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c0274f38 ER |
1 | ;;; array.el --- array editing commands for Gnu Emacs |
2 | ||
b1d6ae0b JB |
3 | ;;; Written by dmb%morgoth@harvard.harvard.edu (address is old) |
4 | ;;; (David M. Brown at Goldberg-Zoino & Associates, Inc.) | |
5 | ;;; Thanks to cph@kleph.ai.mit.edu for assistance | |
6 | ||
7 | ;; Copyright (C) 1987 Free Software Foundation, Inc. | |
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 1, 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 | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
25 | ;;; To do: | |
26 | ;;; Smooth initialization process by grokking local variables list | |
27 | ;;; at end of buffer or parsing buffer using whitespace as delimiters. | |
28 | ;;; Make 'array-copy-column-right faster. | |
29 | ||
30 | \f | |
31 | ||
32 | ;;; Internal information functions. | |
33 | ||
34 | (defun array-cursor-in-array-range () | |
35 | "Returns t if the cursor is in a valid array cell. | |
36 | Its ok to be on a row number line." | |
37 | (let ((columns-last-line (% max-column columns-per-line))) | |
38 | ;; Requires buffer-line and buffer-column to be current. | |
39 | (not (or | |
40 | ;; The cursor is too far to the right. | |
41 | (>= buffer-column line-length) | |
42 | ;; The cursor is below the last row. | |
43 | (>= buffer-line (* lines-per-row max-row)) | |
44 | ;; The cursor is on the last line of the row, the line is smaller | |
45 | ;; than the others, and the cursor is after the last array column | |
46 | ;; on the line. | |
47 | (and (zerop (% (1+ buffer-line) lines-per-row)) | |
48 | (not (zerop columns-last-line)) | |
49 | (>= buffer-column (* columns-last-line field-width))))))) | |
50 | ||
51 | (defun array-current-row () | |
52 | "Return the array row of the field in which the cursor is located." | |
53 | ;; Requires buffer-line and buffer-column to be current. | |
54 | (and (array-cursor-in-array-range) | |
55 | (1+ (floor buffer-line lines-per-row)))) | |
56 | ||
57 | (defun array-current-column () | |
58 | "Return the array column of the field in which the cursor is located." | |
59 | ;; Requires buffer-line and buffer-column to be current. | |
60 | (and (array-cursor-in-array-range) | |
61 | ;; It's not okay to be on a row number line. | |
62 | (not (and rows-numbered | |
63 | (zerop (% buffer-line lines-per-row)))) | |
64 | (+ | |
65 | ;; Array columns due to line differences. | |
66 | (* columns-per-line | |
67 | (if rows-numbered | |
68 | (1- (% buffer-line lines-per-row)) | |
69 | (% buffer-line lines-per-row))) | |
70 | ;; Array columns on the current line. | |
71 | (ceiling (1+ buffer-column) field-width)))) | |
72 | ||
73 | (defun array-update-array-position (&optional a-row a-column) | |
74 | "Set `array-row' and `array-column' to their current values or | |
75 | to the optional arguments A-ROW and A-COLUMN." | |
76 | ;; Requires that buffer-line and buffer-column be current. | |
77 | (setq array-row (or a-row (array-current-row)) | |
78 | array-column (or a-column (array-current-column)))) | |
79 | ||
80 | (defun array-update-buffer-position () | |
81 | "Set buffer-line and buffer-column to their current values." | |
82 | (setq buffer-line (current-line) | |
83 | buffer-column (current-column))) | |
84 | ||
85 | \f | |
86 | ||
87 | ;;; Information commands. | |
88 | ||
89 | (defun array-what-position () | |
90 | "Display the row and column in which the cursor is positioned." | |
91 | (interactive) | |
92 | (let ((buffer-line (current-line)) | |
93 | (buffer-column (current-column))) | |
94 | (message (format "Array row: %s Array column: %s" | |
95 | (prin1-to-string (array-current-row)) | |
96 | (prin1-to-string (array-current-column)))))) | |
97 | ||
98 | (defun array-display-local-variables () | |
99 | "Display the current state of the local variables in the minibuffer." | |
100 | (interactive) | |
101 | (let ((buf (buffer-name (current-buffer)))) | |
102 | (with-output-to-temp-buffer "*Local Variables*" | |
103 | (buffer-disable-undo standard-output) | |
104 | (terpri) | |
105 | (princ (format " Buffer: %s\n\n" buf)) | |
106 | (princ (format " max-row: %s\n" | |
107 | (prin1-to-string max-row))) | |
108 | (princ (format " max-column: %s\n" | |
109 | (prin1-to-string max-column))) | |
110 | (princ (format " columns-per-line: %s\n" | |
111 | (prin1-to-string columns-per-line))) | |
112 | (princ (format " field-width: %s\n" | |
113 | (prin1-to-string field-width))) | |
114 | (princ (format " rows-numbered: %s\n" | |
115 | (prin1-to-string rows-numbered))) | |
116 | (princ (format " lines-per-row: %s\n" | |
117 | (prin1-to-string lines-per-row))) | |
118 | (princ (format " line-length: %s\n" | |
119 | (prin1-to-string line-length)))))) | |
120 | ||
121 | \f | |
122 | ||
123 | ;;; Internal movement functions. | |
124 | ||
125 | (defun array-beginning-of-field (&optional go-there) | |
126 | "Return the column of the beginning of the current field. | |
127 | Optional argument GO-THERE, if non-nil, means go there too." | |
128 | ;; Requires that buffer-column be current. | |
