File:  [gforth] / gforth / gforth.el
Revision 1.6: download - view: text, annotated - select for diffs
Wed Aug 10 17:22:36 1994 UTC (26 years, 11 months ago) by anton
Branches: MAIN
CVS tags: HEAD
added blocks.fs
improved indentation in 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 (mainly indentation and syntax tables).
    6: ;; So there is still a lot of work to do to adapt this to gforth.
    7: 
    8: ;; GNU Emacs is distributed in the hope that it will be useful,
    9: ;; but WITHOUT ANY WARRANTY.  No author or distributor
   10: ;; accepts responsibility to anyone for the consequences of using it
   11: ;; or for whether it serves any particular purpose or works at all,
   12: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
   13: ;; License for full details.
   14: 
   15: ;; Everyone is granted permission to copy, modify and redistribute
   16: ;; GNU Emacs, but only under the conditions described in the
   17: ;; GNU Emacs General Public License.   A copy of this license is
   18: ;; supposed to have been given to you along with GNU Emacs so you
   19: ;; can know your rights and responsibilities.  It should be in a
   20: ;; file named COPYING.  Among other things, the copyright notice
   21: ;; and this notice must be preserved on all copies.
   22: 
   23: ;;; $Header: /nfs/unsafe/cvs-repository/src-master/gforth/gforth.el,v 1.6 1994/08/10 17:22:36 anton Exp $
   24: 
   25: ;;-------------------------------------------------------------------
   26: ;; A Forth indentation, documentation search and interaction library
   27: ;;-------------------------------------------------------------------
   28: ;;
   29: ;; Written by Goran Rydqvist, gorry@ida.liu.se, Summer 1988
   30: ;; Started:	16 July 88
   31: ;; Version:	2.10
   32: ;; Last update:	5 December 1989 by Mikael Patel, mip@ida.liu.se
   33: ;; Last update:	25 June 1990 by Goran Rydqvist, gorry@ida.liu.se
   34: ;;
   35: ;; Documentation: See forth-mode (^HF forth-mode)
   36: ;;-------------------------------------------------------------------
   37: 
   38: 
   39: (defvar forth-positives
   40:   " : :noname begin do ?do while if ?dup-if ?dup-not-if else case create does> exception> struct [if] [else] "
   41:   "Contains all words which will cause the indent-level to be incremented
   42: on the next line.
   43: OBS! All words in forth-positives must be surrounded by spaces.")
   44: 
   45: (defvar forth-negatives
   46:   " ; until repeat while +loop loop s+loop else then endif again endcase does> end-struct [then] [else] "
   47:   "Contains all words which will cause the indent-level to be decremented
   48: on the current line.
   49: OBS! All words in forth-negatives must be surrounded by spaces.")
   50: 
   51: (defvar forth-zeroes
   52:   " : :noname "
   53:   "Contains all words which causes the indent to go to zero")
   54: 
   55: (defvar forth-prefixes
   56:   " postpone [compile] ['] [char] "
   57:   "words that prefix and escape other words")
   58: 
   59: (defvar forth-mode-abbrev-table nil
   60:   "Abbrev table in use in Forth-mode buffers.")
   61: 
   62: (define-abbrev-table 'forth-mode-abbrev-table ())
   63: 
   64: (defvar forth-mode-map nil
   65:   "Keymap used in Forth mode.")
   66: 
   67: (if (not forth-mode-map)
   68:     (setq forth-mode-map (make-sparse-keymap)))
   69: 
   70: (global-set-key "\e\C-m" 'forth-send-paragraph)
   71: (global-set-key "\C-x\C-m" 'forth-split)
   72: (global-set-key "\e " 'forth-reload)
   73: 
   74: (define-key forth-mode-map "\M-\C-x" 'compile)
   75: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
   76: (define-key forth-mode-map "\eo" 'forth-send-buffer)
   77: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
   78: (define-key forth-mode-map "\e " 'forth-reload)
   79: (define-key forth-mode-map "\t" 'forth-indent-command)
   80: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
   81: 
   82: (defvar forth-mode-syntax-table nil
   83:   "Syntax table in use in Forth-mode buffers.")
   84: 
   85: (if (not forth-mode-syntax-table)
   86:     (progn
   87:       (setq forth-mode-syntax-table (make-syntax-table))
   88:       (let ((char 0))
   89: 	(while (< char ?!)
