| 1 | ;;; apropos.el --- apropos commands for users and programmers |
| 2 | |
| 3 | ;; Copyright (C) 1989, 1994, 1995, 2001 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Joe Wells <jbw@bigbird.bu.edu> |
| 6 | ;; Rewritten: Daniel Pfeiffer <occitan@esperanto.org> |
| 7 | ;; Keywords: help |
| 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., 59 Temple Place - Suite 330, |
| 24 | ;; Boston, MA 02111-1307, USA. |
| 25 | |
| 26 | ;;; Commentary: |
| 27 | |
| 28 | ;; The ideas for this package were derived from the C code in |
| 29 | ;; src/keymap.c and elsewhere. The functions in this file should |
| 30 | ;; always be byte-compiled for speed. Someone should rewrite this in |
| 31 | ;; C (as part of src/keymap.c) for speed. |
| 32 | |
| 33 | ;; The idea for super-apropos is based on the original implementation |
| 34 | ;; by Lynn Slater <lrs@esl.com>. |
| 35 | |
| 36 | ;; History: |
| 37 | ;; Fixed bug, current-local-map can return nil. |
| 38 | ;; Change, doesn't calculate key-bindings unless needed. |
| 39 | ;; Added super-apropos capability, changed print functions. |
| 40 | ;;; Made fast-apropos and super-apropos share code. |
| 41 | ;;; Sped up fast-apropos again. |
| 42 | ;; Added apropos-do-all option. |
| 43 | ;;; Added fast-command-apropos. |
| 44 | ;; Changed doc strings to comments for helping functions. |
| 45 | ;;; Made doc file buffer read-only, buried it. |
| 46 | ;; Only call substitute-command-keys if do-all set. |
| 47 | |
| 48 | ;; Optionally use configurable faces to make the output more legible. |
| 49 | ;; Differentiate between command, function and macro. |
| 50 | ;; Apropos-command (ex command-apropos) does cmd and optionally user var. |
| 51 | ;; Apropos shows all 3 aspects of symbols (fn, var and plist) |
| 52 | ;; Apropos-documentation (ex super-apropos) now finds all it should. |
| 53 | ;; New apropos-value snoops through all values and optionally plists. |
| 54 | ;; Reading DOC file doesn't load nroff. |
| 55 | ;; Added hypertext following of documentation, mouse-2 on variable gives value |
| 56 | ;; from buffer in active window. |
| 57 | |
| 58 | ;;; Code: |
| 59 | |
| 60 | (require 'button) |
| 61 | |
| 62 | (defgroup apropos nil |
| 63 | "Apropos commands for users and programmers" |
| 64 | :group 'help |
| 65 | :prefix "apropos") |
| 66 | |
| 67 | ;; I see a degradation of maybe 10-20% only. |
| 68 | (defcustom apropos-do-all nil |
| 69 | "*Whether the apropos commands should do more. |
| 70 | |
| 71 | Slows them down more or less. Set this non-nil if you have a fast machine." |
| 72 | :group 'apropos |
| 73 | :type 'boolean) |
| 74 | |
| 75 | |
| 76 | (defcustom apropos-symbol-face 'bold |
| 77 | "*Face for symbol name in Apropos output, or nil for none." |
| 78 | :group 'apropos |
| 79 | :type 'face) |
| 80 | |
| 81 | (defcustom apropos-keybinding-face 'underline |
| 82 | "*Face for lists of keybinding in Apropos output, or nil for none." |
| 83 | :group 'apropos |
| 84 | :type 'face) |
| 85 | |
| 86 | (defcustom apropos-label-face 'italic |
| 87 | "*Face for label (`Command', `Variable' ...) in Apropos output. |
| 88 | A value of nil means don't use any special font for them, and also |
| 89 | turns off mouse highlighting." |
| 90 | :group 'apropos |
| 91 | :type 'face) |
| 92 | |
| 93 | (defcustom apropos-property-face 'bold-italic |
| 94 | "*Face for property name in apropos output, or nil for none." |
| 95 | :group 'apropos |
| 96 | :type 'face) |
| 97 | |
| 98 | (defcustom apropos-match-face 'secondary-selection |
| 99 | "*Face for matching text in Apropos documentation/value, or nil for none. |
