--- gforth/gforth.el	2001/06/17 16:13:50	1.51
+++ gforth/gforth.el	2002/01/17 19:26:34	1.57
@@ -1,6 +1,6 @@
 ;;; gforth.el --- major mode for editing (G)Forth sources
 
-;; Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
+;; Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
 
 ;; This file is part of Gforth.
 
@@ -49,17 +49,67 @@
 
 ;;; Code:
 
- 
+;; Code ripped from `version.el' for compatability with Emacs versions
+;; prior to 19.23.
+(unless (boundp 'emacs-major-version)
+  (defconst emacs-major-version
+    (progn (string-match "^[0-9]+" emacs-version)
+	   (string-to-int (match-string 0 emacs-version)))))
+
+
+; todo:
+;
+
+; Wörter ordentlich hilighten, die nicht auf Whitespace beginnen ( ..)IF
+; -- mit aktueller Konzeption nicht möglich??
+;
+; Konfiguration über customization groups
+;
+; Bereich nur auf Wortanfang/ende ausweiten, wenn Anfang bzw Ende in einem 
+; Wort liegen (?) -- speed!
+;
+; 'forth-word' property muss eindeutig sein!
+;
+; Forth-Menu 
+;
+; Interface zu GForth Prozessen (Patches von Michael Scholz)
+;
+; Byte-compile-Code rausschmeißen, Compilieren im Makefile über Emacs
+; batch-Modus
+;
+; forth-help Kram rausschmeißen
+;
+; XEmacs Kompatibilität? imenu/speedbar -> fume?
+; 
+; Folding neuschreiben (neue Parser-Informationen benutzen)
 
 ;;; Hilighting and indentation engine				(dk)
 ;;;
+(require 'font-lock)
+
+(defvar forth-disable-parser nil
+  "*Non-nil means to disable on-the-fly parsing of Forth-code.
+
+This will disable hilighting of forth-mode buffers and will decrease
+the smartness of the indentation engine. Only set it to non-nil, if
+your computer is very slow. To disable hilighting, set
+`forth-hilight-level' to zero.")
+
+(defvar forth-jit-parser nil
+  "*Non-nil means to parse Forth-code just-in-time.
+
+This eliminates the need for initially parsing forth-mode buffers and
+thus speeds up loading of Forth files. That feature is only available
+in Emacs21 (and newer versions).")
 
 (defvar forth-words nil 
   "List of words for hilighting and recognition of parsed text areas. 
-You can enable hilighting of object-oriented Forth code, by appending either
-`forth-objects-words' or `forth-oof-words' to the list, depending on which
-OOP package you're using. After `forth-words' changed, `forth-compile-words' 
-must be called to make the changes take effect.
+
+Hilighting of object-oriented Forth code is achieved, by appending either
+`forth-objects-words' or `forth-oof-words' to the list, depending on the values of `forth-use-objects' or `forth-use-oof'.
+
+After `forth-words' changed, `forth-compile-words' must be called to
+make the changes take effect.
 
 Each item of `forth-words' has the form 
    (MATCHER TYPE HILIGHT . &optional PARSED-TEXT ...)
@@ -141,13 +191,15 @@ PARSED-TYPE specifies what kind of text
 
 	(("true" "false" "c/l" "bl" "cell" "pi" "w/o" "r/o" "r/w") 
 	 non-immediate (font-lock-constant-face . 2))
-	(("~~") compile-only (font-lock-warning-face . 2))
+	(("~~" "break:" "dbg") compile-only (font-lock-warning-face . 2))
+	(("break\"") compile-only (font-lock-warning-face . 1)
+	 "[\"\n]" nil string (font-lock-string-face . 1))
 	(("postpone" "[is]" "defers" "[']" "[compile]") 
 	 compile-only (font-lock-keyword-face . 2)
 	 "[ \t\n]" t name (font-lock-function-name-face . 3))
 	(("is" "what's") immediate (font-lock-keyword-face . 2)
 	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("<is>" "'") non-immediate (font-lock-keyword-face . 2)
+	(("<is>" "'" "see") non-immediate (font-lock-keyword-face . 2)
 	 "[ \t\n]" t name (font-lock-function-name-face . 3))
 	(("[to]") compile-only (font-lock-keyword-face . 2)
 	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
@@ -161,6 +213,7 @@ PARSED-TYPE specifies what kind of text
 	  "create-interpret/compile")
 	 non-immediate (font-lock-type-face . 2)
 	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
+	("\\S-+%" non-immediate (font-lock-type-face . 2))
 	(("defer" "alias" "create-interpret/compile:") 
 	 non-immediate (font-lock-type-face . 1)
 	 "[ \t\n]" t name (font-lock-function-name-face . 3))
@@ -173,59 +226,58 @@ PARSED-TYPE specifies what kind of text
 
