Mercurial > hg > xemacs-beta
annotate lisp/help.el @ 5691:b490ddbd42aa
Back out 7371081ce8f7, I have a better approach.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 06 Nov 2012 21:34:15 +0000 |
| parents | 7371081ce8f7 |
| children | be87f507f510 |
| rev | line source |
|---|---|
| 3368 | 1 ;; help.el --- help commands for XEmacs. |
| 428 | 2 |
| 3 ;; Copyright (C) 1985, 1986, 1992-4, 1997 Free Software Foundation, Inc. | |
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4 ;; Copyright (C) 2001, 2002, 2003, 2010 Ben Wing. |
| 428 | 5 |
| 6 ;; Maintainer: FSF | |
| 7 ;; Keywords: help, internal, dumped | |
| 8 | |
| 9 ;; This file is part of XEmacs. | |
| 10 | |
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11 ;; XEmacs is free software: you can redistribute it and/or modify it |
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12 ;; under the terms of the GNU General Public License as published by the |
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13 ;; Free Software Foundation, either version 3 of the License, or (at your |
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14 ;; option) any later version. |
| 428 | 15 |
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16 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT |
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17 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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18 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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19 ;; for more details. |
| 428 | 20 |
| 21 ;; You should have received a copy of the GNU General Public License | |
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22 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>. |
| 428 | 23 |
| 24 ;;; Synched up with: FSF 19.30. | |
| 25 | |
| 26 ;;; Commentary: | |
| 27 | |
| 28 ;; This file is dumped with XEmacs. | |
| 29 | |
| 30 ;; This code implements XEmacs's on-line help system, the one invoked by | |
| 31 ;;`M-x help-for-help'. | |
| 32 | |
| 33 ;; 06/11/1997 -- Converted to use char-after instead of broken | |
| 34 ;; following-char. -slb | |
| 35 | |
| 36 ;;; Code: | |
| 37 | |
| 38 ;; Get the macro make-help-screen when this is compiled, | |
| 39 ;; or run interpreted, but not when the compiled code is loaded. | |
| 40 (eval-when-compile (require 'help-macro)) | |
| 41 | |
| 3368 | 42 (require 'loadhist) ;; For symbol-file. |
| 43 | |
| 428 | 44 (defgroup help nil |
| 45 "Support for on-line help systems." | |
| 46 :group 'emacs) | |
| 47 | |
| 48 (defgroup help-appearance nil | |
| 49 "Appearance of help buffers." | |
| 50 :group 'help) | |
| 51 | |
| 52 (defvar help-map (let ((map (make-sparse-keymap))) | |
| 53 (set-keymap-name map 'help-map) | |
| 54 (set-keymap-prompt | |
| 444 | 55 map (gettext "(Type ? for further options)")) |
| 428 | 56 map) |
| 57 "Keymap for characters following the Help key.") | |
| 58 | |
| 59 ;; global-map definitions moved to keydefs.el | |
| 60 (fset 'help-command help-map) | |
| 61 | |
| 62 (define-key help-map (vector help-char) 'help-for-help) | |
| 63 (define-key help-map "?" 'help-for-help) | |
| 64 (define-key help-map 'help 'help-for-help) | |
| 65 (define-key help-map '(f1) 'help-for-help) | |
| 66 | |
| 67 (define-key help-map "a" 'hyper-apropos) ; 'command-apropos in FSFmacs | |
| 502 | 68 (define-key help-map "A" 'command-hyper-apropos) |
| 69 ;; #### should be hyper-apropos-documentation, once that's written. | |
| 70 (define-key help-map "\C-a" 'apropos-documentation) | |
| 428 | 71 |
| 72 (define-key help-map "b" 'describe-bindings) | |
| 73 (define-key help-map "B" 'describe-beta) | |
| 74 | |
| 502 | 75 (define-key help-map "c" 'describe-key-briefly) |
| 428 | 76 (define-key help-map "C" 'customize) |
| 502 | 77 ;; FSFmacs has Info-goto-emacs-command-node on C-f, no binding |
| 78 ;; for Info-elisp-ref | |
| 79 (define-key help-map "\C-c" 'Info-goto-emacs-command-node) | |
| 428 | 80 |
| 81 (define-key help-map "d" 'describe-function) | |
| 502 | 82 (define-key help-map "\C-d" 'describe-distribution) |
| 83 | |
| 84 (define-key help-map "e" (if (fboundp 'view-last-error) 'view-last-error | |
| 85 'describe-last-error)) | |
| 86 | |
| 428 | 87 (define-key help-map "f" 'describe-function) |
| 502 | 88 ;; #### not a good interface. no way to specify that C-h is preferred |
| 89 ;; as a prefix and not BS. should instead be specified as part of | |
| 90 ;; `define-key'. | |
| 91 ;; (put 'describe-function 'preferred-key-sequence "\C-hf") | |
| 428 | 92 (define-key help-map "F" 'xemacs-local-faq) |
| 502 | 93 (define-key help-map "\C-f" 'Info-elisp-ref) |
| 428 | 94 |
| 95 (define-key help-map "i" 'info) | |
| 502 | 96 (define-key help-map "I" 'Info-search-index-in-xemacs-and-lispref) |
| 97 (define-key help-map "\C-i" 'Info-query) | |
| 98 | |
| 99 (define-key help-map "k" 'describe-key) | |
| 100 (define-key help-map "\C-k" 'Info-goto-emacs-key-command-node) | |
| 428 | 101 |
| 102 (define-key help-map "l" 'view-lossage) | |
| 502 | 103 (define-key help-map "\C-l" 'describe-copying) ; on \C-c in FSFmacs |
| 428 | 104 |
| 105 (define-key help-map "m" 'describe-mode) | |
| 106 | |
| 502 | 107 (define-key help-map "n" 'view-emacs-news) |
| 428 | 108 (define-key help-map "\C-n" 'view-emacs-news) |
| 109 | |
| 110 (define-key help-map "p" 'finder-by-keyword) | |
| 502 | 111 (define-key help-map "\C-p" 'describe-pointer) |
| 3074 | 112 (define-key help-map "P" 'view-xemacs-problems) |
| 502 | 113 |
| 114 (define-key help-map "q" 'help-quit) | |
| 428 | 115 |
| 116 ;; Do this right with an autoload cookie in finder.el. | |
| 117 ;;(autoload 'finder-by-keyword "finder" | |
| 118 ;; "Find packages matching a given keyword." t) | |
| 119 | |
| 120 (define-key help-map "s" 'describe-syntax) | |
| 502 | 121 (define-key help-map "S" 'view-sample-init-el) |
| 428 | 122 |
| 123 (define-key help-map "t" 'help-with-tutorial) | |
| 124 | |
| 125 (define-key help-map "v" 'describe-variable) | |
| 126 | |
| 502 | 127 (define-key help-map "w" 'where-is) |
| 128 (define-key help-map "\C-w" 'describe-no-warranty) | |
| 428 | 129 |
| 502 | 130 ;; #### It would be nice if the code below to add hyperlinks was |
| 131 ;; generalized. We would probably need a "hyperlink mode" from which | |
| 132 ;; help-mode is derived. This means we probably need multiple | |
| 133 ;; inheritance of modes! Thankfully this is not hard to implement; we | |
| 134 ;; already have the ability for a keymap to have multiple parents. | |
| 135 ;; However, we'd have to define any multiply-inherited-from modes using | |
| 136 ;; a standard `define-mode' construction instead of manually doing it, | |
| 137 ;; because we don't want each guy calling `kill-all-local-variables' and | |
| 138 ;; messing up the previous one. | |
| 428 | 139 |
| 140 (define-derived-mode help-mode view-major-mode "Help" | |
| 141 "Major mode for viewing help text. | |
| 142 Entry to this mode runs the normal hook `help-mode-hook'. | |
| 143 Commands: | |
| 144 \\{help-mode-map}" | |
| 145 ) | |
| 146 | |
| 147 (define-key help-mode-map "q" 'help-mode-quit) | |
| 148 (define-key help-mode-map "Q" 'help-mode-bury) | |
| 149 (define-key help-mode-map "f" 'find-function-at-point) | |
| 150 (define-key help-mode-map "d" 'describe-function-at-point) | |
| 151 (define-key help-mode-map "v" 'describe-variable-at-point) | |
| 152 (define-key help-mode-map "i" 'Info-elisp-ref) | |
| 153 (define-key help-mode-map "c" 'customize-variable) | |
| 154 (define-key help-mode-map [tab] 'help-next-symbol) | |
| 155 (define-key help-mode-map [(shift tab)] 'help-prev-symbol) | |
| 3368 | 156 (define-key help-mode-map [return] 'help-find-source-or-scroll-up) |
| 157 (define-key help-mode-map [button2] 'help-mouse-find-source-or-track) | |
| 428 | 158 (define-key help-mode-map "n" 'help-next-section) |
| 159 (define-key help-mode-map "p" 'help-prev-section) | |
| 160 | |
| 1123 | 161 (define-derived-mode temp-buffer-mode view-major-mode "Temp" |
| 162 "Major mode for viewing temporary buffers. | |
| 163 Exit using \\<temp-buffer-mode-map>\\[help-mode-quit]. | |
| 164 | |
| 165 Entry to this mode runs the normal hook `temp-buffer-mode-hook'. | |
| 166 Commands: | |
| 167 \\{temp-buffer-mode-map}" | |
| 168 ) | |
| 169 | |
| 170 (define-key temp-buffer-mode-map "q" 'help-mode-quit) | |
| 171 (define-key temp-buffer-mode-map "Q" 'help-mode-bury) | |
| 172 | |
| 428 | 173 (defun describe-function-at-point () |
| 174 "Describe directly the function at point in the other window." | |
| 175 (interactive) | |
| 176 (let ((symb (function-at-point))) | |
| 177 (when symb | |
| 178 (describe-function symb)))) | |
| 179 | |
| 180 (defun describe-variable-at-point () | |
| 181 "Describe directly the variable at point in the other window." | |
| 182 (interactive) | |
| 183 (let ((symb (variable-at-point))) | |
| 184 (when symb | |
| 185 (describe-variable symb)))) | |
| 186 | |
| 187 (defun help-next-symbol () | |
| 188 "Move point to the next quoted symbol." | |
| 189 (interactive) | |
| 190 (search-forward "`" nil t)) | |
| 191 | |
| 192 (defun help-prev-symbol () | |
| 193 "Move point to the previous quoted symbol." | |
| 194 (interactive) | |
| 195 (search-backward "'" nil t)) | |
| 196 | |
| 197 (defun help-next-section () | |
| 198 "Move point to the next quoted symbol." | |
| 199 (interactive) | |
| 200 (search-forward-regexp "^\\w+:" nil t)) | |
| 201 | |
| 202 (defun help-prev-section () | |
| 203 "Move point to the previous quoted symbol." | |
| 204 (interactive) | |
| 205 (search-backward-regexp "^\\w+:" nil t)) | |
| 206 | |
| 207 (defun help-mode-bury () | |
| 208 "Bury the help buffer, possibly restoring the previous window configuration." | |
| 209 (interactive) | |
| 210 (help-mode-quit t)) | |
| 211 | |
| 212 (defun help-mode-quit (&optional bury) | |
| 213 "Exit from help mode, possibly restoring the previous window configuration. | |
| 214 If the optional argument BURY is non-nil, the help buffer is buried, | |
| 215 otherwise it is killed." | |
| 216 (interactive) | |
| 217 (let ((buf (current-buffer))) | |
| 442 | 218 (cond (help-window-config |
| 219 (set-window-configuration help-window-config)) | |
| 428 | 220 ((not (one-window-p)) |
| 221 (delete-window))) | |
| 222 (if bury | |
| 223 (bury-buffer buf) | |
| 224 (kill-buffer buf)))) | |
| 225 | |
| 226 (defun help-quit () | |
| 227 (interactive) | |
| 228 nil) | |
| 229 | |
| 771 | 230 (define-obsolete-function-alias 'deprecated-help-command 'help-for-help) |
| 428 | 231 |
| 232 ;;(define-key global-map 'backspace 'deprecated-help-command) | |
| 233 | |
| 771 | 234 (defconst tutorial-supported-languages |
| 235 '( | |
| 236 ("Croatian" hr iso-8859-2) | |
| 237 ("Czech" cs iso-8859-2) | |
| 238 ("Dutch" nl iso-8859-1) | |
| 239 ("English" nil raw-text) | |
| 240 ("French" fr iso-8859-1) | |
| 241 ("German" de iso-8859-1) | |
| 242 ("Norwegian" no iso-8859-1) | |
| 243 ("Polish" pl iso-8859-2) | |
| 244 ("Romanian" ro iso-8859-2) | |
| 245 ("Slovak" sk iso-8859-2) | |
| 246 ("Slovenian" sl iso-8859-2) | |
| 247 ("Spanish" es iso-8859-1) | |
| 248 ("Swedish" se iso-8859-1) | |
| 249 ) | |
| 250 "Alist of supported languages in TUTORIAL files. | |
| 251 Add languages here, as more are translated.") | |
| 252 | |
| 253 ;; TUTORIAL arg is XEmacs addition | |
| 254 (defun help-with-tutorial (&optional tutorial language) | |
| 255 "Select the XEmacs learn-by-doing tutorial. | |
| 256 Optional arg TUTORIAL specifies the tutorial file; if not specified or | |
| 257 if this command is invoked interactively, the tutorial appropriate to | |
| 258 the current language environment is used. If there is no tutorial | |
| 259 written in that language, or if this version of XEmacs has no | |
| 260 international (Mule) support, the English-language tutorial is used. | |
| 261 With a prefix argument, you are asked to select which language." | |
