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1 | ;; Perl code editing commands for GNU Emacs |
2 | ;; Copyright (C) 1990 William F. Mann |
3 | ;; Adapted from C code editing commands 'c-mode.el', Copyright 1987 by the |
4 | ;; Free Software Foundation, under terms of its General Public License. |
5 | |
6 | ;; This file may be made part of GNU Emacs at the option of the FSF, or |
7 | ;; of the perl distribution at the option of Larry Wall. |
8 | |
9 | ;; This code is distributed in the hope that it will be useful, |
10 | ;; but WITHOUT ANY WARRANTY. No author or distributor |
11 | ;; accepts responsibility to anyone for the consequences of using it |
12 | ;; or for whether it serves any particular purpose or works at all, |
13 | ;; unless he says so in writing. Refer to the GNU Emacs General Public |
14 | ;; License for full details. |
15 | |
16 | ;; Everyone is granted permission to copy, modify and redistribute |
17 | ;; this code, but only under the conditions described in the |
18 | ;; GNU Emacs General Public License. A copy of this license is |
19 | ;; supposed to have been given to you along with GNU Emacs so you |
20 | ;; can know your rights and responsibilities. It should be in a |
21 | ;; file named COPYING. Among other things, the copyright notice |
22 | ;; and this notice must be preserved on all copies. |
23 | |
24 | ;; To enter perl-mode automatically, add (autoload 'perl-mode "perl-mode") |
25 | ;; to your .emacs file and change the first line of your perl script to: |
26 | ;; #!/usr/bin/perl -- # -*-Perl-*- |
27 | ;; With argments to perl: |
28 | ;; #!/usr/bin/perl -P- # -*-Perl-*- |
29 | ;; To handle files included with do 'filename.pl';, add something like |
30 | ;; (setq auto-mode-alist (append (list (cons "\\.pl$" 'perl-mode)) |
31 | ;; auto-mode-alist)) |
32 | ;; to your .emacs file; otherwise the .pl suffix defaults to prolog-mode. |
33 | |
34 | ;; This code is based on the 18.53 version c-mode.el, with extensive |
35 | ;; rewriting. Most of the features of c-mode survived intact. |
36 | |
37 | ;; I added a new feature which adds functionality to TAB; it is controlled |
38 | ;; by the variable perl-tab-to-comment. With it enabled, TAB does the |
39 | ;; first thing it can from the following list: change the indentation; |
40 | ;; move past leading white space; delete an empty comment; reindent a |
41 | ;; comment; move to end of line; create an empty comment; tell you that |
42 | ;; the line ends in a quoted string, or has a # which should be a \#. |
43 | |
44 | ;; If your machine is slow, you may want to remove some of the bindings |
45 | ;; to electric-perl-terminator. I changed the indenting defaults to be |
46 | ;; what Larry Wall uses in perl/lib, but left in all the options. |
47 | |
48 | ;; I also tuned a few things: comments and labels starting in column |
49 | ;; zero are left there by indent-perl-exp; perl-beginning-of-function |
50 | ;; goes back to the first open brace/paren in column zero, the open brace |
51 | ;; in 'sub ... {', or the equal sign in 'format ... ='; indent-perl-exp |
52 | ;; (meta-^q) indents from the current line through the close of the next |
53 | ;; brace/paren, so you don't need to start exactly at a brace or paren. |
54 | |
55 | ;; It may be good style to put a set of redundant braces around your |
56 | ;; main program. This will let you reindent it with meta-^q. |
57 | |
58 | ;; Known problems (these are all caused by limitations in the elisp |
59 | ;; parsing routine (parse-partial-sexp), which was not designed for such |