 (defvar forth-use-objects nil 
   "*Non-nil makes forth-mode also hilight words from the \"Objects\" package.")
-(defvar forth-objects-words nil
+(defvar forth-objects-words
+  '(((":m") definition-starter (font-lock-keyword-face . 1)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("m:") definition-starter (font-lock-keyword-face . 1))
+    ((";m") definition-ender (font-lock-keyword-face . 1))
+    (("[current]" "[parent]") compile-only (font-lock-keyword-face . 1)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("current" "overrides") non-immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("[to-inst]") compile-only (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-variable-name-face . 3))
+    (("[bind]") compile-only (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-type-face . 3)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("bind") non-immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-type-face . 3)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("inst-var" "inst-value") non-immediate (font-lock-type-face . 2)
+     "[ \t\n]" t name (font-lock-variable-name-face . 3))
+    (("method" "selector")
+     non-immediate (font-lock-type-face . 1)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("end-class" "end-interface")
+     non-immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-type-face . 3))
+    (("public" "protected" "class" "exitm" "implementation" "interface"
+      "methods" "end-methods" "this") 
+     non-immediate (font-lock-keyword-face . 2))
+    (("object") non-immediate (font-lock-type-face . 2)))
   "Hilighting description for words of the \"Objects\" package")
-(setq forth-objects-words 
-      '(((":m") definition-starter (font-lock-keyword-face . 1)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("m:") definition-starter (font-lock-keyword-face . 1))
-	((";m") definition-ender (font-lock-keyword-face . 1))
-	(("[current]" "[parent]") compile-only (font-lock-keyword-face . 1)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("current" "overrides") non-immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("[to-inst]") compile-only (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
-	(("[bind]") compile-only (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-type-face . 3)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("bind") non-immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-type-face . 3)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("inst-var" "inst-value") non-immediate (font-lock-type-face . 2)
-	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
-	(("method" "selector")
-	 non-immediate (font-lock-type-face . 1)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("end-class" "end-interface")
-	 non-immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-type-face . 3))
-	(("public" "protected" "class" "exitm" "implementation" "interface"
-	  "methods" "end-methods" "this") 
-	 non-immediate (font-lock-keyword-face . 2))
-	(("object") non-immediate (font-lock-type-face . 2))))
+
 
 (defvar forth-use-oof nil 
   "*Non-nil makes forth-mode also hilight words from the \"OOF\" package.")
-(defvar forth-oof-words nil
+(defvar forth-oof-words 
+  '((("class") non-immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-type-face . 3))
+    (("var") non-immediate (font-lock-type-face . 2)
+     "[ \t\n]" t name (font-lock-variable-name-face . 3))
+    (("method" "early") non-immediate (font-lock-type-face . 2)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("::" "super" "bind" "bound" "link") 
+     immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-function-name-face . 3))
+    (("ptr" "asptr" "[]") 
+     immediate (font-lock-keyword-face . 2)
+     "[ \t\n]" t name (font-lock-variable-name-face . 3))
+    (("class;" "how:" "self" "new" "new[]" "definitions" "class?" "with"
+      "endwith")
+     non-immediate (font-lock-keyword-face . 2))
+    (("object") non-immediate (font-lock-type-face . 2)))
   "Hilighting description for words of the \"OOF\" package")
-(setq forth-oof-words 
-      '((("class") non-immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-type-face . 3))
-	(("var") non-immediate (font-lock-type-face . 2)
-	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
-	(("method") non-immediate (font-lock-type-face . 2)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("::" "super" "bind" "bound" "link") 
-	 immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-function-name-face . 3))
-	(("ptr" "asptr" "[]") 
-	 immediate (font-lock-keyword-face . 2)
-	 "[ \t\n]" t name (font-lock-variable-name-face . 3))
-	(("class;" "how:" "self" "new" "new[]" "definitions" "class?" "with"
-	  "endwith")
-	 non-immediate (font-lock-keyword-face . 2))
-	(("object") non-immediate (font-lock-type-face . 2))))
 
