01c91130d7
This began with noticing that the code didn't support the (ugly, yet valid) case of a tab between the date and txn description. I took the opportunity to make the regexes more consistent along the way.
194 lines
7.5 KiB
EmacsLisp
194 lines
7.5 KiB
EmacsLisp
;;; ledger-fontify.el --- Provide custom fontification for ledger-mode
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;; Copyright (C) 2014 Craig P. Earls (enderw88 at gmail dot com)
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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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;; Font-lock-mode doesn't handle multiline syntax very well. This
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;; code provides font lock that is sensitive to overall transaction
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;; states
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;;; Code:
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(provide 'ledger-fontify)
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(defcustom ledger-fontify-xact-state-overrides nil
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"If t the highlight entire xact with state."
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:type 'boolean
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:group 'ledger)
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(defun ledger-fontify-buffer-part (&optional beg end len)
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"Fontify buffer from BEG to END, length LEN."
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(save-excursion
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(unless beg (setq beg (point-min)))
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(unless end (setq end (point-max)))
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(beginning-of-line)
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(while (< (point) end)
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(cond ((or (looking-at ledger-xact-start-regex)
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(looking-at ledger-posting-regex))
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(ledger-fontify-xact-at (point)))
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((looking-at ledger-directive-start-regex)
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(ledger-fontify-directive-at (point))))
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(ledger-navigate-next-xact-or-directive))))
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(defun ledger-fontify-xact-at (position)
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"Fontify the xact at POS."
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(interactive "d")
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(save-excursion
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(goto-char position)
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(let ((extents (ledger-navigate-find-element-extents position))
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(state (ledger-transaction-state)))
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(if (and ledger-fontify-xact-state-overrides state)
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(cond ((eq state 'cleared)
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(ledger-fontify-set-face extents 'ledger-font-xact-cleared-face))
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((eq state 'pending)
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(ledger-fontify-set-face extents 'ledger-font-xact-pending-face)))
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(ledger-fontify-xact-by-line extents)))))
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(defun ledger-fontify-xact-by-line (extents)
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"Do line-by-line detailed fontification of xact in EXTENTS."
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(save-excursion
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(ledger-fontify-xact-start (car extents))
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(while (< (point) (cadr extents))
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(if (looking-at "[ \t]+;")
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(ledger-fontify-set-face (list (point) (progn
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(end-of-line)
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(point))) 'ledger-font-comment-face)
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(ledger-fontify-posting (point)))
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(forward-line))))
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(defun ledger-fontify-xact-start (pos)
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"POS should be at the beginning of a line starting an xact.
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Fontify the first line of an xact"
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(goto-char pos)
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(let ((line-start (line-beginning-position)))
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(goto-char line-start)
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(re-search-forward "[ \t]")
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(ledger-fontify-set-face (list line-start (match-beginning 0)) 'ledger-font-posting-date-face)
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(goto-char line-start)
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(re-search-forward ledger-xact-after-date-regex)
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(let ((state (save-match-data (ledger-state-from-string (match-string 1)))))
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(ledger-fontify-set-face (list (match-beginning 3) (match-end 3))
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(cond ((eq state 'pending)
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'ledger-font-payee-pending-face)
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((eq state 'cleared)
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'ledger-font-payee-cleared-face)
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(t
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'ledger-font-payee-uncleared-face))))
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(when (match-beginning 4)
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(ledger-fontify-set-face (list (match-beginning 4)
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(match-end 4)) 'ledger-font-comment-face))
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(forward-line)))
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(defun ledger-fontify-posting (pos)
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"Fontify the posting at POS."
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(let* ((state nil)
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(end-of-line-comment nil)
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(end (progn (end-of-line)
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(point)))
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(start (progn (beginning-of-line)
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(point))))
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;; Look for a posting status flag
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(set-match-data nil 'reseat)
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(re-search-forward " \\([*!]\\) " end t)
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(if (match-string 1)
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(setq state (ledger-state-from-string (match-string 1))))
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(beginning-of-line)
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(re-search-forward "[[:graph:]]\\([ \t][ \t]\\)" end 'end) ;; find the end of the account, or end of line
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(when (<= (point) end) ;; we are still on the line
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(ledger-fontify-set-face (list start (point))
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(cond ((eq state 'cleared)
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'ledger-font-posting-account-cleared-face)
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((eq state 'pending)
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'ledger-font-posting-account-pending-face)
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(t
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'ledger-font-posting-account-face)))
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(when (< (point) end) ;; there is still more to fontify
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(setq start (point)) ;; update start of next font region
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(setq end-of-line-comment (re-search-forward ";" end 'end)) ;; find the end of the line, or start of a comment
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(ledger-fontify-set-face (list start (point) )
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(cond ((eq state 'cleared)
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'ledger-font-posting-amount-cleared-face)
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((eq state 'pending)
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'ledger-font-posting-amount-pending-face)
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(t
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'ledger-font-posting-amount-face)))
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(when end-of-line-comment
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(setq start (point))
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(end-of-line)
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(ledger-fontify-set-face (list (- start 1) (point)) ;; subtract 1 from start because we passed the semi-colon
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'ledger-font-comment-face))))))
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(defun ledger-fontify-directive-at (pos)
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"Fontify the directive at POS."
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(let ((extents (ledger-navigate-find-element-extents pos))
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(face 'ledger-font-default-face))
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(cond ((looking-at "=")
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(setq face 'ledger-font-auto-xact-face))
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((looking-at "~")
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(setq face 'ledger-font-periodic-xact-face))
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((looking-at "[;#%|\\*]")
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(setq face 'ledger-font-comment-face))
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((looking-at "\\(year\\)\\|Y")
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(setq face 'ledger-font-year-directive-face))
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((looking-at "account")
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(setq face 'ledger-font-account-directive-face))
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((looking-at "apply")
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(setq face 'ledger-font-apply-directive-face))
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((looking-at "alias")
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(setq face 'ledger-font-alias-directive-face))
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((looking-at "assert")
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(setq face 'ledger-font-assert-directive-face))
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((looking-at "\\(bucket\\)\\|A")
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(setq face 'ledger-font-bucket-directive-face))
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((looking-at "capture")
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(setq face 'ledger-font-capture-directive-face))
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((looking-at "check")
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(setq face 'ledger-font-check-directive-face))
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((looking-at "commodity")
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(setq face 'ledger-font-commodity-directive-face))
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((looking-at "define")
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(setq face 'ledger-font-define-directive-face))
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((looking-at "end")
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(setq face 'ledger-font-end-directive-face))
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((looking-at "expr")
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(setq face 'ledger-font-expr-directive-face))
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((looking-at "fixed")
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(setq face 'ledger-font-fixed-directive-face))
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((looking-at "include")
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(setq face 'ledger-font-include-directive-face))
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((looking-at "payee")
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(setq face 'ledger-font-payee-directive-face))
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((looking-at "P")
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(setq face 'ledger-font-price-directive-face))
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((looking-at "tag")
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(setq face 'ledger-font-tag-directive-face)))
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(ledger-fontify-set-face extents face)))
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(defun ledger-fontify-set-face (extents face)
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"Set the text in EXTENTS to FACE."
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(put-text-property (car extents) (cadr extents) 'face face))
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;;; ledger-fontify.el ends here
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