60 | ;; a rich language; writing a more suitable parser would be a big job): |
61 | ;; 1) Regular expression delimitors do not act as quotes, so special |
62 | ;; characters such as `'"#:;[](){} may need to be backslashed |
63 | ;; in regular expressions and in both parts of s/// and tr///. |
64 | ;; 2) The globbing syntax <pattern> is not recognized, so special |
65 | ;; characters in the pattern string must be backslashed. |
66 | ;; 3) The q, qq, and << quoting operators are not recognized; see below. |
67 | ;; 4) \ (backslash) always quotes the next character, so '\' is |
68 | ;; treated as the start of a string. Use "\\" as a work-around. |
69 | ;; 5) To make variables such a $' and $#array work, perl-mode treats |
70 | ;; $ just like backslash, so '$' is the same as problem 5. |
71 | ;; 6) Unfortunately, treating $ like \ makes ${var} be treated as an |
72 | ;; unmatched }. See below. |
73 | ;; 7) When ' (quote) is used as a package name separator, perl-mode |
74 | ;; doesn't understand, and thinks it is seeing a quoted string. |
75 | |
76 | ;; Here are some ugly tricks to bypass some of these problems: the perl |
77 | ;; expression /`/ (that's a back-tick) usually evaluates harmlessly, |
78 | ;; but will trick perl-mode into starting a quoted string, which |
79 | ;; can be ended with another /`/. Assuming you have no embedded |
80 | ;; back-ticks, this can used to help solve problem 3: |
81 | ;; |
82 | ;; /`/; $ugly = q?"'$?; /`/; |
83 | ;; |
84 | ;; To solve problem 6, add a /{/; before each use of ${var}: |
85 | ;; /{/; while (<${glob_me}>) ... |
86 | ;; |
87 | ;; Problem 7 is even worse, but this 'fix' does work :-( |
88 | ;; $DB'stop#' |
89 | ;; [$DB'line#' |
90 | ;; ] =~ s/;9$//; |
91 | |
92 | |
93 | (defvar perl-mode-abbrev-table nil |
94 | "Abbrev table in use in perl-mode buffers.") |
95 | (define-abbrev-table 'perl-mode-abbrev-table ()) |
96 | |
97 | (defvar perl-mode-map () |
98 | "Keymap used in Perl mode.") |
99 | (if perl-mode-map |
100 | () |
101 | (setq perl-mode-map (make-sparse-keymap)) |
102 | (define-key perl-mode-map "{" 'electric-perl-terminator) |
103 | (define-key perl-mode-map "}" 'electric-perl-terminator) |
104 | (define-key perl-mode-map ";" 'electric-perl-terminator) |
105 | (define-key perl-mode-map ":" 'electric-perl-terminator) |
106 | (define-key perl-mode-map "\e\C-a" 'perl-beginning-of-function) |
107 | (define-key perl-mode-map "\e\C-e" 'perl-end-of-function) |
108 | (define-key perl-mode-map "\e\C-h" 'mark-perl-function) |
109 | (define-key perl-mode-map "\e\C-q" 'indent-perl-exp) |
110 | (define-key perl-mode-map "\177" 'backward-delete-char-untabify) |
111 | (define-key perl-mode-map "\t" 'perl-indent-command)) |
112 | |
113 | (autoload 'c-macro-expand "cmacexp" |
114 | "Display the result of expanding all C macros occurring in the region. |
115 | The expansion is entirely correct because it uses the C preprocessor." |
116 | t) |
117 | |
118 | (defvar perl-mode-syntax-table nil |
119 | "Syntax table in use in perl-mode buffers.") |
120 | |
121 | (if perl-mode-syntax-table |
122 | () |
123 | (setq perl-mode-syntax-table (make-syntax-table (standard-syntax-table))) |
124 | (modify-syntax-entry ?\n ">" perl-mode-syntax-table) |
125 | (modify-syntax-entry ?# "<" perl-mode-syntax-table) |
126 | (modify-syntax-entry ?$ "/" perl-mode-syntax-table) |
127 | (modify-syntax-entry ?% "." perl-mode-syntax-table) |
128 | (modify-syntax-entry ?& "." perl-mode-syntax-table) |
129 | (modify-syntax-entry ?\' "\"" perl-mode-syntax-table) |
130 | (modify-syntax-entry ?* "." perl-mode-syntax-table) |
131 | (modify-syntax-entry ?+ "." perl-mode-syntax-table) |
