File:  [gforth] / gforth / gforth.el
Revision 1.39: download - view: text, annotated - select for diffs
Sun Apr 9 20:57:25 2000 UTC (21 years, 5 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Improved color highlighting
Install new files, too
Some corrections to httpd

    1: ;; Forth mode for Emacs
    2: 
    3: ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
    4: 
    5: ;; This file is part of Gforth.
    6: 
    7: ;; GForth is distributed in the hope that it will be useful,
    8: ;; but WITHOUT ANY WARRANTY.  No author or distributor
    9: ;; accepts responsibility to anyone for the consequences of using it
   10: ;; or for whether it serves any particular purpose or works at all,
   11: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
   12: ;; License for full details.
   13: 
   14: ;; Everyone is granted permission to copy, modify and redistribute
   15: ;; GNU Emacs, but only under the conditions described in the
   16: ;; GNU Emacs General Public License.   A copy of this license is
   17: ;; supposed to have been given to you along with Gforth so you
   18: ;; can know your rights and responsibilities.  It should be in a
   19: ;; file named COPYING.  Among other things, the copyright notice
   20: ;; and this notice must be preserved on all copies.
   21: 
   22: ;; Changes by anton
   23: ;; This is a variant of forth.el that came with TILE.
   24: ;; I left most of this stuff untouched and made just a few changes for 
   25: ;; the things I use (mainly indentation and syntax tables).
   26: ;; So there is still a lot of work to do to adapt this to gforth.
   27: 
   28: ;;-------------------------------------------------------------------
   29: ;; A Forth indentation, documentation search and interaction library
   30: ;;-------------------------------------------------------------------
   31: ;;
   32: ;; Written by Goran Rydqvist, gorry@ida.liu.se, Summer 1988
   33: ;; Started:	16 July 88
   34: ;; Version:	2.10
   35: ;; Last update:	5 December 1989 by Mikael Patel, mip@ida.liu.se
   36: ;; Last update:	25 June 1990 by Goran Rydqvist, gorry@ida.liu.se
   37: ;;
   38: ;; Documentation: See forth-mode (^HF forth-mode)
   39: ;;-------------------------------------------------------------------
   40: 
   41: 
   42: (defvar forth-positives
   43:   " : :noname m: :m code interpretation: ;code does> begin do ?do +do -do u+do u-do while if ?dup-if ?dup-0=-if else case of struct [if] [ifdef] [ifundef] [else] with public: private: class try recover "
   44:   "*Contains all words which will cause the indent-level to be incremented
   45: on the next line.
   46: OBS! All words in forth-positives must be surrounded by spaces.")
   47: 
   48: (defvar forth-negatives
   49:   " ; ;m end-code ;code does> until repeat while +loop loop -loop s+loop else then endif again endcase endof end-struct [then] [else] [endif] endwith end-class class; how: recover endtry "
   50:   "*Contains all words which will cause the indent-level to be decremented
   51: on the current line.
   52: OBS! All words in forth-negatives must be surrounded by spaces.")
   53: 
   54: (defvar forth-zeroes
   55:   " : :noname code interpretation: public: private: how: implements class class; "
   56:   "*Contains all words which causes the indent to go to zero")
   57: 
   58: (setq forth-zero 0)
   59: 
   60: (defvar forth-zup
   61:   " how: implements "
   62:   "Contains all words which causes zero indent level to change")
   63: 
   64: (defvar forth-zdown
   65:   " class; how: class public: private: "
   66:   "Contains all words which causes zero indent level to change")
   67: 
   68: (defvar forth-prefixes
   69:   " postpone [compile] ['] [char] "
   70:   "words that prefix and escape other words")
   71: 
   72: (defvar forth-mode-abbrev-table nil
   73:   "Abbrev table in use in Forth-mode buffers.")
   74: 
   75: (define-abbrev-table 'forth-mode-abbrev-table ())
   76: 
   77: (defvar forth-mode-map nil
   78:   "Keymap used in Forth mode.")
   79: 
   80: (if (not forth-mode-map)
   81:     (setq forth-mode-map (make-sparse-keymap)))
   82: 
   83: ;(define-key forth-mode-map "\M-\C-x" 'compile)
   84: (define-key forth-mode-map "\C-x\\" 'comment-region)
   85: (define-key forth-mode-map "\C-x~" 'forth-remove-tracers)
   86: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
   87: (define-key forth-mode-map "\eo" 'forth-send-buffer)
   88: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
   89: (define-key forth-mode-map "\e " 'forth-reload)
   90: (define-key forth-mode-map "\t" 'forth-indent-command)
   91: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
   92: (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
   93: (define-key forth-mode-map "\e." 'forth-find-tag)
   94: 
   95: ;setup for C-h C-i to work
   96: (if (fboundp 'info-lookup-add-help)
   97:     (info-lookup-add-help
   98:      :topic 'symbol
   99:      :mode 'forth-mode
  100:      :regexp "[^ 	
  101: ]+"
  102:      :ignore-case t
  103:      :doc-spec '(("(gforth)Name Index" nil "`" "'  "))))
  104: 
  105: (load "etags")
  106: 
  107: (defun forth-find-tag (tagname &optional next-p regexp-p)
  108:   (interactive (find-tag-interactive "Find tag: "))
  109:   (switch-to-buffer
  110:    (find-tag-noselect (concat " " tagname " ") next-p regexp-p)))
  111: 
  112: (defvar forth-mode-syntax-table nil
  113:   "Syntax table in use in Forth-mode buffers.")