 (defvar forth-local-words nil 
   "List of Forth words to prepend to `forth-words'. Should be set by a 
@@ -240,27 +292,76 @@ PARSED-TYPE specifies what kind of text
 
 (defvar forth-compiled-words nil "Compiled representation of `forth-words'.")
 
+(defvar forth-indent-words nil 
+  "List of words that have indentation behaviour.
+Each element of `forth-indent-words' should have the form
+   (MATCHER INDENT1 INDENT2 &optional TYPE) 
+  
+MATCHER is either a list of strings to match, or a REGEXP.
+   If it's a REGEXP, it should not be surrounded by `\\<` or `\\>`, since 
+   that'll be done automatically by the search routines.
+
+TYPE might be omitted. If it's specified, the only allowed value is 
+   currently the symbol `non-immediate', meaning that the word will not 
+   have any effect on indentation inside definitions. (:NONAME is a good 
+   example for this kind of word).
 
-; todo:
-;
+INDENT1 specifies how to indent a word that's located at a line's begin,
+   following any number of whitespaces.
 
-; Wörter ordentlich hilighten, die nicht auf whitespace beginning ( ..)IF
-; Additional `forth-use-objects' or
-; `forth-use-oof' could be set to non-nil for automatical adding of those
-; word-lists. Using local variable list?
-;
-; Konfiguration über customization groups
-;
-; Bereich nur auf Wortanfang/ende ausweiten, wenn anfang bzw ende in einem 
-; Wort liegen (?) -- speed!
-;
-; User interface
-;
-; 'forth-word' property muss eindeutig sein!
-;
-; imenu support schlauer machen
+INDENT2 specifies how to indent words that are not located at a line's begin.
 
-(setq debug-on-error t)
+INDENT1 and INDENT2 are indentation specifications of the form
+   (SELF-INDENT . NEXT-INDENT), where SELF-INDENT is a numerical value, 
+   specifying how the matching line and all following lines are to be 
+   indented, relative to previous lines. NEXT-INDENT specifies how to indent 
+   following lines, relative to the matching line.
+  
+   Even values of SELF-INDENT and NEXT-INDENT correspond to multiples of
+   `forth-indent-level'. Odd values get an additional 
+   `forth-minor-indent-level' added/substracted. Eg a value of -2 indents
+   1 * forth-indent-level  to the left, wheras 3 indents 
+   1 * forth-indent-level + forth-minor-indent-level  columns to the right.")
+
+(setq forth-indent-words
+      '((("if" "begin" "do" "?do" "+do" "-do" "u+do"
+	  "u-do" "?dup-if" "?dup-0=-if" "case" "of" "try" 
+	  "[if]" "[ifdef]" "[ifundef]" "[begin]" "[for]" "[do]" "[?do]")
+	 (0 . 2) (0 . 2))
+	((":" ":noname" "code" "struct" "m:" ":m" "class" "interface")
+	 (0 . 2) (0 . 2) non-immediate)
+	("\\S-+%$" (0 . 2) (0 . 0) non-immediate)
+	((";" ";m") (-2 . 0) (0 . -2))
+	(("again" "repeat" "then" "endtry" "endcase" "endof" 
+	  "[then]" "[endif]" "[loop]" "[+loop]" "[next]" 
+	  "[until]" "[repeat]" "[again]" "loop")
+	 (-2 . 0) (0 . -2))
+	(("end-code" "end-class" "end-interface" "end-class-noname" 
+	  "end-interface-noname" "end-struct" "class;")
+	 (-2 . 0) (0 . -2) non-immediate)
+	(("protected" "public" "how:") (-1 . 1) (0 . 0) non-immediate)
+	(("+loop" "-loop" "until") (-2 . 0) (-2 . 0))
+	(("else" "recover" "[else]") (-2 . 2) (0 . 0))
+	(("while" "does>" "[while]") (-1 . 1) (0 . 0))
+	(("\\g") (-2 . 2) (0 . 0))))
+
+(defvar forth-local-indent-words nil 
+  "List of Forth words to prepend to `forth-indent-words', when a forth-mode
+buffer is created. Should be set by a Forth source, using a local variables 
+list at the end of the file (\"Local Variables: ... forth-local-words: ... 
+End:\" construct).")
+
+(defvar forth-custom-indent-words nil
+  "List of Forth words to prepend to `forth-indent-words'. Should be set in
+ your .emacs.")
+
+(defvar forth-indent-level 4
+  "*Indentation of Forth statements.")
+(defvar forth-minor-indent-level 2
+  "*Minor indentation of Forth statements.")
+(defvar forth-compiled-indent-words nil)
+
+;(setq debug-on-error t)
 
