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;;;; lilypond-font-lock.el --- syntax coloring for LilyPond mode
;;;;
;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 1997-2001 Han-Wen Nienhuys <[email protected]>,
;;;; 2001-2006 Heikki Junes <[email protected]>
;;;;
;;;; LilyPond 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 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
;;
;; Author: 2001-2006: Heikki Junes
;; * Emacs-mode: new keywords, reserved words, identifiers, notenames,
;; some dynamics and brackets are font-lock-keywords
;; * context-dependent syntax-tables
;; Author: 1997: Han-Wen Nienhuys
;; Author: 1995-1996 Barry A. Warsaw
;; 1992-1994 Tim Peters
;; Created: Feb 1992
;; Version: 2.9.29
;; Last Modified: 11NOV2006
;; Keywords: lilypond languages music notation
;; This started out as a cannabalised version of python-mode.el, by hwn
;; For changes see the LilyPond ChangeLog
;;
;; TODO:
;; - handle lexer modes (\header, \melodic) etc.
(defconst LilyPond-font-lock-keywords
(let* ((kwregex (mapconcat (lambda (x) (concat "\\" x)) LilyPond-keywords "\\|"))
(iregex (mapconcat (lambda (x) (concat "\\" x)) LilyPond-identifiers "\\|"))
(ncrwregex (mapconcat (lambda (x) (concat "" x)) LilyPond-non-capitalized-reserved-words "\\|"))
(rwregex (mapconcat (lambda (x) (concat "" x)) LilyPond-Capitalized-Reserved-Words "\\|"))
(duration "\\([ \t]*\\(128\\|6?4\\|3?2\\|16?\\|8\\)[.]*\\([ \t]*[*][ \t]*[0-9]+\\(/[1-9][0-9]*\\)?\\)?\\)")
(longduration "\\([ \t]*\\(\\\\\\(longa\\|breve\\|maxima\\)\\)[.]*\\([ \t]*[*][ \t]*[0-9]+\\(/[1-9][0-9]*\\)?\\)?\\)")
)
(list
;; Fonts in use (from GNU Emacs Lisp Reference Manual, elisp.ps):
;; font-lock- (c)omment / (s)tring / (k)eyword / (b)uiltin / (f)unction-name /
;; (v)ariable-name / (t)ype / co(n)stant / (w)arning -face
;; The order below is designed so that proofreading would be possible.
;; Fontify...
;; ... (f) identifiers and (k) keywords.
;; ... (n) user defined indetifiers
;; ... (v) the right and the left side of '='-marks.
;; ... (v) reserved words, e.g., FiguredBass.
;; ... (t) notes and rests
;; "on top", ... (s) lyrics-mode
;; "on top", ... (w) horizontal grouping
;; "on top", ... (f) vertical grouping
;; "on top", ... (b) expressional grouping
;; "on top", ... (s) (multiline-)scheme; urgh. one should count the slurs
;; "on top", ... (s) strings
;; "on top", ... (c) (multiline-)comments
;; One should note 'font-lock-multiline' has been possible since Emacs 21.1.
;; See, e.g., text in "http://emacs.kldp.org/emacs-21.1/etc/NEWS".
;; ... identifiers (defined above, see iregex)
(cons (concat "\\(\\([_^-]?\\(" iregex "\\)\\)+\\)\\($\\|[] \t(~{}>\\\\_()^*-]\\)") '(1 font-lock-function-name-face))
;; ... keywords (defined above, see kwregex)
(cons (concat "\\(\\([_^-]?\\(" kwregex "\\)\\)+\\)\\($\\|[] \t(~{}>\\\\_()^*-]\\)") '(1 font-lock-keyword-face))
;; ... user defined identifiers, roughly \[a-zA-Z]+ with single - or _ in between.
