Examples of org.eclipse.jface.text.source.ISourceViewer

org.eclipse.jface.text.source.ISourceViewer
In addition to the text viewer functionality a source viewer supports:
- visual annotations based on an annotation model
- visual range indication
- management of text viewer add-ons
- explicit configuration
It is assumed that range indication and visual annotations are shown inside the same presentation area. There are no assumptions about whether this area is different from the viewer's text widget.
As the visibility of visual annotations can dynamically be changed, it is assumed that the annotation presentation area can dynamically be hidden if it is different from the text widget.
In order to provide backward compatibility for clients of ISourceViewer, extension interfaces are used as a means of evolution. The following extension interfaces exist:
- {@link org.eclipse.jface.text.source.ISourceViewerExtension} since version 2.1introducing the concept of an annotation overview.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension2} since version 3.0allowing source viewers to roll back a previously performed configuration and allows access to the viewer's visual annotation model.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension3} since version 3.2introducing the concept of a quick assist assistant and providing access to the quick assist invocation context as well as the current annotation hover.
- {@link org.eclipse.jface.text.source.ISourceViewerExtension4} since version 3.4introducing API to access a minimal set of content assistant APIs.
Clients may implement this interface and its extension interfaces or use the default implementation provided by {@link org.eclipse.jface.text.source.SourceViewer}.
@see org.eclipse.jface.text.source.ISourceViewerExtension @see org.eclipse.jface.text.source.ISourceViewerExtension2 @see org.eclipse.jface.text.source.ISourceViewerExtension3 @see org.eclipse.jface.text.source.ISourceViewerExtension4

  private void beginBusyStateInternal() {


    fBusyState = true;
    startBusyTimer();


    ISourceViewer viewer = getSourceViewer();
    if (viewer instanceof StructuredTextViewer) {
      ((StructuredTextViewer) viewer).beginBackgroundUpdate();


    }
    showBusy(true);

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        presenter.install(getSourceViewer());
        fOutlineHandler.configure(presenter);
      }
    }
    installCharacterPairing();
    ISourceViewer viewer = getSourceViewer();
    if (viewer instanceof ITextViewerExtension) {
      ((ITextViewerExtension) viewer).appendVerifyKeyListener(fPairInserter);
      fPairInserter.installCompletionListener();
    }

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      System.out.println("Total calls to getAdapter: " + adapterRequests); //$NON-NLS-1$
      System.out.println("Total time in getAdapter: " + adapterTime); //$NON-NLS-1$
      System.out.println("Average time per call: " + (adapterTime / adapterRequests)); //$NON-NLS-1$
    }


    ISourceViewer viewer = getSourceViewer();
    if (viewer instanceof ITextViewerExtension)
      ((ITextViewerExtension) viewer).removeVerifyKeyListener(fPairInserter);


    // dispose of information presenter
    if (fInformationPresenter != null) {

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  private void endBusyStateInternal(byte[] result) {
    if (fBackgroundJobEnded) {
      result[0] = 1;
      showBusy(false);


      ISourceViewer viewer = getSourceViewer();
      if (viewer instanceof StructuredTextViewer) {
        ((StructuredTextViewer) viewer).endBackgroundUpdate();
      }
      fBusyState = false;
    }

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  void gotoMatchingBracket() {
    ICharacterPairMatcher matcher = createCharacterPairMatcher();
    if (matcher == null)
      return;


    ISourceViewer sourceViewer = getSourceViewer();
    IDocument document = sourceViewer.getDocument();
    if (document == null)
      return;


    IRegion selection = getSignedSelection(sourceViewer);


    int selectionLength = Math.abs(selection.getLength());
    if (selectionLength > 1) {
      setStatusLineErrorMessage(SSEUIMessages.GotoMatchingBracket_error_invalidSelection);
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    int sourceCaretOffset = selection.getOffset() + selection.getLength();
    IRegion region = matcher.match(document, sourceCaretOffset);
    if (region == null) {
      setStatusLineErrorMessage(SSEUIMessages.GotoMatchingBracket_error_noMatchingBracket);
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    int offset = region.getOffset();
    int length = region.getLength();


    if (length < 1)
      return;


    int anchor = matcher.getAnchor();


    // go to after the match if matching to the right
    int targetOffset = (ICharacterPairMatcher.RIGHT == anchor) ? offset : offset + length;


    boolean visible = false;
    if (sourceViewer instanceof ITextViewerExtension5) {
      ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer;
      visible = (extension.modelOffset2WidgetOffset(targetOffset) > -1);
    }
    else {
      IRegion visibleRegion = sourceViewer.getVisibleRegion();
      // http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
      visible = (targetOffset >= visibleRegion.getOffset() && targetOffset <= visibleRegion.getOffset() + visibleRegion.getLength());
    }


    if (!visible) {
      setStatusLineErrorMessage(SSEUIMessages.GotoMatchingBracket_error_bracketOutsideSelectedElement);
      sourceViewer.getTextWidget().getDisplay().beep();
      return;
    }


    if (selection.getLength() < 0)
      targetOffset -= selection.getLength();


    if (sourceViewer != null) {
      sourceViewer.setSelectedRange(targetOffset, selection.getLength());
      sourceViewer.revealRange(targetOffset, selection.getLength());
    }
  }

