nitind | 7de149b | 2005-10-31 21:12:32 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2005 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | * |
| 11 | *******************************************************************************/ |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 12 | package org.eclipse.wst.dtd.ui.internal.projection; |
| 13 | |
| 14 | import java.util.Iterator; |
| 15 | import java.util.List; |
| 16 | |
| 17 | import org.eclipse.core.runtime.Platform; |
| 18 | import org.eclipse.jface.text.BadLocationException; |
| 19 | import org.eclipse.jface.text.IDocument; |
| 20 | import org.eclipse.jface.text.Position; |
| 21 | import org.eclipse.jface.text.source.projection.IProjectionListener; |
| 22 | import org.eclipse.jface.text.source.projection.ProjectionAnnotation; |
| 23 | import org.eclipse.jface.text.source.projection.ProjectionViewer; |
nitind | d6e591d | 2005-03-14 22:21:57 +0000 | [diff] [blame] | 24 | import org.eclipse.wst.dtd.core.internal.DTDFile; |
| 25 | import org.eclipse.wst.dtd.core.internal.DTDNode; |
| 26 | import org.eclipse.wst.dtd.core.internal.TopLevelNode; |
| 27 | import org.eclipse.wst.dtd.core.internal.document.DTDModelImpl; |
| 28 | import org.eclipse.wst.dtd.core.internal.event.IDTDFileListener; |
| 29 | import org.eclipse.wst.dtd.core.internal.event.NodesEvent; |
david_williams | 4ad020f | 2005-04-18 08:00:30 +0000 | [diff] [blame] | 30 | import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| 31 | import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| 32 | import org.eclipse.wst.sse.core.internal.provisional.StructuredModelManager; |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 33 | import org.eclipse.wst.sse.ui.internal.projection.IStructuredTextFoldingProvider; |
| 34 | import org.w3c.dom.Node; |
| 35 | |
| 36 | /** |
| 37 | * Updates the projection model of a structured model for DTD. |
| 38 | */ |
| 39 | public class StructuredTextFoldingProviderDTD implements IStructuredTextFoldingProvider, IProjectionListener, IDTDFileListener { |
| 40 | private final static boolean debugProjectionPerf = "true".equalsIgnoreCase(Platform.getDebugOption("org.eclipse.wst.dtd.ui/projectionperf")); //$NON-NLS-1$ //$NON-NLS-2$ |
| 41 | |
| 42 | private class TagProjectionAnnotation extends ProjectionAnnotation { |
| 43 | private Node fNode; |
| 44 | |
| 45 | public TagProjectionAnnotation(Node node, boolean isCollapsed) { |
| 46 | super(isCollapsed); |
| 47 | fNode = node; |
| 48 | } |
| 49 | |
| 50 | public Node getNode() { |
| 51 | return fNode; |
| 52 | } |
| 53 | |
| 54 | public void setNode(Node node) { |
| 55 | fNode = node; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | private IDocument fDocument; |
| 60 | private ProjectionViewer fViewer; |
| 61 | |
| 62 | |
| 63 | /** |
| 64 | * Goes through every node creates projection annotation if needed |
| 65 | * |
| 66 | * @param DTDFile |
| 67 | * assumes file is not null |
| 68 | */ |
| 69 | private void addAllAnnotations(DTDFile file) { |
| 70 | long start = System.currentTimeMillis(); |
| 71 | |
| 72 | List nodes = file.getNodes(); |
| 73 | Iterator it = nodes.iterator(); |
| 74 | while (it.hasNext()) { |
| 75 | DTDNode node = (DTDNode) it.next(); |
| 76 | Position newPos = createProjectionPosition(node); |
| 77 | if (newPos != null) { |
| 78 | TagProjectionAnnotation newAnnotation = new TagProjectionAnnotation(node, false); |
| 79 | // add to map containing annotations to add |
| 80 | fViewer.getProjectionAnnotationModel().addAnnotation(newAnnotation, newPos); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | long end = System.currentTimeMillis(); |
| 85 | if (debugProjectionPerf) |
david_williams | 3804601 | 2005-04-08 19:04:29 +0000 | [diff] [blame] | 86 | System.out.println("StructuredTextFoldingProviderDTD.addAllAnnotations: " + (end - start)); //$NON-NLS-1$ |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Create a projection position from the given node. Able to get |
| 91 | * projection position if node isNodeProjectable. |
| 92 | * |
| 93 | * @param node |
| 94 | * @return null if no projection position possible, a Position otherwise |
| 95 | */ |
| 96 | private Position createProjectionPosition(Node node) { |
| 97 | Position pos = null; |
| 98 | if (isNodeProjectable(node) && node instanceof IndexedRegion) { |
