Examples of org.eclipse.jface.text.TextPresentation

org.eclipse.jface.text.TextPresentation
Describes the presentation styles for a section of an indexed text such as a document or string. A text presentation defines a default style for the whole section and in addition style differences for individual subsections. Text presentations can be narrowed down to a particular result window. All methods are result window aware, i.e. ranges outside the result window are always ignored.
All iterators provided by a text presentation assume that they enumerate non overlapping, consecutive ranges inside the default range. Thus, all these iterators do not include the default range. The default style range must be explicitly asked for using getDefaultStyleRange.


        // The HTML2TextReader does not render <p> like a browser.
        // Instead of inserting an empty line, it just adds a single line break.
        // Furthermore, the indentation of <dl><dd> elements is too small (e.g
        // with a long @see line)
        final TextPresentation presentation = new TextPresentation();
        final HTML2TextReader reader = new HTML2TextReader(new StringReader(
                fInput.getHtml()), presentation);
        String text;
        try {
            try {
                text = reader.getString();
            } catch (final IOException e) {
                text = ""; //$NON-NLS-1$
            }
        } finally {
            try {
                reader.close();
            } catch (final IOException e) {
            }
        }


        fTextLayout.setText(text);
        fTextLayout.setWidth(sizeConstraints == null ? SWT.DEFAULT : sizeConstraints.x
                - trim.width);
        @SuppressWarnings("rawtypes")
        final Iterator iter = presentation.getAllStyleRangeIterator();
        while (iter.hasNext()) {
            final StyleRange sr = (StyleRange) iter.next();
            if (sr.fontStyle == SWT.BOLD) {
                fTextLayout.setStyle(fBoldStyle, sr.start, sr.start + sr.length - 1);
            }

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    return result;
  }


  private void applyDiffPresentation(SourceViewer oldViewer, SourceViewer newViewer,
      UpdatableScript.TextualDiff textualDiff) {
    TextPresentation oldPresentation = new TextPresentation();
    TextPresentation newPresentation = new TextPresentation();


    List<Long> chunkNumbers = textualDiff.getChunks();
    int posOld = 0;
    int posNew = 0;
    for (int i = 0; i < chunkNumbers.size(); i += 3) {
      int startOld = chunkNumbers.get(i + 0).intValue();
      int endOld = chunkNumbers.get(i + 1).intValue();
      int endNew = chunkNumbers.get(i + 2).intValue();
      int startNew = startOld - posOld + posNew;


      if (startOld == endOld) {
        // Add
        newPresentation.addStyleRange(new StyleRange(startNew, endNew - startNew,
            null, colors.get(ColorName.ADDED_BACKGROUND)));
      } else if (startNew == endNew) {
        // Remove
        oldPresentation.addStyleRange(new StyleRange(startOld, endOld - startOld,
            null, colors.get(ColorName.ADDED_BACKGROUND)));
      } else {
        // Replace
        newPresentation.addStyleRange(new StyleRange(startNew, endNew - startNew,
            null, colors.get(ColorName.CHANGED_BACKGROUND)));
        oldPresentation.addStyleRange(new StyleRange(startOld, endOld - startOld,
            null, colors.get(ColorName.CHANGED_BACKGROUND)));
      }

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        IFile activeFile = hFile.getRealFile();
        HaxeProject project = Activator.getProjectManager().getCurrentHaxeProject();
        CodeFile currFile = project.getFile(activeFile);
        String currPack = currFile.getPackage();
        
        TextPresentation presentation = new TextPresentation();
        
        for (NodeLink info : usagesList.get(currPack))
        {
            HaxeTree node = info.getNode();
            int offset = node.getMostLeftPosition();
            int end = node.getMostRightPosition();


            Display display = Display.getDefault();
            StyleRange styleRange = new StyleRange(            
                    offset, end - offset + 1,
                    display.getSystemColor(SWT.COLOR_WHITE),
                    display.getSystemColor(SWT.COLOR_BLUE),
                    SWT.NORMAL);


