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Annotation of GNUtools/emacs/lisp/lisp.el, revision 1.1

1.1     ! root        1: ;; Lisp editing commands for Emacs
        !             2: ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is free software; you can redistribute it and/or modify
        !             7: ;; it under the terms of the GNU General Public License as published by
        !             8: ;; the Free Software Foundation; either version 1, or (at your option)
        !             9: ;; any later version.
        !            10: 
        !            11: ;; GNU Emacs is distributed in the hope that it will be useful,
        !            12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: ;; GNU General Public License for more details.
        !            15: 
        !            16: ;; You should have received a copy of the GNU General Public License
        !            17: ;; along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            19: 
        !            20: 
        !            21: (defun forward-sexp (&optional arg)
        !            22:   "Move forward across one balanced expression.
        !            23: With argument, do this that many times."
        !            24:   (interactive "p")
        !            25:   (or arg (setq arg 1))
        !            26:   (goto-char (or (scan-sexps (point) arg) (buffer-end arg)))
        !            27:   (if (< arg 0) (backward-prefix-chars)))
        !            28: 
        !            29: (defun backward-sexp (&optional arg)
        !            30:   "Move backward across one balanced expression.
        !            31: With argument, do this that many times."
        !            32:   (interactive "p")
        !            33:   (or arg (setq arg 1))
        !            34:   (forward-sexp (- arg)))
        !            35: 
        !            36: (defun mark-sexp (arg)
        !            37:   "Set mark ARG sexps from point."
        !            38:   (interactive "p")
        !            39:   (push-mark
        !            40:     (save-excursion
        !            41:       (forward-sexp arg)
        !            42:       (point))))
        !            43: 
        !            44: (defun forward-list (&optional arg)
        !            45:   "Move forward across one balanced group of parentheses.
        !            46: With argument, do this that many times."
        !            47:   (interactive "p")
        !            48:   (or arg (setq arg 1))
        !            49:   (goto-char (or (scan-lists (point) arg 0) (buffer-end arg))))
        !            50: 
        !            51: (defun backward-list (&optional arg)
        !            52:   "Move backward across one balanced group of parentheses.
        !            53: With argument, do this that many times."
        !            54:   (interactive "p")
        !            55:   (or arg (setq arg 1))
        !            56:   (forward-list (- arg)))
        !            57: 
        !            58: (defun down-list (arg)
        !            59:   "Move forward down one level of parentheses.
        !            60: With argument, do this that many times.
        !            61: A negative argument means move backward but still go down a level."
        !            62:   (interactive "p")
        !            63:   (let ((inc (if (> arg 0) 1 -1)))
        !            64:     (while (/= arg 0)
        !            65:       (goto-char (or (scan-lists (point) inc -1) (buffer-end arg)))
        !            66:       (setq arg (- arg inc)))))
        !            67: 
        !            68: (defun backward-up-list (arg)
        !            69:   "Move backward out of one level of parentheses.
        !            70: With argument, do this that many times.
        !            71: A negative argument means move forward but still to a less deep spot."
        !            72:   (interactive "p")
        !            73:   (up-list (- arg)))
        !            74: 
        !            75: (defun up-list (arg) 
        !            76:   "Move forward out of one level of parentheses.
        !            77: With argument, do this that many times.
        !            78: A negative argument means move backward but still to a less deep spot."
        !            79:   (interactive "p")
        !            80:   (let ((inc (if (> arg 0) 1 -1)))
        !            81:     (while (/= arg 0)
        !            82:       (goto-char (or (scan-lists (point) inc 1) (buffer-end arg)))
        !            83:       (setq arg (- arg inc)))))
        !            84: 
        !            85: (defun kill-sexp (arg)
        !            86:   "Kill the syntactic expression following the cursor.
        !            87: With argument, kill that many expressions after (or before) the cursor."
        !            88:   (interactive "p")
        !            89:   (let ((opoint (point)))
        !            90:     (forward-sexp arg)
        !            91:     (kill-region opoint (point))))
        !            92: 
        !            93: (defun backward-kill-sexp (arg)
        !            94:   "Kill the syntactic expression preceding the cursor.
        !            95: With argument, kill that many expressions before (or after) the cursor."
        !            96:   (interactive "p")
        !            97:   (kill-sexp (- arg)))
        !            98: 
        !            99: (defun beginning-of-defun (&optional arg)
        !           100:   "Move backward to next beginning-of-defun.
        !           101: With argument, do this that many times.
        !           102: Returns t unless search stops due to end of buffer."
        !           103:   (interactive "p")
        !           104:   (and arg (< arg 0) (forward-char 1))
        !           105:   (and (re-search-backward "^\\s(" nil 'move (or arg 1))
        !           106:        (progn (beginning-of-line) t)))
        !           107: 
        !           108: (defun buffer-end (arg)
        !           109:   (if (> arg 0) (point-max) (point-min)))
        !           110: 
        !           111: (defun end-of-defun (&optional arg)
        !           112:   "Move forward to next end of defun.
        !           113: An end of a defun is found by moving forward from the beginning of one."