   90: 	  (modify-syntax-entry char " " forth-mode-syntax-table)
   91: 	  (setq char (1+ char)))
   92: 	(while (< char 256)
   93: 	  (modify-syntax-entry char "w" forth-mode-syntax-table)
   94: 	  (setq char (1+ char))))
   95:       (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)
   96:       (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)
   97:       (modify-syntax-entry ?\n ">" forth-mode-syntax-table)
   98:       ))
   99: ;I do not define '(' and ')' as comment delimiters, because emacs
  100: ;only supports one comment syntax (and a hack to accomodate C++); I
  101: ;use '\' for natural language comments and '(' for formal comments
  102: ;like stack comments, so for me it's better to have emacs treat '\'
  103: ;comments as comments. I you want it different, make the appropriate
  104: ;changes (best in your .emacs file).
  105: ;
  106: ;Hmm, the C++ hack could be used to support both comment syntaxes: we
  107: ;can have different comment styles, if both comments start with the
  108: ;same character. we could use ' ' as first and '(' and '\' as second
  109: ;character. However this would fail for G\ comments.
  110: 
  111: (defconst forth-indent-level 4
  112:   "Indentation of Forth statements.")
  113: 
  114: (defun forth-mode-variables ()
  115:   (set-syntax-table forth-mode-syntax-table)
  116:   (setq local-abbrev-table forth-mode-abbrev-table)
  117:   (make-local-variable 'paragraph-start)
  118:   (setq paragraph-start (concat "^$\\|" page-delimiter))
  119:   (make-local-variable 'paragraph-separate)
  120:   (setq paragraph-separate paragraph-start)
  121:   (make-local-variable 'indent-line-function)
  122:   (setq indent-line-function 'forth-indent-line)
  123: ;  (make-local-variable 'require-final-newline)
  124: ;  (setq require-final-newline t)
  125:   (make-local-variable 'comment-start)
  126:   (setq comment-start "\\ ")
  127:   ;(make-local-variable 'comment-end)
  128:   ;(setq comment-end " )")
  129:   (make-local-variable 'comment-column)
  130:   (setq comment-column 40)
  131:   (make-local-variable 'comment-start-skip)
  132:   (setq comment-start-skip "\\ ")
  133:   (make-local-variable 'comment-indent-hook)
  134:   (setq comment-indent-hook 'forth-comment-indent)
  135:   (make-local-variable 'parse-sexp-ignore-comments)
  136:   (setq parse-sexp-ignore-comments t))
  137:   
  138: ;;;###autoload
  139: (defun forth-mode ()
  140:   "
  141: Major mode for editing Forth code. Tab indents for Forth code. Comments
  142: are delimited with ( ). Paragraphs are separated by blank lines only.
  143: Delete converts tabs to spaces as it moves back.
  144: \\{forth-mode-map}
  145:  Forth-split
  146:     Positions the current buffer on top and a forth-interaction window
  147:     below. The window size is controlled by the forth-percent-height
  148:     variable (see below).
  149:  Forth-reload
  150:     Reloads the forth library and restarts the forth process.
  151:  Forth-send-buffer
  152:     Sends the current buffer, in text representation, as input to the
  153:     forth process.
  154:  Forth-send-paragraph
  155:     Sends the previous or the current paragraph to the forth-process.
  156:     Note that the cursor only need to be with in the paragraph to be sent.
  157: forth-documentation
  158:     Search for documentation of forward adjacent to cursor. Note! To use
  159:     this mode you have to add a line, to your .emacs file, defining the
  160:     directories to search through for documentation files (se variable
  161:     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
  162: 
  163: Variables controlling interaction and startup
  164:  forth-percent-height
  165:     Tells split how high to make the edit portion, in percent of the
  166:     current screen height.
  167:  forth-program-name
  168:     Tells the library which program name to execute in the interation
  169:     window.
  170: 
  171: Variables controlling indentation style:
  172:  forth-positives
  173:     A string containing all words which causes the indent-level of the
  174:     following line to be incremented.
  175:     OBS! Each word must be surronded by spaces.
  176:  forth-negatives
  177:     A string containing all words which causes the indentation of the
  178:     current line to be decremented, if the word begin the line. These
  179:     words also has a cancelling effect on the indent-level of the
  180:     following line, independent of position.
  181:     OBS! Each word must be surronded by spaces.
  182:  forth-zeroes
  183:     A string containing all words which causes the indentation of the
  184:     current line to go to zero, if the word begin the line.
  185:     OBS! Each word must be surronded by spaces.