'("\\([_^-]?\\\\\\([a-zA-Z[:nonascii:]]\\(?:[-_]?[a-zA-Z[:nonascii:]]\\)*\\)\\)" 1 font-lock-constant-face)
;; ... the left side of '=' -mark
'("\\([_a-zA-Z.0-9-]+\\)[ \t]*=[ \t]*" 1 font-lock-variable-name-face)
;; ... the right side of '=' -mark
'("[ \t]*=[ \t]*\\([_a-zA-Z.0-9-]+\\)" 1 font-lock-variable-name-face)
;; ... reserved words (defined above, see rwregex)
(cons (concat "\\(" rwregex "\\)") 'font-lock-variable-name-face)
;; ... note or rest with (an accidental and) a duration, e.g., b,?16.*3/4
(cons (concat "\\(^\\|[ <\{[/~(!)\t\\\|]\\)\\(\\(\\(" ncrwregex "\\)[,']*[?!]?\\|[srR]\\)" duration "?\\)") '(2 font-lock-type-face))
;; "on top", ... notes and rests with a long duration
(cons (concat "\\(^\\|[ <\{[/~(!)\t\\\|]\\)\\(\\(\\(" ncrwregex "\\)[,']*[?!]?\\|[srR]\\)" longduration "\\)") '(2 font-lock-type-face t))
;; "on top", ... lyrics-mode: fontify everything between '<'...'>' or '{'...'}'
; URGH, does not know anything about inner brackets.
; Multiple lines may need refontifying (C-c f).
'("\\(\\\\lyrics[^{<]*\\)\\({[^}]*\\|<[^>]*\\)" 2 font-lock-string-face t)
;; "on top", ... horizontal grouping, also as postfix syntax '-*':
;; - brackets '{[]}'
;; - ties '~'
;; - ligatures \[, \]
'("\\(-?[][~}{]\\|\\\\[][]\\)" 0 font-lock-reference-face t)
;; "on top", ... vertical grouping:
;; - '<>'-chord brackets with '\\'-voice sep., not marcato '->'
;; - '<< a b >>8' -chords
(cons (concat "\\(\\(-.\\)+\\|[^-^_]\\)\\([<>]+\\(" duration "\\|" longduration "\\)?\\|\\\\\\\\\\)") '(3 font-lock-function-name-face t))
;; "on top", ... expressional grouping, also as postfix syntax '-*':
;; - slurs ( ), \( \), [-^_][()]
;; - hairpins \<, \>, \!
'("\\(-?\\\\[(<!>)]\\|[-^_]?[()]\\)" 0 font-lock-builtin-face t)
;; "on top", ... (multiline-)scheme: try find slurs up to 7th
'("[_^-]?#\\(#[ft]\\|-?[0-9.]+\\|\"[^\"]*\"\\|['`]?[a-zA-Z:-]+\\|['`]?([^()]*\\(([^()]*\\(([^()]*\\(([^()]*\\(([^()]*\\(([^()]*\\(([^)]*)[^()]*\\)*)[^()]*\\)*)[^()]*\\)*)[^()]*\\)*)[^()]*\\)*)[^()]*\\)*[^)]*)\\)" 0 font-lock-string-face t)
;; "on top", ... strings, match also unending strings at eof:
;; if '\n' was not found, it must be '$' which is eof (?).
'("\\([_^-]?\"\\([^\"\\\\]\\|\\\\.\\|\\\\\n\\)*\\(\"\\|$\\)\\)" 0 font-lock-string-face t)
;; "on top", ... (multiline-)comments
'("\\(%\\({[^%]*%\\(}\\|\\([^}][^%]*%\\)+}\\)\\|.*\\)\\)" 0 font-lock-comment-face t)
)
)
"Additional expressions to fontify in LilyPond mode.")
;; define a mode-specific abbrev table for those who use such things
(defvar LilyPond-mode-abbrev-table nil
"Abbrev table in use in `LilyPond-mode' buffers.")
(define-abbrev-table 'LilyPond-mode-abbrev-table nil)
(defvar LilyPond-mode-syntax-table nil
"Syntax table used in `LilyPond-mode' buffers.")
(defun LilyPond-mode-set-syntax-table (&optional not-punct)
"Change syntax table according to the argument `not-punct' which contains characters which are given a context dependent non-punctuation syntax: parentheses may be set to parenthesis syntax and characters `-', `^' and `_' may be set to escape syntax."
(if (not not-punct) (setq not-punct '()))
(setq LilyPond-mode-syntax-table (make-syntax-table))
(let ((defaults
'(
;; NOTE: Emacs knows only "13"-style (used), XEmacs knows also "1b3b", etc.