| 262 (interactive "i\nP") | |
| 263 (when (and language (consp language)) | |
| 264 (setq language | |
| 265 (if (featurep 'mule) | |
| 266 (or (declare-fboundp (read-language-name 'tutorial "Language: ")) | |
| 267 (error "No tutorial file of the specified language")) | |
| 268 (let ((completion-ignore-case t)) | |
| 269 (completing-read "Language: " | |
| 270 tutorial-supported-languages nil t))))) | |
| 271 (or language | |
| 272 (setq language | |
| 273 (if (featurep 'mule) (declare-boundp current-language-environment) | |
| 274 "English"))) | |
| 275 (or tutorial | |
| 276 (setq tutorial | |
| 277 (cond ((featurep 'mule) | |
| 278 (or (declare-fboundp (get-language-info language 'tutorial)) | |
| 279 "TUTORIAL")) | |
| 280 ((equal language "English") "TUTORIAL") | |
| 281 (t (format "TUTORIAL.%s" | |
| 282 (cadr (assoc language | |
| 283 tutorial-supported-languages))))))) | |
| 284 (let ((file (expand-file-name tutorial "~"))) | |
| 285 (delete-other-windows) | |
| 286 (let ((buffer (or (get-file-buffer file) | |
| 287 (create-file-buffer file))) | |
| 288 (window-configuration (current-window-configuration))) | |
| 289 (condition-case error-data | |
| 290 (progn | |
| 291 (switch-to-buffer buffer) | |
| 292 (setq buffer-file-name file) | |
| 293 (setq default-directory (expand-file-name "~/")) | |
| 294 (setq buffer-auto-save-file-name nil) | |
| 295 ;; Because of non-Mule users, TUTORIALs are not coded | |
| 296 ;; independently, so we must guess the coding according to | |
| 297 ;; the language. | |
| 298 (let ((coding-system-for-read | |
| 299 (if (featurep 'mule) | |
| 300 (with-fboundp 'get-language-info | |
| 301 (or (get-language-info language | |
| 302 'tutorial-coding-system) | |
| 303 (car (get-language-info language | |
| 304 'coding-system)))) | |
| 305 (nth 2 (assoc language tutorial-supported-languages))))) | |
| 306 (insert-file-contents (locate-data-file tutorial))) | |
| 307 (goto-char (point-min)) | |
| 308 ;; [The 'didactic' blank lines: possibly insert blank lines | |
| 309 ;; around <<nya nya nya>> and replace << >> with [ ].] No more | |
| 310 ;; didactic blank lines. It was just a bad idea, anyway. I | |
| 311 ;; rewrote the TUTORIAL so it doesn't need them. However, some | |
| 312 ;; tutorials in other languages haven't yet been updated. #### | |
| 313 ;; Delete this code when they're all updated. | |
| 314 (if (re-search-forward "^<<.+>>" nil t) | |
| 315 (let ((n (- (window-height (selected-window)) | |
| 316 (count-lines (point-min) (point-at-bol)) | |
| 317 6))) | |
| 318 (if (< n 12) | |
| 319 (progn (beginning-of-line) (kill-line)) | |
| 320 ;; Some people get confused by the large gap | |
| 321 (delete-backward-char 2) | |
| 322 (insert "]") | |
| 323 (beginning-of-line) | |
| 324 (save-excursion | |
| 325 (delete-char 2) | |
| 326 (insert "[")) | |
| 327 (newline (/ n 2)) | |
| 328 (next-line 1) | |
| 329 (newline (- n (/ n 2)))))) | |
| 330 (goto-char (point-min)) | |
| 331 (set-buffer-modified-p nil)) | |
| 332 ;; TUTORIAL was not found: kill the buffer and restore the | |
| 333 ;; window configuration. | |
| 334 (file-error (kill-buffer buffer) | |
| 335 (set-window-configuration window-configuration) | |
| 336 ;; Now, signal the error | |
| 337 (signal (car error-data) (cdr error-data))))))) | |
| 428 | 338 |
| 339 ;; used by describe-key, describe-key-briefly, insert-key-binding, etc. | |
| 340 (defun key-or-menu-binding (key &optional menu-flag) | |
| 341 "Return the command invoked by KEY. | |
| 342 Like `key-binding', but handles menu events and toolbar presses correctly. | |
| 343 KEY is any value returned by `next-command-event'. | |
| 344 MENU-FLAG is a symbol that should be set to t if KEY is a menu event, | |
| 444 | 345 or nil otherwise." |
| 428 | 346 (let (defn) |
| 347 (and menu-flag (set menu-flag nil)) | |
| 348 ;; If the key typed was really a menu selection, grab the form out | |
| 349 ;; of the event object and intuit the function that would be called, | |
| 350 ;; and describe that instead. | |
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351 (if (and (vectorp key) (eql 1 (length key)) |
| 428 | 352 (or (misc-user-event-p (aref key 0)) |
| 353 (eq (car-safe (aref key 0)) 'menu-selection))) | |
| 354 (let ((event (aref key 0))) | |
| 355 (setq defn (if (eventp event) | |
| 356 (list (event-function event) (event-object event)) | |
| 357 (cdr event))) | |
| 358 (and menu-flag (set menu-flag t)) | |
| 359 (when (eq (car defn) 'eval) | |
| 360 (setq defn (car (cdr defn)))) | |
| 361 (when (eq (car-safe defn) 'call-interactively) | |
| 362 (setq defn (car (cdr defn)))) | |
| 363 (when (and (consp defn) (null (cdr defn))) | |
| 364 (setq defn (car defn)))) | |
| 365 ;; else | |
| 366 (setq defn (key-binding key))) | |
| 367 ;; kludge: if a toolbar button was pressed on, try to find the | |
| 368 ;; binding of the toolbar button. | |
| 369 (if (and (eq defn 'press-toolbar-button) | |
| 370 (vectorp key) | |
| 371 (button-press-event-p (aref key (1- (length key))))) | |
| 372 ;; wait for the button release. We're on shaky ground here ... | |
| 373 (let ((event (next-command-event)) | |
| 374 button) | |
| 375 (if (and (button-release-event-p event) | |
| 376 (event-over-toolbar-p event) | |
| 377 (eq 'release-and-activate-toolbar-button | |
| 378 (key-binding (vector event))) | |
| 379 (setq button (event-toolbar-button event))) | |
| 380 (toolbar-button-callback button) | |
| 381 ;; if anything went wrong, try returning the binding of | |
| 382 ;; the button-up event, of the original binding | |
| 383 (or (key-or-menu-binding (vector event)) | |
| 384 defn))) | |
| 385 ;; no toolbar kludge | |
| 386 defn) | |
| 387 )) | |
| 388 | |
| 389 (defun describe-key-briefly (key &optional insert) | |
| 390 "Print the name of the function KEY invokes. KEY is a string. | |
| 391 If INSERT (the prefix arg) is non-nil, insert the message in the buffer." | |
| 392 (interactive "kDescribe key briefly: \nP") | |
| 393 (let ((standard-output (if insert (current-buffer) t)) | |
| 394 defn menup) | |
| 395 (setq defn (key-or-menu-binding key 'menup)) | |
| 396 (if (or (null defn) (integerp defn)) | |
| 397 (princ (format "%s is undefined" (key-description key))) | |
| 398 ;; If it's a keyboard macro which trivially invokes another command, | |
| 399 ;; document that instead. | |
| 400 (if (or (stringp defn) (vectorp defn)) | |
| 401 (setq defn (or (key-binding defn) | |
| 402 defn))) | |
| 403 (let ((last-event (and (vectorp key) | |
| 404 (aref key (1- (length key)))))) | |
| 405 (princ (format (cond (insert | |
| 406 "%s (%s)") | |
| 407 ((or (button-press-event-p last-event) | |
| 408 (button-release-event-p last-event)) | |
| 409 (gettext "%s at that spot runs the command %s")) | |
| 410 (t | |
| 411 (gettext "%s runs the command %s"))) | |
| 412 ;; This used to say 'This menu item' but it | |
| 413 ;; could also be a scrollbar event. We can't | |
| 414 ;; distinguish at the moment. | |
| 415 (if menup | |
| 416 (if insert "item" "This item") | |
| 417 (key-description key)) | |
| 418 (if (symbolp defn) defn (prin1-to-string defn)))))))) | |
| 419 | |
| 420 ;; #### this is a horrible piece of shit function that should | |
| 421 ;; not exist. In FSF 19.30 this function has gotten three times | |
| 422 ;; as long and has tons and tons of dumb shit checking | |
| 423 ;; special-display-buffer-names and such crap. I absolutely | |
| 424 ;; refuse to insert that Ebolification here. I wanted to delete | |
| 425 ;; this function entirely but Mly bitched. | |
| 426 ;; | |
| 427 ;; If your user-land code calls this function, rewrite it to | |
| 428 ;; call with-displaying-help-buffer. | |
| 429 | |
| 430 (defun print-help-return-message (&optional function) | |
| 431 "Display or return message saying how to restore windows after help command. | |
| 432 Computes a message and applies the optional argument FUNCTION to it. | |
| 433 If FUNCTION is nil, applies `message' to it, thus printing it." | |
| 434 (and (not (get-buffer-window standard-output)) | |
| 435 (funcall | |
| 436 (or function 'message) | |
| 437 (concat | |
| 438 (substitute-command-keys | |
| 439 (if (one-window-p t) | |
| 440 (if pop-up-windows | |
| 441 (gettext "Type \\[delete-other-windows] to remove help window.") | |
| 442 (gettext "Type \\[switch-to-buffer] RET to remove help window.")) | |
| 443 (gettext "Type \\[switch-to-buffer-other-window] RET to restore the other window."))) | |
| 444 (substitute-command-keys | |
| 445 (gettext " \\[scroll-other-window] to scroll the help.")))))) | |
| 446 | |
| 447 (defcustom help-selects-help-window t | |
| 448 "*If nil, use the \"old Emacs\" behavior for Help buffers. | |
| 449 This just displays the buffer in another window, rather than selecting | |
| 450 the window." | |
| 451 :type 'boolean | |
| 452 :group 'help-appearance) | |
| 453 | |
| 454 (defcustom help-max-help-buffers 10 | |
| 455 "*Maximum help buffers to allow before they start getting killed. | |
| 456 If this is a positive integer, before a help buffer is displayed | |
| 457 by `with-displaying-help-buffer', any excess help buffers which | |
| 458 are not being displayed are first killed. Otherwise, if it is | |
| 459 zero or nil, only one help buffer, \"*Help*\" is ever used." | |
| 460 :type '(choice integer (const :tag "None" nil)) | |
| 461 :group 'help-appearance) | |
| 462 | |
| 463 (defvar help-buffer-list nil | |
| 464 "List of help buffers used by `help-register-and-maybe-prune-excess'") | |
| 465 | |
| 466 (defun help-register-and-maybe-prune-excess (newbuf) | |
| 2030 | 467 "Register help buffer named NEWBUF and possibly kill excess ones." |
| 468 ;; don't let client code pass us bogus NEWBUF---if it gets in the list, | |
| 469 ;; help can become unusable | |
| 470 (unless (stringp newbuf) | |
| 471 (error 'wrong-type-argument "help buffer name must be string" newbuf)) | |
| 428 | 472 ;; remove new buffer from list |
| 473 (setq help-buffer-list (remove newbuf help-buffer-list)) | |
| 474 ;; maybe kill excess help buffers | |
| 475 (if (and (integerp help-max-help-buffers) | |
| 476 (> (length help-buffer-list) help-max-help-buffers)) | |
| 477 (let ((keep-list nil) | |
| 478 (num-kill (- (length help-buffer-list) | |
| 479 help-max-help-buffers))) | |
| 480 (while help-buffer-list | |
| 481 (let ((buf (car help-buffer-list))) | |
| 482 (if (and (or (equal buf newbuf) (get-buffer buf)) | |
| 483 (string-match "^*Help" buf) | |
| 484 (save-excursion (set-buffer buf) | |
| 485 (eq major-mode 'help-mode))) | |
| 486 (if (and (>= num-kill (length help-buffer-list)) | |
| 487 (not (get-buffer-window buf t t))) | |
| 488 (kill-buffer buf) | |
| 489 (setq keep-list (cons buf keep-list))))) | |
| 490 (setq help-buffer-list (cdr help-buffer-list))) | |
| 491 (setq help-buffer-list (nreverse keep-list)))) | |
| 492 ;; push new buffer | |
| 493 (setq help-buffer-list (cons newbuf help-buffer-list))) | |
| 494 | |
| 495 (defvar help-buffer-prefix-string "Help" | |
| 496 "Initial string to use in constructing help buffer names. | |
| 2030 | 497 You should never set this directly, only let-bind it.") |
| 428 | 498 |
| 499 (defun help-buffer-name (name) | |
| 500 "Return a name for a Help buffer using string NAME for context." | |
| 501 (if (and (integerp help-max-help-buffers) | |
| 502 (> help-max-help-buffers 0) | |
| 503 (stringp name)) | |
| 504 (if help-buffer-prefix-string | |
| 505 (format "*%s: %s*" help-buffer-prefix-string name) | |
| 506 (format "*%s*" name)) | |
| 507 (format "*%s*" help-buffer-prefix-string))) | |
| 508 | |
| 863 | 509 ;; with-displaying-help-buffer |
| 428 | 510 |
| 511 ;; #### Should really be a macro to eliminate the requirement of | |
| 512 ;; caller to code a lambda form in THUNK -- mrb | |
| 513 | |
| 514 ;; #### BEFORE you rush to make this a macro, think about backward | |
| 515 ;; compatibility. The right way would be to create a macro with | |
