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e8af40ee | 1 | ;;; align.el --- align text to a specific column, by regexp |
3c4c8064 | 2 | |
0d30b337 | 3 | ;; Copyright (C) 1999, 2000, 2002, 2003, 2004, |
aaef169d | 4 | ;; 2005, 2006 Free Software Foundation, Inc. |
3c4c8064 GM |
5 | |
6 | ;; Author: John Wiegley <johnw@gnu.org> | |
7 | ;; Keywords: convenience languages lisp | |
3c4c8064 GM |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
086add15 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
3c4c8064 GM |
25 | |
26 | ;;; Commentary: | |
27 | ||
28 | ;; This mode allows you to align regions in a context-sensitive fashion. | |
29 | ;; The classic use is to align assignments: | |
30 | ;; | |
31 | ;; int a = 1; | |
32 | ;; short foo = 2; | |
33 | ;; double blah = 4; | |
34 | ;; | |
35 | ;; becomes | |
36 | ;; | |
37 | ;; int a = 1; | |
38 | ;; short foo = 2; | |
39 | ;; double blah = 4; | |
40 | ||
41 | ;;; Usage: | |
42 | ||
43 | ;; There are several variables which define how certain "categories" | |
44 | ;; of syntax are to be treated. These variables go by the name | |
45 | ;; `align-CATEGORY-modes'. For example, "c++" is such a category. | |
46 | ;; There are several rules which apply to c++, but since several other | |
47 | ;; languages have a syntax similar to c++ (e.g., c, java, etc), these | |
48 | ;; modes are treated as belonging to the same category. | |
49 | ;; | |
50 | ;; If you want to add a new mode under a certain category, just | |
51 | ;; customize that list, or add the new mode manually. For example, to | |
52 | ;; make jde-mode a c++ category mode, use this code in your .emacs | |
53 | ;; file: | |
54 | ;; | |
55 | ;; (setq align-c++-modes (cons 'jde-mode align-c++-modes)) | |
56 | ||
57 | ;; In some programming modes, it's useful to have the aligner run only | |
58 | ;; after indentation is performed. To achieve this, customize or set | |
59 | ;; the variable `align-indent-before-aligning' to t. | |
60 | ||
61 | ;;; Module Authors: | |
62 | ||
63 | ;; In order to incorporate align's functionality into your own | |
64 | ;; modules, there are only a few steps you have to follow. | |
65 | ||
66 | ;; 1. Require or load in the align.el library. | |
67 | ;; | |
68 | ;; 2. Define your alignment and exclusion rules lists, either | |
69 | ;; customizable or not. | |
70 | ;; | |
71 | ;; 3. In your mode function, set the variables | |
72 | ;; `align-mode-rules-list' and `align-mode-exclude-rules-list' | |
73 | ;; to your own rules lists. | |
74 | ||
75 | ;; If there is any need to add your mode name to one of the | |
76 | ;; align-?-modes variables (for example, `align-dq-string-modes'), use | |
77 | ;; `add-to-list', or some similar function which checks first to see | |
78 | ;; if the value is already there. Since the user may customize that | |
79 | ;; mode list, and then write your mode name into their .emacs file, | |
80 | ;; causing the symbol already to be present the next time they load | |
81 | ;; your package. | |
82 | ||
83 | ;; Example: | |
84 | ;; | |
85 | ;; (require 'align) | |
86 | ;; | |
87 | ;; (defcustom my-align-rules-list | |
88 | ;; '((my-rule | |
89 | ;; (regexp . "Sample"))) | |
90 | ;; :type align-rules-list-type | |
91 | ;; :group 'my-package) | |
92 | ;; | |
93 | ;; (put 'my-align-rules-list 'risky-local-variable t) | |
94 | ;; | |
95 | ;; (add-to-list 'align-dq-string-modes 'my-package-mode) | |
96 | ;; (add-to-list 'align-open-comment-modes 'my-package-mode) | |
97 | ;; | |
98 | ;; (defun my-mode () | |
99 | ;; ... | |
100 | ;; (setq align-mode-rules-list my-align-rules-list)) | |
101 | ;; | |
102 | ;; Note that if you need to install your own exclusion rules, then you | |
103 | ;; will also need to reproduce any double-quoted string, or open | |
104 | ;; comment exclusion rules that are defined in the standard | |
105 | ;; `align-exclude-rules-list'. At the moment there is no convenient | |
106 | ;; way to mix both mode-local and global rules lists. | |
107 | ||
108 | ;;; History: | |
109 | ||
110 | ;; Version 1.0 was created in the earlier part of 1996, using a very | |
111 | ;; simple algorithm that understand only basic regular expressions. | |
112 | ;; Parts of the code were broken up and included in vhdl-mode.el | |
113 | ;; around this time. After several comments from users, and a need to | |
114 | ;; find a more robust, performant algorithm, 2.0 was born in late | |
115 | ;; 1998. Many different approaches were taken (mostly due to the | |
116 | ;; complexity of TeX tables), but finally a scheme was discovered | |
117 | ;; which worked fairly well for most common usage cases. Development | |
118 | ;; beyond version 2.8 is not planned, except for problems that users | |
119 | ;; might encounter. | |
120 | ||
121 | ;;; Code: | |
122 | ||
123 | (defgroup align nil | |
124 | "Align text to a specific column, by regexp." | |
165b3a92 | 125 | :version "21.1" |
3c4c8064 GM |
126 | :group 'fill) |
127 | ||
128 | ;;; User Variables: | |
129 | ||
130 | (defcustom align-load-hook nil | |
131 | "*Hook that gets run after the aligner has been loaded." | |
132 | :type 'hook | |
133 | :group 'align) | |
134 | ||
135 | (defcustom align-indent-before-aligning nil | |
136 | "*If non-nil, indent the marked region before aligning it." | |
137 | :type 'boolean | |
138 | :group 'align) | |
139 | ||
140 | (defcustom align-default-spacing 1 | |
141 | "*An integer that represents the default amount of padding to use. | |
142 | If `align-to-tab-stop' is non-nil, this will represent the number of | |
143 | tab stops to use for alignment, rather than the number of spaces. | |
144 | Each alignment rule can optionally override both this variable. See | |
145 | `align-mode-alist'." | |
146 | :type 'integer | |
147 | :group 'align) | |
148 | ||
149 | (defcustom align-to-tab-stop 'indent-tabs-mode | |
150 | "*If non-nil, alignments will always fall on a tab boundary. | |
151 | It may also be a symbol, whose value will be taken." | |
152 | :type '(choice (const nil) symbol) | |
153 | :group 'align) | |
154 | ||
155 | (defcustom align-region-heuristic 500 | |
156 | "*If non-nil, used as a heuristic by `align-current'. | |
157 | Since each alignment rule can possibly have its own set of alignment | |
158 | sections (whenever `align-region-separate' is non-nil, and not a | |
159 | string), this heuristic is used to determine how far before and after | |
160 | point we should search in looking for a region separator. Larger | |
161 | values can mean slower perform in large files, although smaller values | |
162 | may cause unexpected behavior at times." | |
163 | :type 'integer | |
164 | :group 'align) | |
165 | ||
166 | (defcustom align-highlight-change-face 'highlight | |
167 | "*The face to highlight with if changes are necessary." | |
168 | :type 'face | |
169 | :group 'align) | |
170 | ||
171 | (defcustom align-highlight-nochange-face 'secondary-selection | |
172 | "*The face to highlight with if no changes are necessary." | |
173 | :type 'face | |
174 | :group 'align) | |
175 | ||
176 | (defcustom align-large-region 10000 | |
177 | "*If an integer, defines what constitutes a \"large\" region. | |
178 | If nil,then no messages will ever be printed to the minibuffer." | |
179 | :type 'integer | |
180 | :group 'align) | |
181 | ||
182 | (defcustom align-c++-modes '(c++-mode c-mode java-mode) | |
183 | "*A list of modes whose syntax resembles C/C++." | |
184 | :type '(repeat symbol) | |
185 | :group 'align) | |
186 | ||
187 | (defcustom align-perl-modes '(perl-mode cperl-mode) | |
188 | "*A list of modes where perl syntax is to be seen." | |
189 | :type '(repeat symbol) | |
190 | :group 'align) | |
191 | ||
192 | (defcustom align-lisp-modes | |
193 | '(emacs-lisp-mode lisp-interaction-mode lisp-mode scheme-mode) | |
194 | "*A list of modes whose syntax resembles Lisp." | |
195 | :type '(repeat symbol) | |
196 | :group 'align) | |
197 | ||
198 | (defcustom align-tex-modes | |
199 | '(tex-mode plain-tex-mode latex-mode slitex-mode) | |
200 | "*A list of modes whose syntax resembles TeX (and family)." | |
201 | :type '(repeat symbol) | |
