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785c4478 | 1 | ;;; tempo.el --- Flexible template insertion |
b578f267 | 2 | |
f8c25f1b | 3 | ;; Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
813f532d | 4 | |
8f41fd64 | 5 | ;; Author: David K}gedal <davidk@lysator.liu.se > |
813f532d | 6 | ;; Created: 16 Feb 1994 |
2e792253 | 7 | ;; K}gedal's last version number: 1.2.4 |
813f532d RS |
8 | ;; Keywords: extensions, languages, tools |
9 | ||
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 2, or (at your option) | |
15 | ;; any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
813f532d RS |
26 | |
27 | ;;; Commentary: | |
28 | ||
29 | ;; This file provides a simple way to define powerful templates, or | |
30 | ;; macros, if you wish. It is mainly intended for, but not limited to, | |
31 | ;; other programmers to be used for creating shortcuts for editing | |
32 | ;; certain kind of documents. It was originally written to be used by | |
34da6b16 RS |
33 | ;; a HTML editing mode written by Nelson Minar <nelson@santafe.edu>, |
34 | ;; and his html-helper-mode.el is probably the best example of how to | |
35 | ;; use this program. | |
813f532d RS |
36 | |
37 | ;; A template is defined as a list of items to be inserted in the | |
38 | ;; current buffer at point. Some of the items can be simple strings, | |
39 | ;; while other can control formatting or define special points of | |
40 | ;; interest in the inserted text. | |
41 | ||
42 | ;; If a template defines a "point of interest" that point is inserted | |
43 | ;; in a buffer-local list of "points of interest" that the user can | |
44 | ;; jump between with the commands `tempo-backward-mark' and | |
45 | ;; `tempo-forward-mark'. If the template definer provides a prompt for | |
46 | ;; the point, and the variable `tempo-interactive' is non-nil, the | |
47 | ;; user will be prompted for a string to be inserted in the buffer, | |
48 | ;; using the minibuffer. | |
49 | ||
50 | ;; The template can also define one point to be replaced with the | |
51 | ;; current region if the template command is called with a prefix (or | |
52 | ;; a non-nil argument). | |
53 | ||
54 | ;; More flexible templates can be created by including lisp symbols, | |
55 | ;; which will be evaluated as variables, or lists, which will will be | |
56 | ;; evaluated as lisp expressions. | |
57 | ||
58 | ;; See the documentation for tempo-define-template for the different | |
59 | ;; items that can be used to define a tempo template. | |
60 | ||
61 | ;; One of the more powerful features of tempo templates are automatic | |
62 | ;; completion. With every template can be assigned a special tag that | |
63 | ;; should be recognized by `tempo-complete-tag' and expanded to the | |
64 | ;; complete template. By default the tags are added to a global list | |
65 | ;; of template tags, and are matched against the last word before | |
66 | ;; point. But if you assign your tags to a specific list, you can also | |
67 | ;; specify another method for matching text in the buffer against the | |
68 | ;; tags. In the HTML mode, for instance, the tags are matched against | |
69 | ;; the text between the last `<' and point. | |
70 | ||
71 | ;; When defining a template named `foo', a symbol named | |
72 | ;; `tempo-template-foo' will be created whose value as a variable will | |
73 | ;; be the template definition, and its function value will be an | |
74 | ;; interactive function that inserts the template at the point. | |
75 | ||
813f532d RS |
76 | ;; The latest tempo.el distribution can be fetched from |
77 | ;; ftp.lysator.liu.se in the directory /pub/emacs | |
78 | ||
34059250 RS |
79 | ;; There is also a WWW page at |
80 | ;; http://www.lysator.liu.se/~davidk/elisp/ which has some information | |
81 | ||
785c4478 RS |
82 | ;;; Known bugs: |
83 | ||
84 | ;; If the 'o is the first element in a template, strange things can | |
85 | ;; happen when the template is inserted at the beginning of a | |
86 | ;; line. This is due to strange behaviour in open-line. But it should | |
87 | ;; be easily avoided. | |
88 | ||
89 | ;; The 'o tag is also a problem when including the region. This will | |
90 | ;; be looked into. | |
91 | ||
