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;;; ledger-fontify.el --- Provide custom fontification for ledger-mode -*- lexical-binding: t; -*-
;; Copyright (C) 2014 Craig P. Earls (enderw88 at gmail dot com)
;; 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., 51 Franklin Street, Fifth Floor, Boston,
;; MA 02110-1301 USA.
;;; Commentary:
;; Font-lock-mode doesn't handle multiline syntax very well. This
;; code provides font lock that is sensitive to overall transaction
;; states
;;; Code:
(require 'ledger-navigate)
(require 'ledger-regex)
(require 'ledger-state)
;; These are dynamically bound, see `font-lock-extend-region-functions'.
(defvar font-lock-beg)
(defvar font-lock-end)
(defcustom ledger-fontify-xact-state-overrides nil
"If t the highlight entire xact with state."
:type 'boolean
:group 'ledger)
(defun ledger-fontify-extend-region ()
"Extend fontification region to include whole transactions or directives."
(save-match-data
(let* ((new-beg (min font-lock-beg (car (ledger-navigate-find-element-extents font-lock-beg))))
(new-end (max font-lock-end (cadr (ledger-navigate-find-element-extents font-lock-end))))
(changed (or (/= new-beg font-lock-beg)
(/= new-end font-lock-end))))
(setq font-lock-beg new-beg)
(setq font-lock-end new-end)
changed)))
(provide 'ledger-fontify)
;;; ledger-fontify.el ends here
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