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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 1.1 2004-09-02 18:28:03 jsurfer Exp $
  12  */
  13 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  14
  15
  16 import java.lang.reflect.InvocationTargetException;
  17 import java.util.Iterator;
  18
  19 import org.eclipse.core.runtime.IProgressMonitor;
  20 import org.eclipse.jface.operation.IRunnableWithProgress;
  21 import org.eclipse.jface.text.IDocument;
  22 import org.eclipse.jface.text.IRegion;
  23 import org.eclipse.jface.text.Position;
  24 import org.eclipse.jface.text.reconciler.DirtyRegion;
  25 import org.eclipse.jface.text.reconciler.IReconcileResult;
  26 import org.eclipse.jface.text.reconciler.IReconcileStep;
  27 import org.eclipse.jface.text.reconciler.IReconcilingStrategy;
  28 import org.eclipse.jface.text.reconciler.IReconcilingStrategyExtension;
  29 import org.eclipse.jface.text.source.Annotation;
  30 import org.eclipse.jface.text.source.IAnnotationModel;
  31 import org.eclipse.ui.IEditorInput;
  32 import org.eclipse.ui.actions.WorkspaceModifyOperation;
  33 import org.eclipse.ui.texteditor.ITextEditor;
  34
  35 import net.sourceforge.phpeclipse.ui.text.IReconcilingParticipant;
  36
  37 /**
  38  * Reconciling strategy for XML document. This class is responsible for keeping
  39  * the parsed model in sync with the text.
  40  */
  41 public class XMLReconcilingStrategy
  42         implements IReconcilingStrategy, IReconcilingStrategyExtension {
  43
  44         // Instance Variables ------------------------------------------------------
  45
  46         /**
  47          * The associated text editor.
  48          */
  49         private ITextEditor editor;
  50
  51         /**
  52          * A progress monitor that should be used for long-running operations.
  53          */
  54         IProgressMonitor progressMonitor;
  55
  56         /**
  57          * The first (and only) reconcile step is the parsing of the style sheet.
  58          */
  59         private IReconcileStep firstStep;
  60
  61         // Constructors ------------------------------------------------------------
  62
  63         public XMLReconcilingStrategy(ITextEditor editor) {
  64                 this.editor = editor;
  65                 firstStep = new XMLReconcileStep(editor);
  66         }
  67
  68         // IReconcilingStrategy Implementation -------------------------------------
  69
  70         /**
  71          * @see IReconcilingStrategy#reconcile(DirtyRegion, IRegion)
  72          */
  73         public void reconcile(DirtyRegion dirtyRegion, IRegion subRegion) {
  74                 removeTemporaryAnnotations();
  75                 process(firstStep.reconcile(dirtyRegion, subRegion));
  76         }
  77
  78         /**
  79          * @see IReconcilingStrategy#reconcile(IRegion)
  80          */
  81         public void reconcile(IRegion partition) {
  82                 removeTemporaryAnnotations();
  83                 process(firstStep.reconcile(partition));
  84         }
  85
  86         /**
  87          * @see IReconcilingStrategy#setDocument(IDocument)
  88          */
  89         public void setDocument(IDocument document) {
  90                 // FIXME
  91                 firstStep.setInputModel(null); //new DocumentAdapter(document);
  92         }
  93
  94         // IReconcilingStrategyExtension Implementation ----------------------------
  95
  96         /**
  97          * @see IReconcilingStrategyExtension#initialReconcile()
  98          */
  99         public void initialReconcile() {
 100                 process(firstStep.reconcile(null));
 101         }
 102
 103         /**
 104          * @see IReconcilingStrategyExtension#setProgressMonitor(IProgressMonitor)
 105          */
 106         public void setProgressMonitor(IProgressMonitor monitor) {
 107                 firstStep.setProgressMonitor(monitor);
 108                 progressMonitor = monitor;
 109         }
 110
 111         // Private Methods ---------------------------------------------------------
 112
 113         /**
 114          * Returns the annotation model for the editor input.
 115          *
 116          * @return the annotation model
 117          */
 118         IAnnotationModel getAnnotationModel()  {
 119                 IEditorInput input = editor.getEditorInput();
 120                 return editor.getDocumentProvider().getAnnotationModel(input);
 121         }
 122
 123         /**
 124          * Adds results of the reconcilation to the annotation model.
 125          */
 126         private void process(final IReconcileResult[] results) {
 127                 if (results == null) {
 128                         return;
 129                 }
 130
 131                 IRunnableWithProgress runnable = new WorkspaceModifyOperation() {
 132                         protected void execute(IProgressMonitor monitor) {
 133                                 for (int i = 0; i < results.length; i++) {
 134                                         if ((progressMonitor != null) &&
 135                                                 (progressMonitor.isCanceled()))
 136                                         {
 137                                                 return;
 138                                         }
 139
 140                                         if (results[i] instanceof AnnotationAdapter) {
 141                                                 AnnotationAdapter result = (AnnotationAdapter) results[i];
 142                                                 Position pos = result.getPosition();
 143                                                 Annotation annotation = result.createAnnotation();
 144                                                 getAnnotationModel().addAnnotation(annotation, pos);
 145                                         }
 146                                 }
 147                         }
 148                 };
 149
 150                 try {
 151                         runnable.run(null);
 152                 } catch (InvocationTargetException e) {
 153                         e.printStackTrace();
 154                 } catch (InterruptedException e) {
 155                         e.printStackTrace();
 156                 }
 157
 158                 if (editor instanceof IReconcilingParticipant) {
 159                         ((IReconcilingParticipant) editor).reconciled();
 160                 }
 161         }
 162
 163         /*
 164          * TODO A "real" implementation must be smarter, i.e. don't remove and add
 165          *      the annotations which are the same.
 166          */
 167         private void removeTemporaryAnnotations() {
 168                 Iterator i = getAnnotationModel().getAnnotationIterator();
 169                 while (i.hasNext())  {
 170                         Annotation annotation = (Annotation) i.next();
 171                         if (!annotation.isPersistent()) {
 172                                 getAnnotationModel().removeAnnotation(annotation);
 173                         }
 174                 }
 175         }
 176 }