;;; essl-omg.el --- Support for editing Omega source code ;; Copyright (C) 1999--2001 A.J. Rossini. ;; Copyright (C) 2002--2004 A.J. Rossini, Rich M. Heiberger, Martin ;; Maechler, Kurt Hornik, Rodney Sparapani, and Stephen Eglen. ;; Original Author: A.J. Rossini ;; Created: 15 Aug 1999 ;; Maintainers: ESS-core ;; This file is part of ESS (Emacs Speaks Statistics). ;; This file is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; This file is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs; see the file COPYING. If not, write to ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. ;;; Commentary: ;; Code for general editing Omega source code. This is initially ;; based upon the similarities between Omega and S, but will need to ;; diverge to incorporate the use of Java-style coding. ;;; Code: ; Requires and autoloads ; Specialized functions (defun OMG-comment-indent () "Indentation for Omega comments." (if (looking-at "////") (current-column) (if (looking-at "///") (let ((tem (S-calculate-indent))) (if (listp tem) (car tem) tem)) (skip-chars-backward " \t") (max (if (bolp) 0 (1+ (current-column))) comment-column)))) (defun OMG-indent-line () "Indent current line as Omega code. Return the amount the indentation changed by." (let ((indent (S-calculate-indent nil)) beg shift-amt (case-fold-search nil) (pos (- (point-max) (point)))) (beginning-of-line) (setq beg (point)) (cond ((eq indent nil) (setq indent (current-indentation))) (t (skip-chars-forward " \t") (if (and ess-fancy-comments (looking-at "////")) (setq indent 0)) (if (and ess-fancy-comments (looking-at "//") (not (looking-at "///"))) (setq indent comment-column) (if (eq indent t) (setq indent 0)) (if (listp indent) (setq indent (car indent))) (cond ((and (looking-at "else\\b") (not (looking-at "else\\s_"))) (setq indent (save-excursion (ess-backward-to-start-of-if) (+ ess-else-offset (current-indentation))))) ((= (following-char) ?}) (setq indent (+ indent (- ess-close-brace-offset ess-indent-level)))) ((= (following-char) ?{) (setq indent (+ indent ess-brace-offset))))))) (skip-chars-forward " \t") (setq shift-amt (- indent (current-column))) (if (zerop shift-amt) (if (> (- (point-max) pos) (point)) (goto-char (- (point-max) pos))) (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)))) shift-amt)) (defun OMG-calculate-indent (&optional parse-start) "Return appropriate indentation for current line as Omega code. In usual case returns an integer: the column to indent to. Returns nil if line starts inside a string, t if in a comment." (save-excursion (beginning-of-line) (let ((indent-point (point)) (case-fold-search nil) state containing-sexp) (if parse-start (goto-char parse-start) (beginning-of-defun)) (while (< (point) indent-point) (setq parse-start (point)) (setq state (parse-partial-sexp (point) indent-point 0)) (setq containing-sexp (car (cdr state)))) (cond ((or (nth 3 state) (nth 4 state)) ;; return nil or t if should not change this line (nth 4 state)) ((null containing-sexp) ;; Line is at top level. May be data or function definition, (beginning-of-line) (if (and (/= (following-char) ?\{) (save-excursion (ess-backward-to-noncomment (point-min)) (ess-continued-statement-p))) ess-continued-statement-offset 0)) ; Unless it starts a function body ((/= (char-after containing-sexp) ?{) ;; line is expression, not statement: ;; indent to just after the surrounding open. (goto-char containing-sexp) (let ((bol (save-excursion (beginning-of-line) (point)))) ;; modified by shiba@isac 7.3.1992 (cond ((and (numberp ess-expression-offset) (re-search-backward "[ \t]*expression[ \t]*" bol t)) ;; This regexp match every "expression". ;; modified by shiba ;;(forward-sexp -1) (beginning-of-line) (skip-chars-forward " \t") ;; End (+ (current-column) ess-expression-offset)) ((and (numberp ess-arg-function-offset) (re-search-backward "=[ \t]*\\s\"*\\(\\w\\|\\s_\\)+\\s\"*[ \t]*" bol t)) (forward-sexp -1) (+ (current-column) ess-arg-function-offset)) ;; "expression" is searched before "=". ;; End (t (progn (goto-char (1+ containing-sexp)) (current-column)))))) (t ;; Statement level. Is it a continuation or a new statement? ;; Find previous non-comment character. (goto-char indent-point) (ess-backward-to-noncomment containing-sexp) ;; Back up over label lines, since they don't ;; affect whether our line is a continuation. (while (eq (preceding-char) ?\,) (ess-backward-to-start-of-continued-exp containing-sexp) (beginning-of-line) (ess-backward-to-noncomment containing-sexp)) ;; Now we get the answer. (if (ess-continued-statement-p) ;; This line is continuation of preceding line's statement; ;; indent ess-continued-statement-offset more than the ;; previous line of the statement. (progn (ess-backward-to-start-of-continued-exp containing-sexp) (+ ess-continued-statement-offset (current-column) (if (save-excursion (goto-char indent-point) (skip-chars-forward " \t") (eq (following-char) ?