;;; essl-s.el --- Support for editing S source code ;; Copyright (C) 1989-1997 D. Bates, Kademan, Ritter, D.M. Smith, K. Hornik, ;; R.M. Heiberger, M. Maechler, and A.J. Rossini. ;; Copyright (C) 1998-2005 A.J. Rossini, Rich M. Heiberger, Martin ;; Maechler, Kurt Hornik, Rodney Sparapani, and Stephen Eglen. ;; Original Author: A.J. Rossini ;; Created: 26 Aug 1997 ;; 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 S source code (specializes to S, S+, R). ;;; Code: ; Requires and autoloads (ess-message "[essl-s:] (def** ) only ...") ; Configuration variables (defvar S-syntax-table nil "Syntax table for S 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) (modify-syntax-entry ?\" "\"" S-syntax-table) (modify-syntax-entry ?# "<" S-syntax-table) ; open comment (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$comp = 1 symbol(completion) (modify-syntax-entry ?@ "_" S-syntax-table); foo@slot = 1 symbol(completion) (modify-syntax-entry ?_ "." S-syntax-table) (modify-syntax-entry ?* "." S-syntax-table) (modify-syntax-entry ?< "." S-syntax-table) (modify-syntax-entry ?> "." S-syntax-table) (modify-syntax-entry ?/ "." S-syntax-table)) (defvar R-editing-alist '((paragraph-start . (concat "\\s-*$\\|" page-delimiter)) (paragraph-separate . (concat "\\s-*$\\|" page-delimiter)) (paragraph-ignore-fill-prefix . t) (require-final-newline . t) (comment-start . "#") (comment-add . 1) (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) ;; For Changelog add, require ' ' before <- : "attr<-" is a function name : (add-log-current-defun-header-regexp . "^\\(.+\\)\\s-+<-[ \t\n]*function") (font-lock-defaults . '(ess-R-mode-font-lock-keywords nil nil ((?\. . "w") (?\_ . "w")))) ) "General options for R source files.") (defvar S-editing-alist ;; copy the R-list and modify : (let ((S-alist (copy-alist R-editing-alist))) (setcdr (assoc 'font-lock-defaults S-alist) (quote '(ess-S-mode-font-lock-keywords nil nil ((?\. . "w"))))) ;; ^^ extra quote is needed - why? S-alist) "General options for editing S and S+ source files.") (defvar inferior-S-language-start '(concat "options(" "STERM='" ess-STERM "'" (if ess-editor (concat ", editor='" ess-editor "'")) (if ess-pager (concat ", pager='" ess-pager "', help.pager='" ess-pager "'")) ")") "S language expression for startup -- default for all S dialects.") (defconst S-common-cust-alist '((ess-language . "S") (inferior-ess-exit-command . "q()\n") (inferior-ess-language-start . (eval inferior-S-language-start)) ;;harmful for shell-mode's C-a: -- but "necessary" for ESS-help(?) : (comint-use-prompt-regexp-instead-of-fields . t) ;; emacs 21 and up ) "S-language common settings for all -customize-alist s" ) (defconst S+common-cust-alist (append '((ess-suffix . "S") (ess-mode-syntax-table . S-syntax-table) (ess-help-sec-regex . ess-help-S+-sec-regex) (ess-help-sec-keys-alist . ess-help-S+sec-keys-alist) (ess-change-sp-regexp . ess-S+-change-sp-regexp) (ess-cmd-delay . (if (featurep 'xemacs); needs much less delay (* 0.1 ess-S+-cmd-delay) ess-S+-cmd-delay)) (ess-function-pattern . ess-S-function-pattern) (ess-function-template . " <- \n#\nfunction()\n{\n\n}\n") (ess-dump-filename-template . (ess-replace-regexp-in-string "S$" ess-suffix ; in the one from custom: ess-dump-filename-template-proto)) (ess-mode-editing-alist . S-editing-alist) (ess-dumped-missing-re . "\\(\\(<-\\|=\\)\nDumped\n\\'\\)\\|\\(\\(<-\\|=\\)\\(\\s \\|\n\\)*\\'\\)") (ess-syntax-error-re . "\\(Syntax error: .