;;; ebnf2ps.el --- translate an EBNF to a syntactic chart on PostScript
-;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004
+;; Free Software Foundation, Inc.
-;; Author: Vinicius Jose Latorre <vinicius@cpqd.com.br>
-;; Maintainer: Vinicius Jose Latorre <vinicius@cpqd.com.br>
+;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
+;; Maintainer: Vinicius Jose Latorre <viniciusjl@ig.com.br>
+;; Time-stamp: <2004/02/24 20:48:53 vinicius>
;; Keywords: wp, ebnf, PostScript
-;; Time-stamp: <2003/08/08 23:09:36 vinicius>
-;; Version: 3.6.1
+;; Version: 4.0
;; X-URL: http://www.cpqd.com.br/~vinicius/emacs/
;; This file is part of GNU Emacs.
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
-(defconst ebnf-version "3.6.1"
- "ebnf2ps.el, v 3.6.1 <2001/09/24 vinicius>
+(defconst ebnf-version "4.0"
+ "ebnf2ps.el, v 4.0 <2004/02/24 vinicius>
Vinicius's last change version. When reporting bugs, please also
report the version of Emacs, if any, that ebnf2ps was running with.
Please send all bug fixes and enhancements to
- Vinicius Jose Latorre <vinicius@cpqd.com.br>.
+ Vinicius Jose Latorre <viniciusjl@ig.com.br>.
")
;; ebnf2ps provides six commands for generating PostScript syntactic chart
;; images of Emacs buffers:
;;
+;; ebnf-print-directory
+;; ebnf-print-file
;; ebnf-print-buffer
;; ebnf-print-region
+;; ebnf-spool-directory
+;; ebnf-spool-file
;; ebnf-spool-buffer
;; ebnf-spool-region
+;; ebnf-eps-directory
+;; ebnf-eps-file
;; ebnf-eps-buffer
;; ebnf-eps-region
;;
;; you'll be asked to confirm the exit; this is modeled on the confirmation
;; that Emacs uses for modified buffers.
;;
-;; The word "buffer" or "region" in the command name determines how much of the
-;; buffer is printed:
+;; The word "directory", "file", "buffer" or "region" in the command name
+;; determines how much of the buffer is printed:
;;
-;; buffer - Print the entire buffer.
+;; directory - Read files in the directory and print them.
;;
-;; region - Print just the current region.
+;; file - Read file and print it.
+;;
+;; buffer - Print the entire buffer.
+;;
+;; region - Print just the current region.
;;
;; Two ebnf- command examples:
;;
;; spool the image in Emacs to send to the printer
;; later.
;;
-;; Note that `ebnf-eps-buffer' and `ebnf-eps-region' never spool the EPS image,
-;; so they don't use the ps-print spooling mechanism. See section "Actions in
-;; Comments" for an explanation about EPS file generation.
+;; Note that `ebnf-eps-directory', `ebnf-eps-file', `ebnf-eps-buffer' and
+;; `ebnf-eps-region' never spool the EPS image, so they don't use the ps-print
+;; spooling mechanism. See section "Actions in Comments" for an explanation
+;; about EPS file generation.
;;
;;
;; Invoking Ebnf2ps
;; .
;;
;; non_terminal = "[!#%&'*-,0-:<>@-Z\\\\^-z~\\240-\\377]+".
+;; ;; that is, a valid non_terminal accepts decimal digits, letters (upper
+;; ;; and lower), 8-bit accentuated characters,
+;; ;; "!", "#", "%", "&", "'", "*", "+", ",", ":",
+;; ;; "<", ">", "@", "\", "^", "_", "`" and "~".
;;
;; terminal = "\\([^\"\\]\\|\\\\[ -~\\240-\\377]\\)+".
+;; ;; that is, a valid terminal accepts any printable character (including
+;; ;; 8-bit accentuated characters) except `"', as `"' is used to delimit a
+;; ;; terminal. Also, accepts escaped characters, that is, a character
+;; ;; pair starting with `\' followed by a printable character, for
+;; ;; example: \", \\.
;;
-;; special = "[^?\\n\\000-\\010\\016-\\037\\177-\\237]*".
+;; special = "[^?\\000-\\010\\012-\\037\\177-\\237]*".
+;; ;; that is, a valid special accepts any printable character (including
+;; ;; 8-bit accentuated characters) and tabs except `?', as `?' is used to
+;; ;; delimit a special.
;;
;; integer = "[0-9]+".
+;; ;; that is, an integer is a sequence of one or more decimal digits.
;;
;; comment = ";" "[^\\n\\000-\\010\\016-\\037\\177-\\237]*" "\\n".
