-;;; scheme.el --- Scheme mode, and its idiosyncratic commands.
+;;; scheme.el --- Scheme (and DSSSL) editing mode.
-;; Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc.
+;; Copyright (C) 1986, 87, 88, 1997 Free Software Foundation, Inc.
;; Author: Bill Rozas <jinz@prep.ai.mit.edu>
;; Keywords: languages, lisp
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
+;; Originally adapted from Lisp mode by Bill Rozas, jinx@prep with a
+;; comment that the code should be merged back. Merging done by
+;; d.love@dl.ac.uk when DSSSL features added.
+
;;; Commentary:
-;; Adapted from Lisp mode by Bill Rozas, jinx@prep.
-;; Initially a query replace of Lisp mode, except for the indentation
-;; of special forms. Probably the code should be merged at some point
-;; so that there is sharing between both libraries.
+;; The major mode for editing Scheme-type Lisp code, very similar to
+;; the Lisp mode documented in the Emacs manual. `dsssl-mode' is a
+;; variant of scheme-mode for editing DSSSL specifications for SGML
+;; documents. [As of Apr 1997, some pointers for DSSSL may be found,
+;; for instance, at <URL:http://www.sil.org/sgml/related.html#dsssl>.]
+;; All these Lisp-ish modes vary basically in details of the language
+;; syntax they highlight/indent/index, but dsssl-mode uses "^;;;" as
+;; the page-delimiter since ^L isn't normally a legal SGML character.
+;;
+;; For interacting with a Scheme interpreter See also `run-scheme' in
+;; the `cmuscheme' package and also the implementation-specific
+;; `xscheme' package.
;;; Code:
\f
+(require 'lisp-mode)
+
(defvar scheme-mode-syntax-table nil "")
(if (not scheme-mode-syntax-table)
(let ((i 0))
;; These characters are delimiters but otherwise undefined.
;; Brackets and braces balance for editing convenience.
- (modify-syntax-entry ?[ "(] ")
- (modify-syntax-entry ?] ")[ ")
+ (modify-syntax-entry ?\[ "(] ")
+ (modify-syntax-entry ?\] ")[ ")
(modify-syntax-entry ?{ "(} ")
(modify-syntax-entry ?} "){ ")
(modify-syntax-entry ?\| " 23")
(defvar scheme-mode-abbrev-table nil "")
(define-abbrev-table 'scheme-mode-abbrev-table ())
+(defvar scheme-imenu-generic-expression
+ '((nil
+ "^(define\\(\\|-\\(generic\\(\\|-procedure\\)\\|method\\)\\)*\\s-+(?\\(\\(\\sw\\|\\s_\\)+\\)" 4)
+ (" Types"
+ "^(define-class\\s-+(?\\(\\(\\sw\\|\\s_\\)+\\)" 1)
+ (" Macros"
+ "^(\\(defmacro\\|define-macro\\|define-syntax\\)\\s-+(?\\(\\(\\sw\\|\\s_\\)+\\)" 2))
+ "Imenu generic expression for Scheme mode. See `imenu-generic-expression'.")
+
(defun scheme-mode-variables ()
(set-syntax-table scheme-mode-syntax-table)
(setq local-abbrev-table scheme-mode-abbrev-table)
(setq paragraph-separate paragraph-start)
(make-local-variable 'paragraph-ignore-fill-prefix)
(setq paragraph-ignore-fill-prefix t)
+ (make-local-variable 'fill-paragraph-function)
+ (setq fill-paragraph-function 'lisp-fill-paragraph)
+ ;; Adaptive fill mode gets in the way of auto-fill,
+ ;; and should make no difference for explicit fill
+ ;; because lisp-fill-paragraph should do the job.
+ (make-local-variable 'adaptive-fill-mode)
+ (setq adaptive-fill-mode nil)
(make-local-variable 'indent-line-function)
- (setq indent-line-function 'scheme-indent-line)
+ (setq indent-line-function 'lisp-indent-line)
(make-local-variable 'parse-sexp-ignore-comments)
(setq parse-sexp-ignore-comments t)
+ (make-local-variable 'outline-regexp)
+ (setq outline-regexp ";;; \\|(....")
