/**
* Called on the viewer disposal. Unregisters from the compare configuration. Clients may extend
* if they have to do additional cleanup.
*
* @see org.eclipse.jface.viewers.ContentViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
*/
protected void handleDispose(DisposeEvent event) {
if (fHandlerService != null) fHandlerService.dispose();
Object input = getInput();
if (input instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.removeCompareInputChangeListener(
(ICompareInput) input, fCompareInputChangeListener);
}
if (input != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.removeListener(labelChangeListener);
}
if (fPropertyChangeListener != null) {
fCompareConfiguration.removePropertyChangeListener(fPropertyChangeListener);
fPropertyChangeListener = null;
}
fAncestorLabel = null;
fLeftLabel = null;
fDirectionLabel = null;
fRightLabel = null;
fCenter = null;
if (fRightArrow != null) {
fRightArrow.dispose();
fRightArrow = null;
}
if (fLeftArrow != null) {
fLeftArrow.dispose();
fLeftArrow = null;
}
if (fBothArrow != null) {
fBothArrow.dispose();
fBothArrow = null;
}
if (fNormalCursor != null) {
fNormalCursor.dispose();
fNormalCursor = null;
}
if (fHSashCursor != null) {
fHSashCursor.dispose();
fHSashCursor = null;
}
if (fVSashCursor != null) {
fVSashCursor.dispose();
fVSashCursor = null;
}
if (fHVSashCursor != null) {
fHVSashCursor.dispose();
fHVSashCursor = null;
}
super.handleDispose(event);
}
/**
* The <code>ContentMergeViewer</code> implementation of this <code>ContentViewer</code> method
* checks to ensure that the content provider is an <code>IMergeViewerContentProvider</code>.
*
* @param contentProvider the content provider to set. Must implement IMergeViewerContentProvider.
*/
public void setContentProvider(IContentProvider contentProvider) {
Assert.isTrue(contentProvider instanceof IMergeViewerContentProvider);
super.setContentProvider(contentProvider);
}