129 | (let ((goal-column (- buffer-column (% buffer-column field-width)))) | |
130 | (if go-there | |
131 | (move-to-column-untabify goal-column) | |
132 | goal-column))) | |
133 | ||
134 | (defun array-end-of-field (&optional go-there) | |
135 | "Return the column of the end of the current array field. | |
136 | If optional argument GO-THERE is non-nil, go there too." | |
137 | ;; Requires that buffer-column be current. | |
138 | (let ((goal-column (+ (- buffer-column (% buffer-column field-width)) | |
139 | field-width))) | |
140 | (if go-there | |
141 | (move-to-column-untabify goal-column) | |
142 | goal-column))) | |
143 | ||
144 | (defun array-move-to-cell (a-row a-column) | |
145 | "Move to array row A-ROW and array column A-COLUMN. | |
146 | Leave point at the beginning of the field and return the new buffer column." | |
147 | (let ((goal-line (+ (* lines-per-row (1- a-row)) | |
148 | (if rows-numbered 1 0) | |
149 | (floor (1- a-column) columns-per-line))) | |
150 | (goal-column (* field-width (% (1- a-column) columns-per-line)))) | |
151 | (goto-char (point-min)) | |
152 | (forward-line goal-line) | |
153 | (move-to-column-untabify goal-column))) | |
154 | ||
155 | (defun array-move-to-row (a-row) | |
156 | "Move to array row A-ROW preserving the current array column. | |
157 | Leave point at the beginning of the field and return the new array row." | |
158 | ;; Requires that buffer-line and buffer-column be current. | |
159 | (let ((goal-line (+ (* lines-per-row (1- a-row)) | |
160 | (% buffer-line lines-per-row))) | |
161 | (goal-column (- buffer-column (% buffer-column field-width)))) | |
162 | (forward-line (- goal-line buffer-line)) | |
163 | (move-to-column-untabify goal-column) | |
164 | a-row)) | |
165 | ||
166 | (defun array-move-to-column (a-column) | |
167 | "Move to array column A-COLUMN preserving the current array row. | |
168 | Leave point at the beginning of the field and return the new array column." | |
169 | ;; Requires that buffer-line and buffer-column be current. | |
170 | (let ((goal-line (+ (- buffer-line (% buffer-line lines-per-row)) | |
171 | (if rows-numbered 1 0) | |
172 | (floor (1- a-column) columns-per-line))) | |
173 | (goal-column (* field-width (% (1- a-column) columns-per-line)))) | |
174 | (forward-line (- goal-line buffer-line)) | |
175 | (move-to-column-untabify goal-column) | |
176 | a-column)) | |
177 | ||
178 | (defun array-move-one-row (sign) | |
179 | "Move one array row in direction SIGN (1 or -1). | |
180 | Leave point at the beginning of the field and return the new array row. | |
181 | If requested to move beyond the array bounds, signal an error." | |
182 | ;; Requires that buffer-line and buffer-column be current. | |
183 | (let ((goal-column (array-beginning-of-field)) | |
184 | (array-row (or (array-current-row) | |
185 | (error "Cursor is not in a valid array cell.")))) | |
186 | (cond ((and (= array-row max-row) (= sign 1)) | |
187 | (error "End of array.")) | |
188 | ((and (= array-row 1) (= sign -1)) | |
189 | (error "Beginning of array.")) | |
190 | (t | |
191 | (progn | |
192 | (forward-line (* sign lines-per-row)) | |
193 | (move-to-column-untabify goal-column) | |
194 | (+ array-row sign)))))) | |
195 | ||
196 | (defun array-move-one-column (sign) | |
197 | "Move one array column in direction SIGN (1 or -1). | |
198 | Leave point at the beginning of the field and return the new array column. | |
199 | If requested to move beyond the array bounds, signal an error." | |
200 | ;; Requires that buffer-line and buffer-column be current. | |
201 | (let ((array-column (or (array-current-column) | |
202 | (error "Cursor is not in a valid array cell.")))) | |
203 | (cond ((and (= array-column max-column) (= sign 1)) | |
204 | (error "End of array.")) | |
205 | ((and (= array-column 1) (= sign -1)) | |
206 | (error "Beginning of array.")) | |
207 | (t | |
208 | (cond | |
209 | ;; Going backward from first column on the line. | |
210 | ((and (= sign -1) (= 1 (% array-column columns-per-line))) | |
211 | (forward-line -1) | |
212 | (move-to-column-untabify | |
213 | (* field-width (1- columns-per-line)))) | |
214 | ;; Going forward from last column on the line. | |
215 | ((and (= sign 1) (zerop (% array-column columns-per-line))) | |
216 | (forward-line 1)) | |
217 | ;; Somewhere in the middle of the line. | |
218 | (t | |
219 | (move-to-column-untabify (+ (array-beginning-of-field) | |
220 | (* field-width sign))))) | |
221 | (+ array-column sign))))) | |
222 | ||
223 | (defun array-normalize-cursor () | |
224 | "Move the cursor to the first non-whitespace character in the field and, | |
225 | if necessary, scroll horizontally to keep the cursor in view." | |
226 | ;; Assumes point is at the beginning of the field. | |
227 | (let ((buffer-column (current-column))) | |
228 | (skip-chars-forward " \t" | |
229 | (1- (save-excursion (array-end-of-field t) (point)))) | |
230 | (array-maybe-scroll-horizontally))) | |
231 | ||
232 | (defun array-maybe-scroll-horizontally () | |
