1: ;; This file is part of GNU Emacs.
2: ;; Changes by anton
3: ;; This is a variant of forth.el that came with TILE.
4: ;; I left most of this stuff untouched and made just a few changes for
5: ;; the things I use (mainly indentation and syntax tables).
6: ;; So there is still a lot of work to do to adapt this to gforth.
7:
8: ;; GNU Emacs is distributed in the hope that it will be useful,
9: ;; but WITHOUT ANY WARRANTY. No author or distributor
10: ;; accepts responsibility to anyone for the consequences of using it
11: ;; or for whether it serves any particular purpose or works at all,
12: ;; unless he says so in writing. Refer to the GNU Emacs General Public
13: ;; License for full details.
14:
15: ;; Everyone is granted permission to copy, modify and redistribute
16: ;; GNU Emacs, but only under the conditions described in the
17: ;; GNU Emacs General Public License. A copy of this license is
18: ;; supposed to have been given to you along with GNU Emacs so you
19: ;; can know your rights and responsibilities. It should be in a
20: ;; file named COPYING. Among other things, the copyright notice
21: ;; and this notice must be preserved on all copies.
22:
23: ;;; $Header: /nfs/unsafe/cvs-repository/src-master/gforth/gforth.el,v 1.9 1995/01/12 18:37:53 anton Exp $
24:
25: ;;-------------------------------------------------------------------
26: ;; A Forth indentation, documentation search and interaction library
27: ;;-------------------------------------------------------------------
28: ;;
29: ;; Written by Goran Rydqvist, gorry@ida.liu.se, Summer 1988
30: ;; Started: 16 July 88
31: ;; Version: 2.10
32: ;; Last update: 5 December 1989 by Mikael Patel, mip@ida.liu.se
33: ;; Last update: 25 June 1990 by Goran Rydqvist, gorry@ida.liu.se
34: ;;
35: ;; Documentation: See forth-mode (^HF forth-mode)
36: ;;-------------------------------------------------------------------
37:
38:
39: (defvar forth-positives
40: " : :noname begin do ?do while if ?dup-if ?dup-not-if else case create does> exception> struct [if] [else] "
41: "Contains all words which will cause the indent-level to be incremented
42: on the next line.
43: OBS! All words in forth-positives must be surrounded by spaces.")
44:
45: (defvar forth-negatives
46: " ; until repeat while +loop loop s+loop else then endif again endcase does> end-struct [then] [else] "
47: "Contains all words which will cause the indent-level to be decremented
48: on the current line.
49: OBS! All words in forth-negatives must be surrounded by spaces.")
50:
51: (defvar forth-zeroes
52: " : :noname "
53: "Contains all words which causes the indent to go to zero")
54:
55: (defvar forth-prefixes
56: " postpone [compile] ['] [char] "
57: "words that prefix and escape other words")
58:
59: (defvar forth-mode-abbrev-table nil
60: "Abbrev table in use in Forth-mode buffers.")
61:
62: (define-abbrev-table 'forth-mode-abbrev-table ())
63:
64: (defvar forth-mode-map nil
65: "Keymap used in Forth mode.")
66:
67: (if (not forth-mode-map)
68: (setq forth-mode-map (make-sparse-keymap)))
69:
70: (global-set-key "\e\C-m" 'forth-send-paragraph)
71: (global-set-key "\C-x\C-m" 'forth-split)
72: (global-set-key "\e " 'forth-reload)
73:
74: ;(define-key forth-mode-map "\M-\C-x" 'compile)
75: (define-key forth-mode-map "\C-x\\" 'comment-region)
76: (define-key forth-mode-map "\C-x|" 'uncomment-region)
77: (define-key forth-mode-map "\C-x~" 'forth-remove-tracers)
78: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
79: (define-key forth-mode-map "\eo" 'forth-send-buffer)
80: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
81: (define-key forth-mode-map "\e " 'forth-reload)
82: (define-key forth-mode-map "\t" 'forth-indent-command)
83: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
84: (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
85:
86: (defvar forth-mode-syntax-table nil
87: "Syntax table in use in Forth-mode buffers.")