| 516 ;; another name (which is a shame, because w-d-h-b is a perfect name | |
| 517 ;; for a macro) that uses with-displaying-help-buffer internally. | |
| 518 | |
| 442 | 519 (defcustom mode-for-help 'help-mode |
| 520 "*Mode that help buffers are put into.") | |
| 521 | |
| 1123 | 522 (defcustom mode-for-temp-buffer 'temp-buffer-mode |
| 523 "*Mode that help buffers are put into.") | |
| 524 | |
| 442 | 525 (defvar help-sticky-window nil |
| 526 ;; Window into which help buffers will be displayed, rather than | |
| 527 ;; always searching for a new one. This is INTERNAL and liable to | |
| 528 ;; change its interface and/or name at any moment. It should be | |
| 529 ;; bound, not set. | |
| 530 ) | |
| 531 | |
| 532 (defvar help-window-config nil) | |
| 533 | |
| 534 (make-variable-buffer-local 'help-window-config) | |
| 535 (put 'help-window-config 'permanent-local t) | |
| 536 | |
| 1123 | 537 (defmacro with-displaying-temp-buffer (name &rest body) |
| 2030 | 538 "Make a help buffer with given NAME and evaluate BODY, sending stdout there. |
| 1123 | 539 |
| 540 Use this function for displaying information in temporary buffers, where the | |
| 541 user will typically view the information and then exit using | |
| 542 \\<temp-buffer-mode-map>\\[help-mode-quit]. | |
| 863 | 543 |
| 2030 | 544 On exit from this form, the buffer is put into the mode specified in |
| 545 `mode-for-temp-buffer' and displayed, typically in a popup window. Ie, | |
| 546 the buffer is a scratchpad which is displayed all at once in formatted | |
| 547 form. | |
| 548 | |
| 549 N.B. Write to this buffer with functions like `princ', not `insert'." | |
| 1123 | 550 `(let* ((winconfig (current-window-configuration)) |
| 551 (was-one-window (one-window-p)) | |
| 552 (buffer-name ,name) | |
| 553 (help-not-visible | |
| 554 (not (and (windows-of-buffer buffer-name) ;shortcut | |
| 555 (memq (selected-frame) | |
| 556 (mapcar 'window-frame | |
| 557 (windows-of-buffer buffer-name))))))) | |
| 428 | 558 (help-register-and-maybe-prune-excess buffer-name) |
| 442 | 559 ;; if help-sticky-window is bogus or deleted, get rid of it. |
| 560 (if (and help-sticky-window (or (not (windowp help-sticky-window)) | |
| 561 (not (window-live-p help-sticky-window)))) | |
| 562 (setq help-sticky-window nil)) | |
| 563 (prog1 | |
| 564 (let ((temp-buffer-show-function | |
| 565 (if help-sticky-window | |
| 566 #'(lambda (buffer) | |
| 567 (set-window-buffer help-sticky-window buffer)) | |
| 568 temp-buffer-show-function))) | |
| 569 (with-output-to-temp-buffer buffer-name | |
| 1123 | 570 (prog1 (progn ,@body) |
| 442 | 571 (save-excursion |
| 572 (set-buffer standard-output) | |
| 1123 | 573 (funcall mode-for-temp-buffer))))) |
| 428 | 574 (let ((helpwin (get-buffer-window buffer-name))) |
| 575 (when helpwin | |
| 1123 | 576 ;; If the temp buffer is already displayed on this |
| 442 | 577 ;; frame, don't override the previous configuration |
| 578 (when help-not-visible | |
| 579 (with-current-buffer (window-buffer helpwin) | |
| 580 (setq help-window-config winconfig))) | |
| 428 | 581 (when help-selects-help-window |
| 582 (select-window helpwin)) | |
| 583 (cond ((eq helpwin (selected-window)) | |
| 584 (display-message 'command | |
| 1123 | 585 (substitute-command-keys "Type \\[help-mode-quit] to remove window, \\[scroll-up] to scroll the text."))) |
| 428 | 586 (was-one-window |
| 587 (display-message 'command | |
| 1123 | 588 (substitute-command-keys "Type \\[delete-other-windows] to remove window, \\[scroll-other-window] to scroll the text."))) |
| 428 | 589 (t |
| 590 (display-message 'command | |
| 1123 | 591 (substitute-command-keys "Type \\[switch-to-buffer-other-window] to restore the other window, \\[scroll-other-window] to scroll the text."))))))))) |
| 592 | |
| 593 (put 'with-displaying-temp-buffer 'lisp-indent-function 1) | |
| 594 | |
| 595 (defun with-displaying-help-buffer (thunk &optional name) | |
| 596 "Form which makes a help buffer with given NAME and evaluates BODY there. | |
| 597 The actual name of the buffer is generated by the function `help-buffer-name'. | |
| 598 | |
| 599 Use this function for displaying help when C-h something is pressed or | |
| 600 in similar situations. Do *not* use it when you are displaying a help | |
| 601 message and then prompting for input in the minibuffer -- this macro | |
| 602 usually selects the help buffer, which is not what you want in those | |
| 603 situations." | |
| 604 (let ((mode-for-temp-buffer mode-for-help)) | |
| 605 (with-displaying-temp-buffer (help-buffer-name name) | |
| 606 (funcall thunk)))) | |
| 428 | 607 |
| 608 (defun describe-key (key) | |
| 609 "Display documentation of the function invoked by KEY. | |
| 610 KEY is a string, or vector of events. | |
| 611 When called interactively, KEY may also be a menu selection." | |
| 612 (interactive "kDescribe key: ") | |
| 613 (let ((defn (key-or-menu-binding key)) | |
| 614 (key-string (key-description key))) | |
| 615 (if (or (null defn) (integerp defn)) | |
| 616 (message "%s is undefined" key-string) | |
| 617 (with-displaying-help-buffer | |
| 618 (lambda () | |
| 619 (princ key-string) | |
| 620 (princ " runs ") | |
| 621 (if (symbolp defn) | |
| 622 (princ (format "`%s'" defn)) | |
| 623 (princ defn)) | |
| 624 (princ "\n\n") | |
| 625 (cond ((or (stringp defn) (vectorp defn)) | |
| 626 (let ((cmd (key-binding defn))) | |
| 627 (if (not cmd) | |
| 628 (princ "a keyboard macro") | |
| 629 (progn | |
| 630 (princ "a keyboard macro which runs the command ") | |
| 631 (princ cmd) | |
| 632 (princ ":\n\n") | |
| 633 (if (documentation cmd) (princ (documentation cmd))))))) | |
| 634 ((and (consp defn) (not (eq 'lambda (car-safe defn)))) | |
| 635 (let ((describe-function-show-arglist nil)) | |
| 636 (describe-function-1 (car defn)))) | |
| 637 ((symbolp defn) | |
| 638 (describe-function-1 defn)) | |
| 639 ((documentation defn) | |
| 640 (princ (documentation defn))) | |
| 641 (t | |
| 642 (princ "not documented")))) | |
| 643 (format "key `%s'" key-string))))) | |
| 644 | |
| 645 (defun describe-mode () | |
| 646 "Display documentation of current major mode and minor modes. | |
| 647 For this to work correctly for a minor mode, the mode's indicator variable | |
| 648 \(listed in `minor-mode-alist') must also be a function whose documentation | |
| 649 describes the minor mode." | |
| 650 (interactive) | |
| 651 (with-displaying-help-buffer | |
| 652 (lambda () | |
| 653 ;; XEmacs change: print the major-mode documentation before | |
| 654 ;; the minor modes. | |
| 655 (princ mode-name) | |
| 656 (princ " mode:\n") | |
| 657 (princ (documentation major-mode)) | |
| 658 (princ "\n\n----\n\n") | |
| 659 (let ((minor-modes minor-mode-alist)) | |
| 660 (while minor-modes | |
| 661 (let* ((minor-mode (car (car minor-modes))) | |
| 662 (indicator (car (cdr (car minor-modes))))) | |
| 663 ;; Document a minor mode if it is listed in minor-mode-alist, | |
| 664 ;; bound locally in this buffer, non-nil, and has a function | |
| 665 ;; definition. | |
| 666 (if (and (boundp minor-mode) | |
| 667 (symbol-value minor-mode) | |
| 668 (fboundp minor-mode)) | |
| 669 (let ((pretty-minor-mode minor-mode)) | |
| 670 (if (string-match "-mode\\'" (symbol-name minor-mode)) | |
| 671 (setq pretty-minor-mode | |
| 672 (capitalize | |
| 673 (substring (symbol-name minor-mode) | |
| 674 0 (match-beginning 0))))) | |
| 675 (while (and (consp indicator) (extentp (car indicator))) | |
| 676 (setq indicator (cdr indicator))) | |
| 677 (while (and indicator (symbolp indicator)) | |
| 678 (setq indicator (symbol-value indicator))) | |
| 732 | 679 (princ (format "%s minor mode (%s):\n" |
| 680 pretty-minor-mode | |
| 681 (if indicator | |
| 682 (format "indicator%s" indicator) | |
| 683 "no indicator"))) | |
| 428 | 684 (princ (documentation minor-mode)) |
| 685 (princ "\n\n----\n\n")))) | |
| 686 (setq minor-modes (cdr minor-modes))))) | |
| 687 (format "%s mode" mode-name))) | |
| 688 | |
| 689 ;; So keyboard macro definitions are documented correctly | |
| 690 (fset 'defining-kbd-macro (symbol-function 'start-kbd-macro)) | |
| 691 | |
| 462 | 692 ;; view a read-only file intelligently |
| 693 (defun Help-find-file (file) | |
| 694 (if (fboundp 'view-file) | |
| 695 (view-file file) | |
| 696 (find-file-read-only file) | |
| 697 (goto-char (point-min)))) | |
| 698 | |
| 428 | 699 (defun describe-distribution () |
| 700 "Display info on how to obtain the latest version of XEmacs." | |
| 701 (interactive) | |
| 2537 | 702 (save-window-excursion |
| 703 (info) | |
| 704 (Info-find-node "xemacs-faq" "Q1.1.1")) | |
| 705 (switch-to-buffer "*info*")) | |
| 428 | 706 |
| 707 (defun describe-beta () | |
| 708 "Display info on how to deal with Beta versions of XEmacs." | |
| 709 (interactive) | |
| 2537 | 710 (save-window-excursion |
| 711 (info "(beta)Top")) | |
| 712 (switch-to-buffer "*info*")) | |
| 428 | 713 |
| 714 (defun describe-copying () | |
| 715 "Display info on how you may redistribute copies of XEmacs." | |
| 716 (interactive) | |
| 462 | 717 (Help-find-file (locate-data-file "COPYING"))) |
| 428 | 718 |
| 719 (defun describe-pointer () | |
| 720 "Show a list of all defined mouse buttons, and their definitions." | |
| 721 (interactive) | |
| 722 (describe-bindings nil t)) | |
| 723 | |
| 724 (defun describe-no-warranty () | |
| 725 "Display info on all the kinds of warranty XEmacs does NOT have." | |
| 726 (interactive) | |
| 727 (describe-copying) | |
| 728 (let (case-fold-search) | |
| 729 (search-forward "NO WARRANTY") | |
| 730 (recenter 0))) | |
| 731 | |
| 732 (defun describe-bindings (&optional prefix mouse-only-p) | |
| 733 "Show a list of all defined keys, and their definitions. | |
| 734 The list is put in a buffer, which is displayed. | |
| 444 | 735 If optional first argument PREFIX is supplied, only commands |
| 736 which start with that sequence of keys are described. | |
| 737 If optional second argument MOUSE-ONLY-P (prefix arg, interactively) | |
| 738 is non-nil then only the mouse bindings are displayed." | |
| 428 | 739 (interactive (list nil current-prefix-arg)) |
| 740 (with-displaying-help-buffer | |
| 741 (lambda () | |
| 742 (describe-bindings-1 prefix mouse-only-p)) | |
| 743 (format "bindings for %s" major-mode))) | |
| 744 | |
| 745 (defun describe-bindings-1 (&optional prefix mouse-only-p) | |
| 746 (let ((heading (if mouse-only-p | |
| 747 (gettext "button binding\n------ -------\n") | |
| 748 (gettext "key binding\n--- -------\n"))) | |
| 749 (buffer (current-buffer)) | |
| 750 (minor minor-mode-map-alist) | |
| 430 | 751 (extent-maps (mapcar-extents |
| 752 'extent-keymap | |
| 753 nil (current-buffer) (point) (point) nil 'keymap)) | |
| 428 | 754 (local (current-local-map)) |
| 755 (shadow '())) | |
| 756 (set-buffer standard-output) | |
| 430 | 757 (while extent-maps |
| 758 (insert "Bindings for Text Region:\n" | |
| 759 heading) | |
| 760 (describe-bindings-internal | |
| 761 (car extent-maps) nil shadow prefix mouse-only-p) | |
| 762 (insert "\n") | |
| 763 (setq shadow (cons (car extent-maps) shadow) | |
| 764 extent-maps (cdr extent-maps))) | |
| 428 | 765 (while minor |
| 766 (let ((sym (car (car minor))) | |
| 767 (map (cdr (car minor)))) | |
| 768 (if (symbol-value-in-buffer sym buffer nil) | |
| 769 (progn | |
| 770 (insert (format "Minor Mode Bindings for `%s':\n" | |
| 771 sym) | |
| 772 heading) | |
| 773 (describe-bindings-internal map nil shadow prefix mouse-only-p) | |
| 774 (insert "\n") | |
| 775 (setq shadow (cons map shadow)))) | |
| 776 (setq minor (cdr minor)))) | |
| 777 (if local | |
| 778 (progn | |
| 779 (insert "Local Bindings:\n" heading) | |
| 780 (describe-bindings-internal local nil shadow prefix mouse-only-p) | |
| 781 (insert "\n") | |
| 782 (setq shadow (cons local shadow)))) | |
| 771 | 783 (if (console-on-window-system-p) |
| 784 (progn | |