92 | ;; Clicking mouse-2 in the completion buffer gives strange results. | |
93 | ||
94 | ;; There is a bug in some emacs versions that prevents completion from | |
95 | ;; working. If it doesn't work for you, send me a note indicating your | |
96 | ;; emacs version and your problems. | |
97 | ||
34da6b16 RS |
98 | ;;; Contributors: |
99 | ||
92373b84 | 100 | ;; These people have given me important feedback and new ideas for |
34da6b16 RS |
101 | ;; tempo.el. Thanks. |
102 | ||
103 | ;; Nelson Minar <nelson@santafe.edu> | |
104 | ;; Richard Stallman <rms@gnu.ai.mit.edu> | |
105 | ;; Lars Lindberg <Lars.Lindberg@sypro.cap.se> | |
106 | ;; Glen Whitney <Glen.Whitney@math.lsa.umich.edu> | |
107 | ||
813f532d RS |
108 | ;;; Code: |
109 | ||
785c4478 | 110 | ;; (provide 'tempo) |
813f532d | 111 | |
785c4478 | 112 | ;;; User options |
813f532d | 113 | |
4bef9110 SE |
114 | (defgroup tempo nil |
115 | "Flexible template insertion." | |
116 | :prefix "tempo-" | |
117 | :group 'tools) | |
118 | ||
119 | (defcustom tempo-interactive nil | |
813f532d RS |
120 | "*Prompt user for strings in templates. |
121 | If this variable is non-nil, `tempo-insert' prompts the | |
4bef9110 SE |
122 | user for text to insert in the templates" |
123 | :type 'boolean | |
124 | :group 'tempo) | |
813f532d | 125 | |
4bef9110 | 126 | (defcustom tempo-insert-region nil |
70b5dc25 RS |
127 | "*Automatically insert current region when there is a `r' in the template |
128 | If this variable is NIL, `r' elements will be treated just like `p' | |
129 | elements, unless the template function is given a prefix (or a non-nil | |
785c4478 RS |
130 | argument). If this variable is non-NIL, the behaviour is reversed. |
131 | ||
4bef9110 SE |
132 | In Transient Mark mode, this option is unused." |
133 | :type 'boolean | |
134 | :group 'tempo) | |
70b5dc25 | 135 | |
4bef9110 | 136 | (defcustom tempo-show-completion-buffer t |
70b5dc25 | 137 | "*If non-NIL, show a buffer with possible completions, when only |
4bef9110 SE |
138 | a partial completion can be found" |
139 | :type 'boolean | |
140 | :group 'tempo) | |
70b5dc25 | 141 | |
4bef9110 | 142 | (defcustom tempo-leave-completion-buffer nil |
70b5dc25 | 143 | "*If NIL, a completion buffer generated by \\[tempo-complete-tag] |
4bef9110 SE |
144 | disappears at the next keypress; otherwise, it remains forever." |
145 | :type 'boolean | |
146 | :group 'tempo) | |
70b5dc25 | 147 | |
785c4478 RS |
148 | ;;; Internal variables |
149 | ||
813f532d RS |
150 | (defvar tempo-insert-string-functions nil |
151 | "List of functions to run when inserting a string. | |
34059250 RS |
152 | Each function is called with a single arg, STRING and should return |
153 | another string. This could be used for making all strings upcase by | |
154 | setting it to '(upcase), for example.") | |
813f532d RS |
155 | |
156 | (defvar tempo-tags nil | |
157 | "An association list with tags and corresponding templates") | |
158 | ||
159 | (defvar tempo-local-tags '((tempo-tags . nil)) | |
160 | "A list of locally installed tag completion lists. | |
813f532d | 161 | It is a association list where the car of every element is a symbol |
92373b84 | 162 | whose variable value is a template list. The cdr part, if non-nil, is a |
813f532d RS |
163 | function or a regexp that defines the string to match. See the |
164 | documentation for the function `tempo-complete-tag' for more info. | |
165 | ||
166 | `tempo-tags' is always in the last position in this list.") | |
167 | ||
785c4478 RS |
168 | (defvar tempo-collection nil |
169 | "A collection of all the tags defined for the current buffer.") | |
170 | ||
171 | (defvar tempo-dirty-collection t | |
172 | "Indicates if the tag collection needs to be rebuilt.") | |
173 | ||
813f532d RS |
174 | (defvar tempo-marks nil |
175 | "A list of marks to jump to with `\\[tempo-forward-mark]' and `\\[tempo-backward-mark]'.") | |
176 | ||
785c4478 RS |
177 | (defvar tempo-match-finder "\\b\\([^\\b]+\\)\\=" |
178 | "The regexp or function used to find the string to match against tags. | |
179 | ||
180 | If `tempo-match-finder is a string, it should contain a regular | |
181 | expression with at least one \\( \\) pair. When searching for tags, | |
