;;; indent.el --- indentation commands for Emacs ;; Copyright (C) 1985, 1992, 1993 Free Software Foundation, Inc. ;; Maintainer: FSF ;; 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 2, 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. ;;; Commentary: ;; Commands for making and changing indentation in text. These are ;; described in the Emacs manual. ;;; Code: ;jwz: this is preloaded so don't ;;;###autoload (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) (setq zmacs-region-stays 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 region using indent-according-to-mode. A value of nil means really run indent-according-to-mode on each line.") (defun indent-region (start end column) "Indent each nonblank line in the region. With no argument, indent each line using `indent-according-to-mode', or use `indent-region-function' to do the whole region if that's non-nil. If there is a fill prefix, make each line start with the fill prefix. 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 column) (if fill-prefix (save-excursion (goto-char end) (setq end (point-marker)) (goto-char start) (let ((regexp (regexp-quote fill-prefix))) (while (< (point) end) (or (looking-at regexp) (and (bolp) (eolp)) (insert fill-prefix)) (forward-line 1)))) (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) (or (and (bolp) (eolp)) (funcall indent-line-function)) (forward-line 1)) (move-marker end nil)))) (setq column (prefix-numeric-value column)) (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 column 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 \\\\[edit-tab-stops-note-changes] to make changes take effect." (interactive) (setq edit-tab-stops-buffer (current-buffer)) (switch-to-buffer (get-buffer-create (gettext "*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 (gettext "\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 (gettext "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 ?\ )))) (defun move-to-tab-stop () "Move point 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) (let ((tabs tab-stop-list)) (while (and tabs (>= (current-column) (car tabs))) (setq tabs (cdr tabs))) (if tabs (move-to-column (car tabs) t)))) ;;; indent.el ends here