(make-local-variable 'comment-start)
(setq comment-start ";")
(make-local-variable 'comment-start-skip)
(make-local-variable 'comment-column)
(setq comment-column 40)
(make-local-variable 'comment-indent-function)
- (setq comment-indent-function 'scheme-comment-indent)
+ (setq comment-indent-function 'lisp-comment-indent)
(make-local-variable 'parse-sexp-ignore-comments)
(setq parse-sexp-ignore-comments t)
- (setq mode-line-process '("" scheme-mode-line-process)))
+ (make-local-variable 'lisp-indent-function)
+ (set lisp-indent-function 'scheme-indent-function)
+ (setq mode-line-process '("" scheme-mode-line-process))
+ (make-local-variable 'imenu-generic-expression)
+ (setq imenu-generic-expression scheme-imenu-generic-expression))
(defvar scheme-mode-line-process "")
+(defvar scheme-mode-map nil
+ "Keymap for Scheme mode.
+All commands in `shared-lisp-mode-map' are inherited by this map.")
+
+(if scheme-mode-map
+ ()
+ (let ((map (make-sparse-keymap "Scheme")))
+ (setq scheme-mode-map
+ (nconc (make-sparse-keymap) shared-lisp-mode-map))
+ (define-key scheme-mode-map "\e\t" 'lisp-complete-symbol)
+ (define-key scheme-mode-map [menu-bar] (make-sparse-keymap))
+ (define-key scheme-mode-map [menu-bar scheme]
+ (cons "Scheme" map))
+ (define-key map [run-scheme] '("Run Inferior Scheme" . run-scheme))
+ (define-key map [comment-region] '("Comment Out Region" . comment-region))
+ (define-key map [indent-region] '("Indent Region" . indent-region))
+ (define-key map [indent-line] '("Indent Line" . lisp-indent-line))
+ (put 'comment-region 'menu-enable 'mark-active)
+ (put 'indent-region 'menu-enable 'mark-active)))
+
+;; Used by cmuscheme
(defun scheme-mode-commands (map)
(define-key map "\t" 'scheme-indent-line)
(define-key map "\177" 'backward-delete-char-untabify)
(define-key map "\e\C-q" 'scheme-indent-sexp))
-
-(defvar scheme-mode-map nil)
-(if (not scheme-mode-map)
- (progn
- (setq scheme-mode-map (make-sparse-keymap))
- (scheme-mode-commands scheme-mode-map)))
\f
;;;###autoload
(defun scheme-mode ()
(defvar scheme-mit-dialect t
"If non-nil, scheme mode is specialized for MIT Scheme.
Set this to nil if you normally use another dialect.")
+
+(defvar dsssl-sgml-declaration
+ "<!DOCTYPE style-sheet PUBLIC \"-//James Clark//DTD DSSSL Style Sheet//EN\">
+"
+ "*An SGML declaration (typically using James Clark's style-sheet
+doctype, as required for Jade) which will be inserted into an empty
+buffer in dsssl-mode.")
+
+(defvar dsssl-imenu-generic-expression
+ ;; Perhaps this should also look for the style-sheet DTD tags. I'm
+ ;; not sure it's the best way to organize it; perhaps one type
+ ;; should be at the first level, though you don't see this anyhow if
+ ;; it gets split up.
+ '((" Defines"
+ "^(define\\s-+(?\\(\\(\\sw\\|\\s_\\)+\\)" 1)
+ (" Modes"
+ "^\\s-*(mode\\s-+\\(\\(\\sw\\|\\s-\\|\\s_\\)+\\)" 1)
+ (" Elements"
+ ;; (element foo ...) or (element (foo bar ...) ...)
