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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 import net.sourceforge.phpeclipse.ui.WebUI;
  25
  26 import org.eclipse.jface.text.IDocument;
  27 import org.eclipse.jface.text.ITextViewer;
  28 import org.eclipse.jface.text.TextPresentation;
  29 import org.eclipse.jface.text.contentassist.ICompletionProposal;
  30 import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
  31 import org.eclipse.jface.text.contentassist.IContextInformation;
  32 import org.eclipse.jface.text.contentassist.IContextInformationExtension;
  33 import org.eclipse.jface.text.contentassist.IContextInformationPresenter;
  34 import org.eclipse.jface.text.contentassist.IContextInformationValidator;
  35 import org.eclipse.jface.text.templates.TemplateContextType;
  36 import org.eclipse.swt.graphics.Image;
  37 import org.eclipse.ui.IEditorPart;
  38
  39 /**
  40  * HTML completion processor.
  41  */
  42 public class HTMLCompletionProcessor implements IContentAssistProcessor {
  43
  44         /**
  45          * Simple content assist tip closer. The tip is valid in a range of 5
  46          * characters around its popup location.
  47          */
  48         protected static class Validator implements IContextInformationValidator,
  49                         IContextInformationPresenter {
  50
  51                 protected int fInstallOffset;
  52
  53                 /*
  54                  * @see IContextInformationValidator#isContextInformationValid(int)
  55                  */
  56                 public boolean isContextInformationValid(int offset) {
  57                         return Math.abs(fInstallOffset - offset) < 5;
  58                 }
  59
  60                 /*
  61                  * @see IContextInformationValidator#install(IContextInformation,
  62                  *      ITextViewer, int)
  63                  */
  64                 public void install(IContextInformation info, ITextViewer viewer,
  65                                 int offset) {
  66                         fInstallOffset = offset;
  67                 }
  68
  69                 /*
  70                  * @see org.eclipse.jface.text.contentassist.IContextInformationPresenter#updatePresentation(int,
  71                  *      TextPresentation)
  72                  */
  73                 public boolean updatePresentation(int documentPosition,
  74                                 TextPresentation presentation) {
  75                         return false;
  76                 }
  77         };
  78
  79         private static class ContextInformationWrapper implements
  80                         IContextInformation, IContextInformationExtension {
  81
  82                 private final IContextInformation fContextInformation;
  83
  84                 private int fPosition;
  85
  86                 public ContextInformationWrapper(IContextInformation contextInformation) {
  87                         fContextInformation = contextInformation;
  88                 }
  89
  90                 /*
  91                  * @see IContextInformation#getContextDisplayString()
  92                  */
  93                 public String getContextDisplayString() {
  94                         return fContextInformation.getContextDisplayString();
  95                 }
  96
  97                 /*
  98                  * @see IContextInformation#getImage()
  99                  */
 100                 public Image getImage() {
 101                         return fContextInformation.getImage();
 102                 }
 103
 104                 /*
 105                  * @see IContextInformation#getInformationDisplayString()
 106                  */
 107                 public String getInformationDisplayString() {
 108                         return fContextInformation.getInformationDisplayString();
 109                 }
 110
 111                 /*
 112                  * @see IContextInformationExtension#getContextInformationPosition()
 113                  */
 114                 public int getContextInformationPosition() {
 115                         return fPosition;
 116                 }
 117
 118                 public void setContextInformationPosition(int position) {
 119                         fPosition = position;
 120                 }
 121         };
 122
 123         protected IContextInformationValidator fValidator = new Validator();
 124
 125         private TemplateEngine fTemplateEngine;
 126
 127         private char[] fProposalAutoActivationSet;
 128
 129         private PHPCompletionProposalComparator fComparator;
 130
 131         private int fNumberOfComputedResults = 0;
 132
 133         private IEditorPart fEditor;
 134
 135         protected IWorkingCopyManager fManager;
 136
 137         public HTMLCompletionProcessor(IEditorPart editor) {
 138                 fEditor = editor;
 139                 fManager = WebUI.getDefault().getWorkingCopyManager();
 140
 141                 TemplateContextType contextType = WebUI.getDefault()
 142                                 .getTemplateContextRegistry().getContextType("html"); //$NON-NLS-1$
 143                 if (contextType != null)
 144                         fTemplateEngine = new TemplateEngine(contextType);
 145
 146                 fComparator = new PHPCompletionProposalComparator();
 147         }
 148
 149         /*
 150          * (non-Javadoc) Method declared on IContentAssistProcessor
 151          */
 152         public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer,
 153                         int documentOffset) {
 154                 int contextInformationPosition = guessContextInformationPosition(
 155                                 viewer, documentOffset);
 156                 return internalComputeCompletionProposals(viewer, documentOffset,
 157                                 contextInformationPosition);
 158         }
 159
 160         private ICompletionProposal[] internalComputeCompletionProposals(
 161                         ITextViewer viewer, int offset, int contextOffset) {
 162                 IDocument document = viewer.getDocument();
 163                 ICompilationUnit unit = fManager.getWorkingCopy(fEditor
 164                                 .getEditorInput());
 165
 166                 if (fTemplateEngine != null) {
 167                         ICompletionProposal[] results;
 168                         // try {
 169                         fTemplateEngine.reset();
 170                         fTemplateEngine.complete(viewer, offset, unit);
 171                         // } catch (JavaModelException x) {
 172                         // Shell shell= viewer.getTextWidget().getShell();
 173                         // ErrorDialog.openError(shell,
 174                         // JavaTextMessages.getString("CompletionProcessor.error.accessing.title"),
 175                         // JavaTextMessages.getString("CompletionProcessor.error.accessing.message"),
 176                         // x.getStatus()); //$NON-NLS-2$ //$NON-NLS-1$
 177                         // }
 178
 179                         IPHPCompletionProposal[] templateResults = fTemplateEngine
 180                                         .getResults();
 181
 182                         // concatenate arrays
 183                         IPHPCompletionProposal[] total;
 184                         total = new IPHPCompletionProposal[templateResults.length];
 185                         System.arraycopy(templateResults, 0, total, 0,
 186                                         templateResults.length);
 187                         results = total;
 188
 189                         fNumberOfComputedResults = (results == null ? 0 : results.length);
 190                         /*
 191                          * Order here and not in result collector to make sure that the
 192                          * order applies to all proposals and not just those of the
 193                          * compilation unit.
