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1
11 package org.eclipse.pde.internal.builders;
12
13 import java.io.*;
14 import java.util.*;
15
16 import javax.xml.parsers.*;
17
18 import org.eclipse.core.resources.*;
19 import org.eclipse.jface.text.*;
20 import org.eclipse.jface.text.Document;
21 import org.w3c.dom.*;
22 import org.xml.sax.*;
23
24
28 public class SchemaHandler extends PluginErrorReporter {
29
30 private org.w3c.dom.Document  fDocument;
31 private IDocument fTextDocument;
32 private FindReplaceDocumentAdapter fFindReplaceAdapter;
33 private Locator fLocator;
34 private Hashtable fLineTable;
35 private Element fRootElement;
36
37 private Stack fElementStack = new Stack();
38
39 public SchemaHandler(IFile file) {
40 super(file);
41 createTextDocument(file);
42 fLineTable = new Hashtable();
43 }
44
45 public void startElement(String uri, String localName, String qName, Attributes attributes)
46 throws SAXException {
47 Element element = fDocument.createElement(qName);
48 for (int i = 0; i < attributes.getLength(); i++) {
49 element.setAttribute(attributes.getQName(i), attributes.getValue(i));
50 }
51
52 Integer lineNumber = new Integer (fLocator.getLineNumber());
53 try {
54 lineNumber = getCorrectStartLine(qName);
55 } catch (BadLocationException e) {
56 }
57 Integer [] range = new Integer [] {lineNumber, new Integer (-1)};
58 fLineTable.put(element, range);
59 if (fRootElement == null)
60 fRootElement = element;
61 else
62 ((Element)fElementStack.peek()).appendChild(element);
63 fElementStack.push(element);
64 }
65
66 public void endElement(String arg0, String arg1, String arg2) throws SAXException {
67 Integer [] range = (Integer [])fLineTable.get(fElementStack.pop());
68 range[1] = new Integer (fLocator.getLineNumber());
69 }
70
71
74 public void setDocumentLocator(Locator locator) {
75 fLocator = locator;
76 }
77
78
81 public void startDocument() throws SAXException {
82 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
83 try {
84 fDocument = factory.newDocumentBuilder().newDocument();
85 } catch (ParserConfigurationException e) {
86 }
87 }
88
89
92 public void endDocument() throws SAXException {
93 fDocument.appendChild(fRootElement);
94 }
95
96
99 public void characters(char[] characters, int offset, int length) throws SAXException {
100 StringBuffer buff = new StringBuffer ();
101 for (int i = 0; i < length; i++) {
102 buff.append(characters[offset + i]);
103 }
104 Text text = fDocument.createTextNode(buff.toString());
105 if (fRootElement == null)
106 fDocument.appendChild(text);
107 else
108 ((Element)fElementStack.peek()).appendChild(text);
109 }
110
111 public Node getDocumentElement() {
112 if (fDocument != null) {
113 Element docElement = fDocument.getDocumentElement();
114 if (docElement != null) {
115 docElement.normalize();
116 return docElement;
117 }
118 }
119 return null;
120 }
121
122 public Hashtable getLineTable() {
123 return fLineTable;
124 }
125
126 private void createTextDocument(IFile file) {
127 try {
128 BufferedReader reader =
129 new BufferedReader(new FileReader(file.getLocation().toOSString()));
130 StringBuffer buffer = new StringBuffer ();
131 while (reader.ready()) {
132 String line = reader.readLine();
133 if (line != null) {
134 buffer.append(line);
135 buffer.append(System.getProperty("line.separator")); }
137 }
138 fTextDocument = new Document(buffer.toString());
139 fFindReplaceAdapter = new FindReplaceDocumentAdapter(fTextDocument);
140 reader.close();
141 } catch (FileNotFoundException e) {
142 } catch (IOException e) {
143 }
144 }
145
146 private Integer getCorrectStartLine(String elementName) throws BadLocationException{
147 int lineNumber = fLocator.getLineNumber();
148 int colNumber = fLocator.getColumnNumber();
149 if (colNumber < 0)
150 colNumber = getLastCharColumn(lineNumber);
151 int offset = fTextDocument.getLineOffset(lineNumber - 1) + colNumber - 1;
152 IRegion region = fFindReplaceAdapter.find(offset, "<" + elementName, false, false, false, false); return new Integer (fTextDocument.getLineOfOffset(region.getOffset()) + 1);
154 }
155
156 private int getLastCharColumn(int line) throws BadLocationException {
157 String lineDelimiter = fTextDocument.getLineDelimiter(line - 1);
158 int lineDelimiterLength = lineDelimiter != null ? lineDelimiter.length() : 0;
159 return fTextDocument.getLineLength(line - 1) - lineDelimiterLength;
160 }
161
162 }
163 |
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