Commit | Line | Data |
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55535639 | 1 | ;;; register.el --- register commands for Emacs |
c88ab9ce | 2 | |
acaf905b | 3 | ;; Copyright (C) 1985, 1993-1994, 2001-2012 Free Software Foundation, Inc. |
9750e079 | 4 | |
4821e2af | 5 | ;; Maintainer: FSF |
d7b4d18f | 6 | ;; Keywords: internal |
bd78fa1d | 7 | ;; Package: emacs |
4821e2af | 8 | |
efeae993 RS |
9 | ;; This file is part of GNU Emacs. |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
efeae993 | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
efeae993 RS |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
efeae993 | 23 | |
d9ecc911 ER |
24 | ;;; Commentary: |
25 | ||
26 | ;; This package of functions emulates and somewhat extends the venerable | |
27 | ;; TECO's `register' feature, which permits you to save various useful | |
28 | ;; pieces of buffer state to named variables. The entry points are | |
29 | ;; documented in the Emacs user's manual. | |
30 | ||
f58e0fd5 | 31 | (eval-when-compile (require 'cl-lib)) |
6302e0d3 | 32 | |
4cf1d7e3 CY |
33 | (declare-function semantic-insert-foreign-tag "semantic/tag" (foreign-tag)) |
34 | (declare-function semantic-tag-buffer "semantic/tag" (tag)) | |
35 | (declare-function semantic-tag-start "semantic/tag" (tag)) | |
36 | ||
4821e2af | 37 | ;;; Code: |
efeae993 | 38 | |
f58e0fd5 | 39 | (cl-defstruct |
6302e0d3 LL |
40 | (registerv (:constructor nil) |
41 | (:constructor registerv--make (&optional data print-func | |
42 | jump-func insert-func)) | |
43 | (:copier nil) | |
44 | (:type vector) | |
45 | :named) | |
46 | (data nil :read-only t) | |
47 | (print-func nil :read-only t) | |
48 | (jump-func nil :read-only t) | |
49 | (insert-func nil :read-only t)) | |
50 | ||
f58e0fd5 | 51 | (cl-defun registerv-make (data &key print-func jump-func insert-func) |
6302e0d3 LL |
52 | "Create a register value object. |
53 | ||
54 | DATA can be any value. | |
55 | PRINT-FUNC if provided controls how `list-registers' and | |
56 | `view-register' print the register. It should be a function | |
9173deec | 57 | receiving one argument DATA and print text that completes |
6302e0d3 LL |
58 | this sentence: |
59 | Register X contains [TEXT PRINTED BY PRINT-FUNC] | |
60 | JUMP-FUNC if provided, controls how `jump-to-register' jumps to the register. | |
61 | INSERT-FUNC if provided, controls how `insert-register' insert the register. | |
62 | They both receive DATA as argument." | |
63 | (registerv--make data print-func jump-func insert-func)) | |
64 | ||
efeae993 RS |
65 | (defvar register-alist nil |
66 | "Alist of elements (NAME . CONTENTS), one for each Emacs register. | |
6302e0d3 LL |
67 | NAME is a character (a number). CONTENTS is a string, number, marker, list |
68 | or a struct returned by `registerv-make'. | |
22073dda | 69 | A list of strings represents a rectangle. |
5858bcc4 CY |
70 | A list of the form (file . FILE-NAME) represents the file named FILE-NAME. |
71 | A list of the form (file-query FILE-NAME POSITION) represents | |
72 | position POSITION in the file named FILE-NAME, but query before | |
73 | visiting it. | |
070c2506 KH |
74 | A list of the form (WINDOW-CONFIGURATION POSITION) |
75 | represents a saved window configuration plus a saved value of point. | |
76 | A list of the form (FRAME-CONFIGURATION POSITION) | |
77 | represents a saved frame configuration plus a saved value of point.") | |
efeae993 | 78 | |
1a86cc81 JB |
79 | (defun get-register (register) |
80 | "Return contents of Emacs register named REGISTER, or nil if none." | |
81 | (cdr (assq register register-alist))) | |
efeae993 | 82 | |
1b8cac5d RS |
83 | (defun set-register (register value) |