  186:  forth-indent-level
  187:     Indentation increment/decrement of Forth statements.
  188: 
  189:  Note! A word which decrements the indentation of the current line, may
  190:     also be mentioned in forth-positives to cause the indentation to
  191:     resume the previous level.
  192: 
  193: Variables controling documentation search
  194:  forth-help-load-path
  195:     List of directories to search through to find *.doc
  196:     (forth-help-file-suffix) files. Nil means current default directory.
  197:     The specified directories must contain at least one .doc file. If it
  198:     does not and you still want the load-path to scan that directory, create
  199:     an empty file dummy.doc.
  200:  forth-help-file-suffix
  201:     The file names to search for in each directory specified by
  202:     forth-help-load-path. Defaulted to '*.doc'. 
  203: "
  204:   (interactive)
  205:   (kill-all-local-variables)
  206:   (use-local-map forth-mode-map)
  207:   (setq mode-name "Forth")
  208:   (setq major-mode 'forth-mode)
  209:   (forth-mode-variables)
  210: ;  (if (not (forth-process-running-p))
  211: ;      (run-forth forth-program-name))
  212:   (run-hooks 'forth-mode-hook))
  213: 
  214: (setq forth-mode-hook
  215:       '(lambda () (setq compile-command "gforth ")))
  216: 
  217: (defun forth-comment-indent ()
  218:   (save-excursion
  219:     (beginning-of-line)
  220:     (if (looking-at ":[ \t]*")
  221: 	(progn
  222: 	  (end-of-line)
  223: 	  (skip-chars-backward " \t\n")
  224: 	  (1+ (current-column)))
  225:       comment-column)))
  226: 
  227: (defun forth-current-indentation ()
  228:   (save-excursion
  229:     (beginning-of-line)
  230:     (back-to-indentation)
  231:     (current-column)))
  232: 
  233: (defun forth-delete-indentation ()
  234:   (let ((b nil) (m nil))
  235:     (save-excursion
  236:       (beginning-of-line)
  237:       (setq b (point))
  238:       (back-to-indentation)
  239:       (setq m (point)))
  240:     (delete-region b m)))
  241: 
  242: (defun forth-indent-line (&optional flag)
  243:   "Correct indentation of the current Forth line."
  244:   (let ((x (forth-calculate-indent)))
  245:     (forth-indent-to x)))
  246:   
  247: (defun forth-indent-command ()
  248:   (interactive)
  249:   (forth-indent-line t))
  250: 
  251: (defun forth-indent-to (x)
  252:   (let ((p nil))
  253:     (setq p (- (current-column) (forth-current-indentation)))
  254:     (forth-delete-indentation)
  255:     (beginning-of-line)
  256:     (indent-to x)
  257:     (if (> p 0) (forward-char p))))
  258: 
  259: ;;Calculate indent
  260: (defun forth-calculate-indent ()
  261:   (let ((w1 nil) (indent 0) (centre 0))
  262:     (save-excursion
  263:       (beginning-of-line)
  264:       (skip-chars-backward " \t\n")
  265:       (beginning-of-line)
  266:       (back-to-indentation)
  267:       (setq indent (current-column))
  268:       (setq centre indent)
  269:       (setq indent (+ indent (forth-sum-line-indentation))))
  270:     (save-excursion
  271:       (beginning-of-line)
  272:       (back-to-indentation)
  273:       (let ((p (point)))
  274: 	(skip-chars-forward "^ \t\n")
  275: 	(setq w1 (buffer-substring p (point)))))
  276:     (if (> (- indent centre) forth-indent-level)
  277: 	(setq indent (+ centre forth-indent-level)))
  278:     (if (> (- centre indent) forth-indent-level)
  279: 	(setq indent (- centre forth-indent-level)))
  280:     (if (< indent 0) (setq indent 0))
  281:     (setq indent (- indent
  282: 		    (if (string-match 
  283: 			 (regexp-quote (concat " " w1 " "))
  284: 			 forth-negatives)
  285: 			forth-indent-level 0)))
  286:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
  287: 	(setq indent 0))
  288:     indent))
  289: 
  290: (defun forth-sum-line-indentation ()
  291:   "Add upp the positive and negative weights of all words on the current line."