| 100 | This applies when you look for matches in the documentation or variable value |
| 101 | for the regexp; the part that matches gets displayed in this font." |
| 102 | :group 'apropos |
| 103 | :type 'face) |
| 104 | |
| 105 | |
| 106 | (defvar apropos-mode-map |
| 107 | (let ((map (make-sparse-keymap))) |
| 108 | (set-keymap-parent map button-buffer-map) |
| 109 | ;; Use `apropos-follow' instead of just using the button |
| 110 | ;; definition of RET, so that users can use it anywhere in an |
| 111 | ;; apropos item, not just on top of a button. |
| 112 | (define-key map "\C-m" 'apropos-follow) |
| 113 | (define-key map " " 'scroll-up) |
| 114 | (define-key map "\177" 'scroll-down) |
| 115 | (define-key map "q" 'quit-window) |
| 116 | map) |
| 117 | "Keymap used in Apropos mode.") |
| 118 | |
| 119 | (defvar apropos-mode-hook nil |
| 120 | "*Hook run when mode is turned on.") |
| 121 | |
| 122 | (defvar apropos-regexp nil |
| 123 | "Regexp used in current apropos run.") |
| 124 | |
| 125 | (defvar apropos-files-scanned () |
| 126 | "List of elc files already scanned in current run of `apropos-documentation'.") |
| 127 | |
| 128 | (defvar apropos-accumulator () |
| 129 | "Alist of symbols already found in current apropos run.") |
| 130 | |
| 131 | (defvar apropos-item () |
| 132 | "Current item in or for `apropos-accumulator'.") |
| 133 | |
| 134 | \f |
| 135 | ;;; Button types used by apropos |
| 136 | |
| 137 | (define-button-type 'apropos-symbol |
| 138 | 'face apropos-symbol-face |
| 139 | 'help-echo "mouse-2, RET: Display more help on this symbol" |
| 140 | 'action #'apropos-symbol-button-display-help |
| 141 | 'skip t) |
| 142 | |
| 143 | (defun apropos-symbol-button-display-help (button) |
| 144 | "Display further help for the `apropos-symbol' button BUTTON." |
| 145 | (button-activate |
| 146 | (or (apropos-next-label-button (button-start button)) |
| 147 | (error "There is nothing to follow for `%s'" (button-label button))))) |
| 148 | |
| 149 | (define-button-type 'apropos-function |
| 150 | 'apropos-label "Function" |
| 151 | 'action (lambda (button) |
| 152 | (describe-function (button-get button 'apropos-symbol))) |
| 153 | 'help-echo "mouse-2, RET: Display more help on this function") |
| 154 | (define-button-type 'apropos-macro |
| 155 | 'apropos-label "Macro" |
| 156 | 'action (lambda (button) |
| 157 | (describe-function (button-get button 'apropos-symbol))) |
| 158 | 'help-echo "mouse-2, RET: Display more help on this macro") |
| 159 | (define-button-type 'apropos-command |
| 160 | 'apropos-label "Command" |
| 161 | 'action (lambda (button) |
| 162 | (describe-function (button-get button 'apropos-symbol))) |
| 163 | 'help-echo "mouse-2, RET: Display more help on this command") |
| 164 | |
| 165 | ;; We used to use `customize-variable-other-window' instead for a |
| 166 | ;; customizable variable, but that is slow. It is better to show an |
| 167 | ;; ordinary help buffer and let the user click on the customization |
| 168 | ;; button in that buffer, if he wants to. |
| 169 | ;; Likewise for `customize-face-other-window'. |
| 170 | (define-button-type 'apropos-variable |
| 171 | 'apropos-label "Variable" |
| 172 | 'help-echo "mouse-2, RET: Display more help on this variable" |
| 173 | 'action (lambda (button) |
| 174 | (describe-variable (button-get button 'apropos-symbol)))) |
| 175 | |
| 176 | (define-button-type 'apropos-face |
| 177 | 'apropos-label "Face" |
| 178 | 'help-echo "mouse-2, RET: Display more help on this face" |
| 179 | 'action (lambda (button) |
| 180 | (describe-face (button-get button 'apropos-symbol)))) |
