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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: XMLReconcileStep.java,v 1.2 2006-10-21 23:14:13 pombredanne Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  15
  16 import java.util.ArrayList;
  17 import java.util.Collections;
  18 import java.util.List;
  19
  20 import net.sourceforge.phpeclipse.xml.core.model.IXMLDocument;
  21 import net.sourceforge.phpeclipse.xml.core.parser.IProblem;
  22 import net.sourceforge.phpeclipse.xml.core.parser.IProblemCollector;
  23 import net.sourceforge.phpeclipse.xml.ui.internal.editor.XMLDocumentProvider;
  24
  25 import org.eclipse.core.resources.IFile;
  26 import org.eclipse.jface.text.IRegion;
  27 import org.eclipse.jface.text.Position;
  28 import org.eclipse.jface.text.reconciler.AbstractReconcileStep;
  29 import org.eclipse.jface.text.reconciler.DirtyRegion;
  30 import org.eclipse.jface.text.reconciler.IReconcilableModel;
  31 import org.eclipse.jface.text.reconciler.IReconcileResult;
  32 import org.eclipse.jface.text.reconciler.IReconcileStep;
  33 import org.eclipse.jface.text.source.Annotation;
  34 import org.eclipse.ui.IEditorInput;
  35 import org.eclipse.ui.IFileEditorInput;
  36 import org.eclipse.ui.texteditor.IDocumentProvider;
  37 import org.eclipse.ui.texteditor.ITextEditor;
  38
  39 /**
  40  * Implementation of a reconcile step for building the XML parse tree on changes
  41  * to the editor content.
  42  */
  43 public class XMLReconcileStep extends AbstractReconcileStep {
  44
  45         // Inner Classes -----------------------------------------------------------
  46
  47         /**
  48          * Adapts an <code>IXMLDocument</code> to the
  49          * <code>IReconcilableModel</code> interface.
  50          */
  51         private class XMLDocumentAdapter implements IReconcilableModel {
  52                 private IXMLDocument document;
  53
  54                 public XMLDocumentAdapter(IXMLDocument document) {
  55                         this.document = document;
  56                 }
  57
  58                 public IXMLDocument getDocument() {
  59                         return document;
  60                 }
  61
  62         }
  63
  64         /**
  65          * Implementation of the problem collector interface for creating problem
  66          * annotations when there are problems parsing the style sheet.
  67          */
  68         private class ProblemCollector implements IProblemCollector {
  69                 /**
  70                  * The list of problems added to this collector.
  71                  */
  72                 private List collectedProblems = new ArrayList();
  73
  74                 /**
  75                  * @see IProblemCollector#addProblem(IProblem)
  76                  */
  77                 public void addProblem(IProblem problem) {
  78                         collectedProblems.add(problem);
  79                 }
  80
  81                 /**
  82                  * Returns the list of problems collected while the CSS source has been
  83                  * parsed, in the order they were reported. The list returned is
  84                  * immutable.
  85                  *
  86                  * @return the list of collected problems (of type {@link IProblem})
  87                  */
  88                 public List getProblems() {
  89                         return Collections.unmodifiableList(collectedProblems);
  90                 }
  91         }
  92
  93         /**
  94          * Adapter that adapts an {@link IProblem} to an {@link Annotation}.
