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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: XMLDocumentProvider.java,v 1.3 2006-10-21 23:14:14 pombredanne Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.xml.ui.internal.editor;
  15
  16 import java.net.MalformedURLException;
  17
  18 import net.sourceforge.phpeclipse.xml.core.internal.model.XMLDocument;
  19 import net.sourceforge.phpeclipse.xml.core.model.IXMLDocument;
  20
  21 import org.eclipse.core.runtime.CoreException;
  22 import org.eclipse.jface.text.IDocument;
  23 import org.eclipse.jface.text.IDocumentListener;
  24 import org.eclipse.ui.editors.text.TextFileDocumentProvider;
  25
  26 /**
  27  * Document provider for XML files.
  28  *
  29  * TODO Merge the encoding detection support from I18NDocumentProvider and
  30  * AbstractDocumentProvider into this class
  31  *
  32  * TODO This class currently doubles as a model manager which will need to be
  33  * moved into core at some point, and would make this class pretty much useless
  34  */
  35 public class XMLDocumentProvider extends TextFileDocumentProvider {
  36
  37         // Inner Classes -----------------------------------------------------------
  38
  39         private class XMLFileInfo extends FileInfo {
  40                 IXMLDocument xmlDocument;
  41         }
  42
  43         // TestFileDocumentProvider Implementation ---------------------------------
  44
  45         /*
  46          * @see TextFileDocumentProvider#createEmptyFileInfo()
  47          */
  48         protected FileInfo createEmptyFileInfo() {
  49                 return new XMLFileInfo();
  50         }
  51
  52         /*
  53          * @see TextFileDocumentProvider#createFileInfo(Object)
  54          */
  55         protected FileInfo createFileInfo(Object element) throws CoreException {
  56                 FileInfo fileInfo = super.createFileInfo(element);
  57                 if (!(fileInfo instanceof XMLFileInfo)) {
  58                         return null;
  59                 }
  60
  61                 IDocument document = fileInfo.fTextFileBuffer.getDocument();
  62
  63                 String systemId = null;
  64                 try {
  65                         systemId = getSystemFile(fileInfo).toURL().toString();
  66                 } catch (MalformedURLException e) {
  67                 }
  68
  69                 IXMLDocument xmlDocument = createModel(document, systemId);
  70                 if (xmlDocument instanceof IDocumentListener) {
  71                         document.addDocumentListener((IDocumentListener) xmlDocument);
  72                 }
  73
  74                 XMLFileInfo xmlFileInfo = (XMLFileInfo) fileInfo;
  75                 xmlFileInfo.xmlDocument = xmlDocument;
  76
  77                 return xmlFileInfo;
  78         }
  79
  80         /*
  81          * @see TextFileDocumentProvider#disposeFileInfo(Object,
  82          *      TextFileDocumentProvider.FileInfo)
  83          */
  84         protected void disposeFileInfo(Object element, FileInfo info) {
  85                 if (info instanceof XMLFileInfo) {
  86                         IDocument document = getDocument(element);
  87                         if (document != null) {
  88                                 IXMLDocument xmlDocument = ((XMLFileInfo) info).xmlDocument;
  89                                 if (xmlDocument instanceof IDocumentListener) {
  90                                         document
  91                                                         .removeDocumentListener((IDocumentListener) xmlDocument);
  92                                 }
  93                         }
  94                 }
  95
  96                 super.disposeFileInfo(element, info);
  97         }
  98
  99         // Public Methods ----------------------------------------------------------
 100
 101         /**
 102          * Creates the XML document model object corresponding to the specified
 103          * document.
 104          *
 105          * @param document
 106          *            the document to parse
 107          * @param systemId
 108          *            the system ID of the document
 109          * @return the document model object
 110          */
 111         public IXMLDocument createModel(IDocument document, String systemId) {
 112                 return new XMLDocument(document, systemId);
 113         }
 114
 115         /**
 116          * Returns the XML document model associated with the specified element.
 117          *
 118          * @param element
 119          *            the element
 120          * @return the document model associated with the element
 121          */
 122         public IXMLDocument getModel(Object element) {
 123                 FileInfo info = getFileInfo(element);
 124                 if (info instanceof XMLFileInfo) {
 125                         XMLFileInfo xmlFileInfo = (XMLFileInfo) info;
 126                         return xmlFileInfo.xmlDocument;
 127                 }
 128
 129                 return null;
 130         }
 131 }