+;; ;; that is, a comment starts with the character `;' and terminates at end
+;; ;; of line. Also, it only accepts printable characters (including 8-bit
+;; ;; accentuated characters) and tabs.
;;
;; Try to use the above EBNF to test ebnf2ps.
;;
;; `ebnf-terminal-regexp', `ebnf-case-fold-search',
;; `ebnf-lex-comment-char' and `ebnf-lex-eop-char'.
;;
+;; `abnf' ebnf2ps recognizes the syntax described in the URL:
+;; `http://www.faqs.org/rfcs/rfc2234.html'
+;; ("Augmented BNF for Syntax Specifications: ABNF").
+;;
;; `iso-ebnf' ebnf2ps recognizes the syntax described in the URL:
;; `http://www.cl.cam.ac.uk/~mgk25/iso-ebnf.html'
;; ("International Standard of the ISO EBNF Notation").
;;
;; `ebnf-terminal-border-color' Specify border color for terminal box.
;;
+;; `ebnf-production-name-p' Non-nil means production name will be
+;; printed.
+;;
;; `ebnf-sort-production' Specify how productions are sorted.
;;
;; `ebnf-production-font' Specify production font.
;; `ebnf-non-terminal-border-color' Specify border color for non-terminal
;; box.
;;
+;; `ebnf-special-show-delimiter' Non-nil means special delimiter
+;; (character `?') is shown.
+;;
;; `ebnf-special-font' Specify special font.
;;
;; `ebnf-special-shape' Specify special box shape.
;; default terminal, non-terminal or
;; special.
;;
+;; `ebnf-file-suffix-regexp' Specify file name suffix that contains
+;; EBNF.
+;;
;; `ebnf-eps-prefix' Specify EPS prefix file name.
;;
;; `ebnf-use-float-format' Non-nil means use `%f' float format.
;;
+;; `ebnf-stop-on-error' Non-nil means signal error and stop.
+;; Nil means signal error and continue.
+;;
;; `ebnf-yac-ignore-error-recovery' Non-nil means ignore error recovery.
;;
;; `ebnf-ignore-empty-rule' Non-nil means ignore empty rules.
;; `ebnf-insert-style' Insert a new style NAME with inheritance INHERITS and
;; values VALUES.
;;
+;; `ebnf-delete-style' Delete style NAME.
+;;
;; `ebnf-merge-style' Merge values of style NAME with style VALUES.
;;
-;; `ebnf-apply-style' Set STYLE to current style.
+;; `ebnf-apply-style' Set STYLE as the current style.
;;
;; `ebnf-reset-style' Reset current style.
;;
-;; `ebnf-push-style' Push the current style and set STYLE to current style.
+;; `ebnf-push-style' Push the current style and set STYLE as the current
+;; style.
;;
-;; `ebnf-pop-style' Pop a style and set it to current style.
+;; `ebnf-pop-style' Pop a style and set it as the current style.
;;
-;; These commands helps to put together a lot of variable settings in a group
+;; These commands help to put together a lot of variable settings in a group
;; and name this group. So when you wish to apply these settings it's only
;; needed to give the name.
;;
-;; There is also a notion of simple inheritance of style; so if you declare
+;; There is also a notion of simple inheritance of style; so, if you declare
;; that a style A inherits from a style B, all settings of B is applied first
;; and then the settings of A is applied. This is useful when you wish to
;; modify some aspects of an existing style, but at same time wish to keep it
;; Acknowledgements
;; ----------------
;;
+;; Thanks to Drew Adams <?@?> for suggestions:
+;; - `ebnf-production-name-p', `ebnf-stop-on-error',
+;; `ebnf-file-suffix-regexp'and `ebnf-special-show-delimiter' variables.
+;; - `ebnf-delete-style', `ebnf-eps-file' and `ebnf-eps-directory'
+;; commands.
+;; - some docs fix.
+;;
+;; Thanks to Matthew K. Junker <junker@alum.mit.edu> for the suggestion to deal
+;; with some Bison features (%right, %left and %prec pragmas). His suggestion
+;; was extended to deal with %nonassoc pragma too.
+;;
;; Thanks to all who emailed comments.
;;
;;
:group 'ebnf-displacement)
+(defcustom ebnf-special-show-delimiter t
+ "*Non-nil means special delimiter (character `?') is shown."
+ :type 'boolean
+ :group 'ebnf-special)
+
+
(defcustom ebnf-special-font '(7 Courier "Black" "Gray95" bold italic)
"*Specify special font.
:group 'ebnf-terminal)
+(defcustom ebnf-production-name-p t
+ "*Non-nil means production name will be printed."