  292:   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
  293:     (end-of-line) (setq e (point))
  294:     (goto-char b)
  295:     (while (< (point) e)
  296:       (setq w (forth-next-word))
  297:       (setq t1 (string-match (regexp-quote (concat " " w " "))
  298: 			     forth-positives))
  299:       (setq t2 (string-match (regexp-quote (concat " " w " "))
  300: 			     forth-negatives))
  301:       (if t1
  302: 	  (setq sum (+ sum forth-indent-level)))
  303:       (if (and t2 (not first))
  304: 	  (setq sum (- sum forth-indent-level)))
  305:       (skip-chars-forward " \t")
  306:       (setq first nil))
  307:     sum))
  308: 
  309: 
  310: (defun forth-next-word ()
  311:   "Return the next forth-word. Skip anything that the forth-word takes from
  312: the input stream (comments, arguments, etc.)"
  313: ;actually, it would be better to use commands based on the
  314: ;syntax-table or comment-start etc.
  315:   (let ((w1 nil))
  316:     (while (not w1)
  317:       (skip-chars-forward " \t\n")
  318:       (let ((p (point)))
  319: 	(skip-chars-forward "^ \t\n")
  320: 	(setq w1 (buffer-substring p (point))))
  321:       (cond ((string-match "\"" w1)
  322: 	     (progn
  323: 	       (skip-chars-forward "^\"\n")
  324: 	       (forward-char)))
  325: 	    ((string-match "\\\\" w1)
  326: 	     (progn
  327: 	       (end-of-line)
  328: 	       ))
  329: 	    ((or (equal "(" w1) (equal ".(" w1))
  330: 	     (progn
  331: 	       (skip-chars-forward "^)\n")
  332: 	       (forward-char)))
  333: 	    ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)
  334: 	     (progn (skip-chars-forward " \t\n")
  335: 		    (skip-chars-forward "^ \t\n")))
  336: 	    (t nil)))
  337:     w1))
  338:       
  339: 
  340: ;; Forth commands
  341: 
  342: (defvar forth-program-name "gforth"
  343:   "*Program invoked by the `run-forth' command.")
  344: 
  345: (defvar forth-band-name nil
  346:   "*Band loaded by the `run-forth' command.")
  347: 
  348: (defvar forth-program-arguments nil
  349:   "*Arguments passed to the Forth program by the `run-forth' command.")
  350: 
  351: (defun run-forth (command-line)
  352:   "Run an inferior Forth process. Output goes to the buffer `*forth*'.
  353: With argument, asks for a command line. Split up screen and run forth 
  354: in the lower portion. The current-buffer when called will stay in the
  355: upper portion of the screen, and all other windows are deleted.
  356: Call run-forth again to make the *forth* buffer appear in the lower
  357: part of the screen."
  358:   (interactive
  359:    (list (let ((default
  360: 		 (or forth-process-command-line
  361: 		     (forth-default-command-line))))
  362: 	   (if current-prefix-arg
  363: 	       (read-string "Run Forth: " default)
  364: 	       default))))
  365:   (setq forth-process-command-line command-line)
  366:   (forth-start-process command-line)
  367:   (forth-split)
  368:   (forth-set-runlight forth-runlight:input))
  369: 
  370: (defun reset-forth ()
  371:   "Reset the Forth process."
  372:   (interactive)
  373:   (let ((process (get-process forth-program-name)))
  374:     (cond ((or (not process)
  375: 	       (not (eq (process-status process) 'run))
  376: 	       (yes-or-no-p
  377: "The Forth process is running, are you SURE you want to reset it? "))
  378: 	   (message "Resetting Forth process...")
  379: 	   (forth-reload)
  380: 	   (message "Resetting Forth process...done")))))
  381: 
  382: (defun forth-default-command-line ()
  383:   (concat forth-program-name " -emacs"
  384: 	  (if forth-program-arguments
  385: 	      (concat " " forth-program-arguments)
  386: 	      "")
  387: 	  (if forth-band-name
  388: 	      (concat " -band " forth-band-name)
  389: 	      "")))
  390: 
  391: ;;;; Internal Variables
  392: 
  393: (defvar forth-process-command-line nil
  394:   "Command used to start the most recent Forth process.")
  395: 
  396: (defvar forth-previous-send ""
  397:   "Most recent expression transmitted to the Forth process.")
  398: 
  399: (defvar forth-process-filter-queue '()
  400:   "Queue used to synchronize filter actions properly.")
  401: 
  402: (defvar forth-prompt "ok"
  403:   "The current forth prompt string.")
  404: 
  405: (defvar forth-start-hook nil
  406:   "If non-nil, a procedure to call when the Forth process is started.
  407: When called, the current buffer will be the Forth process-buffer.")