 ;; Filter list by predicate. This is a somewhat standard function for 
 ;; functional programming languages. So why isn't it already implemented 
@@ -390,7 +491,8 @@ PARSED-TYPE specifies what kind of text
 ;; Delete all properties, used by Forth mode, from `from' to `to'.
 (defun forth-delete-properties (from to)
   (remove-text-properties 
-   from to '(face nil forth-parsed nil forth-word nil forth-state nil)))
+   from to '(face nil fontified nil 
+		  forth-parsed nil forth-word nil forth-state nil)))
 
 ;; Get the index of the branch of the most recently evaluated regular 
 ;; expression that matched. (used for identifying branches "a\\|b\\|c...")
@@ -469,6 +571,7 @@ PARSED-TYPE specifies what kind of text
       (setq state (get-text-property (point) 'forth-state))
       (setq last-location (point))
       (forth-delete-properties (point) to)
+      (put-text-property (point) to 'fontified t)
       ;; hilight loop...
       (while (setq word-descr (forth-next-known-forth-word to))
 	(when loudly
@@ -512,12 +615,19 @@ PARSED-TYPE specifies what kind of text
 ;; and stuff like that.
 (defun forth-change-function (from to len &optional loudly)
   (save-match-data
-    (forth-save-buffer-state () 
-     (unwind-protect 
-	 (progn 
-	   (forth-update-properties from to loudly)
-	   (forth-update-show-screen)
-	   (forth-update-warn-long-lines))))))
+    (forth-save-buffer-state 
+     () 
+     (unless forth-disable-parser (forth-update-properties from to loudly))
+     (forth-update-warn-long-lines))))
+
+(defun forth-fontification-function (from)
+  "Function to be called from `fontification-functions' of Emacs 21."
+  (save-match-data
+    (forth-save-buffer-state
+     ((to (min (point-max) (+ from 100))))
+     (unless (or forth-disable-parser (not forth-jit-parser)
+		 (get-text-property from 'fontified))
+       (forth-update-properties from to)))))
 
 (eval-when-compile
   (byte-compile 'forth-set-word-properties)
@@ -528,37 +638,45 @@ PARSED-TYPE specifies what kind of text
 
 ;;; imenu support
 ;;;
+(defvar forth-defining-words 
+  '("VARIABLE" "CONSTANT" "2VARIABLE" "2CONSTANT" "FVARIABLE" "FCONSTANT"
+   "USER" "VALUE" "field" "end-struct" "VOCABULARY" "CREATE" ":" "CODE"
+   "DEFER" "ALIAS")
+  "List of words, that define the following word.
+Used for imenu index generation.")
+
+(defvar forth-defining-words-regexp nil 
+  "Regexp that's generated for matching `forth-defining-words'")
+ 
 (defun forth-next-definition-starter ()
   (progn
-    (let* ((regexp (car forth-compiled-defining-words))
-	   (pos (re-search-forward regexp (point-max) t)))
-      (message "regexp: %s pos:%s" regexp pos)
+    (let* ((pos (re-search-forward forth-defining-words-regexp (point-max) t)))
       (if pos
 	  (if (or (text-property-not-all (match-beginning 0) (match-end 0) 
-					  'forth-parsed nil)
-		   (text-property-not-all (match-beginning 0) (match-end 0)
-					  'forth-state nil)) 
+					 'forth-parsed nil)
+		  (text-property-not-all (match-beginning 0) (match-end 0)
+					 'forth-state nil)) 
 	      (forth-next-definition-starter)
 	    t)
 	nil))))
 