233 | "If necessary, scroll horizontally to keep the cursor in view." | |
234 | ;; This is only called from array-normalize-cursor so | |
235 | ;; buffer-column will always be current. | |
236 | (let ((w-hscroll (window-hscroll)) | |
237 | (w-width (window-width))) | |
238 | (cond | |
239 | ((and (>= buffer-column w-hscroll) | |
240 | (<= buffer-column (+ w-hscroll w-width))) | |
241 | ;; It's already visible. Do nothing. | |
242 | nil) | |
243 | ((> buffer-column (+ w-hscroll w-width)) | |
244 | ;; It's to the right. Scroll left. | |
245 | (scroll-left (- (- buffer-column w-hscroll) | |
246 | (/ w-width 2)))) | |
247 | (t | |
248 | ;; It's to the left. Scroll right. | |
249 | (scroll-right (+ (- w-hscroll buffer-column) | |
250 | (/ w-width 2))))))) | |
251 | ||
252 | \f | |
253 | ||
254 | ;;; Movement commands. | |
255 | ||
256 | (defun array-next-row (&optional arg) | |
257 | "Move down one array row, staying in the current array column. | |
258 | If optional ARG is given, move down ARG array rows." | |
259 | (interactive "p") | |
260 | (let ((buffer-line (current-line)) | |
261 | (buffer-column (current-column))) | |
262 | (if (= (abs arg) 1) | |
263 | (array-move-one-row arg) | |
264 | (array-move-to-row | |
265 | (limit-index (+ (or (array-current-row) | |
266 | (error "Cursor is not in an array cell.")) | |
267 | arg) | |
268 | max-row)))) | |
269 | (array-normalize-cursor)) | |
270 | ||
271 | (defun array-previous-row (&optional arg) | |
272 | "Move up one array row, staying in the current array column. | |
273 | If optional ARG is given, move up ARG array rows." | |
274 | (interactive "p") | |
275 | (array-next-row (- arg))) | |
276 | ||
277 | (defun array-forward-column (&optional arg) | |
278 | "Move forward one field, staying in the current array row. | |
279 | If optional ARG is given, move forward ARG array columns. | |
280 | If necessary, keep the cursor in the window by scrolling right or left." | |
281 | (interactive "p") | |
282 | (let ((buffer-line (current-line)) | |
283 | (buffer-column (current-column))) | |
284 | (if (= (abs arg) 1) | |
285 | (array-move-one-column arg) | |
286 | (array-move-to-column | |
287 | (limit-index (+ (or (array-current-column) | |
288 | (error "Cursor is not in an array cell.")) | |
289 | arg) | |
290 | max-column)))) | |
291 | (array-normalize-cursor)) | |
292 | ||
293 | (defun array-backward-column (&optional arg) | |
294 | "Move backward one field, staying in the current array row. | |
295 | If optional ARG is given, move backward ARG array columns. | |
296 | If necessary, keep the cursor in the window by scrolling right or left." | |
297 | (interactive "p") | |
298 | (array-forward-column (- arg))) | |
299 | ||
300 | (defun array-goto-cell (a-row a-column) | |
301 | "Go to array row A-ROW and array column A-COLUMN." | |
302 | (interactive "nArray row: \nnArray column: ") | |
303 | (array-move-to-cell | |
304 | (limit-index a-row max-row) | |
305 | (limit-index a-column max-column)) | |
306 | (array-normalize-cursor)) | |
307 | ||
308 | \f | |
309 | ||
310 | ;;; Internal copying functions. | |
311 | ||
312 | (defun array-field-string () | |
313 | "Return the field string at the current cursor location." | |
314 | ;; Requires that buffer-column be current. | |
315 | (buffer-substring | |
316 | (save-excursion (array-beginning-of-field t) (point)) | |
317 | (save-excursion (array-end-of-field t) (point)))) | |
318 | ||
319 | (defun array-copy-once-vertically (sign) | |
320 | "Copy the current field into one array row in direction SIGN (1 or -1). | |
321 | Leave point at the beginning of the field and return the new array row. | |
322 | If requested to move beyond the array bounds, signal an error." | |
323 | ;; Requires that buffer-line, buffer-column, and copy-string be current. | |
324 | (let ((a-row (array-move-one-row sign))) | |
325 | (let ((inhibit-quit t)) | |
326 | (delete-region (point) (save-excursion (array-end-of-field t) (point))) | |
327 | (insert copy-string)) | |
328 | (move-to-column buffer-column) | |
329 | a-row)) | |
330 | ||
331 | (defun array-copy-once-horizontally (sign) | |
332 | "Copy the current field into one array column in direction SIGN (1 or -1). | |
333 | Leave point at the beginning of the field and return the new array column. | |
334 | If requested to move beyond the array bounds, signal an error." | |
335 | ;; Requires that buffer-line, buffer-column, and copy-string be current. | |
336 | (let ((a-column (array-move-one-column sign))) | |
337 | (array-update-buffer-position) | |
338 | (let ((inhibit-quit t)) | |
339 | (delete-region (point) (save-excursion (array-end-of-field t) (point))) | |
340 | (insert copy-string)) | |
341 | (move-to-column buffer-column) | |
342 | a-column)) | |
343 | ||
344 | (defun array-copy-to-row (a-row) | |
345 | "Copy the current field vertically into every cell up to and including A-ROW. | |
346 | Leave point at the beginning of the field." | |
347 | ;; Requires that buffer-line, buffer-column, array-row, and | |
348 | ;; copy-string be current. | |
349 | (let* ((num (- a-row array-row)) | |