182 | `tempo-complete-tag' calls `re-search-backward' with this string, and | |
183 | the string between the first \\( and \\) is used for matching against | |
184 | each string in the tag list. If one is found, the whole text between | |
185 | the first \\( and the point is replaced with the inserted template. | |
186 | ||
187 | You will probably want to include \\ \= at the end of the regexp to | |
188 | make sure that the string is matched only against text adjacent to the | |
189 | point. | |
190 | ||
191 | If `tempo-match-finder' is a symbol, it should be a function that | |
192 | returns a pair of the form (STRING . POS), where STRING is the string | |
193 | used for matching and POS is the buffer position after which text | |
194 | should be replaced with a template.") | |
195 | ||
196 | (defvar tempo-user-elements nil | |
197 | "Element handlers for user-defined elements. | |
198 | A list of symbols which are bound to functions that take one argument. | |
92373b84 | 199 | This function should return something to be sent to `tempo-insert' if |
785c4478 | 200 | it recognizes the argument, and NIL otherwise") |
813f532d | 201 | |
70b5dc25 RS |
202 | (defvar tempo-named-insertions nil |
203 | "Temporary storage for named insertions") | |
204 | ||
785c4478 RS |
205 | (defvar tempo-region-start (make-marker) |
206 | "Region start when inserting around the region") | |
207 | ||
208 | (defvar tempo-region-stop (make-marker) | |
209 | "Region stop when inserting around the region") | |
210 | ||
813f532d RS |
211 | ;; Make some variables local to every buffer |
212 | ||
213 | (make-variable-buffer-local 'tempo-marks) | |
214 | (make-variable-buffer-local 'tempo-local-tags) | |
785c4478 RS |
215 | (make-variable-buffer-local 'tempo-match-finder) |
216 | (make-variable-buffer-local 'tempo-collection) | |
217 | (make-variable-buffer-local 'tempo-dirty-collection) | |
813f532d RS |
218 | |
219 | ;;; Functions | |
220 | ||
34da6b16 RS |
221 | ;;; First some useful functions and macros |
222 | ||
223 | (defun tempo-mapc (fun lst) | |
224 | (if (null lst) nil | |
225 | (funcall fun (car lst)) | |
226 | (tempo-mapc fun (cdr lst)))) | |
227 | ||
228 | (defmacro tempo-dolist (il &rest forms) | |
229 | (let ((i (car il)) | |
230 | (l (car (cdr il)))) | |
231 | (list 'tempo-mapc | |
232 | (list 'function (append (list 'lambda | |
7f4d3657 | 233 | (list i)) |
34da6b16 | 234 | forms)) |
7f4d3657 | 235 | l))) |
34da6b16 RS |
236 | (put 'tempo-dolist 'lisp-indent-function 1) |
237 | ||
813f532d RS |
238 | ;; |
239 | ;; tempo-define-template | |
240 | ||
241 | (defun tempo-define-template (name elements &optional tag documentation taglist) | |
242 | "Define a template. | |
243 | This function creates a template variable `tempo-template-NAME' and an | |
244 | interactive function `tempo-template-NAME' that inserts the template | |
245 | at the point. The created function is returned. | |
246 | ||
247 | NAME is a string that contains the name of the template, ELEMENTS is a | |
248 | list of elements in the template, TAG is the tag used for completion, | |
249 | DOCUMENTATION is the documentation string for the insertion command | |
250 | created, and TAGLIST (a symbol) is the tag list that TAG (if provided) | |
251 | should be added to). If TAGLIST is nil and TAG is non-nil, TAG is | |
252 | added to `tempo-tags' | |
253 | ||
254 | The elements in ELEMENTS can be of several types: | |
255 | ||
256 | - A string. It is sent to the hooks in `tempo-insert-string-functions', | |
257 | and the result is inserted. | |
258 | - The symbol 'p. This position is saved in `tempo-marks'. | |
259 | - The symbol 'r. If `tempo-insert' is called with ON-REGION non-nil | |
260 | the current region is placed here. Otherwise it works like 'p. | |
34059250 RS |
261 | - (p PROMPT <NAME> <NOINSERT>) If `tempo-interactive' is non-nil, the |
262 | user is prompted in the minbuffer with PROMPT for a string to be | |
263 | inserted. If the optional parameter NAME is non-nil, the text is | |
264 | saved for later insertion with the `s' tag. If there already is | |
265 | something saved under NAME that value is used instead and no | |