  408: 
  409: (defvar forth-signal-death-message nil
  410:   "If non-nil, causes a message to be generated when the Forth process dies.")
  411: 
  412: (defvar forth-percent-height 62
  413:   "Tells run-forth how high the upper window should be in percent.")
  414: 
  415: (defconst forth-runlight:input ?I
  416:   "The character displayed when the Forth process is waiting for input.")
  417: 
  418: (defvar forth-mode-string ""
  419:   "String displayed in the mode line when the Forth process is running.")
  420: 
  421: ;;;; Evaluation Commands
  422: 
  423: (defun forth-send-string (&rest strings)
  424:   "Send the string arguments to the Forth process.
  425: The strings are concatenated and terminated by a newline."
  426:   (cond ((forth-process-running-p)
  427: 	 (forth-send-string-1 strings))
  428: 	((yes-or-no-p "The Forth process has died.  Reset it? ")
  429: 	 (reset-forth)
  430: 	 (goto-char (point-max))
  431: 	 (forth-send-string-1 strings))))
  432: 
  433: (defun forth-send-string-1 (strings)
  434:   (let ((string (apply 'concat strings)))
  435:     (forth-send-string-2 string)))
  436: 
  437: (defun forth-send-string-2 (string)
  438:   (let ((process (get-process forth-program-name)))
  439:     (if (not (eq (current-buffer) (get-buffer forth-program-name)))
  440: 	(progn
  441: 	 (forth-process-filter-output string)
  442: 	 (forth-process-filter:finish)))
  443:     (send-string process (concat string "\n"))
  444:     (if (eq (current-buffer) (process-buffer process))
  445: 	(set-marker (process-mark process) (point)))))
  446: 
  447: 
  448: (defun forth-send-region (start end)
  449:   "Send the current region to the Forth process.
  450: The region is sent terminated by a newline."
  451:   (interactive "r")
  452:   (let ((process (get-process forth-program-name)))
  453:     (if (and process (eq (current-buffer) (process-buffer process)))
  454: 	(progn (goto-char end)
  455: 	       (set-marker (process-mark process) end))))
  456:   (forth-send-string "\n" (buffer-substring start end) "\n"))
  457: 
  458: (defun forth-end-of-paragraph ()
  459:   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
  460:   (if (not (re-search-forward "\n[ \t]*\n" nil t))
  461:       (goto-char (point-max))))
  462: 
  463: (defun forth-send-paragraph ()
  464:   "Send the current or the previous paragraph to the Forth process"
  465:   (interactive)
  466:   (let (end)
  467:     (save-excursion
  468:       (forth-end-of-paragraph)
  469:       (skip-chars-backward  "\t\n ")
  470:       (setq end (point))
  471:       (if (re-search-backward "\n[ \t]*\n" nil t)
  472: 	  (setq start (point))
  473: 	(goto-char (point-min)))
  474:       (skip-chars-forward  "\t\n ")
  475:       (forth-send-region (point) end))))
  476:   
  477: (defun forth-send-buffer ()
  478:   "Send the current buffer to the Forth process."
  479:   (interactive)
  480:   (if (eq (current-buffer) (forth-process-buffer))
  481:       (error "Not allowed to send this buffer's contents to Forth"))
  482:   (forth-send-region (point-min) (point-max)))
  483: 
  484: 
  485: ;;;; Basic Process Control
  486: 
  487: (defun forth-start-process (command-line)
  488:   (let ((buffer (get-buffer-create "*forth*")))
  489:     (let ((process (get-buffer-process buffer)))
  490:       (save-excursion
  491: 	(set-buffer buffer)
  492: 	(progn (if process (delete-process process))
  493: 	       (goto-char (point-max))
  494: 	       (setq mode-line-process '(": %s"))
  495: 	       (add-to-global-mode-string 'forth-mode-string)
  496: 	       (setq process
  497: 		     (apply 'start-process
  498: 			    (cons forth-program-name
  499: 				  (cons buffer
  500: 					(forth-parse-command-line
  501: 					 command-line)))))
  502: 	       (set-marker (process-mark process) (point-max))
  503: 	       (forth-process-filter-initialize t)
  504: 	       (forth-modeline-initialize)
  505: 	       (set-process-sentinel process 'forth-process-sentinel)
  506: 	       (set-process-filter process 'forth-process-filter)
  507: 	       (run-hooks 'forth-start-hook)))
  508:     buffer)))
  509: 
  510: (defun forth-parse-command-line (string)
  511:   (setq string (substitute-in-file-name string))
  512:   (let ((start 0)
  513: 	(result '()))
  514:     (while start
  515:       (let ((index (string-match "[ \t]" string start)))
  516: 	(setq start
  517: 	      (cond ((not index)
  518: 		     (setq result
  519: 			   (cons (substring string start)
  520: 				 result))
  521: 		     nil)
  522: 		    ((= index start)
  523: 		     (string-match "[^ \t]" string start))
  524: 		    (t
  525: 		     (setq result
  526: 			   (cons (substring string start index)
  527: 				 result))
  528: 		     (1+ index))))))
  529:     (nreverse result)))
  530: 
  531: 
  532: (defun forth-process-running-p ()
  533:   "True iff there is a Forth process whose status is `run'."