84 | "Set contents of Emacs register named REGISTER to VALUE. Returns VALUE. | |
1a86cc81 | 85 | See the documentation of the variable `register-alist' for possible VALUEs." |
1b8cac5d | 86 | (let ((aelt (assq register register-alist))) |
efeae993 RS |
87 | (if aelt |
88 | (setcdr aelt value) | |
ddbb3cc7 | 89 | (push (cons register value) register-alist)) |
efeae993 RS |
90 | value)) |
91 | ||
1b8cac5d | 92 | (defun point-to-register (register &optional arg) |
b42e6156 | 93 | "Store current location of point in register REGISTER. |
0cc89026 | 94 | With prefix argument, store current frame configuration. |
b42e6156 | 95 | Use \\[jump-to-register] to go to that location or restore that configuration. |
efeae993 | 96 | Argument is a character, naming the register." |
b42e6156 | 97 | (interactive "cPoint to register: \nP") |
ddbb3cc7 SM |
98 | ;; Turn the marker into a file-ref if the buffer is killed. |
99 | (add-hook 'kill-buffer-hook 'register-swap-out nil t) | |
1b8cac5d | 100 | (set-register register |
070c2506 KH |
101 | (if arg (list (current-frame-configuration) (point-marker)) |
102 | (point-marker)))) | |
efeae993 | 103 | |
06b60517 | 104 | (defun window-configuration-to-register (register &optional _arg) |
83b5d757 RS |
105 | "Store the window configuration of the selected frame in register REGISTER. |
106 | Use \\[jump-to-register] to restore the configuration. | |
107 | Argument is a character, naming the register." | |
5f517806 | 108 | (interactive "cWindow configuration to register: \nP") |
b4a91f43 KH |
109 | ;; current-window-configuration does not include the value |
110 | ;; of point in the current buffer, so record that separately. | |
070c2506 | 111 | (set-register register (list (current-window-configuration) (point-marker)))) |
83b5d757 | 112 | |
06b60517 | 113 | (defun frame-configuration-to-register (register &optional _arg) |
83b5d757 RS |
114 | "Store the window configuration of all frames in register REGISTER. |
115 | Use \\[jump-to-register] to restore the configuration. | |
116 | Argument is a character, naming the register." | |
5f517806 | 117 | (interactive "cFrame configuration to register: \nP") |
b4a91f43 KH |
118 | ;; current-frame-configuration does not include the value |
119 | ;; of point in the current buffer, so record that separately. | |
070c2506 | 120 | (set-register register (list (current-frame-configuration) (point-marker)))) |
83b5d757 | 121 | |
31e1d920 | 122 | (defalias 'register-to-point 'jump-to-register) |
1b8cac5d | 123 | (defun jump-to-register (register &optional delete) |
efeae993 | 124 | "Move point to location stored in a register. |
22073dda | 125 | If the register contains a file name, find that file. |
1a86cc81 | 126 | \(To put a file name in a register, you must use `set-register'.) |
83b5d757 RS |
127 | If the register contains a window configuration (one frame) or a frame |
128 | configuration (all frames), restore that frame or all frames accordingly. | |
e7683fff | 129 | First argument is a character, naming the register. |
1542ad37 RS |
130 | Optional second arg non-nil (interactively, prefix argument) says to |
131 | delete any existing frames that the frame configuration doesn't mention. | |
a21d94f9 | 132 | \(Otherwise, these frames are iconified.)" |
e7683fff | 133 | (interactive "cJump to register: \nP") |
1b8cac5d | 134 | (let ((val (get-register register))) |
376a7584 | 135 | (cond |
6302e0d3 | 136 | ((registerv-p val) |
f58e0fd5 | 137 | (cl-assert (registerv-jump-func val) nil |
6302e0d3 LL |
138 | "Don't know how to jump to register %s" |
139 | (single-key-description register)) | |
140 | (funcall (registerv-jump-func val) (registerv-data val))) | |
b4a91f43 KH |
