File:  [gforth] / gforth / gforth.el
Revision 1.5: download - view: text, annotated - select for diffs
Fri Jul 29 11:16:21 1994 UTC (27 years ago) by anton
Branches: MAIN
CVS tags: HEAD
Minor changes: adapted locals to the changed wordlists, some deletions
and additions to struct.fs and gforth.el

    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.
    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 1.5 1994/07/29 11:16:21 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 "
   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 "
   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-mode-abbrev-table nil
   56:   "Abbrev table in use in Forth-mode buffers.")
   57: 
   58: (define-abbrev-table 'forth-mode-abbrev-table ())
   59: 
   60: (defvar forth-mode-map nil
   61:   "Keymap used in Forth mode.")
   62: 
   63: (if (not forth-mode-map)
   64:     (setq forth-mode-map (make-sparse-keymap)))
   65: 
   66: (global-set-key "\e\C-m" 'forth-send-paragraph)
   67: (global-set-key "\C-x\C-m" 'forth-split)
   68: (global-set-key "\e " 'forth-reload)
   69: 
   70: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
   71: (define-key forth-mode-map "\eo" 'forth-send-buffer)
   72: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
   73: (define-key forth-mode-map "\e " 'forth-reload)
   74: (define-key forth-mode-map "\t" 'forth-indent-command)
   75: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
   76: 
   77: (defvar forth-mode-syntax-table nil
   78:   "Syntax table in use in Forth-mode buffers.")
   79: 
   80: (if (not forth-mode-syntax-table)
   81:     (progn
   82:       (setq forth-mode-syntax-table (make-syntax-table))
   83:       (modify-syntax-entry ?\\ "\\" forth-mode-syntax-table)
   84:       (modify-syntax-entry ?/ ". 14" forth-mode-syntax-table)
   85:       (modify-syntax-entry ?* ". 23" forth-mode-syntax-table)
   86:       (modify-syntax-entry ?+ "." forth-mode-syntax-table)
   87:       (modify-syntax-entry ?- "." forth-mode-syntax-table)
   88:       (modify-syntax-entry ?= "." forth-mode-syntax-table)
   89:       (modify-syntax-entry ?% "." forth-mode-syntax-table)
   90:       (modify-syntax-entry ?< "." forth-mode-syntax-table)
   91:       (modify-syntax-entry ?> "." forth-mode-syntax-table)
   92:       (modify-syntax-entry ?& "." forth-mode-syntax-table)
   93:       (modify-syntax-entry ?| "." forth-mode-syntax-table)
   94:       (modify-syntax-entry ?\' "\"" forth-mode-syntax-table)
   95:       (modify-syntax-entry ?\t "    " forth-mode-syntax-table)
   96:       (modify-syntax-entry ?) ">   " forth-mode-syntax-table)
   97:       (modify-syntax-entry ?( "<   " forth-mode-syntax-table)
   98:       (modify-syntax-entry ?\( "()  " forth-mode-syntax-table)
   99:       (modify-syntax-entry ?\) ")(  " forth-mode-syntax-table)))
  100: 
  101: (defconst forth-indent-level 4
  102:   "Indentation of Forth statements.")
  103: 
  104: (defun forth-mode-variables ()
  105:   (set-syntax-table forth-mode-syntax-table)
  106:   (setq local-abbrev-table forth-mode-abbrev-table)
  107:   (make-local-variable 'paragraph-start)
  108:   (setq paragraph-start (concat "^$\\|" page-delimiter))
  109:   (make-local-variable 'paragraph-separate)
  110:   (setq paragraph-separate paragraph-start)
  111:   (make-local-variable 'indent-line-function)
  112:   (setq indent-line-function 'forth-indent-line)
  113:   (make-local-variable 'require-final-newline)
  114:   (setq require-final-newline t)
  115:   (make-local-variable 'comment-start)
  116:   (setq comment-start "\\ ")
  117:   ;(make-local-variable 'comment-end)
  118:   ;(setq comment-end " )")
  119:   (make-local-variable 'comment-column)
  120:   (setq comment-column 40)
  121:   (make-local-variable 'comment-start-skip)
  122:   (setq comment-start-skip "\\ ")
  123:   (make-local-variable 'comment-indent-hook)
  124:   (setq comment-indent-hook 'forth-comment-indent)
  125:   (make-local-variable 'parse-sexp-ignore-comments)
  126:   (setq parse-sexp-ignore-comments t))
  127:   
  128: ;;;###autoload
  129: (defun forth-mode ()
  130:   "
  131: Major mode for editing Forth code. Tab indents for Forth code. Comments
  132: are delimited with ( ). Paragraphs are separated by blank lines only.