266 | prompting is made. If NOINSERT is provided and non-nil, nothing is | |
267 | inserted, but text is still saved when a NAME is provided. For | |
268 | clarity, the symbol 'noinsert should be used as argument. | |
269 | - (P PROMPT <NAME> <NOINSERT>) Works just like the previous tag, but | |
270 | forces tempo-interactive to be true. | |
271 | - (r PROMPT <NAME> <NOINSERT>) like the previous, but if | |
272 | `tempo-interactive' is nil and `tempo-insert' is called with | |
273 | ON-REGION non-nil, the current region is placed here. This usually | |
274 | happens when you call the template function with a prefix argument. | |
70b5dc25 RS |
275 | - (s NAME) Inserts text previously read with the (p ..) construct. |
276 | Finds the insertion saved under NAME and inserts it. Acts like 'p | |
277 | if tempo-interactive is nil. | |
813f532d RS |
278 | - '& If there is only whitespace between the line start and point, |
279 | nothing happens. Otherwise a newline is inserted. | |
280 | - '% If there is only whitespace between point and end-of-line | |
281 | nothing happens. Otherwise a newline is inserted. | |
282 | - 'n inserts a newline. | |
283 | - '> The line is indented using `indent-according-to-mode'. Note that | |
284 | you often should place this item after the text you want on the | |
285 | line. | |
34059250 | 286 | - 'r> Like r, but it also indents the region. |
785c4478 RS |
287 | - 'n> Inserts a newline and indents line. |
288 | - 'o Like '% but leaves the point before the newline. | |
813f532d | 289 | - nil. It is ignored. |
34059250 RS |
290 | - Anything else. It is evaluated and the result is treated as an |
291 | element to be inserted. One additional tag is useful for these | |
292 | cases. If an expression returns a list '(l foo bar), the elements | |
293 | after 'l will be inserted according to the usual rules. This makes | |
294 | it possible to return several elements from one expression." | |
813f532d RS |
295 | |
296 | (let* ((template-name (intern (concat "tempo-template-" | |
297 | name))) | |
298 | (command-name template-name)) | |
299 | (set template-name elements) | |
300 | (fset command-name (list 'lambda (list '&optional 'arg) | |
301 | (or documentation | |
302 | (concat "Insert a " name ".")) | |
303 | (list 'interactive "*P") | |
304 | (list 'tempo-insert-template (list 'quote | |
70b5dc25 RS |
305 | template-name) |
306 | (list 'if 'tempo-insert-region | |
307 | (list 'not 'arg) 'arg)))) | |
813f532d RS |
308 | (and tag |
309 | (tempo-add-tag tag template-name taglist)) | |
310 | command-name)) | |
311 | ||
312 | ;;; | |
313 | ;;; tempo-insert-template | |
314 | ||
315 | (defun tempo-insert-template (template on-region) | |
316 | "Insert a template. | |
317 | TEMPLATE is the template to be inserted. If ON-REGION is non-nil the | |
785c4478 RS |
318 | `r' elements are replaced with the current region. In Transient Mark |
319 | mode, ON-REGION is ignored and assumed true if the region is active." | |
34059250 RS |
320 | (unwind-protect |
321 | (progn | |
2e792253 | 322 | (if (or (and (boundp 'transient-mark-mode) ; For Emacs |
34059250 RS |
323 | transient-mark-mode |
324 | mark-active) | |
2e792253 | 325 | (and (boundp 'zmacs-regions) ; For XEmacs |
34059250 RS |
326 | zmacs-regions (mark))) |
327 | (setq on-region t)) | |
328 | (and on-region | |
329 | (set-marker tempo-region-start (min (mark) (point))) | |
330 | (set-marker tempo-region-stop (max (mark) (point)))) | |
331 | (if on-region | |
332 | (goto-char tempo-region-start)) | |
333 | (save-excursion | |
334 | (tempo-insert-mark (point-marker)) | |
335 | (mapcar (function (lambda (elt) | |
336 | (tempo-insert elt on-region))) | |
337 | (symbol-value template)) | |
338 | (tempo-insert-mark (point-marker))) | |
339 | (tempo-forward-mark)) | |
340 | (tempo-forget-insertions) | |
341 | ;; Should I check for zmacs here too??? | |
342 | (and (boundp 'transient-mark-mode) | |
343 | transient-mark-mode | |
344 | (deactivate-mark)))) | |
813f532d RS |
345 | |
346 | ;;; | |
347 | ;;; tempo-insert | |
348 | ||
785c4478 | 349 | (defun tempo-insert (element on-region) |
813f532d | 350 | "Insert a template element. |
785c4478 RS |
351 | Insert one element from a template. If ON-REGION is non-nil the `r' |
