lisp/hi-lock.el

   1 ;;; hi-lock.el --- minor mode for interactive automatic highlighting
   2
   3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005 Free Software Foundation, Inc.
   5
   6 ;; Author: David M. Koppelman, koppel@ee.lsu.edu
   7 ;; Keywords: faces, minor-mode, matching, display
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs 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 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27 ;;
  28 ;;  With the hi-lock commands text matching interactively entered
  29 ;;  regexp's can be highlighted.  For example, `M-x highlight-regexp
  30 ;;  RET clearly RET RET' will highlight all occurrences of `clearly'
  31 ;;  using a yellow background face.  New occurrences of `clearly' will
  32 ;;  be highlighted as they are typed.  `M-x unhighlight-regexp RET'
  33 ;;  will remove the highlighting.  Any existing face can be used for
  34 ;;  highlighting and a set of appropriate faces is provided.  The
  35 ;;  regexps can be written into the current buffer in a form that will
  36 ;;  be recognized the next time the corresponding file is read.
  37 ;;
  38 ;;  Applications:
  39 ;;
  40 ;;    In program source code highlight a variable to quickly see all
  41 ;;    places it is modified or referenced:
  42 ;;    M-x highlight-regexp ground_contact_switches_closed RET RET
  43 ;;
  44 ;;    In a shell or other buffer that is showing lots of program
  45 ;;    output, highlight the parts of the output you're interested in:
  46 ;;    M-x highlight-regexp Total execution time [0-9]+ RET hi-blue-b RET
  47 ;;
  48 ;;    In buffers displaying tables, highlight the lines you're interested in:
  49 ;;    M-x highlight-lines-matching-regexp January 2000 RET hi-black-b RET
  50 ;;
  51 ;;    When writing text, highlight personal cliches.  This can be
  52 ;;    amusing.
  53 ;;    M-x highlight-phrase as can be seen RET RET
  54 ;;
  55 ;;  Setup:
  56 ;;
  57 ;;    Put the following code in your .emacs file.  This turns on
  58 ;;    hi-lock mode and adds a "Regexp Highlighting" entry
  59 ;;    to the edit menu.
  60 ;;
  61 ;;    (hi-lock-mode 1)
  62 ;;
  63 ;;    You might also want to bind the hi-lock commands to more
  64 ;;    finger-friendly sequences:
  65
  66 ;;    (define-key hi-lock-map "\C-z\C-h" 'highlight-lines-matching-regexp)
  67 ;;    (define-key hi-lock-map "\C-zi" 'hi-lock-find-patterns)
  68 ;;    (define-key hi-lock-map "\C-zh" 'highlight-regexp)
  69 ;;    (define-key hi-lock-map "\C-zp" 'highlight-phrase)
  70 ;;    (define-key hi-lock-map "\C-zr" 'unhighlight-regexp)
  71 ;;    (define-key hi-lock-map "\C-zb" 'hi-lock-write-interactive-patterns))
  72
  73 ;;    See the documentation for hi-lock-mode `C-h f hi-lock-mode' for
  74 ;;    additional instructions.
  75
  76 ;; Sample file patterns:
  77
  78 ; Hi-lock: (("^;;; .*" (0 (quote hi-black-hb) t)))
  79 ; Hi-lock: ( ("make-variable-buffer-\\(local\\)" (0 font-lock-keyword-face)(1 'italic append)))))
  80 ; Hi-lock: end
  81
  82 ;;; Code:
  83
  84 (eval-and-compile
  85   (require 'font-lock))
  86
  87 (defgroup hi-lock nil
  88   "Interactively add and remove font-lock patterns for highlighting text."
  89   :link '(custom-manual "(emacs)Highlight Interactively")
  90   :group 'font-lock)
  91
  92 (defcustom hi-lock-file-patterns-range 10000
  93   "Limit of search in a buffer for hi-lock patterns.
  94 When a file is visited and hi-lock mode is on patterns starting
  95 up to this limit are added to font-lock's patterns.  See documentation
  96 of functions `hi-lock-mode' and `hi-lock-find-patterns'."
  97   :type 'integer
  98   :group 'hi-lock)
  99
 100 (defcustom hi-lock-exclude-modes
 101   '(rmail-mode mime/viewer-mode gnus-article-mode)
 102   "List of major modes in which hi-lock will not run.
 103 For security reasons since font lock patterns can specify function
 104 calls."
