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Annotation of 43BSD/contrib/emacs/lisp/indent.el, revision 1.1

1.1     ! root        1: ;; Indentation commands for Emacs
        !             2: ;; Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: ;Now in loaddefs.el
        !            23: ;(defvar indent-line-function
        !            24: ;  'indent-to-left-margin
        !            25: ;  "Function to indent current line.")
        !            26: 
        !            27: (defun indent-according-to-mode ()
        !            28:   "Indent line in proper way for current major mode."
        !            29:   (interactive)
        !            30:   (funcall indent-line-function))
        !            31: 
        !            32: (defun indent-for-tab-command ()
        !            33:   "Indent line in proper way for current major mode."
        !            34:   (interactive)
        !            35:   (if (eq indent-line-function 'indent-to-left-margin)
        !            36:       (insert-tab)
        !            37:     (funcall indent-line-function)))
        !            38: 
        !            39: (defun insert-tab ()
        !            40:   (if abbrev-mode
        !            41:       (expand-abbrev))
        !            42:   (if indent-tabs-mode
        !            43:       (insert ?\t)
        !            44:     (indent-to (* tab-width (1+ (/ (current-column) tab-width))))))
        !            45: 
        !            46: (defun indent-rigidly (start end arg)
        !            47:   "Indent all lines starting in the region sideways by ARG columns.
        !            48: Called from a program, takes three arguments, START, END and ARG."
        !            49:   (interactive "r\np")
        !            50:   (save-excursion
        !            51:     (goto-char end)
        !            52:     (setq end (point-marker))
        !            53:     (goto-char start)
        !            54:     (or (bolp) (forward-line 1))
        !            55:     (while (< (point) end)
        !            56:       (let ((indent (current-indentation)))
        !            57:        (delete-region (point) (progn (skip-chars-forward " \t") (point)))
        !            58:        (or (eolp)
        !            59:            (indent-to (max 0 (+ indent arg)) 0)))
        !            60:       (forward-line 1))
        !            61:     (move-marker end nil)))
        !            62: 
        !            63: ;; This is the default indent-line-function,
        !            64: ;; used in Fundamental Mode, Text Mode, etc.
        !            65: (defun indent-to-left-margin ()
        !            66:   (or (= (current-indentation) left-margin)
        !            67:       (let (epos)
        !            68:        (save-excursion
        !            69:         (beginning-of-line)
        !            70:         (delete-region (point)
        !            71:                        (progn (skip-chars-forward " \t")
        !            72:                               (point)))
        !            73:         (indent-to left-margin)
        !            74:         (setq epos (point)))
        !            75:        (if (< (point) epos)
        !            76:            (goto-char epos)))))
        !            77: 
        !            78: (defvar indent-region-function nil
        !            79:   "Function which is short cut to indent each line in region with Tab.
        !            80: nil means really call Tab on each line.")
        !            81: 
        !            82: (defun indent-region (start end arg)
        !            83:   "Indent each nonblank line in the region.
        !            84: With no argument, indent each line with Tab.
        !            85: With argument COLUMN, indent each line to that column.
        !            86: Called from a program, takes three args: START, END and COLUMN."
        !            87:   (interactive "r\nP")
        !            88:   (if (null arg)
        !            89:       (if indent-region-function
        !            90:          (funcall indent-region-function start end)
        !            91:        (save-excursion
        !            92:         (goto-char end)
        !            93:         (setq end (point-marker))
        !            94:         (goto-char start)
        !            95:         (or (bolp) (forward-line 1))
        !            96:         (while (< (point) end)
        !            97:           (funcall indent-line-function)
        !            98:           (forward-line 1))
        !            99:         (move-marker end nil)))
        !           100:     (setq arg (prefix-numeric-value arg))
        !           101:   (save-excursion
        !           102:    (goto-char end)
        !           103:    (setq end (point-marker))
        !           104:    (goto-char start)
        !           105:    (or (bolp) (forward-line 1))
        !           106:    (while (< (point) end)
        !           107:      (delete-region (point) (progn (skip-chars-forward " \t") (point)))
        !           108:      (or (eolp)
        !           109:         (indent-to arg 0))
        !           110:      (forward-line 1))
        !           111:    (move-marker end nil))))
        !           112: 
        !           113: (defun indent-relative-maybe ()
        !           114:   "Indent a new line like previous nonblank line."
        !           115:   (interactive)
        !           116:   (indent-relative t))
        !           117: 
        !           118: (defun indent-relative (&optional unindented-ok)
        !           119:   "Space out to under next indent point in previous nonblank line.
        !           120: An indent point is a non-whitespace character following whitespace.
        !           121: If the previous nonblank line has no indent points beyond
        !           122: the column point starts at,  tab-to-tab-stop  is done instead."