352 | elements are replaced with the current region. | |
353 | ||
354 | See documentation for `tempo-define-template' for the kind of elements | |
355 | possible." | |
813f532d | 356 | (cond ((stringp element) (tempo-process-and-insert-string element)) |
34059250 RS |
357 | ((and (consp element) |
358 | (eq (car element) 'p)) (tempo-insert-prompt-compat | |
359 | (cdr element))) | |
360 | ((and (consp element) | |
361 | (eq (car element) 'P)) (let ((tempo-interactive t)) | |
362 | (tempo-insert-prompt-compat | |
363 | (cdr element)))) | |
364 | ;;; ((and (consp element) | |
365 | ;;; (eq (car element) 'v)) (tempo-save-named | |
366 | ;;; (nth 1 element) | |
367 | ;;; nil | |
368 | ;;; (nth 2 element))) | |
369 | ((and (consp element) | |
370 | (eq (car element) 'r)) (if on-region | |
371 | (goto-char tempo-region-stop) | |
372 | (tempo-insert-prompt-compat | |
373 | (cdr element)))) | |
374 | ((and (consp element) | |
375 | (eq (car element) 's)) (tempo-insert-named (car (cdr element)))) | |
376 | ((and (consp element) | |
377 | (eq (car element) 'l)) (mapcar (function | |
378 | (lambda (elt) | |
379 | (tempo-insert elt on-region))) | |
380 | (cdr element))) | |
813f532d RS |
381 | ((eq element 'p) (tempo-insert-mark (point-marker))) |
382 | ((eq element 'r) (if on-region | |
785c4478 | 383 | (goto-char tempo-region-stop) |
813f532d | 384 | (tempo-insert-mark (point-marker)))) |
785c4478 RS |
385 | ((eq element 'r>) (if on-region |
386 | (progn | |
387 | (goto-char tempo-region-stop) | |
388 | (indent-region (mark) (point) nil)) | |
389 | (tempo-insert-mark (point-marker)))) | |
813f532d RS |
390 | ((eq element '>) (indent-according-to-mode)) |
391 | ((eq element '&) (if (not (or (= (current-column) 0) | |
392 | (save-excursion | |
393 | (re-search-backward | |
394 | "^\\s-*\\=" nil t)))) | |
395 | (insert "\n"))) | |
396 | ((eq element '%) (if (not (or (eolp) | |
397 | (save-excursion | |
398 | (re-search-forward | |
399 | "\\=\\s-*$" nil t)))) | |
400 | (insert "\n"))) | |
401 | ((eq element 'n) (insert "\n")) | |
402 | ((eq element 'n>) (insert "\n") (indent-according-to-mode)) | |
785c4478 RS |
403 | ;; Bug: If the 'o is the first element in a template, strange |
404 | ;; things can happen when the template is inserted at the | |
405 | ;; beginning of a line. | |
406 | ((eq element 'o) (if (not (or on-region | |
407 | (eolp) | |
408 | (save-excursion | |
409 | (re-search-forward | |
410 | "\\=\\s-*$" nil t)))) | |
411 | (open-line 1))) | |
813f532d | 412 | ((null element)) |
785c4478 RS |
413 | (t (tempo-insert (or (tempo-is-user-element element) |
414 | (eval element)) | |
415 | on-region)))) | |
813f532d RS |
416 | |
417 | ;;; | |
418 | ;;; tempo-insert-prompt | |
419 | ||
34059250 RS |
420 | (defun tempo-insert-prompt-compat (prompt) |
421 | "Compatibility hack for tempo-insert-prompt. | |
422 | PROMPT can be either a prompt string, or a list of arguments to | |
423 | tempo-insert-prompt, or nil." | |
424 | (if (consp prompt) ; not NIL either | |
425 | (apply 'tempo-insert-prompt prompt) | |
426 | (tempo-insert-prompt prompt))) | |
427 | ||
428 | (defun tempo-insert-prompt (prompt &optional save-name no-insert) | |
813f532d RS |
429 | "Prompt for a text string and insert it in the current buffer. |
430 | If the variable `tempo-interactive' is non-nil the user is prompted | |
431 | for a string in the minibuffer, which is then inserted in the current | |
432 | buffer. If `tempo-interactive' is nil, the current point is placed on | |
70b5dc25 | 433 | `tempo-mark'. |
813f532d | 434 | |
34059250 RS |
435 | PROMPT is the prompt string, SAVE-NAME is a name to save the inserted |
436 | text under. If the optional argument NO-INSERT is non-nil, no text i | |
437 | inserted. This can be useful when there is a SAVE-NAME. | |
438 | ||
439 | If there already is a value for SAVE-NAME, it is used and the user is | |
440 | never prompted." | |
441 | (let (insertion | |
442 | (previous (and save-name | |
443 | (tempo-lookup-named save-name)))) | |
444 | (cond | |
445 | ;; Insert previous value, unless no-insert is non-nil | |
446 | ((and previous | |
447 | (not no-insert)) | |
448 | (tempo-insert-named save-name)) ; A double lookup here, but who | |