  114: 
  115: (if (not forth-mode-syntax-table)
  116:     (progn
  117:       (setq forth-mode-syntax-table (make-syntax-table))
  118:       (let ((char 0))
  119: 	(while (< char ?!)
  120: 	  (modify-syntax-entry char " " forth-mode-syntax-table)
  121: 	  (setq char (1+ char)))
  122: 	(while (< char 256)
  123: 	  (modify-syntax-entry char "w" forth-mode-syntax-table)
  124: 	  (setq char (1+ char))))
  125:       (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)
  126:       (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)
  127:       (modify-syntax-entry ?\n ">" forth-mode-syntax-table)
  128:       ))
  129: ;I do not define '(' and ')' as comment delimiters, because emacs
  130: ;only supports one comment syntax (and a hack to accomodate C++); I
  131: ;use '\' for natural language comments and '(' for formal comments
  132: ;like stack comments, so for me it's better to have emacs treat '\'
  133: ;comments as comments. If you want it different, make the appropriate
  134: ;changes (best in your .emacs file).
  135: ;
  136: ;Hmm, the C++ hack could be used to support both comment syntaxes: we
  137: ;can have different comment styles, if both comments start with the
  138: ;same character. we could use ' ' as first and '(' and '\' as second
  139: ;character. However this would fail for G\ comments.
  140: 
  141: (defconst forth-indent-level 4
  142:   "Indentation of Forth statements.")
  143: 
  144: (defun forth-mode-variables ()
  145:   (set-syntax-table forth-mode-syntax-table)
  146:   (setq local-abbrev-table forth-mode-abbrev-table)
  147:   (make-local-variable 'paragraph-start)
  148:   (setq paragraph-start (concat "^$\\|" page-delimiter))
  149:   (make-local-variable 'paragraph-separate)
  150:   (setq paragraph-separate paragraph-start)
  151:   (make-local-variable 'indent-line-function)
  152:   (setq indent-line-function 'forth-indent-line)
  153: ;  (make-local-variable 'require-final-newline)
  154: ;  (setq require-final-newline t)
  155:   (make-local-variable 'comment-start)
  156:   (setq comment-start "\\ ")
  157:   ;(make-local-variable 'comment-end)
  158:   ;(setq comment-end " )")
  159:   (make-local-variable 'comment-column)
  160:   (setq comment-column 40)
  161:   (make-local-variable 'comment-start-skip)
  162:   (setq comment-start-skip "\\ ")
  163:   (make-local-variable 'comment-indent-hook)
  164:   (setq comment-indent-hook 'forth-comment-indent)
  165:   (make-local-variable 'parse-sexp-ignore-comments)
  166:   (setq parse-sexp-ignore-comments t))
  167:   
  168: ;;;###autoload
  169: (defun forth-mode ()
  170:   "
  171: Major mode for editing Forth code. Tab indents for Forth code. Comments
  172: are delimited with \\ and newline. Paragraphs are separated by blank lines
  173: only.
  174: \\{forth-mode-map}
  175:  Forth-split
  176:     Positions the current buffer on top and a forth-interaction window
  177:     below. The window size is controlled by the forth-percent-height
  178:     variable (see below).
  179:  Forth-reload
  180:     Reloads the forth library and restarts the forth process.
  181:  Forth-send-buffer
  182:     Sends the current buffer, in text representation, as input to the
  183:     forth process.
  184:  Forth-send-paragraph
  185:     Sends the previous or the current paragraph to the forth-process.
  186:     Note that the cursor only need to be with in the paragraph to be sent.
  187: forth-documentation
  188:     Search for documentation of forward adjacent to cursor. Note! To use
  189:     this mode you have to add a line, to your .emacs file, defining the
  190:     directories to search through for documentation files (se variable
  191:     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
  192: 
  193: Variables controlling interaction and startup
  194:  forth-percent-height
  195:     Tells split how high to make the edit portion, in percent of the
  196:     current screen height.
  197:  forth-program-name
  198:     Tells the library which program name to execute in the interation
  199:     window.
  200: 
  201: Variables controlling indentation style:
  202:  forth-positives
  203:     A string containing all words which causes the indent-level of the
  204:     following line to be incremented.
  205:     OBS! Each word must be surronded by spaces.
  206:  forth-negatives
  207:     A string containing all words which causes the indentation of the
  208:     current line to be decremented, if the word begin the line. These
  209:     words also has a cancelling effect on the indent-level of the
  210:     following line, independent of position.
  211:     OBS! Each word must be surronded by spaces.
  212:  forth-zeroes
  213:     A string containing all words which causes the indentation of the
  214:     current line to go to zero, if the word begin the line.
  215:     OBS! Each word must be surronded by spaces.
  216:  forth-indent-level
  217:     Indentation increment/decrement of Forth statements.
  218: 
  219:  Note! A word which decrements the indentation of the current line, may
  220:     also be mentioned in forth-positives to cause the indentation to
  221:     resume the previous level.
  222: 
  223: Variables controling documentation search
  224:  forth-help-load-path
  225:     List of directories to search through to find *.doc
  226:     (forth-help-file-suffix) files. Nil means current default directory.
  227:     The specified directories must contain at least one .doc file. If it
  228:     does not and you still want the load-path to scan that directory, create
  229:     an empty file dummy.doc.
  230:  forth-help-file-suffix
  231:     The file names to search for in each directory specified by
  232:     forth-help-load-path. Defaulted to '*.doc'. 