132 | (modify-syntax-entry ?- "." perl-mode-syntax-table) |
133 | (modify-syntax-entry ?/ "." perl-mode-syntax-table) |
134 | (modify-syntax-entry ?< "." perl-mode-syntax-table) |
135 | (modify-syntax-entry ?= "." perl-mode-syntax-table) |
136 | (modify-syntax-entry ?> "." perl-mode-syntax-table) |
137 | (modify-syntax-entry ?\\ "\\" perl-mode-syntax-table) |
138 | (modify-syntax-entry ?` "\"" perl-mode-syntax-table) |
139 | (modify-syntax-entry ?| "." perl-mode-syntax-table) |
140 | ) |
141 | |
142 | (defconst perl-indent-level 4 |
143 | "*Indentation of Perl statements with respect to containing block.") |
144 | (defconst perl-continued-statement-offset 4 |
145 | "*Extra indent for lines not starting new statements.") |
146 | (defconst perl-continued-brace-offset -4 |
147 | "*Extra indent for substatements that start with open-braces. |
148 | This is in addition to perl-continued-statement-offset.") |
149 | (defconst perl-brace-offset 0 |
150 | "*Extra indentation for braces, compared with other text in same context.") |
151 | (defconst perl-brace-imaginary-offset 0 |
152 | "*Imagined indentation of an open brace that actually follows a statement.") |
153 | (defconst perl-label-offset -2 |
154 | "*Offset of Perl label lines relative to usual indentation.") |
155 | |
156 | (defconst perl-tab-always-indent t |
157 | "*Non-nil means TAB in Perl mode should always indent the current line, |
158 | regardless of where in the line point is when the TAB command is used.") |
159 | |
160 | (defconst perl-tab-to-comment t |
161 | "*Non-nil means that for lines which don't need indenting, TAB will |
162 | either indent an existing comment, move to end-of-line, or if at end-of-line |
163 | already, create a new comment.") |
164 | |
165 | (defconst perl-nochange ";?#\\|\f\\|\\s(\\|\\(\\w\\|\\s_\\)+:" |
166 | "*Lines starting with this regular expression will not be auto-indented.") |
167 | \f |
168 | (defun perl-mode () |
169 | "Major mode for editing Perl code. |
170 | Expression and list commands understand all Perl brackets. |
171 | Tab indents for Perl code. |
172 | Comments are delimited with # ... \\n. |
173 | Paragraphs are separated by blank lines only. |
174 | Delete converts tabs to spaces as it moves back. |
175 | \\{perl-mode-map} |
176 | Variables controlling indentation style: |
177 | perl-tab-always-indent |
178 | Non-nil means TAB in Perl mode should always indent the current line, |
179 | regardless of where in the line point is when the TAB command is used. |
180 | perl-tab-to-comment |
181 | Non-nil means that for lines which don't need indenting, TAB will |
182 | either delete an empty comment, indent an existing comment, move |
183 | to end-of-line, or if at end-of-line already, create a new comment. |
184 | perl-nochange |
185 | Lines starting with this regular expression will not be auto-indented. |
186 | perl-indent-level |
187 | Indentation of Perl statements within surrounding block. |
188 | The surrounding block's indentation is the indentation |
189 | of the line on which the open-brace appears. |
190 | perl-continued-statement-offset |
191 | Extra indentation given to a substatement, such as the |
192 | then-clause of an if or body of a while. |
193 | perl-continued-brace-offset |
194 | Extra indentation given to a brace that starts a substatement. |
195 | This is in addition to perl-continued-statement-offset. |
196 | perl-brace-offset |
197 | Extra indentation for line if it starts with an open brace. |
198 | perl-brace-imaginary-offset |
199 | An open brace following other text is treated as if it were |
