code.delx.au - gnu-emacs/blob - lisp/progmodes/meta-mode.el

   1 ;;; meta-mode.el --- major mode for editing Metafont or MetaPost sources
   2
   3 ;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4 ;; Free Software Foundation, Inc.
   5
   6 ;; Author: Ulrik Vieth <vieth@thphy.uni-duesseldorf.de>
   7 ;; Version: 1.0
   8 ;; Keywords: Metafont, MetaPost, tex, languages
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 3, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; Description:
  30 ;;
  31 ;; This Emacs Lisp package provides a major mode for editing Metafont
  32 ;; or MetaPost sources.  It includes all the necessary code to set up
  33 ;; a major mode including an approriate syntax table, keymap, and a
  34 ;; mode-specific pull-down menu.  It also provides a sophisticated set
  35 ;; of font-lock patterns, a fancy indentation function adapted from
  36 ;; AUCTeX's latex.el, and some basic mode-specific editing functions
  37 ;; such as functions to move to the beginning or end of the enclosing
  38 ;; environment, or to mark, re-indent, or comment-out environments.
  39 ;; On the other hand, it doesn't yet provide any functionality for
  40 ;; running Metafont or MetaPost in a shell buffer form within Emacs,
  41 ;; but such functionality might be added later, either as part of this
  42 ;; package or as a separate Emacs Lisp package.
  43
  44 ;; Installation:
  45 ;;
  46 ;; An interface to running Metafont or MetaPost as a shell process
  47 ;; from within Emacs is currently under development as a separate
  48 ;; Emacs Lisp package (meta-buf.el).  In order to have that package
  49 ;; loaded automatically when first entering Metafont or MetaPost mode,
  50 ;; you might use the load-hook provided in this package by adding
  51 ;; these lines to your startup file:
  52 ;;
  53 ;;  (add-hook 'meta-mode-load-hook
  54 ;;            (lambda () (require 'meta-buf)))
  55 ;;
  56 ;; The add-on package loaded this way may in turn make use of the
  57 ;; mode-hooks provided in this package to activate additional features
  58 ;; when entering Metafont or MetaPost mode.
  59
  60 ;; Font Lock Support:
  61 ;;
  62 ;; If you are using global-font-lock-mode (introduced in Emacs 19.31),
  63 ;; fontification in Metafont and/or MetaPost mode will be activated
  64 ;; automatically.  To speed up fontification for the rather complex
  65 ;; patterns used in these modes, it may be a good idea to activate
  66 ;; lazy-lock as a font-lock-support-mode (introduced in Emacs 19.32)
  67 ;; by adding these lines to your startup file:
  68 ;;
  69 ;;  (global-font-lock-mode t)
  70 ;;  (setq font-lock-support-mode 'lazy-lock-mode)
  71 ;;
  72 ;; If you are using an older version of Emacs, which doesn't provide
  73 ;; global-font-lock-mode or font-lock-support-mode, you can also
  74 ;; activate fontification in Metafont and/or MetaPost mode by adding
  75 ;; the following lines to your startup file:
  76 ;;
  77 ;;  (add-hook 'meta-common-mode-hook 'turn-on-font-lock)
  78 ;;  (add-hook 'meta-common-mode-hook 'turn-on-lazy-lock)
  79
  80 ;; Customization:
  81 ;;
  82 ;; Following the usual Emacs Lisp coding conventions, the major modes
  83 ;; defined in this package provide several hook variables to allow for
  84 ;; local customization when entering the modes.  In particular, there
  85 ;; is a `meta-common-mode-hook' which applies to both modes as well as
  86 ;; `metafont-mode-hook' and `metapost-mode-hook' which apply to the
  87 ;; individual modes.  In addition, there are several variables and
  88 ;; regexps controlling e.g. the behavior of the indentation function,
  89 ;; which may be customized via `edit-options'.  Please refer to the
  90 ;; docstrings in the code below for details.
  91
  92 ;; Availability:
  93 ;;
  94 ;; This package is currently available via my "TeX Software" WWW page:
  95 ;;
  96 ;;  http://www.thphy.uni-duesseldorf.de/~vieth/subjects/tex/software.html
  97 ;;
  98 ;; As of this version 1.0, this package will be uploaded to CTAN
  99 ;; archives, where it shall find a permanent home, presumably in
 100 ;; tex-archive/support/emacs-modes.  It will also be submitted for
 101 ;; integration into the GNU Emacs distribution at that time.
 102 ;;
 103 ;; History:
 104 ;;
 105 ;; v 0.0 -- 1997/02/01  UV  Started writing meta-mode.el.
 106 ;; v 0.1 -- 1997/02/02  UV  Added preliminary set of font-lock patterns.
 107 ;; v 0.2 -- 1997/02/03  UV  Improved and debugged font-lock patterns.
 108 ;;                          Added indent-line-function for TAB.
 109 ;; v 0.3 -- 1997/02/17  UV  Improved font-lock patterns and syntax table.
 110 ;;                          Improved and debbuged indentation function.
 111 ;; v 0.4 -- 1997/02/18  UV  Added functions to indent regions for M-C-q,
 112 ;;                          also added a preliminary mode-specific menu.
 113 ;; v 0.5 -- 1997/02/19  UV  Added functions to skip to next or previous
 114 ;;                          defun and to re-indent or comment-out defuns.
 115 ;; v 0.6 -- 1997/02/20  UV  More debugging, testing and clean-up.
 116 ;; v 0.7 -- 1997/02/22  UV  Use easymenu to define mode-specific menu.
 117 ;; v 0.8 -- 1997/02/24  UV  Added completion function for M-TAB.
 118 ;; v 0.9 -- 1997/03/08  UV  Added fill-paragraph function for comments.
 119 ;;                          Also fixed a few remaining font-lock problems.
 120 ;;                          Added meta-mode-load-hook to load meta-buf.el.
 121 ;; v 1.0 -- 1997/04/07  UV  Cleanup for official public release.
 122 ;;
 123 ;; Historical Footnote:
 124 ;;
 125 ;; This package was begun on February 1, 1997, exactly 20 years after
 126 ;; the genesis of TeX took place according to Don Knuth's own account
 127 ;; (cf.  ``The Errors of TeX'', reprinted in ``Literate Programming'',
 128 ;; Chapter 10, p. 249).  What better date could there be to choose?
 129 ;;
 130
 131 \f
 132 ;;; Code:
 133
 134 (require 'easymenu)
 135
 136 (defgroup meta-font nil
 137   "Major mode for editing Metafont or MetaPost sources."
 138   :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
 139   :group 'languages)
 140
 141 ;;; Fontification.