88:
89: (if (not forth-mode-syntax-table)
90: (progn
91: (setq forth-mode-syntax-table (make-syntax-table))
92: (let ((char 0))
93: (while (< char ?!)
94: (modify-syntax-entry char " " forth-mode-syntax-table)
95: (setq char (1+ char)))
96: (while (< char 256)
97: (modify-syntax-entry char "w" forth-mode-syntax-table)
98: (setq char (1+ char))))
99: (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)
100: (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)
101: (modify-syntax-entry ?\n ">" forth-mode-syntax-table)
102: ))
103: ;I do not define '(' and ')' as comment delimiters, because emacs
104: ;only supports one comment syntax (and a hack to accomodate C++); I
105: ;use '\' for natural language comments and '(' for formal comments
106: ;like stack comments, so for me it's better to have emacs treat '\'
107: ;comments as comments. I you want it different, make the appropriate
108: ;changes (best in your .emacs file).
109: ;
110: ;Hmm, the C++ hack could be used to support both comment syntaxes: we
111: ;can have different comment styles, if both comments start with the
112: ;same character. we could use ' ' as first and '(' and '\' as second
113: ;character. However this would fail for G\ comments.
114:
115: (defconst forth-indent-level 4
116: "Indentation of Forth statements.")
117:
118: (defun forth-mode-variables ()
119: (set-syntax-table forth-mode-syntax-table)
120: (setq local-abbrev-table forth-mode-abbrev-table)
121: (make-local-variable 'paragraph-start)
122: (setq paragraph-start (concat "^$\\|" page-delimiter))
123: (make-local-variable 'paragraph-separate)
124: (setq paragraph-separate paragraph-start)
125: (make-local-variable 'indent-line-function)
126: (setq indent-line-function 'forth-indent-line)
127: ; (make-local-variable 'require-final-newline)
128: ; (setq require-final-newline t)
129: (make-local-variable 'comment-start)
130: (setq comment-start "\\ ")
131: ;(make-local-variable 'comment-end)
132: ;(setq comment-end " )")
133: (make-local-variable 'comment-column)
134: (setq comment-column 40)
135: (make-local-variable 'comment-start-skip)
136: (setq comment-start-skip "\\ ")
137: (make-local-variable 'comment-indent-hook)
138: (setq comment-indent-hook 'forth-comment-indent)
139: (make-local-variable 'parse-sexp-ignore-comments)
140: (setq parse-sexp-ignore-comments t))
141:
142: ;;;###autoload
143: (defun forth-mode ()
144: "
145: Major mode for editing Forth code. Tab indents for Forth code. Comments
146: are delimited with \\ and newline. Paragraphs are separated by blank lines
147: only. Delete converts tabs to spaces as it moves back.
148: \\{forth-mode-map}
149: Forth-split
150: Positions the current buffer on top and a forth-interaction window
151: below. The window size is controlled by the forth-percent-height
152: variable (see below).
153: Forth-reload
154: Reloads the forth library and restarts the forth process.
155: Forth-send-buffer
156: Sends the current buffer, in text representation, as input to the
157: forth process.
158: Forth-send-paragraph
159: Sends the previous or the current paragraph to the forth-process.
160: Note that the cursor only need to be with in the paragraph to be sent.
161: forth-documentation
162: Search for documentation of forward adjacent to cursor. Note! To use
163: this mode you have to add a line, to your .emacs file, defining the
164: directories to search through for documentation files (se variable
165: forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
166:
167: Variables controlling interaction and startup
168: forth-percent-height
169: Tells split how high to make the edit portion, in percent of the
170: current screen height.
171: forth-program-name
172: Tells the library which program name to execute in the interation
173: window.
174:
175: Variables controlling indentation style:
176: forth-positives
177: A string containing all words which causes the indent-level of the
178: following line to be incremented.
179: OBS! Each word must be surronded by spaces.
180: forth-negatives
181: A string containing all words which causes the indentation of the
182: current line to be decremented, if the word begin the line. These
183: words also has a cancelling effect on the indent-level of the
184: following line, independent of position.
185: OBS! Each word must be surronded by spaces.