449 | ; cares | |
450 | ;; If no-insert is non-nil, don't insert the previous value. Just | |
451 | ;; keep it | |
452 | (previous | |
453 | nil) | |
454 | ;; No previous value. Prompt or insert mark | |
455 | (tempo-interactive | |
456 | (if (not (stringp prompt)) | |
457 | (error "tempo: The prompt (%s) is not a string" prompt)) | |
458 | (setq insertion (read-string prompt)) | |
459 | (or no-insert | |
460 | (insert insertion)) | |
461 | (if save-name | |
462 | (tempo-save-named save-name insertion))) | |
463 | (t | |
464 | (tempo-insert-mark (point-marker)))))) | |
813f532d | 465 | |
785c4478 RS |
466 | ;;; |
467 | ;;; tempo-is-user-element | |
468 | ||
469 | (defun tempo-is-user-element (element) | |
470 | "Tries all the user-defined element handlers in | |
471 | `tempo-user-elements'" | |
472 | ;; Sigh... I need (some list) | |
473 | (catch 'found | |
474 | (mapcar (function (lambda (handler) | |
475 | (let ((result (funcall handler element))) | |
476 | (if result (throw 'found result))))) | |
477 | tempo-user-elements) | |
478 | (throw 'found nil))) | |
479 | ||
70b5dc25 RS |
480 | ;;; |
481 | ;;; tempo-forget-insertions | |
482 | ||
483 | (defun tempo-forget-insertions () | |
484 | "Forget all the saved named insertions." | |
485 | (setq tempo-named-insertions nil)) | |
486 | ||
34059250 RS |
487 | ;;; |
488 | ;;; tempo-save-named | |
489 | ||
490 | (defun tempo-save-named (name data) ; Had an optional prompt for 'v | |
491 | "Save some data for later insertion | |
492 | The contents of DATA is saved under the name NAME. | |
493 | ||
494 | The data can later be retrieved with `tempo-lookup-named'. | |
495 | ||
496 | This function returns nil, so it can be used in a template without | |
497 | inserting anything." | |
498 | (setq tempo-named-insertions | |
499 | (cons (cons name data) | |
500 | tempo-named-insertions)) | |
501 | nil) | |
502 | ||
503 | ;;; | |
504 | ;;; tempo-lookup-named | |
505 | ||
506 | (defun tempo-lookup-named (name) | |
507 | "Lookup some saved data under the name NAME. | |
508 | Returns the data if NAME was found, and nil otherwise." | |
509 | (cdr (assq name tempo-named-insertions))) | |
510 | ||
70b5dc25 RS |
511 | ;;; |
512 | ;;; tempo-insert-named | |
513 | ||
34da6b16 RS |
514 | (defun tempo-insert-named (name) |
515 | "Insert the previous insertion saved under a named specified in NAME. | |
34059250 RS |
516 | If there is no such name saved, a tempo mark is inserted. |
517 | ||
518 | Note that if the data is a string, it will not be run through the string | |
519 | processor." | |
520 | (let* ((insertion (tempo-lookup-named name))) | |
521 | (cond ((null insertion) | |
522 | (tempo-insert-mark (point-marker))) | |
523 | ((stringp insertion) | |
524 | (insert insertion)) | |
525 | (t | |
526 | (tempo-insert insertion nil))))) | |
527 | ||
70b5dc25 | 528 | |
813f532d RS |
529 | ;;; |
530 | ;;; tempo-process-and-insert-string | |
531 | ||
532 | (defun tempo-process-and-insert-string (string) | |
533 | "Insert a string from a template. | |
534 | Run a string through the preprocessors in `tempo-insert-string-functions' | |
535 | and insert the results." | |
813f532d RS |
536 | (cond ((null tempo-insert-string-functions) |
537 | nil) | |
538 | ((symbolp tempo-insert-string-functions) | |
539 | (setq string | |
34da6b16 | 540 | (funcall tempo-insert-string-functions string))) |
813f532d | 541 | ((listp tempo-insert-string-functions) |
34da6b16 RS |
542 | (tempo-dolist (fn tempo-insert-string-functions) |
543 | (setq string (funcall fn string)))) | |
813f532d RS |
544 | (t |
545 | (error "Bogus value in tempo-insert-string-functions: %s" | |
546 | tempo-insert-string-functions))) | |
547 | (insert string)) | |
548 | ||
549 | ;;; | |
550 | ;;; tempo-insert-mark | |
551 | ||
552 | (defun tempo-insert-mark (mark) | |
553 | "Insert a mark `tempo-marks' while keeping it sorted" | |
554 | (cond ((null tempo-marks) (setq tempo-marks (list mark))) | |
555 | ((< mark (car tempo-marks)) (setq tempo-marks (cons mark tempo-marks))) | |
556 | (t (let ((lp tempo-marks)) | |
557 | (while (and (cdr lp) | |
558 | (<= (car (cdr lp)) mark)) | |
559 | (setq lp (cdr lp))) | |