| 785 (insert "Global Window-System-Only Bindings:\n" heading) | |
| 786 (describe-bindings-internal global-window-system-map nil | |
| 787 shadow prefix mouse-only-p) | |
| 788 (push global-window-system-map shadow)) | |
| 789 (insert "Global TTY-Only Bindings:\n" heading) | |
| 790 (describe-bindings-internal global-tty-map nil | |
| 791 shadow prefix mouse-only-p) | |
| 792 (push global-tty-map shadow)) | |
| 793 (insert "\nGlobal Bindings:\n" heading) | |
| 428 | 794 (describe-bindings-internal (current-global-map) |
| 795 nil shadow prefix mouse-only-p) | |
| 796 (when (and prefix function-key-map (not mouse-only-p)) | |
| 797 (insert "\nFunction key map translations:\n" heading) | |
| 798 (describe-bindings-internal function-key-map nil nil | |
| 799 prefix mouse-only-p)) | |
| 800 (set-buffer buffer) | |
| 801 standard-output)) | |
| 802 | |
| 803 (defun describe-prefix-bindings () | |
| 804 "Describe the bindings of the prefix used to reach this command. | |
| 805 The prefix described consists of all but the last event | |
| 806 of the key sequence that ran this command." | |
| 807 (interactive) | |
| 808 (let* ((key (this-command-keys)) | |
| 809 (prefix (make-vector (1- (length key)) nil)) | |
| 810 i) | |
| 811 (setq i 0) | |
| 812 (while (< i (length prefix)) | |
| 813 (aset prefix i (aref key i)) | |
| 814 (setq i (1+ i))) | |
| 815 (with-displaying-help-buffer | |
| 816 (lambda () | |
| 817 (princ "Key bindings starting with ") | |
| 818 (princ (key-description prefix)) | |
| 819 (princ ":\n\n") | |
| 820 (describe-bindings-1 prefix nil)) | |
| 821 (format "%s prefix" (key-description prefix))))) | |
| 822 | |
| 823 ;; Make C-h after a prefix, when not specifically bound, | |
| 824 ;; run describe-prefix-bindings. | |
| 825 (setq prefix-help-command 'describe-prefix-bindings) | |
| 826 | |
| 827 (defun describe-installation () | |
| 828 "Display a buffer showing information about this XEmacs was compiled." | |
| 829 (interactive) | |
| 4246 | 830 (if (and-boundp 'Installation-string |
| 831 (stringp Installation-string)) | |
| 428 | 832 (with-displaying-help-buffer |
| 833 (lambda () | |
| 4246 | 834 (princ Installation-string)) |
| 428 | 835 "Installation") |
| 4246 | 836 (error 'unimplemented "No Installation information available."))) |
| 428 | 837 |
| 838 (defun view-emacs-news () | |
| 839 "Display info on recent changes to XEmacs." | |
| 840 (interactive) | |
| 2986 | 841 (Help-find-file (expand-file-name "NEWS" data-directory))) |
| 428 | 842 |
| 3074 | 843 (defun view-xemacs-problems () |
| 844 "Display known problems with XEmacs." | |
| 845 (interactive) | |
| 846 (Help-find-file (expand-file-name "PROBLEMS" data-directory))) | |
| 847 | |
| 428 | 848 (defun xemacs-www-page () |
| 849 "Go to the XEmacs World Wide Web page." | |
| 850 (interactive) | |
| 776 | 851 (if-fboundp 'browse-url |
| 442 | 852 (browse-url "http://www.xemacs.org/") |
| 428 | 853 (error "xemacs-www-page requires browse-url"))) |
| 854 | |
| 855 (defun xemacs-www-faq () | |
| 856 "View the latest and greatest XEmacs FAQ using the World Wide Web." | |
| 857 (interactive) | |
| 776 | 858 (if-fboundp 'browse-url |
| 442 | 859 (browse-url "http://www.xemacs.org/faq/index.html") |
| 428 | 860 (error "xemacs-www-faq requires browse-url"))) |
| 861 | |
| 862 (defun xemacs-local-faq () | |
| 863 "View the local copy of the XEmacs FAQ. | |
| 864 If you have access to the World Wide Web, you should use `xemacs-www-faq' | |
| 865 instead, to ensure that you get the most up-to-date information." | |
| 866 (interactive) | |
| 867 (save-window-excursion | |
| 868 (info) | |
| 869 (Info-find-node "xemacs-faq" "Top")) | |
| 870 (switch-to-buffer "*info*")) | |
| 871 | |
| 462 | 872 (defun view-sample-init-el () |
| 873 "Display the sample init.el file." | |
| 874 (interactive) | |
| 875 (Help-find-file (locate-data-file "sample.init.el"))) | |
| 876 | |
| 428 | 877 (defcustom view-lossage-key-count 100 |
| 878 "*Number of keys `view-lossage' shows. | |
| 879 The maximum number of available keys is governed by `recent-keys-ring-size'." | |
| 880 :type 'integer | |
| 881 :group 'help) | |
| 882 | |
| 883 (defcustom view-lossage-message-count 100 | |
| 884 "*Number of minibuffer messages `view-lossage' shows." | |
| 885 :type 'integer | |
| 886 :group 'help) | |
| 887 | |
| 888 (defun print-recent-messages (n) | |
| 889 "Print N most recent messages to standard-output, most recent first. | |
| 890 If N is nil, all messages will be printed." | |
| 793 | 891 (clear-message) ;; make sure current message goes into log |
| 428 | 892 (save-excursion |
| 893 (let ((buffer (get-buffer-create " *Message-Log*")) | |
| 894 oldpoint extent) | |
| 895 (goto-char (point-max buffer) buffer) | |
| 896 (set-buffer standard-output) | |
| 897 (while (and (not (bobp buffer)) | |
| 898 (or (null n) (>= (decf n) 0))) | |
| 899 (setq oldpoint (point buffer)) | |
| 900 (setq extent (extent-at oldpoint buffer | |
| 901 'message-multiline nil 'before)) | |
| 902 ;; If the message was multiline, move all the way to the | |
| 903 ;; beginning. | |
| 904 (if extent | |
| 905 (goto-char (extent-start-position extent) buffer) | |
| 906 (forward-line -1 buffer)) | |
| 907 (insert-buffer-substring buffer (point buffer) oldpoint))))) | |
| 908 | |
| 793 | 909 (defun view-warnings () |
| 910 "Display warnings issued." | |
| 911 (interactive) | |
| 912 (with-displaying-help-buffer | |
| 913 (lambda () | |
| 914 (let ((buf (get-buffer "*Warnings*"))) | |
| 915 (when buf | |
| 916 (save-excursion | |
| 917 (set-buffer standard-output) | |
| 918 (map-extents | |
| 919 #'(lambda (extent arg) | |
| 920 (goto-char (point-min)) | |
| 921 (insert (extent-string extent))) | |
| 922 buf))))) | |
| 923 "warnings")) | |
| 924 | |
| 925 (defun view-lossage (&optional no-keys) | |
| 428 | 926 "Display recent input keystrokes and recent minibuffer messages. |
| 927 The number of keys shown is controlled by `view-lossage-key-count'. | |
| 1038 | 928 The number of messages shown is controlled by `view-lossage-message-count'. |
| 929 | |
| 930 If optional arg NO-KEYS (prefix arg, interactively) is non-nil, | |
| 931 then recent input keystrokes output is omitted." | |
| 932 (interactive "P") | |
| 428 | 933 (with-displaying-help-buffer |
| 934 (lambda () | |
| 793 | 935 (unless no-keys |
| 936 (princ (key-description (recent-keys view-lossage-key-count))) | |
| 937 (save-excursion | |
| 938 (set-buffer standard-output) | |
| 939 (goto-char (point-min)) | |
| 940 (insert "Recent keystrokes:\n\n") | |
| 941 (while (progn (move-to-column 50) (not (eobp))) | |
| 942 (search-forward " " nil t) | |
| 943 (insert "\n"))) | |
| 944 (princ "\n\n\n")) | |
| 945 ;; Copy the messages from " *Message-Log*", reversing their order and | |
| 946 ;; handling multiline messages correctly. | |
| 947 (princ "Recent minibuffer messages (most recent first):\n\n") | |
| 428 | 948 (print-recent-messages view-lossage-message-count)) |
| 949 "lossage")) | |
| 950 | |
| 951 (define-function 'help 'help-for-help) | |
| 952 | |
| 953 (make-help-screen help-for-help | |
| 954 "A B C F I K L M N P S T V W C-c C-d C-f C-i C-k C-n C-w; ? for more help:" | |
| 502 | 955 (concat |
| 956 "Type a Help option: | |
| 428 | 957 \(Use SPC or DEL to scroll through this text. Type \\<help-map>\\[help-quit] to exit the Help command.) |
| 958 | |
| 502 | 959 Help on key bindings: |
| 960 | |
| 961 \\[describe-bindings] Table of all key bindings. | |
| 962 \\[describe-key-briefly] Type a key sequence or select a menu item; | |
| 963 it displays the corresponding command name. | |
| 964 \\[describe-key] Type a key sequence or select a menu item; | |
| 965 it displays the documentation for the command bound to that key. | |
| 966 (Terser but more up-to-date than what's in the manual.) | |
| 967 \\[Info-goto-emacs-key-command-node] Type a key sequence or select a menu item; | |
| 968 it jumps to the full documentation in the XEmacs User's Manual | |
| 969 for the corresponding command. | |
| 970 \\[view-lossage] Recent input keystrokes and minibuffer messages. | |
| 971 \\[describe-mode] Documentation of current major and minor modes. | |
| 972 \\[describe-pointer] Table of all mouse-button bindings. | |
| 973 \\[where-is] Type a command name; it displays which keystrokes invoke that command. | |
| 974 | |
| 975 Help on functions and variables: | |
| 976 | |
| 428 | 977 \\[hyper-apropos] Type a substring; it shows a hypertext list of |
| 978 functions and variables that contain that substring. | |
| 502 | 979 \\[command-apropos] Older version of apropos; superseded by previous command. |
| 980 \\[apropos-documentation] Type a substring; it shows a hypertext list of | |
| 981 functions and variables containing that substring anywhere | |
| 982 in their documentation. | |
| 983 \\[Info-goto-emacs-command-node] Type a command name; it jumps to the full documentation | |
| 984 in the XEmacs User's Manual. | |
| 985 \\[describe-function] Type a command or function name; it shows its documentation. | |
| 986 (Terser but more up-to-date than what's in the manual.) | |
| 987 \\[Info-elisp-ref] Type a function name; it jumps to the full documentation | |
| 988 in the XEmacs Lisp Reference Manual. | |
| 989 \\[Info-search-index-in-xemacs-and-lispref] Type a substring; it looks it up in the indices of both | |
| 990 the XEmacs User's Manual and the XEmacs Lisp Reference Manual. | |
| 991 It jumps to the first match (preferring an exact match); you | |
| 992 can use `\\<Info-mode-map>\\[Info-index-next]\\<help-map>' to successively visit other matches. | |
| 993 \\[describe-variable] Type a variable name; it displays its documentation and value. | |
| 994 | |
| 995 Miscellaneous: | |
| 996 | |
| 997 " | |
| 998 (if (string-match "beta" emacs-version) | |
| 999 "\\[describe-beta] Special considerations about running a beta version of XEmacs. | |
| 1000 " | |
| 1001 "") | |
| 1002 " | |
| 3074 | 1003 \\[view-xemacs-problems] Known problems. |
| 428 | 1004 \\[customize] Customize Emacs options. |
| 502 | 1005 \\[describe-distribution] How to obtain XEmacs. |
| 1006 \\[describe-last-error] Information about the most recent error. | |
| 428 | 1007 \\[xemacs-local-faq] Local copy of the XEmacs FAQ. |
| 1008 \\[info] Info documentation reader. | |
| 1009 \\[Info-query] Type an Info file name; it displays it in Info reader. | |
| 502 | 1010 \\[describe-copying] XEmacs copying permission (General Public License). |
| 428 | 1011 \\[view-emacs-news] News of recent XEmacs changes. |
| 1012 \\[finder-by-keyword] Type a topic keyword; it finds matching packages. | |
| 1013 \\[describe-syntax] Contents of syntax table with explanations. | |
| 502 | 1014 \\[view-sample-init-el] View the sample init.el that comes with XEmacs. |
| 428 | 1015 \\[help-with-tutorial] XEmacs learn-by-doing tutorial. |
| 502 | 1016 \\[describe-no-warranty] Information on absence of warranty for XEmacs." |
| 1017 ) | |
| 428 | 1018 help-map) |
| 1019 | |
| 1020 (defun function-called-at-point () | |
| 1021 "Return the function which is called by the list containing point. | |
| 1022 If that gives no function, return the function whose name is around point. | |
| 1023 If that doesn't give a function, return nil." | |
| 1024 (or (ignore-errors | |
| 1025 (save-excursion | |
| 1026 (save-restriction | |
| 1027 (narrow-to-region (max (point-min) (- (point) 1000)) | |
| 1028 (point-max)) | |
| 1029 (backward-up-list 1) | |
| 1030 (forward-char 1) | |
| 1031 (let (obj) | |
| 1032 (setq obj (read (current-buffer))) | |
| 1033 (and (symbolp obj) (fboundp obj) obj))))) | |
| 1034 (ignore-errors | |
| 1035 (with-syntax-table emacs-lisp-mode-syntax-table | |
| 1036 (save-excursion | |
| 1037 (or (not (zerop (skip-syntax-backward "_w"))) | |
| 1038 (eq (char-syntax (char-after (point))) ?w) | |
| 1039 (eq (char-syntax (char-after (point))) ?_) | |
| 1040 (forward-sexp -1)) | |
| 1041 (skip-chars-forward "`'") | |