  233: "
  234:   (interactive)
  235:   (kill-all-local-variables)
  236:   (use-local-map forth-mode-map)
  237:   (setq mode-name "Forth")
  238:   (setq major-mode 'forth-mode)
  239:   (forth-mode-variables)
  240: ;  (if (not (forth-process-running-p))
  241: ;      (run-forth forth-program-name))
  242:   (run-hooks 'forth-mode-hook))
  243: 
  244: (setq forth-mode-hook
  245:       '(lambda () 
  246: 	 (make-local-variable 'compile-command)
  247: 	 (setq compile-command "gforth ")))
  248: 
  249: (defun forth-fill-paragraph () 
  250:   "Fill comments (starting with '\'; do not fill code (block style
  251: programmers who tend to fill code won't use emacs anyway:-)."
  252:   ; Currently only comments at the start of the line are filled.
  253:   ; Something like lisp-fill-paragraph may be better.  We cannot use
  254:   ; fill-paragraph, because it removes the \ from the first comment
  255:   ; line. Therefore we have to look for the first line of the comment
  256:   ; and use fill-region.
  257:   (interactive)
  258:   (save-excursion
  259:     (beginning-of-line)
  260:     (while (and
  261: 	     (= (forward-line -1) 0)
  262: 	     (looking-at "[ \t]*\\\\g?[ \t]+")))
  263:     (if (not (looking-at "[ \t]*\\\\g?[ \t]+"))
  264: 	(forward-line 1))
  265:     (let ((from (point))
  266: 	  (to (save-excursion (forward-paragraph) (point))))
  267:       (if (looking-at "[ \t]*\\\\g?[ \t]+")
  268: 	  (progn (goto-char (match-end 0))
  269: 		 (set-fill-prefix)
  270: 		 (fill-region from to nil))))))
  271: 
  272: (defun forth-comment-indent ()
  273:   (save-excursion
  274:     (beginning-of-line)
  275:     (if (looking-at ":[ \t]*")
  276: 	(progn
  277: 	  (end-of-line)
  278: 	  (skip-chars-backward " \t\n")
  279: 	  (1+ (current-column)))
  280:       comment-column)))
  281: 
  282: (defun forth-current-indentation ()
  283:   (save-excursion
  284:     (beginning-of-line)
  285:     (back-to-indentation)
  286:     (current-column)))
  287: 
  288: (defun forth-delete-indentation ()
  289:   (let ((b nil) (m nil))
  290:     (save-excursion
  291:       (beginning-of-line)
  292:       (setq b (point))
  293:       (back-to-indentation)
  294:       (setq m (point)))
  295:     (delete-region b m)))
  296: 
  297: (defun forth-indent-line (&optional flag)
  298:   "Correct indentation of the current Forth line."
  299:   (let ((x (forth-calculate-indent)))
  300:     (forth-indent-to x)))
  301:   
  302: (defun forth-indent-command ()
  303:   (interactive)
  304:   (forth-indent-line t))
  305: 
  306: (defun forth-indent-to (x)
  307:   (let ((p nil))
  308:     (setq p (- (current-column) (forth-current-indentation)))
  309:     (forth-delete-indentation)
  310:     (beginning-of-line)
  311:     (indent-to x)
  312:     (if (> p 0) (forward-char p))))
  313: 
  314: ;;Calculate indent
  315: (defun forth-calculate-indent ()
  316:   (let ((w1 nil) (indent 0) (centre 0))
  317:     (save-excursion
  318:       (beginning-of-line)
  319:       (skip-chars-backward " \t\n")
  320:       (beginning-of-line)
  321:       (back-to-indentation)
  322:       (setq indent (current-column))
  323:       (setq centre indent)
  324:       (setq indent (+ indent (forth-sum-line-indentation))))
  325:     (save-excursion
  326:       (beginning-of-line)
  327:       (back-to-indentation)
  328:       (let ((p (point)))
  329: 	(skip-chars-forward "^ \t\n")
  330: 	(setq w1 (buffer-substring p (point)))))
  331:     (if (> (- indent centre) forth-indent-level)
  332: 	(setq indent (+ centre forth-indent-level)))
  333:     (if (> (- centre indent) forth-indent-level)
  334: 	(setq indent (- centre forth-indent-level)))
  335:     (if (< indent 0) (setq indent 0))
  336:     (setq indent (- indent
  337: 		    (if (string-match 
  338: 			 (regexp-quote (concat " " w1 " "))
  339: 			 forth-negatives)
  340: 			forth-indent-level 0)))
  341:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zdown)
  342: 	(setq forth-zero 0))
  343:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
  344: 	(setq indent forth-zero))
  345:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zup)
  346: 	(setq forth-zero 4))
  347:     indent))
  348: 
  349: (defun forth-sum-line-indentation ()
  350:   "Add upp the positive and negative weights of all words on the current line."
  351:   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
  352:     (end-of-line) (setq e (point))
  353:     (goto-char b)
  354:     (while (< (point) e)
  355:       (setq w (forth-next-word))
  356:       (setq t1 (string-match (regexp-quote (concat " " w " "))
  357: 			     forth-positives))
  358:       (setq t2 (string-match (regexp-quote (concat " " w " "))
  359: 			     forth-negatives))
  360:       (if t1
  361: 	  (setq sum (+ sum forth-indent-level)))
  362:       (if (and t2 (not first))
  363: 	  (setq sum (- sum forth-indent-level)))
  364:       (skip-chars-forward " \t")
  365:       (setq first nil))
  366:     sum))
  367: 
  368: 
  369: (defun forth-next-word ()
  370:   "Return the next forth-word. Skip anything that the forth-word takes from
  371: the input stream (comments, arguments, etc.)"
  372: ;actually, it would be better to use commands based on the
  373: ;syntax-table or comment-start etc.