 105   :type '(repeat symbol)
 106   :group 'hi-lock)
 107
 108
 109 (defgroup hi-lock-faces nil
 110   "Faces for hi-lock."
 111   :group 'hi-lock
 112   :group 'faces)
 113
 114 (defface hi-yellow
 115   '((((min-colors 88) (background dark))
 116      (:background "yellow1" :foreground "black"))
 117     (((background dark)) (:background "yellow" :foreground "black"))
 118     (((min-colors 88)) (:background "yellow1"))
 119     (t (:background "yellow")))
 120   "Default face for hi-lock mode."
 121   :group 'hi-lock-faces)
 122
 123 (defface hi-pink
 124   '((((background dark)) (:background "pink" :foreground "black"))
 125     (t (:background "pink")))
 126   "Face for hi-lock mode."
 127   :group 'hi-lock-faces)
 128
 129 (defface hi-green
 130   '((((min-colors 88) (background dark))
 131      (:background "green1" :foreground "black"))
 132     (((background dark)) (:background "green" :foreground "black"))
 133     (((min-colors 88)) (:background "green1"))
 134     (t (:background "green")))
 135   "Face for hi-lock mode."
 136   :group 'hi-lock-faces)
 137
 138 (defface hi-blue
 139   '((((background dark)) (:background "light blue" :foreground "black"))
 140     (t (:background "light blue")))
 141   "Face for hi-lock mode."
 142   :group 'hi-lock-faces)
 143
 144 (defface hi-black-b
 145   '((t (:weight bold)))
 146   "Face for hi-lock mode."
 147   :group 'hi-lock-faces)
 148
 149 (defface hi-blue-b
 150   '((((min-colors 88)) (:weight bold :foreground "blue1"))
 151     (t (:weight bold :foreground "blue")))
 152   "Face for hi-lock mode."
 153   :group 'hi-lock-faces)
 154
 155 (defface hi-green-b
 156   '((((min-colors 88)) (:weight bold :foreground "green1"))
 157     (t (:weight bold :foreground "green")))
 158   "Face for hi-lock mode."
 159   :group 'hi-lock-faces)
 160
 161 (defface hi-red-b
 162   '((((min-colors 88)) (:weight bold :foreground "red1"))
 163     (t (:weight bold :foreground "red")))
 164   "Face for hi-lock mode."
 165   :group 'hi-lock-faces)
 166
 167 (defface hi-black-hb
 168   '((t (:weight bold :height 1.67 :inherit variable-pitch)))
 169   "Face for hi-lock mode."
 170   :group 'hi-lock-faces)
 171
 172 (defvar hi-lock-file-patterns nil
 173   "Patterns found in file for hi-lock.  Should not be changed.")
 174
 175 (defvar hi-lock-interactive-patterns nil
 176   "Patterns provided to hi-lock by user.  Should not be changed.")
 177
 178 (defvar hi-lock-face-history
 179   (list "hi-yellow" "hi-pink" "hi-green" "hi-blue" "hi-black-b"
 180         "hi-blue-b" "hi-red-b" "hi-green-b" "hi-black-hb")
 181       "History list of faces for hi-lock interactive functions.")
 182
 183 ;(dolist (f hi-lock-face-history) (unless (facep f) (error "%s not a face" f)))
 184
 185 (defvar hi-lock-regexp-history nil
 186   "History of regexps used for interactive fontification.")
 187
 188 (defvar hi-lock-file-patterns-prefix "Hi-lock"
 189   "Regexp for finding hi-lock patterns at top of file.")
 190
 191 (make-variable-buffer-local 'hi-lock-interactive-patterns)
 192 (put 'hi-lock-interactive-patterns 'permanent-local t)
 193 (make-variable-buffer-local 'hi-lock-regexp-history)
 194 (put 'hi-lock-regexp-history 'permanent-local t)
 195 (make-variable-buffer-local 'hi-lock-file-patterns)
 196 (put 'hi-lock-file-patterns 'permanent-local t)
 197
 198 (defvar hi-lock-menu (make-sparse-keymap "Hi Lock")
 199   "Menu for hi-lock mode.")
 200
 201 (define-key-after hi-lock-menu [highlight-regexp]
 202   '(menu-item "Highlight Regexp..." highlight-regexp
 203               :help "Highlight text matching PATTERN (a regexp)."))