 (defun forth-create-index ()
-  (let* ((defwords 
-	  (forth-filter (lambda (word) 
-			  (and (eq (nth 1 word) 'definition-starter)
-			       (> (length word) 3)))
-			forth-words))
-	 (forth-compiled-defining-words (forth-compile-wordlist defwords))
+  (let* ((forth-defining-words-regexp 
+	  (concat "\\<\\(" (regexp-opt forth-defining-words) "\\)\\>"))
 	 (index nil))
     (goto-char (point-min))
     (while (forth-next-definition-starter)
       (if (looking-at "[ \t]*\\([^ \t\n]+\\)")
 	  (setq index (cons (cons (match-string 1) (point)) index))))
-    (message "index: %s" index)
     index))
 
-(speedbar-add-supported-extension ".fs")
-(speedbar-add-supported-extension ".fb")
+;; top-level require is executed at byte-compile and load time
+(require 'speedbar nil t)
+
+;; this code is executed at load-time only
+(when (require 'speedbar nil t)
+  (speedbar-add-supported-extension ".fs")
+  (speedbar-add-supported-extension ".fb"))
 
 ;; (require 'profile)
 ;; (setq profile-functions-list '(forth-set-word-properties forth-next-known-forth-word forth-update-properties forth-delete-properties forth-get-regexp-branch))
@@ -566,67 +684,6 @@ PARSED-TYPE specifies what kind of text
 ;;; Indentation
 ;;;
 