| 1042 (let ((obj (read (current-buffer)))) | |
| 1043 (and (symbolp obj) (fboundp obj) obj))))))) | |
| 1044 | |
| 1045 (defun function-at-point () | |
| 1046 "Return the function whose name is around point. | |
| 1047 If that gives no function, return the function which is called by the | |
| 1048 list containing point. If that doesn't give a function, return nil." | |
| 1049 (or (ignore-errors | |
| 1050 (with-syntax-table emacs-lisp-mode-syntax-table | |
| 1051 (save-excursion | |
| 1052 (or (not (zerop (skip-syntax-backward "_w"))) | |
| 1053 (eq (char-syntax (char-after (point))) ?w) | |
| 1054 (eq (char-syntax (char-after (point))) ?_) | |
| 1055 (forward-sexp -1)) | |
| 1056 (skip-chars-forward "`'") | |
| 1057 (let ((obj (read (current-buffer)))) | |
| 1058 (and (symbolp obj) (fboundp obj) obj))))) | |
| 1059 (ignore-errors | |
| 1060 (save-excursion | |
| 1061 (save-restriction | |
| 1062 (narrow-to-region (max (point-min) (- (point) 1000)) | |
| 1063 (point-max)) | |
| 1064 (backward-up-list 1) | |
| 1065 (forward-char 1) | |
| 1066 (let (obj) | |
| 1067 (setq obj (read (current-buffer))) | |
| 1068 (and (symbolp obj) (fboundp obj) obj))))))) | |
| 1069 | |
| 442 | 1070 (defun function-at-event (event) |
| 1071 "Return the function whose name is around the position of EVENT. | |
| 1072 EVENT should be a mouse event. When calling from a popup or context menu, | |
| 1073 use `last-popup-menu-event' to find out where the mouse was clicked. | |
| 1074 \(You cannot use (interactive \"e\"), unfortunately. This returns a | |
| 1075 misc-user event.) | |
| 1076 | |
| 1077 If the event contains no position, or the position is not over text, or | |
| 1078 there is no function around that point, nil is returned." | |
| 1079 (if (and event (event-buffer event) (event-point event)) | |
| 1080 (save-excursion | |
| 1081 (set-buffer (event-buffer event)) | |
| 1082 (goto-char (event-point event)) | |
| 1083 (function-at-point)))) | |
| 1084 | |
| 428 | 1085 ;; Default to nil for the non-hackers? Not until we find a way to |
| 1086 ;; distinguish hackers from non-hackers automatically! | |
| 1087 (defcustom describe-function-show-arglist t | |
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1088 "*If non-nil, describe-function will show the function's arglist." |
| 428 | 1089 :type 'boolean |
| 1090 :group 'help-appearance) | |
| 1091 | |
| 3368 | 1092 (define-obsolete-function-alias |
| 1093 ;; Moved to using the version in loadhist.el | |
| 1094 'describe-function-find-symbol | |
| 1095 'symbol-file) | |
| 428 | 1096 |
| 1097 (define-obsolete-function-alias | |
| 1098 'describe-function-find-file | |
| 3368 | 1099 'symbol-file) |
| 428 | 1100 |
| 1101 (defun describe-function (function) | |
| 1102 "Display the full documentation of FUNCTION (a symbol). | |
| 1103 When run interactively, it defaults to any function found by | |
| 1104 `function-at-point'." | |
| 1105 (interactive | |
| 1106 (let* ((fn (function-at-point)) | |
| 1107 (val (let ((enable-recursive-minibuffers t)) | |
| 1108 (completing-read | |
| 1109 (if fn | |
| 1110 (format (gettext "Describe function (default %s): ") | |
| 1111 fn) | |
| 1112 (gettext "Describe function: ")) | |
| 430 | 1113 obarray 'fboundp t nil 'function-history |
| 1114 (symbol-name fn))))) | |
| 1115 (list (intern val)))) | |
| 428 | 1116 (with-displaying-help-buffer |
| 1117 (lambda () | |
| 1118 (describe-function-1 function) | |
| 1119 ;; Return the text we displayed. | |
| 1120 (buffer-string nil nil standard-output)) | |
| 1121 (format "function `%s'" function))) | |
| 1122 | |
| 1123 (defun function-obsolete-p (function) | |
| 1124 "Return non-nil if FUNCTION is obsolete." | |
| 1125 (not (null (get function 'byte-obsolete-info)))) | |
| 1126 | |
| 1127 (defun function-obsoleteness-doc (function) | |
| 1128 "If FUNCTION is obsolete, return a string describing this." | |
| 1129 (let ((obsolete (get function 'byte-obsolete-info))) | |
| 1130 (if obsolete | |
| 1131 (format "Obsolete; %s" | |
| 1132 (if (stringp (car obsolete)) | |
| 1133 (car obsolete) | |
| 1134 (format "use `%s' instead." (car obsolete))))))) | |
| 1135 | |
| 1136 (defun function-compatible-p (function) | |
| 1137 "Return non-nil if FUNCTION is present for Emacs compatibility." | |
| 1138 (not (null (get function 'byte-compatible-info)))) | |
| 1139 | |
| 1140 (defun function-compatibility-doc (function) | |
| 1141 "If FUNCTION is Emacs compatible, return a string describing this." | |
| 1142 (let ((compatible (get function 'byte-compatible-info))) | |
| 1143 (if compatible | |
| 1144 (format "Emacs Compatible; %s" | |
| 1145 (if (stringp (car compatible)) | |
| 1146 (car compatible) | |
| 1147 (format "use `%s' instead." (car compatible))))))) | |
| 1148 | |
| 1149 ;Here are all the possibilities below spelled out, for the benefit | |
| 1150 ;of the I18N3 snarfer. | |
| 1151 ; | |
| 1152 ;(gettext "a built-in function") | |
| 1153 ;(gettext "an interactive built-in function") | |
| 1154 ;(gettext "a built-in macro") | |
| 1155 ;(gettext "an interactive built-in macro") | |
| 1156 ;(gettext "a compiled Lisp function") | |
| 1157 ;(gettext "an interactive compiled Lisp function") | |
| 1158 ;(gettext "a compiled Lisp macro") | |
| 1159 ;(gettext "an interactive compiled Lisp macro") | |
| 1160 ;(gettext "a Lisp function") | |
| 1161 ;(gettext "an interactive Lisp function") | |
| 1162 ;(gettext "a Lisp macro") | |
| 1163 ;(gettext "an interactive Lisp macro") | |
| 1164 ;(gettext "an autoloaded Lisp function") | |
| 1165 ;(gettext "an interactive autoloaded Lisp function") | |
| 1166 ;(gettext "an autoloaded Lisp macro") | |
| 1167 ;(gettext "an interactive autoloaded Lisp macro") | |
| 1168 | |
| 1169 ;; taken out of `describe-function-1' | |
| 1170 (defun function-arglist (function) | |
| 1171 "Return a string giving the argument list of FUNCTION. | |
| 1172 For example: | |
| 1173 | |
| 1174 (function-arglist 'function-arglist) | |
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1175 => \"(function-arglist FUNCTION)\" |
| 428 | 1176 |
| 1177 This function is used by `describe-function-1' to list function | |
| 1178 arguments in the standard Lisp style." | |
| 440 | 1179 (let* ((fnc (indirect-function function)) |
| 1180 (fndef (if (eq (car-safe fnc) 'macro) | |
| 1181 (cdr fnc) | |
| 1182 fnc)) | |
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1183 (args (cdr (function-documentation-1 function t))) |
| 428 | 1184 (arglist |
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1185 (or args |
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1186 (cond ((compiled-function-p fndef) |
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1187 (compiled-function-arglist fndef)) |
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1188 ((eq (car-safe fndef) 'lambda) |
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1189 (nth 1 fndef)) |
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1190 ((or (subrp fndef) (eq 'autoload (car-safe fndef))) |
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1191 |
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1192 ;; If there are no arguments documented for the |
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1193 ;; subr, rather don't print anything. |
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1194 (cond ((null args) t) |
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1195 ((equal args "") nil) |
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1196 (args))) |
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1197 (t t)))) |
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1198 (print-gensym nil)) |
| 428 | 1199 (cond ((listp arglist) |
| 1200 (prin1-to-string | |
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1201 (cons function (loop |
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1202 for arg in arglist |
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1203 collect (if (memq arg '(&optional &rest)) |
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1204 arg |
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1205 (make-symbol (upcase (symbol-name |
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1206 arg)))))) |
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1207 |
| 428 | 1208 t)) |
| 1209 ((stringp arglist) | |
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1210 (if (> (length arglist) 0) |
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1211 (format "(%s %s)" function arglist) |
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1212 (format "(%s)" function)))))) |
| 428 | 1213 |
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1214 ;; If STRIP-ARGLIST is true, return a cons (DOC . ARGS) of the documentation |
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1215 ;; with any embedded arglist stripped out, and the arglist that was stripped |
| 5071 | 1216 ;; out. If STRIP-ARGLIST is false, the cons will be (FULL-DOC . nil), |
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1217 ;; where FULL-DOC is the full documentation without the embedded arglist |
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1218 ;; stripped out. |
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1219 (defun function-documentation-1 (function &optional strip-arglist) |
| 428 | 1220 (let ((doc (condition-case nil |
| 1221 (or (documentation function) | |
| 1222 (gettext "not documented")) | |
| 2275 | 1223 (void-function "(alias for undefined function)") |
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1224 (error "(unexpected error from `documentation')"))) |
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1225 args) |
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1226 (when (and strip-arglist |
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1227 (string-match "[\n\t ]*\narguments: ?(\\(.*\\))\n?\\'" doc)) |
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1228 (setq args (match-string 1 doc)) |
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1229 (setq doc (substring doc 0 (match-beginning 0))) |
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1230 (and args (setq args (replace-in-string args "[ ]*\\\\\n[ \t]*" " " t))) |
|
5366
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1231 (and (eql 0 (length doc)) (setq doc (gettext "not documented")))) |
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1232 (cons doc args))) |
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1233 |
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1234 (defun function-documentation (function &optional strip-arglist) |
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1235 "Return a string giving the documentation for FUNCTION, if any. |
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1236 If the optional argument STRIP-ARGLIST is non-nil, remove the arglist |
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1237 part of the documentation of internal subroutines, CL lambda forms, etc." |
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1238 (car (function-documentation-1 function strip-arglist))) |
| 442 | 1239 |
| 462 | 1240 ;; replacement for `princ' that puts the text in the specified face, |
| 1241 ;; if possible | |
| 1242 (defun Help-princ-face (object face) | |
| 1243 (cond ((bufferp standard-output) | |
| 464 | 1244 (let ((opoint (point standard-output))) |
| 1245 (princ object) | |
| 1246 (put-nonduplicable-text-property opoint (point standard-output) | |
| 1247 'face face standard-output))) | |
| 1248 ((markerp standard-output) | |
| 1249 (let ((buf (marker-buffer standard-output)) | |
| 1250 (pos (marker-position standard-output))) | |
| 1251 (princ object) | |
| 1252 (put-nonduplicable-text-property | |
| 1253 pos (marker-position standard-output) 'face face buf))) | |
| 1779 | 1254 (t (princ object)))) |
| 462 | 1255 |
| 1256 ;; replacement for `prin1' that puts the text in the specified face, | |
