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1
11 package org.eclipse.pde.internal.ui.model;
12
13 import java.util.*;
14
15 import org.eclipse.jface.text.*;
16 import org.xml.sax.*;
17 import org.xml.sax.helpers.*;
18
19 public abstract class DocumentHandler extends DefaultHandler {
20
21 protected FindReplaceDocumentAdapter fFindReplaceAdapter;
22 protected Stack fDocumentNodeStack = new Stack();
23 protected int fHighestOffset = 0;
24 private Locator fLocator;
25
26 public DocumentHandler() {
27 }
28
29
32 public void startDocument() throws SAXException {
33 fDocumentNodeStack.clear();
34 fHighestOffset = 0;
35 fFindReplaceAdapter = new FindReplaceDocumentAdapter(getDocument());
36 }
37
38
41 public void startElement(String  uri, String localName, String qName,
42 Attributes attributes) throws SAXException {
43 IDocumentNode parent = fDocumentNodeStack.isEmpty() ? null : (IDocumentNode)fDocumentNodeStack.peek();
44 IDocumentNode node = getDocumentNode(qName, parent);
45 node.setXMLTagName(qName);
46 try {
47 int nodeOffset = getStartOffset(qName);
48 node.setOffset(nodeOffset);
49 IDocument doc = getDocument();
50 int line = doc.getLineOfOffset(nodeOffset);
51 node.setLineIndent(node.getOffset() - doc.getLineOffset(line));
52 for (int i = 0; i < attributes.getLength(); i++) {
54 String attName = attributes.getQName(i);
55 String attValue = attributes.getValue(i);
56 IDocumentAttribute attribute = getDocumentAttribute(attName, attValue, node);
57 if (attribute != null) {
58 IRegion region = getAttributeRegion(attName, attValue, nodeOffset);
59 if (region != null) {
60 attribute.setNameOffset(region.getOffset());
61 attribute.setNameLength(attName.length());
62 attribute.setValueOffset(region.getOffset() + region.getLength() - 1 - attValue.length());
63 attribute.setValueLength(attValue.length());
64 }
65 node.setXMLAttribute(attribute);
66 }
67 }
68 } catch (BadLocationException e) {
69 }
70 appendChildToParent(parent, node);
71 fDocumentNodeStack.push(node);
72 }
73
74 protected void appendChildToParent(IDocumentNode parent, IDocumentNode child) {
75 if (parent != null && child != null) {
76 parent.addChildNode(child);
77 }
78 }
79
80 protected abstract IDocumentNode getDocumentNode(String name, IDocumentNode parent);
81
82 protected abstract IDocumentAttribute getDocumentAttribute(String name, String value, IDocumentNode parent);
83
84 private int getStartOffset(String elementName) throws BadLocationException {
85 int line = fLocator.getLineNumber();
86 int col = fLocator.getColumnNumber();
87 IDocument doc = getDocument();
88 if (col < 0)
89 col = doc.getLineLength(line);
90 String text = doc.get(fHighestOffset + 1, doc.getLineOffset(line) - fHighestOffset - 1);
91
92 ArrayList commentPositions = new ArrayList();
93 for (int idx = 0; idx < text.length();) {
94 idx = text.indexOf("<!--", idx); if (idx == -1)
96 break;
97 int end = text.indexOf("-->", idx); if (end == -1)
99 break;
100
101 commentPositions.add(new Position(idx, end - idx));
102 idx = end + 1;
103 }
104
105 int idx = 0;
106 for (; idx < text.length(); idx += 1) {
107 idx = text.indexOf("<" + elementName, idx); if (idx == -1)
109 break;
110 boolean valid = true;
111 for (int i = 0; i < commentPositions.size(); i++) {
112 Position pos = (Position)commentPositions.get(i);
113 if (pos.includes(idx)) {
114 valid = false;
115 break;
116 }
117 }
118 if (valid)
119 break;
120 }
121 if (idx > -1)
122 fHighestOffset += idx + 1;
123 return fHighestOffset;
124 }
125
126 private int getElementLength(IDocumentNode node, int line, int column) throws BadLocationException {
127 int endIndex = node.getOffset();
128 IDocument doc = getDocument();
129 int start = Math.max(doc.getLineOffset(line), node.getOffset());
130 column = doc.getLineLength(line);
131 String lineText= doc.get(start, column - start + doc.getLineOffset(line));
132
133 int index = lineText.indexOf("</" + node.getXMLTagName() + ">"); if (index == -1) {
135 index= lineText.indexOf("/>"); if (index == -1 ) {
137 endIndex = column;
138 } else {
139 endIndex = index + 2;
140 }
141 } else{
142 endIndex = index + node.getXMLTagName().length() + 3;
143 }
144 return start + endIndex - node.getOffset();
145 }
146
147 private IRegion getAttributeRegion(String name, String value, int offset) throws BadLocationException{
148 IRegion nameRegion = fFindReplaceAdapter.find(offset, name+"\\s*=\\s*\"", true, false, false, true); if (nameRegion != null) {
150 if (getDocument().get(nameRegion.getOffset() + nameRegion.getLength(), value.length()).equals(value))
151 return new Region(nameRegion.getOffset(), nameRegion.getLength() + value.length() + 1);
152 }
153 return null;
154 }
155
156
157
160 public void endElement(String uri, String localName, String qName)
161 throws SAXException {
162 IDocumentNode node = (IDocumentNode)fDocumentNodeStack.pop();
163 try {
164 node.setLength(getElementLength(node, fLocator.getLineNumber() - 1, fLocator.getColumnNumber()));
165 setTextNodeOffset(node);
166 } catch (BadLocationException e) {
167 }
168 }
169
170 protected void setTextNodeOffset(IDocumentNode node) throws BadLocationException {
171 IDocumentTextNode textNode = node.getTextNode();
172 if (textNode != null && textNode.getText() != null) {
173 if (textNode.getText().trim().length() == 0) {
174 node.removeTextNode();
175 return;
176 }
177 IDocument doc = getDocument();
178 String text = doc.get(node.getOffset(), node.getLength());
179 textNode.setOffset(node.getOffset() + text.indexOf(textNode.getText()));
180 text = doc.get(textNode.getOffset(), node.getLength() - textNode.getOffset() + node.getOffset());
181 int index = text.indexOf('<');
182 for (index -= 1; index >= 0; index--) {
183 if (!Character.isWhitespace(text.charAt(index))) {
184 index += 1;
185 break;
186 }
187 }
188 textNode.setLength(index);
189 textNode.setText(doc.get(textNode.getOffset(), index));
190 }
191 }
192
193
196 public void fatalError(SAXParseException e) throws SAXException {
197 generateErrorElementHierarchy();
198 }
199
200
203 private void generateErrorElementHierarchy() {
204 while (!fDocumentNodeStack.isEmpty()) {
205 ((IDocumentNode)fDocumentNodeStack.pop()).setIsErrorNode(true);
206 }
207 }
208
209
212 public void error(SAXParseException e) throws SAXException {
213 generateErrorElementHierarchy();
214 }
215
216
219 public void setDocumentLocator(Locator locator) {
220 fLocator = locator;
221 }
222
223 protected abstract IDocument getDocument();
224 }
225 |
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