-(defvar forth-indent-words nil 
-  "List of words that have indentation behaviour.
-Each element of `forth-indent-words' should have the form
-   (MATCHER INDENT1 INDENT2) 
-  
-MATCHER is either a list of strings to match, or a REGEXP.
-   If it's a REGEXP, it should not be surrounded by `\\<` or `\\>`, since 
-   that'll be done automatically by the search routines.
-
-INDENT1 specifies how to indent a word that's located at a line's begin,
-   following any number of whitespaces.
-
-INDENT2 specifies how to indent words that are not located at a line's begin.
-
-INDENT1 and INDENT2 are indentation specifications of the form
-   (SELF-INDENT . NEXT-INDENT), where SELF-INDENT is a numerical value, 
-   specifying how the matching line and all following lines are to be 
-   indented, relative to previous lines. NEXT-INDENT specifies how to indent 
-   following lines, relative to the matching line.
-  
-   Even values of SELF-INDENT and NEXT-INDENT correspond to multiples of
-   `forth-indent-level'. Odd values get an additional 
-   `forth-minor-indent-level' added/substracted. Eg a value of -2 indents
-   1 * forth-indent-level  to the left, wheras 3 indents 
-   1 * forth-indent-level + forth-minor-indent-level  columns to the right.")
-
-(setq forth-indent-words
-      '(((":" ":noname" "code" "if" "begin" "do" "?do" "+do" "-do" "u+do"
-	  "u-do" "?dup-if" "?dup-0=-if" "case" "of" "try" "struct" 
-	  "[if]" "[ifdef]" "[ifundef]" "[begin]" "[for]" "[do]" "[?do]"
-	  "class" "interface" "m:" ":m")
-	 (0 . 2) (0 . 2))
-	((";" ";m") (-2 . 0) (0 . -2))
-	(("end-code" "again" "repeat" "then" "endtry" "endcase" "endof" 
-	  "end-struct" "[then]" "[endif]" "[loop]" "[+loop]" "[next]" 
-	  "[until]" "[repeat]" "[again]" "end-class" "end-interface"
-	  "end-class-noname" "end-interface-noname" "loop"
-	  "class;")
-	 (-2 . 0) (0 . -2))
-	(("protected" "public" "how:") (-1 . 1) (0 . 0))
-	(("+loop" "-loop" "until") (-2 . 0) (-2 . 0))
-	(("else" "recover" "[else]") (-2 . 2) (0 . 0))
-	(("while" "does>" "[while]") (-1 . 1) (0 . 0))
-	(("\\g") (-2 . 2) (0 . 0))))
-
-(defvar forth-local-indent-words nil 
-  "List of Forth words to prepend to `forth-indent-words', when a forth-mode
-buffer is created. Should be set by a Forth source, using a local variables 
-list at the end of the file (\"Local Variables: ... forth-local-words: ... 
-End:\" construct).")
-
-(defvar forth-custom-indent-words nil
-  "List of Forth words to prepend to `forth-indent-words'. Should be set in
- your .emacs.")
-
-(defvar forth-indent-level 4
-  "Indentation of Forth statements.")
-(defvar forth-minor-indent-level 2
-  "Minor indentation of Forth statements.")
-(defvar forth-compiled-indent-words nil)
-
 ;; Return, whether `pos' is the first forth word on its line
 (defun forth-first-word-on-line-p (pos)
   (save-excursion
@@ -644,12 +701,19 @@ End:\" construct).")
 	(let* ((regexp (car forth-compiled-indent-words))
 	       (pos (re-search-forward regexp to t)))
 	  (if pos
-	      (if (text-property-not-all (match-beginning 0) (match-end 0) 
-					 'forth-parsed nil)
-		  (forth-next-known-indent-word to)
-		(let* ((branch (forth-get-regexp-branch))
-		       (descr (cdr forth-compiled-indent-words))
-		       (indent (cdr (assoc branch descr))))
+	      (let* ((start (match-beginning 0))
+		     (end (match-end 0))
+		     (branch (forth-get-regexp-branch))
+		     (descr (cdr forth-compiled-indent-words))
+		     (indent (cdr (assoc branch descr)))
+		     (type (nth 2 indent)))
+		;; skip words that are parsed (strings/comments) and 
+		;; non-immediate words inside definitions
+		(if (or (text-property-not-all start end 'forth-parsed nil)
+			(and (eq type 'non-immediate) 
+			     (text-property-not-all start end 
+						    'forth-state nil)))
+		    (forth-next-known-indent-word to)
 		  (if (forth-first-word-on-line-p (match-beginning 0))
 		      (nth 0 indent) (nth 1 indent))))
 	    nil)))
@@ -697,8 +761,7 @@ End:\" construct).")
 (defun forth-get-anchor-column ()
   (save-excursion
     (if (/= 0 (forward-line -1)) 0
-      (let ((next-indent)
-	    (self-indent))
+      (let ((indent))
 	(while (not (or (setq indent (forth-get-column-incr 1))
 			(<= (point) (point-min))))
 	  (forward-line -1))
@@ -861,7 +924,7 @@ done by checking whether the first line
   (save-restriction 
     (widen)
     (save-excursion
-       (beginning-of-buffer)
+       (goto-char (point-min))
        (end-of-line)
        (>= (current-column) 1024))))
 
@@ -885,6 +948,7 @@ done by checking whether the first line
   "Non-nil means to warn about lines that are longer than 64 characters")
 
 (defvar forth-screen-marker nil)
+(defvar forth-screen-number-string nil)
 
 (defun forth-update-show-screen ()
   "If `forth-show-screen' is non-nil, put overlay arrow to start of screen, 
@@ -914,6 +978,13 @@ exceeds 64 characters."
 	       forth-c/l))))
 
 (add-hook 'forth-motion-hooks 'forth-update-warn-long-lines)
+
+(defvar forth-was-point nil)
+(defun forth-check-motion ()
+  "Run `forth-motion-hooks', if `point' changed since last call."
+  (when (or (eq forth-was-point nil) (/= forth-was-point (point)))
+    (setq forth-was-point (point))
+    (run-hooks 'forth-motion-hooks)))
     
 ;;; End block file editing
 
@@ -941,57 +1012,26 @@ exceeds 64 characters."
 (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
 (define-key forth-mode-map "\e." 'forth-find-tag)
 