 204
 205 (define-key-after hi-lock-menu [highlight-phrase]
 206   '(menu-item "Highlight Phrase..." highlight-phrase
 207               :help "Highlight text matching PATTERN (a regexp processed to match phrases)."))
 208
 209 (define-key-after hi-lock-menu [highlight-lines-matching-regexp]
 210   '(menu-item "Highlight Lines..." highlight-lines-matching-regexp
 211               :help "Highlight lines containing match of PATTERN (a regexp).."))
 212
 213 (define-key-after hi-lock-menu [unhighlight-regexp]
 214   '(menu-item "Remove Highlighting..." unhighlight-regexp
 215               :help "Remove previously entered highlighting pattern."
 216               :enable hi-lock-interactive-patterns))
 217
 218 (define-key-after hi-lock-menu [hi-lock-write-interactive-patterns]
 219   '(menu-item "Patterns to Buffer" hi-lock-write-interactive-patterns
 220               :help "Insert interactively added REGEXPs into buffer at point."
 221               :enable hi-lock-interactive-patterns))
 222
 223 (define-key-after hi-lock-menu [hi-lock-find-patterns]
 224   '(menu-item "Patterns from Buffer" hi-lock-find-patterns
 225               :help "Use patterns (if any) near top of buffer."))
 226
 227 (defvar hi-lock-map (make-sparse-keymap "Hi Lock")
 228   "Key map for hi-lock.")
 229
 230 (define-key hi-lock-map "\C-xwi" 'hi-lock-find-patterns)
 231 (define-key hi-lock-map "\C-xwl" 'highlight-lines-matching-regexp)
 232 (define-key hi-lock-map "\C-xwp" 'highlight-phrase)
 233 (define-key hi-lock-map "\C-xwh" 'highlight-regexp)
 234 (define-key hi-lock-map "\C-xwr" 'unhighlight-regexp)
 235 (define-key hi-lock-map "\C-xwb" 'hi-lock-write-interactive-patterns)
 236
 237 ;; Visible Functions
 238
 239
 240 ;;;###autoload
 241 (define-minor-mode hi-lock-buffer-mode
 242   "Toggle minor mode for interactively adding font-lock highlighting patterns.
 243
 244 If ARG positive turn hi-lock on.  Issuing a hi-lock command will also
 245 turn hi-lock on.  When hi-lock is turned on, a \"Regexp Highlighting\"
 246 submenu is added to the \"Edit\" menu.  The commands in the submenu,
 247 which can be called interactively, are:
 248
 249 \\[highlight-regexp] REGEXP FACE
 250   Highlight matches of pattern REGEXP in current buffer with FACE.
 251
 252 \\[highlight-phrase] PHRASE FACE
 253   Highlight matches of phrase PHRASE in current buffer with FACE.
 254   (PHRASE can be any REGEXP, but spaces will be replaced by matches
 255   to whitespace and initial lower-case letters will become case insensitive.)
 256
 257 \\[highlight-lines-matching-regexp] REGEXP FACE
 258   Highlight lines containing matches of REGEXP in current buffer with FACE.
 259
 260 \\[unhighlight-regexp] REGEXP
 261   Remove highlighting on matches of REGEXP in current buffer.
 262
 263 \\[hi-lock-write-interactive-patterns]
 264   Write active REGEXPs into buffer as comments (if possible). They will
 265   be read the next time file is loaded or when the \\[hi-lock-find-patterns] command
 266   is issued.  The inserted regexps are in the form of font lock keywords.
 267   (See `font-lock-keywords') They may be edited and re-loaded with \\[hi-lock-find-patterns],
 268   any valid `font-lock-keywords' form is acceptable.
 269
 270 \\[hi-lock-find-patterns]
 271   Re-read patterns stored in buffer (in the format produced by \\[hi-lock-write-interactive-patterns]).
 272
 273 When hi-lock is started and if the mode is not excluded, the
 274 beginning of the buffer is searched for lines of the form:
 275   Hi-lock: FOO
 276 where FOO is a list of patterns. These are added to the font lock keywords
 277 already present.  The patterns must start before position (number
 278 of characters into buffer) `hi-lock-file-patterns-range'.  Patterns
 279 will be read until
 280  Hi-lock: end
 281 is found. A mode is excluded if it's in the list `hi-lock-exclude-modes'."