 142
 143 (defvar meta-font-lock-keywords
 144       (let ((input-keywords
 145              "\\(input\\|generate\\)")
 146             (begin-keywords
 147              (concat "\\(begin\\(char\\|fig\\|graph\\|logochar\\)\\|"
 148                      "\\cmchar\\|dcchar\\|ecchar\\)"))
 149             (end-keywords
 150              "\\(end\\(char\\|fig\\|graph\\)\\)")
 151             (macro-keywords-1
 152              "\\(def\\|let\\|mode_def\\|vardef\\)")
 153             (macro-keywords-2
 154              "\\(primarydef\\|secondarydef\\|tertiarydef\\)")
 155 ;(make-regexp
 156 ; '("expr" "suffix" "text" "primary" "secondary" "tertiary") t)
 157             (args-keywords
 158              (concat "\\(expr\\|primary\\|s\\(econdary\\|uffix\\)\\|"
 159                      "te\\(rtiary\\|xt\\)\\)"))
 160 ;(make-regexp
 161 ; '("boolean" "color" "numeric" "pair" "path" "pen" "picture"
 162 ;   "string" "transform" "newinternal") t)
 163             (type-keywords
 164              (concat "\\(boolean\\|color\\|n\\(ewinternal\\|umeric\\)\\|"
 165                      "p\\(a\\(ir\\|th\\)\\|en\\|icture\\)\\|string\\|"
 166                      "transform\\)"))
 167 ;(make-regexp
 168 ; '("for" "forever" "forsuffixes" "endfor"
 169 ;   "step" "until" "upto" "downto" "thru" "within"
 170 ;   "iff" "if" "elseif" "else" "fi" "exitif" "exitunless"
 171 ;   "let" "def" "vardef" "enddef" "mode_def"
 172 ;   "true" "false" "known" "unknown" "and" "or" "not"
 173 ;   "save" "interim" "inner" "outer" "relax"
 174 ;   "begingroup" "endgroup" "expandafter" "scantokens"
 175 ;   "generate" "input" "endinput" "end" "bye"
 176 ;   "message" "errmessage" "errhelp" "special" "numspecial"
 177 ;   "readstring" "readfrom" "write") t)
 178             (syntactic-keywords
 179              (concat "\\(and\\|b\\(egingroup\\|ye\\)\\|"
 180                      "d\\(ef\\|ownto\\)\\|e\\(lse\\(\\|if\\)"
 181                      "\\|nd\\(\\|def\\|for\\|group\\|input\\)"
 182                      "\\|rr\\(help\\|message\\)"
 183                      "\\|x\\(it\\(if\\|unless\\)\\|pandafter\\)\\)\\|"
 184                      "f\\(alse\\|i\\|or\\(\\|ever\\|suffixes\\)\\)\\|"
 185                      "generate\\|i\\(ff?\\|n\\(ner\\|put\\|terim\\)\\)\\|"
 186                      "known\\|let\\|m\\(essage\\|ode_def\\)\\|"
 187                      "n\\(ot\\|umspecial\\)\\|o\\(r\\|uter\\)\\|"
 188                      "re\\(ad\\(from\\|string\\)\\|lax\\)\\|"
 189                      "s\\(ave\\|cantokens\\|pecial\\|tep\\)\\|"
 190                      "t\\(hru\\|rue\\)\\|"
 191                      "u\\(n\\(known\\|til\\)\\|pto\\)\\|"
 192                      "vardef\\|w\\(ithin\\|rite\\)\\)"))
 193             )
 194         (list
 195          ;; embedded TeX code in btex ... etex
 196          (cons (concat "\\(btex\\|verbatimtex\\)"
 197                        "[ \t\f]+\\(.*\\)[ \t\f]+"
 198                        "\\(etex\\)")
 199                '((1 font-lock-keyword-face)
 200                  (2 font-lock-string-face)
 201                  (3 font-lock-keyword-face)))
 202          ;; unary macro definitions: def, vardef, let
 203          (cons (concat "\\<" macro-keywords-1 "\\>"
 204                        "[ \t\f]+\\(\\sw+\\|\\s_+\\|\\s.+\\)")
 205                '((1 font-lock-keyword-face)
 206                  (2 font-lock-function-name-face)))
 207          ;; binary macro defintions: <leveldef> x operator y
 208          (cons (concat "\\<" macro-keywords-2 "\\>"
 209                        "[ \t\f]+\\(\\sw+\\)"
 210                        "[ \t\f]*\\(\\sw+\\|\\s.+\\)"
 211                        "[ \t\f]*\\(\\sw+\\)")
 212                '((1 font-lock-keyword-face)
 213                  (2 font-lock-variable-name-face nil t)
 214                  (3 font-lock-function-name-face nil t)
 215                  (4 font-lock-variable-name-face nil t)))
 216          ;; variable declarations: numeric, pair, color, ...
 217          (cons (concat "\\<" type-keywords "\\>"
 218                        "\\([ \t\f]+\\(\\sw+\\)\\)*")
 219                '((1 font-lock-type-face)
 220                  (font-lock-match-meta-declaration-item-and-skip-to-next
 221                   (goto-char (match-end 1)) nil
 222                   (1 font-lock-variable-name-face nil t))))
 223          ;; argument declarations: expr, suffix, text, ...
 224          (cons (concat "\\<" args-keywords "\\>"
 225                        "\\([ \t\f]+\\(\\sw+\\|\\s_+\\)\\)*")
 226                '((1 font-lock-type-face)
 227                  (font-lock-match-meta-declaration-item-and-skip-to-next
 228                   (goto-char (match-end 1)) nil
 229                   (1 font-lock-variable-name-face nil t))))
 230          ;; special case of arguments: expr x of y
 231          (cons (concat "\\(expr\\)[ \t\f]+\\(\\sw+\\)"
 232                        "[ \t\f]+\\(of\\)[ \t\f]+\\(\\sw+\\)")
 233                '((1 font-lock-type-face)
 234                  (2 font-lock-variable-name-face)
 235                  (3 font-lock-keyword-face nil t)
 236                  (4 font-lock-variable-name-face nil t)))
 237          ;; syntactic keywords
 238          (cons (concat "\\<" syntactic-keywords "\\>")
 239                'font-lock-keyword-face)
 240          ;; beginchar, beginfig
 241          (cons (concat "\\<" begin-keywords "\\>")
 242                'font-lock-keyword-face)
 243          ;; endchar, endfig
 244          (cons (concat "\\<" end-keywords "\\>")
 245                'font-lock-keyword-face)
 246          ;; input, generate
 247          (cons (concat "\\<" input-keywords "\\>"
 248                        "[ \t\f]+\\(\\sw+\\)")
 249                '((1 font-lock-keyword-face)
 250                  (2 font-lock-constant-face)))
 251          ;; embedded Metafont/MetaPost code in comments
 252          (cons "|\\([^|]+\\)|"
 253                '(1 font-lock-constant-face t))
 254      ))
 255   "Default expressions to highlight in Metafont or MetaPost mode.")
