Bug 292813 [CommonNavigator] Please provide an API for enabling and disabling common navigator filters programmatically
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.27 Safari/532.0 Build Identifier: M20090917-0800 Recently I had a case where I wanted to enable/disable a common navigator filter from code and found it very difficult. I basically ended up using the code in org.eclipse.ui.internal.navigator.filters.UpdateActiveFiltersOperation as a reference and ended up manually creating or pruning an array, as well as adding/removing a corresponding ViewerFilter to/from and refreshing the underlying viewer. This seems quite complicated and I think others could benefit from it being API similar to how API was recently added to enable and disable content contributions (via INavigatorContentService#activateExtensions and INavigatorContentService#deactivateExtensions). Reproducible: Always
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorFilterService.java
filters.addAll(enforcedViewerFilters);
		if (filters.size() == 0) {
			return NO_FILTERS;
		}
		return (ViewerFilter[]) filters
				.toArray(new ViewerFilter[filters.size()]);
	}
	/**
	 * @param descriptor
	 *            A key into the viewerFilters map.
	 * @return A non-null ViewerFilter from the extension (or
	 *         {@link SkeletonViewerFilter#INSTANCE}).
	 */
	public ViewerFilter getViewerFilter(ICommonFilterDescriptor descriptor) {
		ViewerFilter filter = null;
		synchronized (declaredViewerFilters) {
			filter = (ViewerFilter) declaredViewerFilters.get(descriptor);
			if (filter == null) {
				declaredViewerFilters.put(descriptor,
						(filter = ((CommonFilterDescriptor) descriptor)
								.createFilter()));
			}
		}
		return filter;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.INavigatorFilterService#getVisibleFilterIds()
	 */