| 1257 ;; if possible | |
| 1258 (defun Help-prin1-face (object face) | |
| 1259 (cond ((bufferp standard-output) | |
| 464 | 1260 (let ((opoint (point standard-output))) |
| 1261 (prin1 object) | |
| 1262 (put-nonduplicable-text-property opoint (point standard-output) | |
| 1263 'face face standard-output))) | |
| 1264 ((markerp standard-output) | |
| 1265 (let ((buf (marker-buffer standard-output)) | |
| 1266 (pos (marker-position standard-output))) | |
| 1267 (prin1 object) | |
| 1268 (put-nonduplicable-text-property | |
| 1269 pos (marker-position standard-output) 'face face buf))) | |
| 1779 | 1270 (t (prin1 object)))) |
| 462 | 1271 |
| 442 | 1272 (defvar help-symbol-regexp |
| 1273 (let ((sym-char "[+a-zA-Z0-9_:*]") | |
| 1274 (sym-char-no-dash "[-+a-zA-Z0-9_:*]")) | |
| 1275 (concat "\\(" | |
| 1276 ;; a symbol with a - in it. | |
| 1277 "\\<\\(" sym-char-no-dash "+\\(-" sym-char-no-dash "+\\)+\\)\\>" | |
| 1278 "\\|" | |
| 1279 "`\\(" sym-char "+\\)'" | |
| 1280 "\\)"))) | |
| 1281 | |
| 1282 (defun help-symbol-run-function-1 (ev ex fun) | |
| 1283 (let ((help-sticky-window | |
| 1284 ;; if we were called from a help buffer, make sure the new help | |
| 1285 ;; goes in the same window. | |
| 1286 (if (and (event-buffer ev) | |
| 1287 (symbol-value-in-buffer 'help-window-config | |
| 1288 (event-buffer ev))) | |
| 1289 (event-window ev) | |
| 1290 help-sticky-window))) | |
| 1291 (funcall fun (extent-property ex 'help-symbol)))) | |
| 1292 | |
| 1293 (defun help-symbol-run-function (fun) | |
| 1294 (let ((ex (extent-at-event last-popup-menu-event 'help-symbol))) | |
| 1295 (when ex | |
| 1296 (help-symbol-run-function-1 last-popup-menu-event ex fun)))) | |
| 1297 | |
| 1298 (defvar help-symbol-function-context-menu | |
| 462 | 1299 '(["View %_Documentation" (help-symbol-run-function 'describe-function)] |
| 4103 | 1300 ["Find %_Function Source" (help-symbol-run-function 'find-function) |
|
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1301 (fboundp 'find-function)] |
| 462 | 1302 ["Find %_Tag" (help-symbol-run-function 'find-tag)] |
| 442 | 1303 )) |
| 1304 | |
| 1305 (defvar help-symbol-variable-context-menu | |
| 462 | 1306 '(["View %_Documentation" (help-symbol-run-function 'describe-variable)] |
| 4103 | 1307 ["Find %_Variable Source" (help-symbol-run-function 'find-variable) |
|
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1308 (fboundp 'find-variable)] |
| 462 | 1309 ["Find %_Tag" (help-symbol-run-function 'find-tag)] |
| 442 | 1310 )) |
| 1311 | |
| 1312 (defvar help-symbol-function-and-variable-context-menu | |
| 462 | 1313 '(["View Function %_Documentation" (help-symbol-run-function |
| 442 | 1314 'describe-function)] |
| 1315 ["View Variable D%_ocumentation" (help-symbol-run-function | |
| 1316 'describe-variable)] | |
| 4103 | 1317 ["Find %_Function Source" (help-symbol-run-function 'find-function) |
|
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1318 (fboundp 'find-function)] |
| 4103 | 1319 ["Find %_Variable Source" (help-symbol-run-function 'find-variable) |
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1320 (fboundp 'find-variable)] |
| 462 | 1321 ["Find %_Tag" (help-symbol-run-function 'find-tag)] |
| 442 | 1322 )) |
| 1323 | |
| 1324 (defun frob-help-extents (buffer) | |
| 1325 ;; Look through BUFFER, starting at the buffer's point and continuing | |
| 1326 ;; till end of file, and find documented functions and variables. | |
| 1327 ;; any such symbol found is tagged with an extent, that sets up these | |
| 1328 ;; properties: | |
| 1329 ;; 1. mouse-face is 'highlight (so the extent gets highlighted on mouse over) | |
| 1330 ;; 2. help-symbol is the name of the symbol. | |
| 464 | 1331 ;; 3. face is 'hyper-apropos-hyperlink. |
| 462 | 1332 ;; 4. context-menu is a list of context menu items, specific to whether |
| 442 | 1333 ;; the symbol is a function, variable, or both. |
| 462 | 1334 ;; 5. activate-function will cause the function or variable to be described, |
| 442 | 1335 ;; replacing the existing help contents. |
| 1336 (save-excursion | |
| 1337 (set-buffer buffer) | |
| 1338 (let (b e name) | |
| 1339 (while (re-search-forward help-symbol-regexp nil t) | |
| 1340 (setq b (or (match-beginning 2) (match-beginning 4))) | |
| 1341 (setq e (or (match-end 2) (match-end 4))) | |
| 1342 (setq name (buffer-substring b e)) | |
| 1343 (let* ((sym (intern-soft name)) | |
| 1344 (var (and sym (boundp sym) | |
| 1345 (documentation-property sym | |
| 1346 'variable-documentation t))) | |
| 1347 (fun (and sym (fboundp sym) | |
| 2275 | 1348 (condition-case nil |
| 1349 (documentation sym t) | |
| 1350 (void-function "(alias for undefined function)") | |
| 1351 (error "(unexpected error from `documention')"))))) | |
| 442 | 1352 (when (or var fun) |
| 1353 (let ((ex (make-extent b e))) | |
| 622 | 1354 (require 'hyper-apropos) |
| 3368 | 1355 |
| 442 | 1356 (set-extent-property ex 'mouse-face 'highlight) |
| 1357 (set-extent-property ex 'help-symbol sym) | |
| 464 | 1358 (set-extent-property ex 'face 'hyper-apropos-hyperlink) |
| 442 | 1359 (set-extent-property |
| 1360 ex 'context-menu | |
| 1361 (cond ((and var fun) | |
| 1362 help-symbol-function-and-variable-context-menu) | |
| 1363 (var help-symbol-variable-context-menu) | |
| 1364 (fun help-symbol-function-context-menu))) | |
| 1365 (set-extent-property | |
| 1366 ex 'activate-function | |
| 1367 (if fun | |
| 1368 #'(lambda (ev ex) | |
| 1369 (help-symbol-run-function-1 ev ex 'describe-function)) | |
| 1370 #'(lambda (ev ex) | |
| 1371 (help-symbol-run-function-1 ev ex 'describe-variable)))) | |
| 1372 ))))))) ;; 11 parentheses! | |
| 428 | 1373 |
| 1374 (defun describe-function-1 (function &optional nodoc) | |
| 1375 "This function does the work for `describe-function'." | |
| 462 | 1376 (princ "`") |
| 1377 ;; (Help-princ-face function 'font-lock-function-name-face) overkill | |
| 1378 (princ function) | |
| 1379 (princ "' is ") | |
| 428 | 1380 (let* ((def function) |
|
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1381 aliases file-name kbd-macro-p fndef macrop) |
| 428 | 1382 (while (and (symbolp def) (fboundp def)) |
| 1383 (when (not (eq def function)) | |
| 1384 (setq aliases | |
| 1385 (if aliases | |
| 1386 ;; I18N3 Need gettext due to concat | |
| 1387 (concat aliases | |
| 1388 (format | |
| 1389 "\n which is an alias for `%s', " | |
| 1390 (symbol-name def))) | |
| 1391 (format "an alias for `%s', " (symbol-name def))))) | |
| 1392 (setq def (symbol-function def))) | |
| 1393 (if (eq 'macro (car-safe def)) | |
| 1394 (setq fndef (cdr def) | |
| 1395 macrop t) | |
| 1396 (setq fndef def)) | |
| 1397 (if aliases (princ aliases)) | |
|
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1398 (labels |
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1399 ((int (string an-p macro-p) |
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1400 (princ (format |
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1401 (gettext (concat |
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1402 (cond ((commandp def) |
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1403 "an interactive ") |
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1404 (an-p "an ") |
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1405 (t "a ")) |
|
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1406 "%s" |
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1407 (cond |
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1408 ((eq 'neither macro-p) |
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1409 "") |
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1410 (macro-p " macro") |
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1411 (t " function")))) |
|
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|
1412 string)))) |
|
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1413 (declare (inline int)) |
| 428 | 1414 (cond ((or (stringp def) (vectorp def)) |
| 1415 (princ "a keyboard macro.") | |
| 1416 (setq kbd-macro-p t)) | |
|
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1417 ((special-operator-p fndef) |
|
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1418 (int "built-in special operator" nil 'neither)) |
| 428 | 1419 ((subrp fndef) |
|
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|
1420 (int "built-in" nil macrop)) |
| 428 | 1421 ((compiled-function-p fndef) |
|
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1422 (int (concat (if (built-in-symbol-file function 'defun) |
|
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|
1423 "built-in " |
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1424 "") "compiled Lisp") nil macrop)) |
| 428 | 1425 ((eq (car-safe fndef) 'lambda) |
|
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|
1426 (int "Lisp" nil macrop)) |
| 428 | 1427 ((eq (car-safe def) 'autoload) |
|
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1428 (int "autoloaded Lisp" t (elt def 4))) |
| 428 | 1429 ((and (symbolp def) (not (fboundp def))) |
| 1430 (princ "a symbol with a void (unbound) function definition.")) | |
| 1431 (t | |
| 1432 nil))) | |
| 1433 (princ "\n") | |
| 1434 (or file-name | |
|
4535
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|
1435 (setq file-name (symbol-file function 'defun))) |
| 3368 | 1436 (when file-name |
| 1437 (princ " -- loaded from \"") | |
| 1438 (if (not (bufferp standard-output)) | |
| 1439 (princ file-name) | |
| 1440 (let ((opoint (point standard-output)) | |
| 1441 e) | |
| 1442 (require 'hyper-apropos) | |
| 1443 (princ file-name) | |
| 1444 (setq e (make-extent opoint (point standard-output) | |
| 1445 standard-output)) | |
| 1446 (set-extent-property e 'face 'hyper-apropos-hyperlink) | |
| 1447 (set-extent-property e 'mouse-face 'highlight) | |
| 1448 (set-extent-property e 'find-function-symbol function))) | |
| 1449 (princ "\"\n")) | |
| 428 | 1450 (if describe-function-show-arglist |
| 1451 (let ((arglist (function-arglist function))) | |
| 1452 (when arglist | |
| 464 | 1453 (require 'hyper-apropos) |
| 1454 (Help-princ-face arglist 'hyper-apropos-documentation) | |
| 428 | 1455 (terpri)))) |
| 1456 (terpri) | |
| 1457 (cond (kbd-macro-p | |
| 1458 (princ "These characters are executed:\n\n\t") | |
| 1459 (princ (key-description def)) | |
| 1460 (cond ((setq def (key-binding def)) | |
| 1461 (princ (format "\n\nwhich executes the command `%s'.\n\n" | |
| 1462 def)) | |
| 1463 (describe-function-1 def)))) | |
| 1464 (nodoc nil) | |
| 1465 (t | |
| 1466 ;; tell the user about obsoleteness. | |
| 1467 ;; If the function is obsolete and is aliased, don't | |
| 1468 ;; even bother to report the documentation, as a further | |
| 1469 ;; encouragement to use the new function. | |
| 1470 (let ((obsolete (function-obsoleteness-doc function)) | |
| 1471 (compatible (function-compatibility-doc function))) | |
| 1472 (when obsolete | |
| 1473 (princ obsolete) | |
| 1474 (terpri) | |
| 1475 (terpri)) | |
| 1476 (when compatible | |
| 1477 (princ compatible) | |
| 1478 (terpri) | |
| 1479 (terpri)) | |
| 1480 (unless (and obsolete aliases) | |
| 1481 (let ((doc (function-documentation function t))) | |
| 1482 (princ "Documentation:\n") | |
| 442 | 1483 (let ((oldp (point standard-output)) |
| 1484 newp) | |
| 1485 (princ doc) | |
| 1486 (setq newp (point standard-output)) | |
| 1487 (goto-char oldp standard-output) | |
| 1488 (frob-help-extents standard-output) | |
| 1489 (goto-char newp standard-output)) | |
| 428 | 1490 (unless (or (equal doc "") |
| 1491 (eq ?\n (aref doc (1- (length doc))))) | |
|
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|
1492 (terpri))) |
|
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|
1493 (when (commandp function) |
|
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|
1494 (princ "\nInvoked with:\n") |
|
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Within #'describe-function, say what commands are bound to.