202 | :group 'align) | |
203 | ||
204 | (defcustom align-text-modes '(text-mode outline-mode) | |
205 | "*A list of modes whose content is plain text." | |
206 | :type '(repeat symbol) | |
207 | :group 'align) | |
208 | ||
3262f00d GM |
209 | (defcustom align-dq-string-modes |
210 | (append align-lisp-modes align-c++-modes align-perl-modes | |
211 | '(python-mode)) | |
3c4c8064 GM |
212 | "*A list of modes where double quoted strings should be excluded." |
213 | :type '(repeat symbol) | |
214 | :group 'align) | |
215 | ||
3262f00d GM |
216 | (defcustom align-sq-string-modes |
217 | (append align-perl-modes '(python-mode)) | |
3c4c8064 GM |
218 | "*A list of modes where single quoted strings should be excluded." |
219 | :type '(repeat symbol) | |
220 | :group 'align) | |
221 | ||
3262f00d GM |
222 | (defcustom align-open-comment-modes |
223 | (append align-lisp-modes align-c++-modes align-perl-modes | |
224 | '(python-mode makefile-mode)) | |
3c4c8064 GM |
225 | "*A list of modes with a single-line comment syntax. |
226 | These are comments as in Lisp, which have a beginning but, end with | |
227 | the line (i.e., `comment-end' is an empty string)." | |
228 | :type '(repeat symbol) | |
229 | :group 'align) | |
230 | ||
231 | (defcustom align-region-separate "^\\s-*[{}]?\\s-*$" | |
232 | "*Select the method by which alignment sections will be separated. | |
233 | If this is a symbol, that symbol's value will be used. | |
234 | ||
235 | For the sake of clarification, consider the following example, which | |
236 | will be referred to in the descriptions below. | |
237 | ||
238 | int alpha = 1; /* one */ | |
239 | double beta = 2.0; | |
240 | long gamma; /* ten */ | |
241 | ||
242 | unsigned int delta = 1; /* one */ | |
243 | long double epsilon = 3.0; | |
244 | long long omega; /* ten */ | |
245 | ||
246 | The possible settings for `align-region-separate' are: | |
247 | ||
248 | `entire' The entire region being aligned will be considered as a | |
249 | single alignment section. Assuming that comments were not | |
250 | being aligned to a particular column, the example would | |
251 | become: | |
252 | ||
253 | int alpha = 1; /* one */ | |
254 | double beta = 2.0; | |
255 | long gamma; /* ten */ | |
256 | ||
257 | unsigned int delta = 1; /* one */ | |
258 | long double epsilon; | |
259 | long long chi = 10; /* ten */ | |
260 | ||
261 | `group' Each contiguous set of lines where a specific alignment | |
262 | occurs is considered a section for that alignment rule. | |
263 | Note that each rule will may have any entirely different | |
264 | set of section divisions than another. | |
265 | ||
266 | int alpha = 1; /* one */ | |
267 | double beta = 2.0; | |
268 | long gamma; /* ten */ | |
269 | ||
270 | unsigned int delta = 1; /* one */ | |
271 | long double epsilon; | |
272 | long long chi = 10; /* ten */ | |
273 | ||
274 | `largest' When contiguous rule sets overlap, the largest section | |
275 | described will be taken as the alignment section for each | |
276 | rule touched by that section. | |
277 | ||
278 | int alpha = 1; /* one */ | |
279 | double beta = 2.0; | |
280 | long gamma; /* ten */ | |
281 | ||
282 | unsigned int delta = 1; /* one */ | |
283 | long double epsilon; | |
284 | long long chi = 10; /* ten */ | |
285 | ||
286 | NOTE: This option is not supported yet, due to algorithmic | |
287 | issues which haven't been satisfactorily resolved. There | |
288 | are ways to do it, but they're both ugly and resource | |
289 | consumptive. | |
290 | ||
291 | regexp A regular expression string which defines the section | |
292 | divider. If the mode you're in has a consistent divider | |
293 | between sections, the behavior will be very similar to | |
294 | `largest', and faster. But if the mode does not use clear | |
295 | separators (for example, if you collapse your braces onto | |
296 | the preceding statement in C or perl), `largest' is | |
297 | probably the better alternative. | |
298 | ||
299 | function A function that will be passed the beginning and ending | |
300 | locations of the region in which to look for the section | |
301 | separator. At the very beginning of the attempt to align, | |
302 | both of these parameters will be nil, in which case the | |
303 | function should return non-nil if it wants each rule to | |
304 | define its own section, or nil if it wants the largest | |
305 | section found to be used as the common section for all rules | |
306 | that occur there. | |
307 | ||
308 | list A list of markers within the buffer that represent where | |
309 | the section dividers lie. Be certain to use markers! For | |
310 | when the aligning begins, the ensuing contract/expanding of | |
311 | whitespace will throw off any non-marker positions. | |
312 | ||
313 | This method is intended for use in Lisp programs, and not | |
314 | by the user." | |
315 | :type '(choice | |
316 | (const :tag "Entire region is one section" entire) | |
317 | (const :tag "Align by contiguous groups" group) | |
318 | ; (const largest) | |
319 | (regexp :tag "Regexp defines section boundaries") | |
320 | (function :tag "Function defines section boundaries")) | |
321 | :group 'align) | |
322 | ||
323 | (put 'align-region-separate 'risky-local-variable t) | |
324 | ||
325 | (defvar align-rules-list-type | |
326 | '(repeat | |
327 | (cons | |
328 | :tag "Alignment rule" | |
329 | (symbol :tag "Title") | |
330 | (cons :tag "Required attributes" | |
331 | (cons :tag "Regexp" | |
332 | (const :tag "(Regular expression to match)" regexp) | |
333 | (choice :value "\\(\\s-+\\)" regexp function)) | |
334 | (repeat | |
335 | :tag "Optional attributes" | |
336 | (choice | |
337 | (cons :tag "Repeat" | |
338 | (const :tag "(Repeat this rule throughout line)" | |
339 | repeat) | |
340 | (boolean :value t)) | |
341 | (cons :tag "Paren group" | |
342 | (const :tag "(Parenthesis group to use)" group) | |
343 | (choice :value 2 | |
344 | integer (repeat integer))) | |
345 | (cons :tag "Modes" | |
346 | (const :tag "(Modes where this rule applies)" modes) | |
347 | (sexp :value (text-mode))) | |
348 | (cons :tag "Case-fold" | |
349 | (const :tag "(Should case be ignored for this rule)" | |
350 | case-fold) | |
351 | (boolean :value t)) | |
352 | (cons :tag "To Tab Stop" | |
353 | (const :tag "(Should rule align to tab stops)" | |
354 | tab-stop) | |
355 | (boolean :value nil)) | |
356 | (cons :tag "Valid" | |
357 | (const :tag "(Return non-nil if rule is valid)" | |
358 | valid) | |
359 | (function :value t)) | |
360 | (cons :tag "Run If" | |
361 | (const :tag "(Return non-nil if rule should run)" | |
362 | run-if) | |
363 | (function :value t)) | |
364 | (cons :tag "Column" | |
365 | (const :tag "(Column to fix alignment at)" column) | |
366 | (choice :value comment-column | |
367 | integer symbol)) | |
368 | (cons :tag "Spacing" | |
369 | (const :tag "(Amount of spacing to use)" spacing) | |
370 | (integer :value 1)) | |
371 | (cons :tag "Justify" | |
372 | (const :tag "(Should text be right justified)" | |
373 | justify) | |
374 | (boolean :value t)) | |
375 | ;; make sure this stays up-to-date with any changes | |
376 | ;; in `align-region-separate' | |
377 | (cons :tag "Separate" | |
378 | (const :tag "(Separation to use for this rule)" | |
379 | separate) | |
380 | (choice :value "^\\s-*$" | |
381 | (const entire) | |
382 | (const group) | |
383 | ; (const largest) | |
384 | regexp function))))))) | |
385 | "The `type' form for any `align-rules-list' variable.") | |
386 | ||
3c4c8064 GM |
387 | (defcustom align-rules-list |
388 | `((lisp-second-arg | |
389 | (regexp . "\\(^\\s-+[^( \t\n]\\|(\\(\\S-+\\)\\s-+\\)\\S-+\\(\\s-+\\)") | |
390 | (group . 3) | |
391 | (modes . align-lisp-modes) | |
392 | (run-if . ,(function (lambda () current-prefix-arg)))) | |
393 | ||
394 | (lisp-alist-dot | |
395 | (regexp . "\\(\\s-*\\)\\.\\(\\s-*\\)") | |
396 | (group . (1 2)) | |
397 | (modes . align-lisp-modes)) | |
398 | ||
399 | (open-comment | |
400 | (regexp . ,(function | |
401 | (lambda (end reverse) | |
402 | (funcall (if reverse 're-search-backward | |
403 | 're-search-forward) | |
