1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
;;; bibtex-style.el --- Major mode for BibTeX Style files
;; Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
;; Keywords: tex
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Done: font-lock, imenu, outline, commenting, indentation.
;; Todo: tab-completion.
;; Bugs:
;;; Code:
(defvar bibtex-style-mode-syntax-table
(let ((st (make-syntax-table)))
(modify-syntax-entry ?% "<" st)
(modify-syntax-entry ?\n ">" st)
(modify-syntax-entry ?\{ "(}" st)
(modify-syntax-entry ?\} "){" st)
(modify-syntax-entry ?\" "\"" st)
(modify-syntax-entry ?. "_" st)
(modify-syntax-entry ?' "'" st)
(modify-syntax-entry ?# "'" st)
(modify-syntax-entry ?* "." st)
(modify-syntax-entry ?= "." st)
(modify-syntax-entry ?$ "_" st)
st))
(defconst bibtex-style-commands
'("ENTRY" "EXECUTE" "FUNCTION" "INTEGERS" "ITERATE" "MACRO" "READ"
"REVERSE" "SORT" "STRINGS"))
(defconst bibtex-style-functions
;; From http://www.eeng.dcu.ie/local-docs/btxdocs/btxhak/btxhak/node4.html.
'("<" ">" "=" "+" "-" "*" ":="
"add.period$" "call.type$" "change.case$" "chr.to.int$" "cite$"
"duplicate$" "empty$" "format.name$" "if$" "int.to.chr$" "int.to.str$"
"missing$" "newline$" "num.names$" "pop$" "preamble$" "purify$" "quote$"
"skip$" "stack$" "substring$" "swap$" "text.length$" "text.prefix$"
"top$" "type$" "warning$" "while$" "width$" "write$"))
(defvar bibtex-style-font-lock-keywords
`((,(regexp-opt bibtex-style-commands 'words) . font-lock-keyword-face)
("\\w+\\$" . font-lock-keyword-face)
("\\<\\(FUNCTION\\|MACRO\\)\\s-+{\\([^}\n]+\\)}"
(2 font-lock-function-name-face))))
;;;###autoload (add-to-list 'auto-mode-alist (cons (purecopy "\\.bst\\'") 'bibtex-style-mode))
;;;###autoload
(define-derived-mode bibtex-style-mode nil "BibStyle"
"Major mode for editing BibTeX style files."
(set (make-local-variable 'comment-start) "%")
(set (make-local-variable 'outline-regexp) "^[a-z]")
(set (make-local-variable 'imenu-generic-expression)
'((nil "\\<\\(FUNCTION\\|MACRO\\)\\s-+{\\([^}\n]+\\)}" 2)))
(set (make-local-variable 'indent-line-function) 'bibtex-style-indent-line)
(set (make-local-variable 'parse-sexp-ignore-comments) t)
(setq font-lock-defaults
'(bibtex-style-font-lock-keywords nil t
((?. . "w")))))
(defun bibtex-style-indent-line ()
"Indent current line of BibTeX Style code."
(interactive)
(let* ((savep (point))
(indent (condition-case nil
(save-excursion
(forward-line 0)
(skip-chars-forward " \t")
(if (>= (point) savep) (setq savep nil))
(max (bibtex-style-calculate-indentation) 0))
(error 0))))
(if savep
(save-excursion (indent-line-to indent))
(indent-line-to indent))))
(defcustom bibtex-style-indent-basic 2
"Basic amount of indentation to use in BibTeX Style mode."
:version "22.2"
:type 'integer
:group 'bibtex)
(defun bibtex-style-calculate-indentation (&optional virt)
(or
;; Stick the first line at column 0.
(and (= (point-min) (line-beginning-position)) 0)
;; Commands start at column 0.
(and (looking-at (regexp-opt bibtex-style-commands 'words)) 0)
;; Trust the current indentation, if such info is applicable.
(and virt (save-excursion (skip-chars-backward " \t{") (bolp))
(current-column))
;; Put leading close-paren where the matching open brace would be.
(and (looking-at "}")
(condition-case nil
(save-excursion
(up-list -1)
(bibtex-style-calculate-indentation 'virt))
(scan-error nil)))
;; Align leading "if$" with previous command.
(and (looking-at "if\\$")
(condition-case nil
(save-excursion
(backward-sexp 3)
(bibtex-style-calculate-indentation 'virt))
(scan-error
;; There is no command before the "if$".
(condition-case nil
(save-excursion
(up-list -1)
(+ bibtex-style-indent-basic
(bibtex-style-calculate-indentation 'virt)))
(scan-error nil)))))
;; Right after an opening brace.
(condition-case err (save-excursion (backward-sexp 1) nil)
(scan-error (goto-char (nth 2 err))
(+ bibtex-style-indent-basic
(bibtex-style-calculate-indentation 'virt))))
;; Default, align with previous command.
(let ((fai ;; First arm of an "if$".
(condition-case nil
(save-excursion
(forward-sexp 2)
(forward-comment (point-max))
(looking-at "if\\$"))
(scan-error nil))))
(save-excursion
(condition-case err
(while (progn
(backward-sexp 1)
(save-excursion (skip-chars-backward " \t{") (not (bolp)))))
(scan-error nil))
(+ (current-column)
(if (or fai (looking-at "ENTRY")) bibtex-style-indent-basic 0))))))
(provide 'bibtex-style)
;; arch-tag: b20ad41a-fd36-466e-8fd2-cc6137f9c55c
;;; bibtex-style.el ends here
|
