Tab advance for tabulated-list-mode [CODE ATTACHED]

[Boruch Baum <boruch_baum@gmx.com>]

Tabulated-list-mode provides for sorting by column at POINT, but not for
navigating by column to quickly get to the column one wishes to sort.
The following code provides that feature.


(defun tabulated-list-tab-backward (&optional n)
  "Navigated N column entries backward in tabulated listing.
Default is to advance one column."
  (interactive "p")
  (crossword-summary-tab-forward (- n)))

(defun tabulated-list-tab-forward (&optional n)
  "Navigate N column entries forward in tabulated listing.
Default is to advance one column."
  (interactive "p")
  (let* ((direction (if (< 0 n)
                      'next-single-property-change
                     (setq n (- n))
                     'previous-single-property-change))
         (pos (point))
         N)
    (dotimes (N n)
      (if (not pos)
        (setq N n)
       (while (and (setq pos (funcall direction pos 'tabulated-list-column-name))
                   (not (get-text-property pos 'tabulated-list-entry))))))
    (goto-char (or pos (if (eq direction 'next-property-change)
                         (point-max)
                        (point-min))))))

(define-key tabulated-list-mode-map "\t"              'tabulated-list-tab-forward)
(define-key tabulated-list-mode-map (kbd "<backtab>") 'tabulated-list-tab-backward)



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