  374:   (let ((w1 nil))
  375:     (while (not w1)
  376:       (skip-chars-forward " \t\n")
  377:       (let ((p (point)))
  378: 	(skip-chars-forward "^ \t\n")
  379: 	(setq w1 (buffer-substring p (point))))
  380:       (cond ((string-match "\"" w1)
  381: 	     (progn
  382: 	       (skip-chars-forward "^\"\n")
  383: 	       (forward-char)))
  384: 	    ((string-match "\\\\" w1)
  385: 	     (progn
  386: 	       (end-of-line)
  387: 	       ))
  388: 	    ((or (equal "(" w1) (equal ".(" w1))
  389: 	     (progn
  390: 	       (skip-chars-forward "^)\n")
  391: 	       (forward-char)))
  392: 	    ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)
  393: 	     (progn (skip-chars-forward " \t\n")
  394: 		    (skip-chars-forward "^ \t\n")))
  395: 	    (t nil)))
  396:     w1))
  397:       
  398: 
  399: ;; Forth commands
  400: 
  401: (defun forth-remove-tracers ()
  402:   "Remove tracers of the form `~~ '. Queries the user for each occurrence."
  403:   (interactive)
  404:   (query-replace-regexp "\\(~~ \\| ~~$\\)" "" nil))
  405: 
  406: (defvar forth-program-name "gforth"
  407:   "*Program invoked by the `run-forth' command.")
  408: 
  409: (defvar forth-band-name nil
  410:   "*Band loaded by the `run-forth' command.")
  411: 
  412: (defvar forth-program-arguments nil
  413:   "*Arguments passed to the Forth program by the `run-forth' command.")
  414: 
  415: (defun run-forth (command-line)
  416:   "Run an inferior Forth process. Output goes to the buffer `*forth*'.
  417: With argument, asks for a command line. Split up screen and run forth 
  418: in the lower portion. The current-buffer when called will stay in the
  419: upper portion of the screen, and all other windows are deleted.
  420: Call run-forth again to make the *forth* buffer appear in the lower
  421: part of the screen."
  422:   (interactive
  423:    (list (let ((default
  424: 		 (or forth-process-command-line
  425: 		     (forth-default-command-line))))
  426: 	   (if current-prefix-arg
  427: 	       (read-string "Run Forth: " default)
  428: 	       default))))
  429:   (setq forth-process-command-line command-line)
  430:   (forth-start-process command-line)
  431:   (forth-split)
  432:   (forth-set-runlight forth-runlight:input))
  433: 
  434: (defun run-forth-if-not ()
  435:   (if (not (forth-process-running-p))
  436:       (run-forth forth-program-name)))
  437: 
  438: (defun reset-forth ()
  439:   "Reset the Forth process."
  440:   (interactive)
  441:   (let ((process (get-process forth-program-name)))
  442:     (cond ((or (not process)
  443: 	       (not (eq (process-status process) 'run))
  444: 	       (yes-or-no-p
  445: "The Forth process is running, are you SURE you want to reset it? "))
  446: 	   (message "Resetting Forth process...")
  447: 	   (forth-reload)
  448: 	   (message "Resetting Forth process...done")))))
  449: 
  450: (defun forth-default-command-line ()
  451:   (concat forth-program-name
  452: 	  (if forth-program-arguments
  453: 	      (concat " " forth-program-arguments)
  454: 	      "")))
  455: 
  456: ;;;; Internal Variables
  457: 
  458: (defvar forth-process-command-line nil
  459:   "Command used to start the most recent Forth process.")
  460: 
  461: (defvar forth-previous-send ""
  462:   "Most recent expression transmitted to the Forth process.")
  463: 
  464: (defvar forth-process-filter-queue '()
  465:   "Queue used to synchronize filter actions properly.")
  466: 
  467: (defvar forth-prompt "ok"
  468:   "The current forth prompt string.")
  469: 
  470: (defvar forth-start-hook nil
  471:   "If non-nil, a procedure to call when the Forth process is started.
  472: When called, the current buffer will be the Forth process-buffer.")
  473: 
  474: (defvar forth-signal-death-message nil
  475:   "If non-nil, causes a message to be generated when the Forth process dies.")
  476: 
  477: (defvar forth-percent-height 50
  478:   "Tells run-forth how high the upper window should be in percent.")
  479: 
  480: (defconst forth-runlight:input ?I
  481:   "The character displayed when the Forth process is waiting for input.")
  482: 
  483: (defvar forth-mode-string ""
  484:   "String displayed in the mode line when the Forth process is running.")
  485: 
  486: ;;;; Evaluation Commands
  487: 
  488: (defun forth-send-string (&rest strings)
  489:   "Send the string arguments to the Forth process.
  490: The strings are concatenated and terminated by a newline."
  491:   (cond ((forth-process-running-p)
  492: 	 (forth-send-string-1 strings))
  493: 	((yes-or-no-p "The Forth process has died.  Reset it? ")
  494: 	 (reset-forth)
  495: 	 (goto-char (point-max))
  496: 	 (forth-send-string-1 strings))))
  497: 
  498: (defun forth-send-string-1 (strings)
  499:   (let ((string (apply 'concat strings)))
  500:     (forth-send-string-2 string)))
  501: 
  502: (defun forth-send-string-2 (string)
  503:   (let ((process (get-process forth-program-name)))
  504:     (if (not (eq (current-buffer) (get-buffer forth-program-name)))
  505: 	(progn
  506: 	 (forth-process-filter-output string)
  507: 	 (forth-process-filter:finish)))
  508:     (send-string process (concat string "\n"))
  509:     (if (eq (current-buffer) (process-buffer process))
  510: 	(set-marker (process-mark process) (point)))))
  511: 
  512: 
  513: (defun forth-send-region (start end)
  514:   "Send the current region to the Forth process.