 256
 257
 258 (defun font-lock-match-meta-declaration-item-and-skip-to-next (limit)
 259   ;; Match and move over Metafont/MetaPost declaration item after point.
 260   ;;
 261   ;; The expected syntax of an item is either "word" or "symbol",
 262   ;; possibly ending with optional whitespace.  Everything following
 263   ;; the item (but belonging to it) is expected to by skipable by
 264   ;; `forward-sexp'.  The list of items is expected to be separated
 265   ;; by commas and terminated by semicolons or equals signs.
 266   ;;
 267   (if (looking-at "[ \t\f]*\\(\\sw+\\|\\s_+\\)")
 268       (save-match-data
 269         (condition-case nil
 270             (save-restriction
 271               ;; Restrict to end of line, currently guaranteed to be LIMIT.
 272               (narrow-to-region (point-min) limit)
 273               (goto-char (match-end 1))
 274               ;; Move over any item value, etc., to the next item.
 275               (while (not (looking-at "[ \t\f]*\\(\\(,\\)\\|;\\|=\\|$\\)"))
 276                 (goto-char (or (scan-sexps (point) 1) (point-max))))
 277               (goto-char (match-end 2)))
 278           (error t)))))
 279
 280
 281 \f
 282 ;;; Completion.
 283
 284 ;; The data used to prepare the following lists of primitives and
 285 ;; standard macros available in Metafont or MetaPost was extracted
 286 ;; from the original sources like this:
 287 ;;
 288 ;;   grep '^primitive' texk-7.0/web2c/{mf,mp}.web |\
 289 ;;   sed 's/primitive(\("[a-zA-Z]*"\).*/\1/' > {mf,mp}_prim.list
 290 ;;
 291 ;;   grep '\(let\|def\|vardef\|primarydef\|secondarydef\|tertiarydef\)'
 292 ;;     texmf/meta{font,post}/plain.{mf,mp} > {mf,mp}_plain.list
 293
 294 (defconst meta-common-primitives-list
 295   '("ASCII" "addto" "also" "and" "angle" "atleast" "batchmode"
 296     "begingroup" "boolean" "boundarychar" "char" "charcode" "chardp"
 297     "charexists" "charext" "charht" "charic" "charlist" "charwd"
 298     "contour" "controls" "cosd" "curl" "cycle" "day" "decimal" "def"
 299     "delimiters" "designsize" "directiontime" "doublepath" "dump" "else"
 300     "elseif" "end" "enddef" "endfor" "endgroup" "endinput" "errhelp"
 301     "errmessage" "errorstopmode" "everyjob" "exitif" "expandafter"
 302     "expr" "extensible" "false" "fi" "floor" "fontdimen" "fontmaking"
 303     "for" "forever" "forsuffixes" "headerbyte" "hex" "if" "inner"
 304     "input" "interim" "intersectiontimes" "jobname" "kern" "known"
 305     "length" "let" "ligtable" "makepath" "makepen" "message" "mexp"
 306     "mlog" "month" "newinternal" "nonstopmode" "normaldeviate" "not"
 307     "nullpen" "nullpicture" "numeric" "oct" "odd" "of" "or" "outer"
 308     "pair" "path" "pausing" "pen" "pencircle" "penoffset" "picture"
 309     "point" "postcontrol" "precontrol" "primary" "primarydef" "quote"
 310     "randomseed" "readstring" "reverse" "rotated" "save" "scaled"
 311     "scantokens" "scrollmode" "secondary" "secondarydef" "shifted"
 312     "shipout" "show" "showdependencies" "showstats" "showstopping"
 313     "showtoken" "showvariable" "sind" "skipto" "slanted" "special"
 314     "sqrt" "step" "str" "string" "subpath" "substring" "suffix"
 315     "tension" "tertiary" "tertiarydef" "text" "time" "to"
 316     "tracingcapsules" "tracingchoices" "tracingcommands"
 317     "tracingequations" "tracingmacros" "tracingonline" "tracingoutput"
 318     "tracingrestores" "tracingspecs" "tracingstats" "tracingtitles"
 319     "transform" "transformed" "true" "turningnumber" "uniformdeviate"
 320     "unknown" "until" "vardef" "warningcheck" "withpen" "xpart"
 321     "xscaled" "xxpart" "xypart" "year" "ypart" "yscaled" "yxpart"
 322     "yypart" "zscaled")
 323   "List of primitives common to Metafont and MetaPost.")
 324
 325 (defconst metafont-primitives-list
 326   '("at" "autorounding" "chardx" "chardy" "cull" "display"
 327     "dropping" "fillin" "from" "granularity" "hppp" "inwindow"
 328     "keeping" "numspecial" "openwindow" "proofing" "smoothing"
 329     "totalweight" "tracingedges" "tracingpens" "turningcheck" "vppp"
 330     "withweight" "xoffset" "yoffset")
 331   "List of primitives only defined in Metafont.")
 332
 333 (defconst metapost-primitives-list
 334   '("arclength" "arctime" "bluepart" "bounded" "btex" "clip"
 335     "clipped" "color" "dashed" "dashpart" "etex" "filled" "fontpart"
 336     "fontsize" "greenpart" "infont" "linecap" "linejoin" "llcorner"
 337     "lrcorner" "miterlimit" "mpxbreak" "pathpart" "penpart"
 338     "prologues" "readfrom" "redpart" "setbounds" "stroked" "textpart"
 339     "textual" "tracinglostchars" "truecorners" "ulcorner" "urcorner"
 340     "verbatimtex" "withcolor" "within" "write")
 341   "List of primitives only defined in MetaPost.")
 342
 343 (defconst meta-common-plain-macros-list
 344   '( "abs" "bot" "bye" "byte" "ceiling" "clear_pen_memory"
 345      "clearit" "clearpen" "clearxy" "counterclockwise" "cutdraw" "decr"
 346      "dir" "direction" "directionpoint" "div" "dotprod" "downto" "draw"
 347      "drawdot" "erase" "exitunless" "fill" "filldraw" "flex" "gobble"
 348      "hide" "incr" "interact" "interpath" "intersectionpoint" "inverse"
 349      "label" "labels" "lft" "loggingall" "magstep" "makelabel" "max"
 350      "min" "mod" "numtok" "penlabels" "penpos" "penstroke" "pickup"
 351      "range" "reflectedabout" "relax" "rotatedabout" "rotatedaround"
 352      "round" "rt" "savepen" "shipit" "softjoin" "solve" "stop"
 353      "superellipse" "takepower" "tensepath" "thru" "top" "tracingall"
 354      "tracingnone" "undraw" "undrawdot" "unfill" "unfilldraw"
 355      "unitvector" "upto" "whatever")
 356   "List of macros common to plain Metafont and MetaPost.")
