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;;; ldg-xact.el --- Helper code for use with the "ledger" command-line tool
;; Copyright (C) 2003-2013 John Wiegley (johnw AT gnu DOT org)
;; This file is not part of GNU Emacs.
;; This is free software; you can redistribute it and/or modify it under
;; the terms of the GNU General Public License as published by the Free
;; Software Foundation; either version 2, or (at your option) any later
;; version.
;;
;; This is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
;; for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
;; MA 02111-1307, USA.
;; A sample entry sorting function, which works if entry dates are of
;; the form YYYY/mm/dd.
(defcustom ledger-highlight-xact-under-point t
"If t highlight xact under point"
:type 'boolean
:group 'ledger)
(defvar highlight-overlay (list))
(defun ledger-find-xact-extents (pos)
"return point for beginning of xact and and of xact containing
position. Requires empty line separating xacts"
(interactive "d")
(save-excursion
(goto-char pos)
(let ((end-pos pos)
(beg-pos pos))
(backward-paragraph)
(forward-line)
(beginning-of-line)
(setq beg-pos (point))
(forward-paragraph)
(forward-line -1)
(end-of-line)
(setq end-pos (1+ (point)))
(list beg-pos end-pos))))
(defun ledger-highlight-xact-under-point ()
(if ledger-highlight-xact-under-point
(let ((exts (ledger-find-xact-extents (point)))
(ovl highlight-overlay))
(if (not highlight-overlay)
(setq ovl
(setq highlight-overlay
(make-overlay (car exts)
(cadr exts)
(current-buffer) t nil)))
(move-overlay ovl (car exts) (cadr exts)))
(overlay-put ovl 'face 'ledger-font-highlight-face)
(overlay-put ovl 'priority 100))))
(provide 'ldg-xact)
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