186: forth-zeroes
187: A string containing all words which causes the indentation of the
188: current line to go to zero, if the word begin the line.
189: OBS! Each word must be surronded by spaces.
190: forth-indent-level
191: Indentation increment/decrement of Forth statements.
192:
193: Note! A word which decrements the indentation of the current line, may
194: also be mentioned in forth-positives to cause the indentation to
195: resume the previous level.
196:
197: Variables controling documentation search
198: forth-help-load-path
199: List of directories to search through to find *.doc
200: (forth-help-file-suffix) files. Nil means current default directory.
201: The specified directories must contain at least one .doc file. If it
202: does not and you still want the load-path to scan that directory, create
203: an empty file dummy.doc.
204: forth-help-file-suffix
205: The file names to search for in each directory specified by
206: forth-help-load-path. Defaulted to '*.doc'.
207: "
208: (interactive)
209: (kill-all-local-variables)
210: (use-local-map forth-mode-map)
211: (setq mode-name "Forth")
212: (setq major-mode 'forth-mode)
213: (forth-mode-variables)
214: ; (if (not (forth-process-running-p))
215: ; (run-forth forth-program-name))
216: (run-hooks 'forth-mode-hook))
217:
218: (setq forth-mode-hook
219: '(lambda ()
220: (make-local-variable 'compile-command)
221: (setq compile-command "gforth ")))
222:
223: (defun forth-fill-paragraph ()
224: "Fill comments (starting with '\'; do not fill code (block style
225: programmers who tend to fill code won't use emacs anyway:-)."
226: ; Currently only comments at the start of the line are filled.
227: ; Something like lisp-fill-paragraph may be better. We cannot use
228: ; fill-paragraph, because it removes the \ from the first comment
229: ; line. Therefore we have to look for the first line of the comment
230: ; and use fill-region.
231: (interactive)
232: (save-excursion
233: (beginning-of-line)
234: (while (and
235: (= (forward-line -1) 0)
236: (looking-at "[ \t]*\\\\[ \t]+")))
237: (if (not (looking-at "[ \t]*\\\\[ \t]+"))
238: (forward-line 1))
239: (let ((from (point))
240: (to (save-excursion (forward-paragraph) (point))))
241: (if (looking-at "[ \t]*\\\\[ \t]+")
242: (progn (goto-char (match-end 0))
243: (set-fill-prefix)
244: (fill-region from to nil))))))
245:
246: (defun forth-comment-indent ()
247: (save-excursion
248: (beginning-of-line)
249: (if (looking-at ":[ \t]*")
250: (progn
251: (end-of-line)
252: (skip-chars-backward " \t\n")
253: (1+ (current-column)))
254: comment-column)))
255:
256: (defun forth-current-indentation ()
257: (save-excursion
258: (beginning-of-line)
259: (back-to-indentation)
260: (current-column)))
261:
262: (defun forth-delete-indentation ()
263: (let ((b nil) (m nil))
264: (save-excursion
265: (beginning-of-line)
266: (setq b (point))
267: (back-to-indentation)
268: (setq m (point)))
269: (delete-region b m)))
270:
271: (defun forth-indent-line (&optional flag)
272: "Correct indentation of the current Forth line."
273: (let ((x (forth-calculate-indent)))
274: (forth-indent-to x)))
275:
276: (defun forth-indent-command ()
277: (interactive)
278: (forth-indent-line t))
279:
280: (defun forth-indent-to (x)
281: (let ((p nil))
282: (setq p (- (current-column) (forth-current-indentation)))
283: (forth-delete-indentation)
284: (beginning-of-line)
285: (indent-to x)
286: (if (> p 0) (forward-char p))))
287:
288: ;;Calculate indent
289: (defun forth-calculate-indent ()
290: (let ((w1 nil) (indent 0) (centre 0))
291: (save-excursion
292: (beginning-of-line)
293: (skip-chars-backward " \t\n")
294: (beginning-of-line)
295: (back-to-indentation)
296: (setq indent (current-column))
297: (setq centre indent)
298: (setq indent (+ indent (forth-sum-line-indentation))))
299: (save-excursion
300: (beginning-of-line)
301: (back-to-indentation)
302: (let ((p (point)))
303: (skip-chars-forward "^ \t\n")
304: (setq w1 (buffer-substring p (point)))))
305: (if (> (- indent centre) forth-indent-level)
306: (setq indent (+ centre forth-indent-level)))
307: (if (> (- centre indent) forth-indent-level)
308: (setq indent (- centre forth-indent-level)))
309: (if (< indent 0) (setq indent 0))
310: (setq indent (- indent
311: (if (string-match
312: (regexp-quote (concat " " w1 " "))
313: forth-negatives)
314: forth-indent-level 0)))
315: (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
316: (setq indent 0))
317: indent))
318:
319: (defun forth-sum-line-indentation ()
320: "Add upp the positive and negative weights of all words on the current line."
