/**
* Internal hook method called when the input to this viewer is initially set or subsequently
* changed.
*
* <p>The <code>ContentMergeViewer</code> implementation of this <code>Viewer</code> method tries
* to save the old input by calling <code>doSave(...)</code> and then calls <code>
* internalRefresh(...)</code> .
*
* @param input the new input of this viewer, or <code>null</code> if there is no new input
* @param oldInput the old input element, or <code>null</code> if there was previously no input
*/
protected final void inputChanged(Object input, Object oldInput) {
if (input != oldInput && oldInput != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.removeListener(labelChangeListener);
}
if (input != oldInput && oldInput instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.removeCompareInputChangeListener(
(ICompareInput) oldInput, fCompareInputChangeListener);
}
boolean success = doSave(input, oldInput);
if (input != oldInput && input instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.addCompareInputChangeListener((ICompareInput) input, fCompareInputChangeListener);
}
if (input != oldInput && input != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.addListener(labelChangeListener);
}
if (success) {
setLeftDirty(false);
setRightDirty(false);
}
if (input != oldInput) internalRefresh(input);
}
/**
* 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);
}