404 | (concat "[^ \t\n\\\\]" | |
405 | (regexp-quote comment-start) | |
406 | "\\(.+\\)$") end t)))) | |
407 | (modes . align-open-comment-modes)) | |
408 | ||
409 | (c-macro-definition | |
410 | (regexp . "^\\s-*#\\s-*define\\s-+\\S-+\\(\\s-+\\)") | |
411 | (modes . align-c++-modes)) | |
412 | ||
413 | (c-variable-declaration | |
414 | (regexp . ,(concat "[*&0-9A-Za-z_]>?[&*]*\\(\\s-+[*&]*\\)" | |
415 | "[A-Za-z_][0-9A-Za-z:_]*\\s-*\\(\\()\\|" | |
416 | "=[^=\n].*\\|(.*)\\|\\(\\[.*\\]\\)*\\)?" | |
417 | "\\s-*[;,]\\|)\\s-*$\\)")) | |
418 | (group . 1) | |
419 | (modes . align-c++-modes) | |
420 | (justify . t) | |
421 | (valid | |
422 | . ,(function | |
423 | (lambda () | |
424 | (not (or (save-excursion | |
425 | (goto-char (match-beginning 1)) | |
426 | (backward-word 1) | |
427 | (looking-at | |
428 | "\\(goto\\|return\\|new\\|delete\\|throw\\)")) | |
429 | (if (and (boundp 'font-lock-mode) font-lock-mode) | |
3262f00d | 430 | (eq (get-text-property (point) 'face) |
3c4c8064 GM |
431 | 'font-lock-comment-face) |
432 | (eq (caar (c-guess-basic-syntax)) 'c)))))))) | |
433 | ||
434 | (c-assignment | |
435 | (regexp . ,(concat "[^-=!^&*+<>/| \t\n]\\(\\s-*[-=!^&*+<>/|]*\\)" | |
436 | "=\\(\\s-*\\)\\([^= \t\n]\\|$\\)")) | |
437 | (group . (1 2)) | |
438 | (modes . align-c++-modes) | |
439 | (justify . t) | |
440 | (tab-stop . nil)) | |
441 | ||
442 | (perl-assignment | |
443 | (regexp . ,(concat "[^=!^&*-+<>/| \t\n]\\(\\s-*\\)=[~>]?" | |
444 | "\\(\\s-*\\)\\([^>= \t\n]\\|$\\)")) | |
445 | (group . (1 2)) | |
446 | (modes . align-perl-modes) | |
447 | (tab-stop . nil)) | |
448 | ||
3262f00d GM |
449 | (python-assignment |
450 | (regexp . ,(concat "[^=!<> \t\n]\\(\\s-*\\)=" | |
451 | "\\(\\s-*\\)\\([^>= \t\n]\\|$\\)")) | |
452 | (group . (1 2)) | |
453 | (modes . '(python-mode)) | |
454 | (tab-stop . nil)) | |
455 | ||
3c4c8064 GM |
456 | (make-assignment |
457 | (regexp . "^\\s-*\\w+\\(\\s-*\\):?=\\(\\s-*\\)\\([^\t\n \\\\]\\|$\\)") | |
458 | (group . (1 2)) | |
459 | (modes . '(makefile-mode)) | |
460 | (tab-stop . nil)) | |
461 | ||
462 | (c-comma-delimiter | |
463 | (regexp . ",\\(\\s-*\\)[^/ \t\n]") | |
464 | (repeat . t) | |
465 | (modes . align-c++-modes) | |
466 | (run-if . ,(function (lambda () current-prefix-arg)))) | |
3ee9f6ac JW |
467 | ; (valid |
468 | ; . ,(function | |
469 | ; (lambda () | |
470 | ; (memq (caar (c-guess-basic-syntax)) | |
471 | ; '(brace-list-intro | |
472 | ; brace-list-entry | |
473 | ; brace-entry-open)))))) | |
3c4c8064 GM |
474 | |
475 | ;; With a prefix argument, comma delimiter will be aligned. Since | |
476 | ;; perl-mode doesn't give us enough syntactic information (and we | |
477 | ;; don't do our own parsing yet), this rule is too destructive to | |
478 | ;; run normally. | |
3262f00d | 479 | (basic-comma-delimiter |
3c4c8064 GM |
480 | (regexp . ",\\(\\s-*\\)[^# \t\n]") |
481 | (repeat . t) | |
3262f00d | 482 | (modes . (append align-perl-modes '(python-mode))) |
3c4c8064 GM |
483 | (run-if . ,(function (lambda () current-prefix-arg)))) |
484 | ||
485 | (c++-comment | |
486 | (regexp . "\\(\\s-*\\)\\(//.*\\|/\\*.*\\*/\\s-*\\)$") | |
487 | (modes . align-c++-modes) | |
488 | (column . comment-column) | |
489 | (valid . ,(function | |
490 | (lambda () | |
491 | (save-excursion | |
492 | (goto-char (match-beginning 1)) | |
493 | (not (bolp))))))) | |
494 | ||
3c4c8064 GM |
495 | (c-chain-logic |
496 | (regexp . "\\(\\s-*\\)\\(&&\\|||\\|\\<and\\>\\|\\<or\\>\\)") | |
497 | (modes . align-c++-modes) | |
498 | (valid . ,(function | |
499 | (lambda () | |
500 | (save-excursion | |
501 | (goto-char (match-end 2)) | |
502 | (looking-at "\\s-*\\(/[*/]\\|$\\)")))))) | |
503 | ||
504 | (perl-chain-logic | |
505 | (regexp . "\\(\\s-*\\)\\(&&\\|||\\|\\<and\\>\\|\\<or\\>\\)") | |
506 | (modes . align-perl-modes) | |
507 | (valid . ,(function | |
508 | (lambda () | |
509 | (save-excursion | |
510 | (goto-char (match-end 2)) | |
511 | (looking-at "\\s-*\\(#\\|$\\)")))))) | |
512 | ||
3262f00d GM |
513 | (python-chain-logic |
514 | (regexp . "\\(\\s-*\\)\\(\\<and\\>\\|\\<or\\>\\)") | |
515 | (modes . '(python-mode)) | |
516 | (valid . ,(function | |
517 | (lambda () | |
518 | (save-excursion | |
519 | (goto-char (match-end 2)) | |
520 | (looking-at "\\s-*\\(#\\|$\\|\\\\\\)")))))) | |
521 | ||
522 | (c-macro-line-continuation | |
523 | (regexp . "\\(\\s-*\\)\\\\$") | |
524 | (modes . align-c++-modes) | |
525 | (column . c-backslash-column)) | |
3ee9f6ac JW |
526 | ; (valid |
527 | ; . ,(function | |
528 | ; (lambda () | |
529 | ; (memq (caar (c-guess-basic-syntax)) | |
530 | ; '(cpp-macro cpp-macro-cont)))))) | |
3262f00d GM |
531 | |
532 | (basic-line-continuation | |
533 | (regexp . "\\(\\s-*\\)\\\\$") | |
534 | (modes . '(python-mode makefile-mode))) | |
535 | ||
3c4c8064 GM |
536 | (tex-record-separator |
537 | (regexp . ,(function | |
538 | (lambda (end reverse) | |
539 | (align-match-tex-pattern "&" end reverse)))) | |
540 | (group . (1 2)) | |
541 | (modes . align-tex-modes) | |
542 | (repeat . t)) | |
543 | ||
544 | (tex-tabbing-separator | |
545 | (regexp . ,(function | |
546 | (lambda (end reverse) | |
547 | (align-match-tex-pattern "\\\\[=>]" end reverse)))) | |
548 | (group . (1 2)) | |
549 | (modes . align-tex-modes) | |
550 | (repeat . t) | |
551 | (run-if . ,(function | |
552 | (lambda () | |
553 | (eq major-mode 'latex-mode))))) | |
554 | ||
555 | (tex-record-break | |
556 | (regexp . "\\(\\s-*\\)\\\\\\\\") | |
557 | (modes . align-tex-modes)) | |
558 | ||
559 | ;; With a numeric prefix argument, or C-u, space delimited text | |
560 | ;; tables will be aligned. | |
561 | (text-column | |
5a8854dd | 562 | (regexp . "\\(^\\|\\S-\\)\\([ \t]+\\)\\(\\S-\\|$\\)") |
3c4c8064 GM |
563 | (group . 2) |
564 | (modes . align-text-modes) | |
565 | (repeat . t) | |
566 | (run-if . ,(function | |
567 | (lambda () | |
568 | (and current-prefix-arg | |
569 | (not (eq '- current-prefix-arg))))))) | |
570 | ||
571 | ;; With a negative prefix argument, lists of dollar figures will | |
572 | ;; be aligned. | |
573 | (text-dollar-figure | |
574 | (regexp . "\\$?\\(\\s-+[0-9]+\\)\\.") | |
575 | (modes . align-text-modes) | |
576 | (justify . t) | |
577 | (run-if . ,(function | |
578 | (lambda () | |
3ee9f6ac JW |
579 | (eq '- current-prefix-arg))))) |
580 | ||
581 | (css-declaration | |
582 | (regexp . "^\\s-*\\w+:\\(\\s-*\\).*;") | |
583 | (group . (1)) | |
584 | (modes . '(css-mode html-mode)))) | |
bb6ee9f3 | 585 | "*A list describing all of the available alignment rules. |
3c4c8064 GM |
586 | The format is: |
587 | ||
588 | ((TITLE | |
589 | (ATTRIBUTE . VALUE) ...) | |
590 | ...) | |
591 | ||
592 | The following attributes are meaningful: | |
593 | ||
594 | `regexp' This required attribute must be either a string describing | |
595 | a regular expression, or a function (described below). | |
596 | For every line within the section that this regular | |
597 | expression matches, the given rule will be applied to that | |
598 | line. The exclusion rules denote which part(s) of the | |
599 | line should not be modified; the alignment rules cause the | |
600 | identified whitespace group to be contracted/expanded such | |
601 | that the \"alignment character\" (the character | |
602 | immediately following the identified parenthesis group), | |
603 | occurs in the same column for every line within the | |
604 | alignment section (see `align-region-separate' for a | |
605 | description of how the region is broken up into alignment | |
606 | sections). | |
607 | ||
608 | The `regexp' attribute describes how the text should be | |
609 | treated. Within this regexp, there must be at least one | |
610 | group of characters (typically whitespace) identified by | |
611 | the special opening and closing parens used in regexp | |
612 | expressions (`\\\\(' and `\\\\)') (see the Emacs manual on | |
613 | the syntax of regular expressions for more info). | |
614 | ||
615 | If `regexp' is a function, it will be called as a | |
616 | replacement for `re-search-forward'. This means that it | |
617 | should return nil if nothing is found to match the rule, | |
