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lisp/ledger-mode/ledger-state.el
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259
lisp/ledger-mode/ledger-state.el
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;;; ledger-state.el --- Helper code for use with the "ledger" command-line tool -*- lexical-binding: t; -*-
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;; Copyright (C) 2003-2016 John Wiegley (johnw AT gnu DOT org)
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;; This file is not part of GNU Emacs.
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;; This is free software; you can redistribute it and/or modify it under
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;; the terms of the GNU General Public License as published by the Free
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;; Software Foundation; either version 2, or (at your option) any later
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;; version.
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;;
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;; This is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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;; for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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;; MA 02110-1301 USA.
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;;; Commentary:
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;; Utilities for dealing with transaction and posting status.
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;;; Code:
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(require 'ledger-navigate)
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(require 'ledger-context)
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(defcustom ledger-clear-whole-transactions nil
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"If non-nil, clear whole transactions, not individual postings."
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:type 'boolean
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:group 'ledger)
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(defun ledger-transaction-state ()
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"Return the state of the transaction at point."
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(save-excursion
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(when (or (looking-at "^[0-9]")
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(re-search-backward "^[0-9]" nil t))
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(skip-chars-forward "0-9./=\\-")
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(skip-syntax-forward " ")
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(cond ((looking-at "!\\s-*") 'pending)
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((looking-at "\\*\\s-*") 'cleared)
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(t nil)))))
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(defun ledger-posting-state ()
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"Return the state of the posting."
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(save-excursion
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(goto-char (line-beginning-position))
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(skip-syntax-forward " ")
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(cond ((looking-at "!\\s-*") 'pending)
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((looking-at "\\*\\s-*") 'cleared)
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(t (ledger-transaction-state)))))
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(defun ledger-char-from-state (state)
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"Return the char representation of STATE."
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(if state
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(if (eq state 'pending)
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"!"
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"*")
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""))
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(defun ledger-state-from-char (state-char)
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"Get state from STATE-CHAR."
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(cond ((eql state-char ?\!) 'pending)
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((eql state-char ?\*) 'cleared)
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((eql state-char ?\;) 'comment)
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(t nil)))
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(defun ledger-state-from-string (state-string)
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"Get state from STATE-STRING."
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(when state-string
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(cond
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((string-match "!" state-string) 'pending)
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((string-match "\\*" state-string) 'cleared)
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((string-match ";" state-string) 'comment)
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(t nil))))
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(defun ledger-toggle-current-posting (&optional style)
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"Toggle the cleared status of the transaction under point.
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Optional argument STYLE may be `pending' or `cleared', depending
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on which type of status the caller wishes to indicate (default is
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`cleared'). Returns the new status as 'pending 'cleared or nil.
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This function is rather complicated because it must preserve both
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the overall formatting of the ledger xact, as well as ensuring
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that the most minimal display format is used. This could be
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achieved more certainly by passing the xact to ledger for
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formatting, but doing so causes inline math expressions to be
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dropped."
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(interactive)
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(let ((bounds (ledger-navigate-find-xact-extents (point)))
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new-status cur-status)
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;; Uncompact the xact, to make it easier to toggle the
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;; transaction
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(save-excursion ;; this excursion checks state of entire
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;; transaction and unclears if marked
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(goto-char (car bounds)) ;; beginning of xact
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(skip-chars-forward "0-9./=\\-") ;; skip the date
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(skip-chars-forward " \t") ;; skip the white space after the date
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(setq cur-status (and (member (char-after) '(?\* ?\!))
