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/CommonFilterSelectionDialog.java
extensionsTabItem.setImage(NavigatorPlugin.getDefault().getImage(imageKey));
 		return extensionsTabItem;
	}
	private void createDescriptionText(Composite composite) {
		descriptionText = new Label(composite, SWT.WRAP);
		descriptionText.setFont(composite.getFont());
		descriptionText.setBackground(composite.getBackground());
		GridData descriptionTextGridData = new GridData(GridData.FILL, GridData.BEGINNING, true, false);
		descriptionTextGridData.heightHint = convertHeightInCharsToPixels(3);
		descriptionText.setLayoutData(descriptionTextGridData);
	}
	private ISelectionChangedListener getSelectionListener() {
		if (updateDescriptionSelectionListener == null) {
			updateDescriptionSelectionListener = new FilterDialogSelectionListener(
					descriptionText);
		}
		return updateDescriptionSelectionListener;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()
	 */
	protected void okPressed() {
		if (contentExtensionsTab != null) {
			List checkedExtensions = new ArrayList();
			TableItem[] tableItems = contentExtensionsTab.getTable().getItems();
			INavigatorContentDescriptor descriptor;
			for (int i = 0; i < tableItems.length; i++) {
				descriptor = (INavigatorContentDescriptor) tableItems[i]