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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.
;;; Commentary:
;; Utilities for running ledger synchronously.
;;; Code:
(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. Argument POS is a location
within the transaction."
(interactive "d")
(save-excursion
(goto-char pos)
(let ((end-pos pos)
(beg-pos pos))
(backward-paragraph)
(if (/= (point) (point-min))
(forward-line))
(setq beg-pos (line-beginning-position))
(forward-paragraph)
(forward-line -1)
(setq end-pos (1+ (line-end-position)))
(list beg-pos end-pos))))
(defun ledger-highlight-xact-under-point ()
"Move the highlight overlay to the current transaction."
(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-xact-highlight-face)
(overlay-put ovl 'priority 100))))
(defun ledger-xact-payee ()
"Return the payee of the transaction containing point or nil."
(let ((i 0))
(while (eq (ledger-context-line-type (ledger-context-other-line i)) 'acct-transaction)
(setq i (- i 1)))
(let ((context-info (ledger-context-other-line i)))
(if (eq (ledger-context-line-type context-info) 'xact)
(ledger-context-field-value context-info 'payee)
nil))))
(defun ledger-xact-find-slot (moment)
"Find the right place in the buffer for a transaction at MOMENT.
MOMENT is an encoded date"
(catch 'found
(ledger-xact-iterate-transactions
(function
(lambda (start date mark desc)
(if (ledger-time-less-p moment date)
(throw 'found t)))))))
(defun ledger-xact-iterate-transactions (callback)
"Iterate through each transaction call CALLBACK for each."
(goto-char (point-min))
(let* ((now (current-time))
(current-year (nth 5 (decode-time now))))
(while (not (eobp))
(when (looking-at ledger-iterate-regex)
(let ((found-y-p (match-string 2)))
(if found-y-p
(setq current-year (string-to-number found-y-p)) ;; a Y directive was found
(let ((start (match-beginning 0))
(year (match-string 4))
(month (string-to-number (match-string 5)))
(day (string-to-number (match-string 6)))
(mark (match-string 7))
(code (match-string 8))
(desc (match-string 9)))
(if (and year (> (length year) 0))
(setq year (string-to-number year)))
(funcall callback start
(encode-time 0 0 0 day month
(or year current-year))
mark desc)))))
(forward-line))))
(defsubst ledger-goto-line (line-number)
"Rapidly move point to line LINE-NUMBER."
(goto-char (point-min))
(forward-line (1- line-number)))
(defun ledger-copy-transaction-at-point (date)
"Ask for a new DATE and copy the transaction under point to that date. Leave point on the first amount."
(interactive (list
(read-string "Copy to date: "
(concat ledger-year "/" ledger-month "/") 'ledger-minibuffer-history)))
(let* ((here (point))
(extents (ledger-find-xact-extents (point)))
(transaction (buffer-substring-no-properties (car extents) (cadr extents)))
encoded-date)
(if (string-match ledger-iso-date-regexp date)
(setq encoded-date
(encode-time 0 0 0 (string-to-number (match-string 4 date))
(string-to-number (match-string 3 date))
(string-to-number (match-string 2 date)))))
(ledger-xact-find-slot encoded-date)
(insert transaction "\n")
(backward-paragraph 2)
(re-search-forward ledger-iso-date-regexp)
(replace-match date)
(ledger-next-amount)))
(provide 'ldg-xact)
;;; ldg-xact.el ends here
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