+ :type 'boolean
+ :group 'ebnf-production)
+
+
(defcustom ebnf-sort-production nil
"*Specify how productions are sorted.
|*
*
+ `semi-up-hollow' `semi-up-full'
+ * *
+ |* |*
+ | * |X*
+ ==+==* ==+==*
+
+ `semi-down-hollow' `semi-down-full'
+ ==+==* ==+==*
+ | * |X*
+ |* |*
+ * *
+
`user' See also documentation for variable `ebnf-user-arrow'.
Any other value is treated as `none'."
:type '(radio :tag "Arrow Shape"
- (const none) (const semi-up)
- (const semi-down) (const simple)
- (const transparent) (const hollow)
- (const full) (const user))
+ (const none) (const semi-up)
+ (const semi-down) (const simple)
+ (const transparent) (const hollow)
+ (const full) (const semi-up-hollow)
+ (const semi-down-hollow) (const semi-up-full)
+ (const semi-down-full) (const user))
:group 'ebnf-shape)
`ebnf-terminal-regexp', `ebnf-case-fold-search',
`ebnf-lex-comment-char' and `ebnf-lex-eop-char'.
+ `abnf' ebnf2ps recognizes the syntax described in the URL:
+ `http://www.faqs.org/rfcs/rfc2234.html'
+ (\"Augmented BNF for Syntax Specifications: ABNF\").
+
`iso-ebnf' ebnf2ps recognizes the syntax described in the URL:
`http://www.cl.cam.ac.uk/~mgk25/iso-ebnf.html'
(\"International Standard of the ISO EBNF Notation\").
Any other value is treated as `ebnf'."
:type '(radio :tag "Syntax"
- (const ebnf) (const iso-ebnf) (const yacc))
+ (const ebnf) (const abnf) (const iso-ebnf) (const yacc))
:group 'ebnf-syntactic)
:group 'ebnf-syntactic)
+(defcustom ebnf-file-suffix-regexp "\.[Bb][Nn][Ff]$"
+ "*Specify file name suffix that contains EBNF.
+
+See `ebnf-eps-directory' command."
+ :type 'regexp
+ :group 'ebnf2ps)
+
+
(defcustom ebnf-eps-prefix "ebnf--"
"*Specify EPS prefix file name.
:group 'ebnf2ps)
+(defcustom ebnf-stop-on-error nil
+ "*Non-nil means signal error and stop. Nil means signal error and continue."
+ :type 'boolean
+ :group 'ebnf2ps)
+
+
(defcustom ebnf-yac-ignore-error-recovery nil
"*Non-nil means ignore error recovery.
;; User commands
+;;;###autoload
+(defun ebnf-print-directory (&optional directory)
+ "Generate and print a PostScript syntactic chart image of DIRECTORY.
+
+If DIRECTORY is nil, it's used `default-directory'.
+
+The files in DIRECTORY that matches `ebnf-file-suffix-regexp' (which see) are
+processed.
+
+See also `ebnf-print-buffer'."
+ (interactive
+ (list (read-file-name "Directory containing EBNF files (print): "
+ nil default-directory)))
+ (ebnf-directory 'ebnf-print-buffer directory))
+
+
+;;;###autoload
+(defun ebnf-print-file (file &optional do-not-kill-buffer-when-done)
+ "Generate and print a PostScript syntactic chart image of the file FILE.
+
+If optional arg DO-NOT-KILL-BUFFER-WHEN-DONE is non-nil, the buffer isn't
+killed after process termination.
+
+See also `ebnf-print-buffer'."
+ (interactive "fEBNF file to generate PostScript and print from: ")
+ (ebnf-file 'ebnf-print-buffer file do-not-kill-buffer-when-done))
+
+
;;;###autoload
(defun ebnf-print-buffer (&optional filename)
"Generate and print a PostScript syntactic chart image of the buffer.
(ps-do-despool filename)))
+;;;###autoload
+(defun ebnf-spool-directory (&optional directory)
+ "Generate and spool a PostScript syntactic chart image of DIRECTORY.
+
+If DIRECTORY is nil, it's used `default-directory'.
+
+The files in DIRECTORY that matches `ebnf-file-suffix-regexp' (which see) are
+processed.
+
+See also `ebnf-spool-buffer'."
+ (interactive
+ (list (read-file-name "Directory containing EBNF files (spool): "
+ nil default-directory)))
+ (ebnf-directory 'ebnf-spool-buffer directory))
+
+
+;;;###autoload
+(defun ebnf-spool-file (file &optional do-not-kill-buffer-when-done)
+ "Generate and spool a PostScript syntactic chart image of the file FILE.