| 99 | IDocument document = fViewer.getDocument(); |
| 100 | if (document != null) { |
| 101 | IndexedRegion inode = (IndexedRegion) node; |
| 102 | int start = inode.getStartOffset(); |
| 103 | int end = inode.getEndOffset(); |
| 104 | if (start >= 0 && start < end) { |
| 105 | try { |
| 106 | int startLine = fDocument.getLineOfOffset(start); |
| 107 | int endLine = fDocument.getLineOfOffset(end); |
| 108 | // checks if projection start/end region is on the |
| 109 | // same line |
| 110 | if ((startLine < endLine) && (endLine + 1 < fDocument.getNumberOfLines())) { |
| 111 | int offset = fDocument.getLineOffset(startLine); |
| 112 | int endOffset = fDocument.getLineOffset(endLine + 1); |
| 113 | pos = new Position(offset, endOffset - offset); |
| 114 | } |
| 115 | } |
| 116 | catch (BadLocationException x) { |
| 117 | // Logger.log(Logger.WARNING_DEBUG, null, x); |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | return pos; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Searches through projection annotation model and retrieves |
| 127 | * TagProjectionAnnotation for node |
| 128 | * |
| 129 | * @param node |
| 130 | * @return TagProjectionAnnotation for node or null if could not be found |
| 131 | */ |
| 132 | private TagProjectionAnnotation findExistingAnnotation(Node node) { |
| 133 | TagProjectionAnnotation anno = null; |
| 134 | |
| 135 | if (node != null) { |
| 136 | Iterator it = fViewer.getProjectionAnnotationModel().getAnnotationIterator(); |
| 137 | while (it.hasNext() && anno == null) { |
| 138 | TagProjectionAnnotation a = (TagProjectionAnnotation) it.next(); |
| 139 | if (node.equals(a.getNode())) |
| 140 | anno = a; |
| 141 | } |
| 142 | } |
| 143 | return anno; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Get the dtd file for the fDocument |
| 148 | * |
| 149 | * @param document |
| 150 | * @return |
| 151 | */ |
| 152 | private DTDFile getDTDFile() { |
| 153 | DTDFile dtdFile = null; |
| 154 | |
| 155 | IStructuredModel sModel = null; |
| 156 | try { |
| 157 | sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument); |
| 158 | if (sModel instanceof DTDModelImpl) { |
| 159 | dtdFile = ((DTDModelImpl) sModel).getDTDFile(); |
| 160 | } |
| 161 | } |
| 162 | finally { |
| 163 | if (sModel != null) { |
| 164 | sModel.releaseFromRead(); |
| 165 | } |
| 166 | } |
| 167 | return dtdFile; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Initialize this provider with the correct document. Assumes projection |
| 172 | * is enabled. (otherwise, only install would have been called) |
| 173 | */ |
| 174 | public void initialize() { |
| 175 | if (!isInstalled()) |
| 176 | return; |
| 177 | |
| 178 | // remove dtd file listener from old dtd file |
| 179 | DTDFile file = getDTDFile(); |
| 180 | if (file != null) { |
| 181 | file.removeDTDFileListener(this); |
| 182 | } |
| 183 | |
| 184 | // clear out all annotations |
| 185 | if (fViewer.getProjectionAnnotationModel() != null) |
| 186 | fViewer.getProjectionAnnotationModel().removeAllAnnotations(); |
| 187 | |
| 188 | fDocument = fViewer.getDocument(); |
| 189 | file = getDTDFile(); |
| 190 | if (file != null) { |
| 191 | // add dtd file listener to new dtd file |
| 192 | file.addDTDFileListener(this); |
| 193 | |
| 194 | addAllAnnotations(file); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Associate a ProjectionViewer with this IStructuredTextFoldingProvider |
| 200 | * |
| 201 | * @param viewer |
| 202 | */ |
| 203 | public void install(ProjectionViewer viewer) { |
| 204 | // uninstall before trying to install new viewer |
| 205 | if (isInstalled()) { |
| 206 | uninstall(); |
| 207 | } |
| 208 | fViewer = viewer; |
| 209 | fViewer.addProjectionListener(this); |
| 210 | } |
| 211 | |
| 212 | private boolean isInstalled() { |
| 213 | return fViewer != null; |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Returns true if node is a node type able to fold |
| 218 | * |
| 219 | * @param node |
| 220 | * @return boolean true if node is projectable, false otherwise |
| 221 | */ |
| 222 | private boolean isNodeProjectable(Node node) { |
| 223 | if (node != null) { |
| 224 | if (node instanceof TopLevelNode) |
| 225 | return true; |
| 226 | } |
| 227 | return false; |
| 228 | } |
| 229 | |
| 230 | public void nodeChanged(DTDNode node) { |
| 231 | long start = System.currentTimeMillis(); |
