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;;; ldg-mode.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.
(defsubst ledger-current-year ()
(format-time-string "%Y"))
(defsubst ledger-current-month ()
(format-time-string "%m"))
(defvar ledger-year (ledger-current-year)
"Start a ledger session with the current year, but make it
customizable to ease retro-entry.")
(defvar ledger-month (ledger-current-month)
"Start a ledger session with the current month, but make it
customizable to ease retro-entry.")
(defcustom ledger-default-acct-transaction-indent " "
"Default indentation for account transactions in an entry."
:type 'string
:group 'ledger)
(defvar ledger-mode-abbrev-table)
;;;###autoload
(define-derived-mode ledger-mode text-mode "Ledger"
"A mode for editing ledger data files."
(ledger-check-version)
(ledger-post-setup)
(set (make-local-variable 'comment-start) " ; ")
(set (make-local-variable 'comment-end) "")
(set (make-local-variable 'indent-tabs-mode) nil)
(if (boundp 'font-lock-defaults)
(set (make-local-variable 'font-lock-defaults)
'(ledger-font-lock-keywords nil t)))
(set (make-local-variable 'pcomplete-parse-arguments-function)
'ledger-parse-arguments)
(set (make-local-variable 'pcomplete-command-completion-function)
'ledger-complete-at-point)
(set (make-local-variable 'pcomplete-termination-string) "")
(add-hook 'post-command-hook 'ledger-highlight-xact-under-point nil t)
(make-variable-buffer-local 'highlight-overlay)
(let ((map (current-local-map)))
(define-key map [(control ?c) (control ?a)] 'ledger-add-entry)
(define-key map [(control ?c) (control ?d)] 'ledger-delete-current-entry)
(define-key map [(control ?c) (control ?y)] 'ledger-set-year)
(define-key map [(control ?c) (control ?m)] 'ledger-set-month)
(define-key map [(control ?c) (control ?c)] 'ledger-toggle-current)
(define-key map [(control ?c) (control ?e)] 'ledger-toggle-current-entry)
(define-key map [(control ?c) (control ?r)] 'ledger-reconcile)
(define-key map [(control ?c) (control ?s)] 'ledger-sort-region)
(define-key map [(control ?c) (control ?t)] 'ledger-test-run)
(define-key map [(control ?c) (control ?b)] 'ledger-post-edit-amount)
(define-key map [(control ?c) (control ?f)] 'ledger-occur)
(define-key map [tab] 'pcomplete)
(define-key map [(control ?i)] 'pcomplete)
(define-key map [(control ?c) tab] 'ledger-fully-complete-entry)
(define-key map [(control ?c) (control ?i)] 'ledger-fully-complete-entry)
(define-key map [(control ?c) (control ?o) (control ?r)] 'ledger-report)
(define-key map [(control ?c) (control ?o) (control ?g)] 'ledger-report-goto)
(define-key map [(control ?c) (control ?o) (control ?a)] 'ledger-report-redo)
(define-key map [(control ?c) (control ?o) (control ?s)] 'ledger-report-save)
(define-key map [(control ?c) (control ?o) (control ?e)] 'ledger-report-edit)
(define-key map [(control ?c) (control ?o) (control ?k)] 'ledger-report-kill)
(define-key map [(meta ?p)] 'ledger-post-prev-xact)
(define-key map [(meta ?n)] 'ledger-post-next-xact)
(define-key map [menu-bar] (make-sparse-keymap "ldg-menu"))
(define-key map [menu-bar ldg-menu] (cons "Ledger" map))
(define-key map [report-kill] '(menu-item "Kill Report" ledger-report-kill :enable ledger-works))
(define-key map [report-edit] '(menu-item "Edit Report" ledger-report-edit :enable ledger-works))
(define-key map [report-save] '(menu-item "Save Report" ledger-report-save :enable ledger-works))
(define-key map [report-rrun] '(menu-item "Re-run Report" ledger-report-redo :enable ledger-works))
(define-key map [report-goto] '(menu-item "Goto Report" ledger-report-goto :enable ledger-works))
(define-key map [report-run] '(menu-item "Run Report" ledger-report :enable ledger-works))
(define-key map [sep5] '(menu-item "--"))
(define-key map [set-month] '(menu-item "Set Month" ledger-set-month :enable ledger-works))
(define-key map [set-year] '(menu-item "Set Year" ledger-set-year :enable ledger-works))
(define-key map [cust] '(menu-item "Customize Ledger Mode" (lambda ()
(interactive)
(customize-group 'ledger))))
(define-key map [sep1] '("--"))
(define-key map [sort-buff] '(menu-item "Sort Buffer" ledger-sort-buffer))
(define-key map [sort-reg] '(menu-item "Sort Region" ledger-sort-region :enable mark-active))
(define-key map [sep2] '(menu-item "--"))
(define-key map [toggle-post] '(menu-item "Toggle Current Posting" ledger-toggle-current))
(define-key map [toggle-xact] '(menu-item "Toggle Current Transaction" ledger-toggle-current-entry))
(define-key map [sep4] '(menu-item "--"))
(define-key map [edit-amount] '(menu-item "Calc on Amount" ledger-post-edit-amount))
(define-key map [sep] '(menu-item "--"))
(define-key map [delete-xact] '(menu-item "Delete Entry" ledger-delete-current-entry))
(define-key map [add-xact] '(menu-item "Add Entry" ledger-add-entry :enable ledger-works))
(define-key map [sep3] '(menu-item "--"))
(define-key map [reconcile] '(menu-item "Reconcile Account" ledger-reconcile :enable ledger-works))
(define-key map [reconcile] '(menu-item "Hide Xacts" ledger-occur))))
(defun ledger-time-less-p (t1 t2)
"Say whether time value T1 is less than time value T2."