        !           123:   (interactive "P")
        !           124:   (if abbrev-mode (expand-abbrev))
        !           125:   (let ((start-column (current-column))
        !           126:        indent)
        !           127:     (save-excursion
        !           128:       (beginning-of-line)
        !           129:       (if (re-search-backward "^[^\n]" nil t)
        !           130:          (let ((end (scan-buffer (point) 1 ?\n)))
        !           131:            (move-to-column start-column)
        !           132:            (or (looking-at "[ \t]")
        !           133:                unindented-ok
        !           134:                (skip-chars-forward "^ \t" end))
        !           135:            (skip-chars-forward " \t" end)
        !           136:            (or (= (point) end) (setq indent (current-column))))))
        !           137:     (if indent
        !           138:        (let ((opoint (point-marker)))
        !           139:          (delete-region (point) (progn (skip-chars-backward " \t") (point)))
        !           140:          (indent-to indent 0)
        !           141:          (if (> opoint (point))
        !           142:              (goto-char opoint))
        !           143:          (move-marker opoint nil))
        !           144:       (tab-to-tab-stop))))
        !           145: 
        !           146: (defvar tab-stop-list
        !           147:   '(8 16 24 32 40 48 56 64 72 80 88 96 104 112 120)
        !           148:   "List of tab stop positions used by tab-to-tab-stops.")
        !           149: 
        !           150: (defvar edit-tab-stops-map nil "Keymap used in edit-tab-stops.")
        !           151: (if edit-tab-stops-map
        !           152:     nil
        !           153:   (setq edit-tab-stops-map (make-sparse-keymap))
        !           154:   (define-key edit-tab-stops-map "\C-x\C-s" 'edit-tab-stops-note-changes)
        !           155:   (define-key edit-tab-stops-map "\C-c\C-c" 'edit-tab-stops-note-changes))
        !           156: 
        !           157: (defvar edit-tab-stops-buffer nil
        !           158:   "Buffer whose tab stops are being edited--in case
        !           159: the variable tab-stop-list is local in that buffer.")
        !           160: 
        !           161: (defun edit-tab-stops ()
        !           162:   "Edit the tab stops used by tab-to-tab-stop.
        !           163: Creates a buffer *Tab Stops* containing text describing the tab stops.
        !           164: A colon indicates a column where there is a tab stop.
        !           165: You can add or remove colons and then do C-x C-s to make changes take effect."
        !           166:   (interactive)
        !           167:   (setq edit-tab-stops-buffer (current-buffer))
        !           168:   (switch-to-buffer (get-buffer-create "*Tab Stops*"))
        !           169:   (use-local-map edit-tab-stops-map)
        !           170:   (make-local-variable 'indent-tabs-mode)
        !           171:   (setq indent-tabs-mode nil)
        !           172:   (overwrite-mode 1)
        !           173:   (setq truncate-lines t)
        !           174:   (erase-buffer)
        !           175:   (let ((tabs tab-stop-list))
        !           176:     (while tabs
        !           177:       (indent-to (car tabs) 0)
        !           178:       (insert ?:)
        !           179:       (setq tabs (cdr tabs))))
        !           180:   (let ((count 0))
        !           181:     (insert ?\n)
        !           182:     (while (< count 8)
        !           183:       (insert (+ count ?0))
        !           184:     (insert "         ")
        !           185:       (setq count (1+ count)))
        !           186:     (insert ?\n)
        !           187:     (while (> count 0)
        !           188:       (insert "0123456789")
        !           189:       (setq count (1- count))))
        !           190:   (insert "\nTo install changes, type C-x C-s")
        !           191:   (goto-char (point-min)))
        !           192: 
        !           193: (defun edit-tab-stops-note-changes ()
        !           194:   "Put edited tab stops into effect."
        !           195:   (interactive)
        !           196:     (let (tabs)
        !           197:       (save-excursion
        !           198:        (goto-char 1)
        !           199:        (end-of-line)
        !           200:        (while (search-backward ":" nil t)
        !           201:          (setq tabs (cons (current-column) tabs))))
        !           202:       (bury-buffer (prog1 (current-buffer)
        !           203:                          (switch-to-buffer edit-tab-stops-buffer)))
        !           204:       (setq tab-stop-list tabs))
        !           205:   (message "Tab stops installed"))
        !           206: 
        !           207: (defun tab-to-tab-stop ()
        !           208:   "Insert spaces or tabs to next defined tab-stop column.
        !           209: The variable tab-stop-list is a list of columns at which there are tab stops.
        !           210: Use \\[edit-tab-stops] to edit them interactively."
        !           211:   (interactive)
        !           212:   (if abbrev-mode (expand-abbrev))
        !           213:   (let ((tabs tab-stop-list))
        !           214:     (while (and tabs (>= (current-column) (car tabs)))
        !           215:       (setq tabs (cdr tabs)))
        !           216:     (if tabs
        !           217:        (indent-to (car tabs))
        !           218:       (insert ? ))))
        !           219: 
        !           220: (define-key global-map "\t" 'indent-for-tab-command)
        !           221: (define-key esc-map "\034" 'indent-region)
        !           222: (define-key ctl-x-map "\t" 'indent-rigidly)
        !           223: (define-key esc-map "i" 'tab-to-tab-stop)

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