321: (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
322: (end-of-line) (setq e (point))
323: (goto-char b)
324: (while (< (point) e)
325: (setq w (forth-next-word))
326: (setq t1 (string-match (regexp-quote (concat " " w " "))
327: forth-positives))
328: (setq t2 (string-match (regexp-quote (concat " " w " "))
329: forth-negatives))
330: (if t1
331: (setq sum (+ sum forth-indent-level)))
332: (if (and t2 (not first))
333: (setq sum (- sum forth-indent-level)))
334: (skip-chars-forward " \t")
335: (setq first nil))
336: sum))
337:
338:
339: (defun forth-next-word ()
340: "Return the next forth-word. Skip anything that the forth-word takes from
341: the input stream (comments, arguments, etc.)"
342: ;actually, it would be better to use commands based on the
343: ;syntax-table or comment-start etc.
344: (let ((w1 nil))
345: (while (not w1)
346: (skip-chars-forward " \t\n")
347: (let ((p (point)))
348: (skip-chars-forward "^ \t\n")
349: (setq w1 (buffer-substring p (point))))
350: (cond ((string-match "\"" w1)
351: (progn
352: (skip-chars-forward "^\"\n")
353: (forward-char)))
354: ((string-match "\\\\" w1)
355: (progn
356: (end-of-line)
357: ))
358: ((or (equal "(" w1) (equal ".(" w1))
359: (progn
360: (skip-chars-forward "^)\n")
361: (forward-char)))
362: ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)
363: (progn (skip-chars-forward " \t\n")
364: (skip-chars-forward "^ \t\n")))
365: (t nil)))
366: w1))
367:
368:
369: ;; Forth commands
370:
371: (defun forth-remove-tracers ()
372: "Remove tracers of the form `~~ '. Queries the user for each occurrence."
373: (interactive)
374: (query-replace "~~ " ""))
375:
376: (defvar forth-program-name "gforth"
377: "*Program invoked by the `run-forth' command.")
378:
379: (defvar forth-band-name nil
380: "*Band loaded by the `run-forth' command.")
381:
382: (defvar forth-program-arguments nil
383: "*Arguments passed to the Forth program by the `run-forth' command.")
384:
385: (defun run-forth (command-line)
386: "Run an inferior Forth process. Output goes to the buffer `*forth*'.
387: With argument, asks for a command line. Split up screen and run forth
388: in the lower portion. The current-buffer when called will stay in the
389: upper portion of the screen, and all other windows are deleted.
390: Call run-forth again to make the *forth* buffer appear in the lower
391: part of the screen."
392: (interactive
393: (list (let ((default
394: (or forth-process-command-line
395: (forth-default-command-line))))
396: (if current-prefix-arg
397: (read-string "Run Forth: " default)
398: default))))
399: (setq forth-process-command-line command-line)
400: (forth-start-process command-line)
401: (forth-split)
402: (forth-set-runlight forth-runlight:input))
403:
404: (defun reset-forth ()
405: "Reset the Forth process."
406: (interactive)
407: (let ((process (get-process forth-program-name)))
408: (cond ((or (not process)
409: (not (eq (process-status process) 'run))
410: (yes-or-no-p
411: "The Forth process is running, are you SURE you want to reset it? "))
412: (message "Resetting Forth process...")