  515: The region is sent terminated by a newline."
  516:   (interactive "r")
  517:   (let ((process (get-process forth-program-name)))
  518:     (if (and process (eq (current-buffer) (process-buffer process)))
  519: 	(progn (goto-char end)
  520: 	       (set-marker (process-mark process) end))))
  521:   (forth-send-string "\n" (buffer-substring start end) "\n"))
  522: 
  523: (defun forth-end-of-paragraph ()
  524:   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
  525:   (if (not (re-search-forward "\n[ \t]*\n" nil t))
  526:       (goto-char (point-max))))
  527: 
  528: (defun forth-send-paragraph ()
  529:   "Send the current or the previous paragraph to the Forth process"
  530:   (interactive)
  531:   (let (end)
  532:     (save-excursion
  533:       (forth-end-of-paragraph)
  534:       (skip-chars-backward  "\t\n ")
  535:       (setq end (point))
  536:       (if (re-search-backward "\n[ \t]*\n" nil t)
  537: 	  (setq start (point))
  538: 	(goto-char (point-min)))
  539:       (skip-chars-forward  "\t\n ")
  540:       (forth-send-region (point) end))))
  541:   
  542: (defun forth-send-buffer ()
  543:   "Send the current buffer to the Forth process."
  544:   (interactive)
  545:   (if (eq (current-buffer) (forth-process-buffer))
  546:       (error "Not allowed to send this buffer's contents to Forth"))
  547:   (forth-send-region (point-min) (point-max)))
  548: 
  549: 
  550: ;;;; Basic Process Control
  551: 
  552: (defun forth-start-process (command-line)
  553:   (let ((buffer (get-buffer-create "*forth*")))
  554:     (let ((process (get-buffer-process buffer)))
  555:       (save-excursion
  556: 	(set-buffer buffer)
  557: 	(progn (if process (delete-process process))
  558: 	       (goto-char (point-max))
  559: 	       (setq mode-line-process '(": %s"))
  560: 	       (add-to-global-mode-string 'forth-mode-string)
  561: 	       (setq process
  562: 		     (apply 'start-process
  563: 			    (cons forth-program-name
  564: 				  (cons buffer
  565: 					(forth-parse-command-line
  566: 					 command-line)))))
  567: 	       (set-marker (process-mark process) (point-max))
  568: 	       (forth-process-filter-initialize t)
  569: 	       (forth-modeline-initialize)
  570: 	       (set-process-sentinel process 'forth-process-sentinel)
  571: 	       (set-process-filter process 'forth-process-filter)
  572: 	       (run-hooks 'forth-start-hook)))
  573:     buffer)))
  574: 
  575: (defun forth-parse-command-line (string)
  576:   (setq string (substitute-in-file-name string))
  577:   (let ((start 0)
  578: 	(result '()))
  579:     (while start
  580:       (let ((index (string-match "[ \t]" string start)))
  581: 	(setq start
  582: 	      (cond ((not index)
  583: 		     (setq result
  584: 			   (cons (substring string start)
  585: 				 result))
  586: 		     nil)
  587: 		    ((= index start)
  588: 		     (string-match "[^ \t]" string start))
  589: 		    (t
  590: 		     (setq result
  591: 			   (cons (substring string start index)
  592: 				 result))
  593: 		     (1+ index))))))
  594:     (nreverse result)))
  595: 
  596: 
  597: (defun forth-process-running-p ()
  598:   "True iff there is a Forth process whose status is `run'."
  599:   (let ((process (get-process forth-program-name)))
  600:     (and process
  601: 	 (eq (process-status process) 'run))))
  602: 
  603: (defun forth-process-buffer ()
  604:   (let ((process (get-process forth-program-name)))
  605:     (and process (process-buffer process))))
  606: 
  607: ;;;; Process Filter
  608: 
  609: (defun forth-process-sentinel (proc reason)
  610:   (let ((inhibit-quit nil))
  611:     (forth-process-filter-initialize (eq reason 'run))
  612:     (if (eq reason 'run)
  613: 	(forth-modeline-initialize)
  614: 	(setq forth-mode-string "")))
  615:   (if (and (not (memq reason '(run stop)))
  616: 	   forth-signal-death-message)
  617:       (progn (beep)
  618: 	     (message
  619: "The Forth process has died!  Do M-x reset-forth to restart it"))))
  620: 
  621: (defun forth-process-filter-initialize (running-p)
  622:   (setq forth-process-filter-queue (cons '() '()))
  623:   (setq forth-prompt "ok"))
  624: 
  625: 
  626: (defun forth-process-filter (proc string)
  627:   (forth-process-filter-output string)
  628:   (forth-process-filter:finish))
  629: 
  630: (defun forth-process-filter:enqueue (action)
  631:   (let ((next (cons action '())))
  632:     (if (cdr forth-process-filter-queue)
  633: 	(setcdr (cdr forth-process-filter-queue) next)
  634: 	(setcar forth-process-filter-queue next))
  635:     (setcdr forth-process-filter-queue next)))
  636: 
  637: (defun forth-process-filter:finish ()
  638:   (while (car forth-process-filter-queue)
  639:     (let ((next (car forth-process-filter-queue)))
  640:       (setcar forth-process-filter-queue (cdr next))
  641:       (if (not (cdr next))
  642: 	  (setcdr forth-process-filter-queue '()))
  643:       (apply (car (car next)) (cdr (car next))))))
