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   1 /**********************************************************************
   2  Copyright (c) 2000, 2002 IBM Corp. and others.
   3  All rights reserved. This program and the accompanying materials
   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  IBM Corporation - Initial implementation
  10  www.phpeclipse.de
  11  **********************************************************************/
  12 package net.sourceforge.phpeclipse.phpeditor.php;
  13
  14 import java.util.ArrayList;
  15 import java.util.Arrays;
  16 import java.util.List;
  17
  18 import net.sourceforge.phpdt.core.ICompilationUnit;
  19 import net.sourceforge.phpdt.internal.ui.text.java.IPHPCompletionProposal;
  20 import net.sourceforge.phpdt.internal.ui.text.java.PHPCompletionProposalComparator;
  21 import net.sourceforge.phpdt.internal.ui.text.template.contentassist.TemplateEngine;
  22 import net.sourceforge.phpdt.ui.IWorkingCopyManager;
  23 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  24
  25 import org.eclipse.jface.text.IDocument;
  26 import org.eclipse.jface.text.ITextViewer;
  27 import org.eclipse.jface.text.TextPresentation;
  28 import org.eclipse.jface.text.contentassist.ICompletionProposal;
  29 import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
  30 import org.eclipse.jface.text.contentassist.IContextInformation;
  31 import org.eclipse.jface.text.contentassist.IContextInformationExtension;
  32 import org.eclipse.jface.text.contentassist.IContextInformationPresenter;
  33 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
  34 import org.eclipse.jface.text.templates.TemplateContextType;
  35 import org.eclipse.swt.graphics.Image;
  36 import org.eclipse.ui.IEditorPart;
  37
  38 /**
  39  * HTML completion processor.
  40  */
  41 public class HTMLCompletionProcessor implements IContentAssistProcessor {
  42
  43         /**
  44          * Simple content assist tip closer. The tip is valid in a range of 5
  45          * characters around its popup location.
  46          */
  47         protected static class Validator implements IContextInformationValidator,
  48                         IContextInformationPresenter {
  49
  50                 protected int fInstallOffset;
  51
  52                 /*
  53                  * @see IContextInformationValidator#isContextInformationValid(int)
  54                  */
  55                 public boolean isContextInformationValid(int offset) {
  56                         return Math.abs(fInstallOffset - offset) < 5;
  57                 }
  58
  59                 /*
  60                  * @see IContextInformationValidator#install(IContextInformation,
  61                  *      ITextViewer, int)
  62                  */
  63                 public void install(IContextInformation info, ITextViewer viewer,
  64                                 int offset) {
  65                         fInstallOffset = offset;
  66                 }
  67
  68                 /*
  69                  * @see org.eclipse.jface.text.contentassist.IContextInformationPresenter#updatePresentation(int,
  70                  *      TextPresentation)
  71                  */
  72                 public boolean updatePresentation(int documentPosition,
  73                                 TextPresentation presentation) {
  74                         return false;
  75                 }
  76         };
  77
  78         private static class ContextInformationWrapper implements
  79                         IContextInformation, IContextInformationExtension {
  80
  81                 private final IContextInformation fContextInformation;
  82
  83                 private int fPosition;
  84
  85                 public ContextInformationWrapper(IContextInformation contextInformation) {
  86                         fContextInformation = contextInformation;
  87                 }
  88
  89                 /*
  90                  * @see IContextInformation#getContextDisplayString()
  91                  */
  92                 public String getContextDisplayString() {
  93                         return fContextInformation.getContextDisplayString();
  94                 }
  95
  96                 /*
  97                  * @see IContextInformation#getImage()
  98                  */
  99                 public Image getImage() {
 100                         return fContextInformation.getImage();
 101                 }
 102
 103                 /*
 104                  * @see IContextInformation#getInformationDisplayString()
 105                  */
 106                 public String getInformationDisplayString() {
 107                         return fContextInformation.getInformationDisplayString();
 108                 }
 109
 110                 /*
 111                  * @see IContextInformationExtension#getContextInformationPosition()
 112                  */
 113                 public int getContextInformationPosition() {
 114                         return fPosition;
 115                 }
 116
 117                 public void setContextInformationPosition(int position) {
 118                         fPosition = position;
 119                 }
 120         };
 121
 122         protected IContextInformationValidator fValidator = new Validator();
 123
 124         private TemplateEngine fTemplateEngine;
 125
 126         private char[] fProposalAutoActivationSet;
 127
 128         private PHPCompletionProposalComparator fComparator;
 129
 130         private int fNumberOfComputedResults = 0;
 131
 132         private IEditorPart fEditor;
 133
 134         protected IWorkingCopyManager fManager;
 135
 136         public HTMLCompletionProcessor(IEditorPart editor) {
 137                 fEditor = editor;
 138                 fManager = PHPeclipsePlugin.getDefault().getWorkingCopyManager();
 139
 140                 TemplateContextType contextType = PHPeclipsePlugin.getDefault()
 141                                 .getTemplateContextRegistry().getContextType("html"); //$NON-NLS-1$
 142                 if (contextType != null)
 143                         fTemplateEngine = new TemplateEngine(contextType);
 144
 145                 fComparator = new PHPCompletionProposalComparator();
 146         }
 147
 148         /*
 149          * (non-Javadoc) Method declared on IContentAssistProcessor
 150          */
 151         public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer,
 152                         int documentOffset) {
 153                 int contextInformationPosition = guessContextInformationPosition(
 154                                 viewer, documentOffset);
 155                 return internalComputeCompletionProposals(viewer, documentOffset,
 156                                 contextInformationPosition);
 157         }
 158
 159         private ICompletionProposal[] internalComputeCompletionProposals(
 160                         ITextViewer viewer, int offset, int contextOffset) {
 161                 IDocument document = viewer.getDocument();
 162                 ICompilationUnit unit = fManager.getWorkingCopy(fEditor
 163                                 .getEditorInput());
 164
 165                 if (fTemplateEngine != null) {
 166                         ICompletionProposal[] results;
 167                         // try {
 168                         fTemplateEngine.reset();
 169                         fTemplateEngine.complete(viewer, offset, unit);
 170                         // } catch (JavaModelException x) {
 171                         // Shell shell= viewer.getTextWidget().getShell();
 172                         // ErrorDialog.openError(shell,
 173                         // JavaTextMessages.getString("CompletionProcessor.error.accessing.title"),
 174                         // JavaTextMessages.getString("CompletionProcessor.error.accessing.message"),
 175                         // x.getStatus()); //$NON-NLS-2$ //$NON-NLS-1$
 176                         // }
 177
 178                         IPHPCompletionProposal[] templateResults = fTemplateEngine
 179                                         .getResults();
 180
 181                         // concatenate arrays
 182                         IPHPCompletionProposal[] total;
 183                         total = new IPHPCompletionProposal[templateResults.length];
 184                         System.arraycopy(templateResults, 0, total, 0,
 185                                         templateResults.length);
 186                         results = total;
 187
 188                         fNumberOfComputedResults = (results == null ? 0 : results.length);
 189                         /*
 190                          * Order here and not in result collector to make sure that the
 191                          * order applies to all proposals and not just those of the
 192                          * compilation unit.