413: (forth-reload)
414: (message "Resetting Forth process...done")))))
415:
416: (defun forth-default-command-line ()
417: (concat forth-program-name " -emacs"
418: (if forth-program-arguments
419: (concat " " forth-program-arguments)
420: "")
421: (if forth-band-name
422: (concat " -band " forth-band-name)
423: "")))
424:
425: ;;;; Internal Variables
426:
427: (defvar forth-process-command-line nil
428: "Command used to start the most recent Forth process.")
429:
430: (defvar forth-previous-send ""
431: "Most recent expression transmitted to the Forth process.")
432:
433: (defvar forth-process-filter-queue '()
434: "Queue used to synchronize filter actions properly.")
435:
436: (defvar forth-prompt "ok"
437: "The current forth prompt string.")
438:
439: (defvar forth-start-hook nil
440: "If non-nil, a procedure to call when the Forth process is started.
441: When called, the current buffer will be the Forth process-buffer.")
442:
443: (defvar forth-signal-death-message nil
444: "If non-nil, causes a message to be generated when the Forth process dies.")
445:
446: (defvar forth-percent-height 50
447: "Tells run-forth how high the upper window should be in percent.")
448:
449: (defconst forth-runlight:input ?I
450: "The character displayed when the Forth process is waiting for input.")
451:
452: (defvar forth-mode-string ""
453: "String displayed in the mode line when the Forth process is running.")
454:
455: ;;;; Evaluation Commands
456:
457: (defun forth-send-string (&rest strings)
458: "Send the string arguments to the Forth process.
459: The strings are concatenated and terminated by a newline."
460: (cond ((forth-process-running-p)
461: (forth-send-string-1 strings))
462: ((yes-or-no-p "The Forth process has died. Reset it? ")
463: (reset-forth)
464: (goto-char (point-max))
465: (forth-send-string-1 strings))))
466:
467: (defun forth-send-string-1 (strings)
468: (let ((string (apply 'concat strings)))
469: (forth-send-string-2 string)))
470:
471: (defun forth-send-string-2 (string)
472: (let ((process (get-process forth-program-name)))
473: (if (not (eq (current-buffer) (get-buffer forth-program-name)))
474: (progn
475: (forth-process-filter-output string)
476: (forth-process-filter:finish)))
477: (send-string process (concat string "\n"))
478: (if (eq (current-buffer) (process-buffer process))
479: (set-marker (process-mark process) (point)))))
480:
481:
482: (defun forth-send-region (start end)
483: "Send the current region to the Forth process.
484: The region is sent terminated by a newline."
485: (interactive "r")
486: (let ((process (get-process forth-program-name)))
487: (if (and process (eq (current-buffer) (process-buffer process)))
488: (progn (goto-char end)
489: (set-marker (process-mark process) end))))
490: (forth-send-string "\n" (buffer-substring start end) "\n"))
491:
492: (defun forth-end-of-paragraph ()
493: (if (looking-at "[\t\n ]+") (skip-chars-backward "\t\n "))
494: (if (not (re-search-forward "\n[ \t]*\n" nil t))
495: (goto-char (point-max))))
496:
497: (defun forth-send-paragraph ()
498: "Send the current or the previous paragraph to the Forth process"
499: (interactive)
500: (let (end)
501: (save-excursion
502: (forth-end-of-paragraph)
503: (skip-chars-backward "\t\n ")
504: (setq end (point))
505: (if (re-search-backward "\n[ \t]*\n" nil t)
506: (setq start (point))
507: (goto-char (point-min)))
508: (skip-chars-forward "\t\n ")
509: (forth-send-region (point) end))))
510:
511: (defun forth-send-buffer ()
512: "Send the current buffer to the Forth process."
