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1 /*

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: CssStructureCreator.java,v 1.1 2004-09-02 18:11:49 jsurfer Exp $

12 */

13

14 package net.sourceforge.phpeclipse.css.ui.internal.compare;

15

16 import java.io.IOException;

17 import java.io.InputStream;

18 import java.io.InputStreamReader;

19 import java.util.HashMap;

20 import java.util.Map;

21

22 import net.sourceforge.phpeclipse.core.model.ISourceReference;

23 import net.sourceforge.phpeclipse.css.core.internal.parser.DefaultCssParser;

24 import net.sourceforge.phpeclipse.css.core.internal.text.CssTextUtils;

25 import net.sourceforge.phpeclipse.css.core.model.IAtRule;

26 import net.sourceforge.phpeclipse.css.core.model.IDeclaration;

27 import net.sourceforge.phpeclipse.css.core.model.IRule;

28 import net.sourceforge.phpeclipse.css.core.model.IStyleRule;

29 import net.sourceforge.phpeclipse.css.core.parser.ICssParser;

30 import net.sourceforge.phpeclipse.css.core.parser.LexicalErrorException;

31 import net.sourceforge.phpeclipse.css.core.parser.SyntaxErrorException;

32 import net.sourceforge.phpeclipse.css.ui.CssUI;

33 import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;

34 import net.sourceforge.phpeclipse.css.ui.text.CssTextTools;

35

36 import org.eclipse.compare.IStreamContentAccessor;

37 import org.eclipse.compare.internal.DocumentManager;

38 import org.eclipse.compare.structuremergeviewer.IStructureComparator;

39 import org.eclipse.compare.structuremergeviewer.IStructureCreator;

40 import org.eclipse.core.runtime.CoreException;

41 import org.eclipse.jface.text.Document;

42 import org.eclipse.jface.text.IDocument;

43 import org.eclipse.jface.text.IRegion;

44

45 /**

46 * TODO Check why the root node is not being displayed

47 */

48 public class CssStructureCreator implements IStructureCreator {

49

50 // IStructureCreator Implementation ----------------------------------------

51

52 /*

53 * @see IStructureCreator#getName()

54 */

55 public String getName() {

56 return CssUIMessages.getString(

57 "CssStructureViewer.title"); //$NON-NLS-1$

58 }

59

60 /*

61 * @see IStructureCreator#getStructure(Object)

62 */

63 public IStructureComparator getStructure(final Object input) {

64 IDocument doc = DocumentManager.get(input);

65 if (doc == null) {

66 if (input instanceof IStreamContentAccessor) {

67 doc = createDocument((IStreamContentAccessor) input);

68 }

69 }

70 if (doc != null) {

71 CssNode node = new CssNode(doc);

72 ICssParser parser = new DefaultCssParser();

73 parser.setSource(doc);

74 try {

75 IRule[] rules = parser.parseRules(null);

76 for (int i = 0; i < rules.length; i++) {

77 node.addChild(createNode(node, rules[i], new HashMap()));

78 }

79 } catch (LexicalErrorException e) {

80 // just return null

81 } catch (SyntaxErrorException e) {

82 // just return null

83 }

84 return node;

85 }

86 return null;

87 }

88

89 /*

90 * @see IStructureCreator#locate(Object, Object)

91 */

92 public IStructureComparator locate(Object path, Object input) {

93 // TODO Find out what locate() is about and implement the functionality

94 return null;

95 }

96

97 /*

98 * @see IStructureCreator#getContents(Object, boolean)

99 */

100 public String getContents(Object node, boolean ignoreWhitespace) {

101 if (node instanceof CssNode) {

102 CssNode cssNode = (CssNode) node;

103 int ch;

104 InputStream in = null;

105 try {

106 StringBuffer buf = new StringBuffer();

107 in = cssNode.getContents();

108 while ((ch = in.read()) != -1) {

109 if (!ignoreWhitespace

110 || !CssTextUtils.isCssWhitespace((char) ch)) {

111 buf.append((char) ch);