+
+If optional arg DO-NOT-KILL-BUFFER-WHEN-DONE is non-nil, the buffer isn't
+killed after process termination.
+
+See also `ebnf-spool-buffer'."
+ (interactive "fEBNF file to generate PostScript and spool from: ")
+ (ebnf-file 'ebnf-spool-buffer file do-not-kill-buffer-when-done))
+
+
;;;###autoload
(defun ebnf-spool-buffer ()
"Generate and spool a PostScript syntactic chart image of the buffer.
(ebnf-generate-region from to 'ebnf-generate))
+;;;###autoload
+(defun ebnf-eps-directory (&optional directory)
+ "Generate EPS files from EBNF files in DIRECTORY.
+
+If DIRECTORY is nil, it's used `default-directory'.
+
+The files in DIRECTORY that matches `ebnf-file-suffix-regexp' (which see) are
+processed.
+
+See also `ebnf-eps-buffer'."
+ (interactive
+ (list (read-file-name "Directory containing EBNF files (EPS): "
+ nil default-directory)))
+ (ebnf-directory 'ebnf-eps-buffer directory))
+
+
+;;;###autoload
+(defun ebnf-eps-file (file &optional do-not-kill-buffer-when-done)
+ "Generate an EPS file from EBNF file FILE.
+
+If optional arg DO-NOT-KILL-BUFFER-WHEN-DONE is non-nil, the buffer isn't
+killed after EPS generation.
+
+See also `ebnf-eps-buffer'."
+ (interactive "fEBNF file to generate EPS file from: ")
+ (ebnf-file 'ebnf-eps-buffer file do-not-kill-buffer-when-done))
+
+
;;;###autoload
(defun ebnf-eps-buffer ()
"Generate a PostScript syntactic chart image of the buffer in a EPS file.
"
;;; ebnf2ps.el version %s
-\(setq ebnf-special-font %s
+\(setq ebnf-special-show-delimiter %S
+ ebnf-special-font %s
ebnf-special-shape %s
ebnf-special-shadow %S
ebnf-special-border-width %S
ebnf-non-terminal-shadow %S
ebnf-non-terminal-border-width %S
ebnf-non-terminal-border-color %S
+ ebnf-production-name-p %S
ebnf-sort-production %s
ebnf-production-font %s
ebnf-arrow-shape %s
ebnf-syntax %s
ebnf-iso-alternative-p %S
ebnf-iso-normalize-p %S
+ ebnf-file-suffix-regexp %S
ebnf-eps-prefix %S
ebnf-entry-percentage %S
ebnf-color-p %S
ebnf-line-color %S
ebnf-debug-ps %S
ebnf-use-float-format %S
+ ebnf-stop-on-error %S
ebnf-yac-ignore-error-recovery %S
ebnf-ignore-empty-rule %S
ebnf-optimize %S)
;;; ebnf2ps.el - end of settings
"
ebnf-version
+ ebnf-special-show-delimiter
(ps-print-quote ebnf-special-font)
(ps-print-quote ebnf-special-shape)
ebnf-special-shadow
ebnf-non-terminal-shadow
ebnf-non-terminal-border-width
ebnf-non-terminal-border-color
+ ebnf-production-name-p
(ps-print-quote ebnf-sort-production)
(ps-print-quote ebnf-production-font)
(ps-print-quote ebnf-arrow-shape)
(ps-print-quote ebnf-syntax)
ebnf-iso-alternative-p
ebnf-iso-normalize-p
+ ebnf-file-suffix-regexp
ebnf-eps-prefix
ebnf-entry-percentage
ebnf-color-p
ebnf-line-color
ebnf-debug-ps
ebnf-use-float-format
+ ebnf-stop-on-error
ebnf-yac-ignore-error-recovery
ebnf-ignore-empty-rule
ebnf-optimize))
(defconst ebnf-style-custom-list
- '(ebnf-special-font
+ '(ebnf-special-show-delimiter
+ ebnf-special-font
ebnf-special-shape
ebnf-special-shadow
ebnf-special-border-width
ebnf-non-terminal-shadow
ebnf-non-terminal-border-width
ebnf-non-terminal-border-color
+ ebnf-production-name-p
ebnf-sort-production
ebnf-production-font
ebnf-arrow-shape
ebnf-syntax
ebnf-iso-alternative-p
ebnf-iso-normalize-p
+ ebnf-file-suffix-regexp
ebnf-eps-prefix
ebnf-entry-percentage
ebnf-color-p
ebnf-line-color
ebnf-debug-ps
ebnf-use-float-format
+ ebnf-stop-on-error
ebnf-yac-ignore-error-recovery
ebnf-ignore-empty-rule
ebnf-optimize)
'(;; EBNF default
(default
nil
+ (ebnf-special-show-delimiter . t)
(ebnf-special-font . '(7 Courier "Black" "Gray95" bold italic))
(ebnf-special-shape . 'bevel)
(ebnf-special-shadow . nil)
(ebnf-non-terminal-shadow . nil)