513: (interactive)
514: (if (eq (current-buffer) (forth-process-buffer))
515: (error "Not allowed to send this buffer's contents to Forth"))
516: (forth-send-region (point-min) (point-max)))
517:
518:
519: ;;;; Basic Process Control
520:
521: (defun forth-start-process (command-line)
522: (let ((buffer (get-buffer-create "*forth*")))
523: (let ((process (get-buffer-process buffer)))
524: (save-excursion
525: (set-buffer buffer)
526: (progn (if process (delete-process process))
527: (goto-char (point-max))
528: (setq mode-line-process '(": %s"))
529: (add-to-global-mode-string 'forth-mode-string)
530: (setq process
531: (apply 'start-process
532: (cons forth-program-name
533: (cons buffer
534: (forth-parse-command-line
535: command-line)))))
536: (set-marker (process-mark process) (point-max))
537: (forth-process-filter-initialize t)
538: (forth-modeline-initialize)
539: (set-process-sentinel process 'forth-process-sentinel)
540: (set-process-filter process 'forth-process-filter)
541: (run-hooks 'forth-start-hook)))
542: buffer)))
543:
544: (defun forth-parse-command-line (string)
545: (setq string (substitute-in-file-name string))
546: (let ((start 0)
547: (result '()))
548: (while start
549: (let ((index (string-match "[ \t]" string start)))
550: (setq start
551: (cond ((not index)
552: (setq result
553: (cons (substring string start)
554: result))
555: nil)
556: ((= index start)
557: (string-match "[^ \t]" string start))
558: (t
559: (setq result
560: (cons (substring string start index)
561: result))
562: (1+ index))))))
563: (nreverse result)))
564:
565:
566: (defun forth-process-running-p ()
567: "True iff there is a Forth process whose status is `run'."
568: (let ((process (get-process forth-program-name)))
569: (and process
570: (eq (process-status process) 'run))))
571:
572: (defun forth-process-buffer ()
573: (let ((process (get-process forth-program-name)))
574: (and process (process-buffer process))))
575:
576: ;;;; Process Filter
577:
578: (defun forth-process-sentinel (proc reason)
579: (let ((inhibit-quit nil))
580: (forth-process-filter-initialize (eq reason 'run))
581: (if (eq reason 'run)
582: (forth-modeline-initialize)
583: (setq forth-mode-string "")))
584: (if (and (not (memq reason '(run stop)))
585: forth-signal-death-message)
586: (progn (beep)
587: (message
588: "The Forth process has died! Do M-x reset-forth to restart it"))))
589:
590: (defun forth-process-filter-initialize (running-p)
591: (setq forth-process-filter-queue (cons '() '()))
592: (setq forth-prompt "ok"))
593:
594:
595: (defun forth-process-filter (proc string)
596: (forth-process-filter-output string)
597: (forth-process-filter:finish))
598:
599: (defun forth-process-filter:enqueue (action)
600: (let ((next (cons action '())))
601: (if (cdr forth-process-filter-queue)
602: (setcdr (cdr forth-process-filter-queue) next)
603: (setcar forth-process-filter-queue next))
604: (setcdr forth-process-filter-queue next)))
605:
606: (defun forth-process-filter:finish ()
607: (while (car forth-process-filter-queue)
608: (let ((next (car forth-process-filter-queue)))
609: (setcar forth-process-filter-queue (cdr next))
610: (if (not (cdr next))
611: (setcdr forth-process-filter-queue '()))
612: (apply (car (car next)) (cdr (car next))))))
613:
614: ;;;; Process Filter Output
615:
616: (defun forth-process-filter-output (&rest args)
617: (if (not (and args
618: (null (cdr args))
619: (stringp (car args))
620: (string-equal "" (car args))))
621: (forth-process-filter:enqueue
622: (cons 'forth-process-filter-output-1 args))))
623:
624: (defun forth-process-filter-output-1 (&rest args)
625: (save-excursion
626: (forth-goto-output-point)
627: (apply 'insert-before-markers args)))
628:
629: (defun forth-guarantee-newlines (n)
630: (save-excursion
631: (forth-goto-output-point)
632: (let ((stop nil))