| 181 | |
| 182 | (define-button-type 'apropos-group |
| 183 | 'apropos-label "Group" |
| 184 | 'help-echo "mouse-2, RET: Display more help on this group" |
| 185 | 'action (lambda (button) |
| 186 | (customize-variable-other-window |
| 187 | (button-get button 'apropos-symbol)))) |
| 188 | |
| 189 | (define-button-type 'apropos-widget |
| 190 | 'apropos-label "Widget" |
| 191 | 'help-echo "mouse-2, RET: Display more help on this widget" |
| 192 | 'action (lambda (button) |
| 193 | (widget-browse-other-window (button-get button 'apropos-symbol)))) |
| 194 | |
| 195 | (define-button-type 'apropos-plist |
| 196 | 'apropos-label "Plist" |
| 197 | 'help-echo "mouse-2, RET: Display more help on this plist" |
| 198 | 'action (lambda (button) |
| 199 | (apropos-describe-plist (button-get button 'apropos-symbol)))) |
| 200 | |
| 201 | (defun apropos-next-label-button (pos) |
| 202 | "Return the next apropos label button after POS, or nil if there's none. |
| 203 | Will also return nil if more than one `apropos-symbol' button is encountered |
| 204 | before finding a label." |
| 205 | (let* ((button (next-button pos t)) |
| 206 | (already-hit-symbol nil) |
| 207 | (label (and button (button-get button 'apropos-label))) |
| 208 | (type (and button (button-get button 'type)))) |
| 209 | (while (and button |
| 210 | (not label) |
| 211 | (or (not (eq type 'apropos-symbol)) |
| 212 | (not already-hit-symbol))) |
| 213 | (when (eq type 'apropos-symbol) |
| 214 | (setq already-hit-symbol t)) |
| 215 | (setq button (next-button (button-start button))) |
| 216 | (when button |
| 217 | (setq label (button-get button 'apropos-label)) |
| 218 | (setq type (button-get button 'type)))) |
| 219 | (and label button))) |
| 220 | |
| 221 | \f |
| 222 | ;;;###autoload |
| 223 | (define-derived-mode apropos-mode fundamental-mode "Apropos" |
| 224 | "Major mode for following hyperlinks in output of apropos commands. |
| 225 | |
| 226 | \\{apropos-mode-map}") |
| 227 | |
| 228 | ;;;###autoload |
| 229 | (defun apropos-variable (regexp &optional do-all) |
| 230 | "Show user variables that match REGEXP. |
| 231 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also show |
| 232 | normal variables." |
| 233 | (interactive (list (read-string |
| 234 | (concat "Apropos " |
| 235 | (if (or current-prefix-arg apropos-do-all) |
| 236 | "variable" |
| 237 | "user option") |
| 238 | " (regexp): ")) |
| 239 | current-prefix-arg)) |
| 240 | (apropos-command regexp nil |
| 241 | (if (or do-all apropos-do-all) |
| 242 | #'(lambda (symbol) |
| 243 | (and (boundp symbol) |
| 244 | (get symbol 'variable-documentation))) |
| 245 | 'user-variable-p))) |
| 246 | |
| 247 | ;; For auld lang syne: |
| 248 | ;;;###autoload |
| 249 | (fset 'command-apropos 'apropos-command) |
| 250 | ;;;###autoload |
| 251 | (defun apropos-command (apropos-regexp &optional do-all var-predicate) |
| 252 | "Show commands (interactively callable functions) that match APROPOS-REGEXP. |
| 253 | With optional prefix DO-ALL, or if `apropos-do-all' is non-nil, also show |
| 254 | noninteractive functions. |
| 255 | |
| 256 | If VAR-PREDICATE is non-nil, show only variables, and only those that |
| 257 | satisfy the predicate VAR-PREDICATE." |
| 258 | (interactive (list (read-string (concat |
| 259 | "Apropos command " |
| 260 | (if (or current-prefix-arg |
| 261 | apropos-do-all) |
| 262 | "or function ") |
| 263 | "(regexp): ")) |
| 264 | current-prefix-arg)) |
| 265 | (let ((message |
| 266 | (let ((standard-output (get-buffer-create "*Apropos*"))) |
| 267 | (print-help-return-message 'identity)))) |
