Set up fontification independent of font-lock.

Basic functionality in place.  need to test further and expand detail fortification.

1 files changed, 173 insertions, 0 deletions

diff --git a/lisp/ledger-fontify.el b/lisp/ledger-fontify.el
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+++ b/lisp/ledger-fontify.el
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+;;; ledger-fontify.el --- Provide custom fontification for ledger-mode
+
+
+;; 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
+
+
+(provide 'ledger-fontify)
+
+(defcustom ledger-fontify-xact-state-overrides t
+  "If t the overall xact state (cleard, pending, nil) will
+  control the font of the entire transaction, not just the payee
+  line."
+  :type 'boolean
+  :group 'ledger-fontification)
+
+(defun ledger-fontify-whole-buffer ()
+	(interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (while (not (eobp))
+      (cond ((looking-at ledger-xact-start-regex)
+							(ledger-fontify-xact-at (point)))
+						((looking-at ledger-directive-start-regex)
+						 (ledger-fontify-directive-at (point))))
+
+			(forward-paragraph)
+			(forward-char))))
+
+(defun ledger-fontify-activate ()
+	"add hook to fontify after buffer changes"
+	(interactive)
+	(if (string= (format-mode-line 'mode-name) "Ledger")
+			(progn
+				(add-hook 'post-command-hook 'ledger-fontify-buffer-part)
+				;; this is a silly work around to emacs bug 16796 wherein
+				;; after-change-functions is randomly reset to nil.  Before
+				;; each change make sure after-change-functions is properly
+				;; set.
+;				(add-hook 'before-change-functions 'ledger-fontify-ensure-after-change-hook)
+				)))
+
+;; (defun ledger-fontify-ensure-after-change-hook (beg end)
+;; 	(if (string= (format-mode-line 'mode-name) "Ledger")
+;; 			(add-hook 'after-change-functions 'ledger-fontify-buffer-part)))
+
+(defun ledger-fontify-buffer-part ()
+	(save-excursion
+		(backward-paragraph)
+		(forward-char)
+		(cond ((looking-at ledger-xact-start-regex)
+					 (ledger-fontify-xact-at (point)))
+					((looking-at ledger-directive-start-regex)
+					 (ledger-fontify-directive-at (point))))))
+
+(defun ledger-fontify-xact-at (position)
+  (interactive "d")
+	(let ((extents (ledger-find-xact-extents position))
+				(state (ledger-transaction-state)))
+		(if (and ledger-fontify-xact-state-overrides state)
+				(cond ((eq state 'cleared)
+							 (ledger-fontify-set-face extents 'ledger-font-xact-cleared-face))
+							((eq state 'pending)
+							 (ledger-fontify-set-face extents 'ledger-font-xact-pending-face)))
+			(ledger-fontify-xact-by-line extents))))
+
+(defun ledger-fontify-xact-by-line (extends)
+	"do line-by-line detailed fontification of xact"
+	(save-excursion
+		(ledger-fontify-xact-start (car extents))))
+
+(defun ledger-fontify-xact-start (pos)
+	(interactive "d")
+	(goto-char pos)
+	(let ((state nil))
+		(re-search-forward ledger-xact-start-regex)
+		(ledger-fontify-set-face (list (match-beginning 1) (match-end 1)) 'ledger-font-posting-date-face)
+		(save-match-data (setq state (ledger-state-from-string (s-trim (match-string 5)))))
+		(ledger-fontify-set-face (list (match-beginning 7) (match-end 7))
+														 (cond ((eq state 'pending)
+																		'ledger-font-payee-pending-face)
+																	 ((eq state 'cleared)
+																		'ledger-font-payee-cleared-face)
+																	 (t
+																		'ledger-font-payee-uncleared-face)))
+		(ledger-fontify-set-face (list (match-beginning 8)
+																	 (match-end 8)) 'ledger-font-comment-face)))
+
+(defun ledger-fontify-directive-at (position)
+	(interactive "d")
+	(let ((extents (ledger-find-xact-extents position))
+				(face 'ledger-font-default-face))
+		(cond ((looking-at "=")
+					 (setq face 'ledger-font-auto-xact-face))
+					((looking-at "~")
+					 (setq face 'ledger-font-periodic-xact-face))
+					((looking-at "[;#%|\\*]")
+					 (setq face 'ledger-font-comment-face))
+					((looking-at "\\(year\\)\\|Y")
+					 (setq face 'ledger-font-year-directive-face))
+					((looking-at "account")
+					 (setq face 'ledger-font-account-directive-face))
+					((looking-at "apply")
+					 (setq face 'ledger-font-apply-directive-face))
+					((looking-at "alias")
+					 (setq face 'ledger-font-alias-directive-face))
+					((looking-at "assert")
+					 (setq face 'ledger-font-assert-directive-face))
+					((looking-at "\\(bucket\\)\\|A")
+					 (setq face 'ledger-font-bucket-directive-face))
+					((looking-at "capture")
+					 (setq face 'ledger-font-capture-directive-face))
+					((looking-at "check")
+					 (setq face 'ledger-font-check-directive-face))
+					((looking-at "commodity")
+					 (setq face 'ledger-font-commodity-directive-face))
+					((looking-at "define")
+					 (setq face 'ledger-font-define-directive-face))
+					((looking-at "end")
+					 (setq face 'ledger-font-end-directive-face))
+					((looking-at "expr")
+					 (setq face 'ledger-font-expr-directive-face))
+					((looking-at "fixed")
+					 (setq face 'ledger-font-fixed-directive-face))
+					((looking-at "include")
+					 (setq face 'ledger-font-include-directive-face))
+					((looking-at "payee")
+					 (setq face 'ledger-font-payee-directive-face))
+					((looking-at "tag")
+					 (setq face 'ledger-font-tag-directive-face)))
+		(ledger-fontify-set-face extents face)))
+
+(defun ledger-fontify-set-face (extents face)
+	(put-text-property (car extents) (cadr extents) 'face face))
+
+
+(defun s-trim-left (s)
+  "Remove whitespace at the beginning of S."
+  (if (string-match "\\`[ \t\n\r]+" s)
+      (replace-match "" t t s)
+    s))
+
+(defun s-trim-right (s)
+  "Remove whitespace at the end of S."
+  (if (string-match "[ \t\n\r]+\\'" s)
+      (replace-match "" t t s)
+    s))
+
+(defun s-trim (s)
+  "Remove whitespace at the beginning and end of S."
+  (s-trim-left (s-trim-right s)))
+;;; ledger-fontify.el ends here