( ?\% . "< 13" ) ; comment starter, 1st char in block-comments
( ?\n . ">") ; newline: comment ender
( ?\r . ">") ; formfeed: comment ender
( ?\\ . "\\" ) ; escape characters (as '\n' in strings)
( ?\" . "\"" ) ; string quote characters
;; word constituents (e.g., belonging to a note)
( ?\' . "w") ( ?\, . "w") ; transposing octaves
;; punctuation characters (separate symbols from another)
( ?\$ . "." ) ( ?\& . "." )
( ?\* . "." ) ( ?\+ . "." ) ( ?\/ . "." ) ( ?\= . "." )
( ?\| . "." ) ; bar line
)))
;; all the paren characters are now handled by lily-specific indenting/matching code in lilypond-indent.el
(if (or (memq ?\{ not-punct) (memq ?\} not-punct))
(setq defaults (cons '( ?\{ . "(} 2" ) (cons '( ?\} . "){ 4" ) defaults))) ; begin and end of a block-comment
(setq defaults (cons '( ?\{ . ". 2" ) (cons '( ?\} . ". 4" ) defaults)))) ; begin and end of a block-comment
(if (or (memq ?\[ not-punct) (memq ?\] not-punct))
(setq defaults (cons '( ?\[ . "(]" ) (cons '( ?\] . ")[" ) defaults)))
(setq defaults (cons '( ?\[ . "." ) (cons '( ?\] . "." ) defaults))))
(if (or (memq ?\< not-punct) (memq ?\> not-punct))
(setq defaults (cons '( ?\< . "(>" ) (cons '( ?\> . ")<" ) defaults)))
(setq defaults (cons '( ?\< . "." ) (cons '( ?\> . "." ) defaults))))
(if (or (memq ?\( not-punct) (memq ?\) not-punct))
(setq defaults (cons '( ?\( . "()" ) (cons '( ?\) . ")(" ) defaults)))
(setq defaults (cons '( ?\( . "." ) (cons '( ?\) . "." ) defaults))))
;; In LilyPond the following chars serve as escape chars, e.g., c^> d-) e_( ,
;; but they may be set to punctuation chars, since inside strings they should not act as escape chars
(setq defaults (cons (if (memq ?- not-punct) '( ?\- . "\\" ) '( ?\- . "." ) ) defaults))
(setq defaults (cons (if (memq ?^ not-punct) '( ?^ . "\\" ) '( ?^ . "." ) ) defaults))
(setq defaults (cons (if (memq ?\_ not-punct) '( ?\_ . "\\" ) '( ?\_ . "." ) ) defaults))
(mapcar (function
(lambda (x) (modify-syntax-entry
(car x) (cdr x) LilyPond-mode-syntax-table)))
defaults)
(set-syntax-table LilyPond-mode-syntax-table)))
(defun LilyPond-mode-context-set-syntax-table ()
"Change syntax table according to current context."
(interactive)
;; default syntax table sets parentheses to punctuation characters
(LilyPond-mode-set-syntax-table)
;; find current context
(setq context (parse-partial-sexp (point-min) (point)))
(cond ((nth 3 context)) ; inside string
((nth 4 context)) ; inside a comment
((eq (char-syntax (or (char-before (point)) 0)) ?\\)) ; found escape-char
((and (eq (char-syntax (or (char-before (- (point) 1)) 0)) ?\\)
(memq (char-before (point)) '( ?\) ?\] )))) ; found escape-char
((memq (char-before (point)) '( ?\) ))
(LilyPond-mode-set-syntax-table '( ?\( ?\) )))
((memq (char-before (point)) '( ?\] ))
(LilyPond-mode-set-syntax-table '( ?\[ ?\] )))
((memq (char-before (point)) '( ?\> ?\} ))
(LilyPond-mode-set-syntax-table '( ?\< ?\> ?\{ ?\} ?\^ ?\- ?\_ )))
((memq (char-after (point)) '( ?\( ))
(LilyPond-mode-set-syntax-table '( ?\( ?\) )))
((memq (char-after (point)) '( ?\[ ))
(LilyPond-mode-set-syntax-table '( ?\[ ?\] )))
((memq (char-after (point)) '( ?\< ?\{ ))
(LilyPond-mode-set-syntax-table '( ?\< ?\> ?\{ ?\} ?\^ ?\- ?\_ )))
))
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