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/filters/UpdateActiveFiltersOperation.java
private String[] filterIdsToActivate; 
	private final CommonViewer commonViewer;
	private final INavigatorContentService contentService;
	private boolean disableTheComplement;
	/**
	 * Create an operation to activate extensions and refresh the viewer.
	 * 
	 * 
	 * @param aCommonViewer
	 *            The CommonViewer instance to update
	 * @param theActiveFilterIds
	 *            An array of ids that correspond to the filters that should be
	 *            in the <i>active</i> state after this operation executes. The
	 *            complement of this set will likewise be in the <i>inactive</i>
	 *            state after this operation executes.
	 *            @param toDisableTheComplement True indicates that all filters not in the set should be made inactive.
	 */
	public UpdateActiveFiltersOperation(CommonViewer aCommonViewer,
			String[] theActiveFilterIds, boolean toDisableTheComplement) {
		super(
				CommonNavigatorMessages.UpdateFiltersOperation_Update_CommonViewer_Filter_);
		Assert.isNotNull(theActiveFilterIds);
		
		commonViewer = aCommonViewer;
		contentService = commonViewer.getNavigatorContentService();
		filterIdsToActivate = theActiveFilterIds;
		disableTheComplement = toDisableTheComplement;
	}
	/*
	 * (non-Javadoc)