560 | (if (not (= mark (car lp))) | |
561 | (setcdr lp (cons mark (cdr lp)))))))) | |
562 | ||
563 | ;;; | |
564 | ;;; tempo-forward-mark | |
565 | ||
566 | (defun tempo-forward-mark () | |
567 | "Jump to the next mark in `tempo-forward-mark-list'." | |
568 | (interactive) | |
569 | (let ((next-mark (catch 'found | |
570 | (mapcar | |
571 | (function | |
572 | (lambda (mark) | |
573 | (if (< (point) mark) | |
574 | (throw 'found mark)))) | |
575 | tempo-marks) | |
576 | ;; return nil if not found | |
577 | nil))) | |
578 | (if next-mark | |
579 | (goto-char next-mark)))) | |
580 | ||
581 | ;;; | |
582 | ;;; tempo-backward-mark | |
583 | ||
584 | (defun tempo-backward-mark () | |
585 | "Jump to the previous mark in `tempo-back-mark-list'." | |
586 | (interactive) | |
587 | (let ((prev-mark (catch 'found | |
588 | (let (last) | |
589 | (mapcar | |
590 | (function | |
591 | (lambda (mark) | |
592 | (if (<= (point) mark) | |
593 | (throw 'found last)) | |
594 | (setq last mark))) | |
595 | tempo-marks) | |
596 | last)))) | |
597 | (if prev-mark | |
598 | (goto-char prev-mark)))) | |
599 | ||
600 | ;;; | |
601 | ;;; tempo-add-tag | |
602 | ||
603 | (defun tempo-add-tag (tag template &optional tag-list) | |
604 | "Add a template tag. | |
813f532d RS |
605 | Add the TAG, that should complete to TEMPLATE to the list in TAG-LIST, |
606 | or to `tempo-tags' if TAG-LIST is nil." | |
607 | ||
608 | (interactive "sTag: \nCTemplate: ") | |
609 | (if (null tag-list) | |
610 | (setq tag-list 'tempo-tags)) | |
611 | (if (not (assoc tag (symbol-value tag-list))) | |
785c4478 RS |
612 | (set tag-list (cons (cons tag template) (symbol-value tag-list)))) |
613 | (tempo-invalidate-collection)) | |
813f532d RS |
614 | |
615 | ;;; | |
616 | ;;; tempo-use-tag-list | |
617 | ||
618 | (defun tempo-use-tag-list (tag-list &optional completion-function) | |
619 | "Install TAG-LIST to be used for template completion in the current buffer. | |
813f532d | 620 | TAG-LIST is a symbol whose variable value is a tag list created with |
785c4478 | 621 | `tempo-add-tag'. |
813f532d | 622 | |
92373b84 | 623 | COMPLETION-FUNCTION is an obsolete option for specifying an optional |
785c4478 RS |
624 | function or string that is used by `\\[tempo-complete-tag]' to find a |
625 | string to match the tag against. It has the same definition as the | |
626 | variable `tempo-match-finder'. In this version, supplying a | |
627 | COMPLETION-FUNCTION just sets `tempo-match-finder' locally." | |
813f532d RS |
628 | (let ((old (assq tag-list tempo-local-tags))) |
629 | (if old | |
630 | (setcdr old completion-function) | |
631 | (setq tempo-local-tags (cons (cons tag-list completion-function) | |
785c4478 RS |
632 | tempo-local-tags)))) |
633 | (if completion-function | |
634 | (setq tempo-match-finder completion-function)) | |
635 | (tempo-invalidate-collection)) | |
636 | ||
637 | ;;; | |
638 | ;;; tempo-invalidate-collection | |
639 | ||
640 | (defun tempo-invalidate-collection () | |
641 | "Marks the tag collection as obsolete. | |
642 | Whenever it is needed again it will be rebuilt." | |
643 | (setq tempo-dirty-collection t)) | |
644 | ||
645 | ;;; | |
646 | ;;; tempo-build-collection | |
647 | ||
648 | (defun tempo-build-collection () | |
649 | "Build a collection of all the tags and return it. | |
650 | If `tempo-dirty-collection' is NIL, the old collection is reused." | |
35622e5f KH |
651 | (prog1 |
652 | (or (and (not tempo-dirty-collection) | |
653 | tempo-collection) | |
654 | (setq tempo-collection | |
655 | (apply (function append) | |
656 | (mapcar (function (lambda (tag-list) | |
785c4478 RS |
657 | ; If the format for |
658 | ; tempo-local-tags changes, | |
659 | ; change this | |
35622e5f KH |
660 | (eval (car tag-list)))) |
661 | tempo-local-tags)))) | |
662 | (setq tempo-dirty-collection nil))) | |
813f532d RS |
663 | |
664 | ;;; | |
665 | ;;; tempo-find-match-string | |
666 | ||
667 | (defun tempo-find-match-string (finder) | |
668 | "Find a string to be matched against a tag list. | |
34da6b16 RS |
669 | FINDER is a function or a string. Returns (STRING . POS), or nil |
670 | if no reasonable string is found." | |
813f532d | 671 | (cond ((stringp finder) |
34da6b16 RS |