112 }

113 }

114 return buf.toString();

115 } catch (IOException e) {

116 // just return an empty string

117 } finally {

118 if (in != null) {

119 try {

120 in.close();

121 } catch (IOException e1) {

122 // ignore

123 }

124 }

125 }

126 }

127 return ""; //$NON-NLS-1$

128 }

129

130 /*

131 * @see IStructureCreator#save(IStructureComparator, Object)

132 */

133 public void save(IStructureComparator node, Object input) {

134 // TODO Find out what save() is about and implement the functionality

135 }

136

137 // Private Methods ---------------------------------------------------------

138

139 private IDocument createDocument(IStreamContentAccessor content) {

140 IDocument document = null;

141 InputStreamReader in = null;

142 try {

143 in = new InputStreamReader(content.getContents());

144 StringBuffer buf = new StringBuffer();

145 int ch;

146 while ((ch = in.read()) != -1) {

147 buf.append((char) ch);

148 }

149 document = new Document(buf.toString());

150 DocumentManager.put(content, document);

151 CssTextTools tools = CssUI.getDefault().getTextTools();

152 tools.setupDocument(document);

153 } catch (CoreException e) {

154 CssUI.log(e);

155 } catch (IOException e) {

156 CssUI.log(e);

157 } finally {

158 if (in != null) {

159 try {

160 in.close();

161 } catch (IOException e) {

162 // ignore

163 }

164 }

165 }

166 return document;

167 }

168

169 private CssNode createNode(CssNode parent, IRule rule, Map names) {

170 int typeCode = -1;

171 String name = ""; //$NON-NLS-1$

172 if (rule instanceof IAtRule) {

173 IAtRule atRule = (IAtRule) rule;

174 typeCode = CssNode.AT_RULE;

175 ISourceReference atKeyword = atRule.getName();

176 if (atKeyword != null) {

177 name = atKeyword.getSource();

178 }

179 } else if (rule instanceof IStyleRule) {

180 IStyleRule styleRule = (IStyleRule) rule;

181 typeCode = CssNode.STYLE_RULE;

182 ISourceReference selector = styleRule.getSelector();

183 if (selector != null) {

184 name = selector.getSource();

185 }

186 }

187 String id = name;

188 if (names.containsKey(name)) {

189 Integer count = (Integer) names.get(name);

190 id += count.toString();

191 names.put(name, new Integer(count.intValue() + 1));

192 } else {

193 names.put(name, new Integer(0));

194 }

195 IRegion region = rule.getSourceRegion();

196 CssNode node = new CssNode(parent, typeCode, id, name,

197 region.getOffset(), region.getLength());

198 IRule[] children = rule.getChildren();

199 if (children.length > 0) {

200 Map ruleNames = new HashMap();

201 for (int i = 0; i < children.length; i++) {

202 node.addChild(createNode(node, children[i], ruleNames));

203 }

204 }

205 IDeclaration[] properties = rule.getDeclarations();

206 if (properties.length > 0) {

207 Map propertyNames = new HashMap();

208 for (int i = 0; i < properties.length; i++) {

209 node.addChild(createNode(node, properties[i], propertyNames));

210 }

211 }

212 return node;

213 }

214

215 private CssNode createNode(CssNode parent, IDeclaration declaration,

216 Map names) {

217 String name = ""; //$NON-NLS-1$

218 ISourceReference property = declaration.getProperty();

219 if (property != null) {

220 name = property.getSource();

221 }

222 String id = name;

223 if (names.containsKey(name)) {

224 Integer count = (Integer) names.get(name);

225 id += count.toString();

226 names.put(name, new Integer(count.intValue() + 1));

227 } else {

228 names.put(name, new Integer(0));

229 }

230 IRegion region = declaration.getSourceRegion();

231 return new CssNode(parent, CssNode.DECLARATION, id, name,

232 region.getOffset(), region.getLength());

233 }

234

235 }