633: (while (and (not stop)
634: (bolp))
635: (setq n (1- n))
636: (if (bobp)
637: (setq stop t)
638: (backward-char))))
639: (forth-goto-output-point)
640: (while (> n 0)
641: (insert-before-markers ?\n)
642: (setq n (1- n)))))
643:
644: (defun forth-goto-output-point ()
645: (let ((process (get-process forth-program-name)))
646: (set-buffer (process-buffer process))
647: (goto-char (process-mark process))))
648:
649: (defun forth-modeline-initialize ()
650: (setq forth-mode-string " "))
651:
652: (defun forth-set-runlight (runlight)
653: (aset forth-mode-string 0 runlight)
654: (forth-modeline-redisplay))
655:
656: (defun forth-modeline-redisplay ()
657: (save-excursion (set-buffer (other-buffer)))
658: (set-buffer-modified-p (buffer-modified-p))
659: (sit-for 0))
660:
661: ;;;; Process Filter Operations
662:
663: (defun add-to-global-mode-string (x)
664: (cond ((null global-mode-string)
665: (setq global-mode-string (list "" x " ")))
666: ((not (memq x global-mode-string))
667: (setq global-mode-string
668: (cons ""
669: (cons x
670: (cons " "
671: (if (equal "" (car global-mode-string))
672: (cdr global-mode-string)
673: global-mode-string))))))))
674:
675:
676: ;; Misc
677:
678: (setq auto-mode-alist (append auto-mode-alist
679: '(("\\.fs$" . forth-mode))))
680:
681: (defun forth-split ()
682: (interactive)
683: (forth-split-1 "*forth*"))
684:
685: (defun forth-split-1 (buffer)
686: (if (not (eq (window-buffer) (get-buffer buffer)))
687: (progn
688: (delete-other-windows)
689: (split-window-vertically
690: (/ (* (screen-height) forth-percent-height) 100))
691: (other-window 1)
692: (switch-to-buffer buffer)
693: (goto-char (point-max))
694: (other-window 1))))
695:
696: (defun forth-reload ()
697: (interactive)
698: (let ((process (get-process forth-program-name)))
699: (if process (kill-process process t)))
700: (sleep-for-millisecs 100)
701: (forth-mode))
702:
703:
704: ;; Special section for forth-help
705:
706: (defvar forth-help-buffer "*Forth-help*"
707: "Buffer used to display the requested documentation.")
708:
709: (defvar forth-help-load-path nil
710: "List of directories to search through to find *.doc
711: (forth-help-file-suffix) files. Nil means current default directory.
712: The specified directories must contain at least one .doc file. If it
713: does not and you still want the load-path to scan that directory, create
714: an empty file dummy.doc.")
715:
716: (defvar forth-help-file-suffix "*.doc"
717: "The file names to search for in each directory.")
718:
719: (setq forth-search-command-prefix "grep -n \"^ [^(]* ")
720: (defvar forth-search-command-suffix "/dev/null")
721: (defvar forth-grep-error-regexp ": No such file or directory")
722:
723: (defun forth-function-called-at-point ()
724: "Return the space delimited word a point."
725: (save-excursion
726: (save-restriction
727: (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
728: (skip-chars-backward "^ \t\n" (point-min))
729: (if (looking-at "[ \t\n]")
730: (forward-char 1))
731: (let (obj (p (point)))
732: (skip-chars-forward "^ \t\n")
733: (buffer-substring p (point))))))
734:
735: (defun forth-help-names-extend-comp (path-list result)
736: (cond ((null path-list) result)
737: ((null (car path-list))
738: (forth-help-names-extend-comp (cdr path-list)
739: (concat result forth-help-file-suffix " ")))
740: (t (forth-help-names-extend-comp
741: (cdr path-list) (concat result
742: (expand-file-name (car path-list)) "/"
743: forth-help-file-suffix " ")))))
744:
745: (defun forth-help-names-extended ()
746: (if forth-help-load-path
747: (forth-help-names-extend-comp forth-help-load-path "")
748: (error "forth-help-load-path not specified")))
749:
750:
751: ;(define-key forth-mode-map "\C-hf" 'forth-documentation)
752:
753: (defun forth-documentation (function)
754: "Display the full documentation of FORTH word."