  534:   (let ((process (get-process forth-program-name)))
  535:     (and process
  536: 	 (eq (process-status process) 'run))))
  537: 
  538: (defun forth-process-buffer ()
  539:   (let ((process (get-process forth-program-name)))
  540:     (and process (process-buffer process))))
  541: 
  542: ;;;; Process Filter
  543: 
  544: (defun forth-process-sentinel (proc reason)
  545:   (let ((inhibit-quit nil))
  546:     (forth-process-filter-initialize (eq reason 'run))
  547:     (if (eq reason 'run)
  548: 	(forth-modeline-initialize)
  549: 	(setq forth-mode-string "")))
  550:   (if (and (not (memq reason '(run stop)))
  551: 	   forth-signal-death-message)
  552:       (progn (beep)
  553: 	     (message
  554: "The Forth process has died!  Do M-x reset-forth to restart it"))))
  555: 
  556: (defun forth-process-filter-initialize (running-p)
  557:   (setq forth-process-filter-queue (cons '() '()))
  558:   (setq forth-prompt "ok"))
  559: 
  560: 
  561: (defun forth-process-filter (proc string)
  562:   (forth-process-filter-output string)
  563:   (forth-process-filter:finish))
  564: 
  565: (defun forth-process-filter:enqueue (action)
  566:   (let ((next (cons action '())))
  567:     (if (cdr forth-process-filter-queue)
  568: 	(setcdr (cdr forth-process-filter-queue) next)
  569: 	(setcar forth-process-filter-queue next))
  570:     (setcdr forth-process-filter-queue next)))
  571: 
  572: (defun forth-process-filter:finish ()
  573:   (while (car forth-process-filter-queue)
  574:     (let ((next (car forth-process-filter-queue)))
  575:       (setcar forth-process-filter-queue (cdr next))
  576:       (if (not (cdr next))
  577: 	  (setcdr forth-process-filter-queue '()))
  578:       (apply (car (car next)) (cdr (car next))))))
  579: 
  580: ;;;; Process Filter Output
  581: 
  582: (defun forth-process-filter-output (&rest args)
  583:   (if (not (and args
  584: 		(null (cdr args))
  585: 		(stringp (car args))
  586: 		(string-equal "" (car args))))
  587:       (forth-process-filter:enqueue
  588:        (cons 'forth-process-filter-output-1 args))))
  589: 
  590: (defun forth-process-filter-output-1 (&rest args)
  591:   (save-excursion
  592:     (forth-goto-output-point)
  593:     (apply 'insert-before-markers args)))
  594: 
  595: (defun forth-guarantee-newlines (n)
  596:   (save-excursion
  597:     (forth-goto-output-point)
  598:     (let ((stop nil))
  599:       (while (and (not stop)
  600: 		  (bolp))
  601: 	(setq n (1- n))
  602: 	(if (bobp)
  603: 	    (setq stop t)
  604: 	  (backward-char))))
  605:     (forth-goto-output-point)
  606:     (while (> n 0)
  607:       (insert-before-markers ?\n)
  608:       (setq n (1- n)))))
  609: 
  610: (defun forth-goto-output-point ()
  611:   (let ((process (get-process forth-program-name)))
  612:     (set-buffer (process-buffer process))
  613:     (goto-char (process-mark process))))
  614: 
  615: (defun forth-modeline-initialize ()
  616:   (setq forth-mode-string "  "))
  617: 
  618: (defun forth-set-runlight (runlight)
  619:   (aset forth-mode-string 0 runlight)
  620:   (forth-modeline-redisplay))
  621: 
  622: (defun forth-modeline-redisplay ()
  623:   (save-excursion (set-buffer (other-buffer)))
  624:   (set-buffer-modified-p (buffer-modified-p))
  625:   (sit-for 0))
  626: 
  627: ;;;; Process Filter Operations
  628: 
  629: (defun add-to-global-mode-string (x)
  630:   (cond ((null global-mode-string)
  631: 	 (setq global-mode-string (list "" x " ")))
  632: 	((not (memq x global-mode-string))
  633: 	 (setq global-mode-string
  634: 	       (cons ""
  635: 		     (cons x
  636: 			   (cons " "
  637: 				 (if (equal "" (car global-mode-string))
  638: 				     (cdr global-mode-string)