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      }
    }


    // update content assist preferences
    else if (EditorPreferenceNames.CODEASSIST_PROPOSALS_BACKGROUND.equals(property)) {
      ISourceViewer sourceViewer = getSourceViewer();
      if (sourceViewer != null) {
        SourceViewerConfiguration configuration = getSourceViewerConfiguration();
        if (configuration != null) {
          IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
          if (contentAssistant instanceof ContentAssistant) {
            ContentAssistant assistant = (ContentAssistant) contentAssistant;
            RGB rgb = PreferenceConverter.getColor(getPreferenceStore(), EditorPreferenceNames.CODEASSIST_PROPOSALS_BACKGROUND);
            Color color = EditorUtility.getColor(rgb);
            assistant.setProposalSelectorBackground(color);
          }
        }
      }
    }


    // update content assist preferences
    else if (EditorPreferenceNames.CODEASSIST_PROPOSALS_FOREGROUND.equals(property)) {
      ISourceViewer sourceViewer = getSourceViewer();
      if (sourceViewer != null) {
        SourceViewerConfiguration configuration = getSourceViewerConfiguration();
        if (configuration != null) {
          IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
          if (contentAssistant instanceof ContentAssistant) {
            ContentAssistant assistant = (ContentAssistant) contentAssistant;
            RGB rgb = PreferenceConverter.getColor(getPreferenceStore(), EditorPreferenceNames.CODEASSIST_PROPOSALS_FOREGROUND);
            Color color = EditorUtility.getColor(rgb);
            assistant.setProposalSelectorForeground(color);
          }
        }
      }
    }


    // update content assist preferences
    else if (EditorPreferenceNames.CODEASSIST_PARAMETERS_BACKGROUND.equals(property)) {
      ISourceViewer sourceViewer = getSourceViewer();
      if (sourceViewer != null) {
        SourceViewerConfiguration configuration = getSourceViewerConfiguration();
        if (configuration != null) {
          IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
          if (contentAssistant instanceof ContentAssistant) {
            ContentAssistant assistant = (ContentAssistant) contentAssistant;
            RGB rgb = PreferenceConverter.getColor(getPreferenceStore(), EditorPreferenceNames.CODEASSIST_PARAMETERS_BACKGROUND);
            Color color = EditorUtility.getColor(rgb);
            assistant.setContextInformationPopupBackground(color);
            assistant.setContextSelectorBackground(color);
          }
        }
      }
    }


    // update content assist preferences
    else if (EditorPreferenceNames.CODEASSIST_PARAMETERS_FOREGROUND.equals(property)) {
      ISourceViewer sourceViewer = getSourceViewer();
      if (sourceViewer != null) {
        SourceViewerConfiguration configuration = getSourceViewerConfiguration();
        if (configuration != null) {
          IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
          if (contentAssistant instanceof ContentAssistant) {

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    for (int i = 0; i < types.length; i++) {


      String t = types[i];


      ISourceViewer sourceViewer = getSourceViewer();
      if (sourceViewer instanceof ITextViewerExtension2) {
        // Remove existing hovers
        ((ITextViewerExtension2) sourceViewer).removeTextHovers(t);


        int[] stateMasks = configuration.getConfiguredTextHoverStateMasks(getSourceViewer(), t);


        if (stateMasks != null) {
          for (int j = 0; j < stateMasks.length; j++) {
            int stateMask = stateMasks[j];
            ITextHover textHover = configuration.getTextHover(sourceViewer, t, stateMask);
            ((ITextViewerExtension2) sourceViewer).setTextHover(textHover, t, stateMask);
          }
        }
        else {
          ITextHover textHover = configuration.getTextHover(sourceViewer, t);
          ((ITextViewerExtension2) sourceViewer).setTextHover(textHover, t, ITextViewerExtension2.DEFAULT_HOVER_STATE_MASK);
        }
      }
      else
        sourceViewer.setTextHover(configuration.getTextHover(sourceViewer, t), t);
    }
  }

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    if (category == null)
      return;


    if (StructuredTextEditorActionConstants.STATUS_CATEGORY_OFFSET.equals(category)) {
      IStatusField field = getStatusField(category);
      ISourceViewer sourceViewer = getSourceViewer();
      if (field != null && sourceViewer != null) {
        Point selection = sourceViewer.getTextWidget().getSelection();
        int offset1 = widgetOffset2ModelOffset(sourceViewer, selection.x);
        int offset2 = widgetOffset2ModelOffset(sourceViewer, selection.y);
        String text = null;
        if (offset1 != offset2)
          text = "[" + offset1 + "-" + offset2 + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

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   * @param addedPositions the added positions
   * @param removedPositions the removed positions
   * @return the text presentation or <code>null</code>, if reconciliation should be canceled
   */
  public TextPresentation createPresentation(List addedPositions, List removedPositions) {
    ISourceViewer sourceViewer= fSourceViewer;
    StructuredPresentationReconciler presentationReconciler= fPresentationReconciler;
    if (sourceViewer == null || presentationReconciler == null)
      return null;


    if (isCanceled())
      return null;


    IDocument document= sourceViewer.getDocument();
    if (document == null)
      return null;


    int minStart= Integer.MAX_VALUE;
    int maxEnd= Integer.MIN_VALUE;

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    if (semanticHighlightingStrategy != null && document != null) {
      semanticHighlightingStrategy.reconcile(new Region(0, document.getLength()));
    }


    if ((getTextViewer() instanceof ISourceViewer)) {
      ISourceViewer sourceViewer = (ISourceViewer) getTextViewer();
      IAnnotationModel annotationModel = sourceViewer.getAnnotationModel();
      for (int i = 0; i < fReconcileListeners.length; i++) {
        fReconcileListeners[i].reconciled(document, annotationModel, false, new NullProgressMonitor());
      }
    }
  }

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