618 | or it should set the match data appropriately, move point | |
619 | to the end of the match, and return the value of point. | |
620 | ||
621 | `group' For exclusion rules, the group identifies the range of | |
622 | characters that should be ignored. For alignment rules, | |
623 | these are the characters that will be deleted/expanded for | |
624 | the purposes of alignment. The \"alignment character\" is | |
625 | always the first character immediately following this | |
626 | parenthesis group. This attribute may also be a list of | |
627 | integer, in which case multiple alignment characters will | |
628 | be aligned, with the list of integer identifying the | |
629 | whitespace groups which precede them. The default for | |
630 | this attribute is 1. | |
631 | ||
632 | `modes' The `modes' attribute, if set, should name a list of | |
633 | major modes -- or evaluate to such a value -- in which the | |
634 | rule is valid. If not set, the rule will apply to all | |
635 | modes. | |
636 | ||
637 | `case-fold' If `regexp' is an ordinary regular expression string | |
638 | containing alphabetic character, sometimes you may want | |
639 | the search to proceed case-insensitively (for languages | |
640 | that ignore case, such as pascal for example). In that | |
c0faad25 GM |
641 | case, set `case-fold' to a non-nil value, and the regular |
642 | expression search will ignore case. If `regexp' is set to | |
643 | a function, that function must handle the job of ignoring | |
3c4c8064 GM |
644 | case by itself. |
645 | ||
646 | `tab-stop' If the `tab-stop' attribute is set, and non-nil, the | |
647 | alignment character will always fall on a tab stop | |
648 | (whether it uses tabs to get there or not depends on the | |
649 | value of `indent-tabs-mode'). If the `tab-stop' attribute | |
650 | is set to nil, tab stops will never be used. Otherwise, | |
651 | the value of `align-to-tab-stop' determines whether or not | |
652 | to align to a tab stop. The `tab-stop' attribute may also | |
653 | be a list of t or nil values, corresponding to the number | |
654 | of parenthesis groups specified by the `group' attribute. | |
655 | ||
656 | `repeat' If the `repeat' attribute is present, and non-nil, the | |
657 | rule will be applied to the line continuously until no | |
658 | further matches are found. | |
659 | ||
660 | `valid' If the `valid' attribute is set, it will be used to | |
661 | determine whether the rule should be invoked. This form | |
662 | is evaluated after the regular expression match has been | |
663 | performed, so that it is possible to use the results of | |
664 | that match to determine whether the alignment should be | |
665 | performed. The buffer should not be modified during the | |
666 | evaluation of this form. | |
667 | ||
668 | `run-if' Like `valid', the `run-if' attribute tests whether the | |
669 | rule should be run at all -- even before any searches are | |
670 | done to determine if the rule applies to the alignment | |
671 | region. This can save time, since `run-if' will only be | |
672 | run once for each rule. If it returns nil, the rule will | |
673 | not be attempted. | |
674 | ||
675 | `column' For alignment rules, if the `column' attribute is set -- | |
676 | which must be an integer, or a symbol whose value is an | |
677 | integer -- it will be used as the column in which to align | |
678 | the alignment character. If the text on a particular line | |
679 | happens to overrun that column, a single space character, | |
680 | or tab stop (see `align-to-tab-stop') will be added | |
681 | between the last text character and the alignment | |
682 | character. | |
683 | ||
684 | `spacing' Alignment rules may also override the amount of spacing | |
685 | that would normally be used by providing a `spacing' | |
686 | attribute. This must be an integer, or a list of integers | |
687 | corresponding to the number of parenthesis groups matched | |
688 | by the `group' attribute. If a list of value is used, and | |
689 | any of those values is nil, `align-default-spacing' will | |
690 | be used for that subgroup. See `align-default-spacing' | |
691 | for more details on spacing, tab stops, and how to | |
692 | indicate how much spacing should be used. If TAB-STOP is | |
693 | present, it will override the value of `align-to-tab-stop' | |
694 | for that rule. | |
695 | ||
696 | `justify' It is possible with `regexp' and `group' to identify a | |
697 | character group that contains more than just whitespace | |
698 | characters. By default, any non-whitespace characters in | |
699 | that group will also be deleted while aligning the | |
700 | alignment character. However, if the `justify' attribute | |
701 | is set to a non-nil value, only the initial whitespace | |
702 | characters within that group will be deleted. This has | |
703 | the effect of right-justifying the characters that remain, | |
704 | and can be used for outdenting or just plain old right- | |
705 | justification. | |
706 | ||
707 | `separate' Each rule can define its own section separator, which | |
708 | describes how to identify the separation of \"sections\" | |
709 | within the region to be aligned. Setting the `separate' | |
710 | attribute overrides the value of `align-region-separate' | |
711 | (see the documentation of that variable for possible | |
712 | values), and any separation argument passed to `align'." | |
713 | :type align-rules-list-type | |
714 | :group 'align) | |
715 | ||
716 | (put 'align-rules-list 'risky-local-variable t) | |
717 | ||
718 | (defvar align-exclude-rules-list-type | |
719 | '(repeat | |
720 | (cons | |
721 | :tag "Exclusion rule" | |
722 | (symbol :tag "Title") | |
723 | (cons :tag "Required attributes" | |
724 | (cons :tag "Regexp" | |
725 | (const :tag "(Regular expression to match)" regexp) | |
726 | (choice :value "\\(\\s-+\\)" regexp function)) | |
727 | (repeat | |
728 | :tag "Optional attributes" | |
729 | (choice | |
730 | (cons :tag "Repeat" | |
731 | (const :tag "(Repeat this rule throughout line)" | |
732 | repeat) | |
733 | (boolean :value t)) | |
734 | (cons :tag "Paren group" | |
735 | (const :tag "(Parenthesis group to use)" group) | |
736 | (choice :value 2 | |
737 | integer (repeat integer))) | |
738 | (cons :tag "Modes" | |
739 | (const :tag "(Modes where this rule applies)" modes) | |
740 | (sexp :value (text-mode))) | |
741 | (cons :tag "Case-fold" | |
742 | (const :tag "(Should case be ignored for this rule)" | |
743 | case-fold) | |
744 | (boolean :value t))))))) | |
745 | "The `type' form for any `align-exclude-rules-list' variable.") | |
746 | ||
747 | (defcustom align-exclude-rules-list | |
748 | `((exc-dq-string | |
749 | (regexp . "\"\\([^\"\n]+\\)\"") | |
750 | (repeat . t) | |
751 | (modes . align-dq-string-modes)) | |
752 | ||
753 | (exc-sq-string | |
754 | (regexp . "'\\([^'\n]+\\)'") | |
755 | (repeat . t) | |
756 | (modes . align-sq-string-modes)) | |
757 | ||
758 | (exc-open-comment | |
759 | (regexp | |
760 | . ,(function | |
761 | (lambda (end reverse) | |
762 | (funcall (if reverse 're-search-backward | |
763 | 're-search-forward) | |
764 | (concat "[^ \t\n\\\\]" | |
765 | (regexp-quote comment-start) | |
766 | "\\(.+\\)$") end t)))) | |
767 | (modes . align-open-comment-modes)) | |
768 | ||
769 | (exc-c-comment | |
770 | (regexp . "/\\*\\(.+\\)\\*/") | |
771 | (repeat . t) | |
772 | (modes . align-c++-modes)) | |
773 | ||
774 | (exc-c-func-params | |
775 | (regexp . "(\\([^)\n]+\\))") | |
776 | (repeat . t) | |
777 | (modes . align-c++-modes)) | |
778 | ||
779 | (exc-c-macro | |
780 | (regexp . "^\\s-*#\\s-*\\(if\\w*\\|endif\\)\\(.*\\)$") | |
781 | (group . 2) | |
782 | (modes . align-c++-modes))) | |
bb6ee9f3 | 783 | "*A list describing text that should be excluded from alignment. |
3c4c8064 GM |
784 | See the documentation for `align-rules-list' for more info." |
785 | :type align-exclude-rules-list-type | |
786 | :group 'align) | |
787 | ||
788 | (put 'align-exclude-rules-list 'risky-local-variable t) | |
789 | ||
790 | ;;; Internal Variables: | |
791 | ||
792 | (defvar align-mode-rules-list nil | |
