net.sourceforge.phpeclipse.xml.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/XMLReconcileStep.java

   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 1.1 2004-09-02 18:28:03 jsurfer 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                 private Position position;
  99
 100                 public ProblemAdapter(IProblem problem)  {
 101                         this.problem = problem;
 102                 }
 103
 104                 public Position getPosition()  {
 105                         if (position == null) {
 106                                 position = createPositionFromProblem();
 107                         }
 108
 109                         return position;
 110                 }
 111
 112                 public Annotation createAnnotation() {
 113                         int start = problem.getSourceStart();
 114                         if (start < 0) {
 115                                 return null;
 116                         }
 117
 118                         int length = problem.getSourceEnd() - start + 1;
 119                         if (length < 0) {
 120                                 return null;
 121                         }
 122
 123                         String type;
 124                         if (problem.isWarning()) {
 125                                 type = XMLAnnotation.TYPE_ERROR;
 126                         } else if (problem.isError()) {
 127                                 type = XMLAnnotation.TYPE_WARNING;
 128                         } else {
 129                                 type = XMLAnnotation.TYPE_INFO;
 130                         }
 131
 132                         return new XMLAnnotation(type, false, problem.getMessage());
 133                 }
 134
 135                 private Position createPositionFromProblem() {
 136                         int start = problem.getSourceStart();
 137                         if (start < 0) {
 138                                 return null;
 139                         }
 140
 141                         int length = problem.getSourceEnd() - problem.getSourceStart() + 1;
 142                         if (length < 0) {
 143                                 return null;
 144                         }
 145
 146                         return new Position(start, length);
 147                 }
 148
 149         }
 150
 151         // Instance Variables ------------------------------------------------------
 152
 153         private ITextEditor editor;
 154
 155         private XMLDocumentAdapter xmlDocumentAdapter;
 156
 157         // Constructors ------------------------------------------------------------
 158
 159         /**
 160          * Default constructor.
 161          */
 162         public XMLReconcileStep(ITextEditor editor) {
 163                 this.editor = editor;
 164
 165                 xmlDocumentAdapter = new XMLDocumentAdapter(getXMLDocument());
 166         }
 167
 168         /**
 169          * Constructor.
 170          *
 171          * @param step the step to add to the pipe
 172          * @param editor the associated text editor
 173          */
 174         public XMLReconcileStep(IReconcileStep step, ITextEditor editor) {
 175                 super(step);
 176
 177                 this.editor = editor;
 178
 179                 xmlDocumentAdapter = new XMLDocumentAdapter(getXMLDocument());
 180         }
 181
 182         // AbstractReconcileStep Implementation ------------------------------------
 183
 184         /*
 185          * @see AbstractReconcileStep#reconcileModel(DirtyRegion, IRegion)
 186          */
 187         protected IReconcileResult[] reconcileModel(
 188                 DirtyRegion dirtyRegion, IRegion subRegion
 189         ) {
 190                 IXMLDocument model = xmlDocumentAdapter.getDocument();
 191
 192
 193                 IEditorInput editorInput = null;
 194                 IFile file = null;
 195             if (editor != null) {
 196               editorInput = editor.getEditorInput();
 197             }
 198
 199             if (editorInput instanceof IFileEditorInput)
 200               file = ((IFileEditorInput) editorInput).getFile();
 201             ProblemCollector problemCollector = new ProblemCollector();
 202                 model.reconcile(problemCollector, file);
 203
 204                 List problems = problemCollector.getProblems();
 205                 IReconcileResult[] retVal = new IReconcileResult[problems.size()];
 206                 for (int i = 0; i < problems.size(); i++) {
 207                         IProblem problem = (IProblem) problems.get(i);
 208                         retVal[i] = new ProblemAdapter(problem);
 209                 }
 210
 211                 return retVal;
 212         }
 213
 214         /*
 215          * @see AbstractReconcileStep#getModel()
 216          */
 217         public IReconcilableModel getModel() {
 218                 return xmlDocumentAdapter;
 219         }
 220
 221         // Private Methods Implementation ------------------------------------------
 222
 223         /**
 224          * Retrieve the style sheet associated with the editor input.
 225          */
 226         private IXMLDocument getXMLDocument() {
 227                 IDocumentProvider documentProvider = editor.getDocumentProvider();
 228                 if (documentProvider instanceof XMLDocumentProvider) {
 229                         XMLDocumentProvider xmlDocumentProvider =
 230                                         (XMLDocumentProvider) documentProvider;
 231                         return xmlDocumentProvider.getModel(editor.getEditorInput());
 232                 }
 233
 234                 return null;
 235         }
 236 }