) {
+                                       IMarkerDelta[] deltas = child.getMarkerDeltas();
+                                       if (deltas.length > 0)
+                                               forceReconciling();
+                               }
+                       }
+               }
+       }
+
+       /** The reconciler's editor */
+       private ITextEditor fTextEditor;
+
+       /** The part listener */
+       private IPartListener fPartListener;
+
+       /** The shell listener */
+       private ShellListener fActivationListener;
+
+       /**
+        * The mutex that keeps us from running multiple reconcilers on one editor.
+        * TODO remove once we have ensured that there is only one reconciler per
+        * editor.
+        */
+       private Object fMutex;
+
+       /**
+        * The Java element changed listener.
+        * 
+        * @since 3.0
+        */
+       private IElementChangedListener fJavaElementChangedListener;
+
+       /**
+        * Tells whether the Java model sent out a changed event.
+        * 
+        * @since 3.0
+        */
+       private volatile boolean fHasJavaModelChanged = true;
+
+       /**
+        * The resource change listener.
+        * 
+        * @since 3.0
+        */
+       private IResourceChangeListener fResourceChangeListener;
+
+       private boolean fIninitalProcessDone = false;
+
+       /**
+        * Creates a new reconciler.
+        */
+       public JavaReconciler(ITextEditor editor,
+                       JavaCompositeReconcilingStrategy strategy, boolean isIncremental) {
+               super(strategy, isIncremental);
+               fTextEditor = editor;
+
+               // https://bugs.eclipse.org/bugs/show_bug.cgi?id=63898
+               // when re-using editors, a new reconciler is set up by the source
+               // viewer
+               // and the old one uninstalled. However, the old reconciler may still be
+               // running.
+               // To avoid having to reconcilers calling
+               // CompilationUnitEditor.reconciled,
+               // we synchronized on a lock object provided by the editor.
+               // The critical section is really the entire run() method of the
+               // reconciler
+               // thread, but synchronizing process() only will keep
+               // JavaReconcilingStrategy
+               // from running concurrently on the same editor.
+               // TODO remove once we have ensured that there is only one reconciler
+               // per editor.
+               if (editor instanceof PHPUnitEditor)
+                       fMutex = ((PHPUnitEditor) editor).getReconcilerLock();
+               else
+                       fMutex = new Object(); // Null Object
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.IReconciler#install(org.eclipse.jface.text.ITextViewer)
+        */
+       public void install(ITextViewer textViewer) {
+               super.install(textViewer);
+
+               fPartListener = new PartListener();
+               IWorkbenchPartSite site = fTextEditor.getSite();
+               IWorkbenchWindow window = site.getWorkbenchWindow();
+               window.getPartService().addPartListener(fPartListener);
+
+               fActivationListener = new ActivationListener(textViewer.getTextWidget());
+               Shell shell = window.getShell();
+               shell.addShellListener(fActivationListener);
+
+               fJavaElementChangedListener = new ElementChangedListener();
+               JavaCore.addElementChangedListener(fJavaElementChangedListener);
+
+               fResourceChangeListener = new ResourceChangeListener();
+               IWorkspace workspace = WebUI.getWorkspace();
+               workspace.addResourceChangeListener(fResourceChangeListener);
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.IReconciler#uninstall()
+        */
+       public void uninstall() {
+
+               IWorkbenchPartSite site = fTextEditor.getSite();
+               IWorkbenchWindow window = site.getWorkbenchWindow();
+               window.getPartService().removePartListener(fPartListener);
+               fPartListener = null;
+
+               Shell shell = window.getShell();
+               if (shell != null && !shell.isDisposed())
+                       shell.removeShellListener(fActivationListener);
+               fActivationListener = null;
+
+               JavaCore.removeElementChangedListener(fJavaElementChangedListener);
+               fJavaElementChangedListener = null;
+
+               IWorkspace workspace = WebUI.getWorkspace();
+               workspace.removeResourceChangeListener(fResourceChangeListener);
+               fResourceChangeListener = null;
+
+               super.uninstall();
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.AbstractReconciler#forceReconciling()
+        */
+       protected void forceReconciling() {
+               if (!fIninitalProcessDone)
+                       return;
+
+               super.forceReconciling();
+               JavaCompositeReconcilingStrategy strategy = (JavaCompositeReconcilingStrategy) getReconcilingStrategy(IDocument.DEFAULT_CONTENT_TYPE);
+               strategy.notifyListeners(false);
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.AbstractReconciler#aboutToReconcile()
+        * @since 3.0
+        */
+       protected void aboutToBeReconciled() {
+               JavaCompositeReconcilingStrategy strategy = (JavaCompositeReconcilingStrategy) getReconcilingStrategy(IDocument.DEFAULT_CONTENT_TYPE);
+               strategy.aboutToBeReconciled();
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.AbstractReconciler#reconcilerReset()
+        */
+       protected void reconcilerReset() {
+               super.reconcilerReset();
+               JavaCompositeReconcilingStrategy strategy = (JavaCompositeReconcilingStrategy) getReconcilingStrategy(IDocument.DEFAULT_CONTENT_TYPE);
+               strategy.notifyListeners(true);
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.MonoReconciler#initialProcess()
+        */
+       protected void initialProcess() {
+               // TODO remove once we have ensured that there is only one reconciler
+               // per editor.