200 | this far to the right of the start of its line. |
201 | perl-label-offset |
202 | Extra indentation for line that is a label. |
203 | |
204 | Various indentation styles: K&R BSD BLK GNU LW |
205 | perl-indent-level 5 8 0 2 4 |
206 | perl-continued-statement-offset 5 8 4 2 4 |
207 | perl-continued-brace-offset 0 0 0 0 -4 |
208 | perl-brace-offset -5 -8 0 0 0 |
209 | perl-brace-imaginary-offset 0 0 4 0 0 |
210 | perl-label-offset -5 -8 -2 -2 -2 |
211 | |
212 | Turning on Perl mode calls the value of the variable perl-mode-hook with no |
213 | args, if that value is non-nil." |
214 | (interactive) |
215 | (kill-all-local-variables) |
216 | (use-local-map perl-mode-map) |
217 | (setq major-mode 'perl-mode) |
218 | (setq mode-name "Perl") |
219 | (setq local-abbrev-table perl-mode-abbrev-table) |
220 | (set-syntax-table perl-mode-syntax-table) |
221 | (make-local-variable 'paragraph-start) |
222 | (setq paragraph-start (concat "^$\\|" page-delimiter)) |
223 | (make-local-variable 'paragraph-separate) |
224 | (setq paragraph-separate paragraph-start) |
225 | (make-local-variable 'paragraph-ignore-fill-prefix) |
226 | (setq paragraph-ignore-fill-prefix t) |
227 | (make-local-variable 'indent-line-function) |
228 | (setq indent-line-function 'perl-indent-line) |
229 | (make-local-variable 'require-final-newline) |
230 | (setq require-final-newline t) |
231 | (make-local-variable 'comment-start) |
232 | (setq comment-start "# ") |
233 | (make-local-variable 'comment-end) |
234 | (setq comment-end "") |
235 | (make-local-variable 'comment-column) |
236 | (setq comment-column 32) |
237 | (make-local-variable 'comment-start-skip) |
238 | (setq comment-start-skip "\\(^\\|\\s-\\);?#+ *") |
239 | (make-local-variable 'comment-indent-hook) |
240 | (setq comment-indent-hook 'perl-comment-indent) |
241 | (make-local-variable 'parse-sexp-ignore-comments) |
242 | (setq parse-sexp-ignore-comments nil) |
243 | (run-hooks 'perl-mode-hook)) |
244 | \f |
245 | ;; This is used by indent-for-comment |
246 | ;; to decide how much to indent a comment in Perl code |
247 | ;; based on its context. |
248 | (defun perl-comment-indent () |
249 | (if (and (bolp) (not (eolp))) |
250 | 0 ;Existing comment at bol stays there. |
251 | (save-excursion |
252 | (skip-chars-backward " \t") |
253 | (max (1+ (current-column)) ;Else indent at comment column |
254 | comment-column)))) ; except leave at least one space. |
255 | |
256 | (defun electric-perl-terminator (arg) |
257 | "Insert character. If at end-of-line, and not in a comment or a quote, |
258 | correct the line's indentation." |
259 | (interactive "P") |
260 | (let ((insertpos (point))) |
261 | (and (not arg) ; decide whether to indent |
262 | (eolp) |
263 | (save-excursion |
264 | (beginning-of-line) |
265 | (and (not ; eliminate comments quickly |
266 | (re-search-forward comment-start-skip insertpos t)) |
267 | (or (/= last-command-char ?:) |
268 | ;; Colon is special only after a label .... |
269 | (looking-at "\\s-*\\(\\w\\|\\s_\\)+$")) |
270 | (let ((pps (parse-partial-sexp |
271 | (perl-beginning-of-function) insertpos))) |
272 | (not (or (nth 3 pps) (nth 4 pps) (nth 5 pps)))))) |
273 | (progn ; must insert, indent, delete |
274 | (insert-char last-command-char 1) |
275 | (perl-indent-line) |
276 | (delete-char -1)))) |
277 | (self-insert-command (prefix-numeric-value arg))) |
278 | |
279 | ;; not used anymore, but may be useful someday: |
280 | ;;(defun perl-inside-parens-p () |
281 | ;; (condition-case () |
282 | ;; (save-excursion |
283 | ;; (save-restriction |
284 | ;; (narrow-to-region (point) |
