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   1 /*
   2  * Copyright (c) 2003-2004 Christopher Lenz and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     Christopher Lenz - initial API and implementation
  10  *
  11  * $Id: XMLReconcilingStrategy.java,v 1.3 2006-10-21 23:14:13 pombredanne Exp $
  12  */
  13 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  14
  15 import java.lang.reflect.InvocationTargetException;
  16 import java.util.Iterator;
  17
  18 import net.sourceforge.phpeclipse.ui.text.IReconcilingParticipant;
  19
  20 import org.eclipse.core.runtime.IProgressMonitor;
  21 import org.eclipse.jface.operation.IRunnableWithProgress;
  22 import org.eclipse.jface.text.IDocument;
  23 import org.eclipse.jface.text.IRegion;
  24 import org.eclipse.jface.text.Position;
  25 import org.eclipse.jface.text.reconciler.DirtyRegion;
  26 import org.eclipse.jface.text.reconciler.IReconcileResult;
  27 import org.eclipse.jface.text.reconciler.IReconcileStep;
  28 import org.eclipse.jface.text.reconciler.IReconcilingStrategy;
  29 import org.eclipse.jface.text.reconciler.IReconcilingStrategyExtension;
  30 import org.eclipse.jface.text.source.Annotation;
  31 import org.eclipse.jface.text.source.IAnnotationModel;
  32 import org.eclipse.ui.IEditorInput;
  33 import org.eclipse.ui.actions.WorkspaceModifyOperation;
  34 import org.eclipse.ui.texteditor.ITextEditor;
  35
  36 /**
  37  * Reconciling strategy for XML document. This class is responsible for keeping
  38  * the parsed model in sync with the text.
  39  */
  40 public class XMLReconcilingStrategy implements IReconcilingStrategy,
  41                 IReconcilingStrategyExtension {
  42
  43         // Instance Variables ------------------------------------------------------
  44
  45         /**
  46          * The associated text editor.
  47          */
  48         private ITextEditor editor;
  49
  50         /**
  51          * A progress monitor that should be used for long-running operations.
  52          */
  53         IProgressMonitor progressMonitor;
  54
  55         /**
  56          * The first (and only) reconcile step is the parsing of the style sheet.
  57          */
  58         private IReconcileStep firstStep;
  59
  60         // Constructors ------------------------------------------------------------
  61
  62         public XMLReconcilingStrategy(ITextEditor editor) {
  63                 this.editor = editor;
  64                 firstStep = new XMLReconcileStep(editor);
  65         }
  66
  67         // IReconcilingStrategy Implementation -------------------------------------
  68
  69         /**
  70          * @see IReconcilingStrategy#reconcile(DirtyRegion, IRegion)
  71          */
  72         public void reconcile(DirtyRegion dirtyRegion, IRegion subRegion) {
  73                 removeTemporaryAnnotations();
  74                 process(firstStep.reconcile(dirtyRegion, subRegion));
  75         }
  76
  77         /**
  78          * @see IReconcilingStrategy#reconcile(IRegion)
  79          */
  80         public void reconcile(IRegion partition) {
  81                 removeTemporaryAnnotations();
  82                 process(firstStep.reconcile(partition));
  83         }
  84
  85         /**
  86          * @see IReconcilingStrategy#setDocument(IDocument)
  87          */
  88         public void setDocument(IDocument document) {
  89                 // FIXME
  90                 firstStep.setInputModel(null); // new DocumentAdapter(document);
  91         }
  92
  93         // IReconcilingStrategyExtension Implementation ----------------------------
  94
  95         /**
  96          * @see IReconcilingStrategyExtension#initialReconcile()
  97          */
  98         public void initialReconcile() {
  99                 process(firstStep.reconcile(null));
 100         }
 101
 102         /**
 103          * @see IReconcilingStrategyExtension#setProgressMonitor(IProgressMonitor)
 104          */
 105         public void setProgressMonitor(IProgressMonitor monitor) {
 106                 firstStep.setProgressMonitor(monitor);
 107                 progressMonitor = monitor;
 108         }
 109
 110         // Private Methods ---------------------------------------------------------
 111
 112         /**
 113          * Returns the annotation model for the editor input.
 114          *
 115          * @return the annotation model
 116          */
 117         IAnnotationModel getAnnotationModel() {
 118                 IEditorInput input = editor.getEditorInput();
 119                 return editor.getDocumentProvider().getAnnotationModel(input);
 120         }
 121
 122         /**
 123          * Adds results of the reconcilation to the annotation model.
 124          */
 125         private void process(final IReconcileResult[] results) {
 126                 if (results == null) {
 127                         return;
 128                 }
 129
 130                 IRunnableWithProgress runnable = new WorkspaceModifyOperation() {
 131                         protected void execute(IProgressMonitor monitor) {
 132                                 for (int i = 0; i < results.length; i++) {
 133                                         if ((progressMonitor != null)
 134                                                         && (progressMonitor.isCanceled())) {
 135                                                 return;
 136                                         }
 137
 138                                         if (results[i] instanceof AnnotationAdapter) {
 139                                                 AnnotationAdapter result = (AnnotationAdapter) results[i];
 140                                                 Position pos = result.getPosition();
 141                                                 Annotation annotation = result.createAnnotation();
 142                                                 getAnnotationModel().addAnnotation(annotation, pos);
 143                                         }
 144                                 }
 145                         }
 146                 };
 147
 148                 try {
 149                         runnable.run(null);
 150                 } catch (InvocationTargetException e) {
 151                         e.printStackTrace();
 152                 } catch (InterruptedException e) {
 153                         e.printStackTrace();
 154                 }
 155
 156                 if (editor instanceof IReconcilingParticipant) {
 157                         ((IReconcilingParticipant) editor).reconciled();
 158                 }
 159         }
 160
 161         /*
 162          * TODO A "real" implementation must be smarter, i.e. don't remove and add
 163          * the annotations which are the same.
 164          */
 165         private void removeTemporaryAnnotations() {
 166                 Iterator i = getAnnotationModel().getAnnotationIterator();
 167                 while (i.hasNext()) {
 168                         Annotation annotation = (Annotation) i.next();
 169                         if (!annotation.isPersistent()) {
 170                                 getAnnotationModel().removeAnnotation(annotation);
 171                         }
 172                 }
 173         }
 174 }