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(ledger-state-from-char (char-after))))
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;;if cur-status if !, or * then delete the marker
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(when cur-status
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(let ((here (point)))
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(skip-chars-forward "*! ")
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(let ((width (- (point) here)))
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(when (> width 0)
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(delete-region here (point))
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(if (search-forward " " (line-end-position) t)
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(insert (make-string width ? ))))))
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(forward-line)
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;; Shift the cleared/pending status to the postings
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(while (looking-at "[ \t]")
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(skip-chars-forward " \t")
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(when (not (eq (ledger-state-from-char (char-after)) 'comment))
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(insert (ledger-char-from-state cur-status) " ")
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(if (and (search-forward " " (line-end-position) t)
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(looking-at " "))
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(delete-char 2)))
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(forward-line))
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(setq new-status nil)))
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;;this excursion toggles the posting status
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(save-excursion
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(setq inhibit-modification-hooks t)
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(goto-char (line-beginning-position))
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(when (looking-at "[ \t]")
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(skip-chars-forward " \t")
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(let ((here (point))
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(cur-status (ledger-state-from-char (char-after))))
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(skip-chars-forward "*! ")
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(let ((width (- (point) here)))
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(when (> width 0)
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(delete-region here (point))
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(save-excursion
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(if (search-forward " " (line-end-position) t)
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(insert (make-string width ? ))))))
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(let (inserted)
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(if cur-status
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(if (and style (eq style 'cleared))
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(progn
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(insert "* ")
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(setq inserted 'cleared)))
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(if (and style (eq style 'pending))
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(progn
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(insert "! ")
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(setq inserted 'pending))
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(progn
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(insert "* ")
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(setq inserted 'cleared))))
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(if (and inserted
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(re-search-forward "\\(\t\\| [ \t]\\)"
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(line-end-position) t))
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(cond
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((looking-at "\t")
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(delete-char 1))
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((looking-at " [ \t]")
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(delete-char 2))
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((looking-at " ")
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(delete-char 1))))
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(setq new-status inserted))))
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(setq inhibit-modification-hooks nil))
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;; This excursion cleans up the xact so that it displays
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;; minimally. This means that if all posts are cleared, remove
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;; the marks and clear the entire transaction.
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(save-excursion
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(goto-char (car bounds))
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(forward-line)
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(let ((first t)
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(state nil)
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(hetero nil))
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(while (and (not hetero) (looking-at "[ \t]"))
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(skip-chars-forward " \t")
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(let ((cur-status (ledger-state-from-char (char-after))))
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(if (not (eq cur-status 'comment))
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(if first
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(setq state cur-status
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first nil)
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(if (not (eq state cur-status))
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(setq hetero t)))))
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(forward-line))
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(when (and (not hetero) (not (eq state nil)))
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(goto-char (car bounds))
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(forward-line)
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(while (looking-at "[ \t]")
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(skip-chars-forward " \t")
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(let ((here (point)))
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(skip-chars-forward "*! ")
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(let ((width (- (point) here)))
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(when (> width 0)
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(delete-region here (point))
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(if (re-search-forward "\\(\t\\| [ \t]\\)"
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(line-end-position) t)
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(insert (make-string width ? ))))))
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(forward-line))
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(goto-char (car bounds))
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(skip-chars-forward "0-9./=\\-") ;; Skip the date
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(skip-chars-forward " \t") ;; Skip the white space
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(insert (ledger-char-from-state state) " ")
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(setq new-status state)
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(if (re-search-forward "\\(\t\\| [ \t]\\)"
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(line-end-position) t)
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(cond
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((looking-at "\t")
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(delete-char 1))
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((looking-at " [ \t]")
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(delete-char 2))
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((looking-at " ")
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(delete-char 1)))))))
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new-status))
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(defun ledger-toggle-current (&optional style)
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"Toggle the current thing at point with optional STYLE."
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(interactive)
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(if (or ledger-clear-whole-transactions
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(eq 'transaction (ledger-thing-at-point)))
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(progn
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(save-excursion
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(forward-line)
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(goto-char (line-beginning-position))
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(while (and (not (eolp))
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(save-excursion
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(not (eq 'transaction (ledger-thing-at-point)))))
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(if (looking-at "\\s-+[*!]")
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(ledger-toggle-current-posting style))
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(forward-line)
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(goto-char (line-beginning-position))))
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(ledger-toggle-current-transaction style))
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(ledger-toggle-current-posting style)))
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(defun ledger-toggle-current-transaction (&optional style)
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"Toggle the transaction at point using optional STYLE."
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(interactive)
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(save-excursion
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(when (or (looking-at "^[0-9]")
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(re-search-backward "^[0-9]" nil t))
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(skip-chars-forward "0-9./=\\-")
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(delete-horizontal-space)
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(if (or (eq (ledger-state-from-char (char-after)) 'pending)
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(eq (ledger-state-from-char (char-after)) 'cleared))
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(progn
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(delete-char 1)
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(when (and style (eq style 'cleared))
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(insert " *")
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'cleared))
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(if (and style (eq style 'pending))
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(progn
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(insert " ! ")
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'pending)
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(progn
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(insert " * ")
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'cleared))))))
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(provide 'ledger-state)
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;;; ledger-state.el ends here
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