  644: 
  645: ;;;; Process Filter Output
  646: 
  647: (defun forth-process-filter-output (&rest args)
  648:   (if (not (and args
  649: 		(null (cdr args))
  650: 		(stringp (car args))
  651: 		(string-equal "" (car args))))
  652:       (forth-process-filter:enqueue
  653:        (cons 'forth-process-filter-output-1 args))))
  654: 
  655: (defun forth-process-filter-output-1 (&rest args)
  656:   (save-excursion
  657:     (forth-goto-output-point)
  658:     (apply 'insert-before-markers args)))
  659: 
  660: (defun forth-guarantee-newlines (n)
  661:   (save-excursion
  662:     (forth-goto-output-point)
  663:     (let ((stop nil))
  664:       (while (and (not stop)
  665: 		  (bolp))
  666: 	(setq n (1- n))
  667: 	(if (bobp)
  668: 	    (setq stop t)
  669: 	  (backward-char))))
  670:     (forth-goto-output-point)
  671:     (while (> n 0)
  672:       (insert-before-markers ?\n)
  673:       (setq n (1- n)))))
  674: 
  675: (defun forth-goto-output-point ()
  676:   (let ((process (get-process forth-program-name)))
  677:     (set-buffer (process-buffer process))
  678:     (goto-char (process-mark process))))
  679: 
  680: (defun forth-modeline-initialize ()
  681:   (setq forth-mode-string "  "))
  682: 
  683: (defun forth-set-runlight (runlight)
  684:   (aset forth-mode-string 0 runlight)
  685:   (forth-modeline-redisplay))
  686: 
  687: (defun forth-modeline-redisplay ()
  688:   (save-excursion (set-buffer (other-buffer)))
  689:   (set-buffer-modified-p (buffer-modified-p))
  690:   (sit-for 0))
  691: 
  692: ;;;; Process Filter Operations
  693: 
  694: (defun add-to-global-mode-string (x)
  695:   (cond ((null global-mode-string)
  696: 	 (setq global-mode-string (list "" x " ")))
  697: 	((not (memq x global-mode-string))
  698: 	 (setq global-mode-string
  699: 	       (cons ""
  700: 		     (cons x
  701: 			   (cons " "
  702: 				 (if (equal "" (car global-mode-string))
  703: 				     (cdr global-mode-string)
  704: 				     global-mode-string))))))))
  705: 
  706: 
  707: ;; Misc
  708: 
  709: (setq auto-mode-alist (append auto-mode-alist
  710: 				'(("\\.fs$" . forth-mode))))
  711: 
  712: (defun forth-split ()
  713:   (interactive)
  714:   (forth-split-1 "*forth*"))
  715: 
  716: (defun forth-split-1 (buffer)
  717:   (if (not (eq (window-buffer) (get-buffer buffer)))
  718:       (progn
  719: 	(delete-other-windows)
  720: 	(split-window-vertically
  721: 	 (/ (* (screen-height) forth-percent-height) 100))
  722: 	(other-window 1)
  723: 	(switch-to-buffer buffer)
  724: 	(goto-char (point-max))
  725: 	(other-window 1))))
  726:     
  727: (defun forth-reload ()
  728:   (interactive)
  729:   (let ((process (get-process forth-program-name)))
  730:     (if process (kill-process process t)))
  731:   (sleep-for 0 100)
  732:   (forth-mode))
  733: 
  734: 
  735: ;; Special section for forth-help
  736: 
  737: (defvar forth-help-buffer "*Forth-help*"
  738:   "Buffer used to display the requested documentation.")
  739: 
  740: (defvar forth-help-load-path nil
  741:   "List of directories to search through to find *.doc
  742:  (forth-help-file-suffix) files. Nil means current default directory.
  743:  The specified directories must contain at least one .doc file. If it
  744:  does not and you still want the load-path to scan that directory, create
  745:  an empty file dummy.doc.")
  746: 
  747: (defvar forth-help-file-suffix "*.doc"
  748:   "The file names to search for in each directory.")
  749: 
  750: (setq forth-search-command-prefix "grep -n \"^    [^(]* ")
  751: (defvar forth-search-command-suffix "/dev/null")
  752: (defvar forth-grep-error-regexp ": No such file or directory")
  753: 
  754: (defun forth-function-called-at-point ()
  755:   "Return the space delimited word a point."
  756:   (save-excursion
  757:     (save-restriction
  758:       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
  759:       (skip-chars-backward "^ \t\n" (point-min))
  760:       (if (looking-at "[ \t\n]")
  761: 	  (forward-char 1))
  762:       (let (obj (p (point)))
  763: 	(skip-chars-forward "^ \t\n")
  764: 	(buffer-substring p (point))))))
  765: 
  766: (defun forth-help-names-extend-comp (path-list result)
  767:   (cond ((null path-list) result)
  768: 	((null (car path-list))
  769: 	 (forth-help-names-extend-comp (cdr path-list) 
  770: 	       (concat result forth-help-file-suffix " ")))
  771: 	(t (forth-help-names-extend-comp
  772: 	    (cdr path-list) (concat result
  773: 				    (expand-file-name (car path-list)) "/"
  774: 				    forth-help-file-suffix " ")))))
  775: 
  776: (defun forth-help-names-extended ()
  777:   (if forth-help-load-path
  778:       (forth-help-names-extend-comp forth-help-load-path "")
  779:     (error "forth-help-load-path not specified")))
  780: 
  781: 
  782: ;(define-key forth-mode-map "\C-hf" 'forth-documentation)
  783: 
  784: (defun forth-documentation (function)
  785:   "Display the full documentation of FORTH word."