*\\) at line \\([0-9]*\\), file \\(.*\\)$") (inferior-ess-objects-command . inferior-Splus-objects-command) (inferior-ess-font-lock-keywords . inferior-ess-S-font-lock-keywords) (inferior-ess-primary-prompt . "[a-zA-Z0-9() ]*> ?") (inferior-ess-secondary-prompt . "+ ?") (ess-editor . S-editor) (ess-pager . S-pager) ) S-common-cust-alist) "Common settings for all S+<*>-customize-alist s" ) ;;; Changes from S to S-PLUS 3.x. (standard S3 should be in essl-s!). (defconst ess-help-S+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. ;; S ver.3 (NOT S-Plus) (defconst ess-help-S3-sec-keys-alist '((?a . "ARGUMENTS:") (?b . "BACKGROUND:") (?B . "BUGS:") (?d . "DESCRIPTION:") (?D . "DETAILS:") (?e . "EXAMPLES:") (?n . "NOTE:") (?r . "REFERENCES:") (?s . "SEE ALSO:") (?S . "SIDE EFFECTS:") (?u . "USAGE:") (?v . "VALUE:")) "Help section keys for S ver.3.") ;; S ver.4 (NOT S-Plus) (defconst ess-help-S4-sec-keys-alist '((?a . "ARGUMENTS:") (?b . "BACKGROUND:") (?B . "BUGS:") (?d . "DESCRIPTION:") (?D . "DETAILS:") (?e . "EXAMPLES:") (?n . "NOTE:") (?r . "REFERENCES:") (?s . "SEE ALSO:") (?S . "SIDE EFFECTS:") (?u . "USAGE:") (?v . "VALUE:")) "Help section keys for S4.") ;; R (defconst ess-help-R-sec-keys-alist '((?a . "\\s *Arguments:") (?d . "\\s *Description:") (?D . "\\s *Details:") (?e . "\\s *Examples:") (?n . "\\s *Note:") (?r . "\\s *References:") (?s . "\\s *See Also:") (?u . "\\s *Usage:") (?v . "\\s *Value[s]?") ; ) "Alist of (key . string) pairs for use in help section searching.") (defconst ess-help-S+-sec-regex "^[A-Z. ---]+:$" "Reg(ular) Ex(pression) of section headers in help file.") (defconst ess-help-R-sec-regex "^[A-Z][a-z].+:$" "Reg(ular) Ex(pression) of section headers in help file.") ;;; S-mode extras of Martin Maechler, Statistik, ETH Zurich. ;;; See also ./ess-utils.el (defvar ess-function-outline-file (concat ess-etc-directory "/function-outline.S") "The file name of the ess-function outline that is to be inserted at point, when \\[ess-insert-function-outline] is used. Placeholders (substituted `at runtime'): $A$ for `Author', $D$ for `Date'.") ;; Use the user's own ~/S/emacs-fun.outline if (s)he has one : --- (let ((outline-file (concat (getenv "HOME") "/S/function-outline.S"))) (if (file-exists-p outline-file) (setq ess-function-outline-file outline-file))) ;; Seth's idea; see ess-toggle-S-assign-key below (defvar ess-S-assign-key [?\C-=] ;; = "\C-c=" ; old-default: "_" "This key is mapped to insert `ess-S-assign' (by default '<-'), when \\[ess-toggle-S-assign-key] is called.") (defvar ess-S-assign-key-last nil "This caches the previous value (binding) of `ess-S-assign-key'. It allows \\[ess-toggle-S-assign-key] to toggle back to the previous definition.") ; Function Definitions (defun S-comment-indent () "Indentation for S 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 S-indent-line () "Indent current line as S 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 S-calculate-indent (&optional parse-start) "Return appropriate indentation for current line as S 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)))))))))) (defun ess-insert-function-outline () "Insert an S function definition `outline' at point. Uses the file given by the variable `ess-function-outline-file'." (interactive) (let ((oldpos (point))) (save-excursion (insert-file-contents ess-function-outline-file) (if (search-forward "$A$" nil t) (replace-match (user-full-name) 'not-upcase 