141 | ((and (consp val) (frame-configuration-p (car val))) |
142 | (set-frame-configuration (car val) (not delete)) | |
143 | (goto-char (cadr val))) | |
144 | ((and (consp val) (window-configuration-p (car val))) | |
145 | (set-window-configuration (car val)) | |
146 | (goto-char (cadr val))) | |
376a7584 | 147 | ((markerp val) |
8c4ca60c KH |
148 | (or (marker-buffer val) |
149 | (error "That register's buffer no longer exists")) | |
376a7584 JB |
150 | (switch-to-buffer (marker-buffer val)) |
151 | (goto-char val)) | |
22073dda RS |
152 | ((and (consp val) (eq (car val) 'file)) |
153 | (find-file (cdr val))) | |
28cbd14d RS |
154 | ((and (consp val) (eq (car val) 'file-query)) |
155 | (or (find-buffer-visiting (nth 1 val)) | |
156 | (y-or-n-p (format "Visit file %s again? " (nth 1 val))) | |
157 | (error "Register access aborted")) | |
158 | (find-file (nth 1 val)) | |
159 | (goto-char (nth 2 val))) | |
4cf1d7e3 CY |
160 | ((and (fboundp 'semantic-foreign-tag-p) |
161 | semantic-mode | |
162 | (semantic-foreign-tag-p val)) | |
163 | (switch-to-buffer (semantic-tag-buffer val)) | |
164 | (goto-char (semantic-tag-start val))) | |
376a7584 JB |
165 | (t |
166 | (error "Register doesn't contain a buffer position or configuration"))))) | |
efeae993 | 167 | |
28cbd14d | 168 | (defun register-swap-out () |
ddbb3cc7 | 169 | "Turn markers into file-query references when a buffer is killed." |
28cbd14d | 170 | (and buffer-file-name |
ddbb3cc7 SM |
171 | (dolist (elem register-alist) |
172 | (and (markerp (cdr elem)) | |
173 | (eq (marker-buffer (cdr elem)) (current-buffer)) | |
174 | (setcdr elem | |
175 | (list 'file-query | |
176 | buffer-file-name | |
177 | (marker-position (cdr elem)))))))) | |
28cbd14d | 178 | |
0e07a458 | 179 | (defun number-to-register (number register) |
070c2506 KH |
180 | "Store a number in a register. |
181 | Two args, NUMBER and REGISTER (a character, naming the register). | |
4d2caa07 KH |
182 | If NUMBER is nil, a decimal number is read from the buffer starting |
183 | at point, and point moves to the end of that number. | |
070c2506 KH |
184 | Interactively, NUMBER is the prefix arg (none means nil)." |
185 | (interactive "P\ncNumber to register: ") | |
4f23d31c | 186 | (set-register register |
0e07a458 KH |
187 | (if number |
188 | (prefix-numeric-value number) | |
4d2caa07 KH |
189 | (if (looking-at "\\s-*-?[0-9]+") |
190 | (progn | |
191 | (goto-char (match-end 0)) | |
fe22eed0 | 192 | (string-to-number (match-string 0))) |
070c2506 KH |
193 | 0)))) |
194 | ||
0e07a458 | 195 | (defun increment-register (number register) |
070c2506 | 196 | "Add NUMBER to the contents of register REGISTER. |
0e07a458 | 197 | Interactively, NUMBER is the prefix arg." |
070c2506 | 198 | (interactive "p\ncIncrement register: ") |
0e07a458 | 199 | (or (numberp (get-register register)) |
070c2506 | 200 | (error "Register does not contain a number")) |
0e07a458 | 201 | (set-register register (+ number (get-register register)))) |
efeae993 | 202 | |
1b8cac5d | 203 | (defun view-register (register) |
efeae993 | 204 | "Display what is contained in register named REGISTER. |
1b8cac5d | 205 | The Lisp value REGISTER is a character." |
efeae993 | 206 | (interactive "cView register: ") |
1b8cac5d | 207 | (let ((val (get-register register))) |
efeae993 | 208 | (if (null val) |
1b8cac5d | 209 | (message "Register %s is empty" (single-key-description register)) |
efeae993 | 210 | (with-output-to-temp-buffer "*Output*" |
92840a31 RS |
211 | (describe-register-1 register t))))) |
212 | ||
213 | (defun list-registers () | |
214 | "Display a list of nonempty registers saying briefly what they contain." | |
215 | (interactive) | |
216 | (let ((list (copy-sequence register-alist))) | |