| 232 | |
| 233 | // recalculate projection annotations for node |
| 234 | // check if this was even a projectable node to start with |
| 235 | if (isNodeProjectable(node)) { |
| 236 | // find the existing annotation |
| 237 | TagProjectionAnnotation anno = findExistingAnnotation(node); |
| 238 | // if able to project node see if projection annotation was |
| 239 | // already created and create new if needed |
| 240 | Position newPos = createProjectionPosition(node); |
| 241 | if (newPos != null && anno == null) { |
| 242 | TagProjectionAnnotation newAnnotation = new TagProjectionAnnotation(node, false); |
| 243 | // add to map containing annotations to add |
| 244 | fViewer.getProjectionAnnotationModel().addAnnotation(newAnnotation, newPos); |
| 245 | } |
| 246 | // if not able to project node see if projection annotation was |
| 247 | // already created and remove it |
| 248 | if (newPos == null && anno != null) { |
| 249 | fViewer.getProjectionAnnotationModel().removeAnnotation(anno); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | long end = System.currentTimeMillis(); |
| 254 | if (debugProjectionPerf) { |
david_williams | 3804601 | 2005-04-08 19:04:29 +0000 | [diff] [blame] | 255 | String nodeName = node != null ? node.getNodeName() : "null"; //$NON-NLS-1$ |
| 256 | System.out.println("StructuredTextFoldingProviderDTD.nodeChanged (" + nodeName + "):" + (end - start)); //$NON-NLS-1$ //$NON-NLS-2$ |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 257 | } |
| 258 | } |
| 259 | |
| 260 | public void nodesAdded(NodesEvent event) { |
| 261 | long start = System.currentTimeMillis(); |
| 262 | |
| 263 | // add projection annotations for all nodes in event.getNodes() |
| 264 | List nodes = event.getNodes(); |
| 265 | Iterator it = nodes.iterator(); |
| 266 | while (it.hasNext()) { |
| 267 | DTDNode node = (DTDNode) it.next(); |
| 268 | if (isNodeProjectable(node)) { |
| 269 | // add |
| 270 | Position newPos = createProjectionPosition(node); |
| 271 | if (newPos != null) { |
| 272 | TagProjectionAnnotation newAnnotation = new TagProjectionAnnotation(node, false); |
| 273 | // add to map containing annotations to add |
| 274 | fViewer.getProjectionAnnotationModel().addAnnotation(newAnnotation, newPos); |
| 275 | } |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | long end = System.currentTimeMillis(); |
| 280 | if (debugProjectionPerf) |
david_williams | 3804601 | 2005-04-08 19:04:29 +0000 | [diff] [blame] | 281 | System.out.println("StructuredTextFoldingProviderDTD.nodesAdded: " + (end - start)); //$NON-NLS-1$ |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | public void nodesRemoved(NodesEvent event) { |
| 285 | long start = System.currentTimeMillis(); |
| 286 | |
| 287 | // remove projection annotations for all nodes in event.getNodes() |
| 288 | List nodes = event.getNodes(); |
| 289 | Iterator it = nodes.iterator(); |
| 290 | while (it.hasNext()) { |
| 291 | DTDNode node = (DTDNode) it.next(); |
| 292 | // check if removed node was projectable in the first place |
| 293 | if (isNodeProjectable(node)) { |
| 294 | // remove |
| 295 | TagProjectionAnnotation anno = findExistingAnnotation(node); |
| 296 | if (anno != null) |
| 297 | fViewer.getProjectionAnnotationModel().removeAnnotation(anno); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | long end = System.currentTimeMillis(); |
| 302 | if (debugProjectionPerf) |
david_williams | 3804601 | 2005-04-08 19:04:29 +0000 | [diff] [blame] | 303 | System.out.println("StructuredTextFoldingProviderDTD.nodesRemoved: " + (end - start)); //$NON-NLS-1$ |
david_williams | b1f7505 | 2005-02-18 00:25:37 +0000 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | public void projectionDisabled() { |
| 307 | DTDFile file = getDTDFile(); |
| 308 | if (file != null) { |
| 309 | file.removeDTDFileListener(this); |
| 310 | } |
| 311 | |
| 312 | fDocument = null; |
| 313 | } |
| 314 | |
| 315 | public void projectionEnabled() { |
| 316 | initialize(); |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Disconnect this IStructuredTextFoldingProvider from projection viewer |
| 321 | */ |
| 322 | public void uninstall() { |
| 323 | if (isInstalled()) { |
| 324 | projectionDisabled(); |
| 325 | |
| 326 | fViewer.removeProjectionListener(this); |
| 327 | fViewer = null; |
| 328 | } |
| 329 | } |
| 330 | } |