            // Negative (possibly 0) length style ranges will cause an 
            // IllegalArgumentException in changeTextPresentation(..)
            if (styleRange.length > 0 ) 
            {
                presentation.addStyleRange(styleRange);
            }
        }
        if (!presentation.isEmpty() && view.isEditable())
        {
            view.changeTextPresentation(presentation, true);
        }
    }

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  protected TextPresentation createPresentation(IRegion damage, IDocument document) {
    try {
      int validLength = Math.min(damage.getLength(), document.getLength() - damage.getOffset());
      
      if (fRepairers == null || fRepairers.isEmpty()) {
        TextPresentation presentation= new TextPresentation(damage, 1);
        presentation.setDefaultStyleRange(new StyleRange(damage.getOffset(), validLength, null, null));
        return presentation;
      }


      TextPresentation presentation= new TextPresentation(damage, 1000);


      ITypedRegion[] partitions= TextUtilities.computePartitioning(document, getDocumentPartitioning(), damage.getOffset(), validLength, false);
      for (int i= 0; i < partitions.length; i++) {
        ITypedRegion r= partitions[i];
        IPresentationRepairer repairer= getRepairer(r.getType());

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   * @param damage the damage to be repaired
   * @param document the document whose presentation must be repaired
   */
  void processDamage(IRegion damage, IDocument document) {
    if (damage != null && damage.getLength() > 0) {
      TextPresentation p = createPresentation(damage, document);
      if (p != null) {
        /**
         * 229749 - Read-Only highlighting support missing
         * 272981 - Read-only highlighting moved to semantic highlighting
         */

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          if (current != null)
            newPositions.add(current);
        }
        fRemovedPositions = newPositions;
        
        TextPresentation presentation = null;
        if (!fJobPresenter.isCanceled())
          presentation = fJobPresenter.createPresentation(fAddedPositions, fRemovedPositions);
        if (!fJobPresenter.isCanceled())
          updatePresentation(presentation, fAddedPositions, fRemovedPositions);
      }

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        if (!_jobPresenter.isCanceled()) {
            _reconcilePositions(subtrees);
        }


        TextPresentation textPresentation = null;


        if (!_jobPresenter.isCanceled()) {
            textPresentation = _jobPresenter.createPresentation(
                    _addedPositions, _removedPositions);
        }

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   *         <code>null</code> if the partitioning could not be computed
   */
  protected TextPresentation createPresentation(IRegion damage, IDocument document) {
    try {
      if (fRepairers == null || fRepairers.isEmpty()) {
        TextPresentation presentation= new TextPresentation(damage, 100);
        presentation.setDefaultStyleRange(new StyleRange(damage.getOffset(), damage.getLength(), null, null));
        return presentation;
      }


      TextPresentation presentation= new TextPresentation(damage, 1000);


      ITypedRegion[] partitioning= TextUtilities.computePartitioning(document, getDocumentPartitioning(), damage.getOffset(), damage.getLength(), false);
      for (int i= 0; i < partitioning.length; i++) {
        ITypedRegion r= partitioning[i];
        IPresentationRepairer repairer= getRepairer(r.getType());

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   * @param damage the damage to be repaired
   * @param document the document whose presentation must be repaired
   */
  private void processDamage(IRegion damage, IDocument document) {
    if (damage != null && damage.getLength() > 0) {
      TextPresentation p= createPresentation(damage, document);
      if (p != null)
        applyTextRegionCollection(p);
    }
  }

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    fContentAssistSubjectControlAdapter.installValidator(frame);


    if (frame.fPresenter != null) {
      if (fTextPresentation == null)
        fTextPresentation= new TextPresentation();
      fContentAssistSubjectControlAdapter.installContextInformationPresenter(frame);
      frame.fPresenter.updatePresentation(frame.fOffset, fTextPresentation);
    }


    createContextInfoPopup();

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