350 | (count (abs num)) | |
351 | (sign (if (zerop count) () (/ num count)))) | |
352 | (while (> count 0) | |
353 | (array-move-one-row sign) | |
354 | (array-update-buffer-position) | |
355 | (let ((inhibit-quit t)) | |
356 | (delete-region (point) (save-excursion (array-end-of-field t) (point))) | |
357 | (insert copy-string)) | |
358 | (move-to-column buffer-column) | |
359 | (setq count (1- count))))) | |
360 | ||
361 | (defun array-copy-to-column (a-column) | |
362 | "Copy the current field horizontally into every cell up to and including | |
363 | A-COLUMN. Leave point at the beginning of the field." | |
364 | ;; Requires that buffer-line, buffer-column, array-column, and | |
365 | ;; copy-string be current. | |
366 | (let* ((num (- a-column array-column)) | |
367 | (count (abs num)) | |
368 | (sign (if (zerop count) () (/ num count)))) | |
369 | (while (> count 0) | |
370 | (array-move-one-column sign) | |
371 | (array-update-buffer-position) | |
372 | (let ((inhibit-quit t)) | |
373 | (delete-region (point) (save-excursion (array-end-of-field t) (point))) | |
374 | (insert copy-string)) | |
375 | (move-to-column buffer-column) | |
376 | (setq count (1- count))))) | |
377 | ||
378 | (defun array-copy-to-cell (a-row a-column) | |
379 | "Copy the current field into the cell at A-ROW, A-COLUMN. | |
380 | Leave point at the beginning of the field." | |
381 | ;; Requires that copy-string be current. | |
382 | (array-move-to-cell a-row a-column) | |
383 | (array-update-buffer-position) | |
384 | (delete-region (point) (save-excursion (array-end-of-field t) (point))) | |
385 | (insert copy-string) | |
386 | (move-to-column buffer-column)) | |
387 | ||
388 | \f | |
389 | ||
390 | ;;; Commands for copying. | |
391 | ||
392 | (defun array-copy-down (&optional arg) | |
393 | "Copy the current field one array row down. | |
394 | If optional ARG is given, copy down through ARG array rows." | |
395 | (interactive "p") | |
396 | (let* ((buffer-line (current-line)) | |
397 | (buffer-column (current-column)) | |
398 | (array-row (or (array-current-row) | |
399 | (error "Cursor is not in a valid array cell."))) | |
400 | (copy-string (array-field-string))) | |
401 | (if (= (abs arg) 1) | |
402 | (array-copy-once-vertically arg) | |
403 | (array-copy-to-row | |
404 | (limit-index (+ array-row arg) max-row)))) | |
405 | (array-normalize-cursor)) | |
406 | ||
407 | (defun array-copy-up (&optional arg) | |
408 | "Copy the current field one array row up. | |
409 | If optional ARG is given, copy up through ARG array rows." | |
410 | (interactive "p") | |
411 | (array-copy-down (- arg))) | |
412 | ||
413 | (defun array-copy-forward (&optional arg) | |
414 | "Copy the current field one array column to the right. | |
415 | If optional ARG is given, copy through ARG array columns to the right." | |
416 | (interactive "p") | |
417 | (let* ((buffer-line (current-line)) | |
418 | (buffer-column (current-column)) | |
419 | (array-column (or (array-current-column) | |
420 | (error "Cursor is not in a valid array cell."))) | |
421 | (copy-string (array-field-string))) | |
422 | (if (= (abs arg) 1) | |
423 | (array-copy-once-horizontally arg) | |
424 | (array-copy-to-column | |
425 | (limit-index (+ array-column arg) max-column)))) | |
426 | (array-normalize-cursor)) | |
427 | ||
428 | (defun array-copy-backward (&optional arg) | |
429 | "Copy the current field one array column to the left. | |
430 | If optional ARG is given, copy through ARG array columns to the left." | |
431 | (interactive "p") | |
432 | (array-copy-forward (- arg))) | |
433 | ||
434 | (defun array-copy-column-forward (&optional arg) | |
435 | "Copy the entire current column in to the column to the right. | |
436 | If optional ARG is given, copy through ARG array columns to the right." | |
437 | (interactive "p") | |
438 | (array-update-buffer-position) | |
439 | (array-update-array-position) | |
440 | (if (not array-column) | |
441 | (error "Cursor is not in a valid array cell.")) | |
442 | (message "Working...") | |
443 | (let ((this-row 0)) | |
444 | (while (< this-row max-row) | |
445 | (setq this-row (1+ this-row)) | |
446 | (array-move-to-cell this-row array-column) | |
447 | (array-update-buffer-position) | |
448 | (let ((copy-string (array-field-string))) | |
449 | (if (= (abs arg) 1) | |
450 | (array-copy-once-horizontally arg) | |
451 | (array-copy-to-column | |
452 | (limit-index (+ array-column arg) max-column)))))) | |
453 | (message "Working...done") | |
454 | (array-move-to-row array-row) | |
455 | (array-normalize-cursor)) | |
456 | ||
457 | (defun array-copy-column-backward (&optional arg) | |
458 | "Copy the entire current column one column to the left. | |
459 | If optional ARG is given, copy through ARG columns to the left." | |
460 | (interactive "p") | |
461 | (array-copy-column-forward (- arg))) | |
462 | ||
463 | (defun array-copy-row-down (&optional arg) | |
464 | "Copy the entire current row one row down. | |
465 | If optional ARG is given, copy through ARG rows down." | |
466 | (interactive "p") | |