| 268 | (or do-all (setq do-all apropos-do-all)) |
| 269 | (setq apropos-accumulator |
| 270 | (apropos-internal apropos-regexp |
| 271 | (or var-predicate |
| 272 | (if do-all 'functionp 'commandp)))) |
| 273 | (let ((tem apropos-accumulator)) |
| 274 | (while tem |
| 275 | (if (get (car tem) 'apropos-inhibit) |
| 276 | (setq apropos-accumulator (delq (car tem) apropos-accumulator))) |
| 277 | (setq tem (cdr tem)))) |
| 278 | (let ((p apropos-accumulator) |
| 279 | doc symbol) |
| 280 | (while p |
| 281 | (setcar p (list |
| 282 | (setq symbol (car p)) |
| 283 | (unless var-predicate |
| 284 | (if (functionp symbol) |
| 285 | (if (setq doc (documentation symbol t)) |
| 286 | (substring doc 0 (string-match "\n" doc)) |
| 287 | "(not documented)"))) |
| 288 | (and var-predicate |
| 289 | (funcall var-predicate symbol) |
| 290 | (if (setq doc (documentation-property |
| 291 | symbol 'variable-documentation t)) |
| 292 | (substring doc 0 |
| 293 | (string-match "\n" doc)))))) |
| 294 | (setq p (cdr p)))) |
| 295 | (and (apropos-print t nil) |
| 296 | message |
| 297 | (message message)))) |
| 298 | |
| 299 | |
| 300 | ;;;###autoload |
| 301 | (defun apropos (apropos-regexp &optional do-all) |
| 302 | "Show all bound symbols whose names match APROPOS-REGEXP. |
| 303 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also |
| 304 | show unbound symbols and key bindings, which is a little more |
| 305 | time-consuming. Returns list of symbols and documentation found." |
| 306 | (interactive "sApropos symbol (regexp): \nP") |
| 307 | (setq apropos-accumulator |
| 308 | (apropos-internal apropos-regexp |
| 309 | (and (not do-all) |
| 310 | (not apropos-do-all) |
| 311 | (lambda (symbol) |
| 312 | (or (fboundp symbol) |
| 313 | (boundp symbol) |
| 314 | (facep symbol) |
| 315 | (symbol-plist symbol)))))) |
| 316 | (let ((tem apropos-accumulator)) |
| 317 | (while tem |
| 318 | (if (get (car tem) 'apropos-inhibit) |
| 319 | (setq apropos-accumulator (delq (car tem) apropos-accumulator))) |
| 320 | (setq tem (cdr tem)))) |
| 321 | (let ((p apropos-accumulator) |
| 322 | symbol doc properties) |
| 323 | (while p |
| 324 | (setcar p (list |
| 325 | (setq symbol (car p)) |
| 326 | (when (fboundp symbol) |
| 327 | (if (setq doc (condition-case nil |
| 328 | (documentation symbol t) |
| 329 | (void-function |
| 330 | "(alias for undefined function)"))) |
| 331 | (substring doc 0 (string-match "\n" doc)) |
| 332 | "(not documented)")) |
| 333 | (when (boundp symbol) |
| 334 | (if (setq doc (documentation-property |
| 335 | symbol 'variable-documentation t)) |
| 336 | (substring doc 0 (string-match "\n" doc)) |
| 337 | "(not documented)")) |
| 338 | (when (setq properties (symbol-plist symbol)) |
| 339 | (setq doc (list (car properties))) |
| 340 | (while (setq properties (cdr (cdr properties))) |
| 341 | (setq doc (cons (car properties) doc))) |
| 342 | (mapconcat #'symbol-name (nreverse doc) " ")) |
| 343 | (when (get symbol 'widget-type) |
| 344 | (if (setq doc (documentation-property |
| 345 | symbol 'widget-documentation t)) |
| 346 | (substring doc 0 |
| 347 | (string-match "\n" doc)) |
| 348 | "(not documented)")) |
| 349 | (when (facep symbol) |
| 350 | (if (setq doc (documentation-property |
| 351 | symbol 'face-documentation t)) |
| 352 | (substring doc 0 |
| 353 | (string-match "\n" doc)) |
| 354 | "(not documented)")) |
| 355 | (when (get symbol 'custom-group) |
| 356 | (if (setq doc (documentation-property |
| 357 | symbol 'group-documentation t)) |
| 358 | (substring doc 0 |
| 359 | (string-match "\n" doc)) |
| 360 | "(not documented)")))) |