793 | "Alignment rules specific to the current major mode. | |
794 | See the variable `align-rules-list' for more details.") | |
795 | ||
796 | (make-variable-buffer-local 'align-mode-rules-list) | |
797 | ||
798 | (defvar align-mode-exclude-rules-list nil | |
799 | "Alignment exclusion rules specific to the current major mode. | |
800 | See the variable `align-exclude-rules-list' for more details.") | |
801 | ||
802 | (make-variable-buffer-local 'align-mode-exclude-rules-list) | |
803 | ||
804 | (defvar align-highlight-overlays nil | |
805 | "The current overlays highlighting the text matched by a rule.") | |
806 | ||
807 | ;; Sample extension rule set, for vhdl-mode. This should properly be | |
808 | ;; in vhdl-mode.el itself. | |
809 | ||
810 | (defcustom align-vhdl-rules-list | |
811 | `((vhdl-declaration | |
812 | (regexp . "\\(signal\\|variable\\|constant\\)\\(\\s-+\\)\\S-") | |
813 | (group . 2)) | |
814 | ||
815 | (vhdl-case | |
816 | (regexp . "\\(others\\|[^ \t\n=<]\\)\\(\\s-*\\)=>\\(\\s-*\\)\\S-") | |
817 | (group . (2 3)) | |
818 | (valid | |
819 | . ,(function | |
820 | (lambda () | |
821 | (not (string= (downcase (match-string 1)) | |
822 | "others")))))) | |
823 | ||
824 | (vhdl-colon | |
825 | (regexp . "[^ \t\n:]\\(\\s-*\\):\\(\\s-*\\)[^=\n]") | |
826 | (group . (1 2))) | |
827 | ||
828 | (direction | |
829 | (regexp . ":\\s-*\\(in\\|out\\|inout\\|buffer\\)\\(\\s-*\\)") | |
830 | (group . 2)) | |
831 | ||
832 | (sig-assign | |
833 | (regexp . "[^ \t\n=<]\\(\\s-*\\)<=\\(\\s-*\\)\\S-") | |
834 | (group . (1 2))) | |
835 | ||
836 | (var-assign | |
837 | (regexp . "[^ \t\n:]\\(\\s-*\\):=")) | |
838 | ||
839 | (use-entity | |
840 | (regexp . "\\(\\s-+\\)use\\s-+entity"))) | |
841 | "*Alignment rules for `vhdl-mode'. See `align-rules-list' for more info." | |
842 | :type align-rules-list-type | |
843 | :group 'align) | |
844 | ||
845 | (put 'align-vhdl-rules-list 'risky-local-variable t) | |
846 | ||
847 | (defun align-set-vhdl-rules () | |
848 | "Setup the `align-mode-rules-list' variable for `vhdl-mode'." | |
849 | (setq align-mode-rules-list align-vhdl-rules-list)) | |
850 | ||
851 | (add-hook 'vhdl-mode-hook 'align-set-vhdl-rules) | |
852 | ||
853 | (add-to-list 'align-dq-string-modes 'vhdl-mode) | |
854 | (add-to-list 'align-open-comment-modes 'vhdl-mode) | |
855 | ||
856 | ;;; User Functions: | |
857 | ||
858 | ;;;###autoload | |
859 | (defun align (beg end &optional separate rules exclude-rules) | |
860 | "Attempt to align a region based on a set of alignment rules. | |
861 | BEG and END mark the region. If BEG and END are specifically set to | |
862 | nil (this can only be done programmatically), the beginning and end of | |
863 | the current alignment section will be calculated based on the location | |
864 | of point, and the value of `align-region-separate' (or possibly each | |
865 | rule's `separate' attribute). | |
866 | ||
867 | If SEPARATE is non-nil, it overrides the value of | |
868 | `align-region-separate' for all rules, except those that have their | |
869 | `separate' attribute set. | |
870 | ||
871 | RULES and EXCLUDE-RULES, if either is non-nil, will replace the | |
872 | default rule lists defined in `align-rules-list' and | |
873 | `align-exclude-rules-list'. See `align-rules-list' for more details | |
874 | on the format of these lists." | |
875 | (interactive "r") | |
876 | (let ((separator | |
877 | (or separate | |
ca7aae91 JW |
878 | (if (and (symbolp align-region-separate) |
879 | (boundp align-region-separate)) | |
3c4c8064 GM |
880 | (symbol-value align-region-separate) |
881 | align-region-separate) | |
882 | 'entire))) | |
883 | (if (not (or ;(eq separator 'largest) | |
884 | (and (functionp separator) | |
885 | (not (funcall separator nil nil))))) | |
886 | (align-region beg end separator | |
887 | (or rules align-mode-rules-list align-rules-list) | |
888 | (or exclude-rules align-mode-exclude-rules-list | |
889 | align-exclude-rules-list)) | |
890 | (let ((sec-first end) | |
891 | (sec-last beg)) | |
892 | (align-region beg end | |
893 | (or exclude-rules | |
894 | align-mode-exclude-rules-list | |
895 | align-exclude-rules-list) nil | |
896 | separator | |
897 | (function | |
898 | (lambda (b e mode) | |
899 | (when (and mode (listp mode)) | |
900 | (setq sec-first (min sec-first b) | |
901 | sec-last (max sec-last e)))))) | |
902 | (if (< sec-first sec-last) | |
903 | (align-region sec-first sec-last 'entire | |
904 | (or rules align-mode-rules-list align-rules-list) | |
905 | (or exclude-rules align-mode-exclude-rules-list | |
906 | align-exclude-rules-list))))))) | |
907 | ||
908 | ;;;###autoload | |
909 | (defun align-regexp (beg end regexp &optional group spacing repeat) | |
910 | "Align the current region using an ad-hoc rule read from the minibuffer. | |
911 | BEG and END mark the limits of the region. This function will prompt | |
912 | for the REGEXP to align with. If no prefix arg was specified, you | |
913 | only need to supply the characters to be lined up and any preceding | |
914 | whitespace is replaced. If a prefix arg was specified, the full | |
915 | regexp with parenthesized whitespace should be supplied; it will also | |
916 | prompt for which parenthesis GROUP within REGEXP to modify, the amount | |
917 | of SPACING to use, and whether or not to REPEAT the rule throughout | |
918 | the line. See `align-rules-list' for more information about these | |
919 | options. | |
920 | ||
921 | For example, let's say you had a list of phone numbers, and wanted to | |
922 | align them so that the opening parentheses would line up: | |
923 | ||
924 | Fred (123) 456-7890 | |
925 | Alice (123) 456-7890 | |
926 | Mary-Anne (123) 456-7890 | |
927 | Joe (123) 456-7890 | |
928 | ||
929 | There is no predefined rule to handle this, but you could easily do it | |
930 | using a REGEXP like \"(\". All you would have to do is to mark the | |
931 | region, call `align-regexp' and type in that regular expression." | |
932 | (interactive | |
933 | (append | |
cbf08c39 | 934 | (list (region-beginning) (region-end)) |
3c4c8064 GM |
935 | (if current-prefix-arg |
936 | (list (read-string "Complex align using regexp: " | |
937 | "\\(\\s-*\\)") | |
027a4b6b | 938 | (string-to-number |
3c4c8064 GM |
939 | (read-string |
940 | "Parenthesis group to modify (justify if negative): " "1")) | |
027a4b6b | 941 | (string-to-number |
3c4c8064 GM |
942 | (read-string "Amount of spacing (or column if negative): " |
943 | (number-to-string align-default-spacing))) | |
944 | (y-or-n-p "Repeat throughout line? ")) | |
945 | (list (concat "\\(\\s-*\\)" | |
946 | (read-string "Align regexp: ")) | |
947 | 1 align-default-spacing nil)))) | |
948 | (let ((rule | |
949 | (list (list nil (cons 'regexp regexp) | |
950 | (cons 'group (abs group)) | |
951 | (if (< group 0) | |
952 | (cons 'justify t) | |
953 | (cons 'bogus nil)) | |
954 | (if (>= spacing 0) | |
955 | (cons 'spacing spacing) | |
956 | (cons 'column (abs spacing))) | |
957 | (cons 'repeat repeat))))) | |
958 | (align-region beg end 'entire rule nil nil))) | |
959 | ||
960 | ;;;###autoload | |
961 | (defun align-entire (beg end &optional rules exclude-rules) | |
962 | "Align the selected region as if it were one alignment section. | |
963 | BEG and END mark the extent of the region. If RULES or EXCLUDE-RULES | |
964 | is set to a list of rules (see `align-rules-list'), it can be used to | |
965 | override the default alignment rules that would have been used to | |
966 | align that section." | |
967 | (interactive "r") | |
968 | (align beg end 'entire rules exclude-rules)) | |
969 | ||
970 | ;;;###autoload | |
971 | (defun align-current (&optional rules exclude-rules) | |
972 | "Call `align' on the current alignment section. | |
973 | This function assumes you want to align only the current section, and | |
974 | so saves you from having to specify the region. If RULES or | |
975 | EXCLUDE-RULES is set to a list of rules (see `align-rules-list'), it | |
976 | can be used to override the default alignment rules that would have | |
977 | been used to align that section." | |
