Examples of org.eclipse.jface.text.ITextHover

org.eclipse.jface.text.ITextHover
Computes the information to be shown in a hover popup which appears on top of the text viewer's text widget when a hover event occurs. If the text hover does not provide information no hover popup is shown. Any implementer of this interface must be capable of operating in a non-UI thread.
In order to provide backward compatibility for clients of ITextHover, extension interfaces are used as a means of evolution. The following extension interfaces exist:
- {@link org.eclipse.jface.text.ITextHoverExtension} since version 3.0allowing a text hover to provide a creator for the hover control. This allows for sophisticated hovers in a way that information computed by the hover can be displayed in the best possible form.
- {@link org.eclipse.jface.text.ITextHoverExtension2} since version 3.4allowing a text hover to return hover-specific information objects.
Clients may implement this interface.
@see org.eclipse.jface.text.ITextHoverExtension @see org.eclipse.jface.text.ITextHoverExtension2 @see org.eclipse.jface.text.ITextViewer

        }


        final ITextViewerExtension2 textViewerExtension2 = (ITextViewerExtension2) sourceViewer;


        // does a text hover exist?
        final ITextHover textHover = textViewerExtension2.getCurrentTextHover();
        if (textHover == null) {
            // TODO this crashes... why?
            // fTextOperationAction.run();
            return;
        }


        final Point hoverEventLocation = textViewerExtension2.getHoverEventLocation();
        final int offset = computeOffsetAtLocation(sourceViewer, hoverEventLocation.x,
                hoverEventLocation.y);
        if (offset == -1) {
            fTextOperationAction.run();
            return;
        }


        try {
            // get the text hover content
            final String contentType = TextUtilities.getContentType(
                    sourceViewer.getDocument(), IErlangPartitions.ERLANG_PARTITIONING,
                    offset, true);


            final IRegion hoverRegion = textHover.getHoverRegion(sourceViewer, offset);
            if (hoverRegion == null) {
                return;
            }


            final String hoverInfo = "";

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          return;
      }


      if (sourceViewer instanceof ITextViewerExtension2) {
        // does a text hover exist?
        ITextHover textHover= ((ITextViewerExtension2) sourceViewer).getCurrentTextHover();
        if (textHover != null && makeTextHoverFocusable(sourceViewer, textHover))
          return;
      }


      if (sourceViewer instanceof ISourceViewerExtension3) {

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   *             <code>documentationTextHover</code> element in the
   *             <code>org.eclipse.wst.sse.ui.editorConfiguration</code>
   *             extension point
   */
  protected IInformationProvider getInformationProvider(ISourceViewer sourceViewer, String partitionType) {
    ITextHover bestMatchHover = new BestMatchHover(createDocumentationHovers(partitionType));
    return new TextHoverInformationProvider(bestMatchHover);
  }

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    ITextHover[] hovers = (ITextHover[]) extendedTextHover.toArray(new ITextHover[extendedTextHover.size()]);
    return hovers;
  }


  public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) {
    ITextHover textHover = null;


    /*
     * Returns a default problem, annotation, and best match hover
     * depending on stateMask
     */

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   *             <code>documentationTextHover</code> element in the
   *             <code>org.eclipse.wst.sse.ui.editorConfiguration</code>
   *             extension point
   */
  protected IInformationProvider getInformationProvider(ISourceViewer sourceViewer, String partitionType) {
    ITextHover bestMatchHover = new BestMatchHover(partitionType);
    return new TextHoverInformationProvider(bestMatchHover);
  }

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    ITextHover[] hovers = (ITextHover[]) extendedTextHover.toArray(new ITextHover[extendedTextHover.size()]);
    return hovers;
  }


  public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) {
    ITextHover textHover = null;


    /*
     * Returns a default problem, annotation, and best match hover
     * depending on stateMask
     */

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        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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    // either had no best match hover or best match hover returned null
    if (displayText == null) {
      // go through list of text hovers and return first display string
      Iterator i = getTextHovers().iterator();
      while ((i.hasNext()) && (displayText == null)) {
        ITextHover hover = (ITextHover) i.next();
        displayText = hover.getHoverInfo(viewer, hoverRegion);
      }
    }
    return displayText;
  }

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   */
  public IRegion getHoverRegion(ITextViewer viewer, int offset) {
    IRegion hoverRegion = null;


    // go through list of text hovers and return first hover region
    ITextHover hover = null;
    Iterator i = getTextHovers().iterator();
    while ((i.hasNext()) && (hoverRegion == null)) {
      hover = (ITextHover) i.next();
      hoverRegion = hover.getHoverRegion(viewer, offset);
    }


    // store the text hover processor that found region
    if (hoverRegion != null)
      fBestMatchHover = hover;

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        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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Related Classes of org.eclipse.jface.text.ITextHover

org.eclipse.ui.texteditor.AbstractTextEditor$InformationDispatchAction

org.eclipse.wst.sse.ui.internal.taginfo.BestMatchHover

org.eclipse.wst.sse.ui.StructuredTextEditor

org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration

org.erlide.ui.editors.erl.ShowEDocAction

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