285 | ;; (perl-beginning-of-function)) |
286 | ;; (goto-char (point-max)) |
287 | ;; (= (char-after (or (scan-lists (point) -1 1) (point-min))) ?\())) |
288 | ;; (error nil))) |
289 | \f |
290 | (defun perl-indent-command (&optional arg) |
291 | "Indent current line as Perl code, or optionally, insert a tab character. |
292 | |
293 | With an argument, indent the current line, regardless of other options. |
294 | |
295 | If perl-tab-always-indent is nil and point is not in the indentation |
296 | area at the beginning of the line, simply insert a tab. |
297 | |
298 | Otherwise, indent the current line. If point was within the indentation |
299 | area it is moved to the end of the indentation area. If the line was |
300 | already indented properly and point was not within the indentation area, |
301 | and if perl-tab-to-comment is non-nil (the default), then do the first |
302 | possible action from the following list: |
303 | |
304 | 1) delete an empty comment |
305 | 2) move forward to start of comment, indenting if necessary |
306 | 3) move forward to end of line |
307 | 4) create an empty comment |
308 | 5) move backward to start of comment, indenting if necessary." |
309 | (interactive "P") |
310 | (if arg ; If arg, just indent this line |
311 | (perl-indent-line "\f") |
312 | (if (and (not perl-tab-always-indent) |
313 | (<= (current-column) (current-indentation))) |
314 | (insert-tab) |
315 | (let (bof lsexp delta (oldpnt (point))) |
316 | (beginning-of-line) |
317 | (setq lsexp (point)) |
318 | (setq bof (perl-beginning-of-function)) |
319 | (goto-char oldpnt) |
320 | (setq delta (perl-indent-line "\f\\|;?#" bof)) |
321 | (and perl-tab-to-comment |
322 | (= oldpnt (point)) ; done if point moved |
323 | (if (listp delta) ; if line starts in a quoted string |
324 | (setq lsexp (or (nth 2 delta) bof)) |
325 | (= delta 0)) ; done if indenting occurred |
326 | (let (eol state) |
327 | (end-of-line) |
328 | (setq eol (point)) |
329 | (if (= (char-after bof) ?=) |
330 | (if (= oldpnt eol) |
331 | (message "In a format statement")) |
332 | (setq state (parse-partial-sexp lsexp eol)) |
333 | (if (nth 3 state) |
334 | (if (= oldpnt eol) ; already at eol in a string |
335 | (message "In a string which starts with a %c." |
336 | (nth 3 state))) |
337 | (if (not (nth 4 state)) |
338 | (if (= oldpnt eol) ; no comment, create one? |
339 | (indent-for-comment)) |
340 | (beginning-of-line) |
341 | (if (re-search-forward comment-start-skip eol 'move) |
342 | (if (eolp) |
343 | (progn ; kill existing comment |
344 | (goto-char (match-beginning 0)) |
345 | (skip-chars-backward " \t") |
346 | (kill-region (point) eol)) |
347 | (if (or (< oldpnt (point)) (= oldpnt eol)) |
348 | (indent-for-comment) ; indent existing comment |
349 | (end-of-line))) |
350 | (if (/= oldpnt eol) |
351 | (end-of-line) |
352 | (message "Use backslash to quote # characters.") |
353 | (ding t)))))))))))) |
354 | |
355 | (defun perl-indent-line (&optional nochange parse-start) |
356 | "Indent current line as Perl code. Return the amount the indentation |
357 | changed by, or (parse-state) if line starts in a quoted string." |
358 | (let ((case-fold-search nil) |
359 | (pos (- (point-max) (point))) |
360 | (bof (or parse-start (save-excursion (perl-beginning-of-function)))) |
361 | beg indent shift-amt) |
362 | (beginning-of-line) |
363 | (setq beg (point)) |
364 | (setq shift-amt |
365 | (cond ((= (char-after bof) ?=) 0) |
366 | ((listp (setq indent (calculate-perl-indent bof))) indent) |
367 | ((looking-at (or nochange perl-nochange)) 0) |
368 | (t |