+ "^\\s-*(element\\s-+(?\\(\\(\\sw\\|\\s-\\|\\s_\\)+\\))?" 1)
+ (" Declarations"
+ "^(declare\\(-\\sw+\\)+\\>\\s-+\\(\\(\\sw\\|\\s_\\)+\\)" 2))
+ "Imenu generic expression for DSSSL mode. See `imenu-generic-expression'.")
+
+;;;###autoload
+(defun dsssl-mode ()
+ "Major mode for editing DSSSL code.
+Editing commands are similar to those of lisp-mode.
+
+Commands:
+Delete converts tabs to spaces as it moves back.
+Blank lines separate paragraphs. Semicolons start comments.
+\\{scheme-mode-map}
+Entry to this mode calls the value of dsssl-mode-hook
+if that value is non-nil."
+ (interactive)
+ (kill-all-local-variables)
+ (use-local-map scheme-mode-map)
+ (scheme-mode-initialize)
+ (make-local-variable 'font-lock-defaults)
+ (setq font-lock-defaults '(dsssl-font-lock-keywords
+ nil t (("+-*/.<>=!?$%_&~^:" . "w"))
+ beginning-of-defun
+ (font-lock-comment-start-regexp . ";")
+ (font-lock-mark-block-function . mark-defun)))
+ (make-local-variable 'page-delimiter)
+ (setq page-delimiter "^;;;" ; ^L not valid SGML char
+ major-mode 'dsssl-mode
+ mode-name "DSSSL")
+ ;; Insert a suitable SGML declaration into an empty buffer.
+ (and (zerop (buffer-size))
+ dsssl-sgml-declaration
+ (not buffer-read-only)
+ (insert dsssl-sgml-declaration))
+ (run-hooks 'scheme-mode-hook)
+ (run-hooks 'dsssl-mode-hook)
+ (scheme-mode-variables)
+ (setq imenu-generic-expression dsssl-imenu-generic-expression))
+
+;; Extra syntax for DSSSL. This isn't separated from Scheme, but
+;; shouldn't cause much trouble in scheme-mode.
+(put 'element 'scheme-indent-function 1)
+(put 'mode 'scheme-indent-function 1)
+(put 'with-mode 'scheme-indent-function 1)
+
+(defvar dsssl-font-lock-keywords
+ '(("(\\(define\\(-\\w+\\)?\\)\\>[ ]*\\\((?\\)\\(\\sw+\\)\\>"
+ (1 font-lock-keyword-face)
+ (4 font-lock-function-name-face))
+ ("(\\(case\\|cond\\|else\\|if\\|lambda\\|let\\*?\\|letrec\\|and\\|or\\|map\\|with-mode\\)\\>" . 1)
+ ("(\\(element\\|mode\\|declare-\\w+\\)\\>[ ]*\\(\\sw+\\)"
+ (1 font-lock-keyword-face)
+ (2 font-lock-type-face))
+ ("(\\(element\\)\\>[ ]*(\\(\\S)+\\))"
+ (1 font-lock-keyword-face)
+ (2 font-lock-type-face))
+ ("\\<\\sw+:\\>" . font-lock-reference-face)
+ ("<\\([!?][-a-z0-9]+\\)" 1 font-lock-keyword-face)
+ ("<\\(/?[-a-z0-9]+\\)" 1 font-lock-function-name-face))
+ "Default expressions to highlight in DSSSL mode.")
+
\f
-(defun scheme-comment-indent (&optional pos)
- (save-excursion
- (if pos (goto-char pos))
- (cond ((looking-at ";;;") (current-column))
- ((looking-at ";;")
- (let ((tem (calculate-scheme-indent)))
- (if (listp tem) (car tem) tem)))
- (t
- (skip-chars-backward " \t")
- (max (if (bolp) 0 (1+ (current-column)))
- comment-column)))))
-
-(defvar scheme-indent-offset nil "")
-(defvar scheme-indent-function 'scheme-indent-function "")
-
-(defun scheme-indent-line (&optional whole-exp)
- "Indent current line as Scheme code.
-With argument, indent any additional lines of the same expression
-rigidly along with this one."