217 | (setq list (sort list (lambda (a b) (< (car a) (car b))))) | |
218 | (with-output-to-temp-buffer "*Output*" | |
219 | (dolist (elt list) | |
220 | (when (get-register (car elt)) | |
221 | (describe-register-1 (car elt)) | |
222 | (terpri)))))) | |
223 | ||
224 | (defun describe-register-1 (register &optional verbose) | |
225 | (princ "Register ") | |
226 | (princ (single-key-description register)) | |
227 | (princ " contains ") | |
6ed21409 RS |
228 | (let ((val (get-register register))) |
229 | (cond | |
6302e0d3 LL |
230 | ((registerv-p val) |
231 | (if (registerv-print-func val) | |
232 | (funcall (registerv-print-func val) (registerv-data val)) | |
233 | (princ "[UNPRINTABLE CONTENTS]."))) | |
234 | ||
6ed21409 RS |
235 | ((numberp val) |
236 | (princ val)) | |
237 | ||
238 | ((markerp val) | |
239 | (let ((buf (marker-buffer val))) | |
240 | (if (null buf) | |
241 | (princ "a marker in no buffer") | |
242 | (princ "a buffer position:\n buffer ") | |
243 | (princ (buffer-name buf)) | |
244 | (princ ", position ") | |
245 | (princ (marker-position val))))) | |
246 | ||
247 | ((and (consp val) (window-configuration-p (car val))) | |
248 | (princ "a window configuration.")) | |
249 | ||
250 | ((and (consp val) (frame-configuration-p (car val))) | |
251 | (princ "a frame configuration.")) | |
252 | ||
253 | ((and (consp val) (eq (car val) 'file)) | |
254 | (princ "the file ") | |
255 | (prin1 (cdr val)) | |
256 | (princ ".")) | |
257 | ||
258 | ((and (consp val) (eq (car val) 'file-query)) | |
259 | (princ "a file-query reference:\n file ") | |
260 | (prin1 (car (cdr val))) | |
261 | (princ ",\n position ") | |
262 | (princ (car (cdr (cdr val)))) | |
263 | (princ ".")) | |
264 | ||
265 | ((consp val) | |
266 | (if verbose | |
267 | (progn | |
268 | (princ "the rectangle:\n") | |
269 | (while val | |
270 | (princ " ") | |
271 | (princ (car val)) | |
272 | (terpri) | |
273 | (setq val (cdr val)))) | |
274 | (princ "a rectangle starting with ") | |
275 | (princ (car val)))) | |
276 | ||
277 | ((stringp val) | |
9c7cc04b RS |
278 | (if (eq yank-excluded-properties t) |
279 | (set-text-properties 0 (length val) nil val) | |
280 | (remove-list-of-text-properties 0 (length val) | |
281 | yank-excluded-properties val)) | |
6ed21409 RS |
282 | (if verbose |
283 | (progn | |
284 | (princ "the text:\n") | |
285 | (princ val)) | |
f1180544 | 286 | (cond |
13d6f302 RS |
287 | ;; Extract first N characters starting with first non-whitespace. |
288 | ((string-match (format "[^ \t\n].\\{,%d\\}" | |
289 | ;; Deduct 6 for the spaces inserted below. | |
290 | (min 20 (max 0 (- (window-width) 6)))) | |
291 | val) | |
292 | (princ "text starting with\n ") | |
293 | (princ (match-string 0 val))) | |
294 | ((string-match "^[ \t\n]+$" val) | |
295 | (princ "whitespace")) | |
296 | (t | |
297 | (princ "the empty string"))))) | |
6ed21409 RS |
298 | (t |
299 | (princ "Garbage:\n") | |
300 | (if verbose (prin1 val)))))) | |
efeae993 | 301 | |
1b8cac5d RS |
302 | (defun insert-register (register &optional arg) |
303 | "Insert contents of register REGISTER. (REGISTER is a character.) | |
efeae993 RS |
304 | Normally puts point before and mark after the inserted text. |
305 | If optional second arg is non-nil, puts mark before and point after. | |
306 | Interactively, second arg is non-nil if prefix arg is supplied." | |
ecfc7eb3 | 307 | (interactive "*cInsert register: \nP") |
efeae993 | 308 | (push-mark) |
1b8cac5d | 309 | (let ((val (get-register register))) |
cbd4993c | 310 | (cond |
6302e0d3 | 311 | ((registerv-p val) |
f58e0fd5 | 312 | (cl-assert (registerv-insert-func val) nil |
6302e0d3 LL |
313 | "Don't know how to insert register %s" |