467 | (array-update-buffer-position) | |
468 | (array-update-array-position) | |
469 | (if (not array-row) | |
470 | (error "Cursor is not in a valid array cell.")) | |
471 | (cond | |
472 | ((and (= array-row 1) (= arg -1)) | |
473 | (error "Beginning of array.")) | |
474 | ((and (= array-row max-row) (= arg 1)) | |
475 | (error "End of array.")) | |
476 | (t | |
477 | (let* ((copy-string | |
478 | (buffer-substring | |
479 | (save-excursion (array-move-to-cell array-row 1) | |
480 | (point)) | |
481 | (save-excursion (array-move-to-cell array-row max-column) | |
482 | (forward-line 1) | |
483 | (point)))) | |
484 | (this-row array-row) | |
485 | (goal-row (limit-index (+ this-row arg) max-row)) | |
486 | (num (- goal-row this-row)) | |
487 | (count (abs num)) | |
488 | (sign (if (not (zerop count)) (/ num count)))) | |
489 | (while (> count 0) | |
490 | (setq this-row (+ this-row sign)) | |
491 | (array-move-to-cell this-row 1) | |
492 | (let ((inhibit-quit t)) | |
493 | (delete-region (point) | |
494 | (save-excursion | |
495 | (array-move-to-cell this-row max-column) | |
496 | (forward-line 1) | |
497 | (point))) | |
498 | (insert copy-string)) | |
499 | (setq count (1- count))) | |
500 | (array-move-to-cell goal-row (or array-column 1))))) | |
501 | (array-normalize-cursor)) | |
502 | ||
503 | (defun array-copy-row-up (&optional arg) | |
504 | "Copy the entire current array row into the row above. | |
505 | If optional ARG is given, copy through ARG rows up." | |
506 | (interactive "p") | |
507 | (array-copy-row-down (- arg))) | |
508 | ||
509 | (defun array-fill-rectangle () | |
510 | "Copy the field at mark into every cell between mark and point." | |
511 | (interactive) | |
512 | ;; Bind arguments. | |
513 | (array-update-buffer-position) | |
514 | (let ((p-row (or (array-current-row) | |
515 | (error "Cursor is not in a valid array cell."))) | |
516 | (p-column (or (array-current-column) | |
517 | (error "Cursor is not in a valid array cell."))) | |
518 | (m-row | |
519 | (save-excursion | |
520 | (exchange-point-and-mark) | |
521 | (array-update-buffer-position) | |
522 | (or (array-current-row) | |
523 | (error "Mark is not in a valid array cell.")))) | |
524 | (m-column | |
525 | (save-excursion | |
526 | (exchange-point-and-mark) | |
527 | (array-update-buffer-position) | |
528 | (or (array-current-column) | |
529 | (error "Mark is not in a valid array cell."))))) | |
530 | (message "Working...") | |
531 | (let ((top-row (min m-row p-row)) | |
532 | (bottom-row (max m-row p-row)) | |
533 | (left-column (min m-column p-column)) | |
534 | (right-column (max m-column p-column))) | |
535 | ;; Do the first row. | |
536 | (let ((copy-string | |
537 | (save-excursion | |
538 | (array-move-to-cell m-row m-column) | |
539 | (array-update-buffer-position) | |
540 | (array-field-string)))) | |
541 | (array-copy-to-cell top-row left-column) | |
542 | (array-update-array-position top-row left-column) | |
543 | (array-update-buffer-position) | |
544 | (array-copy-to-column right-column)) | |
545 | ;; Do the rest of the rows. | |
546 | (array-move-to-cell top-row left-column) | |
547 | (let ((copy-string | |
548 | (buffer-substring | |
549 | (point) | |
550 | (save-excursion | |
551 | (array-move-to-cell top-row right-column) | |
552 | (setq buffer-column (current-column)) | |
553 | (array-end-of-field t) | |
554 | (point)))) | |
555 | (this-row top-row)) | |
556 | (while (/= this-row bottom-row) | |
557 | (setq this-row (1+ this-row)) | |
558 | (array-move-to-cell this-row left-column) | |
559 | (let ((inhibit-quit t)) | |
560 | (delete-region | |
561 | (point) | |
562 | (save-excursion | |
563 | (array-move-to-cell this-row right-column) | |
564 | (setq buffer-column (current-column)) | |
565 | (array-end-of-field t) | |
566 | (point))) | |
567 | (insert copy-string))))) | |
568 | (message "Working...done") | |
569 | (array-goto-cell p-row p-column))) | |
570 | ||
571 | \f | |
572 | ||
573 | ;;; Reconfiguration of the array. | |
574 | ||
575 | (defun array-make-template () | |
576 | "Create the template of an array." | |
577 | (interactive) | |
578 | ;; If there is a conflict between field-width and init-string, resolve it. | |
579 | (let ((check t) | |
580 | (len)) | |
581 | (while check | |
582 | (setq init-field (read-input "Initial field value: ")) | |
583 | (setq len (length init-field)) | |
584 | (if (/= len field-width) | |
585 | (if (y-or-n-p (format "Change field width to %d? " len)) | |
586 | (progn (setq field-width len) | |
587 | (setq check nil))) | |
588 | (setq check nil)))) | |
589 | (goto-char (point-min)) | |
590 | (message "Working...") | |
591 | (let ((this-row 1)) | |
592 | ;; Loop through the rows. | |
593 | (while (<= this-row max-row) | |
594 | (if rows-numbered | |
595 | (insert (format "%d:\n" this-row))) | |
596 | (let ((this-column 1)) | |
597 | ;; Loop through the columns. | |
598 | (while (<= this-column max-column) | |
599 | (insert init-field) | |
600 | (if (and (zerop (% this-column columns-per-line)) | |
601 | (/= this-column max-column)) | |