(ebnf-non-terminal-border-width . 1.0)
(ebnf-non-terminal-border-color . "Black")
+ (ebnf-production-name-p . t)
(ebnf-sort-production . nil)
(ebnf-production-font . '(10 Helvetica "Black" "White" bold))
(ebnf-arrow-shape . 'hollow)
(ebnf-syntax . 'ebnf)
(ebnf-iso-alternative-p . nil)
(ebnf-iso-normalize-p . nil)
+ (ebnf-file-suffix-regexp . "\.[Bb][Nn][Ff]$")
(ebnf-eps-prefix . "ebnf--")
(ebnf-entry-percentage . 0.5)
(ebnf-color-p . (or (fboundp 'x-color-values) ; Emacs
(ebnf-line-color . "Black")
(ebnf-debug-ps . nil)
(ebnf-use-float-format . t)
+ (ebnf-stop-on-error . nil)
(ebnf-yac-ignore-error-recovery . nil)
(ebnf-ignore-empty-rule . nil)
(ebnf-optimize . nil))
(ebnf-justify-sequence . 'left)
(ebnf-lex-comment-char . ?\#)
(ebnf-lex-eop-char . ?\;))
+ ;; ABNF default
+ (abnf
+ default
+ (ebnf-syntax . 'abnf))
;; ISO EBNF default
(iso-ebnf
default
Each element has the following form:
- (CUSTOM INHERITS (VAR . VALUE)...)
+ (NAME INHERITS (VAR . VALUE)...)
-CUSTOM is a symbol name style.
-INHERITS is a symbol name style from which the current style inherits the
-context. If INHERITS is nil, means that there is no inheritance.
-VAR is a valid ebnf2ps symbol custom variable. See `ebnf-style-custom-list'
-for valid symbol variable.
-VALUE is a sexp which it'll be evaluated to set the value to VAR. So, don't
-forget to quote symbols and constant lists. See `default' style for an
-example.
+Where:
-Don't handle this variable directly. Use functions `ebnf-insert-style' and
-`ebnf-merge-style'.")
+NAME is a symbol name style.
+
+INHERITS is a symbol name style from which the current style inherits
+ the context. If INHERITS is nil, means that there is no
+ inheritance.
+
+ This is a simple inheritance of style; so if you declare that a
+ style A inherits from a style B, all settings of B is applied
+ first and then the settings of A is applied. This is useful
+ when you wish to modify some aspects of an existing style, but
+ at same time wish to keep it unmodified.
+
+VAR is a valid ebnf2ps symbol custom variable.
+ See `ebnf-style-custom-list' for valid symbol variable.
+
+VALUE is a sexp which it'll be evaluated to set the value to VAR.
+ So, don't forget to quote symbols and constant lists.
+ See `default' style for an example.
+
+Don't handle this variable directly. Use functions `ebnf-insert-style',
+`ebnf-delete-style' and `ebnf-merge-style'.")
\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;###autoload
(defun ebnf-insert-style (name inherits &rest values)
- "Insert a new style NAME with inheritance INHERITS and values VALUES."
- (interactive)
+ "Insert a new style NAME with inheritance INHERITS and values VALUES.
+
+See `ebnf-style-database' documentation."
+ (interactive "SStyle name: \nSStyle inherits from: \nXStyle values: ")
(and (assoc name ebnf-style-database)
(error "Style name already exists: %s" name))
(or (assoc inherits ebnf-style-database)
ebnf-style-database)))
+;;;###autoload
+(defun ebnf-delete-style (name)
+ "Delete style NAME.
+
+See `ebnf-style-database' documentation."
+ (interactive "SDelete style name: ")
+ (or (assoc name ebnf-style-database)
+ (error "Style name doesn't exist: %s" name))
+ (let ((db ebnf-style-database))
+ (while db
+ (and (eq (nth 1 (car db)) name)
+ (error "Style name `%s' is inherited by `%s' style"
+ name (nth 0 (car db))))
+ (setq db (cdr db))))
+ (setq ebnf-style-database (assq-delete-all name ebnf-style-database)))
+
+
;;;###autoload
(defun ebnf-merge-style (name &rest values)
- "Merge values of style NAME with style VALUES."
- (interactive)
+ "Merge values of style NAME with style VALUES.