'literal)) (goto-char oldpos) (if (search-forward "$D$" nil t) (replace-match (ess-time-string 'clock) 'not-upcase 'literal))) (goto-char (1+ oldpos)))) ;;*;; S/R Pretty-Editing (defun ess-fix-comments (&optional dont-query verbose) "Fix ess-mode buffer so that single-line comments start with at least `##'." (interactive "P") (ess-replace-regexp-dump-to-src "^\\([ \t]*#\\)\\([^#]\\)" "\\1#\\2" dont-query verbose)) (defun ess-dump-to-src (&optional dont-query verbose) "Make the changes in an S - dump() file to improve human readability." (interactive "P") (ess-replace-regexp-dump-to-src "^\"\\([a-z.][a-z.0-9]*\\)\" *<-\n" "\n\\1 <- " dont-query verbose 'ensure-ess)) (defun ess-num-var-round (&optional dont-query verbose) "Is VERY useful for dump(.)'ed numeric variables; ROUND some of them by replacing endings of 000000*.. and 999999*. Martin Maechler" (interactive "P") (save-excursion (goto-char (point-min)) (let ((num 0) (str "") (rgxp "000000+[1-9]?[1-9]?\\>") (to "")) (if dont-query (ess-rep-regexp rgxp to nil nil verbose) (query-replace-regexp rgxp to nil)) (while (< num 9) (setq str (concat (int-to-string num) "999999+[0-8]*")) (if (and (numberp verbose) (> verbose 1)) (message (format "\nregexp: '%s'" str))) (goto-char (point-min)) (ess-rep-regexp str (int-to-string (1+ num)) 'fixedcase 'literal verbose) (setq num (1+ num)))))) (defun ess-fix-dot (before-chars &optional dont-query verbose) "Remove trailing decimal '.' (\"dot\"), before BEFORE; typically from S-plus" ;; typically, before-chars = "]:" or more (ess-replace-regexp-dump-to-src (concat "\\([0-9]\\)\\.\\( *[" before-chars "]\\)") ;; 111 ^ "\\1\\2" dont-query verbose)) (defun ess-fix-dot-1 (&optional do-query verbose) "Remove trailing decimal '.' (\"dot\"), before ':' or ']', i.e., in cases where it's ugly and nonsense. DO-QUERY(prefix) asks before replacing." (interactive "P") (ess-fix-dot "]:" (not do-query) verbose)) (defun ess-fix-dot-more (&optional dont-query verbose) "Remove trailing decimal '.' (\"dot\", typically from S+) in more cases than `ess-fix-dot-1'." (interactive "P") (ess-fix-dot-1 nil verbose) (ess-fix-dot ",)" dont-query verbose)) (defun ess-fix-EQ-assign (&optional dont-query verbose not-all) "Replace \"=\" by \"<-\" in places where it 'might make sense', e.g., for function assignments and lines not ending in \",\". Be *careful* for list()s of functions and when argument not-all is nil (as by default) !" ;;TODO: "in the few places we can be very sure.." ;;---- is hard in general: local functions: ok; but functions in ;; list(a = function(x) abs(x), b= function(y) bound(y)) *NOT* ok! (interactive "P") (ess-replace-regexp-dump-to-src "^\\( *[a-z.][_a-z.0-9]*\\) *= *\\(function *(\\)" "\\1 <- \\2" dont-query verbose) (unless not-all ;; "too" aggressive {proposing to replace function argument specs}: (ess-replace-regexp-dump-to-src ;; all those *not* ending in "," ;; including Mat[ i, ] = ..., ;; but not `names(x) = "..."' for that is "confused" with plot(x=x,..) "^\\( *[a-z.][][, \"_a-z.0-9]*\\) *= *\\([a-z.0-9({]\\(.