  786:   (interactive
  787:    (let ((fn (forth-function-called-at-point))
  788: 	 (enable-recursive-minibuffers t)	     
  789: 	 search-list
  790: 	 val)
  791:      (setq val (read-string (format "Describe forth word (default %s): " fn)))
  792:      (list (if (equal val "") fn val))))
  793:   (forth-get-doc (concat forth-search-command-prefix
  794: 			 (grep-regexp-quote (concat function " ("))
  795: 			 "[^)]*\-\-\" " (forth-help-names-extended)
  796: 			 forth-search-command-suffix))
  797:   (message "C-x C-m switches back to the forth interaction window"))
  798: 
  799: (defun forth-get-doc (command)
  800:   "Display the full documentation of command."
  801:   (let ((curwin (get-buffer-window (window-buffer)))
  802: 	reswin
  803: 	pointmax)
  804:     (with-output-to-temp-buffer forth-help-buffer
  805:       (progn
  806: 	(call-process "sh" nil forth-help-buffer t "-c" command)
  807: 	(setq reswin (get-buffer-window forth-help-buffer))))
  808:     (setq reswin (get-buffer-window forth-help-buffer))
  809:     (select-window reswin)
  810:     (save-excursion
  811:       (goto-char (setq pointmax (point-max)))
  812:       (insert "--------------------\n\n"))
  813:     (let (fd doc) 
  814:       (while (setq fd (forth-get-file-data pointmax))
  815: 	(setq doc (forth-get-doc-string fd))
  816: 	(save-excursion
  817: 	  (goto-char (point-max))
  818: 	  (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
  819: 		  ":\n\n" doc "\n")))
  820:       (if (not doc)
  821: 	  (progn (goto-char (point-max)) (insert "Not found"))))
  822:     (select-window curwin)))
  823:   
  824: (defun forth-skip-error-lines ()
  825:   (let ((lines 0))
  826:     (save-excursion
  827:       (while (re-search-forward forth-grep-error-regexp nil t)
  828: 	(beginning-of-line)
  829: 	(forward-line 1)
  830: 	(setq lines (1+ lines))))
  831:     (forward-line lines)))
  832: 
  833: (defun forth-get-doc-string (fd)
  834:   "Find file (car fd) and extract documentation from line (nth 1 fd)."
  835:   (let (result)
  836:     (save-window-excursion
  837:       (find-file (car fd))
  838:       (goto-line (nth 1 fd))
  839:       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
  840: 	  (error "forth-get-doc-string: serious error"))
  841:       (if (not (re-search-backward "\n[\t ]*\n" nil t))
  842: 	  (goto-char (point-min))
  843: 	(goto-char (match-end 0)))
  844:       (let ((p (point)))
  845: 	(if (not (re-search-forward "\n[\t ]*\n" nil t))
  846: 	    (goto-char (point-max)))
  847: 	(setq result (buffer-substring p (point))))
  848:       (bury-buffer (current-buffer)))
  849:     result))
  850: 
  851: (defun forth-get-file-data (limit)
  852:   "Parse grep output and return '(filename line#) list. Return nil when
  853:  passing limit."
  854:   (forth-skip-error-lines)
  855:   (if (< (point) limit)
  856:       (let ((result (forth-get-file-data-cont limit)))
  857: 	(forward-line 1)
  858: 	(beginning-of-line)
  859: 	result)))
  860: 
  861: (defun forth-get-file-data-cont (limit)
  862:   (let (result)
  863:     (let ((p (point)))
  864:       (skip-chars-forward "^:")
  865:       (setq result (buffer-substring p (point))))
  866:     (if (< (point) limit)
  867: 	(let ((p (1+ (point))))
  868: 	  (forward-char 1)
  869: 	  (skip-chars-forward "^:")
  870: 	  (list result (string-to-int (buffer-substring p (point))))))))
  871: 
  872: (defun grep-regexp-quote (str)
  873:   (let ((i 0) (m 1) (res ""))
  874:     (while (/= m 0)
  875:       (setq m (string-to-char (substring str i)))
  876:       (if (/= m 0)
  877: 	  (progn
  878: 	    (setq i (1+ i))
  879: 	    (if (string-match (regexp-quote (char-to-string m))
  880: 			      ".*\\^$[]")
  881: 		(setq res (concat res "\\")))
  882: 	    (setq res (concat res (char-to-string m))))))
  883:     res))
  884: 
  885: 
  886: (define-key forth-mode-map "\C-x\C-e" 'compile)
  887: (define-key forth-mode-map "\C-x\C-n" 'next-error)
  888: (require 'compile "compile")
  889: 
  890: (defvar forth-compile-command "gforth ")
  891: ;(defvar forth-compilation-window-percent-height 30)
  892: 
  893: (defun forth-compile (command)
  894:   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
  895:   (forth-split-1 "*compilation*")
  896:   (setq ctools-compile-command command)
  897:   (compile1 ctools-compile-command "No more errors"))
  898: 
  899: 
  900: ;;; Forth menu
  901: ;;; Mikael Karlsson <qramika@eras70.ericsson.se>
  902: 
  903: (cond ((string-match "XEmacs\\|Lucid" emacs-version)
  904:        (require 'func-menu)
  905: 
  906:   (defconst fume-function-name-regexp-forth
  907:    "^\\(:\\)[ \t]+\\([^ \t]*\\)"
  908:    "Expression to get word definitions in Forth.")