- (interactive "P")
- (let ((indent (calculate-scheme-indent)) shift-amt beg end
- (pos (- (point-max) (point))))
- (beginning-of-line)
- (setq beg (point))
- (skip-chars-forward " \t")
- (if (looking-at "[ \t]*;;;")
- ;; Don't alter indentation of a ;;; comment line.
- nil
- (if (listp indent) (setq indent (car indent)))
- (setq shift-amt (- indent (current-column)))
- (if (zerop shift-amt)
- nil
- (delete-region beg (point))
- (indent-to indent))
- ;; If initial point was within line's indentation,
- ;; position after the indentation. Else stay at same point in text.
- (if (> (- (point-max) pos) (point))
- (goto-char (- (point-max) pos)))
- ;; If desired, shift remaining lines of expression the same amount.
- (and whole-exp (not (zerop shift-amt))
- (save-excursion
- (goto-char beg)
- (forward-sexp 1)
- (setq end (point))
- (goto-char beg)
- (forward-line 1)
- (setq beg (point))
- (> end beg))
- (indent-code-rigidly beg end shift-amt)))))
-\f
-(defun calculate-scheme-indent (&optional parse-start)
- "Return appropriate indentation for current line as scheme code.
-In usual case returns an integer: the column to indent to.
-Can instead return a list, whose car is the column to indent to.
-This means that following lines at the same level of indentation
-should not necessarily be indented the same way.
-The second element of the list is the buffer position
-of the start of the containing expression."
- (save-excursion
- (beginning-of-line)
- (let ((indent-point (point)) state paren-depth desired-indent (retry t)
- last-sexp containing-sexp first-sexp-list-p)
- (if parse-start
- (goto-char parse-start)
- (beginning-of-defun))
- ;; Find outermost containing sexp
- (while (< (point) indent-point)
- (setq state (parse-partial-sexp (point) indent-point 0)))
- ;; Find innermost containing sexp
- (while (and retry (setq paren-depth (car state)) (> paren-depth 0))
- (setq retry nil)
- (setq last-sexp (nth 2 state))
- (setq containing-sexp (car (cdr state)))
- ;; Position following last unclosed open.
- (goto-char (1+ containing-sexp))
- ;; Is there a complete sexp since then?
- (if (and last-sexp (> last-sexp (point)))
- ;; Yes, but is there a containing sexp after that?
- (let ((peek (parse-partial-sexp last-sexp indent-point 0)))
- (if (setq retry (car (cdr peek))) (setq state peek))))
- (if (not retry)
- ;; Innermost containing sexp found
- (progn
- (goto-char (1+ containing-sexp))
- (if (not last-sexp)
- ;; indent-point immediately follows open paren.
- ;; Don't call hook.
- (setq desired-indent (current-column))
- ;; Move to first sexp after containing open paren
- (parse-partial-sexp (point) last-sexp 0 t)
- (setq first-sexp-list-p (looking-at "\\s("))
- (cond
- ((> (save-excursion (forward-line 1) (point))
- last-sexp)
- ;; Last sexp is on same line as containing sexp.
- ;; It's almost certainly a function call.
- (parse-partial-sexp (point) last-sexp 0 t)
- (if (/= (point) last-sexp)
- ;; Indent beneath first argument or, if only one sexp
- ;; on line, indent beneath that.
- (progn (forward-sexp 1)
- (parse-partial-sexp (point) last-sexp 0 t)))
- (backward-prefix-chars))
- (t
- ;; Indent beneath first sexp on same line as last-sexp.
- ;; Again, it's almost certainly a function call.
- (goto-char last-sexp)
- (beginning-of-line)
- (parse-partial-sexp (point) last-sexp 0 t)
- (backward-prefix-chars)))))))
- ;; If looking at a list, don't call hook.
- (if first-sexp-list-p
- (setq desired-indent (current-column)))
- ;; Point is at the point to indent under unless we are inside a string.
- ;; Call indentation hook except when overridden by scheme-indent-offset
- ;; or if the desired indentation has already been computed.
