File:  [gforth] / gforth / gforth.el
Revision 1.31: download - view: text, annotated - select for diffs
Tue Dec 8 22:02:43 1998 UTC (22 years, 5 months ago) by anton
Branches: MAIN
CVS tags: v0-4-0, HEAD
updated dates in copyright messages
inserted copyright messages in most files that did not have them
removed outdated files engine/32bit.h engine/strsig.c

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

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