  639: 				     global-mode-string))))))))
  640: 
  641: 
  642: ;; Misc
  643: 
  644: (setq auto-mode-alist (append auto-mode-alist
  645: 				'(("\\.fs$" . forth-mode))))
  646: 
  647: (defun forth-split ()
  648:   (interactive)
  649:   (forth-split-1 "*forth*"))
  650: 
  651: (defun forth-split-1 (buffer)
  652:   (if (not (eq (window-buffer) (get-buffer buffer)))
  653:       (progn
  654: 	(delete-other-windows)
  655: 	(split-window-vertically
  656: 	 (/ (* (screen-height) forth-percent-height) 100))
  657: 	(other-window 1)
  658: 	(switch-to-buffer buffer)
  659: 	(goto-char (point-max))
  660: 	(other-window 1))))
  661:     
  662: (defun forth-reload ()
  663:   (interactive)
  664:   (let ((process (get-process forth-program-name)))
  665:     (if process (kill-process process t)))
  666:   (sleep-for-millisecs 100)
  667:   (forth-mode))
  668: 
  669: 
  670: ;; Special section for forth-help
  671: 
  672: (defvar forth-help-buffer "*Forth-help*"
  673:   "Buffer used to display the requested documentation.")
  674: 
  675: (defvar forth-help-load-path nil
  676:   "List of directories to search through to find *.doc
  677:  (forth-help-file-suffix) files. Nil means current default directory.
  678:  The specified directories must contain at least one .doc file. If it
  679:  does not and you still want the load-path to scan that directory, create
  680:  an empty file dummy.doc.")
  681: 
  682: (defvar forth-help-file-suffix "*.doc"
  683:   "The file names to search for in each directory.")
  684: 
  685: (setq forth-search-command-prefix "grep -n \"^    [^(]* ")
  686: (defvar forth-search-command-suffix "/dev/null")
  687: (defvar forth-grep-error-regexp ": No such file or directory")
  688: 
  689: (defun forth-function-called-at-point ()
  690:   "Return the space delimited word a point."
  691:   (save-excursion
  692:     (save-restriction
  693:       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
  694:       (skip-chars-backward "^ \t\n" (point-min))
  695:       (if (looking-at "[ \t\n]")
  696: 	  (forward-char 1))
  697:       (let (obj (p (point)))
  698: 	(skip-chars-forward "^ \t\n")
  699: 	(buffer-substring p (point))))))
  700: 
  701: (defun forth-help-names-extend-comp (path-list result)
  702:   (cond ((null path-list) result)
  703: 	((null (car path-list))
  704: 	 (forth-help-names-extend-comp (cdr path-list) 
  705: 	       (concat result forth-help-file-suffix " ")))
  706: 	(t (forth-help-names-extend-comp
  707: 	    (cdr path-list) (concat result
  708: 				    (expand-file-name (car path-list)) "/"
  709: 				    forth-help-file-suffix " ")))))
  710: 
  711: (defun forth-help-names-extended ()
  712:   (if forth-help-load-path
  713:       (forth-help-names-extend-comp forth-help-load-path "")
  714:     (error "forth-help-load-path not specified")))
  715: 
  716: 
  717: (define-key forth-mode-map "\C-hf" 'forth-documentation)
  718: 
  719: (defun forth-documentation (function)
  720:   "Display the full documentation of FORTH word."
  721:   (interactive
  722:    (let ((fn (forth-function-called-at-point))
  723: 	 (enable-recursive-minibuffers t)	     
  724: 	 search-list
  725: 	 val)
  726:      (setq val (read-string (format "Describe forth word (default %s): " fn)))
  727:      (list (if (equal val "") fn val))))
  728:   (forth-get-doc (concat forth-search-command-prefix
  729: 			 (grep-regexp-quote (concat function " ("))
  730: 			 "[^)]*\-\-\" " (forth-help-names-extended)
  731: 			 forth-search-command-suffix))
  732:   (message "C-x C-m switches back to the forth interaction window"))
  733: 
  734: (defun forth-get-doc (command)
  735:   "Display the full documentation of command."