+
+See `ebnf-style-database' documentation."
+ (interactive "SStyle name: \nXStyle values: ")
(let ((style (or (assoc name ebnf-style-database)
(error "Style name does'nt exist: %s" name)))
(merge (ebnf-check-style-values values))
;;;###autoload
(defun ebnf-apply-style (style)
- "Set STYLE to current style.
+ "Set STYLE as the current style.
-It returns the old style symbol."
- (interactive)
+It returns the old style symbol.
+
+See `ebnf-style-database' documentation."
+ (interactive "SApply style: ")
(prog1
ebnf-current-style
(and (ebnf-apply-style1 style)
(defun ebnf-reset-style (&optional style)
"Reset current style.
-It returns the old style symbol."
- (interactive)
+It returns the old style symbol.
+
+See `ebnf-style-database' documentation."
+ (interactive "SReset style: ")
(setq ebnf-stack-style nil)
(ebnf-apply-style (or style 'default)))
;;;###autoload
(defun ebnf-push-style (&optional style)
- "Push the current style and set STYLE to current style.
+ "Push the current style and set STYLE as the current style.
-It returns the old style symbol."
- (interactive)
+It returns the old style symbol.
+
+See `ebnf-style-database' documentation."
+ (interactive "SPush style: ")
(prog1
ebnf-current-style
(setq ebnf-stack-style (cons ebnf-current-style ebnf-stack-style))
;;;###autoload
(defun ebnf-pop-style ()
- "Pop a style and set it to current style.
+ "Pop a style and set it as the current style.
+
+It returns the old style symbol.
-It returns the old style symbol."
+See `ebnf-style-database' documentation."
(interactive)
(prog1
(ebnf-apply-style (car ebnf-stack-style))
(defun ebnf-check-style-values (values)
(let (style)
(while values
- (and (memq (car values) ebnf-style-custom-list)
+ (and (memq (caar values) ebnf-style-custom-list)
(setq style (cons (car values) style)))
(setq values (cdr values)))
(nreverse style)))
(defconst ebnf-arrow-shape-alist
- '((none . 0)
- (semi-up . 1)
- (semi-down . 2)
- (simple . 3)
- (transparent . 4)
- (hollow . 5)
- (full . 6)
- (user . 7))
+ '((none . 0)
+ (semi-up . 1)
+ (semi-down . 2)
+ (simple . 3)
+ (transparent . 4)
+ (hollow . 5)
+ (full . 6)
+ (semi-up-hollow . 7)
+ (semi-up-full . 8)
+ (semi-down-hollow . 9)
+ (semi-down-full . 10)
+ (user . 11))
"Alist associating values for `ebnf-arrow-shape'.
See documentation for `ebnf-arrow-shape'.")
/ArrowPath{c newpath moveto Arrow closepath}bind def
+/UpPath
+{c newpath moveto
+ hT2 neg 0 rmoveto
+ 0 hT4 rlineto
+ hT2 hT4 neg rlineto
+ closepath
+}bind def
+
+/DownPath
+{c newpath moveto
+ hT2 neg 0 rmoveto
+ 0 hT4 neg rlineto
+ hT2 hT4 rlineto
+ closepath
+}bind def
+
%>Right Arrow: RA
% \\
% *---+
% /
/RA-vector
-[{} % 0 - none
- {hT2 neg hT4 rlineto} % 1 - semi-up
- {Down} % 2 - semi-down
- {Arrow} % 3 - simple
- {Gstroke ArrowPath} % 4 - transparent
- {Gstroke ArrowPath 1 FillGray} % 5 - hollow
- {Gstroke ArrowPath LineColor FillRGB} % 6 - full
- {Gstroke gsave UserArrow grestore} % 7 - user
+[{} % 0 - none
+ {hT2 neg hT4 rlineto} % 1 - semi-up
+ {Down} % 2 - semi-down
+ {Arrow} % 3 - simple
+ {Gstroke ArrowPath} % 4 - transparent
+ {Gstroke ArrowPath 1 FillGray} % 5 - hollow
+ {Gstroke ArrowPath LineColor FillRGB} % 6 - full
+ {Gstroke UpPath 1 FillGray} % 7 - semi-up-hollow
+ {Gstroke UpPath LineColor FillRGB} % 8 - semi-up-full
+ {Gstroke DownPath 1 FillGray} % 9 - semi-down-hollow
+ {Gstroke DownPath LineColor FillRGB} % 10 - semi-down-full
+ {Gstroke gsave UserArrow grestore} % 11 - user
]def
/RA
{xyp
neg yp add /yw exch def
xp add T sub /xw exch def
- /Effect EffectP def
- /fP F ForegroundP SetRGB BackgroundP aload pop true BG S
- /Effect 0 def
- ( :) S false BG
+ dup length 0 gt % empty string ==> no production name
+ {/Effect EffectP def
+ /fP F ForegroundP SetRGB BackgroundP aload pop true BG S
+ /Effect 0 def
+ ( :) S false BG}if
xw yw moveto
hT EL RA
xp yw moveto
(defun ebnf-generate-production (production)
(ebnf-message-info "Generating")
(run-hooks 'ebnf-production-hook)
- (ps-output-string (ebnf-node-name production))
+ (ps-output-string (if ebnf-production-name-p
+ (ebnf-node-name production)
+ ""))
(ps-output " "
(ebnf-format-float
(ebnf-node-width production)
- (+ ebnf-basic-height
+ (+ (if ebnf-production-name-p
+ ebnf-basic-height
+ 0.0)
(ebnf-node-entry (ebnf-node-production production))))
" BOP\n")
(ebnf-node-generation (ebnf-node-production production))
;; Internal functions
+(defun ebnf-directory (fun &optional directory)
+ "Process files in DIRECTORY applying function FUN on each file.
