001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
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016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
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019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
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022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
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030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
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036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
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040: */
041:
042: package org.netbeans.modules.editor.html;
043:
044: import java.io.*;
045: import java.util.*;
046: import org.netbeans.editor.ext.html.dtd.ReaderProvider;
047: import org.netbeans.editor.ext.html.dtd.Registry;
048: import org.openide.filesystems.*;
049:
050: public class NbReaderProvider implements ReaderProvider {
051:
052: private static final String DTD_FOLDER = "DTDs"; // NOI18 // NOI18N
053: private static final String CATALOG_FILE_NAME = "catalog"; // NOI18N
054:
055: Map mapping = null;
056: boolean valid = false;
057: FileObject dtdSetFolder;
058:
059: public static void setupReaders() {
060: FileObject rootFolder = Repository.getDefault()
061: .getDefaultFileSystem().getRoot();
062: rootFolder.addFileChangeListener(new RootFolderListener());
063:
064: FileObject dtdFolder = rootFolder.getFileObject(DTD_FOLDER);
065: if (dtdFolder != null) {
066: dtdFolder.addFileChangeListener(new DTDFolderListener());
067: processSubfolders(dtdFolder);
068: }
069: }
070:
071: public NbReaderProvider(FileObject folder) {
072: dtdSetFolder = folder;
073: revalidate(true);
074: folder.addFileChangeListener(new ProviderFolderListener());
075: }
076:
077: public Collection getIdentifiers() {
078: return valid ? mapping.keySet() : new HashSet(0);
079: }
080:
081: public Reader getReaderForIdentifier(String identifier,
082: String filename) {
083: if (!valid)
084: return null;
085:
086: String fileName = (String) mapping.get(identifier);
087: if (fileName == null)
088: return null;
089: if (dtdSetFolder == null)
090: return null;
091:
092: FileObject file = dtdSetFolder.getFileObject(fileName);
093: if (fileName == null)
094: return null;
095:
096: try {
097: return new InputStreamReader(file.getInputStream());
098: } catch (FileNotFoundException exc) {
099: return null;
100: }
101: }
102:
103: private void invalidate() {
104: if (valid) {
105: valid = false;
106: Registry.invalidateReaderProvider(this );
107: }
108: }
109:
110: private boolean revalidate(boolean flag) {
111: if (mapping == null || flag) {
112: FileObject catalog = dtdSetFolder
113: .getFileObject(CATALOG_FILE_NAME);
114:
115: if (catalog == null) {
116: mapping = null;
117: } else
118: try {
119: mapping = parseCatalog(new InputStreamReader(
120: catalog.getInputStream()));
121: } catch (FileNotFoundException exc) {
122: mapping = null;
123: }
124:
125: if (mapping == null) {
126: invalidate();
127: return false;
128: }
129: }
130:
131: // check the availabilily
132: Collection files = mapping.values();
133: boolean all = true;
134: for (Iterator it = files.iterator(); it.hasNext();) {
135: String fname = (String) it.next();
136: if (dtdSetFolder.getFileObject(fname) == null) {
137: all = false;
138: break;
139: }
140: }
141: if (!all)
142: invalidate();
143: valid = all;
144: return valid;
145: }
146:
147: private Map parseCatalog(Reader catalogReader) {
148: HashMap hashmap = new HashMap();
149: LineNumberReader reader = new LineNumberReader(catalogReader);
150:
151: for (;;) {
152: String line;
153:
154: try {
155: line = reader.readLine();
156: } catch (IOException exc) {
157: return null;
158: }
159:
160: if (line == null)
161: break;
162:
163: StringTokenizer st = new StringTokenizer(line);
164: if (st.hasMoreTokens() && "PUBLIC".equals(st.nextToken())
165: && st.hasMoreTokens()) { // NOI18N
166: st.nextToken("\""); // NOI18N
167: if (!st.hasMoreTokens())
168: continue;
169: String id = st.nextToken("\""); // NOI18N
170:
171: if (!st.hasMoreTokens())
172: continue;
173: st.nextToken(" \t\n\r\f"); // NOI18N
174:
175: if (!st.hasMoreTokens())
176: continue;
177: String file = st.nextToken();
178: hashmap.put(id, file);
179: }
180: }
181: return hashmap;
182: }
183:
184: private static void processSubfolders(FileObject dtdFolder) {
185: FileObject folder;
186: for (Enumeration en = dtdFolder.getFolders(false); en
187: .hasMoreElements();) {
188: folder = (FileObject) en.nextElement();
189: addFolder(folder);
190: }
191: }
192:
193: static Map folder2provider = new HashMap();
194:
195: private static void removeSubfolders() {
196: Iterator it = folder2provider.entrySet().iterator();
197: folder2provider = new HashMap();
198: while (it.hasNext()) {
199: Map.Entry entry = (Map.Entry) it.next();
200: ReaderProvider prov = (ReaderProvider) entry.getValue();
201: Registry.unregisterReaderProvider(prov);
202: }
203: }
204:
205: private static void addFolder(FileObject folder) {
206: NbReaderProvider prov = new NbReaderProvider(folder);
207: folder2provider.put(folder.getNameExt(), prov);
208: Registry.registerReaderProvider(prov);
209: }
210:
211: private static void removeFolder(FileObject folder) {
212: NbReaderProvider prov = (NbReaderProvider) folder2provider
213: .remove(folder.getNameExt());
214: if (prov != null)
215: Registry.unregisterReaderProvider(prov);
216: }
217:
218: private class ProviderFolderListener extends FileChangeAdapter {
219:
220: public void fileDataCreated(FileEvent fev) {
221: FileObject file = fev.getFile();
222: if (!valid) {
223: boolean flag = true;
224: revalidate(flag);
225: }
226: }
227:
228: public void fileDeleted(FileEvent fev) {
229: if (valid)
230: revalidate(true);
231: }
232:
233: public void fileRenamed(FileRenameEvent fev) {
234: invalidate();
235: revalidate(true);
236: }
237:
238: public void fileChanged(FileEvent fev) {
239: invalidate();
240: revalidate(true);
241: }
242: }
243:
244: private static class RootFolderListener extends FileChangeAdapter {
245:
246: public void fileFolderCreated(FileEvent fev) {
247: FileObject file = fev.getFile();
248: if (DTD_FOLDER.equals(file.getNameExt())) {
249: file.addFileChangeListener(new DTDFolderListener());
250: NbReaderProvider.processSubfolders(file);
251: }
252: }
253:
254: public void fileDeleted(FileEvent fev) {
255: FileObject file = fev.getFile();
256: if (DTD_FOLDER.equals(file.getNameExt()))
257: NbReaderProvider.removeSubfolders();
258: }
259: }
260:
261: private static class DTDFolderListener extends FileChangeAdapter {
262:
263: public void fileFolderCreated(FileEvent fev) {
264: FileObject file = fev.getFile();
265: NbReaderProvider.addFolder(file);
266: }
267:
268: public void fileDeleted(FileEvent fev) {
269: FileObject file = fev.getFile();
270: NbReaderProvider.removeFolder(file);
271: }
272: }
273:
274: }
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