 282   :group 'hi-lock
 283   :lighter " H"
 284   :global nil
 285   :keymap hi-lock-map
 286   (if hi-lock-buffer-mode
 287       ;; Turned on.
 288       (progn
 289         (unless font-lock-mode (font-lock-mode 1))
 290         (define-key-after menu-bar-edit-menu [hi-lock]
 291           (cons "Regexp Highlighting" hi-lock-menu))
 292         (hi-lock-find-patterns)
 293         (add-hook 'font-lock-mode-hook 'hi-lock-font-lock-hook nil t))
 294     ;; Turned off.
 295     (when (or hi-lock-interactive-patterns
 296               hi-lock-file-patterns)
 297       (when hi-lock-interactive-patterns
 298         (font-lock-remove-keywords nil hi-lock-interactive-patterns)
 299         (setq hi-lock-interactive-patterns nil))
 300       (when hi-lock-file-patterns
 301         (font-lock-remove-keywords nil hi-lock-file-patterns)
 302         (setq hi-lock-file-patterns nil))
 303       (if font-lock-mode
 304           (font-lock-fontify-buffer)))
 305     (define-key-after menu-bar-edit-menu [hi-lock] nil)
 306     (remove-hook 'font-lock-mode-hook 'hi-lock-font-lock-hook t)))
 307
 308 ;;;###autoload
 309 (define-global-minor-mode hi-lock-mode
 310   hi-lock-buffer-mode turn-on-hi-lock-if-enabled
 311   :group 'hi-lock)
 312
 313 (defun turn-on-hi-lock-if-enabled ()
 314   (unless (memq major-mode hi-lock-exclude-modes)
 315     (hi-lock-buffer-mode 1)))
 316
 317 ;;;###autoload
 318 (defalias 'highlight-lines-matching-regexp 'hi-lock-line-face-buffer)
 319 ;;;###autoload
 320 (defun hi-lock-line-face-buffer (regexp &optional face)
 321   "Set face of all lines containing a match of REGEXP to FACE.
 322
 323 Interactively, prompt for REGEXP then FACE.  Buffer-local history
 324 list maintained for regexps, global history maintained for faces.
 325 \\<minibuffer-local-map>Use \\[next-history-element] and \\[previous-history-element] to retrieve next or previous history item.
 326 \(See info node `Minibuffer History')"
 327   (interactive
 328    (list
 329     (hi-lock-regexp-okay
 330      (read-from-minibuffer "Regexp to highlight line: "
 331                            (cons (or (car hi-lock-regexp-history) "") 1 )
 332                            nil nil 'hi-lock-regexp-history))
 333     (hi-lock-read-face-name)))
 334   (or (facep face) (setq face 'hi-yellow))
 335   (unless hi-lock-buffer-mode (hi-lock-buffer-mode 1))
 336   (hi-lock-set-pattern
 337    ;; The \\(?:...\\) grouping construct ensures that a leading ^, +, * or ?
 338    ;; or a trailing $ in REGEXP will be interpreted correctly.
 339    (concat "^.*\\(?:" regexp "\\).*$") face))
 340
 341
 342 ;;;###autoload
 343 (defalias 'highlight-regexp 'hi-lock-face-buffer)
 344 ;;;###autoload
 345 (defun hi-lock-face-buffer (regexp &optional face)
 346   "Set face of each match of REGEXP to FACE.
 347
 348 Interactively, prompt for REGEXP then FACE.  Buffer-local history
 349 list maintained for regexps, global history maintained for faces.
 350 \\<minibuffer-local-map>Use \\[next-history-element] and \\[previous-history-element] to retrieve next or previous history item.
 351 \(See info node `Minibuffer History')"
 352   (interactive
 353    (list
 354     (hi-lock-regexp-okay
 355      (read-from-minibuffer "Regexp to highlight: "
 356                            (cons (or (car hi-lock-regexp-history) "") 1 )
 357                            nil nil 'hi-lock-regexp-history))
 358     (hi-lock-read-face-name)))
 359   (or (facep face) (setq face 'hi-yellow))
 360   (unless hi-lock-buffer-mode (hi-lock-buffer-mode 1))
 361   (hi-lock-set-pattern regexp face))
 362
 363 ;;;###autoload
 364 (defalias 'highlight-phrase 'hi-lock-face-phrase-buffer)
 365 ;;;###autoload
 366 (defun hi-lock-face-phrase-buffer (regexp &optional face)
 367   "Set face of each match of phrase REGEXP to FACE.