*[^,]\\)? *$\\)" "\\1 <- \\2" nil ;; always query - often has many "false positives" verbose) )) ;;; All of the above three : (defun ess-MM-fix-src (&optional dont-query verbose) "Clean up ess-source code which has been produced by dump(..), and other code typically produced by other tools. Produces more readable code, and one that is well formatted in emacs ess-mode." (interactive "P") ;; each of the following does a save-excursion: (ess-dump-to-src dont-query) (ess-fix-comments dont-query) (ess-num-var-round dont-query verbose) (ess-fix-dot-more dont-query verbose) (ess-fix-EQ-assign dont-query verbose 'not-all) ) (defun ess-fix-miscellaneous (&optional from verbose) "Fix Miscellaneous S/R `ill-formation's from current \\[point]. Particularly use \"<-\"and put spaces around operators." (interactive "d\nP"); Defaults: point and prefix (C-u) (save-excursion (if (string= ess-dialect "R") (progn (require 'essd-r) (R-fix-T-F from (not verbose)))) ;; former C and matlab programmers leave trailing ";" : (goto-char from) (ess-rep-regexp "; *$" "" nil 'literal verbose) (goto-char from) (ess-rep-regexp ";\\( *\\)#" "\\1#" nil nil verbose) ;;from R 1.9.x "_" is valid in names; here assume no initial / trailing '_' (goto-char from) (ess-rep-regexp " +_ *" " <- " nil 'literal verbose) (goto-char from) (ess-rep-regexp "_ +" " <- " nil 'literal verbose) ;; ensure space around "<-" ---- but only replace if necessary: (goto-char from) (ess-rep-regexp "\\([^< \t\n]\\)\\(<" (not ">=") : (goto-char from);; --> " <", care with "->": (ess-rep-regexp "\\([^-< \t\n]\\)\\([<>]\\)" "\\1 \\2" nil nil verbose) ;; ">" -> "> " , for "<", don't split "<-" nor "<<-": (goto-char from) (ess-rep-regexp "\\(>=?\\)\\([^= \t\n]\\)" "\\1 \\2" nil nil verbose) (goto-char from) (ess-rep-regexp "\\(<=?\\)\\([^-<= \t\n]\\)" "\\1 \\2" nil nil t) ;; -- ensure space around "=", "==", "!=" : (goto-char from) ;; --> " =" (ess-rep-regexp "\\([^=!<> ]\\)\\([=!]?\\)=" "\\1 \\2=" nil nil verbose) (goto-char from) (ess-rep-regexp "=\\([^= ]\\)" "= \\1" nil nil verbose) (goto-char from) ;; add a space between "{" and surrounding ..char: (ess-rep-regexp "{\\([.A-Za-z()]\\)" "{ \\1" 'fix nil verbose) (ess-rep-regexp "\\([()]\\){" "\\1 {" 'fix nil verbose) (goto-char from) ;; add a space between "}" and a preceding wordchar: (ess-rep-regexp "\\([A-Za-z0-9()]\\)}" "\\1 }" 'fix nil verbose) (ess-space-around "else" from verbose) ;; add a newline and indent before a "}" ;; --- IFF there's NO "{" or "#" AND some NON-white text on the same line: ;;D (if verbose (message "\t R-fix-misc..: Hard.. '}'")) (goto-char from) (ess-rep-regexp "^\\([^#{\n]*[^#{ \t\n]+[ \t]*\\)}[ \t]*$" "\\1\n}" 'fix nil verbose) )) ;; This is by Seth Falcon, modeled after ess-toggle-underscore (see below). (defun ess-toggle-S-assign-key (force) "Possibly bind the key in `ess-S-assign-key' to inserting `ess-S-assign'. If `ess-S-assign-key' is \"_\", simply use \\[ess-toggle-underscore]. Otherwise, unless the prefix argument FORCE is set, toggle between the new and the previous assignment." (interactive "P") (require 'ess-mode) (require 'ess-inf) (let ((current-action (lookup-key ess-mode-map ess-S-assign-key)) (insert-S-assign #'(lambda() (interactive) (delete-horizontal-space) (insert ess-S-assign)))) (if (and (stringp ess-S-assign-key) (string= ess-S-assign-key "_")) (ess-toggle-underscore force) ;; else "do things here" (let* ((current-is-S-assign (eq current-action insert-S-assign)) (new-action (if force insert-S-assign ;; else "not force" (default): (if (or current-is-S-assign (eq ess-S-assign-key-last insert-S-assign)) ess-S-assign-key-last insert-S-assign)))) (message "[ess-toggle-S-assign-key:] current: '%s', new: '%s'" current-action new-action) (define-key ess-mode-map ess-S-assign-key new-action) (define-key inferior-ess-mode-map ess-S-assign-key new-action) (if (not (and force current-is-S-assign)) (setq ess-S-assign-key-last current-action)))))) (defun ess-smart-underscore () "Smart \"_\" key: insert `ess-S-assign', unless in string/comment. If the underscore key is pressed a second time, the assignment operator is removed and replaced by the underscore. `ess-S-assign', typically \" <- \", can be customized. In ESS modes other than R/S, an underscore is always inserted. " (interactive) ;;(insert (if (ess-inside-string-or-comment-p (point)) "_" ess-S-assign)) (if (or (ess-inside-string-or-comment-p (point)) (not (equal ess-language "S"))) (insert "_") ;; Else one keypress produces ess-S-assign; a second keypress will delete ;; ess-S-assign and instead insert _ ;; Rather than trying to count a second _ keypress, just check whether ;; the current point is preceded by ess-S-assign. (let ((assign-len (length ess-S-assign))) (if (and (>= (point) (+ assign-len (point-min))) ;check that we can move back (save-excursion (backward-char assign-len) (looking-at ess-S-assign))) ;; If we are currently looking at ess-S-assign, replace it with _ (progn (delete-backward-char assign-len) (insert "_")) (delete-horizontal-space) (insert ess-S-assign))))) (defun ess-toggle-underscore (force) "Set the \"_\" (underscore) key to \\[ess-smart-underscore] or back to \"_\". Toggle the current definition, unless FORCE is non-nil, where \\[ess-smart-underscore] is set unconditionally. Using \"C-q _\" will always just insert the underscore character." (interactive "P") (require 'ess-mode) (require 'ess-inf) (let ((current-key (lookup-key ess-mode-map "_"))) (if (and current-key ;; (stringp current-key) (string= current-key ess-S-assign) (not force)) (progn (define-key ess-mode-map "_" nil); 'self-insert-command (define-key inferior-ess-mode-map "_" nil)) ;; else : "force" or current-key is "nil", i.e. default (define-key ess-mode-map "_" 'ess-smart-underscore) (define-key inferior-ess-mode-map "_" 'ess-smart-underscore)))) ;; NOTA BENE: "_" is smart *by default* : ;; ----- The user can always customize `ess-S-assign' ... (ess-toggle-underscore 'force-to-S-assign) (defun ess-add-MM-keys () "Define MM's user keys, currently \\\\[ess-insert-function-outline], and \\\\[ess-execute-screen-options]." (interactive) (require 'ess-mode); typically unnecessary (require 'ess-inf); dito (define-key ess-mode-map "\C-cf" 'ess-insert-function-outline) (define-key inferior-ess-mode-map "\C-cw" 'ess-execute-screen-options) ) (defun ess-dump-args-and-go (Sfunc) ; &optional buff) "Dump the function name, with arguments, to a buffer for editing. Currently, this needs to: 1. set the buffer to the right mode, with the right settings 2. format the statement, 3. c/function/Sfunc/ and I need to relearn emacs lisp (but I had to, anyway." (interactive "sFunction ? ") (let* ((buffname "ess-complete.R") (buf (ess-execute (format "args(%s)" Sfunc) t buffname))) (pop-to-buffer buf) (message "here yet?") (while (search-forward "function" nil t) (replace-match Sfunc nil t)) (ess-setq-vars-local ess-customize-alist); (current-buffer)) (setq major-mode 'ess-mode) (use-local-map ess-mode-map) (set-syntax-table ess-mode-syntax-table) )) (add-hook 'ess-mode-hook (lambda () (set (make-local-variable 'fill-nobreak-predicate) 'ess-inside-string-p) (set (make-local-variable 'normal-auto-fill-function) 'ess-do-auto-fill))) (provide 'essl-s) ; 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-s.el ends here