+               synchronized (fMutex) {
+                       super.initialProcess();
+               }
+               fIninitalProcessDone = true;
+       }
+
+       /*
+        * @see org.eclipse.jface.text.reconciler.MonoReconciler#process(org.eclipse.jface.text.reconciler.DirtyRegion)
+        */
+       protected void process(DirtyRegion dirtyRegion) {
+               // TODO remove once we have ensured that there is only one reconciler
+               // per editor.
+               synchronized (fMutex) {
+                       super.process(dirtyRegion);
+               }
+       }
+
+       /**
+        * Tells whether the Java Model has changed or not.
+        * 
+        * @return <code>true</code> iff the Java Model has changed
+        * @since 3.0
+        */
+       private synchronized boolean hasJavaModelChanged() {
+               return fHasJavaModelChanged;
+       }
+
+       /**
+        * Sets whether the Java Model has changed or not.
+        * 
+        * @param state
+        *            <code>true</code> iff the java model has changed
+        * @since 3.0
+        */
+       private synchronized void setJavaModelChanged(boolean state) {
+               fHasJavaModelChanged = state;
+       }
+}
+// /**
+// * A reconciler that is also activated on editor activation.
+// */
+// public class JavaReconciler extends MonoReconciler {
+//     
+// /**
+// * Internal part listener for activating the reconciler.
+// */
+// class PartListener implements IPartListener {
+//             
+// /*
+// * @see IPartListener#partActivated(IWorkbenchPart)
+// */
+// public void partActivated(IWorkbenchPart part) {
+// if (part == fTextEditor)
+// JavaReconciler.this.forceReconciling();
+// }
+//
+// /*
+// * @see IPartListener#partBroughtToTop(IWorkbenchPart)
+// */
+// public void partBroughtToTop(IWorkbenchPart part) {
+// }
+//
+// /*
+// * @see IPartListener#partClosed(IWorkbenchPart)
+// */
+// public void partClosed(IWorkbenchPart part) {
+// }
+//
+// /*
+// * @see IPartListener#partDeactivated(IWorkbenchPart)
+// */
+// public void partDeactivated(IWorkbenchPart part) {
+// }
+//
+// /*
+// * @see IPartListener#partOpened(IWorkbenchPart)
+// */
+// public void partOpened(IWorkbenchPart part) {
+// }
+// };
+//     
+//     
+// /** The reconciler's editor */
+// private ITextEditor fTextEditor;
+// /** The part listener */
+// private IPartListener fPartListener;
+//     
+//     
+// /**
+// * Creates a new reconciler.
+// */
+// public JavaReconciler(ITextEditor editor, IReconcilingStrategy strategy,
+// boolean isIncremental) {
+// super(strategy, isIncremental);
+// fTextEditor= editor;
+// }
+//     
+// /*
+// * @see IReconciler#install(ITextViewer)
+// */
+// public void install(ITextViewer textViewer) {
+// super.install(textViewer);
+//             
+// fPartListener= new PartListener();
+// IWorkbenchPartSite site= fTextEditor.getSite();
+// IWorkbenchWindow window= site.getWorkbenchWindow();
+// window.getPartService().addPartListener(fPartListener);
+// }
+//
+// /*
+// * @see IReconciler#uninstall()
+// */
+// public void uninstall() {
+//             
+// IWorkbenchPartSite site= fTextEditor.getSite();
+// IWorkbenchWindow window= site.getWorkbenchWindow();
+// window.getPartService().removePartListener(fPartListener);
+// fPartListener= null;
+//             
+// super.uninstall();
+// }
+//     
+// /*
+// * @see AbstractReconciler#forceReconciling()
+// */
+// protected void forceReconciling() {
+// super.forceReconciling();
+// IReconcilingStrategy strategy=
+// getReconcilingStrategy(IDocument.DEFAULT_CONTENT_TYPE);
+// if (strategy instanceof JavaReconcilingStrategy) {
+// JavaReconcilingStrategy java= (JavaReconcilingStrategy) strategy;
+// java.notifyParticipants(false);
+// }
+// }
+//    
+// /*
+// * @see AbstractReconciler#reconcilerReset()
+// */
+// protected void reconcilerReset() {
+// super.reconcilerReset();
+// IReconcilingStrategy strategy=
+// getReconcilingStrategy(IDocument.DEFAULT_CONTENT_TYPE);
+// if (strategy instanceof JavaReconcilingStrategy) {
+// JavaReconcilingStrategy java= (JavaReconcilingStrategy) strategy;
+// java.notifyParticipants(true);
+// }
+// }
+// }