  95          */
  96         private class ProblemAdapter extends AnnotationAdapter {
  97                 private IProblem problem;
  98
  99                 private Position position;
 100
 101                 public ProblemAdapter(IProblem problem) {
 102                         this.problem = problem;
 103                 }
 104
 105                 public Position getPosition() {
 106                         if (position == null) {
 107                                 position = createPositionFromProblem();
 108                         }
 109
 110                         return position;
 111                 }
 112
 113                 public Annotation createAnnotation() {
 114                         int start = problem.getSourceStart();
 115                         if (start < 0) {
 116                                 return null;
 117                         }
 118
 119                         int length = problem.getSourceEnd() - start + 1;
 120                         if (length < 0) {
 121                                 return null;
 122                         }
 123
 124                         String type;
 125                         if (problem.isWarning()) {
 126                                 type = XMLAnnotation.TYPE_ERROR;
 127                         } else if (problem.isError()) {
 128                                 type = XMLAnnotation.TYPE_WARNING;
 129                         } else {
 130                                 type = XMLAnnotation.TYPE_INFO;
 131                         }
 132
 133                         return new XMLAnnotation(type, false, problem.getMessage());
 134                 }
 135
 136                 private Position createPositionFromProblem() {
 137                         int start = problem.getSourceStart();
 138                         if (start < 0) {
 139                                 return null;
 140                         }
 141
 142                         int length = problem.getSourceEnd() - problem.getSourceStart() + 1;
 143                         if (length < 0) {
 144                                 return null;
 145                         }
 146
 147                         return new Position(start, length);
 148                 }
 149
 150         }
 151
 152         // Instance Variables ------------------------------------------------------
 153
 154         private ITextEditor editor;
 155
 156         private XMLDocumentAdapter xmlDocumentAdapter;
 157
 158         // Constructors ------------------------------------------------------------
 159
 160         /**
 161          * Default constructor.
 162          */
 163         public XMLReconcileStep(ITextEditor editor) {
 164                 this.editor = editor;
 165
 166                 xmlDocumentAdapter = new XMLDocumentAdapter(getXMLDocument());
 167         }
 168
 169         /**
 170          * Constructor.
 171          *
 172          * @param step
 173          *            the step to add to the pipe
 174          * @param editor
 175          *            the associated text editor
 176          */
 177         public XMLReconcileStep(IReconcileStep step, ITextEditor editor) {
 178                 super(step);
 179
 180                 this.editor = editor;
 181
 182                 xmlDocumentAdapter = new XMLDocumentAdapter(getXMLDocument());
 183         }
 184
 185         // AbstractReconcileStep Implementation ------------------------------------
 186
 187         /*
 188          * @see AbstractReconcileStep#reconcileModel(DirtyRegion, IRegion)
 189          */
 190         protected IReconcileResult[] reconcileModel(DirtyRegion dirtyRegion,
 191                         IRegion subRegion) {
 192                 IXMLDocument model = xmlDocumentAdapter.getDocument();
 193
 194                 IEditorInput editorInput = null;
 195                 IFile file = null;
 196                 if (editor != null) {
 197                         editorInput = editor.getEditorInput();
 198                 }
 199
 200                 if (editorInput instanceof IFileEditorInput)
 201                         file = ((IFileEditorInput) editorInput).getFile();
 202                 ProblemCollector problemCollector = new ProblemCollector();
 203                 model.reconcile(problemCollector, file);
 204
 205                 List problems = problemCollector.getProblems();
 206                 IReconcileResult[] retVal = new IReconcileResult[problems.size()];
 207                 for (int i = 0; i < problems.size(); i++) {
 208                         IProblem problem = (IProblem) problems.get(i);
 209                         retVal[i] = new ProblemAdapter(problem);
 210                 }
 211
 212                 return retVal;
 213         }
 214
 215         /*
 216          * @see AbstractReconcileStep#getModel()
 217          */
 218         public IReconcilableModel getModel() {
 219                 return xmlDocumentAdapter;
 220         }
 221
 222         // Private Methods Implementation ------------------------------------------
 223
 224         /**
 225          * Retrieve the style sheet associated with the editor input.
 226          */
 227         private IXMLDocument getXMLDocument() {
 228                 IDocumentProvider documentProvider = editor.getDocumentProvider();
 229                 if (documentProvider instanceof XMLDocumentProvider) {
 230                         XMLDocumentProvider xmlDocumentProvider = (XMLDocumentProvider) documentProvider;
 231                         return xmlDocumentProvider.getModel(editor.getEditorInput());
 232                 }
 233
 234                 return null;
 235         }
 236 }