  133: Delete converts tabs to spaces as it moves back.
  134: \\{forth-mode-map}
  135:  Forth-split
  136:     Positions the current buffer on top and a forth-interaction window
  137:     below. The window size is controlled by the forth-percent-height
  138:     variable (see below).
  139:  Forth-reload
  140:     Reloads the forth library and restarts the forth process.
  141:  Forth-send-buffer
  142:     Sends the current buffer, in text representation, as input to the
  143:     forth process.
  144:  Forth-send-paragraph
  145:     Sends the previous or the current paragraph to the forth-process.
  146:     Note that the cursor only need to be with in the paragraph to be sent.
  147: forth-documentation
  148:     Search for documentation of forward adjacent to cursor. Note! To use
  149:     this mode you have to add a line, to your .emacs file, defining the
  150:     directories to search through for documentation files (se variable
  151:     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
  152: 
  153: Variables controlling interaction and startup
  154:  forth-percent-height
  155:     Tells split how high to make the edit portion, in percent of the
  156:     current screen height.
  157:  forth-program-name
  158:     Tells the library which program name to execute in the interation
  159:     window.
  160: 
  161: Variables controlling indentation style:
  162:  forth-positives
  163:     A string containing all words which causes the indent-level of the
  164:     following line to be incremented.
  165:     OBS! Each word must be surronded by spaces.
  166:  forth-negatives
  167:     A string containing all words which causes the indentation of the
  168:     current line to be decremented, if the word begin the line. These
  169:     words also has a cancelling effect on the indent-level of the
  170:     following line, independent of position.
  171:     OBS! Each word must be surronded by spaces.
  172:  forth-zeroes
  173:     A string containing all words which causes the indentation of the
  174:     current line to go to zero, if the word begin the line.
  175:     OBS! Each word must be surronded by spaces.
  176:  forth-indent-level
  177:     Indentation increment/decrement of Forth statements.
  178: 
  179:  Note! A word which decrements the indentation of the current line, may
  180:     also be mentioned in forth-positives to cause the indentation to
  181:     resume the previous level.
  182: 
  183: Variables controling documentation search
  184:  forth-help-load-path
  185:     List of directories to search through to find *.doc
  186:     (forth-help-file-suffix) files. Nil means current default directory.
  187:     The specified directories must contain at least one .doc file. If it
  188:     does not and you still want the load-path to scan that directory, create
  189:     an empty file dummy.doc.
  190:  forth-help-file-suffix
  191:     The file names to search for in each directory specified by
  192:     forth-help-load-path. Defaulted to '*.doc'. 
  193: "
  194:   (interactive)
  195:   (kill-all-local-variables)
  196:   (use-local-map forth-mode-map)
  197:   (setq mode-name "Forth")
  198:   (setq major-mode 'forth-mode)
  199:   (forth-mode-variables)
  200: ;  (if (not (forth-process-running-p))
  201: ;      (run-forth forth-program-name))
  202:   (run-hooks 'forth-mode-hook))
  203: 
  204: (defun forth-comment-indent ()
  205:   (save-excursion
  206:     (beginning-of-line)
  207:     (if (looking-at ":[ \t]*")
  208: 	(progn
  209: 	  (end-of-line)
  210: 	  (skip-chars-backward " \t\n")
  211: 	  (1+ (current-column)))
  212:       comment-column)))
  213: 
  214: (defun forth-current-indentation ()
  215:   (save-excursion
  216:     (beginning-of-line)
  217:     (back-to-indentation)
  218:     (current-column)))
  219: 
  220: (defun forth-delete-indentation ()
  221:   (let ((b nil) (m nil))
  222:     (save-excursion
  223:       (beginning-of-line)
  224:       (setq b (point))
  225:       (back-to-indentation)
  226:       (setq m (point)))
  227:     (delete-region b m)))
  228: 
  229: (defun forth-indent-line (&optional flag)
  230:   "Correct indentation of the current Forth line."