 357
 358 (defconst metafont-plain-macros-list
 359   '("beginchar" "change_width" "culldraw" "cullit" "cutoff"
 360     "define_blacker_pixels" "define_corrected_pixels"
 361     "define_good_x_pixels" "define_good_y_pixels"
 362     "define_horizontal_corrected_pixels" "define_pixels"
 363     "define_whole_blacker_pixels" "define_whole_pixels"
 364     "define_whole_vertical_blacker_pixels"
 365     "define_whole_vertical_pixels" "endchar" "fix_units"
 366     "font_coding_scheme" "font_extra_space" "font_identifier"
 367     "font_normal_shrink" "font_normal_space" "font_normal_stretch"
 368     "font_quad" "font_size" "font_slant" "font_x_height" "gfcorners"
 369     "good.bot" "good.lft" "good.rt" "good.top" "good.x" "good.y"
 370     "grayfont" "hround" "imagerules" "italcorr" "labelfont"
 371     "lowres_fix" "makebox" "makegrid" "maketicks" "mode_lowres"
 372     "mode_proof" "mode_setup" "mode_smoke" "nodisplays" "notransforms"
 373     "openit" "penrazor" "pensquare" "proofoffset" "proofrule"
 374     "proofrulethickness" "screenchars" "screenrule" "screenstrokes"
 375     "showit" "slantfont" "smode" "titlefont" "vround")
 376   "List of macros only defined in plain Metafont.")
 377
 378 (defconst metapost-plain-macros-list
 379   '("arrowhead" "bbox" "beginfig" "buildcycle" "center" "cutafter"
 380     "cutbefore" "dashpattern" "dotlabel" "dotlabels" "drawarrow"
 381     "drawdblarrow" "drawoptions" "endfig" "image" "label" "off" "on"
 382     "thelabel")
 383   "List of macros only defined in plain MetaPost.")
 384
 385 (defconst metapost-graph-macros-list
 386   '("augment" "auto.x" "auto.y" "autogrid" "begingraph" "endgraph"
 387     "format" "frame" "gdata" "gdotlabel" "gdraw" "gdrawarrow"
 388     "gdrawdblarrow" "gfill" "glabel" "grid" "itick" "otick" "plot"
 389     "setcoords" "setrange")
 390   "List of macros only defined in MetaPost \"graph\" package.")
 391
 392 (defconst metapost-boxes-macros-list
 393   '("boxit" "boxjoin" "bpath" "circleit" "drawboxed" "drawboxes"
 394     "drawunboxed" "fixpos" "fixsize" "pic" "rboxit")
 395   "List of macros only defined in MetaPost \"boxes\" package.")
 396
 397
 398 (defvar metafont-symbol-list
 399   (append meta-common-primitives-list
 400           metafont-primitives-list
 401           meta-common-plain-macros-list
 402           metafont-plain-macros-list)
 403   "List of known symbols to complete in Metafont mode.")
 404
 405 (defvar metapost-symbol-list
 406   (append meta-common-primitives-list
 407           metapost-primitives-list
 408           meta-common-plain-macros-list
 409           metapost-plain-macros-list
 410           metapost-graph-macros-list
 411           metapost-boxes-macros-list)
 412   "List of known symbols to complete in MetaPost mode.")
 413
 414
 415 (defvar meta-symbol-list nil
 416   "List of known symbols to complete in Metafont or MetaPost mode.")
 417
 418 (defvar meta-symbol-changed nil
 419   "Flag indicating whether `meta-symbol-list' has been initialized.")
 420
 421 (defvar meta-complete-list nil
 422 ;  (list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
 423 ;        (list "" 'ispell-complete-word))
 424   "List of ways to perform completion in Metafont or MetaPost mode.
 425
 426 Each entry is a list with the following elements:
 427 1. Regexp matching the preceding text.
 428 2. A number indicating the subgroup in the regexp containing the text.
 429 3. A function returning an alist of possible completions.
 430 4. Text to append after a succesful completion (if any).
 431
 432 Or alternatively:
 433 1. Regexp matching the preceding text.
 434 2. Function to do the actual completion.")
 435
 436
 437 (defun meta-add-symbols (&rest entries)
 438   "Add entries to list of known symbols in Metafont or MetaPost mode."
 439   (if meta-symbol-changed
 440       (setq meta-symbol-list (cons entries meta-symbol-list))
 441     (setq meta-symbol-changed t)
 442     (setq meta-symbol-list (cons entries meta-symbol-list))))
 443
 444 (defun meta-symbol-list ()
 445   "Return value of list of known symbols in Metafont or MetaPost mode.
 446 If the list was changed, sort the list and remove duplicates first."
 447   (if (not meta-symbol-changed)
 448       ()
 449     (setq meta-symbol-changed nil)
 450     (message "Preparing completion list...")
 451     ;; sort list of symbols
 452     (setq meta-symbol-list
 453           (sort (mapcar 'meta-listify (apply 'append meta-symbol-list))
 454                 'meta-car-string-lessp))
 455     ;; remove duplicates
 456     (let ((entry meta-symbol-list))
 457       (while (and entry (cdr entry))
 458         (let ((this (car entry))
 459               (next (car (cdr entry))))
 460           (if (not (string-equal (car this) (car next)))
 461               (setq entry (cdr entry))
 462             (if (> (length next) (length this))
 463                 (setcdr this (cdr next)))
 464             (setcdr entry (cdr (cdr entry)))))))
 465     (message "Preparing completion list... done"))
 466   meta-symbol-list)
 467
 468 (defun meta-listify (a)
 469   ;; utility function used in `meta-add-symbols'
 470   (if (listp a) a (list a)))
 471
 472 (defun meta-car-string-lessp (a b)
 473   ;; utility function used in `meta-add-symbols'
 474   (string-lessp (car a) (car b)))
 475
 476
 477 (defun meta-complete-symbol ()
 478   "Perform completion on Metafont or MetaPost symbol preceding point."
 479   (interactive "*")
 480   (let ((list meta-complete-list)
 481         entry)
 482     (while list
 483       (setq entry (car list)
 484             list (cdr list))
 485       (if (meta-looking-at-backward (car entry) 200)
 486           (setq list nil)))
 487     (if (numberp (nth 1 entry))
 488         (let* ((sub (nth 1 entry))
 489                (close (nth 3 entry))
 490                (begin (match-beginning sub))
 491                (end (match-end sub))
 492                (pattern (meta-match-buffer 0))
 493                (symbol (buffer-substring begin end))
 494                (list (funcall (nth 2 entry)))
 495                (completion (try-completion symbol list)))
 496           (cond ((eq completion t)
 497                  (and close
 498                       (not (looking-at (regexp-quote close)))
 499                       (insert close)))
 500                 ((null completion)
 501                  (error "Can't find completion for \"%s\"" pattern))
 502                 ((not (string-equal symbol completion))
 503                  (delete-region begin end)
 504                  (insert completion)
 505                  (and close
 506                       (eq (try-completion completion list) t)
 507                       (not (looking-at (regexp-quote close)))
 508                       (insert close)))
 509                 (t
 510                  (message "Making completion list...")
