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- ;; Indentation commands for Emacs
- ;; Copyright (C) 1985 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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 1, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs 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.
-
-
- ;Now in loaddefs.el
- ;(defvar indent-line-function
- ; 'indent-to-left-margin
- ; "Function to indent current line.")
-
- (defun indent-according-to-mode ()
- "Indent line in proper way for current major mode."
- (interactive)
- (funcall indent-line-function))
-
- (defun indent-for-tab-command ()
- "Indent line in proper way for current major mode."
- (interactive)
- (if (eq indent-line-function 'indent-to-left-margin)
- (insert-tab)
- (funcall indent-line-function)))
-
- (defun insert-tab ()
- (if abbrev-mode
- (expand-abbrev))
- (if indent-tabs-mode
- (insert ?\t)
- (indent-to (* tab-width (1+ (/ (current-column) tab-width))))))
-
- (defun indent-rigidly (start end arg)
- "Indent all lines starting in the region sideways by ARG columns.
- Called from a program, takes three arguments, START, END and ARG."
- (interactive "r\np")
- (save-excursion
- (goto-char end)
- (setq end (point-marker))
- (goto-char start)
- (or (bolp) (forward-line 1))
- (while (< (point) end)
- (let ((indent (current-indentation)))
- (delete-region (point) (progn (skip-chars-forward " \t") (point)))
- (or (eolp)
- (indent-to (max 0 (+ indent arg)) 0)))
- (forward-line 1))
- (move-marker end nil)))
-
- ;; This is the default indent-line-function,
- ;; used in Fundamental Mode, Text Mode, etc.
- (defun indent-to-left-margin ()
- (or (= (current-indentation) left-margin)
- (let (epos)
- (save-excursion
- (beginning-of-line)
- (delete-region (point)
- (progn (skip-chars-forward " \t")
- (point)))
- (indent-to left-margin)
- (setq epos (point)))
- (if (< (point) epos)
- (goto-char epos)))))
-
- (defvar indent-region-function nil
- "Function which is short cut to indent each line in region with Tab.
- nil means really call Tab on each line.")
-
- (defun indent-region (start end arg)
- "Indent each nonblank line in the region.
- With no argument, indent each line with Tab.
- With argument COLUMN, indent each line to that column.
- Called from a program, takes three args: START, END and COLUMN."
- (interactive "r\nP")
- (if (null arg)
- (if indent-region-function
- (funcall indent-region-function start end)
- (save-excursion
- (goto-char end)
- (setq end (point-marker))
- (goto-char start)
- (or (bolp) (forward-line 1))
- (while (< (point) end)
- (funcall indent-line-function)
- (forward-line 1))
- (move-marker end nil)))
- (setq arg (prefix-numeric-value arg))
- (save-excursion
- (goto-char end)
- (setq end (point-marker))
- (goto-char start)
- (or (bolp) (forward-line 1))
- (while (< (point) end)
- (delete-region (point) (progn (skip-chars-forward " \t") (point)))
- (or (eolp)
- (indent-to arg 0))
- (forward-line 1))
- (move-marker end nil))))
-
- (defun indent-relative-maybe ()
- "Indent a new line like previous nonblank line."
- (interactive)
- (indent-relative t))
-
- (defun indent-relative (&optional unindented-ok)
- "Space out to under next indent point in previous nonblank line.
- An indent point is a non-whitespace character following whitespace.
- If the previous nonblank line has no indent points beyond
- the column point starts at, tab-to-tab-stop is done instead."
- (interactive "P")
- (if abbrev-mode (expand-abbrev))
- (let ((start-column (current-column))
- indent)
- (save-excursion
- (beginning-of-line)
- (if (re-search-backward "^[^\n]" nil t)
- (let ((end (save-excursion (forward-line 1) (point))))
- (move-to-column start-column)
- ;; Is start-column inside a tab on this line?
- (if (> (current-column) start-column)
- (backward-char 1))
- (or (looking-at "[ \t]")
- unindented-ok
- (skip-chars-forward "^ \t" end))
- (skip-chars-forward " \t" end)
- (or (= (point) end) (setq indent (current-column))))))
- (if indent
- (let ((opoint (point-marker)))
- (delete-region (point) (progn (skip-chars-backward " \t") (point)))
- (indent-to indent 0)
- (if (> opoint (point))
- (goto-char opoint))
- (move-marker opoint nil))
- (tab-to-tab-stop))))
-
- (defvar tab-stop-list
- '(8 16 24 32 40 48 56 64 72 80 88 96 104 112 120)
- "*List of tab stop positions used by tab-to-tab-stops.")
-
- (defvar edit-tab-stops-map nil "Keymap used in edit-tab-stops.")
- (if edit-tab-stops-map
- nil
- (setq edit-tab-stops-map (make-sparse-keymap))
- (define-key edit-tab-stops-map "\C-x\C-s" 'edit-tab-stops-note-changes)
- (define-key edit-tab-stops-map "\C-c\C-c" 'edit-tab-stops-note-changes))
-
- (defvar edit-tab-stops-buffer nil
- "Buffer whose tab stops are being edited--in case
- the variable tab-stop-list is local in that buffer.")
-
- (defun edit-tab-stops ()
- "Edit the tab stops used by tab-to-tab-stop.
- Creates a buffer *Tab Stops* containing text describing the tab stops.
- A colon indicates a column where there is a tab stop.
- You can add or remove colons and then do C-c C-c to make changes take effect."
- (interactive)
- (setq edit-tab-stops-buffer (current-buffer))
- (switch-to-buffer (get-buffer-create "*Tab Stops*"))
- (use-local-map edit-tab-stops-map)
- (make-local-variable 'indent-tabs-mode)
- (setq indent-tabs-mode nil)
- (overwrite-mode 1)
- (setq truncate-lines t)
- (erase-buffer)
- (let ((tabs tab-stop-list))
- (while tabs
- (indent-to (car tabs) 0)
- (insert ?:)
- (setq tabs (cdr tabs))))
- (let ((count 0))
- (insert ?\n)
- (while (< count 8)
- (insert (+ count ?0))
- (insert " ")
- (setq count (1+ count)))
- (insert ?\n)
- (while (> count 0)
- (insert "0123456789")
- (setq count (1- count))))
- (insert "\nTo install changes, type C-c C-c")
- (goto-char (point-min)))
-
- (defun edit-tab-stops-note-changes ()
- "Put edited tab stops into effect."
- (interactive)
- (let (tabs)
- (save-excursion
- (goto-char 1)
- (end-of-line)
- (while (search-backward ":" nil t)
- (setq tabs (cons (current-column) tabs))))
- (bury-buffer (prog1 (current-buffer)
- (switch-to-buffer edit-tab-stops-buffer)))
- (setq tab-stop-list tabs))
- (message "Tab stops installed"))
-
- (defun tab-to-tab-stop ()
- "Insert spaces or tabs to next defined tab-stop column.
- The variable tab-stop-list is a list of columns at which there are tab stops.
- Use \\[edit-tab-stops] to edit them interactively."
- (interactive)
- (if abbrev-mode (expand-abbrev))
- (let ((tabs tab-stop-list))
- (while (and tabs (>= (current-column) (car tabs)))
- (setq tabs (cdr tabs)))
- (if tabs
- (indent-to (car tabs))
- (insert ? ))))
-
- (define-key global-map "\t" 'indent-for-tab-command)
- (define-key esc-map "\034" 'indent-region)
- (define-key ctl-x-map "\t" 'indent-rigidly)
- (define-key esc-map "i" 'tab-to-tab-stop)
-