369 | (skip-chars-forward " \t\f") |
370 | (cond ((looking-at "\\(\\w\\|\\s_\\)+:") |
371 | (setq indent (max 1 (+ indent perl-label-offset)))) |
372 | ((= (following-char) ?}) |
373 | (setq indent (- indent perl-indent-level))) |
374 | ((= (following-char) ?{) |
375 | (setq indent (+ indent perl-brace-offset)))) |
376 | (- indent (current-column))))) |
377 | (skip-chars-forward " \t\f") |
378 | (if (and (numberp shift-amt) (/= 0 shift-amt)) |
379 | (progn (delete-region beg (point)) |
380 | (indent-to indent))) |
381 | ;; If initial point was within line's indentation, |
382 | ;; position after the indentation. Else stay at same point in text. |
383 | (if (> (- (point-max) pos) (point)) |
384 | (goto-char (- (point-max) pos))) |
385 | shift-amt)) |
386 | |
387 | (defun calculate-perl-indent (&optional parse-start) |
388 | "Return appropriate indentation for current line as Perl code. |
389 | In usual case returns an integer: the column to indent to. |
390 | Returns (parse-state) if line starts inside a string." |
391 | (save-excursion |
392 | (beginning-of-line) |
393 | (let ((indent-point (point)) |
394 | (case-fold-search nil) |
395 | (colon-line-end 0) |
396 | state containing-sexp) |
397 | (if parse-start ;used to avoid searching |
398 | (goto-char parse-start) |
399 | (perl-beginning-of-function)) |
400 | (while (< (point) indent-point) ;repeat until right sexp |
401 | (setq parse-start (point)) |
402 | (setq state (parse-partial-sexp (point) indent-point 0)) |
403 | ; state = (depth_in_parens innermost_containing_list last_complete_sexp |
404 | ; string_terminator_or_nil inside_commentp following_quotep |
405 | ; minimum_paren-depth_this_scan) |
406 | ; Parsing stops if depth in parentheses becomes equal to third arg. |
407 | (setq containing-sexp (nth 1 state))) |
408 | (cond ((nth 3 state) state) ; In a quoted string? |
409 | ((null containing-sexp) ; Line is at top level. |
410 | (skip-chars-forward " \t\f") |
411 | (if (= (following-char) ?{) |
412 | 0 ; move to beginning of line if it starts a function body |
413 | ;; indent a little if this is a continuation line |
414 | (perl-backward-to-noncomment) |
415 | (if (or (bobp) |
416 | (memq (preceding-char) '(?\; ?\}))) |
417 | 0 perl-continued-statement-offset))) |
418 | ((/= (char-after containing-sexp) ?{) |
419 | ;; line is expression, not statement: |
420 | ;; indent to just after the surrounding open. |
421 | (goto-char (1+ containing-sexp)) |
422 | (current-column)) |
423 | (t |
424 | ;; Statement level. Is it a continuation or a new statement? |
425 | ;; Find previous non-comment character. |
426 | (perl-backward-to-noncomment) |
427 | ;; Back up over label lines, since they don't |
428 | ;; affect whether our line is a continuation. |
429 | (while (or (eq (preceding-char) ?\,) |
430 | (and (eq (preceding-char) ?:) |
431 | (memq (char-syntax (char-after (- (point) 2))) |
432 | '(?w ?_)))) |
433 | (if (eq (preceding-char) ?\,) |
434 | (perl-backward-to-start-of-continued-exp containing-sexp)) |
435 | (beginning-of-line) |
436 | (perl-backward-to-noncomment)) |
437 | ;; Now we get the answer. |
438 | (if (not (memq (preceding-char) '(?\; ?\} ?\{))) |
439 | ;; This line is continuation of preceding line's statement; |
440 | ;; indent perl-continued-statement-offset more than the |
441 | ;; previous line of the statement. |
442 | (progn |
443 | (perl-backward-to-start-of-continued-exp containing-sexp) |
444 | (+ perl-continued-statement-offset (current-column) |
445 | (if (save-excursion (goto-char indent-point) |
446 | (looking-at "[ \t]*{")) |