  231:   (let ((x (forth-calculate-indent)))
  232:     (forth-indent-to x)))
  233:   
  234: (defun forth-indent-command ()
  235:   (interactive)
  236:   (forth-indent-line t))
  237: 
  238: (defun forth-indent-to (x)
  239:   (let ((p nil))
  240:     (setq p (- (current-column) (forth-current-indentation)))
  241:     (forth-delete-indentation)
  242:     (beginning-of-line)
  243:     (indent-to x)
  244:     (if (> p 0) (forward-char p))))
  245: 
  246: ;;Calculate indent
  247: (defun forth-calculate-indent ()
  248:   (let ((w1 nil) (indent 0) (centre 0))
  249:     (save-excursion
  250:       (beginning-of-line)
  251:       (skip-chars-backward " \t\n")
  252:       (beginning-of-line)
  253:       (back-to-indentation)
  254:       (setq indent (current-column))
  255:       (setq centre indent)
  256:       (setq indent (+ indent (forth-sum-line-indentation))))
  257:     (save-excursion
  258:       (beginning-of-line)
  259:       (back-to-indentation)
  260:       (let ((p (point)))
  261: 	(skip-chars-forward "^ \t\n")
  262: 	(setq w1 (buffer-substring p (point)))))
  263:     (if (> (- indent centre) forth-indent-level)
  264: 	(setq indent (+ centre forth-indent-level)))
  265:     (if (> (- centre indent) forth-indent-level)
  266: 	(setq indent (- centre forth-indent-level)))
  267:     (if (< indent 0) (setq indent 0))
  268:     (setq indent (- indent
  269: 		    (if (string-match 
  270: 			 (regexp-quote (concat " " w1 " "))
  271: 			 forth-negatives)
  272: 			forth-indent-level 0)))
  273:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
  274: 	(setq indent 0))
  275:     indent))
  276: 
  277: (defun forth-sum-line-indentation ()
  278:   "Add upp the positive and negative weights of all words on the current line."
  279:   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
  280:     (end-of-line) (setq e (point))
  281:     (goto-char b)
  282:     (while (< (point) e)
  283:       (setq w (forth-next-word))
  284:       (setq t1 (string-match (regexp-quote (concat " " w " "))
  285: 			     forth-positives))
  286:       (setq t2 (string-match (regexp-quote (concat " " w " "))
  287: 			     forth-negatives))
  288:       (if (and t1 t2)
  289: 	  (setq sum (+ sum forth-indent-level)))
  290:       (if t1
  291: 	  (setq sum (+ sum forth-indent-level)))
  292:       (if (and t2 (not first))
  293: 	  (setq sum (- sum forth-indent-level)))
  294:       (skip-chars-forward " \t")
  295:       (setq first nil))
  296:     sum))
  297: 
  298: 
  299: (defun forth-next-word ()
  300:   "Return the next forth-word. Skip anything enclosed in double quotes or ()."
  301:   (let ((w1 nil))
  302:     (while (not w1)
  303:       (skip-chars-forward " \t\n")
  304:       (let ((p (point)))
  305: 	(skip-chars-forward "^ \t\n")
  306: 	(setq w1 (buffer-substring p (point))))
  307:       (cond ((string-match "\"" w1)
  308: 	     (progn
  309: 	       (skip-chars-forward "^\"")
  310: 	       (setq w1 nil)))
  311: 	    ((string-match "\(" w1)
  312: 	     (progn
  313: 	       (skip-chars-forward "^\)")
  314: 	       (setq w1 nil)))
  315: 	    (t nil)))
  316:     w1))
  317:       
  318: 
  319: ;; Forth commands
  320: 
  321: (defvar forth-program-name "gforth"
  322:   "*Program invoked by the `run-forth' command.")