+
+If DIRECTORY is nil, it's used `default-directory'.
+
+The files in DIRECTORY that matches `ebnf-file-suffix-regexp' (which see) are
+processed."
+ (let ((files (directory-files (or directory default-directory)
+ t ebnf-file-suffix-regexp)))
+ (while files
+ (set-buffer (find-file-noselect (car files)))
+ (funcall fun)
+ (setq buffer-backed-up t) ; Do not back it up.
+ (save-buffer) ; Just save new version.
+ (kill-buffer (current-buffer))
+ (setq files (cdr files)))))
+
+
+(defun ebnf-file (fun file &optional do-not-kill-buffer-when-done)
+ "Process file FILE applying function FUN.
+
+If optional arg DO-NOT-KILL-BUFFER-WHEN-DONE is non-nil, the buffer isn't
+killed after process termination."
+ (set-buffer (find-file-noselect file))
+ (funcall fun)
+ (or do-not-kill-buffer-when-done
+ (kill-buffer (current-buffer))))
+
+
;; function `ebnf-range-regexp' is used to avoid a bug of `skip-chars-forward'
;; on version 20.4.1, that is, it doesn't accept ranges like "\240-\377" (or
;; "\177-\237"), but it accepts the character sequence from \240 to \377 (or
(defun ebnf-generate-region (from to gen-func)
(run-hooks 'ebnf-hook)
(let ((ebnf-limit (max from to))
+ (error-msg "SYNTAX")
the-point)
(save-excursion
(save-restriction
(condition-case data
(let ((tree (ebnf-parse-and-sort (min from to))))
(when gen-func
- (funcall gen-func
- (ebnf-dimensions
- (ebnf-optimize
- (ebnf-eliminate-empty-rules tree))))))
+ (setq error-msg "EMPTY RULES"
+ tree (ebnf-eliminate-empty-rules tree))
+ (setq error-msg "OPTMIZE"
+ tree (ebnf-optimize tree))
+ (setq error-msg "DIMENSIONS"
+ tree (ebnf-dimensions tree))
+ (setq error-msg "GENERATION")
+ (funcall gen-func tree))
+ (setq error-msg nil)) ; here it's ok
;; handler
((quit error)
(ding)
- (setq the-point (max (1- (point)) (point-min)))
- (message (error-message-string data)))))))
+ (setq the-point (max (1- (point)) (point-min))
+ error-msg (concat error-msg ": "
+ (error-message-string data)
+ (if (string= error-msg "SYNTAX")
+ (format ". At %d in buffer \"%s\"."
+ the-point
+ (buffer-name))
+ (format ". In buffer \"%s\"."
+ (buffer-name))))))))))
(cond
- (the-point
- (goto-char the-point))
+ ;; error occurred
+ (error-msg
+ (goto-char the-point)
+ (if ebnf-stop-on-error
+ (error error-msg)
+ (message error-msg)))
+ ;; generated output OK
(gen-func
nil)
+ ;; syntax checked OK
(t
(message "EBNF syntactic analysis: NO ERRORS.")))))
(ebnf-font-select font 'line-height))
+(defconst ebnf-syntax-alist
+ ;; 0.syntax 1.parser 2.initializer
+ '((iso-ebnf ebnf-iso-parser ebnf-iso-initialize)
+ (yacc ebnf-yac-parser ebnf-yac-initialize)
+ (abnf ebnf-abn-parser ebnf-abn-initialize)
+ (ebnf ebnf-bnf-parser ebnf-bnf-initialize))
+ "Alist associating ebnf syntax with a parser and a initializer.")
