org.eclipse.jface.text.TextEvent#getViewerRedrawState ( )源码实例Demo

public void textChanged(TextEvent event) {

			fCachedRedrawState= event.getViewerRedrawState();
			if (!fCachedRedrawState)
				return;

			if (updateNumberOfDigits()) {
				computeIndentations();
				layout(event.getViewerRedrawState());
				return;
			}

			boolean viewerCompletelyShown= isViewerEntirelyShown();
			if (viewerCompletelyShown || fSensitiveToTextChanges || event.getDocumentEvent() == null)
				doPostRedraw();
			fSensitiveToTextChanges= viewerCompletelyShown;
		}
 

public void textChanged(TextEvent event) {

            fCachedRedrawState= event.getViewerRedrawState();
            if (!fCachedRedrawState)
                return;

            postRedraw();
        }
 

@Override
public void textChanged(TextEvent event) {
	if (!event.getViewerRedrawState())
		return;
	updatePopupLocation(false);
	updateVisibility(); //only for hiding outside editor area
}
 

@Override
public void textChanged(TextEvent e) {
    if (fTextViewer != null && e.getDocumentEvent() == null && e.getViewerRedrawState()) {
        // handle only changes of visible document
        redraw();
    }
}
 

@Override
public void textChanged(TextEvent e) {
	if (!e.getViewerRedrawState()) {
		return;
	}
	// changed text: propagate previous style, which will be overridden
	// later asynchronously by TM
	if (e.getDocumentEvent() != null) {
		int diff = e.getText().length() - e.getLength();
		if (diff == 0 || e.getOffset() <= 0) {
			return;
		}
		StyleRange range = viewer.getTextWidget().getStyleRangeAtOffset(e.getOffset() - 1);
		if (range == null) {
			return;
		}
		range.length = Math.max(0, range.length + diff);
		viewer.getTextWidget().setStyleRange(range);
		return;
	}

	// TextViewer#invalidateTextPresentation is called (because
	// of validation, folding, etc)
	// case 2), do the colorization.
	IDocument document = viewer.getDocument();
	if (document == null) {
		return;
	}
	IRegion region = computeRegionToRedraw(e, document);
	if (enabled) {
		// case where there is grammar & theme -> update text presentation with the
		// grammar tokens
		ITMModel model = getTMModelManager().connect(document);
		if (model == null) {
			return;
		}
		try {
			TMPresentationReconciler.this.colorize(region, (TMDocumentModel) model);
		} catch (BadLocationException e1) {
			TMUIPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, TMUIPlugin.PLUGIN_ID, e1.getMessage(), e1));
		}
	} else {
		// case where there is no grammar & theme -> update text presentation with the
		// default styles (ex: to support highlighting with GenericEditor)
		TextPresentation presentation = new TextPresentation(region, 100);
		presentation.setDefaultStyleRange(
				new StyleRange(region.getOffset(), region.getLength(), null, null));
		applyTextRegionCollection(presentation);
	}
}
 

public void textChanged(TextEvent event) {
	if (!event.getViewerRedrawState())
		return;
	updatePopupLocation(false);
	updateVisibility(); //only for hiding outside editor area
}