  323: 
  324: (defvar forth-band-name nil
  325:   "*Band loaded by the `run-forth' command.")
  326: 
  327: (defvar forth-program-arguments nil
  328:   "*Arguments passed to the Forth program by the `run-forth' command.")
  329: 
  330: (defun run-forth (command-line)
  331:   "Run an inferior Forth process. Output goes to the buffer `*forth*'.
  332: With argument, asks for a command line. Split up screen and run forth 
  333: in the lower portion. The current-buffer when called will stay in the
  334: upper portion of the screen, and all other windows are deleted.
  335: Call run-forth again to make the *forth* buffer appear in the lower
  336: part of the screen."
  337:   (interactive
  338:    (list (let ((default
  339: 		 (or forth-process-command-line
  340: 		     (forth-default-command-line))))
  341: 	   (if current-prefix-arg
  342: 	       (read-string "Run Forth: " default)
  343: 	       default))))
  344:   (setq forth-process-command-line command-line)
  345:   (forth-start-process command-line)
  346:   (forth-split)
  347:   (forth-set-runlight forth-runlight:input))
  348: 
  349: (defun reset-forth ()
  350:   "Reset the Forth process."
  351:   (interactive)
  352:   (let ((process (get-process forth-program-name)))
  353:     (cond ((or (not process)
  354: 	       (not (eq (process-status process) 'run))
  355: 	       (yes-or-no-p
  356: "The Forth process is running, are you SURE you want to reset it? "))
  357: 	   (message "Resetting Forth process...")
  358: 	   (forth-reload)
  359: 	   (message "Resetting Forth process...done")))))
  360: 
  361: (defun forth-default-command-line ()
  362:   (concat forth-program-name " -emacs"
  363: 	  (if forth-program-arguments
  364: 	      (concat " " forth-program-arguments)
  365: 	      "")
  366: 	  (if forth-band-name
  367: 	      (concat " -band " forth-band-name)
  368: 	      "")))
  369: 
  370: ;;;; Internal Variables
  371: 
  372: (defvar forth-process-command-line nil
  373:   "Command used to start the most recent Forth process.")
  374: 
  375: (defvar forth-previous-send ""
  376:   "Most recent expression transmitted to the Forth process.")
  377: 
  378: (defvar forth-process-filter-queue '()
  379:   "Queue used to synchronize filter actions properly.")
  380: 
  381: (defvar forth-prompt "ok"
  382:   "The current forth prompt string.")
  383: 
  384: (defvar forth-start-hook nil
  385:   "If non-nil, a procedure to call when the Forth process is started.
  386: When called, the current buffer will be the Forth process-buffer.")
  387: 
  388: (defvar forth-signal-death-message nil
  389:   "If non-nil, causes a message to be generated when the Forth process dies.")
  390: 
  391: (defvar forth-percent-height 62
  392:   "Tells run-forth how high the upper window should be in percent.")
  393: 
  394: (defconst forth-runlight:input ?I
  395:   "The character displayed when the Forth process is waiting for input.")
  396: 
  397: (defvar forth-mode-string ""
  398:   "String displayed in the mode line when the Forth process is running.")
  399: 
  400: ;;;; Evaluation Commands
  401: 
  402: (defun forth-send-string (&rest strings)
  403:   "Send the string arguments to the Forth process.
  404: The strings are concatenated and terminated by a newline."
  405:   (cond ((forth-process-running-p)
  406: 	 (forth-send-string-1 strings))
  407: 	((yes-or-no-p "The Forth process has died.  Reset it? ")
  408: 	 (reset-forth)
  409: 	 (goto-char (point-max))
  410: 	 (forth-send-string-1 strings))))
  411: 
  412: (defun forth-send-string-1 (strings)
  413:   (let ((string (apply 'concat strings)))
  414:     (forth-send-string-2 string)))
  415: 
  416: (defun forth-send-string-2 (string)
  417:   (let ((process (get-process forth-program-name)))
  418:     (if (not (eq (current-buffer) (get-buffer forth-program-name)))
  419: 	(progn
  420: 	 (forth-process-filter-output string)
  421: 	 (forth-process-filter:finish)))
  422:     (send-string process (concat string "\n"))
  423:     (if (eq (current-buffer) (process-buffer process))
  424: 	(set-marker (process-mark process) (point)))))
  425: 
  426: 
  427: (defun forth-send-region (start end)
  428:   "Send the current region to the Forth process.