-;;; hook into motion events (realy ugly!)  (dk)
-(define-key forth-mode-map "\C-n" 'forth-next-line)
-(define-key forth-mode-map "\C-p" 'forth-previous-line)
-(define-key forth-mode-map [down] 'forth-next-line)
-(define-key forth-mode-map [up] 'forth-previous-line)
-(define-key forth-mode-map "\C-f" 'forth-forward-char)
-(define-key forth-mode-map "\C-b" 'forth-backward-char)
-(define-key forth-mode-map [right] 'forth-forward-char)
-(define-key forth-mode-map [left] 'forth-backward-char)
-(define-key forth-mode-map "\M-f" 'forth-forward-word)
-(define-key forth-mode-map "\M-b" 'forth-backward-word)
-(define-key forth-mode-map [C-right] 'forth-forward-word)
-(define-key forth-mode-map [C-left] 'forth-backward-word)
-(define-key forth-mode-map "\M-v" 'forth-scroll-down)
-(define-key forth-mode-map "\C-v" 'forth-scroll-up)
-(define-key forth-mode-map [prior] 'forth-scroll-down)
-(define-key forth-mode-map [next] 'forth-scroll-up)
-
-(defun forth-next-line (arg) 
-  (interactive "p") (next-line arg) (run-hooks 'forth-motion-hooks))
-(defun forth-previous-line (arg)
-  (interactive "p") (previous-line arg) (run-hooks 'forth-motion-hooks))
-(defun forth-backward-char (arg)
-  (interactive "p") (backward-char arg) (run-hooks 'forth-motion-hooks))
-(defun forth-forward-char (arg)
-  (interactive "p") (forward-char arg) (run-hooks 'forth-motion-hooks))
-(defun forth-forward-word (arg)
-  (interactive "p") (forward-word arg) (run-hooks 'forth-motion-hooks))
-(defun forth-backward-word (arg)
-  (interactive "p") (backward-word arg) (run-hooks 'forth-motion-hooks))
-(defun forth-scroll-down (arg)
-  (interactive "P") (scroll-down arg) (run-hooks 'forth-motion-hooks))
-(defun forth-scroll-up (arg)
-  (interactive "P") (scroll-up arg) (run-hooks 'forth-motion-hooks))
-
 ;setup for C-h C-i to work
-(if (fboundp 'info-lookup-add-help)
-    (info-lookup-add-help
-     :topic 'symbol
-     :mode 'forth-mode
-     :regexp "[^ 	
+(require 'info-look nil t)
+(when (require 'info-look nil t)
+  (info-lookup-add-help
+   :topic 'symbol
+   :mode 'forth-mode
+   :regexp "[^ 	
 ]+"
-     :ignore-case t
-     :doc-spec '(("(gforth)Name Index" nil "`" "'  "))))
+   :ignore-case t
+   :doc-spec '(("(gforth)Name Index" nil "`" "'  "))))
 
-(load "etags")
+(require 'etags)
 
 (defun forth-find-tag (tagname &optional next-p regexp-p)
   (interactive (find-tag-interactive "Find tag: "))
+  (unless (or regexp-p next-p)
+    (setq tagname (concat "\\(^\\|\\s-\\)\\(" (regexp-quote tagname) 
+			    "\\)\\(\\s-\\|$\\)")))
   (switch-to-buffer
-   (find-tag-noselect (concat " " tagname " ") next-p regexp-p)))
+   (find-tag-noselect tagname next-p t)))
 
 (defvar forth-mode-syntax-table nil
   "Syntax table in use in Forth-mode buffers.")
@@ -1032,16 +1072,19 @@ exceeds 64 characters."
   (setq comment-column 40)
   (make-local-variable 'comment-start-skip)
   (setq comment-start-skip "\\ ")
-  (make-local-variable 'comment-indent-hook)
-  (setq comment-indent-hook 'forth-comment-indent)
+  (make-local-variable 'comment-indent-function)
+  (setq comment-indent-function 'forth-comment-indent)
   (make-local-variable 'parse-sexp-ignore-comments)
   (setq parse-sexp-ignore-comments t)
   (setq case-fold-search t)
+  (make-local-variable 'forth-was-point)
+  (setq forth-was-point -1)
   (make-local-variable 'forth-words)
   (make-local-variable 'forth-compiled-words)
   (make-local-variable 'forth-compiled-indent-words)
   (make-local-variable 'forth-hilight-level)
   (make-local-variable 'after-change-functions)
+  (make-local-variable 'post-command-hook)
   (make-local-variable 'forth-show-screen)
   (make-local-variable 'forth-screen-marker)
   (make-local-variable 'forth-warn-long-lines)
@@ -1050,6 +1093,9 @@ exceeds 64 characters."
   (make-local-variable 'forth-use-objects) 
   (setq forth-screen-marker (copy-marker 0))
   (add-hook 'after-change-functions 'forth-change-function)
+  (add-hook 'post-command-hook 'forth-check-motion)
+  (if (>= emacs-major-version 21)
+      (add-hook 'fontification-functions 'forth-fontification-function))
   (setq imenu-create-index-function 'forth-create-index))
 
