lisp/muse-regexps.el

   1 ;;; muse-regexps.el --- define regexps used by Muse
   2
   3 ;; Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
   4
   5 ;; This file is part of Emacs Muse.  It is not part of GNU Emacs.
   6
   7 ;; Emacs Muse is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published
   9 ;; by the Free Software Foundation; either version 2, or (at your
  10 ;; option) any later version.
  11
  12 ;; Emacs Muse is distributed in the hope that it will be useful, but
  13 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 ;; General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with Emacs Muse; see the file COPYING.  If not, write to the
  19 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 ;; Boston, MA 02110-1301, USA.
  21
  22 ;;; Commentary:
  23
  24 ;; This file is the part of the Muse project that describes regexps
  25 ;; that are used throughout the project.
  26
  27 ;;; Contributors:
  28
  29 ;;; Code:
  30
  31 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  32 ;;
  33 ;; Muse Regular Expressions
  34 ;;
  35 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  36
  37 (defgroup muse-regexp nil
  38   "Regular expressions used in publishing and syntax highlighting."
  39   :group 'muse)
  40
  41 ;;; Deal with the lack of character classes for regexps in Emacs21 and
  42 ;;; XEmacs
  43
  44 (defcustom muse-regexp-use-character-classes 'undecided
  45   "Indicate whether to use extended character classes like [:space:].
  46 If 'undecided, Muse will use them if your emacs is known to support them.
  47
  48 Emacs 22 and Emacs 21.3.50 are known to support them.  XEmacs
  49 does not support them.
  50
  51 Emacs 21.2 or higher support them, but with enough annoying edge
  52 cases that the sanest default is to leave them disabled."
  53   :type '(choice (const :tag "Yes" t)
  54                  (const :tag "No" nil)
  55                  (const :tag "Let Muse decide" undecided))
  56   :group 'muse-regexp)
  57
  58 (defvar muse-regexp-emacs-revision
  59   (save-match-data
  60     (and (string-match "^[0-9]+\\.[0-9]+\\.\\([0-9]+\\)"
  61                        emacs-version)
  62          (match-string 1 emacs-version)
  63          (string-to-number (match-string 1 emacs-version))))
  64   "The revision number of this version of Emacs.")
  65
  66 (defun muse-extreg-usable-p ()
  67   "Return non-nil if extended character classes can be used,
  68 nil otherwise.
  69
  70 This is used when deciding the initial values of the muse-regexp
  71 options."
  72   (cond
  73    ((eq muse-regexp-use-character-classes t)
  74     t)
  75    ((eq muse-regexp-use-character-classes nil)
  76     nil)
  77    ((featurep 'xemacs) nil)             ; unusable on XEmacs
  78    ((> emacs-major-version 21) t)       ; usable if > 21
  79    ((< emacs-major-version 21) nil)
  80    ((< emacs-minor-version 3) nil)
  81    ;; don't use if version is of format 21.x
  82    ((null muse-regexp-emacs-revision) nil)
  83    ;; only trust 21.3.50 or higher
  84    ((>= muse-regexp-emacs-revision 50) t)
  85    (t nil)))
  86
  87 (defcustom muse-regexp-blank
  88   (if (muse-extreg-usable-p)
  89       "[:blank:]"
  90     " \t")
  91   "Regexp to use in place of \"[:blank:]\".
  92 This should be something that matches spaces and tabs.
  93
  94 It is like a regexp, but should be embeddable inside brackets.
  95 Muse will detect the appropriate value correctly most of
  96 the time."
  97   :type 'string
  98   :options '("[:blank:]" " \t")
  99   :group 'muse-regexp)
 100
 101 (defcustom muse-regexp-alnum
 102   (if (muse-extreg-usable-p)
 103       "[:alnum:]"
 104     "A-Za-z0-9")
 105   "Regexp to use in place of \"[:alnum:]\".
 106 This should be something that matches all letters and numbers.
 107
 108 It is like a regexp, but should be embeddable inside brackets.
 109 muse will detect the appropriate value correctly most of
 110 the time."
 111   :type 'string
 112   :options '("[:alnum:]" "A-Za-z0-9")
 113   :group 'muse-regexp)
 114
 115 (defcustom muse-regexp-lower
 116   (if (muse-extreg-usable-p)
 117       "[:lower:]"
 118     "a-z")
 119   "Regexp to use in place of \"[:lower:]\".
 120 This should match all lowercase characters.
 121
 122 It is like a regexp, but should be embeddable inside brackets.
 123 muse will detect the appropriate value correctly most of
 124 the time."
 125   :type 'string
 126   :options '("[:lower:]" "a-z")
 127   :group 'muse-regexp)
 128
 129 (defcustom muse-regexp-upper
 130   (if (muse-extreg-usable-p)
 131       "[:upper:]"
 132     "A-Z")
 133   "Regexp to use in place of \"[:upper:]\".