| 361 | (setq p (cdr p)))) |
| 362 | (apropos-print |
| 363 | (or do-all apropos-do-all) |
| 364 | nil)) |
| 365 | |
| 366 | |
| 367 | ;;;###autoload |
| 368 | (defun apropos-value (apropos-regexp &optional do-all) |
| 369 | "Show all symbols whose value's printed image matches APROPOS-REGEXP. |
| 370 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also looks |
| 371 | at the function and at the names and values of properties. |
| 372 | Returns list of symbols and values found." |
| 373 | (interactive "sApropos value (regexp): \nP") |
| 374 | (or do-all (setq do-all apropos-do-all)) |
| 375 | (setq apropos-accumulator ()) |
| 376 | (let (f v p) |
| 377 | (mapatoms |
| 378 | (lambda (symbol) |
| 379 | (setq f nil v nil p nil) |
| 380 | (or (memq symbol '(apropos-regexp do-all apropos-accumulator |
| 381 | symbol f v p)) |
| 382 | (setq v (apropos-value-internal 'boundp symbol 'symbol-value))) |
| 383 | (if do-all |
| 384 | (setq f (apropos-value-internal 'fboundp symbol 'symbol-function) |
| 385 | p (apropos-format-plist symbol "\n " t))) |
| 386 | (if (or f v p) |
| 387 | (setq apropos-accumulator (cons (list symbol f v p) |
| 388 | apropos-accumulator)))))) |
| 389 | (apropos-print nil "\n----------------\n")) |
| 390 | |
| 391 | |
| 392 | ;;;###autoload |
| 393 | (defun apropos-documentation (apropos-regexp &optional do-all) |
| 394 | "Show symbols whose documentation contain matches for APROPOS-REGEXP. |
| 395 | With optional prefix DO-ALL or if `apropos-do-all' is non-nil, also use |
| 396 | documentation that is not stored in the documentation file and show key |
| 397 | bindings. |
| 398 | Returns list of symbols and documentation found." |
| 399 | (interactive "sApropos documentation (regexp): \nP") |
| 400 | (or do-all (setq do-all apropos-do-all)) |
| 401 | (setq apropos-accumulator () apropos-files-scanned ()) |
| 402 | (let ((standard-input (get-buffer-create " apropos-temp")) |
| 403 | f v) |
| 404 | (unwind-protect |
| 405 | (save-excursion |
| 406 | (set-buffer standard-input) |
| 407 | (apropos-documentation-check-doc-file) |
| 408 | (if do-all |
| 409 | (mapatoms |
| 410 | (lambda (symbol) |
| 411 | (setq f (apropos-safe-documentation symbol) |
| 412 | v (get symbol 'variable-documentation)) |
| 413 | (if (integerp v) (setq v)) |
| 414 | (setq f (apropos-documentation-internal f) |
| 415 | v (apropos-documentation-internal v)) |
| 416 | (if (or f v) |
| 417 | (if (setq apropos-item |
| 418 | (cdr (assq symbol apropos-accumulator))) |
| 419 | (progn |
| 420 | (if f |
| 421 | (setcar apropos-item f)) |
| 422 | (if v |
| 423 | (setcar (cdr apropos-item) v))) |
| 424 | (setq apropos-accumulator |
| 425 | (cons (list symbol f v) |
| 426 | apropos-accumulator))))))) |
| 427 | (apropos-print nil "\n----------------\n")) |
| 428 | (kill-buffer standard-input)))) |
| 429 | |
| 430 | \f |
| 431 | (defun apropos-value-internal (predicate symbol function) |
| 432 | (if (funcall predicate symbol) |
| 433 | (progn |
| 434 | (setq symbol (prin1-to-string (funcall function symbol))) |
| 435 | (if (string-match apropos-regexp symbol) |
| 436 | (progn |
| 437 | (if apropos-match-face |
| 438 | (put-text-property (match-beginning 0) (match-end 0) |
| 439 | 'face apropos-match-face |
| 440 | symbol)) |
| 441 | symbol))))) |
| 442 | |
| 443 | (defun apropos-documentation-internal (doc) |
| 444 | (if (consp doc) |
| 445 | (apropos-documentation-check-elc-file (car doc)) |
| 446 | (and doc |
| 447 | (string-match apropos-regexp doc) |
| 448 | (progn |
| 449 | (if apropos-match-face |
| 450 | (put-text-property (match-beginning 0) |