 ;;;###autoload
@@ -1093,7 +1139,7 @@ Variables controlling syntax hilighting/
     .emacs, or by setting forth-local-words, in source-files' local 
     variables lists.
  forth-use-objects
-    Set this variable to non-nil in your .emacs, or a local variables 
+    Set this variable to non-nil in your .emacs, or in a local variables 
     list, to hilight and recognize the words from the \"Objects\" package 
     for object-oriented programming.
  forth-use-oof
@@ -1212,7 +1258,8 @@ bell during block file read/write operat
 	 (forth-hack-local-variables)
 	 (forth-customize-words)
 	 (forth-compile-words)
-	 (forth-change-function (point-min) (point-max) nil t)))
+	 (unless (and forth-jit-parser (>= emacs-major-version 21))
+	   (forth-change-function (point-min) (point-max) nil t))))
 
 (defun forth-fill-paragraph () 
   "Fill comments (starting with '\'; do not fill code (block style
@@ -1737,7 +1784,7 @@ The region is sent terminated by a newli
 
 (define-key forth-mode-map "\C-x\C-e" 'compile)
 (define-key forth-mode-map "\C-x\C-n" 'next-error)
-(require 'compile "compile")
+(require 'compile)
 
 (defvar forth-compile-command "gforth ")
 ;(defvar forth-compilation-window-percent-height 30)
@@ -1789,24 +1836,23 @@ The region is sent terminated by a newli
 (require 'outline)
 
 (defun f-outline-level ()
-	(cond	((looking-at "\\`\\\\")
-			0)
-		((looking-at "\\\\ SEC")
-			0)
-		((looking-at "\\\\ \\\\ .*")
-			0)
-		((looking-at "\\\\ DEFS")
-			1)
-		((looking-at "\\/\\* ")
-			1)
-		((looking-at ": .*")
-			1)
-		((looking-at "\\\\G")
-			2)
-		((looking-at "[ \t]+\\\\")
-			3))
-)			
-
+  (cond	((looking-at "\\`\\\\")
+	 0)
+	((looking-at "\\\\ SEC")
+	 0)
+	((looking-at "\\\\ \\\\ .*")
+	 0)
+	((looking-at "\\\\ DEFS")
+	 1)
+	((looking-at "\\/\\* ")
+	 1)
+	((looking-at ": .*")
+	 1)
+	((looking-at "\\\\G")
+	 2)
+	((looking-at "[ \t]+\\\\")
+	 3)))
+  
 (defun fold-f  ()
    (interactive)
    (add-hook 'outline-minor-mode-hook 'hide-body)
@@ -1820,9 +1866,7 @@ The region is sent terminated by a newli
    (define-key outline-minor-mode-map '(shift up) 'hide-sublevels)
    (define-key outline-minor-mode-map '(shift right) 'show-children)
    (define-key outline-minor-mode-map '(shift left) 'hide-subtree)
-   (define-key outline-minor-mode-map '(shift down) 'show-subtree)
-
-)
+   (define-key outline-minor-mode-map '(shift down) 'show-subtree))
 
 ;;(define-key global-map '(shift up) 'fold-f)
 
@@ -1842,4 +1886,6 @@ The region is sent terminated by a newli
 ;       (define-key global-map '(shift button3) 'mouse-function-menu)
 ))
 
+(provide 'forth-mode)
+
 ;;; gforth.el ends here