 511                  (let ((list (all-completions symbol list nil)))
 512                    (with-output-to-temp-buffer "*Completions*"
 513                      (display-completion-list list symbol)))
 514                  (message "Making completion list... done"))))
 515       (funcall (nth 1 entry)))))
 516
 517
 518 (defun meta-looking-at-backward (regexp &optional limit)
 519   ;; utility function used in `meta-complete-symbol'
 520   (let ((pos (point)))
 521     (save-excursion
 522       (and (re-search-backward
 523             regexp (if limit (max (point-min) (- (point) limit))) t)
 524            (eq (match-end 0) pos)))))
 525
 526 (defun meta-match-buffer (n)
 527   ;; utility function used in `meta-complete-symbol'
 528   (if (match-beginning n)
 529       (let ((str (buffer-substring (match-beginning n) (match-end n))))
 530         (set-text-properties 0 (length str) nil str)
 531         (copy-sequence str))
 532     ""))
 533
 534
 535 \f
 536 ;;; Indentation.
 537
 538 (defcustom meta-indent-level 2
 539   "*Indentation of begin-end blocks in Metafont or MetaPost mode."
 540   :type 'integer
 541   :group 'meta-font)
 542
 543
 544 (defcustom meta-left-comment-regexp "%%+"
 545   "*Regexp matching comments that should be placed on the left margin."
 546   :type 'regexp
 547   :group 'meta-font)
 548
 549 (defcustom meta-right-comment-regexp nil
 550   "*Regexp matching comments that should be placed to the right margin."
 551   :type '(choice regexp
 552                  (const :tag "None" nil))
 553   :group 'meta-font)
 554
 555 (defcustom meta-ignore-comment-regexp "%[^%]"
 556   "*Regexp matching comments that whose indentation should not be touched."
 557   :type 'regexp
 558   :group 'meta-font)
 559
 560
 561 (defcustom meta-begin-environment-regexp
 562   (concat "\\(begin\\(char\\|fig\\|gr\\(aph\\|oup\\)\\|logochar\\)\\|"
 563           "def\\|for\\(\\|ever\\|suffixes\\)\\|if\\|mode_def\\|"
 564           "primarydef\\|secondarydef\\|tertiarydef\\|vardef\\)")
 565   "*Regexp matching the beginning of environments to be indented."
 566   :type 'regexp
 567   :group 'meta-font)
 568
 569 (defcustom meta-end-environment-regexp
 570   (concat "\\(end\\(char\\|def\\|f\\(ig\\|or\\)\\|gr\\(aph\\|oup\\)\\)"
 571           "\\|fi\\)")
 572   "*Regexp matching the end of environments to be indented."
 573   :type 'regexp
 574   :group 'meta-font)
 575
 576 (defcustom meta-within-environment-regexp
 577 ; (concat "\\(e\\(lse\\(\\|if\\)\\|xit\\(if\\|unless\\)\\)\\)")
 578   (concat "\\(else\\(\\|if\\)\\)")
 579   "*Regexp matching keywords within environments not to be indented."
 580   :type 'regexp
 581   :group 'meta-font)
 582
 583
 584 (defun meta-comment-indent ()
 585   "Return the indentation for a comment in Metafont or MetaPost mode."
 586   (if (and meta-left-comment-regexp
 587            (looking-at meta-left-comment-regexp))
 588       (current-column)
 589     (skip-chars-backward "\t\f ")
 590     (max (if (bolp) 0 (1+ (current-column)))
 591          comment-column)))
 592
 593 (defun meta-indent-line ()
 594   "Indent the line containing point as Metafont or MetaPost source."
 595   (interactive)
 596   (let ((indent (meta-indent-calculate)))
 597     (save-excursion
 598       (if (/= (current-indentation) indent)
 599           (let ((beg (progn (beginning-of-line) (point)))
 600                 (end (progn (back-to-indentation) (point))))
 601             (delete-region beg end)
 602             (indent-to indent))))
 603     (if (< (current-column) indent)
 604         (back-to-indentation))))
 605
 606 (defun meta-indent-calculate ()
 607   "Return the indentation of current line of Metafont or MetaPost source."
 608   ;; Indentation within strings is not considered as Meta* don't allow multi
 609   ;; line strings.
 610   (save-excursion
 611     (back-to-indentation)
 612     (cond
 613      ;; Comments to the left margin.
 614      ((and meta-left-comment-regexp
 615            (looking-at meta-left-comment-regexp))
 616       0)
 617      ;; Comments to the right margin.
 618      ((and meta-right-comment-regexp
 619            (looking-at meta-right-comment-regexp))
 620       comment-column)
 621      ;; Comments best left alone.
 622      ((and meta-ignore-comment-regexp
 623            (looking-at meta-ignore-comment-regexp))
 624       (current-indentation))
 625      ;; Beginning of buffer.
 626      ((eq (point-at-bol) (point-min))
 627       0)
 628      ;; Backindent at end of environments.
 629      ((meta-indent-looking-at-code
 630        (concat "\\<" meta-end-environment-regexp "\\>"))
 631       (- (meta-indent-current-indentation) meta-indent-level))
 632      ;; Backindent at keywords within environments.
 633      ((meta-indent-looking-at-code
 634        (concat "\\<" meta-within-environment-regexp "\\>"))
 635       (- (meta-indent-current-indentation) meta-indent-level))
 636      (t (meta-indent-current-indentation)))))
 637
 638 (defun meta-indent-in-string-p ()
 639   "Tell if the point is in a string."
 640   (or (nth 3 (syntax-ppss))
 641       (eq (get-text-property (point) 'face) font-lock-string-face)))
 642
 643 (defun meta-indent-looking-at-code (regexp)
 644   "Same as `looking-at' but checks that the point is not in a string."
 645   (unless (meta-indent-in-string-p)
 646     (looking-at regexp)))
 647
 648 (defun meta-indent-previous-line ()
 649   "Go to the previous line of code, skipping comments."
 650   (skip-chars-backward "\n\t\f ")
 651   (move-to-column (current-indentation))
 652   ;; Ignore comments.
 653   (while (and (looking-at comment-start) (not (bobp)))
 654     (skip-chars-backward "\n\t\f ")
 655     (when (not (bobp))
 656       (move-to-column (current-indentation)))))
 657
 658 (defun meta-indent-unfinished-line ()
 659   "Tell if the current line of code ends with an unfinished expression."