- (cond ((car (nthcdr 3 state))
- ;; Inside a string, don't change indentation.
- (goto-char indent-point)
- (skip-chars-forward " \t")
- (setq desired-indent (current-column)))
- ((and (integerp scheme-indent-offset) containing-sexp)
- ;; Indent by constant offset
- (goto-char containing-sexp)
- (setq desired-indent (+ scheme-indent-offset (current-column))))
- ((not (or desired-indent
- (and (boundp 'scheme-indent-function)
- scheme-indent-function
- (not retry)
- (setq desired-indent
- (funcall scheme-indent-function
- indent-point state)))))
- ;; Use default indentation if not computed yet
- (setq desired-indent (current-column))))
- desired-indent)))
-\f
+(defvar calculate-lisp-indent-last-sexp)
+
+;; Copied from lisp-indent-function, but with gets of
+;; scheme-indent-{function,hook}.
(defun scheme-indent-function (indent-point state)
(let ((normal-indent (current-column)))
- (save-excursion
- (goto-char (1+ (car (cdr state))))
- (re-search-forward "\\sw\\|\\s_")
- (if (/= (point) (car (cdr state)))
- (let ((function (buffer-substring (progn (forward-char -1) (point))
- (progn (forward-sexp 1) (point))))
- method)
- ;; Who cares about this, really?
- ;(if (not (string-match "\\\\\\||" function)))
- (setq function (downcase function))
- (setq method (get (intern-soft function) 'scheme-indent-function))
- (cond ((integerp method)
- (scheme-indent-specform method state indent-point))
- (method
- (funcall method state indent-point))
- ((and (> (length function) 3)
- (string-equal (substring function 0 3) "def"))
- (scheme-indent-defform state indent-point))))))))
-
-(defvar scheme-body-indent 2 "")
-\f
-(defun scheme-indent-specform (count state indent-point)
- (let ((containing-form-start (car (cdr state))) (i count)
- body-indent containing-form-column)
- ;; Move to the start of containing form, calculate indentation
- ;; to use for non-distinguished forms (> count), and move past the
- ;; function symbol. scheme-indent-function guarantees that there is at
- ;; least one word or symbol character following open paren of containing
- ;; form.
- (goto-char containing-form-start)
- (setq containing-form-column (current-column))
- (setq body-indent (+ scheme-body-indent containing-form-column))
- (forward-char 1)
- (forward-sexp 1)
- ;; Now find the start of the last form.
- (parse-partial-sexp (point) indent-point 1 t)
- (while (and (< (point) indent-point)
- (condition-case nil
- (progn
- (setq count (1- count))
- (forward-sexp 1)
- (parse-partial-sexp (point) indent-point 1 t))
- (error nil))))
- ;; Point is sitting on first character of last (or count) sexp.
- (cond ((> count 0)
- ;; A distinguished form. Use double scheme-body-indent.
- (list (+ containing-form-column (* 2 scheme-body-indent))
- containing-form-start))
- ;; A non-distinguished form. Use body-indent if there are no
- ;; distinguished forms and this is the first undistinguished
- ;; form, or if this is the first undistinguished form and
- ;; the preceding distinguished form has indentation at least
- ;; as great as body-indent.
- ((and (= count 0)
- (or (= i 0)
- (<= body-indent normal-indent)))
- body-indent)
- (t
- normal-indent))))
-
-(defun scheme-indent-defform (state indent-point)
- (goto-char (car (cdr state)))
- (forward-line 1)
- (if (> (point) (car (cdr (cdr state))))
- (progn
- (goto-char (car (cdr state)))
- (+ scheme-body-indent (current-column)))))
+ (goto-char (1+ (elt state 1)))
+ (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
+ (if (and (elt state 2)
+ (not (looking-at "\\sw\\|\\s_")))
+ ;; car of form doesn't seem to be a a symbol
+ (progn
+ (if (not (> (save-excursion (forward-line 1) (point))
+ calculate-lisp-indent-last-sexp))
+ (progn (goto-char calculate-lisp-indent-last-sexp)
+ (beginning-of-line)
+ (parse-partial-sexp (point)
+ calculate-lisp-indent-last-sexp 0 t)))
+ ;; Indent under the list or under the first sexp on the same
+ ;; line as calculate-lisp-indent-last-sexp. Note that first
+ ;; thing on that line has to be complete sexp since we are
+ ;; inside the innermost containing sexp.
