code.delx.au - gnu-emacs-elpa/blob - packages/auctex-11.86/tex-font.el

   1 ;;; tex-font.el --- Font-Lock support stolen from Emacs 21.
   2 ;;
   3 ;; Copyright (C) 1985, 86, 89, 92, 94, 95, 96, 97, 98, 1999
   4 ;;       Free Software Foundation, Inc.
   5
   6 ;; Maintainer: auctex-devel@gnu.org
   7 ;; Keywords: tex, faces
   8
   9 ;; This file is part of AUC TeX.
  10
  11 ;; AUC TeX is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; AUC TeX is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with AUC TeX; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Comments:
  27
  28 ;; Please keep this file in sync with GNU Emacs 21.
  29
  30 ;;; Code:
  31
  32 (defconst tex-font-lock-keywords-1
  33   (eval-when-compile
  34     (let* (;; Names of commands whose arg should be fontified as heading, etc.
  35            (headings (regexp-opt
  36                       '("title"  "begin" "end" "chapter" "part"
  37                         "section" "subsection" "subsubsection"
  38                         "paragraph" "subparagraph" "subsubparagraph"
  39                         "newcommand" "renewcommand" "newenvironment"
  40                         "newtheorem")
  41                       t))
  42            (variables (regexp-opt
  43                        '("newcounter" "newcounter*" "setcounter" "addtocounter"
  44                          "setlength" "addtolength" "settowidth")
  45                        t))
  46            (includes (regexp-opt
  47                       '("input" "include" "includeonly" "bibliography"
  48                         "epsfig" "psfig" "epsf" "nofiles" "usepackage"
  49                         "documentstyle" "documentclass" "verbatiminput"
  50                         "includegraphics" "includegraphics*")
  51                       t))
  52            ;; Miscellany.
  53            (slash "\\\\")
  54            (opt " *\\(\\[[^]]*\\] *\\)*")
  55            ;; This would allow highlighting \newcommand\CMD but requires
  56            ;; adapting subgroup numbers below.
  57            ;; (arg "\\(?:{\\(\\(?:[^{}\\]+\\|\\\\.\\|{[^}]*}\\)+\\)\\|\\\\[a-z*]+\\)"))
  58            (arg "{\\(\\(?:[^{}\\]+\\|\\\\.\\|{[^}]*}\\)+\\)"))
  59       (list
  60        ;; Heading args.
  61        (list (concat slash headings "\\*?" opt arg)
  62              ;; If ARG ends up matching too much (if the {} don't match, f.ex)
  63              ;; jit-lock will do funny things: when updating the buffer
  64              ;; the re-highlighting is only done locally so it will just
  65              ;; match the local line, but defer-contextually will
  66              ;; match more lines at a time, so ARG will end up matching
  67              ;; a lot more, which might suddenly include a comment
  68              ;; so you get things highlighted bold when you type them
  69              ;; but they get turned back to normal a little while later
  70              ;; because "there's already a face there".
  71              ;; Using `keep' works around this un-intuitive behavior as well
  72              ;; as improves the behavior in the very rare case where you do
  73              ;; have a comment in ARG.
  74              3 'font-lock-function-name-face 'keep)
  75        (list (concat slash "\\(re\\)?newcommand\\** *\\(\\\\[A-Za-z@]+\\)")
  76              2 'font-lock-function-name-face 'keep)
  77        ;; Variable args.
  78        (list (concat slash variables " *" arg) 2 'font-lock-variable-name-face)
  79        ;; Include args.
  80        (list (concat slash includes opt arg) 3 'font-lock-builtin-face)
  81        ;; Definitions.  I think.
  82        '("^[ \t]*\\\\def *\\\\\\(\\(\\w\\|@\\)+\\)"
  83          1 font-lock-function-name-face))))
  84   "Subdued expressions to highlight in TeX modes.")
  85
  86 (defconst tex-font-lock-keywords-2
  87   (append tex-font-lock-keywords-1
  88    (eval-when-compile
  89      (let* (;;
  90             ;; Names of commands whose arg should be fontified with fonts.