314 | (single-key-description register)) | |
315 | (funcall (registerv-insert-func val) (registerv-data val))) | |
2d43b8c9 LL |
316 | ((consp val) |
317 | (insert-rectangle val)) | |
cbd4993c | 318 | ((stringp val) |
e7c765c3 | 319 | (insert-for-yank val)) |
070c2506 | 320 | ((numberp val) |
cbd4993c KH |
321 | (princ val (current-buffer))) |
322 | ((and (markerp val) (marker-position val)) | |
323 | (princ (marker-position val) (current-buffer))) | |
4cf1d7e3 CY |
324 | ((and (fboundp 'semantic-foreign-tag-p) |
325 | semantic-mode | |
326 | (semantic-foreign-tag-p val)) | |
327 | (semantic-insert-foreign-tag val)) | |
cbd4993c KH |
328 | (t |
329 | (error "Register does not contain text")))) | |
efeae993 RS |
330 | (if (not arg) (exchange-point-and-mark))) |
331 | ||
1b8cac5d | 332 | (defun copy-to-register (register start end &optional delete-flag) |
1a86cc81 JB |
333 | "Copy region into register REGISTER. |
334 | With prefix arg, delete as well. | |
1b8cac5d | 335 | Called from program, takes four args: REGISTER, START, END and DELETE-FLAG. |
efeae993 RS |
336 | START and END are buffer positions indicating what to copy." |
337 | (interactive "cCopy to register: \nr\nP") | |
13191e32 | 338 | (set-register register (filter-buffer-substring start end)) |
efeae993 RS |
339 | (if delete-flag (delete-region start end))) |
340 | ||
1b8cac5d RS |
341 | (defun append-to-register (register start end &optional delete-flag) |
342 | "Append region to text in register REGISTER. | |
343 | With prefix arg, delete as well. | |
344 | Called from program, takes four args: REGISTER, START, END and DELETE-FLAG. | |
efeae993 RS |
345 | START and END are buffer positions indicating what to append." |
346 | (interactive "cAppend to register: \nr\nP") | |
c81f72ce TTN |
347 | (let ((reg (get-register register)) |
348 | (text (filter-buffer-substring start end))) | |
349 | (set-register | |
350 | register (cond ((not reg) text) | |
351 | ((stringp reg) (concat reg text)) | |
352 | (t (error "Register does not contain text"))))) | |
efeae993 RS |
353 | (if delete-flag (delete-region start end))) |
354 | ||
1b8cac5d RS |
355 | (defun prepend-to-register (register start end &optional delete-flag) |
356 | "Prepend region to text in register REGISTER. | |
357 | With prefix arg, delete as well. | |
358 | Called from program, takes four args: REGISTER, START, END and DELETE-FLAG. | |
efeae993 RS |
359 | START and END are buffer positions indicating what to prepend." |
360 | (interactive "cPrepend to register: \nr\nP") | |
c81f72ce TTN |
361 | (let ((reg (get-register register)) |
362 | (text (filter-buffer-substring start end))) | |
363 | (set-register | |
364 | register (cond ((not reg) text) | |
365 | ((stringp reg) (concat text reg)) | |
366 | (t (error "Register does not contain text"))))) | |
efeae993 RS |
367 | (if delete-flag (delete-region start end))) |
368 | ||
1b8cac5d RS |
369 | (defun copy-rectangle-to-register (register start end &optional delete-flag) |
370 | "Copy rectangular region into register REGISTER. | |
1a86cc81 JB |
371 | With prefix arg, delete as well. |
372 | To insert this register in the buffer, use \\[insert-register]. | |
5ef5d6ce RS |
373 | |
374 | Called from a program, takes four args: REGISTER, START, END and DELETE-FLAG. | |
efeae993 RS |
375 | START and END are buffer positions giving two corners of rectangle." |
376 | (interactive "cCopy rectangle to register: \nr\nP") | |
1b8cac5d | 377 | (set-register register |
efeae993 RS |
378 | (if delete-flag |
379 | (delete-extract-rectangle start end) | |
380 | (extract-rectangle start end)))) | |
c88ab9ce | 381 | |
0f214cdf | 382 | (provide 'register) |
c88ab9ce | 383 | ;;; register.el ends here |