 660   (save-excursion
 661     (end-of-line)
 662     ;; Skip backward the comments.
 663     (let ((point-not-in-string (point)))
 664       (while (search-backward comment-start (point-at-bol) t)
 665         (unless (meta-indent-in-string-p)
 666           (setq point-not-in-string (point))))
 667       (goto-char point-not-in-string))
 668     ;; Search for the end of the previous expression.
 669     (if (search-backward ";" (point-at-bol) t)
 670         (progn (while (and (meta-indent-in-string-p)
 671                            (search-backward ";" (point-at-bol) t)))
 672                (if (= (char-after) ?\;)
 673                    (forward-char)
 674                  (beginning-of-line)))
 675       (beginning-of-line))
 676     ;; See if the last statement of the line is environment-related,
 677     ;; or exists at all.
 678     (if (meta-indent-looking-at-code
 679          (concat "[ \t\f]*\\($\\|" (regexp-quote comment-start)
 680                  "\\|\\<" meta-end-environment-regexp "\\>"
 681                  "\\|\\<" meta-begin-environment-regexp "\\>"
 682                  "\\|\\<" meta-within-environment-regexp "\\>\\)"))
 683         nil
 684       t)))
 685
 686 (defun meta-indent-current-indentation ()
 687   "Return the indentation wanted for the current line of code."
 688   (+ (meta-indent-current-nesting)
 689      (if (save-excursion
 690            (back-to-indentation)
 691            (and (not (looking-at (concat "\\<" meta-end-environment-regexp "\\>"
 692                                          "\\|\\<" meta-within-environment-regexp "\\>")))
 693                 (progn (meta-indent-previous-line)
 694                        (meta-indent-unfinished-line))))
 695          meta-indent-level
 696        0)))
 697
 698 (defun meta-indent-current-nesting ()
 699   "Return the indentation according to the nearest environment keyword."
 700   (save-excursion
 701     (save-restriction
 702       (widen)
 703       (back-to-indentation)
 704       (let ((to-add 0))
 705         ;; If we found some environment marker backward...
 706         (if (catch 'found
 707               (while (re-search-backward
 708                       (concat "(\\|)\\|\\<" meta-end-environment-regexp "\\>"
 709                               "\\|\\<" meta-begin-environment-regexp "\\>"
 710                               "\\|\\<" meta-within-environment-regexp "\\>")
 711                       nil t)
 712                 ;; If we aren't in a string or in a comment, we've found something.
 713                 (unless (or (meta-indent-in-string-p)
 714                             (nth 4 (syntax-ppss)))
 715                   (cond ((= (char-after) ?\()
 716                          (setq to-add (+ to-add meta-indent-level)))
 717                         ((= (char-after) ?\))
 718                          (setq to-add (- to-add meta-indent-level)))
 719                         (t (throw 'found t))))))
 720             (progn
 721               ;; ... then use it to compute the current indentation.
 722               (back-to-indentation)
 723               (+ to-add (current-indentation) (meta-indent-level-count)
 724                  ;; Compensate for backindent of end and within keywords.
 725                  (if (meta-indent-looking-at-code
 726                       (concat "\\<" meta-end-environment-regexp "\\>\\|"
 727                               "\\<" meta-within-environment-regexp "\\>"))
 728                      meta-indent-level
 729                    ;; Compensate for unfinished line.
 730                    (if (save-excursion
 731                          (meta-indent-previous-line)
 732                          (meta-indent-unfinished-line))
 733                        (- meta-indent-level)
 734                      0))))
 735           0)))))
 736
 737 (defun meta-indent-level-count ()
 738   "Count indentation change for begin-end commands in the current line."
 739   (save-excursion
 740     (save-restriction
 741       (let ((count 0))
 742         (narrow-to-region
 743          (point) (save-excursion
 744                    (re-search-forward "[^\\\\\"]%\\|\n\\|\\'" nil t)
 745                    (backward-char) (point)))
 746         (while (re-search-forward "\\<\\sw+\\>\\|(\\|)" nil t)
 747           (save-excursion
 748             (goto-char (match-beginning 0))
 749             (cond
 750              ;; Count number of begin-end keywords within line.
 751              ((meta-indent-looking-at-code
 752                (concat "\\<" meta-begin-environment-regexp "\\>"))
 753               (setq count (+ count meta-indent-level)))
 754              ((meta-indent-looking-at-code
 755                (concat "\\<" meta-end-environment-regexp "\\>"))
 756               (setq count (- count meta-indent-level))))))
 757         count))))
 758
 759
 760 \f
 761 ;;; Editing commands.
 762
 763 (defcustom meta-begin-defun-regexp
 764   (concat "\\(begin\\(char\\|fig\\|logochar\\)\\|def\\|mode_def\\|"
 765           "primarydef\\|secondarydef\\|tertiarydef\\|vardef\\)")
 766   "*Regexp matching beginning of defuns in Metafont or MetaPost mode."
 767   :type 'regexp
 768   :group 'meta-font)
 769
 770 (defcustom meta-end-defun-regexp
 771   (concat "\\(end\\(char\\|def\\|fig\\)\\)")
 772   "*Regexp matching the end of defuns in Metafont or MetaPost mode."
 773   :type 'regexp
 774   :group 'meta-font)
 775
 776
 777 (defun meta-beginning-of-defun (&optional arg)
 778   "Move backward to beginnning of a defun in Metafont or MetaPost code.
 779 With numeric argument, do it that many times.
 780 Negative arg -N means move forward to Nth following beginning of defun.
 781 Returns t unless search stops due to beginning or end of buffer."
 782   (interactive "p")
 783   (if (or (null arg) (= 0 arg)) (setq arg 1))
 784   (and arg (< arg 0) (not (eobp)) (forward-char 1))
 785   (and (re-search-backward
 786         (concat "\\<" meta-begin-defun-regexp "\\>") nil t arg)
 787        (progn (goto-char (match-beginning 0))
 788               (skip-chars-backward "%")
 789               (skip-chars-backward " \t\f") t)))
 790
 791 (defun meta-end-of-defun (&optional arg)
 792   "Move forward to end of a defun in Metafont or MetaPost code.
 793 With numeric argument, do it that many times.
 794 Negative argument -N means move back to Nth preceding end of defun.
 795 Returns t unless search stops due to beginning or end of buffer."
 796   (interactive "p")
 797   (if (or (null arg) (= 0 arg)) (setq arg 1))
 798   (and (< arg 0) (not (bobp)) (forward-line -1))
 799   (and (re-search-forward
 800         (concat "\\<" meta-end-defun-regexp "\\>") nil t arg)
 801        (progn (goto-char (match-end 0))
 802               (skip-chars-forward ";")
 803               (skip-chars-forward " \t\f")
 804               (if (looking-at "\n") (forward-line 1)) t)))
 805
 806
 807 (defun meta-comment-region (beg end &optional arg)
 808   "Comment out active region as Metafont or MetaPost source."