+ (backward-prefix-chars)
+ (current-column))
+ (let ((function (buffer-substring (point)
+ (progn (forward-sexp 1) (point))))
+ method)
+ (setq method (or (get (intern-soft function) 'scheme-indent-function)
+ (get (intern-soft function) 'scheme-indent-hook)))
+ (cond ((or (eq method 'defun)
+ (and (null method)
+ (> (length function) 3)
+ (string-match "\\`def" function)))
+ (lisp-indent-defform state indent-point))
+ ((integerp method)
+ (lisp-indent-specform method state
+ indent-point normal-indent))
+ (method
+ (funcall method state indent-point)))))))
+
\f
;;; Let is different in Scheme
(defun scheme-let-indent (state indent-point)
(skip-chars-forward " \t")
(if (looking-at "[-a-zA-Z0-9+*/?!@$%^&_:~]")
- (scheme-indent-specform 2 state indent-point)
- (scheme-indent-specform 1 state indent-point)))
+ (lisp-indent-specform 2 state indent-point (current-column))
+ (lisp-indent-specform 1 state indent-point (current-column))))
;; (put 'begin 'scheme-indent-function 0), say, causes begin to be indented
;; like defun if the first form is placed on the next line, otherwise
(put 'unassigned\?-components 'scheme-indent-function 1)
(put 'unbound\?-components 'scheme-indent-function 1)
(put 'variable-components 'scheme-indent-function 1)))
-\f
-(defun scheme-indent-sexp ()
- "Indent each line of the list starting just after point."
- (interactive)
- (let ((indent-stack (list nil)) (next-depth 0) bol
- outer-loop-done inner-loop-done state this-indent)
- (save-excursion (forward-sexp 1))
- (save-excursion
- (setq outer-loop-done nil)
- (while (not outer-loop-done)
- (setq last-depth next-depth
- innerloop-done nil)
- (while (and (not innerloop-done)
- (not (setq outer-loop-done (eobp))))
- (setq state (parse-partial-sexp (point) (progn (end-of-line) (point))
- nil nil state))
- (setq next-depth (car state))
- (if (car (nthcdr 4 state))
- (progn (indent-for-comment)
- (end-of-line)
- (setcar (nthcdr 4 state) nil)))
- (if (car (nthcdr 3 state))
- (progn
- (forward-line 1)
- (setcar (nthcdr 5 state) nil))
- (setq innerloop-done t)))
- (if (setq outer-loop-done (<= next-depth 0))
- nil
- (while (> last-depth next-depth)
- (setq indent-stack (cdr indent-stack)
- last-depth (1- last-depth)))
- (while (< last-depth next-depth)
- (setq indent-stack (cons nil indent-stack)
- last-depth (1+ last-depth)))
- (forward-line 1)
- (setq bol (point))
- (skip-chars-forward " \t")
- (if (or (eobp) (looking-at "[;\n]"))
- nil
- (if (and (car indent-stack)
- (>= (car indent-stack) 0))
- (setq this-indent (car indent-stack))
- (let ((val (calculate-scheme-indent
- (if (car indent-stack) (- (car indent-stack))))))
- (if (integerp val)
- (setcar indent-stack
- (setq this-indent val))
- (if (cdr val)
- (setcar indent-stack (- (car (cdr val)))))
- (setq this-indent (car val)))))
- (if (/= (current-column) this-indent)
- (progn (delete-region bol (point))
- (indent-to this-indent)))))))))
(provide 'scheme)
projects / emacs.git / commitdiff