  429: The region is sent terminated by a newline."
  430:   (interactive "r")
  431:   (let ((process (get-process forth-program-name)))
  432:     (if (and process (eq (current-buffer) (process-buffer process)))
  433: 	(progn (goto-char end)
  434: 	       (set-marker (process-mark process) end))))
  435:   (forth-send-string "\n" (buffer-substring start end) "\n"))
  436: 
  437: (defun forth-end-of-paragraph ()
  438:   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
  439:   (if (not (re-search-forward "\n[ \t]*\n" nil t))
  440:       (goto-char (point-max))))
  441: 
  442: (defun forth-send-paragraph ()
  443:   "Send the current or the previous paragraph to the Forth process"
  444:   (interactive)
  445:   (let (end)
  446:     (save-excursion
  447:       (forth-end-of-paragraph)
  448:       (skip-chars-backward  "\t\n ")
  449:       (setq end (point))
  450:       (if (re-search-backward "\n[ \t]*\n" nil t)
  451: 	  (setq start (point))
  452: 	(goto-char (point-min)))
  453:       (skip-chars-forward  "\t\n ")
  454:       (forth-send-region (point) end))))
  455:   
  456: (defun forth-send-buffer ()
  457:   "Send the current buffer to the Forth process."
  458:   (interactive)
  459:   (if (eq (current-buffer) (forth-process-buffer))
  460:       (error "Not allowed to send this buffer's contents to Forth"))
  461:   (forth-send-region (point-min) (point-max)))
  462: 
  463: 
  464: ;;;; Basic Process Control
  465: 
  466: (defun forth-start-process (command-line)
  467:   (let ((buffer (get-buffer-create "*forth*")))
  468:     (let ((process (get-buffer-process buffer)))
  469:       (save-excursion
  470: 	(set-buffer buffer)
  471: 	(progn (if process (delete-process process))
  472: 	       (goto-char (point-max))
  473: 	       (setq mode-line-process '(": %s"))
  474: 	       (add-to-global-mode-string 'forth-mode-string)
  475: 	       (setq process
  476: 		     (apply 'start-process
  477: 			    (cons forth-program-name
  478: 				  (cons buffer
  479: 					(forth-parse-command-line
  480: 					 command-line)))))
  481: 	       (set-marker (process-mark process) (point-max))
  482: 	       (forth-process-filter-initialize t)
  483: 	       (forth-modeline-initialize)
  484: 	       (set-process-sentinel process 'forth-process-sentinel)
  485: 	       (set-process-filter process 'forth-process-filter)
  486: 	       (run-hooks 'forth-start-hook)))
  487:     buffer)))
  488: 
  489: (defun forth-parse-command-line (string)
  490:   (setq string (substitute-in-file-name string))
  491:   (let ((start 0)
  492: 	(result '()))
  493:     (while start
  494:       (let ((index (string-match "[ \t]" string start)))
  495: 	(setq start
  496: 	      (cond ((not index)
  497: 		     (setq result
  498: 			   (cons (substring string start)
  499: 				 result))
  500: 		     nil)
  501: 		    ((= index start)
  502: 		     (string-match "[^ \t]" string start))
  503: 		    (t
  504: 		     (setq result
  505: 			   (cons (substring string start index)
  506: 				 result))
  507: 		     (1+ index))))))
  508:     (nreverse result)))
  509: 
  510: 
  511: (defun forth-process-running-p ()
  512:   "True iff there is a Forth process whose status is `run'."