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|
1495 (let ((global-binding |
|
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Within #'describe-function, say what commands are bound to.
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|
1496 (where-is-internal function global-map)) |
|
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|
1497 (global-tty-binding |
|
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|
1498 (where-is-internal function global-tty-map)) |
|
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Within #'describe-function, say what commands are bound to.
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1499 (global-window-system-binding |
|
5679
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1500 (where-is-internal function global-window-system-map)) |
|
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|
1501 (command-remapping (command-remapping function)) |
|
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|
1502 (commands-remapped-to (commands-remapped-to function))) |
|
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|
1503 (if (or global-binding global-tty-binding |
|
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Within #'describe-function, say what commands are bound to.
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|
1504 global-window-system-binding) |
|
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Within #'describe-function, say what commands are bound to.
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|
1505 (if (and (equal global-binding |
|
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Within #'describe-function, say what commands are bound to.
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|
1506 global-tty-binding) |
|
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Within #'describe-function, say what commands are bound to.
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|
1507 (equal global-binding |
|
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|
1508 global-window-system-binding)) |
|
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1509 (princ |
|
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Within #'describe-function, say what commands are bound to.
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1510 (substitute-command-keys |
|
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Within #'describe-function, say what commands are bound to.
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|
1511 (format "\n\\[%s]" function))) |
|
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|
1512 (when (and global-window-system-binding |
|
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Within #'describe-function, say what commands are bound to.
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|
1513 (not (equal global-window-system-binding |
|
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|
1514 global-binding))) |
|
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|
1515 (princ |
|
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|
1516 (format |
|
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|
1517 "\n%s\n -- under window systems\n" |
|
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Within #'describe-function, say what commands are bound to.
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|
1518 (mapconcat #'key-description |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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4246
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|
1519 global-window-system-binding |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4246
diff
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|
1520 ", ")))) |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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4246
diff
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|
1521 (when (and global-tty-binding |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4246
diff
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|
1522 (not (equal global-tty-binding |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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4246
diff
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|
1523 global-binding))) |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1524 (princ |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
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4246
diff
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|
1525 (format |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1526 "\n%s\n -- under TTYs\n" |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
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4246
diff
changeset
|
1527 (mapconcat #'key-description |
|
4ba890988caa
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4246
diff
changeset
|
1528 global-tty-binding |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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4246
diff
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|
1529 ", ")))) |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
Aidan Kehoe <kehoea@parhasard.net>
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|
1530 (when global-binding |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
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|
1531 (princ |
|
4ba890988caa
Within #'describe-function, say what commands are bound to.
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|
1532 (format |
|
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|
1533 "\n%s\n -- generally (that is, unless\ |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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|
1534 overridden by TTY- or |
|
4ba890988caa
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Aidan Kehoe <kehoea@parhasard.net>
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|
1535 window-system-specific mappings)\n" |
|
5679
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|
1536 (mapconcat #'key-description global-binding |
|
4335
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|
1537 ", "))))) |
|
5679
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|
1538 (if command-remapping |
|
a81a739181dc
Add command remapping, a more robust alternative to #'substitute-key-definition
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
1539 (progn |
|
a81a739181dc
Add command remapping, a more robust alternative to #'substitute-key-definition
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|
1540 (princ "Its keys are remapped to `") |
|
a81a739181dc
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|
1541 (princ (symbol-name command-remapping)) |
|
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|
1542 (princ "'.\n")) |
|
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|
1543 (princ (substitute-command-keys |
|
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|
1544 (format "\n\\[%s]" function)))) |
|
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|
1545 (when commands-remapped-to |
|
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|
1546 (if (cdr commands-remapped-to) |
|
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|
1547 (princ (format "The following functions are \ |
|
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|
1548 remapped to it:\n`%s'" (mapconcat #'prin1-to-string commands-remapped-to |
|
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|
1549 "', `"))) |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1550 (princ (format "`%s' is remapped to it.\n" |
|
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|
1551 (car |
|
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1552 commands-remapped-to)))))))))))))) |
| 428 | 1553 |
| 1554 ;;; [Obnoxious, whining people who complain very LOUDLY on Usenet | |
| 1555 ;;; are binding this to keys.] | |
| 1556 (defun describe-function-arglist (function) | |
| 1557 (interactive (list (or (function-at-point) | |
| 1558 (error "no function call at point")))) | |
| 1559 (message nil) | |
| 1560 (message (function-arglist function))) | |
| 1561 | |
| 1562 (defun variable-at-point () | |
| 1563 (ignore-errors | |
| 1564 (with-syntax-table emacs-lisp-mode-syntax-table | |
| 1565 (save-excursion | |
| 1566 (or (not (zerop (skip-syntax-backward "_w"))) | |
| 1567 (eq (char-syntax (char-after (point))) ?w) | |
| 1568 (eq (char-syntax (char-after (point))) ?_) | |
| 1569 (forward-sexp -1)) | |
| 1570 (skip-chars-forward "'") | |
| 1571 (let ((obj (read (current-buffer)))) | |
| 1572 (and (symbolp obj) (boundp obj) obj)))))) | |
| 1573 | |
| 442 | 1574 (defun variable-at-event (event) |
| 1575 "Return the variable whose name is around the position of EVENT. | |
| 1576 EVENT should be a mouse event. When calling from a popup or context menu, | |
| 1577 use `last-popup-menu-event' to find out where the mouse was clicked. | |
| 1578 \(You cannot use (interactive \"e\"), unfortunately. This returns a | |
| 1579 misc-user event.) | |
| 1580 | |
| 1581 If the event contains no position, or the position is not over text, or | |
| 1582 there is no variable around that point, nil is returned." | |
| 1583 (if (and event (event-buffer event) (event-point event)) | |
| 1584 (save-excursion | |
| 1585 (set-buffer (event-buffer event)) | |
| 1586 (goto-char (event-point event)) | |
| 1587 (variable-at-point)))) | |
| 1588 | |
| 428 | 1589 (defun variable-obsolete-p (variable) |
| 1590 "Return non-nil if VARIABLE is obsolete." | |
| 1591 (not (null (get variable 'byte-obsolete-variable)))) | |
| 1592 | |
| 1593 (defun variable-obsoleteness-doc (variable) | |
| 1594 "If VARIABLE is obsolete, return a string describing this." | |
| 1595 (let ((obsolete (get variable 'byte-obsolete-variable))) | |
| 1596 (if obsolete | |
| 1597 (format "Obsolete; %s" | |
| 1598 (if (stringp obsolete) | |
| 1599 obsolete | |
| 1600 (format "use `%s' instead." obsolete)))))) | |
| 1601 | |
| 1602 (defun variable-compatible-p (variable) | |
| 1603 "Return non-nil if VARIABLE is Emacs compatible." | |
| 1604 (not (null (get variable 'byte-compatible-variable)))) | |
| 1605 | |
| 1606 (defun variable-compatibility-doc (variable) | |
| 1607 "If VARIABLE is Emacs compatible, return a string describing this." | |
| 1608 (let ((compatible (get variable 'byte-compatible-variable))) | |
| 1609 (if compatible | |
| 1610 (format "Emacs Compatible; %s" | |
| 1611 (if (stringp compatible) | |
| 1612 compatible | |
| 1613 (format "use `%s' instead." compatible)))))) | |
| 1614 | |
| 1615 (defun built-in-variable-doc (variable) | |
| 1616 "Return a string describing whether VARIABLE is built-in." | |
| 1617 (let ((type (built-in-variable-type variable))) | |
| 1618 (case type | |
| 1619 (integer "a built-in integer variable") | |
| 1620 (const-integer "a built-in constant integer variable") | |
| 1621 (boolean "a built-in boolean variable") | |
| 1622 (const-boolean "a built-in constant boolean variable") | |
| 1623 (object "a simple built-in variable") | |
| 1624 (const-object "a simple built-in constant variable") | |
| 1625 (const-specifier "a built-in constant specifier variable") | |
| 1626 (current-buffer "a built-in buffer-local variable") | |
| 1627 (const-current-buffer "a built-in constant buffer-local variable") | |
| 1628 (default-buffer "a built-in default buffer-local variable") | |
| 1629 (selected-console "a built-in console-local variable") | |
| 1630 (const-selected-console "a built-in constant console-local variable") | |
| 1631 (default-console "a built-in default console-local variable") | |
| 1632 (t | |
| 1633 (if type "an unknown type of built-in variable?" | |
| 1634 "a variable declared in Lisp"))))) | |
| 1635 | |
| 1636 (defun describe-variable (variable) | |
| 1637 "Display the full documentation of VARIABLE (a symbol)." | |
| 1638 (interactive | |
| 1639 (let* ((v (variable-at-point)) | |
| 1640 (val (let ((enable-recursive-minibuffers t)) | |
| 1641 (completing-read | |
| 1642 (if v | |
| 1643 (format "Describe variable (default %s): " v) | |
| 1644 (gettext "Describe variable: ")) | |
| 430 | 1645 obarray 'boundp t nil 'variable-history |
| 1646 (symbol-name v))))) | |
| 1647 (list (intern val)))) | |
| 428 | 1648 (with-displaying-help-buffer |
| 1649 (lambda () | |
| 1650 (let ((origvar variable) | |
| 1651 aliases) | |
| 1652 (let ((print-escape-newlines t)) | |
| 462 | 1653 (princ "`") |
| 1654 ;; (Help-princ-face (symbol-name variable) | |
| 502 | 1655 ;; 'font-lock-variable-name-face) overkill |
| 462 | 1656 (princ (symbol-name variable)) |
| 1657 (princ "' is ") | |
| 428 | 1658 (while (variable-alias variable) |
| 1659 (let ((newvar (variable-alias variable))) | |
| 1660 (if aliases | |