602 | (newline)) | |
603 | (setq this-column (1+ this-column)))) | |
604 | (setq this-row (1+ this-row)) | |
605 | (newline))) | |
606 | (message "Working...done") | |
607 | (array-goto-cell 1 1)) | |
608 | ||
609 | (defun array-reconfigure-rows (new-columns-per-line new-rows-numbered) | |
610 | "Reconfigure the state of `rows-numbered' and `columns-per-line'. | |
611 | NEW-COLUMNS-PER-LINE is the desired value of `columns-per-line' and | |
612 | NEW-ROWS-NUMBERED (a character, either ?y or ?n) is the desired value | |
613 | of rows-numbered." | |
614 | (interactive "nColumns per line: \ncRows numbered? (y or n) ") | |
615 | ;; Check on new-columns-per-line | |
616 | (let ((check t)) | |
617 | (while check | |
618 | (if (and (>= new-columns-per-line 1) | |
619 | (<= new-columns-per-line max-column)) | |
620 | (setq check nil) | |
621 | (setq new-columns-per-line | |
622 | (string-to-int | |
623 | (read-input | |
624 | (format "Columns per line (1 - %d): " max-column))))))) | |
625 | ;; Check on new-rows-numbered. It has to be done this way | |
626 | ;; because interactive does not have y-or-n-p. | |
627 | (cond | |
628 | ((eq new-rows-numbered ?y) | |
629 | (setq new-rows-numbered t)) | |
630 | ((eq new-rows-numbered ?n) | |
631 | (setq new-rows-numbered nil)) | |
632 | (t | |
633 | (setq new-rows-numbered (y-or-n-p "Rows numbered? ")))) | |
634 | (message "Working...") | |
635 | (array-update-buffer-position) | |
636 | (let* ((main-buffer (buffer-name (current-buffer))) | |
637 | (temp-buffer (make-temp-name "Array")) | |
638 | (temp-max-row max-row) | |
639 | (temp-max-column max-column) | |
640 | (old-rows-numbered rows-numbered) | |
641 | (old-columns-per-line columns-per-line) | |
642 | (old-lines-per-row lines-per-row) | |
643 | (old-field-width field-width) | |
644 | (old-line-length line-length) | |
645 | (this-row 1)) | |
646 | (array-update-array-position) | |
647 | ;; Do the cutting in a temporary buffer. | |
648 | (copy-to-buffer temp-buffer (point-min) (point-max)) | |
649 | (set-buffer temp-buffer) | |
650 | (goto-char (point-min)) | |
651 | (while (<= this-row temp-max-row) | |
652 | ;; Deal with row number. | |
653 | (cond | |
654 | ((or (and old-rows-numbered new-rows-numbered) | |
655 | (and (not old-rows-numbered) (not new-rows-numbered))) | |
656 | ;; Nothing is changed. | |
657 | ()) | |
658 | ((and old-rows-numbered (not new-rows-numbered)) | |
659 | ;; Delete the row number. | |
660 | (kill-line 1)) | |
661 | (t | |
662 | ;; Add the row number. | |
663 | (insert-string (format "%d:\n" this-row)))) | |
664 | ;; Deal with the array columns in this row. | |
665 | (cond | |
666 | ((= old-columns-per-line new-columns-per-line) | |
667 | ;; Nothing is changed. Go to the next row. | |
668 | (forward-line (- old-lines-per-row (if old-rows-numbered 1 0)))) | |
669 | (t | |
670 | ;; First expand the row. Then cut it up into new pieces. | |
671 | (let ((newlines-to-be-removed | |
672 | (floor (1- temp-max-column) old-columns-per-line)) | |
673 | (newlines-removed 0) | |
674 | (newlines-to-be-added | |
675 | (floor (1- temp-max-column) new-columns-per-line)) | |
676 | (newlines-added 0)) | |
677 | (while (< newlines-removed newlines-to-be-removed) | |
678 | (move-to-column-untabify | |
679 | (* (1+ newlines-removed) old-line-length)) | |
680 | (kill-line 1) | |
681 | (setq newlines-removed (1+ newlines-removed))) | |
682 | (beginning-of-line) | |
683 | (while (< newlines-added newlines-to-be-added) | |
684 | (move-to-column-untabify (* old-field-width new-columns-per-line)) | |
685 | (newline) | |
686 | (setq newlines-added (1+ newlines-added))) | |
687 | (forward-line 1)))) | |
688 | (setq this-row (1+ this-row))) | |
689 | (let ((inhibit-quit t)) | |
690 | (set-buffer main-buffer) | |
691 | (erase-buffer) | |
692 | (insert-buffer temp-buffer) | |
693 | ;; Update local variables. | |
694 | (setq columns-per-line new-columns-per-line) | |
695 | (setq rows-numbered new-rows-numbered) | |
696 | (setq line-length (* old-field-width new-columns-per-line)) | |
697 | (setq lines-per-row | |
698 | (+ (ceiling temp-max-column new-columns-per-line) | |
699 | (if new-rows-numbered 1 0))) | |
700 | (array-goto-cell (or array-row 1) (or array-column 1))) | |
701 | (kill-buffer temp-buffer)) | |
702 | (message "Working...done")) | |
703 | ||
704 | (defun array-expand-rows () | |
705 | "Expand the rows so each fits on one line and remove row numbers." | |
706 | (interactive) | |
707 | (array-reconfigure-rows max-column ?n)) | |
708 | ||
709 | \f | |
710 | ||
711 | ;;; Utilities. | |
712 | ||
713 | (defun limit-index (index limit) | |
714 | (cond ((< index 1) 1) | |
715 | ((> index limit) limit) | |
716 | (t index))) | |
717 | ||
718 | (defun abs (int) | |
719 | "Return the absolute value of INT." | |
720 | (if (< int 0) (- int) int)) | |
721 | ||
722 | ||
723 | (defun floor (int1 int2) | |
724 | "Returns the floor of INT1 divided by INT2. | |
725 | INT1 may be negative. INT2 must be positive." | |
726 | (if (< int1 0) | |
727 | (- (ceiling (- int1) int2)) | |