755: (interactive
756: (let ((fn (forth-function-called-at-point))
757: (enable-recursive-minibuffers t)
758: search-list
759: val)
760: (setq val (read-string (format "Describe forth word (default %s): " fn)))
761: (list (if (equal val "") fn val))))
762: (forth-get-doc (concat forth-search-command-prefix
763: (grep-regexp-quote (concat function " ("))
764: "[^)]*\-\-\" " (forth-help-names-extended)
765: forth-search-command-suffix))
766: (message "C-x C-m switches back to the forth interaction window"))
767:
768: (defun forth-get-doc (command)
769: "Display the full documentation of command."
770: (let ((curwin (get-buffer-window (window-buffer)))
771: reswin
772: pointmax)
773: (with-output-to-temp-buffer forth-help-buffer
774: (progn
775: (call-process "sh" nil forth-help-buffer t "-c" command)
776: (setq reswin (get-buffer-window forth-help-buffer))))
777: (setq reswin (get-buffer-window forth-help-buffer))
778: (select-window reswin)
779: (save-excursion
780: (goto-char (setq pointmax (point-max)))
781: (insert "--------------------\n\n"))
782: (let (fd doc)
783: (while (setq fd (forth-get-file-data pointmax))
784: (setq doc (forth-get-doc-string fd))
785: (save-excursion
786: (goto-char (point-max))
787: (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
788: ":\n\n" doc "\n")))
789: (if (not doc)
790: (progn (goto-char (point-max)) (insert "Not found"))))
791: (select-window curwin)))
792:
793: (defun forth-skip-error-lines ()
794: (let ((lines 0))
795: (save-excursion
796: (while (re-search-forward forth-grep-error-regexp nil t)
797: (beginning-of-line)
798: (forward-line 1)
799: (setq lines (1+ lines))))
800: (forward-line lines)))
801:
802: (defun forth-get-doc-string (fd)
803: "Find file (car fd) and extract documentation from line (nth 1 fd)."
804: (let (result)
805: (save-window-excursion
806: (find-file (car fd))
807: (goto-line (nth 1 fd))
808: (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
809: (error "forth-get-doc-string: serious error"))
810: (if (not (re-search-backward "\n[\t ]*\n" nil t))
811: (goto-char (point-min))
812: (goto-char (match-end 0)))
813: (let ((p (point)))
814: (if (not (re-search-forward "\n[\t ]*\n" nil t))
815: (goto-char (point-max)))
816: (setq result (buffer-substring p (point))))
817: (bury-buffer (current-buffer)))
818: result))
819:
820: (defun forth-get-file-data (limit)
821: "Parse grep output and return '(filename line#) list. Return nil when
822: passing limit."
823: (forth-skip-error-lines)
824: (if (< (point) limit)
825: (let ((result (forth-get-file-data-cont limit)))
826: (forward-line 1)
827: (beginning-of-line)
828: result)))
829:
830: (defun forth-get-file-data-cont (limit)
831: (let (result)
832: (let ((p (point)))
833: (skip-chars-forward "^:")
834: (setq result (buffer-substring p (point))))
835: (if (< (point) limit)
836: (let ((p (1+ (point))))
837: (forward-char 1)
838: (skip-chars-forward "^:")
839: (list result (string-to-int (buffer-substring p (point))))))))
840:
841: (defun grep-regexp-quote (str)
842: (let ((i 0) (m 1) (res ""))
843: (while (/= m 0)
844: (setq m (string-to-char (substring str i)))
845: (if (/= m 0)
846: (progn
847: (setq i (1+ i))
848: (if (string-match (regexp-quote (char-to-string m))
849: ".*\\^$[]")
850: (setq res (concat res "\\")))
851: (setq res (concat res (char-to-string m))))))
852: res))
853:
854:
855: (define-key forth-mode-map "\C-x\C-e" 'compile)
856: (define-key forth-mode-map "\C-x\C-n" 'next-error)
857: (require 'compile "compile")
858:
859: (defvar forth-compile-command "gforth ")
860: ;(defvar forth-compilation-window-percent-height 30)
861:
862: (defun forth-compile (command)
863: (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
864: (forth-split-1 "*compilation*")
865: (setq ctools-compile-command command)
866: (compile1 ctools-compile-command "No more errors"))
867:
868:
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