 194                          */
 195                         return order(results);
 196                 }
 197                 return new IPHPCompletionProposal[0];
 198         }
 199
 200         private int guessContextInformationPosition(ITextViewer viewer, int offset) {
 201                 int contextPosition = offset;
 202                 IDocument document = viewer.getDocument();
 203                 return contextPosition;
 204         }
 205
 206         /*
 207          * (non-Javadoc) Method declared on IContentAssistProcessor
 208          */
 209         // public IContextInformation[] computeContextInformation(ITextViewer
 210         // viewer, int documentOffset) {
 211         // IContextInformation[] result = new IContextInformation[5];
 212         // for (int i = 0; i < result.length; i++)
 213         // result[i] = new
 214         // ContextInformation(MessageFormat.format(PHPEditorMessages.getString("CompletionProcessor.ContextInfo.display.pattern"),
 215         // new Object[] { new Integer(i), new Integer(documentOffset)}),
 216         // //$NON-NLS-1$
 217         // MessageFormat.format(PHPEditorMessages.getString("CompletionProcessor.ContextInfo.value.pattern"),
 218         // new Object[] { new Integer(i), new Integer(documentOffset - 5), new
 219         // Integer(documentOffset + 5)})); //$NON-NLS-1$
 220         // return result;
 221         // }
 222         /**
 223          * @see IContentAssistProcessor#computeContextInformation(ITextViewer, int)
 224          */
 225         public IContextInformation[] computeContextInformation(ITextViewer viewer,
 226                         int offset) {
 227                 int contextInformationPosition = guessContextInformationPosition(
 228                                 viewer, offset);
 229                 List result = addContextInformations(viewer, contextInformationPosition);
 230                 return (IContextInformation[]) result
 231                                 .toArray(new IContextInformation[result.size()]);
 232         }
 233
 234         private List addContextInformations(ITextViewer viewer, int offset) {
 235                 ICompletionProposal[] proposals = internalComputeCompletionProposals(
 236                                 viewer, offset, -1);
 237
 238                 List result = new ArrayList();
 239                 for (int i = 0; i < proposals.length; i++) {
 240                         IContextInformation contextInformation = proposals[i]
 241                                         .getContextInformation();
 242                         if (contextInformation != null) {
 243                                 ContextInformationWrapper wrapper = new ContextInformationWrapper(
 244                                                 contextInformation);
 245                                 wrapper.setContextInformationPosition(offset);
 246                                 result.add(wrapper);
 247                         }
 248                 }
 249                 return result;
 250         }
 251
 252         /**
 253          * Order the given proposals.
 254          */
 255         private ICompletionProposal[] order(ICompletionProposal[] proposals) {
 256                 Arrays.sort(proposals, fComparator);
 257                 return proposals;
 258         }
 259
 260         /**
 261          * Tells this processor to order the proposals alphabetically.
 262          *
 263          * @param order
 264          *            <code>true</code> if proposals should be ordered.
 265          */
 266         public void orderProposalsAlphabetically(boolean order) {
 267                 fComparator.setOrderAlphabetically(order);
 268         }
 269
 270         /**
 271          * @see IContentAssistProcessor#getCompletionProposalAutoActivationCharacters()
 272          */
 273         public char[] getCompletionProposalAutoActivationCharacters() {
 274                 return fProposalAutoActivationSet;
 275         }
 276
 277         /**
 278          * Sets this processor's set of characters triggering the activation of the
 279          * completion proposal computation.
 280          *
 281          * @param activationSet
 282          *            the activation set
 283          */
 284         public void setCompletionProposalAutoActivationCharacters(
 285                         char[] activationSet) {
 286                 fProposalAutoActivationSet = activationSet;
 287         }
 288
 289         /*
 290          * (non-Javadoc) Method declared on IContentAssistProcessor
 291          */
 292         public char[] getContextInformationAutoActivationCharacters() {
 293                 return new char[] {};
 294         }
 295
 296         /*
 297          * (non-Javadoc) Method declared on IContentAssistProcessor
 298          */
 299         public IContextInformationValidator getContextInformationValidator() {
 300                 return fValidator;
 301         }
 302
 303         /*
 304          * (non-Javadoc) Method declared on IContentAssistProcessor
 305          */
 306         public String getErrorMessage() {
 307                 return null;
 308         }
 309 }