{)) ess-continued-brace-offset 0))) ;; This line starts a new statement. ;; Position following last unclosed open. (goto-char containing-sexp) ;; Is line first statement after an open-brace? (or ;; If no, find that first statement and indent like it. (save-excursion (forward-char 1) (while (progn (skip-chars-forward " \t\n") (looking-at "//")) ;; Skip over comments following openbrace. (forward-line 1)) ;; The first following code counts ;; if it is before the line we want to indent. (and (< (point) indent-point) (current-column))) ;; If no previous statement, ;; indent it relative to line brace is on. ;; For open brace in column zero, don't let statement ;; start there too. If ess-indent-level is zero, ;; use ess-brace-offset + ess-continued-statement-offset instead. ;; For open-braces not the first thing in a line, ;; add in ess-brace-imaginary-offset. (+ (if (and (bolp) (zerop ess-indent-level)) (+ ess-brace-offset ess-continued-statement-offset) ess-indent-level) ;; Move back over whitespace before the openbrace. ;; If openbrace is not first nonwhite thing on the line, ;; add the ess-brace-imaginary-offset. (progn (skip-chars-backward " \t") (if (bolp) 0 ess-brace-imaginary-offset)) ;; If the openbrace is preceded by a parenthesized exp, ;; move to the beginning of that; ;; possibly a different line (progn (if (eq (preceding-char) ?\)) (forward-sexp -1)) ;; Get initial indentation of the line we are on. (current-indentation)))))))))) (defvar OMG-syntax-table nil "Syntax table for Omegahat code.") (if S-syntax-table nil (setq S-syntax-table (make-syntax-table)) (modify-syntax-entry ?\\ "\\" S-syntax-table) (modify-syntax-entry ?+ "." S-syntax-table) (modify-syntax-entry ?- "." S-syntax-table) (modify-syntax-entry ?= "." S-syntax-table) (modify-syntax-entry ?% "." S-syntax-table) (modify-syntax-entry ?< "." S-syntax-table) (modify-syntax-entry ?> "." S-syntax-table) (modify-syntax-entry ?& "." S-syntax-table) (modify-syntax-entry ?| "." S-syntax-table) (modify-syntax-entry ?\' "\"" S-syntax-table) ;;FIXME: This fails (warning in compilation): ;;F "//" are 2 characters; ?// is invalid ;;F NEXT LINE IS BOGUS IN XEMACS, AJR ;;F (modify-syntax-entry ?// "<" S-syntax-table) ; open comment ;;F (modify-syntax-entry ?\n ">" S-syntax-table) ; close comment ;;(modify-syntax-entry ?. "w" S-syntax-table) ; "." used in S obj names (modify-syntax-entry ?. "_" S-syntax-table) ; see above/below, ; plus consider separation. (modify-syntax-entry ?$ "_" S-syntax-table) ; foo.bar$hack is 1 symbol (modify-syntax-entry ?_ "." S-syntax-table) (modify-syntax-entry ?* "." S-syntax-table) (modify-syntax-entry ?< "." S-syntax-table) (modify-syntax-entry ?> "." S-syntax-table) (modify-syntax-entry ?/ "." S-syntax-table)) (defvar OMG-editing-alist '((paragraph-start . (concat "^$\\|" page-delimiter)) (paragraph-separate . (concat "^$\\|" page-delimiter)) (paragraph-ignore-fill-prefix . t) (require-final-newline . t) (comment-start . "//") (comment-start-skip . "//+ *") (comment-column . 40) ;;(comment-indent-function . 'S-comment-indent) ;;(ess-comment-indent . 'S-comment-indent) ;;(ess-indent-line . 'S-indent-line) ;;(ess-calculate-indent . 'S-calculate-indent) (indent-line-function . 'S-indent-line) (parse-sexp-ignore-comments . t) (ess-style . ess-default-style) (ess-local-process-name . nil) ;;(ess-keep-dump-files . 'ask) (ess-mode-syntax-table . S-syntax-table) (font-lock-defaults . '(ess-S-mode-font-lock-keywords nil nil ((?\. . "w"))))) "General options for Omegahat source files.") ;;; Changes from S to S-PLUS 3.x. (standard S3 should be in essl-s!). (defconst OMG-help-sec-keys-alist '((?a . "ARGUMENTS:") (?b . "BACKGROUND:") (?B . "BUGS:") (?d . "DESCRIPTION:") (?D . "DETAILS:") (?e . "EXAMPLES:") (?n . "NOTE:") (?O . "OPTIONAL ARGUMENTS:") (?R . "REQUIRED ARGUMENTS:") (?r . "REFERENCES:") (?s . "SEE ALSO:") (?S . "SIDE EFFECTS:") (?u . "USAGE:") (?v . "VALUE:")) "Alist of (key . string) pairs for use in section searching.") ;;; `key' indicates the keystroke to use to search for the section heading ;;; `string' in an S help file. `string' is used as part of a ;;; regexp-search, and so specials should be quoted. (defconst ess-help-OMG-sec-regex "^[A-Z. ---]+:$" "Reg(ular) Ex(pression) of section headers in help file") ;;; S-mode extras of Martin Maechler, Statistik, ETH Zurich. ;;>> Moved things into --> ./ess-utils.el (provide 'essl-omg) ; Local variables section ;;; This file is automatically placed in Outline minor mode. ;;; The file is structured as follows: ;;; Chapters: ^L ; ;;; Sections: ;;*;; ;;; Subsections: ;;;*;;; ;;; Components: defuns, defvars, defconsts ;;; Random code beginning with a ;;;;* comment ;;; Local variables: ;;; mode: emacs-lisp ;;; outline-minor-mode: nil ;;; mode: outline-minor ;;; outline-regexp: "\^L\\|\\`;\\|;;\\*\\|;;;\\*\\|(def[cvu]\\|(setq\\|;;;;\\*" ;;; End: ;;; essl-omg.el ends here