 193                          */
 194                         return order(results);
 195                 }
 196                 return new IPHPCompletionProposal[0];
 197         }
 198
 199         private int guessContextInformationPosition(ITextViewer viewer, int offset) {
 200                 int contextPosition = offset;
 201                 IDocument document = viewer.getDocument();
 202                 return contextPosition;
 203         }
 204
 205         /*
 206          * (non-Javadoc) Method declared on IContentAssistProcessor
 207          */
 208         // public IContextInformation[] computeContextInformation(ITextViewer
 209         // viewer, int documentOffset) {
 210         // IContextInformation[] result = new IContextInformation[5];
 211         // for (int i = 0; i < result.length; i++)
 212         // result[i] = new
 213         // ContextInformation(MessageFormat.format(PHPEditorMessages.getString("CompletionProcessor.ContextInfo.display.pattern"),
 214         // new Object[] { new Integer(i), new Integer(documentOffset)}),
 215         // //$NON-NLS-1$
 216         // MessageFormat.format(PHPEditorMessages.getString("CompletionProcessor.ContextInfo.value.pattern"),
 217         // new Object[] { new Integer(i), new Integer(documentOffset - 5), new
 218         // Integer(documentOffset + 5)})); //$NON-NLS-1$
 219         // return result;
 220         // }
 221         /**
 222          * @see IContentAssistProcessor#computeContextInformation(ITextViewer, int)
 223          */
 224         public IContextInformation[] computeContextInformation(ITextViewer viewer,
 225                         int offset) {
 226                 int contextInformationPosition = guessContextInformationPosition(
 227                                 viewer, offset);
 228                 List result = addContextInformations(viewer, contextInformationPosition);
 229                 return (IContextInformation[]) result
 230                                 .toArray(new IContextInformation[result.size()]);
 231         }
 232
 233         private List addContextInformations(ITextViewer viewer, int offset) {
 234                 ICompletionProposal[] proposals = internalComputeCompletionProposals(
 235                                 viewer, offset, -1);
 236
 237                 List result = new ArrayList();
 238                 for (int i = 0; i < proposals.length; i++) {
 239                         IContextInformation contextInformation = proposals[i]
 240                                         .getContextInformation();
 241                         if (contextInformation != null) {
 242                                 ContextInformationWrapper wrapper = new ContextInformationWrapper(
 243                                                 contextInformation);
 244                                 wrapper.setContextInformationPosition(offset);
 245                                 result.add(wrapper);
 246                         }
 247                 }
 248                 return result;
 249         }
 250
 251         /**
 252          * Order the given proposals.
 253          */
 254         private ICompletionProposal[] order(ICompletionProposal[] proposals) {
 255                 Arrays.sort(proposals, fComparator);
 256                 return proposals;
 257         }
 258
 259         /**
 260          * Tells this processor to order the proposals alphabetically.
 261          *
 262          * @param order
 263          *            <code>true</code> if proposals should be ordered.
 264          */
 265         public void orderProposalsAlphabetically(boolean order) {
 266                 fComparator.setOrderAlphabetically(order);
 267         }
 268
 269         /**
 270          * @see IContentAssistProcessor#getCompletionProposalAutoActivationCharacters()
 271          */
 272         public char[] getCompletionProposalAutoActivationCharacters() {
 273                 return fProposalAutoActivationSet;
 274         }
 275
 276         /**
 277          * Sets this processor's set of characters triggering the activation of the
 278          * completion proposal computation.
 279          *
 280          * @param activationSet
 281          *            the activation set
 282          */
 283         public void setCompletionProposalAutoActivationCharacters(
 284                         char[] activationSet) {
 285                 fProposalAutoActivationSet = activationSet;
 286         }
 287
 288         /*
 289          * (non-Javadoc) Method declared on IContentAssistProcessor
 290          */
 291         public char[] getContextInformationAutoActivationCharacters() {
 292                 return new char[] {};
 293         }
 294
 295         /*
 296          * (non-Javadoc) Method declared on IContentAssistProcessor
 297          */
 298         public IContextInformationValidator getContextInformationValidator() {
 299                 return fValidator;
 300         }
 301
 302         /*
 303          * (non-Javadoc) Method declared on IContentAssistProcessor
 304          */
 305         public String getErrorMessage() {
 306                 return null;
 307         }
 308 }