Bug 108102 [Viewers] Project expands in wrong working set
I am using "Show->Working Sets" in the package explorer. Some of the working sets contain the same project: Working Set-1: - Project-A - Project-B - Project-C Working Set-2: - Project-B - Project-C - Project-D If I now double-click "Working Set-1.Project-B" "Project-B" in working set "Working Set-2" will be expanded. If the working set "Working Set-2" itself is not expanded it will seem as if nothing happens, but after expanding "Working Set-2" one can see the changed state of the project. Double-clicking "Working Set-2.Project-B" works as expected.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
protected boolean usingElementMap() {
		return elementMap != null;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ContentViewer#setLabelProvider(org.eclipse.jface.viewers.IBaseLabelProvider)
	 */
	public void setLabelProvider(IBaseLabelProvider labelProvider) {
		if (labelProvider instanceof IColorProvider || labelProvider instanceof IFontProvider) {
			colorAndFontCollector = new ColorAndFontCollectorWithProviders(labelProvider);
		} else {
			colorAndFontCollector = new ColorAndFontCollector();
		}
		super.setLabelProvider(labelProvider);
		
	}
	
	/**
	 * Build a label up for the element using the supplied label provider.
	 * @param updateLabel The ViewerLabel to collect the result in
	 * @param element The element being decorated.
	 */
	protected void buildLabel(ViewerLabel updateLabel, Object element){
		if (getLabelProvider() instanceof IViewerLabelProvider) {
			IViewerLabelProvider itemProvider = (IViewerLabelProvider) getLabelProvider();
			itemProvider.updateLabel(updateLabel, element);
            		
			colorAndFontCollector.setUsedDecorators();
			
			if(updateLabel.hasNewBackground()) {
				colorAndFontCollector.setBackground(updateLabel.getBackground());