| 451 | (match-end 0) |
| 452 | 'face apropos-match-face |
| 453 | (setq doc (copy-sequence doc)))) |
| 454 | doc)))) |
| 455 | |
| 456 | (defun apropos-format-plist (pl sep &optional compare) |
| 457 | (setq pl (symbol-plist pl)) |
| 458 | (let (p p-out) |
| 459 | (while pl |
| 460 | (setq p (format "%s %S" (car pl) (nth 1 pl))) |
| 461 | (if (or (not compare) (string-match apropos-regexp p)) |
| 462 | (if apropos-property-face |
| 463 | (put-text-property 0 (length (symbol-name (car pl))) |
| 464 | 'face apropos-property-face p)) |
| 465 | (setq p nil)) |
| 466 | (if p |
| 467 | (progn |
| 468 | (and compare apropos-match-face |
| 469 | (put-text-property (match-beginning 0) (match-end 0) |
| 470 | 'face apropos-match-face |
| 471 | p)) |
| 472 | (setq p-out (concat p-out (if p-out sep) p)))) |
| 473 | (setq pl (nthcdr 2 pl))) |
| 474 | p-out)) |
| 475 | |
| 476 | |
| 477 | ;; Finds all documentation related to APROPOS-REGEXP in internal-doc-file-name. |
| 478 | |
| 479 | (defun apropos-documentation-check-doc-file () |
| 480 | (let (type symbol (sepa 2) sepb beg end) |
| 481 | (insert ?\^_) |
| 482 | (backward-char) |
| 483 | (insert-file-contents (concat doc-directory internal-doc-file-name)) |
| 484 | (forward-char) |
| 485 | (while (save-excursion |
| 486 | (setq sepb (search-forward "\^_")) |
| 487 | (not (eobp))) |
| 488 | (beginning-of-line 2) |
| 489 | (if (save-restriction |
| 490 | (narrow-to-region (point) (1- sepb)) |
| 491 | (re-search-forward apropos-regexp nil t)) |
| 492 | (progn |
| 493 | (setq beg (match-beginning 0) |
| 494 | end (point)) |
| 495 | (goto-char (1+ sepa)) |
| 496 | (or (setq type (if (eq ?F (preceding-char)) |
| 497 | 1 ; function documentation |
| 498 | 2) ; variable documentation |
| 499 | symbol (read) |
| 500 | beg (- beg (point) 1) |
| 501 | end (- end (point) 1) |
| 502 | doc (buffer-substring (1+ (point)) (1- sepb)) |
| 503 | apropos-item (assq symbol apropos-accumulator)) |
| 504 | (setq apropos-item (list symbol nil nil) |
| 505 | apropos-accumulator (cons apropos-item |
| 506 | apropos-accumulator))) |
| 507 | (if apropos-match-face |
| 508 | (put-text-property beg end 'face apropos-match-face doc)) |
| 509 | (setcar (nthcdr type apropos-item) doc))) |
| 510 | (setq sepa (goto-char sepb))))) |
| 511 | |
| 512 | (defun apropos-documentation-check-elc-file (file) |
| 513 | (if (member file apropos-files-scanned) |
| 514 | nil |
| 515 | (let (symbol doc beg end this-is-a-variable) |
| 516 | (setq apropos-files-scanned (cons file apropos-files-scanned)) |
| 517 | (erase-buffer) |
| 518 | (insert-file-contents file) |
| 519 | (while (search-forward "\n#@" nil t) |
| 520 | ;; Read the comment length, and advance over it. |
| 521 | (setq end (read) |
| 522 | beg (1+ (point)) |
| 523 | end (+ (point) end -1)) |
| 524 | (forward-char) |
| 525 | (if (save-restriction |
| 526 | ;; match ^ and $ relative to doc string |
| 527 | (narrow-to-region beg end) |
| 528 | (re-search-forward apropos-regexp nil t)) |
| 529 | (progn |
| 530 | (goto-char (+ end 2)) |
| 531 | (setq doc (buffer-substring beg end) |
| 532 | end (- (match-end 0) beg) |
| 533 | beg (- (match-beginning 0) beg) |
| 534 | this-is-a-variable (looking-at "(def\\(var\\|const\\) ") |
| 535 | symbol (progn |
| 536 | (skip-chars-forward "(a-z") |
| 537 | (forward-char) |
| 538 | (read)) |
| 539 | symbol (if (consp symbol) |
| 540 | (nth 1 symbol) |
| 541 | symbol)) |
| 542 | (if (if this-is-a-variable |
| 543 | (get symbol 'variable-documentation) |
| 544 | (and (fboundp symbol) (apropos-safe-documentation symbol))) |
| 545 | (progn |