(or (< (car t1) (car t2))
(and (= (car t1) (car t2))
(< (nth 1 t1) (nth 1 t2)))))
(defun ledger-time-subtract (t1 t2)
"Subtract two time values.
Return the difference in the format of a time value."
(let ((borrow (< (cadr t1) (cadr t2))))
(list (- (car t1) (car t2) (if borrow 1 0))
(- (+ (if borrow 65536 0) (cadr t1)) (cadr t2)))))
(defun ledger-find-slot (moment)
(catch 'found
(ledger-iterate-entries
(function
(lambda (start date mark desc)
(if (ledger-time-less-p moment date)
(throw 'found t)))))))
(defun ledger-iterate-entries (callback)
(goto-char (point-min))
(let* ((now (current-time))
(current-year (nth 5 (decode-time now))))
(while (not (eobp))
(when (looking-at
(concat "\\(Y\\s-+\\([0-9]+\\)\\|"
"\\([0-9]\\{4\\}+\\)?[./]?"
"\\([0-9]+\\)[./]\\([0-9]+\\)\\s-+"
"\\(\\*\\s-+\\)?\\(.+\\)\\)"))
(let ((found (match-string 2)))
(if found
(setq current-year (string-to-number found))
(let ((start (match-beginning 0))
(year (match-string 3))
(month (string-to-number (match-string 4)))
(day (string-to-number (match-string 5)))
(mark (match-string 6))
(desc (match-string 7)))
(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))))
(defun ledger-set-year (newyear)
"Set ledger's idea of the current year to the prefix argument."
(interactive "p")
(if (= newyear 1)
(setq ledger-year (read-string "Year: " (ledger-current-year)))
(setq ledger-year (number-to-string newyear))))
(defun ledger-set-month (newmonth)
"Set ledger's idea of the current month to the prefix argument."
(interactive "p")
(if (= newmonth 1)
(setq ledger-month (read-string "Month: " (ledger-current-month)))
(setq ledger-month (format "%02d" newmonth))))
(defun ledger-add-entry (entry-text &optional insert-at-point)
(interactive (list
(read-string "Entry: " (concat ledger-year "/" ledger-month "/"))))
(let* ((args (with-temp-buffer
(insert entry-text)
(eshell-parse-arguments (point-min) (point-max))))
(ledger-buf (current-buffer))
exit-code)
(unless insert-at-point
(let ((date (car args)))
(if (string-match "\\([0-9]+\\)/\\([0-9]+\\)/\\([0-9]+\\)" date)
(setq date
(encode-time 0 0 0 (string-to-number (match-string 3 date))
(string-to-number (match-string 2 date))
(string-to-number (match-string 1 date)))))
(ledger-find-slot date)))
(if (> (length args) 1)
(save-excursion
(insert
(with-temp-buffer
(setq exit-code
(apply #'ledger-exec-ledger ledger-buf ledger-buf "entry"
(mapcar 'eval args)))
(goto-char (point-min))
(if (looking-at "Error: ")
(error (buffer-string))
(buffer-string)))
"\n"))
(progn
(insert (car args) " \n\n")
(end-of-line -1)))))
(defun ledger-current-entry-bounds ()
(save-excursion
(when (or (looking-at "^[0-9]")
(re-search-backward "^[0-9]" nil t))
(let ((beg (point)))
(while (not (eolp))
(forward-line))
(cons (copy-marker beg) (point-marker))))))
(defun ledger-delete-current-entry ()
(interactive)
(let ((bounds (ledger-current-entry-bounds)))
(delete-region (car bounds) (cdr bounds))))
(provide 'ldg-mode)
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