447 | perl-continued-brace-offset 0))) |
448 | ;; This line starts a new statement. |
449 | ;; Position at last unclosed open. |
450 | (goto-char containing-sexp) |
451 | (or |
452 | ;; If open paren is in col 0, close brace is special |
453 | (and (bolp) |
454 | (save-excursion (goto-char indent-point) |
455 | (looking-at "[ \t]*}")) |
456 | perl-indent-level) |
457 | ;; Is line first statement after an open-brace? |
458 | ;; If no, find that first statement and indent like it. |
459 | (save-excursion |
460 | (forward-char 1) |
461 | ;; Skip over comments and labels following openbrace. |
462 | (while (progn |
463 | (skip-chars-forward " \t\f\n") |
464 | (cond ((looking-at ";?#") |
465 | (forward-line 1) t) |
466 | ((looking-at "\\(\\w\\|\\s_\\)+:") |
467 | (save-excursion |
468 | (end-of-line) |
469 | (setq colon-line-end (point))) |
470 | (search-forward ":"))))) |
471 | ;; The first following code counts |
472 | ;; if it is before the line we want to indent. |
473 | (and (< (point) indent-point) |
474 | (if (> colon-line-end (point)) |
475 | (- (current-indentation) perl-label-offset) |
476 | (current-column)))) |
477 | ;; If no previous statement, |
478 | ;; indent it relative to line brace is on. |
479 | ;; For open paren in column zero, don't let statement |
480 | ;; start there too. If perl-indent-level is zero, |
481 | ;; use perl-brace-offset + perl-continued-statement-offset |
482 | ;; For open-braces not the first thing in a line, |
483 | ;; add in perl-brace-imaginary-offset. |
484 | (+ (if (and (bolp) (zerop perl-indent-level)) |
485 | (+ perl-brace-offset perl-continued-statement-offset) |
486 | perl-indent-level) |
487 | ;; Move back over whitespace before the openbrace. |
488 | ;; If openbrace is not first nonwhite thing on the line, |
489 | ;; add the perl-brace-imaginary-offset. |
490 | (progn (skip-chars-backward " \t") |
491 | (if (bolp) 0 perl-brace-imaginary-offset)) |
492 | ;; If the openbrace is preceded by a parenthesized exp, |
493 | ;; move to the beginning of that; |
494 | ;; possibly a different line |
495 | (progn |
496 | (if (eq (preceding-char) ?\)) |
497 | (forward-sexp -1)) |
498 | ;; Get initial indentation of the line we are on. |
499 | (current-indentation)))))))))) |
500 | |
501 | (defun perl-backward-to-noncomment () |
502 | "Move point backward to after the first non-white-space, skipping comments." |
503 | (interactive) |
504 | (let (opoint stop) |
505 | (while (not stop) |
506 | (setq opoint (point)) |
507 | (beginning-of-line) |
508 | (if (re-search-forward comment-start-skip opoint 'move 1) |
509 | (progn (goto-char (match-end 1)) |
510 | (skip-chars-forward ";"))) |
511 | (skip-chars-backward " \t\f") |
512 | (setq stop (or (bobp) |
513 | (not (bolp)) |
514 | (forward-char -1)))))) |
515 | |
516 | (defun perl-backward-to-start-of-continued-exp (lim) |
517 | (if (= (preceding-char) ?\)) |
518 | (forward-sexp -1)) |
519 | (beginning-of-line) |
520 | (if (<= (point) lim) |
521 | (goto-char (1+ lim))) |
522 | (skip-chars-forward " \t\f")) |
523 | \f |
524 | ;; note: this may be slower than the c-mode version, but I can understand it. |
525 | (defun indent-perl-exp () |
526 | "Indent each line of the Perl grouping following point." |
527 | (interactive) |
528 | (let* ((case-fold-search nil) |
529 | (oldpnt (point-marker)) |
530 | (bof-mark (save-excursion |
531 | (end-of-line 2) |
532 | (perl-beginning-of-function) |
533 | (point-marker))) |
534 | eol last-mark lsexp-mark delta) |
535 | (if (= (char-after (marker-position bof-mark)) ?=) |
536 | (message "Can't indent a format statement") |