978 | (interactive) | |
979 | (align nil nil nil rules exclude-rules)) | |
980 | ||
981 | ;;;###autoload | |
982 | (defun align-highlight-rule (beg end title &optional rules exclude-rules) | |
983 | "Highlight the whitespace which a given rule would have modified. | |
984 | BEG and END mark the extent of the region. TITLE identifies the rule | |
985 | that should be highlighted. If RULES or EXCLUDE-RULES is set to a | |
986 | list of rules (see `align-rules-list'), it can be used to override the | |
987 | default alignment rules that would have been used to identify the text | |
988 | to be colored." | |
989 | (interactive | |
cbf08c39 | 990 | (list (region-beginning) (region-end) |
3c4c8064 GM |
991 | (completing-read |
992 | "Title of rule to highlight: " | |
993 | (mapcar | |
994 | (function | |
995 | (lambda (rule) | |
996 | (list (symbol-name (car rule))))) | |
997 | (append (or align-mode-rules-list align-rules-list) | |
998 | (or align-mode-exclude-rules-list | |
999 | align-exclude-rules-list))) nil t))) | |
1000 | (let ((ex-rule (assq (intern title) | |
1001 | (or align-mode-exclude-rules-list | |
1002 | align-exclude-rules-list))) | |
1003 | face) | |
1004 | (align-unhighlight-rule) | |
1005 | (align-region | |
1006 | beg end 'entire | |
1007 | (or rules (if ex-rule | |
1008 | (or exclude-rules align-mode-exclude-rules-list | |
1009 | align-exclude-rules-list) | |
1010 | (or align-mode-rules-list align-rules-list))) | |
1011 | (unless ex-rule (or exclude-rules align-mode-exclude-rules-list | |
1012 | align-exclude-rules-list)) | |
1013 | (function | |
1014 | (lambda (b e mode) | |
1015 | (if (and mode (listp mode)) | |
1016 | (if (equal (symbol-name (car mode)) title) | |
1017 | (setq face (cons align-highlight-change-face | |
1018 | align-highlight-nochange-face)) | |
1019 | (setq face nil)) | |
1020 | (when face | |
1021 | (let ((overlay (make-overlay b e))) | |
1022 | (setq align-highlight-overlays | |
1023 | (cons overlay align-highlight-overlays)) | |
1024 | (overlay-put overlay 'face | |
1025 | (if mode | |
1026 | (car face) | |
1027 | (cdr face))))))))))) | |
1028 | ||
1029 | ;;;###autoload | |
1030 | (defun align-unhighlight-rule () | |
1031 | "Remove any highlighting that was added by `align-highlight-rule'." | |
1032 | (interactive) | |
1033 | (while align-highlight-overlays | |
1034 | (delete-overlay (car align-highlight-overlays)) | |
1035 | (setq align-highlight-overlays | |
1036 | (cdr align-highlight-overlays)))) | |
1037 | ||
6feeb380 JW |
1038 | ;;;###autoload |
1039 | (defun align-newline-and-indent () | |
1040 | "A replacement function for `newline-and-indent', aligning as it goes." | |
1041 | (interactive) | |
ca7aae91 JW |
1042 | (let ((separate (or (if (and (symbolp align-region-separate) |
1043 | (boundp align-region-separate)) | |
6feeb380 JW |
1044 | (symbol-value align-region-separate) |
1045 | align-region-separate) | |
1046 | 'entire)) | |
1047 | (end (point))) | |
1048 | (call-interactively 'newline-and-indent) | |
1049 | (save-excursion | |
1050 | (forward-line -1) | |
1051 | (while (not (or (bobp) | |
1052 | (align-new-section-p (point) end separate))) | |
1053 | (forward-line -1)) | |
1054 | (align (point) end)))) | |
1055 | ||
3c4c8064 GM |
1056 | ;;; Internal Functions: |
1057 | ||
1058 | (defun align-match-tex-pattern (regexp end &optional reverse) | |
1059 | "Match REGEXP in TeX mode, counting backslashes appropriately. | |
1060 | END denotes the end of the region to be searched, while REVERSE, if | |
1061 | non-nil, indicates that the search should proceed backward from the | |
1062 | current position." | |
1063 | (let (result) | |
1064 | (while | |
1065 | (and (setq result | |
1066 | (funcall | |
1067 | (if reverse 're-search-backward | |
1068 | 're-search-forward) | |
1069 | (concat "\\(\\s-*\\)" regexp | |
1070 | "\\(\\s-*\\)") end t)) | |
1071 | (let ((pos (match-end 1)) | |
1072 | (count 0)) | |
1073 | (while (and (> pos (point-min)) | |
1074 | (eq (char-before pos) ?\\)) | |
1075 | (setq count (1+ count) pos (1- pos))) | |
1076 | (eq (mod count 2) 1)) | |
1077 | (goto-char (match-beginning 2)))) | |
1078 | result)) | |
1079 | ||
1080 | (defun align-new-section-p (beg end separator) | |
1081 | "Is there a section divider between BEG and END? | |
1082 | SEPARATOR specifies how to look for the section divider. See the | |
1083 | documentation for `align-region-separate' for more details." | |
1084 | (cond ((or (not separator) | |
1085 | (eq separator 'entire)) | |
1086 | nil) | |
1087 | ((eq separator 'group) | |
1088 | (let ((amount 2)) | |
1089 | (save-excursion | |
1090 | (goto-char end) | |
1091 | (if (bolp) | |
1092 | (setq amount 1))) | |
1093 | (> (count-lines beg end) amount))) | |
1094 | ((stringp separator) | |
1095 | (save-excursion | |
1096 | (goto-char beg) | |
1097 | (re-search-forward separator end t))) | |
1098 | ((functionp separator) | |
1099 | (funcall separator beg end)) | |
1100 | ((listp separator) | |
1101 | (let ((seps separator) yes) | |
1102 | (while seps | |
1103 | (if (and (>= (car seps) beg) | |
1104 | (<= (car seps) end)) | |
1105 | (setq yes t seps nil) | |
1106 | (setq seps (cdr seps)))) | |
1107 | yes)))) | |
1108 | ||
1109 | (defun align-adjust-col-for-rule (column rule spacing tab-stop) | |
1110 | "Adjust COLUMN according to the given RULE. | |
1111 | SPACING specifies how much spacing to use. | |
1112 | TAB-STOP specifies whether SPACING refers to tab-stop boundaries." | |
1113 | (unless spacing | |
1114 | (setq spacing align-default-spacing)) | |
1115 | (if (<= spacing 0) | |
1116 | column | |
1117 | (if (not tab-stop) | |
1118 | (+ column spacing) | |
1119 | (let ((stops tab-stop-list)) | |
1120 | (while stops | |
1121 | (if (and (> (car stops) column) | |
1122 | (= (setq spacing (1- spacing)) 0)) | |
1123 | (setq column (car stops) | |
1124 | stops nil) | |
1125 | (setq stops (cdr stops))))) | |
1126 | column))) | |
1127 | ||
1128 | (defsubst align-column (pos) | |
1129 | "Given a position in the buffer, state what column it's in. | |
1130 | POS is the position whose column will be taken. Note that this | |
1131 | function will change the location of point." | |
1132 | (goto-char pos) | |
1133 | (current-column)) | |
1134 | ||
1135 | (defsubst align-regions (regions props rule func) | |
1136 | "Align the regions specified in REGIONS, a list of cons cells. | |
1137 | PROPS describes formatting features specific to the given regions. | |
1138 | RULE specifies exactly how to perform the alignments. | |
1139 | If FUNC is specified, it will be called with each region that would | |
1140 | have been aligned, rather than modifying the text." | |
1141 | (while regions | |
1142 | (save-excursion | |
1143 | (align-areas (car regions) (car props) rule func)) | |
1144 | (setq regions (cdr regions) | |
1145 | props (cdr props)))) | |
1146 | ||
1147 | (defun align-areas (areas props rule func) | |
1148 | "Given a list of AREAS and formatting PROPS, align according to RULE. | |
1149 | AREAS should be a list of cons cells containing beginning and ending | |
1150 | markers. This function sweeps through all of the beginning markers, | |
1151 | finds out which one starts in the furthermost column, and then deletes | |
1152 | and inserts text such that all of the ending markers occur in the same | |
1153 | column. | |
1154 | ||
1155 | If FUNC is non-nil, it will be called for each text region that would | |
1156 | have been aligned. No changes will be made to the buffer." | |
1157 | (let* ((column (cdr (assq 'column rule))) | |
1158 | (fixed (if (symbolp column) | |
1159 | (symbol-value column) | |
1160 | column)) | |
1161 | (justify (cdr (assq 'justify rule))) | |
1162 | (col (or fixed 0)) | |
1163 | (width 0) | |
1164 | ecol change look) | |
1165 | ||
1166 | ;; Determine the alignment column. | |
1167 | (let ((a areas)) | |
1168 | (while a | |
1169 | (unless fixed | |
1170 | (setq col (max col (align-column (caar a))))) | |
1171 | (unless change | |
1172 | (goto-char (cdar a)) | |
1173 | (if ecol | |
3262f00d | 1174 | (if (/= ecol (current-column)) |
3c4c8064 GM |
1175 | (setq change t)) |