672 | (let (successful) |
673 | (save-excursion | |
674 | (or (setq successful (re-search-backward finder nil t)) | |
675 | 0)) | |
676 | (if successful | |
677 | (cons (buffer-substring (match-beginning 1) | |
678 | (match-end 1)) ; This seems to be a | |
679 | ; bug in emacs | |
680 | (match-beginning 1)) | |
681 | nil))) | |
813f532d RS |
682 | (t |
683 | (funcall finder)))) | |
684 | ||
685 | ;;; | |
686 | ;;; tempo-complete-tag | |
687 | ||
688 | (defun tempo-complete-tag (&optional silent) | |
70b5dc25 | 689 | "Look for a tag and expand it. |
34da6b16 | 690 | All the tags in the tag lists in `tempo-local-tags' |
35622e5f | 691 | \(this includes `tempo-tags') are searched for a match for the text |
34da6b16 RS |
692 | before the point. The way the string to match for is determined can |
693 | be altered with the variable `tempo-match-finder'. If | |
694 | `tempo-match-finder' returns nil, then the results are the same as | |
695 | no match at all. | |
785c4478 RS |
696 | |
697 | If a single match is found, the corresponding template is expanded in | |
698 | place of the matching string. | |
699 | ||
700 | If a partial completion or no match at all is found, and SILENT is | |
701 | non-NIL, the function will give a signal. | |
702 | ||
703 | If a partial completion is found and `tempo-show-completion-buffer' is | |
704 | non-NIL, a buffer containing possible completions is displayed." | |
705 | ||
706 | ;; This function may look like a hack, but this is how I want it to | |
707 | ;; work. | |
708 | (interactive "*") | |
709 | (let* ((collection (tempo-build-collection)) | |
710 | (match-info (tempo-find-match-string tempo-match-finder)) | |
711 | (match-string (car match-info)) | |
712 | (match-start (cdr match-info)) | |
713 | (exact (assoc match-string collection)) | |
714 | (compl (or (car exact) | |
34da6b16 | 715 | (and match-info (try-completion match-string collection))))) |
785c4478 | 716 | (if compl (delete-region match-start (point))) |
34da6b16 RS |
717 | (cond ((null match-info) (or silent (ding))) |
718 | ((null compl) (or silent (ding))) | |
785c4478 RS |
719 | ((eq compl t) (tempo-insert-template |
720 | (cdr (assoc match-string | |
721 | collection)) | |
722 | nil)) | |
723 | (t (if (setq exact (assoc compl collection)) | |
724 | (tempo-insert-template (cdr exact) nil) | |
725 | (insert compl) | |
726 | (or silent (ding)) | |
727 | (if tempo-show-completion-buffer | |
728 | (tempo-display-completions match-string | |
729 | collection))))))) | |
813f532d | 730 | |
813f532d | 731 | |
70b5dc25 RS |
732 | ;;; |
733 | ;;; tempo-display-completions | |
734 | ||
735 | (defun tempo-display-completions (string tag-list) | |
736 | "Show a buffer containing possible completions for STRING." | |
737 | (if tempo-leave-completion-buffer | |
738 | (with-output-to-temp-buffer "*Completions*" | |
739 | (display-completion-list | |
740 | (all-completions string tag-list))) | |
741 | (save-window-excursion | |
742 | (with-output-to-temp-buffer "*Completions*" | |
743 | (display-completion-list | |
744 | (all-completions string tag-list))) | |
745 | (sit-for 32767)))) | |
746 | ||
34da6b16 RS |
747 | ;;; |
748 | ;;; tempo-expand-if-complete | |
749 | ||
750 | (defun tempo-expand-if-complete () | |
751 | "Expand the tag before point if it is complete. | |
752 | Returns non-nil if an expansion was made and nil otherwise. | |
753 | ||
754 | This could as an example be used in a command that is bound to the | |
755 | space bar, and looks something like this: | |
756 | ||
757 | (defun tempo-space () | |
758 | (interactive \"*\") | |
759 | (or (tempo-expand-if-complete) | |
760 | (insert \" \")))" | |
761 | ||
762 | (interactive "*") | |
763 | (let* ((collection (tempo-build-collection)) | |
764 | (match-info (tempo-find-match-string tempo-match-finder)) | |
765 | (match-string (car match-info)) | |
766 | (match-start (cdr match-info)) | |
767 | (exact (assoc match-string collection))) | |
768 | (if exact | |
769 | (progn | |
770 | (delete-region match-start (point)) | |
771 | (tempo-insert-template (cdr exact) nil) | |
772 | t) | |
773 | nil))) | |
774 | ||
785c4478 RS |
775 | (provide 'tempo) |
776 | ||
813f532d | 777 | ;;; tempo.el ends here |