  513:   (let ((process (get-process forth-program-name)))
  514:     (and process
  515: 	 (eq (process-status process) 'run))))
  516: 
  517: (defun forth-process-buffer ()
  518:   (let ((process (get-process forth-program-name)))
  519:     (and process (process-buffer process))))
  520: 
  521: ;;;; Process Filter
  522: 
  523: (defun forth-process-sentinel (proc reason)
  524:   (let ((inhibit-quit nil))
  525:     (forth-process-filter-initialize (eq reason 'run))
  526:     (if (eq reason 'run)
  527: 	(forth-modeline-initialize)
  528: 	(setq forth-mode-string "")))
  529:   (if (and (not (memq reason '(run stop)))
  530: 	   forth-signal-death-message)
  531:       (progn (beep)
  532: 	     (message
  533: "The Forth process has died!  Do M-x reset-forth to restart it"))))
  534: 
  535: (defun forth-process-filter-initialize (running-p)
  536:   (setq forth-process-filter-queue (cons '() '()))
  537:   (setq forth-prompt "ok"))
  538: 
  539: 
  540: (defun forth-process-filter (proc string)
  541:   (forth-process-filter-output string)
  542:   (forth-process-filter:finish))
  543: 
  544: (defun forth-process-filter:enqueue (action)
  545:   (let ((next (cons action '())))
  546:     (if (cdr forth-process-filter-queue)
  547: 	(setcdr (cdr forth-process-filter-queue) next)
  548: 	(setcar forth-process-filter-queue next))
  549:     (setcdr forth-process-filter-queue next)))
  550: 
  551: (defun forth-process-filter:finish ()
  552:   (while (car forth-process-filter-queue)
  553:     (let ((next (car forth-process-filter-queue)))
  554:       (setcar forth-process-filter-queue (cdr next))
  555:       (if (not (cdr next))
  556: 	  (setcdr forth-process-filter-queue '()))
  557:       (apply (car (car next)) (cdr (car next))))))
  558: 
  559: ;;;; Process Filter Output
  560: 
  561: (defun forth-process-filter-output (&rest args)
  562:   (if (not (and args
  563: 		(null (cdr args))
  564: 		(stringp (car args))
  565: 		(string-equal "" (car args))))
  566:       (forth-process-filter:enqueue
  567:        (cons 'forth-process-filter-output-1 args))))
  568: 
  569: (defun forth-process-filter-output-1 (&rest args)
  570:   (save-excursion
  571:     (forth-goto-output-point)
  572:     (apply 'insert-before-markers args)))
  573: 
  574: (defun forth-guarantee-newlines (n)
  575:   (save-excursion
  576:     (forth-goto-output-point)
  577:     (let ((stop nil))
  578:       (while (and (not stop)
  579: 		  (bolp))
  580: 	(setq n (1- n))
  581: 	(if (bobp)
  582: 	    (setq stop t)
  583: 	  (backward-char))))
  584:     (forth-goto-output-point)
  585:     (while (> n 0)
  586:       (insert-before-markers ?\n)
  587:       (setq n (1- n)))))
  588: 
  589: (defun forth-goto-output-point ()
  590:   (let ((process (get-process forth-program-name)))
  591:     (set-buffer (process-buffer process))
  592:     (goto-char (process-mark process))))
  593: 
  594: (defun forth-modeline-initialize ()
  595:   (setq forth-mode-string "  "))
  596: 
  597: (defun forth-set-runlight (runlight)
  598:   (aset forth-mode-string 0 runlight)
  599:   (forth-modeline-redisplay))
  600: 
  601: (defun forth-modeline-redisplay ()
  602:   (save-excursion (set-buffer (other-buffer)))
  603:   (set-buffer-modified-p (buffer-modified-p))
  604:   (sit-for 0))
  605: 
  606: ;;;; Process Filter Operations
  607: 
  608: (defun add-to-global-mode-string (x)
  609:   (cond ((null global-mode-string)
  610: 	 (setq global-mode-string (list "" x " ")))
  611: 	((not (memq x global-mode-string))
  612: 	 (setq global-mode-string
  613: 	       (cons ""
  614: 		     (cons x
  615: 			   (cons " "
  616: 				 (if (equal "" (car global-mode-string))
  617: 				     (cdr global-mode-string)
  618: 				     global-mode-string))))))))
  619: 
  620: 
  621: ;; Misc
  622: 
  623: (setq auto-mode-alist (append auto-mode-alist
  624: 				'(("\\.fs$" . forth-mode))))
  625: 
  626: (defun forth-split ()
  627:   (interactive)
  628:   (forth-split-1 "*forth*"))
  629: 
  630: (defun forth-split-1 (buffer)
  631:   (if (not (eq (window-buffer) (get-buffer buffer)))
  632:       (progn
  633: 	(delete-other-windows)
  634: 	(split-window-vertically
  635: 	 (/ (* (screen-height) forth-percent-height) 100))
  636: 	(other-window 1)
  637: 	(switch-to-buffer buffer)
  638: 	(goto-char (point-max))
  639: 	(other-window 1))))
  640:     
  641: (defun forth-reload ()
  642:   (interactive)
  643:   (let ((process (get-process forth-program-name)))
  644:     (if process (kill-process process t)))
  645:   (sleep-for-millisecs 100)
  646:   (forth-mode))
  647: 
  648: 
  649: ;; Special section for forth-help
  650: 
  651: (defvar forth-help-buffer "*Forth-help*"
  652:   "Buffer used to display the requested documentation.")
