Bug 109041 [implementation] Occurrence finders should not compute current node each time
I20050906-1200 This is a minor performance improvement item: currently each occurrence finder computes the node at the caret location via NodeFinder. It would be more efficient to compute the node once and initialize each occurrence finder with that node.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
*
		 * @param position Position where the action should move the caret
		 */
		protected abstract void setCaretPosition(int position);
	}
	/**
	 * Text navigation action to navigate to the previous sub-word.
	 *
	 * @since 3.0
	 */
	protected class NavigatePreviousSubWordAction extends PreviousSubWordAction {
		/**
		 * Creates a new navigate previous sub-word action.
		 */
		public NavigatePreviousSubWordAction() {
			super(ST.WORD_PREVIOUS);
		}
		/*
		 * @see org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.PreviousSubWordAction#setCaretPosition(int)
		 */
		protected void setCaretPosition(final int position) {
			getTextWidget().setCaretOffset(modelOffset2WidgetOffset(getSourceViewer(), position));
		}
	}
	/**
	 * Text operation action to delete the previous sub-word.
	 *
	 * @since 3.0
	 */
	protected class DeletePreviousSubWordAction extends PreviousSubWordAction implements IUpdate {