 368
 369 Whitespace in REGEXP converted to arbitrary whitespace and initial
 370 lower-case letters made case insensitive."
 371   (interactive
 372    (list
 373     (hi-lock-regexp-okay
 374      (hi-lock-process-phrase
 375       (read-from-minibuffer "Phrase to highlight: "
 376                             (cons (or (car hi-lock-regexp-history) "") 1 )
 377                             nil nil 'hi-lock-regexp-history)))
 378     (hi-lock-read-face-name)))
 379   (or (facep face) (setq face 'hi-yellow))
 380   (unless hi-lock-buffer-mode (hi-lock-buffer-mode 1))
 381   (hi-lock-set-pattern regexp face))
 382
 383 ;;;###autoload
 384 (defalias 'unhighlight-regexp 'hi-lock-unface-buffer)
 385 ;;;###autoload
 386 (defun hi-lock-unface-buffer (regexp)
 387   "Remove highlighting of each match to REGEXP set by hi-lock.
 388
 389 Interactively, prompt for REGEXP.  Buffer-local history of inserted
 390 regexp's maintained.  Will accept only regexps inserted by hi-lock
 391 interactive functions.  \(See `hi-lock-interactive-patterns'.\)
 392 \\<minibuffer-local-must-match-map>Use \\[minibuffer-complete] to complete a partially typed regexp.
 393 \(See info node `Minibuffer History'.\)"
 394   (interactive
 395    (if (and (display-popup-menus-p) (vectorp (this-command-keys)))
 396        (catch 'snafu
 397          (or
 398           (x-popup-menu
 399            t
 400            (cons
 401             `keymap
 402             (cons "Select Pattern to Unhighlight"
 403                   (mapcar (lambda (pattern)
 404                             (list (car pattern)
 405                                   (format
 406                                    "%s (%s)" (car pattern)
 407                                    (symbol-name
 408                                     (car
 409                                      (cdr (car (cdr (car (cdr pattern))))))))
 410                                   (cons nil nil)
 411                                   (car pattern)))
 412                           hi-lock-interactive-patterns))))
 413           ;; If the user clicks outside the menu, meaning that they
 414           ;; change their mind, x-popup-menu returns nil, and
 415           ;; interactive signals a wrong number of arguments error.
 416           ;; To prevent that, we return an empty string, which will
 417           ;; effectively disable the rest of the function.
 418           (throw 'snafu '(""))))
 419      (let ((history-list (mapcar (lambda (p) (car p))
 420                                  hi-lock-interactive-patterns)))
 421        (unless hi-lock-interactive-patterns
 422          (error "No highlighting to remove"))
 423        (list
 424         (completing-read "Regexp to unhighlight: "
 425                          hi-lock-interactive-patterns nil t
 426                          (car (car hi-lock-interactive-patterns))
 427                          (cons 'history-list 1))))))
 428   (let ((keyword (assoc regexp hi-lock-interactive-patterns)))
 429     (when keyword
 430       (font-lock-remove-keywords nil (list keyword))
 431       (setq hi-lock-interactive-patterns
 432             (delq keyword hi-lock-interactive-patterns))
 433       (font-lock-fontify-buffer))))
 434
 435 ;;;###autoload
 436 (defun hi-lock-write-interactive-patterns ()
 437   "Write interactively added patterns, if any, into buffer at point.
 438
 439 Interactively added patterns are those normally specified using
 440 `highlight-regexp' and `highlight-lines-matching-regexp'; they can
 441 be found in variable `hi-lock-interactive-patterns'."
 442   (interactive)
 443   (if (null hi-lock-interactive-patterns)
 444       (error "There are no interactive patterns"))
 445   (let ((beg (point)))
 446     (mapcar
 447      (lambda (pattern)
 448        (insert (format "Hi-lock: (%s)\n" (prin1-to-string pattern))))
 449      hi-lock-interactive-patterns)
 450     (comment-region beg (point)))
 451   (when (> (point) hi-lock-file-patterns-range)
 452     (warn "Inserted keywords not close enough to top of file")))
 453
 454 ;; Implementation Functions
 455
 456 (defun hi-lock-process-phrase (phrase)
 457   "Convert regexp PHRASE to a regexp that matches phrases.
 458
 459 Blanks in PHRASE replaced by regexp that matches arbitrary whitespace
 460 and initial lower-case letters made case insensitive."