  653: 
  654: (defvar forth-help-load-path nil
  655:   "List of directories to search through to find *.doc
  656:  (forth-help-file-suffix) files. Nil means current default directory.
  657:  The specified directories must contain at least one .doc file. If it
  658:  does not and you still want the load-path to scan that directory, create
  659:  an empty file dummy.doc.")
  660: 
  661: (defvar forth-help-file-suffix "*.doc"
  662:   "The file names to search for in each directory.")
  663: 
  664: (setq forth-search-command-prefix "grep -n \"^    [^(]* ")
  665: (defvar forth-search-command-suffix "/dev/null")
  666: (defvar forth-grep-error-regexp ": No such file or directory")
  667: 
  668: (defun forth-function-called-at-point ()
  669:   "Return the space delimited word a point."
  670:   (save-excursion
  671:     (save-restriction
  672:       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
  673:       (skip-chars-backward "^ \t\n" (point-min))
  674:       (if (looking-at "[ \t\n]")
  675: 	  (forward-char 1))
  676:       (let (obj (p (point)))
  677: 	(skip-chars-forward "^ \t\n")
  678: 	(buffer-substring p (point))))))
  679: 
  680: (defun forth-help-names-extend-comp (path-list result)
  681:   (cond ((null path-list) result)
  682: 	((null (car path-list))
  683: 	 (forth-help-names-extend-comp (cdr path-list) 
  684: 	       (concat result forth-help-file-suffix " ")))
  685: 	(t (forth-help-names-extend-comp
  686: 	    (cdr path-list) (concat result
  687: 				    (expand-file-name (car path-list)) "/"
  688: 				    forth-help-file-suffix " ")))))
  689: 
  690: (defun forth-help-names-extended ()
  691:   (if forth-help-load-path
  692:       (forth-help-names-extend-comp forth-help-load-path "")
  693:     (error "forth-help-load-path not specified")))
  694: 
  695: 
  696: (define-key forth-mode-map "\C-hf" 'forth-documentation)
  697: 
  698: (defun forth-documentation (function)
  699:   "Display the full documentation of FORTH word."
  700:   (interactive
  701:    (let ((fn (forth-function-called-at-point))
  702: 	 (enable-recursive-minibuffers t)	     
  703: 	 search-list
  704: 	 val)
  705:      (setq val (read-string (format "Describe forth word (default %s): " fn)))
  706:      (list (if (equal val "") fn val))))
  707:   (forth-get-doc (concat forth-search-command-prefix
  708: 			 (grep-regexp-quote (concat function " ("))
  709: 			 "[^)]*\-\-\" " (forth-help-names-extended)
  710: 			 forth-search-command-suffix))
  711:   (message "C-x C-m switches back to the forth interaction window"))
  712: 
  713: (defun forth-get-doc (command)
  714:   "Display the full documentation of command."