| 546 | (or (setq apropos-item (assq symbol apropos-accumulator)) |
| 547 | (setq apropos-item (list symbol nil nil) |
| 548 | apropos-accumulator (cons apropos-item |
| 549 | apropos-accumulator))) |
| 550 | (if apropos-match-face |
| 551 | (put-text-property beg end 'face apropos-match-face |
| 552 | doc)) |
| 553 | (setcar (nthcdr (if this-is-a-variable 2 1) |
| 554 | apropos-item) |
| 555 | doc))))))))) |
| 556 | |
| 557 | |
| 558 | |
| 559 | (defun apropos-safe-documentation (function) |
| 560 | "Like `documentation', except it avoids calling `get_doc_string'. |
| 561 | Will return nil instead." |
| 562 | (while (and function (symbolp function)) |
| 563 | (setq function (if (fboundp function) |
| 564 | (symbol-function function)))) |
| 565 | (if (eq (car-safe function) 'macro) |
| 566 | (setq function (cdr function))) |
| 567 | (setq function (if (byte-code-function-p function) |
| 568 | (if (> (length function) 4) |
| 569 | (aref function 4)) |
| 570 | (if (eq (car-safe function) 'autoload) |
| 571 | (nth 2 function) |
| 572 | (if (eq (car-safe function) 'lambda) |
| 573 | (if (stringp (nth 2 function)) |
| 574 | (nth 2 function) |
| 575 | (if (stringp (nth 3 function)) |
| 576 | (nth 3 function))))))) |
| 577 | (if (integerp function) |
| 578 | nil |
| 579 | function)) |
| 580 | |
| 581 | |
| 582 | (defun apropos-print (do-keys spacing) |
| 583 | "Output result of apropos searching into buffer `*Apropos*'. |
| 584 | The value of `apropos-accumulator' is the list of items to output. |
| 585 | Each element should have the format (SYMBOL FN-DOC VAR-DOC [PLIST-DOC]). |
| 586 | The return value is the list that was in `apropos-accumulator', sorted |
| 587 | alphabetically by symbol name; but this function also sets |
| 588 | `apropos-accumulator' to nil before returning. |
| 589 | |
| 590 | If SPACING is non-nil, it should be a string; |
| 591 | separate items with that string." |
| 592 | (if (null apropos-accumulator) |
| 593 | (message "No apropos matches for `%s'" apropos-regexp) |
| 594 | (setq apropos-accumulator |
| 595 | (sort apropos-accumulator (lambda (a b) |
| 596 | (string-lessp (car a) (car b))))) |
| 597 | (with-output-to-temp-buffer "*Apropos*" |
| 598 | (let ((p apropos-accumulator) |
| 599 | (old-buffer (current-buffer)) |
| 600 | symbol item) |
| 601 | (set-buffer standard-output) |
| 602 | (apropos-mode) |
| 603 | (if (display-mouse-p) |
| 604 | (insert "If moving the mouse over text changes the text's color,\n" |
| 605 | (substitute-command-keys |
| 606 | "you can click \\[push-button] on that text to get more information.\n"))) |
| 607 | (insert "In this buffer, go to the name of the command, or function," |
| 608 | " or variable,\n" |
| 609 | (substitute-command-keys |
| 610 | "and type \\[apropos-follow] to get full documentation.\n\n")) |
| 611 | (while (consp p) |
| 612 | (when (and spacing (not (bobp))) |
| 613 | (princ spacing)) |
| 614 | (setq apropos-item (car p) |
| 615 | symbol (car apropos-item) |
| 616 | p (cdr p)) |
| 617 | (insert-text-button (symbol-name symbol) |
| 618 | 'type 'apropos-symbol |
| 619 | ;; Can't use default, since user may have |
| 620 | ;; changed the variable! |
| 621 | ;; Just say `no' to variables containing faces! |
| 622 | 'face apropos-symbol-face) |
| 623 | ;; Calculate key-bindings if we want them. |
| 624 | (and do-keys |
| 625 | (commandp symbol) |
| 626 | (indent-to 30 1) |
| 627 | (if (let ((keys |
| 628 | (save-excursion |
| 629 | (set-buffer old-buffer) |
| 630 | (where-is-internal symbol))) |
| 631 | filtered) |
| 632 | ;; Copy over the list of key sequences, |