 134 This should match all uppercase characters.
 135
 136 It is like a regexp, but should be embeddable inside brackets.
 137 muse will detect the appropriate value correctly most of
 138 the time."
 139   :type 'string
 140   :options '("[:upper:]" "A-Z")
 141   :group 'muse-regexp)
 142
 143 ;;; Regexps used to define Muse publishing syntax
 144
 145 (defcustom muse-list-item-regexp
 146   (concat "^%s\\([" muse-regexp-blank "]-[" muse-regexp-blank
 147           "]*\\|[" muse-regexp-blank "][0-9]+\\.["
 148           muse-regexp-blank "]*\\|\\([^\n" muse-regexp-blank "].*?\\)?"
 149           "::\\(?:[" muse-regexp-blank "]+\\|$\\)\\)")
 150   "Regexp used to match the beginning of a list item.
 151 The '%s' will be replaced with a whitespace regexp when publishing."
 152   :type 'regexp
 153   :group 'muse-regexp)
 154
 155 (defcustom muse-dl-term-regexp
 156   (concat "[" muse-regexp-blank "]*\\(.+?\\)["
 157           muse-regexp-blank "]+::\\(?:[" muse-regexp-blank "]+\\|$\\)")
 158   "Regexp used to match a definition list term.
 159 The first match string must contain the term."
 160   :type 'regexp
 161   :group 'muse-regexp)
 162
 163 (defcustom muse-table-field-regexp
 164   (concat "[" muse-regexp-blank "]+\\(|+\\)\\(?:["
 165           muse-regexp-blank "]\\|$\\)")
 166   "Regexp used to match table separators when publishing."
 167   :type 'regexp
 168   :group 'muse-regexp)
 169
 170 (defcustom muse-table-line-regexp (concat "^.*" muse-table-field-regexp ".*")
 171   "Regexp used to match a table line when publishing."
 172   :type 'regexp
 173   :group 'muse-regexp)
 174
 175 (defcustom muse-tag-regexp
 176   (concat "<\\([^/" muse-regexp-blank "\n][^" muse-regexp-blank
 177           "</>\n]*\\)\\(\\s-+[^<>\n]+[^</>\n]\\)?\\(/\\)?>")
 178   "A regexp used to find XML-style tags within a buffer when publishing.
 179 Group 1 should be the tag name, group 2 the properties, and group
 180 3 the optional immediate ending slash."
 181   :type 'regexp
 182   :group 'muse-regexp)
 183
 184 (defcustom muse-explicit-link-regexp
 185   "\\[\\[\\([^][\n]+\\)\\]\\(?:\\[\\([^][\n]+\\)\\]\\)?\\]"
 186   "Regexp used to match [[target][description]] links.
 187 Paren group 1 must match the URL, and paren group 2 the description."
 188   :type 'regexp
 189   :group 'muse-regexp)
 190
 191 (defcustom muse-implicit-link-regexp
 192   (concat "\\([^" muse-regexp-blank "\n]+\\)")
 193   "Regexp used to match an implicit link.
 194 An implicit link is the largest block of text to be checked for
 195 URLs and bare WikiNames by the `muse-link-at-point' function.
 196 Paren group 1 is the text to be checked.
 197
 198 URLs are checked by default.  To get WikiNames, load
 199 muse-wiki.el.
 200
 201 This is only used when you are using muse-mode.el, but not
 202 muse-colors.el.
 203
 204 If the above applies, and you want to match things with spaces in
 205 them, you will have to modify this."
 206   :type 'regexp
 207   :group 'muse-regexp)
 208
 209 ;;; Regexps used to determine file types
 210
 211 (defcustom muse-file-regexp
 212   (concat "\\`[~/]\\|\\?\\|\\."
 213           "\\(html?\\|pdf\\|mp3\\|el\\|zip\\|txt\\|tar\\)"
 214           "\\(\\.\\(gz\\|bz2\\)\\)?\\'")
 215   "A link matching this regexp will be regarded as a link to a file."
 216   :type 'regexp
 217   :group 'muse-regexp)
 218
 219 (defcustom muse-image-regexp
 220   "\\.\\(eps\\|gif\\|jp\\(e?g\\)\\|p\\(bm\\|ng\\)\\|tiff\\|x\\([bp]m\\)\\)\\'"
 221   "A link matching this regexp will be published inline as an image.
 222 For example:
 223
 224   [[./wife.jpg][A picture of my wife]]
 225
 226 If you omit the description, the alt tag of the resulting HTML
 227 buffer will be the name of the file."
 228   :type 'regexp
 229   :group 'muse-regexp)
 230
 231 (provide 'muse-regexps)
 232
 233 ;;; muse-regexps.el ends here