  91             (bold (regexp-opt '("textbf" "textsc" "textup"
  92                                 "boldsymbol" "pmb") t))
  93             (italic (regexp-opt '("textit" "textsl" "emph") t))
  94             (type (regexp-opt '("texttt" "textmd" "textrm" "textsf") t))
  95             ;;
  96             ;; Names of commands whose arg should be fontified as a citation.
  97             (citations (regexp-opt
  98                         '("label" "ref" "pageref" "vref" "eqref"
  99                           "cite" "nocite" "index" "glossary" "bibitem"
 100                           ;; These are text, rather than citations.
 101                           ;; "caption" "footnote" "footnotemark" "footnotetext"
 102                           )
 103                         t))
 104             ;;
 105             ;; Names of commands that should be fontified.
 106             (specials (regexp-opt
 107                        '("\\" "\\*" ;; "-"
 108                          "linebreak" "nolinebreak" "pagebreak" "nopagebreak"
 109                          "newline" "newpage" "clearpage" "cleardoublepage"
 110                          "displaybreak" "allowdisplaybreaks" "enlargethispage")
 111                        t))
 112             (general "\\([a-zA-Z@]+\\**\\|[^ \t\n]\\)")
 113             ;;
 114             ;; Miscellany.
 115             (slash "\\\\")
 116             (opt " *\\(\\[[^]]*\\] *\\)*")
 117             (arg "{\\(\\(?:[^{}\\]+\\|\\\\.\\|{[^}]*}\\)+\\)"))
 118        (list
 119         ;;
 120         ;; Citation args.
 121         (list (concat slash citations opt arg) 3 'font-lock-constant-face)
 122         ;;
 123         ;; Text between `` quotes ''.
 124         (cons (concat (regexp-opt `("``" "\"<" "\"`" "<<" "«") t)
 125                       "[^'\">»]+"      ;a bit pessimistic
 126                       (regexp-opt `("''" "\">" "\"'" ">>" "»") t))
 127               'font-lock-string-face)
 128         ;;
 129         ;; Command names, special and general.
 130         (cons (concat slash specials) 'font-lock-warning-face)
 131         (concat slash general)
 132         ;;
 133         ;; Font environments.  It seems a bit dubious to use `bold' etc. faces
 134         ;; since we might not be able to display those fonts.
 135         (list (concat slash bold " *" arg) 2 '(quote bold) 'append)
 136         (list (concat slash italic " *" arg) 2 '(quote italic) 'append)
 137         ;; (list (concat slash type arg) 2 '(quote bold-italic) 'append)
 138         ;;
 139         ;; Old-style bf/em/it/sl.  Stop at `\\' and un-escaped `&', for tables.
 140         (list (concat "\\\\\\(\\(bf\\)\\|em\\|it\\|sl\\)\\>"
 141                       "\\(\\([^}&\\]\\|\\\\[^\\]\\)+\\)")
 142               3 '(if (match-beginning 2) 'bold 'italic) 'append)))))
 143    "Gaudy expressions to highlight in TeX modes.")
 144
 145 (defvar tex-font-lock-keywords tex-font-lock-keywords-1
 146   "Default expressions to highlight in TeX modes.")
 147
 148
 149 (defface tex-math-face
 150   '((t :inherit font-lock-string-face))
 151   "Face used to highlight TeX math expressions.")
 152 (defvar tex-math-face 'tex-math-face)
 153
 154 ;; Use string syntax but math face for $...$.
 155 (defun tex-font-lock-syntactic-face-function (state)
 156   (if (nth 3 state) tex-math-face font-lock-comment-face))
 157
 158 ;;;###autoload
 159 (defun tex-font-setup ()
 160   "Setup font lock support for TeX."
 161   (set (make-local-variable 'font-lock-defaults)
 162      '((tex-font-lock-keywords
 163         tex-font-lock-keywords-1 tex-font-lock-keywords-2)
 164        nil nil ((?$ . "\"")) nil
 165        ;; Who ever uses that anyway ???
 166        (font-lock-mark-block-function . mark-paragraph)
 167        (font-lock-syntactic-face-function
 168         . tex-font-lock-syntactic-face-function)))
 169     )
 170
 171 (provide 'tex-font)
 172
 173 ;;; tex-font.el ends here