| 633 | ;; omitting any that contain a buffer or a frame. |
| 634 | (while keys |
| 635 | (let ((key (car keys)) |
| 636 | (i 0) |
| 637 | loser) |
| 638 | (while (< i (length key)) |
| 639 | (if (or (framep (aref key i)) |
| 640 | (bufferp (aref key i))) |
| 641 | (setq loser t)) |
| 642 | (setq i (1+ i))) |
| 643 | (or loser |
| 644 | (setq filtered (cons key filtered)))) |
| 645 | (setq keys (cdr keys))) |
| 646 | (setq item filtered)) |
| 647 | ;; Convert the remaining keys to a string and insert. |
| 648 | (insert |
| 649 | (mapconcat |
| 650 | (lambda (key) |
| 651 | (setq key (condition-case () |
| 652 | (key-description key) |
| 653 | (error))) |
| 654 | (if apropos-keybinding-face |
| 655 | (put-text-property 0 (length key) |
| 656 | 'face apropos-keybinding-face |
| 657 | key)) |
| 658 | key) |
| 659 | item ", ")) |
| 660 | (insert "M-x") |
| 661 | (put-text-property (- (point) 3) (point) |
| 662 | 'face apropos-keybinding-face) |
| 663 | (insert " " (symbol-name symbol) " ") |
| 664 | (insert "RET") |
| 665 | (put-text-property (- (point) 3) (point) |
| 666 | 'face apropos-keybinding-face))) |
| 667 | (terpri) |
| 668 | (apropos-print-doc 1 |
| 669 | (if (commandp symbol) |
| 670 | 'apropos-command |
| 671 | (if (apropos-macrop symbol) |
| 672 | 'apropos-macro |
| 673 | 'apropos-function)) |
| 674 | t) |
| 675 | (apropos-print-doc 2 'apropos-variable t) |
| 676 | (apropos-print-doc 6 'apropos-group t) |
| 677 | (apropos-print-doc 5 'apropos-face t) |
| 678 | (apropos-print-doc 4 'apropos-widget t) |
| 679 | (apropos-print-doc 3 'apropos-plist nil)) |
| 680 | (setq buffer-read-only t)))) |
| 681 | (prog1 apropos-accumulator |
| 682 | (setq apropos-accumulator ()))) ; permit gc |
| 683 | |
| 684 | |
| 685 | (defun apropos-macrop (symbol) |
| 686 | "T if SYMBOL is a Lisp macro." |
| 687 | (and (fboundp symbol) |
| 688 | (consp (setq symbol |
| 689 | (symbol-function symbol))) |
| 690 | (or (eq (car symbol) 'macro) |
| 691 | (if (eq (car symbol) 'autoload) |
| 692 | (memq (nth 4 symbol) |
| 693 | '(macro t)))))) |
| 694 | |
| 695 | |
| 696 | (defun apropos-print-doc (i type do-keys) |
| 697 | (if (stringp (setq i (nth i apropos-item))) |
| 698 | (progn |
| 699 | (insert " ") |
| 700 | (insert-text-button (button-type-get type 'apropos-label) |
| 701 | 'type type |
| 702 | ;; Can't use the default button face, since |
| 703 | ;; user may have changed the variable! |
| 704 | ;; Just say `no' to variables containing faces! |
| 705 | 'face apropos-label-face |
| 706 | 'apropos-symbol (car apropos-item)) |
| 707 | (insert ": ") |
| 708 | (insert (if do-keys (substitute-command-keys i) i)) |
| 709 | (or (bolp) (terpri))))) |
| 710 | |
| 711 | |
| 712 | (defun apropos-follow () |
| 713 | "Invokes any button at point, otherwise invokes the nearest label button." |
| 714 | (interactive) |
| 715 | (button-activate |
| 716 | (or (apropos-next-label-button (line-beginning-position)) |
| 717 | (error "There is nothing to follow here")))) |
| 718 | |
| 719 | |
| 720 | (defun apropos-describe-plist (symbol) |
| 721 | "Display a pretty listing of SYMBOL's plist." |
| 722 | (with-output-to-temp-buffer "*Help*" |
| 723 | (set-buffer standard-output) |
| 724 | (princ "Symbol ") |
| 725 | (prin1 symbol) |
| 726 | (princ "'s plist is\n (") |
| 727 | (if apropos-symbol-face |
| 728 | (put-text-property 8 (- (point) 14) 'face apropos-symbol-face)) |
| 729 | (insert (apropos-format-plist symbol "\n ")) |
| 730 | (princ ")") |
| 731 | (print-help-return-message))) |
| 732 | |
| 733 | |
| 734 | (provide 'apropos) |
| 735 | |
| 736 | ;;; apropos.el ends here |