 809   (interactive "r")
 810   (comment-region beg end arg))
 811
 812 (defun meta-uncomment-region (beg end)
 813   "Uncomment active region as Metafont or MetaPost source."
 814   (interactive "r")
 815   (comment-region beg end -1))
 816
 817 (defun meta-comment-defun (&optional arg)
 818   "Comment out current environment as Metafont or MetaPost source.
 819 With prefix argument, uncomment the environment.
 820 The environment used is the one that contains point or follows point."
 821   (interactive "P")
 822   (save-excursion
 823     (let* ((end (if (meta-end-of-defun) (point) (point-max)))
 824            (beg (if (meta-beginning-of-defun) (point) (point-min))))
 825       (comment-region beg end arg))))
 826
 827 (defun meta-uncomment-defun ()
 828   "Uncomment current environment as Metafont or MetaPost source."
 829   (interactive)
 830   (meta-comment-defun -1))
 831
 832
 833 (defun meta-indent-region (beg end)
 834   "Indent the active region as Metafont or MetaPost source."
 835   (interactive "r")
 836   (indent-region beg end nil))
 837
 838 (defun meta-indent-buffer ()
 839   "Indent the whole buffer contents as Metafont or MetaPost source."
 840   (interactive)
 841   (save-excursion
 842     (indent-region (point-min) (point-max) nil)))
 843
 844 (defun meta-indent-defun ()
 845   "Indent the current environment as Metafont or MetaPost source.
 846 The environment indented is the one that contains point or follows point."
 847   (interactive)
 848   (save-excursion
 849     (let* ((end (if (meta-end-of-defun) (point) (point-max)))
 850            (beg (if (meta-beginning-of-defun) (point) (point-min))))
 851       (indent-region beg end nil))))
 852
 853
 854 (defun meta-mark-defun ()
 855   "Put mark at end of the environment, point at the beginning.
 856 The environment marked is the one that contains point or follows point."
 857   (interactive)
 858   (push-mark (point))
 859   (meta-end-of-defun)
 860   (push-mark (point) nil t)
 861   (meta-beginning-of-defun))
 862
 863
 864 \f
 865 ;;; Syntax table, keymap and menu.
 866
 867 (defvar meta-mode-abbrev-table nil
 868   "Abbrev table used in Metafont or MetaPost mode.")
 869 (define-abbrev-table 'meta-mode-abbrev-table ())
 870
 871 (defvar meta-mode-syntax-table
 872   (let ((st (make-syntax-table)))
 873     ;; underscores are word constituents
 874     (modify-syntax-entry ?_  "w"  st)
 875     ;; miscellaneous non-word symbols
 876     (modify-syntax-entry ?#  "_"  st)
 877     (modify-syntax-entry ?@  "_"  st)
 878     (modify-syntax-entry ?$  "_"  st)
 879     (modify-syntax-entry ??  "_"  st)
 880     (modify-syntax-entry ?!  "_"  st)
 881     ;; binary operators
 882     (modify-syntax-entry ?&  "."  st)
 883     (modify-syntax-entry ?+  "."  st)
 884     (modify-syntax-entry ?-  "."  st)
 885     (modify-syntax-entry ?/  "."  st)
 886     (modify-syntax-entry ?*  "."  st)
 887     (modify-syntax-entry ?.  "."  st)
 888     (modify-syntax-entry ?:  "."  st)
 889     (modify-syntax-entry ?=  "."  st)
 890     (modify-syntax-entry ?<  "."  st)
 891     (modify-syntax-entry ?>  "."  st)
 892     (modify-syntax-entry ?|  "."  st)
 893     ;; opening and closing delimiters
 894     (modify-syntax-entry ?\( "()" st)
 895     (modify-syntax-entry ?\) ")(" st)
 896     (modify-syntax-entry ?\[ "(]" st)
 897     (modify-syntax-entry ?\] ")[" st)
 898     (modify-syntax-entry ?\{ "(}" st)
 899     (modify-syntax-entry ?\} "){" st)
 900     ;; comment character
 901     (modify-syntax-entry ?%  "<"  st)
 902     (modify-syntax-entry ?\n ">"  st)
 903     ;; escape character, needed for embedded TeX code
 904     (modify-syntax-entry ?\\ "\\" st)
 905     st)
 906   "Syntax table used in Metafont or MetaPost mode.")
 907
 908 (defvar meta-mode-map
 909   (let ((map (make-sparse-keymap)))
 910     (define-key map "\C-m"      'reindent-then-newline-and-indent)
 911     ;; Comment Paragraphs:
 912     ;; (define-key map "\M-a"      'backward-sentence)
 913     ;; (define-key map "\M-e"      'forward-sentence)
 914     ;; (define-key map "\M-h"      'mark-paragraph)
 915     ;; (define-key map "\M-q"      'fill-paragraph)
 916     ;; Navigation:
 917     (define-key map "\M-\C-a"   'meta-beginning-of-defun)
 918     (define-key map "\M-\C-e"   'meta-end-of-defun)
 919     (define-key map "\M-\C-h"   'meta-mark-defun)
 920     ;; Indentation:
 921     (define-key map "\M-\C-q"   'meta-indent-defun)
 922     (define-key map "\C-c\C-qe" 'meta-indent-defun)
 923     (define-key map "\C-c\C-qr" 'meta-indent-region)
 924     (define-key map "\C-c\C-qb" 'meta-indent-buffer)
 925     ;; Commenting Out:
 926     (define-key map "\C-c%"     'meta-comment-defun)
 927     ;; (define-key map "\C-uC-c%"  'meta-uncomment-defun)
 928     (define-key map "\C-c;"     'meta-comment-region)
 929     (define-key map "\C-c:"     'meta-uncomment-region)
 930     ;; Symbol Completion:
 931     (define-key map "\M-\t"     'meta-complete-symbol)
 932     ;; Shell Commands:
 933     ;; (define-key map "\C-c\C-c"  'meta-command-file)
 934     ;; (define-key map "\C-c\C-k"  'meta-kill-job)
 935     ;; (define-key map "\C-c\C-l"  'meta-recenter-output)
 936     map)
 937   "Keymap used in Metafont or MetaPost mode.")
 938
 939
 940 (easy-menu-define
 941  meta-mode-menu meta-mode-map
 942  "Menu used in Metafont or MetaPost mode."