537 | (message "Indenting Perl expression...") |
538 | (save-excursion (end-of-line) (setq eol (point))) |
539 | (save-excursion ; locate matching close paren |
540 | (while (and (not (eobp)) (<= (point) eol)) |
541 | (parse-partial-sexp (point) (point-max) 0)) |
542 | (setq last-mark (point-marker))) |
543 | (setq lsexp-mark bof-mark) |
544 | (beginning-of-line) |
545 | (while (< (point) (marker-position last-mark)) |
546 | (setq delta (perl-indent-line nil (marker-position bof-mark))) |
547 | (if (numberp delta) ; unquoted start-of-line? |
548 | (progn |
549 | (if (eolp) |
550 | (delete-horizontal-space)) |
551 | (setq lsexp-mark (point-marker)))) |
552 | (end-of-line) |
553 | (setq eol (point)) |
554 | (if (nth 4 (parse-partial-sexp (marker-position lsexp-mark) eol)) |
555 | (progn ; line ends in a comment |
556 | (beginning-of-line) |
557 | (if (or (not (looking-at "\\s-*;?#")) |
558 | (listp delta) |
559 | (and (/= 0 delta) |
560 | (= (- (current-indentation) delta) comment-column))) |
561 | (if (re-search-forward comment-start-skip eol t) |
562 | (indent-for-comment))))) ; indent existing comment |
563 | (forward-line 1)) |
564 | (goto-char (marker-position oldpnt)) |
565 | (message "Indenting Perl expression...done")))) |
566 | \f |
567 | (defun perl-beginning-of-function (&optional arg) |
568 | "Move backward to next beginning-of-function, or as far as possible. |
569 | With argument, repeat that many times; negative args move forward. |
570 | Returns new value of point in all cases." |
571 | (interactive "p") |
572 | (or arg (setq arg 1)) |
573 | (if (< arg 0) (forward-char 1)) |
574 | (and (/= arg 0) |
352d5a3a |
575 | (re-search-backward "^\\s(\\|^\\s-*sub\\b[^{]+{\\|^\\s-*format\\b[^=]*=\\|^\\." |
fe14fcc3 |
576 | nil 'move arg) |
577 | (goto-char (1- (match-end 0)))) |
578 | (point)) |
579 | |
580 | ;; note: this routine is adapted directly from emacs lisp.el, end-of-defun; |
581 | ;; no bugs have been removed :-) |
582 | (defun perl-end-of-function (&optional arg) |
583 | "Move forward to next end-of-function. |
584 | The end of a function is found by moving forward from the beginning of one. |
585 | With argument, repeat that many times; negative args move backward." |
586 | (interactive "p") |
587 | (or arg (setq arg 1)) |
588 | (let ((first t)) |
589 | (while (and (> arg 0) (< (point) (point-max))) |
590 | (let ((pos (point)) npos) |
591 | (while (progn |
592 | (if (and first |
593 | (progn |
594 | (forward-char 1) |
595 | (perl-beginning-of-function 1) |
596 | (not (bobp)))) |
597 | nil |
598 | (or (bobp) (forward-char -1)) |
599 | (perl-beginning-of-function -1)) |
600 | (setq first nil) |
601 | (forward-list 1) |
602 | (skip-chars-forward " \t") |
603 | (if (looking-at "[#\n]") |
604 | (forward-line 1)) |
605 | (<= (point) pos)))) |
606 | (setq arg (1- arg))) |
607 | (while (< arg 0) |
608 | (let ((pos (point))) |
609 | (perl-beginning-of-function 1) |
610 | (forward-sexp 1) |
611 | (forward-line 1) |
612 | (if (>= (point) pos) |
613 | (if (progn (perl-beginning-of-function 2) (not (bobp))) |
614 | (progn |
615 | (forward-list 1) |
616 | (skip-chars-forward " \t") |
617 | (if (looking-at "[#\n]") |
618 | (forward-line 1))) |
619 | (goto-char (point-min))))) |
620 | (setq arg (1+ arg))))) |
621 | |
622 | (defun mark-perl-function () |
623 | "Put mark at end of Perl function, point at beginning." |
624 | (interactive) |
625 | (push-mark (point)) |
626 | (perl-end-of-function) |
627 | (push-mark (point)) |
628 | (perl-beginning-of-function) |
629 | (backward-paragraph)) |
630 | |
631 | ;;;;;;;; That's all, folks! ;;;;;;;;; |