1176 | (setq ecol (current-column)))) | |
1177 | (when justify | |
1178 | (goto-char (caar a)) | |
1179 | (if (and (re-search-forward "\\s-*" (cdar a) t) | |
3262f00d | 1180 | (/= (point) (cdar a))) |
3c4c8064 GM |
1181 | (let ((bcol (current-column))) |
1182 | (setcdr (car a) (cons (point-marker) (cdar a))) | |
1183 | (goto-char (cdr (cdar a))) | |
1184 | (setq width (max width (- (current-column) bcol)))))) | |
1185 | (setq a (cdr a)))) | |
1186 | ||
1187 | (unless fixed | |
1188 | (setq col (+ (align-adjust-col-for-rule | |
1189 | col rule (car props) (cdr props)) width))) | |
1190 | ||
1191 | ;; Make all ending positions to occur in the goal column. Since | |
1192 | ;; the whitespace to be modified was already deleted by | |
1193 | ;; `align-region', all we have to do here is indent. | |
1194 | ||
1195 | (unless change | |
3262f00d | 1196 | (setq change (and ecol (/= col ecol)))) |
3c4c8064 GM |
1197 | |
1198 | (when (or func change) | |
1199 | (while areas | |
1200 | (let ((area (car areas)) | |
1201 | (gocol col) cur) | |
1202 | (when area | |
1203 | (if func | |
1204 | (funcall func (car area) (cdr area) change) | |
1205 | (if (not (and justify | |
1206 | (consp (cdr area)))) | |
1207 | (goto-char (cdr area)) | |
1208 | (goto-char (cddr area)) | |
1209 | (let ((ecol (current-column))) | |
1210 | (goto-char (cadr area)) | |
1211 | (setq gocol (- col (- ecol (current-column)))))) | |
1212 | (setq cur (current-column)) | |
1213 | (cond ((< gocol 0) t) ; don't do anything | |
1214 | ((= cur gocol) t) ; don't need to | |
1215 | ((< cur gocol) ; just add space | |
14e32dd3 EZ |
1216 | ;; FIXME: It is stated above that "...the |
1217 | ;; whitespace to be modified was already | |
1218 | ;; deleted by `align-region', all we have | |
1219 | ;; to do here is indent." However, this | |
1220 | ;; doesn't seem to be true, so we first | |
1221 | ;; delete the whitespace to avoid tabs | |
1222 | ;; after spaces. | |
1223 | (delete-horizontal-space t) | |
3c4c8064 GM |
1224 | (indent-to gocol)) |
1225 | (t | |
1226 | ;; This code works around an oddity in the | |
1227 | ;; FORCE argument of `move-to-column', which | |
1228 | ;; tends to screw up markers if there is any | |
1229 | ;; tabbing. | |
1230 | (let ((endcol (align-column | |
1231 | (if (and justify | |
1232 | (consp (cdr area))) | |
1233 | (cadr area) | |
1234 | (cdr area)))) | |
1235 | (abuts (<= gocol | |
1236 | (align-column (car area))))) | |
1237 | (if abuts | |
1238 | (goto-char (car area)) | |
1239 | (move-to-column gocol t)) | |
1240 | (let ((here (point))) | |
1241 | (move-to-column endcol t) | |
1242 | (delete-region here (point)) | |
1243 | (if abuts | |
1244 | (indent-to (align-adjust-col-for-rule | |
1245 | (current-column) rule | |
1246 | (car props) (cdr props))))))))))) | |
1247 | (setq areas (cdr areas)))))) | |
1248 | ||
1249 | (defun align-region (beg end separate rules exclude-rules | |
1250 | &optional func) | |
1251 | "Align a region based on a given set of alignment rules. | |
1252 | BEG and END specify the region to be aligned. Either may be nil, in | |
1253 | which case the range will stop at the nearest section division (see | |
1254 | `align-region-separate', and `align-region-heuristic' for more | |
1255 | information'). | |
1256 | ||
1257 | The region will be divided into separate alignment sections based on | |
1258 | the value of SEPARATE. | |
1259 | ||
1260 | RULES and EXCLUDE-RULES are a pair of lists describing how to align | |
1261 | the region, and which text areas within it should be excluded from | |
1262 | alignment. See the `align-rules-list' for more information on the | |
1263 | required format of these two lists. | |
1264 | ||
1265 | If FUNC is specified, no text will be modified. What `align-region' | |
1266 | will do with the rules is to search for the alignment areas, as it | |
1267 | regularly would, taking account for exclusions, and then call FUNC, | |
1268 | first with the beginning and ending of the region to be aligned | |
1269 | according to that rule (this can be different for each rule, if BEG | |
1270 | and END were nil), and then with the beginning and ending of each | |
1271 | text region that the rule would have applied to. | |
1272 | ||
1273 | The signature of FUNC should thus be: | |
1274 | ||
1275 | (defun my-align-function (beg end mode) | |
1276 | \"If MODE is a rule (a list), return t if BEG to END are to be searched. | |
1277 | Otherwise BEG to END will be a region of text that matches the rule's | |
1278 | definition, and MODE will be non-nil if any changes are necessary.\" | |
1279 | (unless (and mode (listp mode)) | |
1280 | (message \"Would have aligned from %d to %d...\" beg end))) | |
1281 | ||
1282 | This feature (of passing a FUNC) is used internally to locate the | |
1283 | position of exclusion areas, but could also be used for any other | |
1284 | purpose where you might want to know where the regions that the | |
1285 | aligner would have dealt with are." | |
1286 | (let ((end-mark (and end (copy-marker end t))) | |
1287 | (real-beg beg) | |
1288 | (real-end end) | |
1289 | (report (and (not func) align-large-region beg end | |
1290 | (>= (- end beg) align-large-region))) | |
1291 | (rule-index 1) | |
1292 | (rule-count (length rules))) | |
1293 | (if (and align-indent-before-aligning real-beg end-mark) | |
1294 | (indent-region real-beg end-mark nil)) | |
1295 | (while rules | |
1296 | (let* ((rule (car rules)) | |
1297 | (run-if (assq 'run-if rule)) | |
1298 | (modes (assq 'modes rule))) | |
1299 | ;; unless the `run-if' form tells us not to, look for the | |
1300 | ;; rule.. | |
1301 | (unless (or (and modes (not (memq major-mode | |
1302 | (eval (cdr modes))))) | |
1303 | (and run-if (not (funcall (cdr run-if))))) | |
1304 | (let* ((current-case-fold case-fold-search) | |
1305 | (case-fold (assq 'case-fold rule)) | |
1306 | (regexp (cdr (assq 'regexp rule))) | |
1307 | (regfunc (and (functionp regexp) regexp)) | |
1308 | (rulesep (assq 'separate rule)) | |
1309 | (thissep (if rulesep (cdr rulesep) separate)) | |
1310 | same (eol 0) | |
1311 | group group-c | |
1312 | spacing spacing-c | |
1313 | tab-stop tab-stop-c | |
1314 | repeat repeat-c | |
1315 | valid valid-c | |
1316 | pos-list first | |
1317 | regions index | |
1318 | last-point b e | |
1319 | save-match-data | |
1320 | exclude-p | |
1321 | align-props) | |
1322 | (save-excursion | |
1323 | ;; if beg and end were not given, figure out what the | |
1324 | ;; current alignment region should be. Depending on the | |
1325 | ;; value of `align-region-separate' it's possible for | |
1326 | ;; each rule to have its own definition of what that | |
1327 | ;; current alignment section is. | |
1328 | (if real-beg | |
1329 | (goto-char beg) | |
1330 | (if (or (not thissep) (eq thissep 'entire)) | |
1331 | (error "Cannot determine alignment region for '%s'" | |
1332 | (symbol-name (cdr (assq 'title rule))))) | |
1333 | (beginning-of-line) | |
1334 | (while (and (not (eobp)) | |
1335 | (looking-at "^\\s-*$")) | |
1336 | (forward-line)) | |
1337 | (let* ((here (point)) | |
1338 | (start here)) | |
1339 | (while (and here | |
1340 | (let ((terminus | |
1341 | (and align-region-heuristic | |
1342 | (- (point) | |
1343 | align-region-heuristic)))) | |
1344 | (if regfunc | |
1345 | (funcall regfunc terminus t) | |
1346 | (re-search-backward regexp | |
1347 | terminus t)))) | |
1348 | (if (align-new-section-p (point) here thissep) | |
1349 | (setq beg here | |
1350 | here nil) | |
1351 | (setq here (point)))) | |
1352 | (if (not here) | |
1353 | (goto-char beg)) | |
1354 | (beginning-of-line) | |
1355 | (setq beg (point)) | |
1356 | (goto-char start) | |
1357 | (setq here (point)) | |
1358 | (while (and here | |
1359 | (let ((terminus | |
1360 | (and align-region-heuristic | |
1361 | (+ (point) | |
1362 | align-region-heuristic)))) | |
1363 | (if regfunc | |
1364 | (funcall regfunc terminus nil) | |
1365 | (re-search-forward regexp terminus t)))) | |
1366 | (if (align-new-section-p here (point) thissep) | |
1367 | (setq end here | |
1368 | here nil) | |
1369 | (setq here (point)))) | |