728 | (/ int1 int2))) | |
729 | ||
730 | (defun ceiling (int1 int2) | |
731 | "Returns the ceiling of INT1 divided by INT2. | |
732 | Assumes that both arguments are nonnegative." | |
733 | (+ (/ int1 int2) | |
734 | (if (zerop (mod int1 int2)) | |
735 | 0 | |
736 | 1))) | |
737 | ||
738 | (defun xor (pred1 pred2) | |
739 | "Returns the logical exclusive or of predicates PRED1 and PRED2." | |
740 | (and (or pred1 pred2) | |
741 | (not (and pred1 pred2)))) | |
742 | ||
743 | (defun current-line () | |
744 | "Return the current buffer line at point. The first line is 0." | |
745 | (save-excursion | |
746 | (beginning-of-line) | |
747 | (count-lines (point-min) (point)))) | |
748 | ||
749 | (defun move-to-column-untabify (column) | |
750 | "Move to COLUMN on the current line, untabifying if necessary. | |
751 | Return COLUMN." | |
752 | (or (and (= column (move-to-column column)) | |
753 | column) | |
754 | ;; There is a tab in the way. | |
755 | (if respect-tabs | |
756 | (error "There is a TAB character in the way.") | |
757 | (progn | |
758 | (untabify-backward) | |
759 | (move-to-column column))))) | |
760 | ||
761 | (defun untabify-backward () | |
762 | "Untabify the preceding tab." | |
763 | (save-excursion | |
764 | (let ((start (point))) | |
765 | (backward-char 1) | |
766 | (untabify (point) start)))) | |
767 | ||
768 | \f | |
769 | ||
770 | ;;; Array mode. | |
771 | ||
772 | (defvar array-mode-map nil | |
773 | "Keymap used in array mode.") | |
774 | ||
775 | (if array-mode-map | |
776 | () | |
777 | (setq array-mode-map (make-keymap)) | |
778 | ;; Bind keys. | |
779 | (define-key array-mode-map "\M-ad" 'array-display-local-variables) | |
780 | (define-key array-mode-map "\M-am" 'array-make-template) | |
781 | (define-key array-mode-map "\M-ae" 'array-expand-rows) | |
782 | (define-key array-mode-map "\M-ar" 'array-reconfigure-rows) | |
783 | (define-key array-mode-map "\M-a=" 'array-what-position) | |
784 | (define-key array-mode-map "\M-ag" 'array-goto-cell) | |
785 | (define-key array-mode-map "\M-af" 'array-fill-rectangle) | |
786 | (define-key array-mode-map "\C-n" 'array-next-row) | |
787 | (define-key array-mode-map "\C-p" 'array-previous-row) | |
788 | (define-key array-mode-map "\C-f" 'array-forward-column) | |
789 | (define-key array-mode-map "\C-b" 'array-backward-column) | |
790 | (define-key array-mode-map "\M-n" 'array-copy-down) | |
791 | (define-key array-mode-map "\M-p" 'array-copy-up) | |
792 | (define-key array-mode-map "\M-f" 'array-copy-forward) | |
793 | (define-key array-mode-map "\M-b" 'array-copy-backward) | |
794 | (define-key array-mode-map "\M-\C-n" 'array-copy-row-down) | |
795 | (define-key array-mode-map "\M-\C-p" 'array-copy-row-up) | |
796 | (define-key array-mode-map "\M-\C-f" 'array-copy-column-forward) | |
797 | (define-key array-mode-map "\M-\C-b" 'array-copy-column-backward)) | |
798 | ||
799 | (put 'array-mode 'mode-class 'special) | |
800 | ||
801 | (defun array-mode () | |
802 | "Major mode for editing arrays. | |
803 | ||
804 | Array mode is a specialized mode for editing arrays. An array is | |
805 | considered to be a two-dimensional set of strings. The strings are | |
806 | NOT recognized as integers or real numbers. | |
807 | ||
808 | The array MUST reside at the top of the buffer. | |
809 | ||
810 | TABs are not respected, and may be converted into spaces at any time. | |
811 | Setting the variable 'respect-tabs to non-nil will prevent TAB conversion, | |
812 | but will cause many functions to give errors if they encounter one. | |
813 | ||
814 | Upon entering array mode, you will be prompted for the values of | |
815 | several variables. Others will be calculated based on the values you | |
816 | supply. These variables are all local the the buffer. Other buffer | |
817 | in array mode may have different values assigned to the variables. | |
818 | The variables are: | |
819 | ||
820 | Variables you assign: | |
821 | max-row: The number of rows in the array. | |
822 | max-column: The number of columns in the array. | |
823 | columns-per-line: The number of columns in the array per line of buffer. | |
824 | field-width: The width of each field, in characters. | |
825 | rows-numbered: A logical variable describing whether to ignore | |
826 | row numbers in the buffer. | |
827 | ||
828 | Variables which are calculated: | |
829 | line-length: The number of characters in a buffer line. | |
830 | lines-per-row: The number of buffer lines used to display each row. | |
831 | ||
832 | The following commands are available (an asterisk indicates it may | |
833 | take a numeric prefix argument): | |
834 | ||
835 | * \\<array-mode-map>\\[array-forward-column] Move forward one column. | |
836 | * \\[array-backward-column] Move backward one column. | |
837 | * \\[array-next-row] Move down one row. | |
838 | * \\[array-previous-row] Move up one row. | |
839 | ||
840 | * \\[array-copy-forward] Copy the current field into the column to the right. | |
841 | * \\[array-copy-backward] Copy the current field into the column to the left. | |