+
+
(defun ebnf-begin-job ()
(ps-printing-region nil nil nil)
(if ebnf-use-float-format
ebnf-message-float "%s"))
(ebnf-otz-initialize)
;; to avoid compilation gripes when calling autoloaded functions
- (funcall (cond ((eq ebnf-syntax 'iso-ebnf)
- (setq ebnf-parser-func 'ebnf-iso-parser)
- 'ebnf-iso-initialize)
- ((eq ebnf-syntax 'yacc)
- (setq ebnf-parser-func 'ebnf-yac-parser)
- 'ebnf-yac-initialize)
- (t
- (setq ebnf-parser-func 'ebnf-bnf-parser)
- 'ebnf-bnf-initialize)))
+ (let ((init (or (assoc ebnf-syntax ebnf-syntax-alist)
+ (assoc 'ebnf ebnf-syntax-alist))))
+ (setq ebnf-parser-func (nth 1 init))
+ (funcall (nth 2 init)))
(and ebnf-terminal-regexp ; ensures that it's a string or nil
(not (stringp ebnf-terminal-regexp))
(setq ebnf-terminal-regexp nil))
(ebnf-message-info "Calculating dimensions")
(ebnf-node-dimension-func (ebnf-node-production production))
(let* ((prod (ebnf-node-production production))
- (height (+ ebnf-font-height-P
+ (height (+ (if ebnf-production-name-p
+ ebnf-font-height-P
+ 0.0)
+ ebnf-line-width ebnf-line-width
ebnf-basic-height
(ebnf-node-height prod))))
(ebnf-node-entry production height)
(ebnf-node-height production height)
(ebnf-node-width production (+ (ebnf-node-width prod)
+ ebnf-line-width
ebnf-horizontal-space))))
;; [one-or-more width-fun dim-fun entry height width element separator]
;; [zero-or-more width-fun dim-fun entry height width element separator]
-(defun ebnf-list-width (or-more width)
+(defun ebnf-element-width (or-more width)
(setq width (- width ebnf-horizontal-space))
(ebnf-node-list or-more
(ebnf-justify-list or-more
;; right justify terms
((eq ebnf-justify-sequence 'right)
(ebnf-justify node seq seq-width width nil))
- ;; centralize terms
+ ;; centralize terms -- element
+ ((vectorp seq)
+ (ebnf-adjust-width seq width))
+ ;; centralize terms -- list
(t
(let ((the-width (/ (- width seq-width) (length seq)))
(lis seq))
0.0
0.0
(let ((len (length name)))
- (cond ((> len 2) name)
- ((= len 2) (concat " " name))
- ((= len 1) (concat " " name " "))
- (t " ")))
+ (cond ((> len 3) name)
+ ((= len 3) (concat name " "))
+ ((= len 2) (concat " " name " "))
+ ((= len 1) (concat " " name " "))
+ (t " ")))
ebnf-default-p))
(defun ebnf-make-or-more1 (gen-func dim-func list-part sep-part)
(vector gen-func
- 'ebnf-list-width
+ 'ebnf-element-width
dim-func
0.0
0.0
exception))
-(defun ebnf-make-repeat (times primary)
+(defun ebnf-make-repeat (times primary &optional upper)
(vector 'ebnf-generate-repeat
'ignore
'ebnf-repeat-dimension
0.0
0.0
0.0
- (concat times " *")
+ (cond ((and times upper) ; L * U, L * L
+ (if (string= times upper)
+ (if (string= times "")
+ " * "
+ times)
+ (concat times " * " upper)))
+ (times ; L *
+ (concat times " *"))
+ (upper ; * U
+ (concat "* " upper))
+ (t ; *
+ " * "))
primary))
)))))
-(defun ebnf-token-repeat (times repeat)
+(defun ebnf-token-repeat (times repeat &optional upper)
(if (null (cdr repeat))
;; n * EMPTY ==> EMPTY
repeat
;; n * term
(cons (car repeat)
- (ebnf-make-repeat times (cdr repeat)))))
+ (ebnf-make-repeat times (cdr repeat) upper))))
(defun ebnf-token-optional (body)
;; To make this file smaller, some commands go in a separate file.
;; But autoload them here to make the separation invisible.
+(autoload 'ebnf-abn-parser "ebnf-abn"
+ "ABNF parser.")
+
+(autoload 'ebnf-abn-initialize "ebnf-abn"
+ "Initialize ABNF token table.")
+
(autoload 'ebnf-bnf-parser "ebnf-bnf"
"EBNF parser.")
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