  715:   (let ((curwin (get-buffer-window (window-buffer)))
  716: 	reswin
  717: 	pointmax)
  718:     (with-output-to-temp-buffer forth-help-buffer
  719:       (progn
  720: 	(call-process "sh" nil forth-help-buffer t "-c" command)
  721: 	(setq reswin (get-buffer-window forth-help-buffer))))
  722:     (setq reswin (get-buffer-window forth-help-buffer))
  723:     (select-window reswin)
  724:     (save-excursion
  725:       (goto-char (setq pointmax (point-max)))
  726:       (insert "--------------------\n\n"))
  727:     (let (fd doc) 
  728:       (while (setq fd (forth-get-file-data pointmax))
  729: 	(setq doc (forth-get-doc-string fd))
  730: 	(save-excursion
  731: 	  (goto-char (point-max))
  732: 	  (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
  733: 		  ":\n\n" doc "\n")))
  734:       (if (not doc)
  735: 	  (progn (goto-char (point-max)) (insert "Not found"))))
  736:     (select-window curwin)))
  737:   
  738: (defun forth-skip-error-lines ()
  739:   (let ((lines 0))
  740:     (save-excursion
  741:       (while (re-search-forward forth-grep-error-regexp nil t)
  742: 	(beginning-of-line)
  743: 	(forward-line 1)
  744: 	(setq lines (1+ lines))))
  745:     (forward-line lines)))
  746: 
  747: (defun forth-get-doc-string (fd)
  748:   "Find file (car fd) and extract documentation from line (nth 1 fd)."
  749:   (let (result)
  750:     (save-window-excursion
  751:       (find-file (car fd))
  752:       (goto-line (nth 1 fd))
  753:       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
  754: 	  (error "forth-get-doc-string: serious error"))
  755:       (if (not (re-search-backward "\n[\t ]*\n" nil t))
  756: 	  (goto-char (point-min))
  757: 	(goto-char (match-end 0)))
  758:       (let ((p (point)))
  759: 	(if (not (re-search-forward "\n[\t ]*\n" nil t))
  760: 	    (goto-char (point-max)))
  761: 	(setq result (buffer-substring p (point))))
  762:       (bury-buffer (current-buffer)))
  763:     result))
  764: 
  765: (defun forth-get-file-data (limit)
  766:   "Parse grep output and return '(filename line#) list. Return nil when
  767:  passing limit."
  768:   (forth-skip-error-lines)
  769:   (if (< (point) limit)
  770:       (let ((result (forth-get-file-data-cont limit)))
  771: 	(forward-line 1)
  772: 	(beginning-of-line)
  773: 	result)))
  774: 
  775: (defun forth-get-file-data-cont (limit)
  776:   (let (result)
  777:     (let ((p (point)))
  778:       (skip-chars-forward "^:")
  779:       (setq result (buffer-substring p (point))))
  780:     (if (< (point) limit)
  781: 	(let ((p (1+ (point))))
  782: 	  (forward-char 1)
  783: 	  (skip-chars-forward "^:")
  784: 	  (list result (string-to-int (buffer-substring p (point))))))))
  785: 
  786: (defun grep-regexp-quote (str)
  787:   (let ((i 0) (m 1) (res ""))
  788:     (while (/= m 0)
  789:       (setq m (string-to-char (substring str i)))
  790:       (if (/= m 0)
  791: 	  (progn
  792: 	    (setq i (1+ i))
  793: 	    (if (string-match (regexp-quote (char-to-string m))
  794: 			      ".*\\^$[]")
  795: 		(setq res (concat res "\\")))
  796: 	    (setq res (concat res (char-to-string m))))))
  797:     res))
  798: 
  799: 
  800: (define-key forth-mode-map "\C-x\C-e" 'forth-compile)
  801: (define-key forth-mode-map "\C-x\C-n" 'next-error)
  802: (require 'compile "compile")
  803: 
  804: (defvar forth-compile-command "forth ")
  805: (defvar forth-compilation-window-percent-height 30)
  806: 
  807: (defun forth-compile (command)
  808:   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
  809:   (forth-split-1 "*compilation*")
  810:   (setq ctools-compile-command command)
  811:   (compile1 ctools-compile-command "No more errors"))
  812: 
  813: 

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