842 | * \\[array-copy-down] Copy the current field into the row below. | |
843 | * \\[array-copy-up] Copy the current field into the row above. | |
844 | ||
845 | * \\[array-copy-column-forward] Copy the current column into the column to the right. | |
846 | * \\[array-copy-column-backward] Copy the current column into the column to the left. | |
847 | * \\[array-copy-row-down] Copy the current row into the row below. | |
848 | * \\[array-copy-row-up] Copy the current row into the row above. | |
849 | ||
850 | \\[array-fill-rectangle] Copy the field at mark into every cell with row and column | |
851 | between that of point and mark. | |
852 | ||
853 | \\[array-what-position] Display the current array row and column. | |
854 | \\[array-goto-cell] Go to a particular array cell. | |
855 | ||
856 | \\[array-make-template] Make a template for a new array. | |
857 | \\[array-reconfigure-rows] Reconfigure the array. | |
858 | \\[array-expand-rows] Expand the array (remove row numbers and | |
859 | newlines inside rows) | |
860 | ||
861 | \\[array-display-local-variables] Display the current values of local variables. | |
862 | ||
863 | Entering array mode calls the function `array-mode-hook'." | |
864 | ||
865 | (interactive) | |
866 | ;; Number of rows in the array. | |
867 | (make-local-variable 'max-row) | |
868 | ;; Number of columns in the array. | |
869 | (make-local-variable 'max-column) | |
870 | ;; Number of array columns per line. | |
871 | (make-local-variable 'columns-per-line) | |
872 | ;; Width of a field in the array. | |
873 | (make-local-variable 'field-width) | |
874 | ;; Are rows numbered in the buffer? | |
875 | (make-local-variable 'rows-numbered) | |
876 | ;; Length of a line in the array. | |
877 | (make-local-variable 'line-length) | |
878 | ;; Number of lines per array row. | |
879 | (make-local-variable 'lines-per-row) | |
880 | ;; Current line number of point in the buffer. | |
881 | (make-local-variable 'buffer-line) | |
882 | ;; Current column number of point in the buffer. | |
883 | (make-local-variable 'buffer-column) | |
884 | ;; Current array row location of point. | |
885 | (make-local-variable 'array-row) | |
886 | ;; Current array column location of point. | |
887 | (make-local-variable 'array-column) | |
888 | ;; Current field string being copied. | |
889 | (make-local-variable 'copy-string) | |
890 | ;; Should TAB conversion be prevented? | |
891 | (make-local-variable 'respect-tabs) | |
892 | (setq respect-tabs nil) | |
893 | (array-init-local-variables) | |
894 | (setq major-mode 'array-mode) | |
895 | (setq mode-name "Array") | |
896 | ;; Update mode-line. | |
897 | (progn (save-excursion (set-buffer (other-buffer))) | |
898 | (set-buffer-modified-p (buffer-modified-p)) | |
899 | (sit-for 0)) | |
900 | (make-variable-buffer-local 'truncate-lines) | |
901 | (setq truncate-lines t) | |
902 | (setq overwrite-mode t) | |
903 | (use-local-map array-mode-map) | |
904 | (run-hooks 'array-mode-hook)) | |
905 | ||
906 | \f | |
907 | ||
908 | ;;; Initialization functions. These are not interactive. | |
909 | ||
910 | (defun array-init-local-variables () | |
911 | "Initialize the variables associated with the | |
912 | array in this buffer." | |
913 | (array-init-max-row) | |
914 | (array-init-max-column) | |
915 | (array-init-columns-per-line) | |
916 | (array-init-field-width) | |
917 | (array-init-rows-numbered) | |
918 | (array-init-line-length) | |
919 | (array-init-lines-per-row) | |
920 | (message "")) | |
921 | ||
922 | (defun array-init-max-row (&optional arg) | |
923 | "Initialize the value of max-row." | |
924 | (setq max-row | |
925 | (or arg (string-to-int (read-input "Number of array rows: "))))) | |
926 | ||
927 | (defun array-init-max-column (&optional arg) | |
928 | "Initialize the value of max-column." | |
929 | (setq max-column | |
930 | (or arg (string-to-int (read-input "Number of array columns: "))))) | |
931 | ||
932 | (defun array-init-columns-per-line (&optional arg) | |
933 | "Initialize the value of columns-per-line." | |
934 | (setq columns-per-line | |
935 | (or arg (string-to-int (read-input "Array columns per line: "))))) | |
936 | ||
937 | (defun array-init-field-width (&optional arg) | |
938 | "Initialize the value of field-width." | |
939 | (setq field-width | |
940 | (or arg (string-to-int (read-input "Field width: "))))) | |
941 | ||
942 | (defun array-init-rows-numbered (&optional arg) | |
943 | "Initialize the value of rows-numbered." | |
944 | (setq rows-numbered | |
945 | (or arg (y-or-n-p "Rows numbered? ")))) | |
946 | ||
947 | (defun array-init-line-length (&optional arg) | |
948 | "Initialize the value of line-length." | |
949 | (setq line-length | |
950 | (or arg | |
951 | (* field-width columns-per-line)))) | |
952 | ||
953 | (defun array-init-lines-per-row (&optional arg) | |
954 | "Initialize the value of lines-per-row." | |
955 | (setq lines-per-row | |
956 | (or arg | |
957 | (+ (ceiling max-column columns-per-line) | |
958 | (if rows-numbered 1 0))))) | |
c0274f38 ER |
959 | |
960 | ;;; array.el ends here |