| 1661 ;; I18N3 Need gettext due to concat | |
| 1662 (setq aliases | |
| 1663 (concat aliases | |
| 1664 (format "\n which is an alias for `%s'," | |
| 1665 (symbol-name newvar)))) | |
| 1666 (setq aliases | |
| 1667 (format "an alias for `%s'," | |
| 1668 (symbol-name newvar)))) | |
| 1669 (setq variable newvar))) | |
| 1670 (if aliases | |
| 1671 (princ (format "%s" aliases))) | |
| 1672 (princ (built-in-variable-doc variable)) | |
| 1673 (princ ".\n") | |
| 3368 | 1674 (require 'hyper-apropos) |
|
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diff
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|
1675 (let ((file-name (symbol-file variable 'defvar)) |
| 3368 | 1676 opoint e) |
| 1677 (when file-name | |
| 1678 (princ " -- loaded from \"") | |
| 1679 (if (not (bufferp standard-output)) | |
| 1680 (princ file-name) | |
| 1681 (setq opoint (point standard-output)) | |
| 1682 (princ file-name) | |
| 1683 (setq e (make-extent opoint (point standard-output) | |
| 1684 standard-output)) | |
| 1685 (set-extent-property e 'face 'hyper-apropos-hyperlink) | |
| 1686 (set-extent-property e 'mouse-face 'highlight) | |
| 1687 (set-extent-property e 'find-variable-symbol variable)) | |
| 1688 (princ"\"\n"))) | |
| 428 | 1689 (princ "\nValue: ") |
| 464 | 1690 (if (not (boundp variable)) |
| 1691 (Help-princ-face "void\n" 'hyper-apropos-documentation) | |
| 1692 (Help-prin1-face (symbol-value variable) | |
| 1693 'hyper-apropos-documentation) | |
| 428 | 1694 (terpri)) |
| 1695 (terpri) | |
| 1696 (cond ((local-variable-p variable (current-buffer)) | |
| 1697 (let* ((void (cons nil nil)) | |
| 1698 (def (condition-case nil | |
| 1699 (default-value variable) | |
| 1700 (error void)))) | |
| 1701 (princ "This value is specific to the current buffer.\n") | |
| 1702 (if (local-variable-p variable nil) | |
| 1703 (princ "(Its value is local to each buffer.)\n")) | |
| 1704 (terpri) | |
| 1705 (if (if (eq def void) | |
| 1706 (boundp variable) | |
| 1707 (not (eq (symbol-value variable) def))) | |
| 1708 ;; #### I18N3 doesn't localize properly! | |
| 1709 (progn (princ "Default-value: ") | |
| 1710 (if (eq def void) | |
| 1711 (princ "void\n") | |
| 1712 (prin1 def) | |
| 1713 (terpri)) | |
| 1714 (terpri))))) | |
| 1715 ((local-variable-p variable (current-buffer) t) | |
| 1716 (princ "Setting it would make its value buffer-local.\n\n")))) | |
| 1717 (princ "Documentation:") | |
| 1718 (terpri) | |
| 1719 (let ((doc (documentation-property variable 'variable-documentation)) | |
| 1720 (obsolete (variable-obsoleteness-doc origvar)) | |
| 1721 (compatible (variable-compatibility-doc origvar))) | |
| 1722 (when obsolete | |
| 1723 (princ obsolete) | |
| 1724 (terpri) | |
| 1725 (terpri)) | |
| 1726 (when compatible | |
| 1727 (princ compatible) | |
| 1728 (terpri) | |
| 1729 (terpri)) | |
| 1730 ;; don't bother to print anything if variable is obsolete and aliased. | |
| 1731 (when (or (not obsolete) (not aliases)) | |
| 1732 (if doc | |
| 1733 ;; note: documentation-property calls substitute-command-keys. | |
| 442 | 1734 (let ((oldp (point standard-output)) |
| 1735 newp) | |
| 1736 (princ doc) | |
| 1737 (setq newp (point standard-output)) | |
| 1738 (goto-char oldp standard-output) | |
| 1739 (frob-help-extents standard-output) | |
| 1740 (goto-char newp standard-output)) | |
| 428 | 1741 (princ "not documented as a variable.")))) |
| 1742 (terpri))) | |
| 1743 (format "variable `%s'" variable))) | |
| 1744 | |
| 1745 (defun sorted-key-descriptions (keys &optional separator) | |
| 1746 "Sort and separate the key descriptions for KEYS. | |
| 1747 The sorting is done by length (shortest bindings first), and the bindings | |
| 1748 are separated with SEPARATOR (\", \" by default)." | |
| 1749 (mapconcat 'key-description | |
|
5182
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|
1750 (sort* keys #'< :key #'length) |
|
2e528066e2fc
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|
1751 (or separator ", "))) |
| 428 | 1752 |
| 1753 (defun where-is (definition &optional insert) | |
| 1754 "Print message listing key sequences that invoke specified command. | |
| 1755 Argument is a command definition, usually a symbol with a function definition. | |
| 1756 When run interactively, it defaults to any function found by | |
| 1757 `function-at-point'. | |
| 1758 If INSERT (the prefix arg) is non-nil, insert the message in the buffer." | |
| 1759 (interactive | |
| 1760 (let ((fn (function-at-point)) | |
| 1761 (enable-recursive-minibuffers t) | |
| 1762 val) | |
| 1763 (setq val (read-command | |
| 1764 (if fn (format "Where is command (default %s): " fn) | |
| 456 | 1765 "Where is command: ") |
| 1766 (and fn (symbol-name fn)))) | |
| 428 | 1767 (list (if (equal (symbol-name val) "") |
| 1768 fn val) | |
| 1769 current-prefix-arg))) | |
| 1770 (let ((keys (where-is-internal definition))) | |
| 1771 (if keys | |
| 1772 (if insert | |
| 1773 (princ (format "%s (%s)" (sorted-key-descriptions keys) | |
| 1774 definition) (current-buffer)) | |
| 1775 (message "%s is on %s" definition (sorted-key-descriptions keys))) | |
| 1776 (if insert | |
| 1777 (princ (format (if (commandp definition) "M-x %s RET" | |
| 1778 "M-: (%s ...)") definition) (current-buffer)) | |
| 1779 (message "%s is not on any keys" definition)))) | |
| 1780 nil) | |
| 1781 | |
| 1782 ;; `locate-library' moved to "packages.el" | |
| 1783 | |
| 1784 | |
| 1785 ;; Functions ported from C into Lisp in XEmacs | |
| 1786 | |
| 1787 (defun describe-syntax () | |
| 1788 "Describe the syntax specifications in the syntax table. | |
| 1789 The descriptions are inserted in a buffer, which is then displayed." | |
| 1790 (interactive) | |
| 1791 (with-displaying-help-buffer | |
| 1792 (lambda () | |
| 1793 ;; defined in syntax.el | |
| 1794 (describe-syntax-table (syntax-table) standard-output)) | |
| 1795 (format "syntax-table for %s" major-mode))) | |
| 1796 | |
| 1797 (defun list-processes () | |
| 1798 "Display a list of all processes. | |
| 1799 \(Any processes listed as Exited or Signaled are actually eliminated | |
| 1800 after the listing is made.)" | |
| 1801 (interactive) | |
| 1802 (with-output-to-temp-buffer "*Process List*" | |
| 1803 (set-buffer standard-output) | |
| 1804 (buffer-disable-undo standard-output) | |
| 1805 (make-local-variable 'truncate-lines) | |
| 1806 (setq truncate-lines t) | |
| 1807 ;; 00000000001111111111222222222233333333334444444444 | |
| 1808 ;; 01234567890123456789012345678901234567890123456789 | |
| 1809 ;; rewritten for I18N3. This one should stay rewritten | |
| 1810 ;; so that the dashes will line up properly. | |
| 1811 (princ "Proc Status Buffer Tty Command\n---- ------ ------ --- -------\n") | |
| 1812 (let ((tail (process-list))) | |
| 1813 (while tail | |
| 1814 (let* ((p (car tail)) | |
| 1815 (pid (process-id p)) | |
| 1816 (s (process-status p))) | |
| 1817 (setq tail (cdr tail)) | |
| 1818 (princ (format "%-13s" (process-name p))) | |
| 1819 (princ s) | |
| 1820 (if (and (eq s 'exit) (/= (process-exit-status p) 0)) | |
| 1821 (princ (format " %d" (process-exit-status p)))) | |
| 1822 (if (memq s '(signal exit closed)) | |
| 1823 ;; Do delete-exited-processes' work | |
| 1824 (delete-process p)) | |
| 1825 (indent-to 22 1) ;#### | |
| 1826 (let ((b (process-buffer p))) | |
| 1827 (cond ((not b) | |
| 1828 (princ "(none)")) | |
| 1829 ((not (buffer-name b)) | |
| 1830 (princ "(killed)")) | |
| 1831 (t | |
| 1832 (princ (buffer-name b))))) | |
| 1833 (indent-to 37 1) ;#### | |
| 1834 (let ((tn (process-tty-name p))) | |
| 1835 (cond ((not tn) | |
| 1836 (princ "(none)")) | |
| 1837 (t | |
| 1838 (princ (format "%s" tn))))) | |
| 1839 (indent-to 49 1) ;#### | |
| 1840 (if (not (integerp pid)) | |
| 1841 (progn | |
| 1842 (princ "network stream connection ") | |
| 1843 (princ (car pid)) | |
| 1844 (princ "@") | |
| 1845 (princ (cdr pid))) | |
| 1846 (let ((cmd (process-command p))) | |
| 1847 (while cmd | |
| 1848 (princ (car cmd)) | |
| 1849 (setq cmd (cdr cmd)) | |
| 1850 (if cmd (princ " "))))) | |
| 1851 (terpri)))))) | |
| 1852 | |
| 440 | 1853 ;; Stop gap for 21.0 until we do help-char etc properly. |
| 428 | 1854 (defun help-keymap-with-help-key (keymap form) |
| 1855 "Return a copy of KEYMAP with an help-key binding according to help-char | |
| 1856 invoking FORM like help-form. An existing binding is not overridden. | |
| 1857 If FORM is nil then no binding is made." | |
| 1858 (let ((map (copy-keymap keymap)) | |
| 1859 (key (if (characterp help-char) | |
| 1860 (vector (character-to-event help-char)) | |
| 1861 help-char))) | |
| 1862 (when (and form key (not (lookup-key map key))) | |
| 1863 (define-key map key | |
| 1864 `(lambda () (interactive) (help-print-help-form ,form)))) | |
| 1865 map)) | |
| 1866 | |
| 1867 (defun help-print-help-form (form) | |
| 1868 (let ((string (eval form))) | |
| 1869 (if (stringp string) | |
| 1870 (with-displaying-help-buffer | |
| 1871 (insert string))))) | |
| 1872 | |
| 3368 | 1873 (defun help-find-source-or-scroll-up (&optional pos) |
| 1874 "Follow any cross reference to source code; if none, scroll up. " | |
| 1875 (interactive "d") | |
| 1876 (let ((e (extent-at pos nil 'find-function-symbol))) | |
|
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1877 (if (and-fboundp 'find-function e) |
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1878 (with-fboundp 'find-function |
| 4103 | 1879 (find-function (extent-property e 'find-function-symbol))) |
| 3368 | 1880 (setq e (extent-at pos nil 'find-variable-symbol)) |
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1881 (if (and-fboundp 'find-variable e) |
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1882 (with-fboundp 'find-variable |
| 4103 | 1883 (find-variable (extent-property e 'find-variable-symbol))) |
| 1884 (scroll-up 1))))) | |
| 3368 | 1885 |
| 1886 (defun help-mouse-find-source-or-track (event) | |
| 1887 "Follow any cross reference to source code under the mouse; | |
| 1888 if none, call mouse-track. " | |
| 1889 (interactive "e") | |
| 1890 (mouse-set-point event) | |
| 1891 (let ((e (extent-at (point) nil 'find-function-symbol))) | |
|
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1892 (if (and-fboundp 'find-function e) |
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1893 (with-fboundp 'find-function |
| 4103 | 1894 (find-function (extent-property e 'find-function-symbol))) |
| 3368 | 1895 (setq e (extent-at (point) nil 'find-variable-symbol)) |
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1896 (if (and-fboundp 'find-variable e) |
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1897 (with-fboundp 'find-variable |
| 4103 | 1898 (find-variable (extent-property e 'find-variable-symbol))) |
| 3368 | 1899 (mouse-track event))))) |
| 1900 | |
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4506
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1901 (define-minor-mode temp-buffer-resize-mode |
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1902 "Toggle the mode which makes windows smaller for temporary buffers. |
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1903 With prefix argument ARG, turn the resizing of windows displaying temporary |
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1904 buffers on if ARG is positive or off otherwise. |
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1905 This makes the window the right height for its contents, but never |
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1906 less than `window-min-height' nor a higher proportion of its frame than |
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1907 `temp-buffer-max-height'. (Note the differing semantics of the latter |
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1908 versus GNU Emacs, where `temp-buffer-max-height' is an integer number of |
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1909 lines.) |
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1910 This applies to `help', `apropos' and `completion' buffers, and some others." |
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1911 :global t :group 'help |
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1912 ;; XEmacs; our implementation of this is very different. |
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1913 (setq temp-buffer-shrink-to-fit temp-buffer-resize-mode)) |
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1914 |
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1915 ;; GNU name for this function. |
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1916 (defalias 'resize-temp-buffer-window 'shrink-window-if-larger-than-buffer) |
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1917 |
| 428 | 1918 ;;; help.el ends here |