 943  (list "Meta"
 944        ["Forward Environment"           meta-beginning-of-defun t]
 945        ["Backward Environment"          meta-end-of-defun t]
 946        "--"
 947        ["Indent Line"                   meta-indent-line t]
 948        ["Indent Environment"            meta-indent-defun t]
 949        ["Indent Region"                 meta-indent-region
 950         :active (meta-mark-active)]
 951        ["Indent Buffer"                 meta-indent-buffer t]
 952        "--"
 953        ["Comment Out Environment"       meta-comment-defun t]
 954        ["Uncomment Environment"         meta-uncomment-defun t]
 955        ["Comment Out Region"            meta-comment-region
 956         :active (meta-mark-active)]
 957        ["Uncomment Region"              meta-uncomment-region
 958         :active (meta-mark-active)]
 959        "--"
 960        ["Complete Symbol"               meta-complete-symbol t]
 961 ;      "--"
 962 ;      ["Command on Buffer"             meta-command-file t]
 963 ;      ["Kill Job"                      meta-kill-job t]
 964 ;      ["Recenter Output Buffer"        meta-recenter-output-buffer t]
 965        ))
 966
 967 ;; Compatibility: XEmacs doesn't have the  `mark-active' variable.
 968 (defun meta-mark-active ()
 969   "Return whether the mark and region are currently active in this buffer."
 970   (if (boundp 'mark-active) mark-active (mark)))
 971
 972
 973 \f
 974 ;;; Hook variables.
 975
 976 (defcustom meta-mode-load-hook nil
 977   "*Hook evaluated when first loading Metafont or MetaPost mode."
 978   :type 'hook
 979   :group 'meta-font)
 980
 981 (defcustom meta-common-mode-hook nil
 982   "*Hook evaluated by both `metafont-mode' and `metapost-mode'."
 983   :type 'hook
 984   :group 'meta-font)
 985
 986 (defcustom metafont-mode-hook nil
 987   "*Hook evaluated by `metafont-mode' after `meta-common-mode-hook'."
 988   :type 'hook
 989   :group 'meta-font)
 990 (defcustom metapost-mode-hook nil
 991   "*Hook evaluated by `metapost-mode' after `meta-common-mode-hook'."
 992   :type 'hook
 993   :group 'meta-font)
 994
 995
 996 \f
 997 ;;; Initialization.
 998
 999 (defun meta-common-initialization ()
1000   "Common initialization for Metafont or MetaPost mode."
1001   (kill-all-local-variables)
1002
1003   (make-local-variable 'paragraph-start)
1004   (make-local-variable 'paragraph-separate)
1005   (setq paragraph-start
1006         (concat page-delimiter "\\|$"))
1007   (setq paragraph-separate
1008         (concat page-delimiter "\\|$"))
1009
1010   (make-local-variable 'paragraph-ignore-fill-prefix)
1011   (setq paragraph-ignore-fill-prefix t)
1012
1013   (make-local-variable 'comment-start-skip)
1014   (make-local-variable 'comment-start)
1015   (make-local-variable 'comment-end)
1016   (make-local-variable 'comment-multi-line)
1017   (setq comment-start-skip "%+[ \t\f]*")
1018   (setq comment-start "%")
1019   (setq comment-end "")
1020   (setq comment-multi-line nil)
1021
1022   ;; We use `back-to-indentation' but \f is no indentation sign.
1023   (modify-syntax-entry ?\f "_   ")
1024
1025   (make-local-variable 'parse-sexp-ignore-comments)
1026   (setq parse-sexp-ignore-comments t)
1027
1028   (make-local-variable 'comment-indent-function)
1029   (setq comment-indent-function 'meta-comment-indent)
1030   (make-local-variable 'indent-line-function)
1031   (setq indent-line-function 'meta-indent-line)
1032   ;; No need to define a mode-specific 'indent-region-function.
1033   ;; Simply use the generic 'indent-region and 'comment-region.
1034
1035   ;; Set defaults for font-lock mode.
1036   (make-local-variable 'font-lock-defaults)
1037   (setq font-lock-defaults
1038         '(meta-font-lock-keywords
1039           nil nil ((?_ . "w")) nil
1040           (font-lock-comment-start-regexp . "%")))
1041
1042   ;; Activate syntax table, keymap and menu.
1043   (setq local-abbrev-table meta-mode-abbrev-table)
1044   (set-syntax-table meta-mode-syntax-table)
1045   (use-local-map meta-mode-map)
1046   (easy-menu-add meta-mode-menu)
1047   )
1048
1049
1050 ;;;###autoload
1051 (defun metafont-mode ()
1052   "Major mode for editing Metafont sources.
1053 Special commands:
1054 \\{meta-mode-map}
1055
1056 Turning on Metafont mode calls the value of the variables
1057 `meta-common-mode-hook' and `metafont-mode-hook'."
1058   (interactive)
1059   (meta-common-initialization)
1060   (setq mode-name "Metafont")
1061   (setq major-mode 'metafont-mode)
1062
1063   ;; Set defaults for completion function.
1064   (make-local-variable 'meta-symbol-list)
1065   (make-local-variable 'meta-symbol-changed)
1066   (make-local-variable 'meta-complete-list)
1067   (setq meta-symbol-list nil)
1068   (setq meta-symbol-changed nil)
1069   (apply 'meta-add-symbols metafont-symbol-list)
1070   (setq meta-complete-list
1071         (list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
1072               (list "" 'ispell-complete-word)))
1073   (run-mode-hooks 'meta-common-mode-hook 'metafont-mode-hook))
1074
1075 ;;;###autoload
1076 (defun metapost-mode ()
1077   "Major mode for editing MetaPost sources.
1078 Special commands:
1079 \\{meta-mode-map}
1080
1081 Turning on MetaPost mode calls the value of the variable
1082 `meta-common-mode-hook' and `metafont-mode-hook'."
1083   (interactive)
1084   (meta-common-initialization)
1085   (setq mode-name "MetaPost")
1086   (setq major-mode 'metapost-mode)
1087
1088   ;; Set defaults for completion function.
1089   (make-local-variable 'meta-symbol-list)
1090   (make-local-variable 'meta-symbol-changed)
1091   (make-local-variable 'meta-complete-list)
1092   (setq meta-symbol-list nil)
1093   (setq meta-symbol-changed nil)
1094   (apply 'meta-add-symbols metapost-symbol-list)
1095   (setq meta-complete-list
1096         (list (list "\\<\\(\\sw+\\)" 1 'meta-symbol-list)
1097               (list "" 'ispell-complete-word)))
1098   (run-mode-hooks 'meta-common-mode-hook 'metapost-mode-hook))
1099
1100
1101 ;;; Just in case ...
1102
1103 (provide 'meta-mode)
1104 (run-hooks 'meta-mode-load-hook)
1105
1106 ;; arch-tag: ec2916b2-3a83-4cf7-962d-d8019370c006
1107 ;;; meta-mode.el ends here