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
IEclipsePreferences prefs = NavigatorContentService.getPreferencesRoot();
		prefs.remove(getFilterActivationPreferenceKey());
		NavigatorContentService.flushPreferences(prefs);
	}
	/**
	 * @return The correct filter activation preference key for the
	 *         corresponding content service.
	 */
	private String getFilterActivationPreferenceKey() {
		return contentService.getViewerId() + ACTIVATION_KEY;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.INavigatorFilterService#getVisibleFilters(boolean)
	 */
	public ViewerFilter[] getVisibleFilters(boolean toReturnOnlyActiveFilters) {
		CommonFilterDescriptor[] descriptors = CommonFilterDescriptorManager
				.getInstance().findVisibleFilters(contentService);
		List filters = new ArrayList();
		ViewerFilter instance;
		for (int i = 0; i < descriptors.length; i++) {
			if (!toReturnOnlyActiveFilters || isActive(descriptors[i].getId())) {
				instance = getViewerFilter(descriptors[i]);
				if (instance != null) {
					filters.add(instance);
				}
			}
		}