 461   (let ((mod-phrase nil))
 462     (setq mod-phrase
 463           (replace-regexp-in-string
 464            "\\<[a-z]" (lambda (m) (format "[%s%s]" (upcase m) m)) phrase))
 465     (setq mod-phrase
 466           (replace-regexp-in-string
 467            "\\s-+" "[ \t\n]+" mod-phrase nil t))))
 468
 469 (defun hi-lock-regexp-okay (regexp)
 470   "Return REGEXP if it appears suitable for a font-lock pattern.
 471
 472 Otherwise signal an error.  A pattern that matches the null string is
 473 not suitable."
 474   (if (string-match regexp "")
 475       (error "Regexp cannot match an empty string")
 476     regexp))
 477
 478 (defun hi-lock-read-face-name ()
 479   "Read face name from minibuffer with completion and history."
 480   (intern (completing-read
 481            "Highlight using face: "
 482            obarray 'facep t
 483            (cons (car hi-lock-face-history)
 484                  (let ((prefix
 485                         (try-completion
 486                          (substring (car hi-lock-face-history) 0 1)
 487                          (mapcar (lambda (f) (cons f f))
 488                                  hi-lock-face-history))))
 489                    (if (and (stringp prefix)
 490                             (not (equal prefix (car hi-lock-face-history))))
 491                        (length prefix) 0)))
 492            '(hi-lock-face-history . 0))))
 493
 494 (defun hi-lock-set-pattern (regexp face)
 495   "Highlight REGEXP with face FACE."
 496   (let ((pattern (list regexp (list 0 (list 'quote face) t))))
 497     (unless (member pattern hi-lock-interactive-patterns)
 498       (font-lock-add-keywords nil (list pattern))
 499       (push pattern hi-lock-interactive-patterns)
 500       (let ((buffer-undo-list t)
 501             (inhibit-read-only t)
 502             (mod (buffer-modified-p)))
 503         (save-excursion
 504           (goto-char (point-min))
 505           (while (re-search-forward regexp (point-max) t)
 506             (put-text-property
 507              (match-beginning 0) (match-end 0) 'face face)
 508             (goto-char (match-end 0))))
 509         (set-buffer-modified-p mod)))))
 510
 511 (defun hi-lock-set-file-patterns (patterns)
 512   "Replace file patterns list with PATTERNS and refontify."
 513   (when (or hi-lock-file-patterns patterns)
 514     (font-lock-remove-keywords nil hi-lock-file-patterns)
 515     (setq hi-lock-file-patterns patterns)
 516     (font-lock-add-keywords nil hi-lock-file-patterns)
 517     (font-lock-fontify-buffer)))
 518
 519 (defun hi-lock-find-patterns ()
 520   "Find patterns in current buffer for hi-lock."
 521   (interactive)
 522   (unless (memq major-mode hi-lock-exclude-modes)
 523     (let ((all-patterns nil)
 524           (target-regexp (concat "\\<" hi-lock-file-patterns-prefix ":")))
 525       (save-excursion
 526         (save-restriction
 527           (widen)
 528           (goto-char (point-min))
 529           (re-search-forward target-regexp
 530                              (+ (point) hi-lock-file-patterns-range) t)
 531           (beginning-of-line)
 532           (while (and (re-search-forward target-regexp (+ (point) 100) t)
 533                       (not (looking-at "\\s-*end")))
 534             (condition-case nil
 535                 (setq all-patterns (append (read (current-buffer)) all-patterns))
 536               (error (message "Invalid pattern list expression at %d"
 537                               (line-number-at-pos)))))))
 538       (when hi-lock-buffer-mode (hi-lock-set-file-patterns all-patterns))
 539       (if (interactive-p)
 540         (message "Hi-lock added %d patterns." (length all-patterns))))))
 541
 542 (defun hi-lock-font-lock-hook ()
 543   "Add hi lock patterns to font-lock's."
 544   (if font-lock-mode
 545       (progn (font-lock-add-keywords nil hi-lock-file-patterns)
 546              (font-lock-add-keywords nil hi-lock-interactive-patterns))
 547     (hi-lock-buffer-mode -1)))
 548
 549 (provide 'hi-lock)
 550
 551 ;; arch-tag: d2e8fd07-4cc9-4c6f-a200-1e729bc54066
 552 ;;; hi-lock.el ends here