1370 | (if (not here) | |
1371 | (goto-char end)) | |
1372 | (forward-line) | |
1373 | (setq end (point) | |
1374 | end-mark (copy-marker end t)) | |
1375 | (goto-char beg))) | |
1376 | ||
1377 | ;; If we have a region to align, and `func' is set and | |
1378 | ;; reports back that the region is ok, then align it. | |
1379 | (when (or (not func) | |
1380 | (funcall func beg end rule)) | |
1381 | (unwind-protect | |
1382 | (let (exclude-areas) | |
1383 | ;; determine first of all where the exclusions | |
1384 | ;; lie in this region | |
1385 | (when exclude-rules | |
1386 | ;; guard against a problem with recursion and | |
1387 | ;; dynamic binding vs. lexical binding, since | |
1388 | ;; the call to `align-region' below will | |
1389 | ;; re-enter this function, and rebind | |
1390 | ;; `exclude-areas' | |
1391 | (set (setq exclude-areas | |
1392 | (make-symbol "align-exclude-areas")) | |
1393 | nil) | |
1394 | (align-region | |
1395 | beg end 'entire | |
1396 | exclude-rules nil | |
1397 | `(lambda (b e mode) | |
1398 | (or (and mode (listp mode)) | |
1399 | (set (quote ,exclude-areas) | |
1400 | (cons (cons b e) | |
1401 | ,exclude-areas))))) | |
1402 | (setq exclude-areas | |
1403 | (sort (symbol-value exclude-areas) | |
1404 | (function | |
1405 | (lambda (l r) | |
1406 | (>= (car l) (car r))))))) | |
1407 | ||
1408 | ;; set `case-fold-search' according to the | |
1409 | ;; (optional) `case-fold' property | |
1410 | (and case-fold | |
1411 | (setq case-fold-search (cdr case-fold))) | |
1412 | ||
1413 | ;; while we can find the rule in the alignment | |
1414 | ;; region.. | |
1415 | (while (and (< (point) end-mark) | |
1416 | (if regfunc | |
1417 | (funcall regfunc end-mark nil) | |
1418 | (re-search-forward regexp | |
1419 | end-mark t))) | |
1420 | ||
1421 | ;; give the user some indication of where we | |
1422 | ;; are, if it's a very large region being | |
1423 | ;; aligned | |
1424 | (if report | |
a7938b0e RS |
1425 | (let ((symbol (car rule))) |
1426 | (if (and symbol (symbolp symbol)) | |
6feeb380 JW |
1427 | (message |
1428 | "Aligning `%s' (rule %d of %d) %d%%..." | |
39e2c949 | 1429 | (symbol-name symbol) rule-index rule-count |
6feeb380 JW |
1430 | (/ (* (- (point) real-beg) 100) |
1431 | (- end-mark real-beg))) | |
1432 | (message | |
1433 | "Aligning %d%%..." | |
1434 | (/ (* (- (point) real-beg) 100) | |
1435 | (- end-mark real-beg)))))) | |
3c4c8064 GM |
1436 | |
1437 | ;; if the search ended us on the beginning of | |
1438 | ;; the next line, move back to the end of the | |
1439 | ;; previous line. | |
1440 | (if (bolp) | |
1441 | (forward-char -1)) | |
1442 | ||
1443 | ;; lookup the `group' attribute the first time | |
1444 | ;; that we need it | |
1445 | (unless group-c | |
1446 | (setq group (or (cdr (assq 'group rule)) 1)) | |
1447 | (if (listp group) | |
1448 | (setq first (car group)) | |
1449 | (setq first group group (list group))) | |
1450 | (setq group-c t)) | |
1451 | ||
1452 | (unless spacing-c | |
1453 | (setq spacing (cdr (assq 'spacing rule)) | |
1454 | spacing-c t)) | |
1455 | ||
1456 | (unless tab-stop-c | |
1457 | (setq tab-stop | |
1458 | (let ((rule-ts (assq 'tab-stop rule))) | |
1459 | (if rule-ts | |
1460 | (cdr rule-ts) | |
1461 | (if (symbolp align-to-tab-stop) | |
1462 | (symbol-value align-to-tab-stop) | |
1463 | align-to-tab-stop))) | |
1464 | tab-stop-c t)) | |
1465 | ||
1466 | ;; test whether we have found a match on the same | |
1467 | ;; line as a previous match | |
1468 | (if (> (point) eol) | |
1469 | (setq same nil | |
1470 | eol (save-excursion | |
1471 | (end-of-line) | |
1472 | (point-marker)))) | |
1473 | ||
1474 | ;; lookup the `repeat' attribute the first time | |
1475 | (or repeat-c | |
1476 | (setq repeat (cdr (assq 'repeat rule)) | |
1477 | repeat-c t)) | |
1478 | ||
1479 | ;; lookup the `valid' attribute the first time | |
1480 | (or valid-c | |
1481 | (setq valid (assq 'valid rule) | |
1482 | valid-c t)) | |
1483 | ||
1484 | ;; remember the beginning position of this rule | |
1485 | ;; match, and save the match-data, since either | |
1486 | ;; the `valid' form, or the code that searches for | |
1487 | ;; section separation, might alter it | |
1488 | (setq b (match-beginning first) | |
1489 | save-match-data (match-data)) | |
1490 | ||
1491 | ;; unless the `valid' attribute is set, and tells | |
1492 | ;; us that the rule is not valid at this point in | |
1493 | ;; the code.. | |
1494 | (unless (and valid (not (funcall (cdr valid)))) | |
1495 | ||
1496 | ;; look to see if this match begins a new | |
1497 | ;; section. If so, we should align what we've | |
1498 | ;; collected so far, and then begin collecting | |
1499 | ;; anew for the next alignment section | |
1500 | (if (and last-point | |
1501 | (align-new-section-p last-point b | |
1502 | thissep)) | |
1503 | (progn | |
1504 | (align-regions regions align-props | |
1505 | rule func) | |
1506 | (setq last-point (copy-marker b t) | |
1507 | regions nil | |
1508 | align-props nil)) | |
1509 | (setq last-point (copy-marker b t))) | |
1510 | ||
1511 | ;; restore the match data | |
1512 | (set-match-data save-match-data) | |
1513 | ||
1514 | ;; check whether the region to be aligned | |
1515 | ;; straddles an exclusion area | |
1516 | (let ((excls exclude-areas)) | |
1517 | (setq exclude-p nil) | |
1518 | (while excls | |
1519 | (if (and (< (match-beginning (car group)) | |
1520 | (cdar excls)) | |
1521 | (> (match-end (car (last group))) | |
1522 | (caar excls))) | |
1523 | (setq exclude-p t | |
1524 | excls nil) | |
1525 | (setq excls (cdr excls))))) | |
1526 | ||
1527 | ;; go through the list of parenthesis groups | |
1528 | ;; matching whitespace text to be | |
1529 | ;; contracted/expanded (or possibly | |
1530 | ;; justified, if the `justify' attribute was | |
1531 | ;; set) | |
1532 | (unless exclude-p | |
1533 | (let ((g group)) | |
1534 | (while g | |
1535 | ||
1536 | ;; we have to use markers, since | |
1537 | ;; `align-areas' may modify the buffer | |
1538 | (setq b (copy-marker | |
1539 | (match-beginning (car g)) t) | |
1540 | e (copy-marker (match-end (car g)) t)) | |
1541 | ||
1542 | ;; record this text region for alignment | |
1543 | (setq index (if same (1+ index) 0)) | |
1544 | (let ((region (cons b e)) | |
1545 | (props (cons | |
1546 | (if (listp spacing) | |
1547 | (car spacing) | |
1548 | spacing) | |
1549 | (if (listp tab-stop) | |
1550 | (car tab-stop) | |
1551 | tab-stop)))) | |
1552 | (if (nth index regions) | |
1553 | (setcar (nthcdr index regions) | |
1554 | (cons region | |
1555 | (nth index regions))) | |
1556 | (if regions | |
1557 | (progn | |
1558 | (nconc regions | |
1559 | (list (list region))) | |
1560 | (nconc align-props (list props))) | |
1561 | (setq regions | |
1562 | (list (list region))) | |
1563 | (setq align-props (list props))))) | |
1564 | ||
1565 | ;; if any further rule matches are | |
1566 | ;; found before `eol', then they are | |
1567 | ;; on the same line as this one; this | |
1568 | ;; can only happen if the `repeat' | |
1569 | ;; attribute is non-nil | |
1570 | (if (listp spacing) | |
1571 | (setq spacing (cdr spacing))) | |
1572 | (if (listp tab-stop) | |
1573 | (setq tab-stop (cdr tab-stop))) | |
1574 | (setq same t g (cdr g)))) | |
1575 | ||
1576 | ;; if `repeat' has not been set, move to | |
1577 | ;; the next line; don't bother searching | |
1578 | ;; anymore on this one | |
1579 | (if (and (not repeat) (not (bolp))) | |
1580 | (forward-line))))) | |
1581 | ||
1582 | ;; when they are no more matches for this rule, | |
1583 | ;; align whatever was left over | |
1584 | (if regions | |
1585 | (align-regions regions align-props rule func))) | |
1586 | ||
1587 | (setq case-fold-search current-case-fold))))))) | |
1588 | (setq rules (cdr rules) | |
1589 | rule-index (1+ rule-index))) | |
1590 | ||
1591 | (if report | |
1592 | (message "Aligning...done")))) | |
1593 | ||
1594 | ;; Provide: | |
1595 | ||
1596 | (provide 'align) | |
1597 | ||
1598 | (run-hooks 'align-load-hook) | |
1599 | ||
ab5796a9 | 1600 | ;;; arch-tag: ef79cccf-1db8-4888-a8a1-d7ce2d1532f7 |
3c4c8064 | 1601 | ;;; align.el ends here |