  736:   (let ((curwin (get-buffer-window (window-buffer)))
  737: 	reswin
  738: 	pointmax)
  739:     (with-output-to-temp-buffer forth-help-buffer
  740:       (progn
  741: 	(call-process "sh" nil forth-help-buffer t "-c" command)
  742: 	(setq reswin (get-buffer-window forth-help-buffer))))
  743:     (setq reswin (get-buffer-window forth-help-buffer))
  744:     (select-window reswin)
  745:     (save-excursion
  746:       (goto-char (setq pointmax (point-max)))
  747:       (insert "--------------------\n\n"))
  748:     (let (fd doc) 
  749:       (while (setq fd (forth-get-file-data pointmax))
  750: 	(setq doc (forth-get-doc-string fd))
  751: 	(save-excursion
  752: 	  (goto-char (point-max))
  753: 	  (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
  754: 		  ":\n\n" doc "\n")))
  755:       (if (not doc)
  756: 	  (progn (goto-char (point-max)) (insert "Not found"))))
  757:     (select-window curwin)))
  758:   
  759: (defun forth-skip-error-lines ()
  760:   (let ((lines 0))
  761:     (save-excursion
  762:       (while (re-search-forward forth-grep-error-regexp nil t)
  763: 	(beginning-of-line)
  764: 	(forward-line 1)
  765: 	(setq lines (1+ lines))))
  766:     (forward-line lines)))
  767: 
  768: (defun forth-get-doc-string (fd)
  769:   "Find file (car fd) and extract documentation from line (nth 1 fd)."
  770:   (let (result)
  771:     (save-window-excursion
  772:       (find-file (car fd))
  773:       (goto-line (nth 1 fd))
  774:       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
  775: 	  (error "forth-get-doc-string: serious error"))
  776:       (if (not (re-search-backward "\n[\t ]*\n" nil t))
  777: 	  (goto-char (point-min))
  778: 	(goto-char (match-end 0)))
  779:       (let ((p (point)))
  780: 	(if (not (re-search-forward "\n[\t ]*\n" nil t))
  781: 	    (goto-char (point-max)))
  782: 	(setq result (buffer-substring p (point))))
  783:       (bury-buffer (current-buffer)))
  784:     result))
  785: 
  786: (defun forth-get-file-data (limit)
  787:   "Parse grep output and return '(filename line#) list. Return nil when
  788:  passing limit."
  789:   (forth-skip-error-lines)
  790:   (if (< (point) limit)
  791:       (let ((result (forth-get-file-data-cont limit)))
  792: 	(forward-line 1)
  793: 	(beginning-of-line)
  794: 	result)))
  795: 
  796: (defun forth-get-file-data-cont (limit)
  797:   (let (result)
  798:     (let ((p (point)))
  799:       (skip-chars-forward "^:")
  800:       (setq result (buffer-substring p (point))))
  801:     (if (< (point) limit)
  802: 	(let ((p (1+ (point))))
  803: 	  (forward-char 1)
  804: 	  (skip-chars-forward "^:")
  805: 	  (list result (string-to-int (buffer-substring p (point))))))))
  806: 
  807: (defun grep-regexp-quote (str)
  808:   (let ((i 0) (m 1) (res ""))
  809:     (while (/= m 0)
  810:       (setq m (string-to-char (substring str i)))
  811:       (if (/= m 0)
  812: 	  (progn
  813: 	    (setq i (1+ i))
  814: 	    (if (string-match (regexp-quote (char-to-string m))
  815: 			      ".*\\^$[]")
  816: 		(setq res (concat res "\\")))
  817: 	    (setq res (concat res (char-to-string m))))))
  818:     res))
  819: 
  820: 
  821: (define-key forth-mode-map "\C-x\C-e" 'forth-compile)
  822: (define-key forth-mode-map "\C-x\C-n" 'next-error)
  823: (require 'compile "compile")
  824: 
  825: (defvar forth-compile-command "gforth ")
  826: (defvar forth-compilation-window-percent-height 30)
  827: 
  828: (defun forth-compile (command)
  829:   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
  830:   (forth-split-1 "*compilation*")
  831:   (setq ctools-compile-command command)
  832:   (compile1 ctools-compile-command "No more errors"))
  833: 
  834: 

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