        !           114:   (interactive "p")
        !           115:   (if (or (null arg) (= arg 0)) (setq arg 1))
        !           116:   (let ((first t))
        !           117:     (while (and (> arg 0) (< (point) (point-max)))
        !           118:       (let ((pos (point)) npos)
        !           119:        (while (progn
        !           120:                (if (and first
        !           121:                         (progn
        !           122:                          (forward-char 1)
        !           123:                          (beginning-of-defun 1)))
        !           124:                    nil
        !           125:                  (or (bobp) (forward-char -1))
        !           126:                  (beginning-of-defun -1))
        !           127:                (setq first nil)
        !           128:                (forward-list 1)
        !           129:                (skip-chars-forward " \t")
        !           130:                (if (looking-at "[;\n]")
        !           131:                    (forward-line 1))
        !           132:                (<= (point) pos))))
        !           133:       (setq arg (1- arg)))
        !           134:     (while (< arg 0)
        !           135:       (let ((pos (point)))
        !           136:        (beginning-of-defun 1)
        !           137:        (forward-sexp 1)
        !           138:        (forward-line 1)
        !           139:        (if (>= (point) pos)
        !           140:            (if (beginning-of-defun 2)
        !           141:                (progn
        !           142:                  (forward-list 1)
        !           143:                  (skip-chars-forward " \t")
        !           144:                  (if (looking-at "[;\n]")
        !           145:                      (forward-line 1)))
        !           146:              (goto-char (point-min)))))
        !           147:       (setq arg (1+ arg)))))
        !           148: 
        !           149: (defun mark-defun ()
        !           150:   "Put mark at end of defun, point at beginning."
        !           151:   (interactive)
        !           152:   (push-mark (point))
        !           153:   (end-of-defun)
        !           154:   (push-mark (point))
        !           155:   (beginning-of-defun)
        !           156:   (re-search-backward "^\n" (- (point) 1) t))
        !           157: 
        !           158: (defun insert-parentheses (arg)
        !           159:   "Put parentheses around next ARG sexps.  Leave point after open-paren.
        !           160: No argument is equivalent to zero: just insert () and leave point between."
        !           161:   (interactive "P")
        !           162: ;Install these commented-out lines for version 19.
        !           163: ;  (if arg (skip-chars-forward " \t")
        !           164: ;    (or (memq (char-syntax (preceding-char)) '(?\  ?> ?\( ))
        !           165: ;      (insert " ")))
        !           166:   (insert ?\()
        !           167:   (save-excursion
        !           168:     (if arg
        !           169:        (forward-sexp (prefix-numeric-value arg)))
        !           170:     (insert ?\))
        !           171: ;    (or (memq (char-syntax (following-char)) '(?\  ?> ?\( ))
        !           172: ;      (insert " "))
        !           173:     ))
        !           174: 
        !           175: (defun move-past-close-and-reindent ()
        !           176:   "Move past next ), delete indentation before it, then indent after it."
        !           177:   (interactive)
        !           178:   (up-list 1)
        !           179:   (forward-char -1)
        !           180:   (while (save-excursion               ; this is my contribution
        !           181:           (let ((before-paren (point)))
        !           182:             (back-to-indentation)
        !           183:             (= (point) before-paren)))
        !           184:     (delete-indentation))
        !           185:   (forward-char 1)
        !           186:   (newline-and-indent))
        !           187: 
        !           188: (defun lisp-complete-symbol ()
        !           189:   "Perform completion on Lisp symbol preceding point.
        !           190: That symbol is compared against the symbols that exist
        !           191: and any additional characters determined by what is there
        !           192: are inserted.
        !           193: If the symbol starts just after an open-parenthesis,
        !           194: only symbols with function definitions are considered.
        !           195: Otherwise, all symbols with function definitions, values
        !           196: or properties are considered."
        !           197:   (interactive)
        !           198:   (let* ((end (point))
        !           199:         (buffer-syntax (syntax-table))
        !           200:         (beg (unwind-protect
        !           201:                  (save-excursion
        !           202:                    (set-syntax-table emacs-lisp-mode-syntax-table)
        !           203:                    (backward-sexp 1)
        !           204:                    (while (= (char-syntax (following-char)) ?\')
        !           205:                      (forward-char 1))
        !           206:                    (point))
        !           207:                (set-syntax-table buffer-syntax)))
        !           208:         (pattern (buffer-substring beg end))
        !           209:         (predicate
        !           210:          (if (eq (char-after (1- beg)) ?\()
        !           211:              'fboundp
        !           212:            (function (lambda (sym)
        !           213:                        (or (boundp sym) (fboundp sym)
        !           214:                            (symbol-plist sym))))))
        !           215:         (completion (try-completion pattern obarray predicate)))
        !           216:     (cond ((eq completion t))
        !           217:          ((null completion)
        !           218:           (message "Can't find completion for \"%s\"" pattern)
        !           219:           (ding))
        !           220:          ((not (string= pattern completion))
        !           221:           (delete-region beg end)
        !           222:           (insert completion))
        !           223:          (t
        !           224:           (message "Making completion list...")
        !           225:           (let ((list (all-completions pattern obarray predicate)))
        !           226:             (or (eq predicate 'fboundp)
        !           227:                 (let (new)
        !           228:                   (while list
        !           229:                     (setq new (cons (if (fboundp (intern (car list)))
        !           230:                                         (list (car list) " <f>")
        !           231:                                       (car list))
        !           232:                                     new))
        !           233:                     (setq list (cdr list)))
        !           234:                   (setq list (nreverse new))))
        !           235:             (with-output-to-temp-buffer " *Completions*"
        !           236:               (display-completion-list list)))
        !           237:           (message "Making completion list...%s" "done")))))

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