Bug 32038 Use shared images for properties, tasks, bookmarks views
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/tasklist/MarkerUtil.java
public static Image getCompleteImage(IMarker marker) {
		if (isMarkerType(marker, IMarker.TASK)) {
			if (isComplete(marker))
				return getImage("complete_tsk");
			else if (!isReadOnly(marker)) 
				return getImage("incomplete_tsk");
		}
		return null;
	}
	/**
	 * Returns the text to be used for the complete state of a task. 
	 * Returns the empty string for markers that are not tasks.
	 */
	public static String getCompleteText(IMarker marker) {
		if (isMarkerType(marker, IMarker.TASK)) {
			if (isComplete(marker)) 
				return TaskListMessages.getString("TaskList.completed"); 
			else	
				return TaskListMessages.getString("TaskList.notCompleted"); 
		}
		return ""; 
	}
	/**
	 * Returns the text to be used for the kind of marker.
	 */
	public static String getKindText(IMarker marker) {
		if (isMarkerType(marker, IMarker.TASK)) {
			return TaskListMessages.getString("TaskList.task"); 
		}
		switch (getSeverity(marker)) {