  909: 
  910:   (setq fume-function-name-regexp-alist
  911:       (append '((forth-mode . fume-function-name-regexp-forth) 
  912:              ) fume-function-name-regexp-alist))
  913: 
  914:   ;; Find next forth word in the buffer
  915:   (defun fume-find-next-forth-function-name (buffer)
  916:     "Searches for the next forth word in BUFFER."
  917:     (set-buffer buffer)
  918:     (if (re-search-forward fume-function-name-regexp nil t)
  919:       (let ((beg (match-beginning 2))
  920:             (end (match-end 2)))
  921:         (cons (buffer-substring beg end) beg))))
  922: 
  923:   (setq fume-find-function-name-method-alist
  924:   (append '((forth-mode    . fume-find-next-forth-function-name))))
  925: 
  926:   ))
  927: ;;; End Forth menu
  928: 
  929: ;;; File folding of forth-files
  930: ;;; uses outline
  931: ;;; Toggle activation with M-x fold-f (when editing a forth-file) 
  932: ;;; Use f9 to expand, f10 to hide, Or the menubar in xemacs
  933: ;;;
  934: ;;; Works most of the times but loses sync with the cursor occasionally 
  935: ;;; Could be improved by also folding on comments
  936: 
  937: (require 'outline)
  938: 
  939: (defun f-outline-level ()
  940: 	(cond	((looking-at "\\`\\\\")
  941: 			0)
  942: 		((looking-at "\\\\ SEC")
  943: 			0)
  944: 		((looking-at "\\\\ \\\\ .*")
  945: 			0)
  946: 		((looking-at "\\\\ DEFS")
  947: 			1)
  948: 		((looking-at "\\/\\* ")
  949: 			1)
  950: 		((looking-at ": .*")
  951: 			1)
  952: 		((looking-at "\\\\G")
  953: 			2)
  954: 		((looking-at "[ \t]+\\\\")
  955: 			3))
  956: )			
  957: 
  958: (defun fold-f  ()
  959:    (interactive)
  960:    (add-hook 'outline-minor-mode-hook 'hide-body)
  961: 
  962:    ; outline mode header start, i.e. find word definitions
  963: ;;;   (setq  outline-regexp  "^\\(:\\)[ \t]+\\([^ \t]*\\)")
  964:    (setq  outline-regexp  "\\`\\\\\\|:\\|\\\\ SEC\\|\\\\G\\|[ \t]+\\\\\\|\\\\ DEFS\\|\\/\\*\\|\\\\ \\\\ .*")
  965:    (setq outline-level 'f-outline-level)
  966: 
  967:    (outline-minor-mode)
  968:    (define-key outline-minor-mode-map '(shift up) 'hide-sublevels)
  969:    (define-key outline-minor-mode-map '(shift right) 'show-children)
  970:    (define-key outline-minor-mode-map '(shift left) 'hide-subtree)
  971:    (define-key outline-minor-mode-map '(shift down) 'show-subtree)
  972: 
  973: )
  974: 
  975: ;;(define-key global-map '(shift up) 'fold-f)
  976: 
  977: ;;; end file folding
  978: 
  979: ;;; func-menu is a package that scans your source file for function definitions
  980: ;;; and makes a menubar entry that lets you jump to any particular function
  981: ;;; definition by selecting it from the menu.  The following code turns this on
  982: ;;; for all of the recognized languages.  Scanning the buffer takes some time,
  983: ;;; but not much.
  984: ;;;
  985: (cond ((string-match "XEmacs\\|Lucid" emacs-version)
  986:        (require 'func-menu)
  987: ;;       (define-key global-map 'f8 'function-menu)
  988:        (add-hook 'find-fible-hooks 'fume-add-menubar-entry)
  989: ;       (define-key global-map "\C-cg" 'fume-prompt-function-goto)
  990: ;       (define-key global-map '(shift button3) 'mouse-function-menu)
  991: ))
  992: 
  993: ;;; Highlighting
  994: 
  995: (if (not (file-exists-p "/usr/share/emacs/site-lisp/hl319.el"))
  996:     (require 'hilit19)
  997:   (require 'hl319))
  998: 
  999: (hilit-set-mode-patterns
 1000:  '(forth-mode)
 1001:  (append
 1002:   '(("\\\\ \\(.*\\)$" nil comment)) ; comments
 1003:   '(("( [^)\n]* -- [^)\n]* )" nil decl))
 1004:   '(("( -- [^)\n]* )" nil decl))
 1005:   '(("( [^)\n]* -- )" nil decl))
 1006:   '(("( -- )" nil decl))
 1007:   '(("( " ")" comment))
 1008:   '(("\" [^\"\n]*\"" nil string))
 1009:   '(("\\(\\[IF]\\|\\[IFDEF]\\|\\[IFUNDEF]\\|\\[ELSE]\\|\\[THEN]\\|IF\\|ELSE\\|THEN\\|BEGIN\\|WHILE\\|REPEAT\\|UNTIL\\|?DO\\|DO\\|\+LOOP\\|LOOP\\)" nil keyword))
 1010:   '((": *[^ \n]*" nil defun))
 1011:   '(("Defer *[^ \n]*" nil defun))
 1012:   '(("Variable *[^ \n]*" nil define))
 1013:   '(("Constant *[^ \n]*" nil define))
 1014:   '(("include *[^ \n]*" nil include))
 1015:   '(("require *[^ \n]*" nil include))
 1016:   '(("[\n 	]\\(\\$[0-9A-Fa-f]+[\n 	]\\|&[0-9]+[\n 	]\\|[0-9]+[\n 	]\\|%[01]+[\n 	]\\|'[^ \n]+\\)+" nil formula))
 1017:   '((":noname" nil defun))))
 1018: 
 1019: ;; end
 1020: 

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