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Diffstat (limited to 'lisp/indent.el')
| -rw-r--r-- | lisp/indent.el | 467 |
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diff --git a/lisp/indent.el b/lisp/indent.el deleted file mode 100644 index c1e2fc2e132..00000000000 --- a/lisp/indent.el +++ /dev/null @@ -1,467 +0,0 @@ -;;; indent.el --- indentation commands for Emacs - -;; Copyright (C) 1985, 1995 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, Inc., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. - -;;; Commentary: - -;; Commands for making and changing indentation in text. These are -;; described in the Emacs manual. - -;;; Code: - -(defvar standard-indent 4 "\ -Default number of columns for margin-changing functions to indent.") - -(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 (&optional prefix-arg) - "Indent line in proper way for current major mode." - (interactive "P") - (if (eq indent-line-function 'indent-to-left-margin) - (insert-tab prefix-arg) - (if prefix-arg - (funcall indent-line-function prefix-arg) - (funcall indent-line-function)))) - -(defun insert-tab (&optional prefix-arg) - (let ((count (prefix-numeric-value prefix-arg))) - (if abbrev-mode - (expand-abbrev)) - (if indent-tabs-mode - (insert-char ?\t count) - (indent-to (* tab-width (+ count (/ (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)) - eol-flag) - (save-excursion - (skip-chars-forward " \t") - (setq eol-flag (eolp))) - (or eol-flag - (indent-to (max 0 (+ indent arg)) 0)) - (delete-region (point) (progn (skip-chars-forward " \t") (point)))) - (forward-line 1)) - (move-marker end nil))) - -(defun indent-line-to (column) - "Indent current line to COLUMN. -This function removes or adds spaces and tabs at beginning of line -only if necessary. It leaves point at end of indentation." - (back-to-indentation) - (let ((cur-col (current-column))) - (cond ((< cur-col column) - (if (> (- column (* (/ cur-col tab-width) tab-width)) tab-width) - (delete-region (point) - (progn (skip-chars-backward " ") (point)))) - (indent-to column)) - ((> cur-col column) ; too far right (after tab?) - (delete-region (progn (move-to-column column t) (point)) - (progn (back-to-indentation) (point))))))) - -(defun current-left-margin () - "Return the left margin to use for this line. -This is the value of the buffer-local variable `left-margin' plus the value -of the `left-margin' text-property at the start of the line." - (save-excursion - (back-to-indentation) - (max 0 - (+ left-margin (or (get-text-property - (if (and (eobp) (not (bobp))) - (1- (point)) (point)) - 'left-margin) 0))))) - -(defun move-to-left-margin (&optional n force) - "Move to the left margin of the current line. -With optional argument, move forward N-1 lines first. -The column moved to is the one given by the `current-left-margin' function. -If the line's indentation appears to be wrong, and this command is called -interactively or with optional argument FORCE, it will be fixed." - (interactive (list (prefix-numeric-value current-prefix-arg) t)) - (beginning-of-line n) - (skip-chars-forward " \t") - (let ((lm (current-left-margin)) - (cc (current-column))) - (cond ((> cc lm) - (if (> (move-to-column lm force) lm) - ;; If lm is in a tab and we are not forcing, move before tab - (backward-char 1))) - ((and force (< cc lm)) - (indent-to-left-margin))))) - -;; This is the default indent-line-function, -;; used in Fundamental Mode, Text Mode, etc. -(defun indent-to-left-margin () - "Indent current line to the column given by `current-left-margin'." - (indent-line-to (current-left-margin))) - -(defun delete-to-left-margin (&optional from to) - "Remove left margin indentation from a region. -This deletes to the column given by `current-left-margin'. -In no case will it delete non-whitespace. -Args FROM and TO are optional; default is the whole buffer." - (save-excursion - (goto-char (or to (point-max))) - (setq to (point-marker)) - (goto-char (or from (point-min))) - (or (bolp) (forward-line 1)) - (while (< (point) to) - (delete-region (point) (progn (move-to-left-margin nil t) (point))) - (forward-line 1)) - (move-marker to nil))) - -(defun set-left-margin (from to lm) - "Set the left margin of the region to WIDTH. -If `auto-fill-mode' is active, re-fill the region to fit the new margin." - (interactive "r\nNSet left margin to column: ") - (if (interactive-p) (setq lm (prefix-numeric-value lm))) - (save-excursion - ;; If inside indentation, start from BOL. - (goto-char from) - (skip-chars-backward " \t") - (if (bolp) (setq from (point))) - ;; Place end after whitespace - (goto-char to) - (skip-chars-forward " \t") - (setq to (point-marker))) - ;; Delete margin indentation first, but keep paragraph indentation. - (delete-to-left-margin from to) - (put-text-property from to 'left-margin lm) - (indent-rigidly from to lm) - (if auto-fill-function (save-excursion (fill-region from to nil t t))) - (move-marker to nil)) - -(defun set-right-margin (from to lm) - "Set the right margin of the region to WIDTH. -If `auto-fill-mode' is active, re-fill the region to fit the new margin." - (interactive "r\nNSet right margin to width: ") - (if (interactive-p) (setq lm (prefix-numeric-value lm))) - (save-excursion - (goto-char from) - (skip-chars-backward " \t") - (if (bolp) (setq from (point)))) - (put-text-property from to 'right-margin lm) - (if auto-fill-function (save-excursion (fill-region from to nil t t)))) - -(defun alter-text-property (from to prop func &optional object) - "Programmatically change value of a text-property. -For each region between FROM and TO that has a single value for PROPERTY, -apply FUNCTION to that value and sets the property to the function's result. -Optional fifth argument OBJECT specifies the string or buffer to operate on." - (let ((begin from) - end val) - (while (setq val (get-text-property begin prop object) - end (text-property-not-all begin to prop val object)) - (put-text-property begin end prop (funcall func val) object) - (setq begin end)) - (if (< begin to) - (put-text-property begin to prop (funcall func val) object)))) - -(defun increase-left-margin (from to inc) - "Increase or decrease the left-margin of the region. -With no prefix argument, this adds `standard-indent' of indentation. -A prefix arg (optional third arg INC noninteractively) specifies the amount -to change the margin by, in characters. -If `auto-fill-mode' is active, re-fill the region to fit the new margin." - (interactive "*r\nP") - (setq inc (if inc (prefix-numeric-value inc) standard-indent)) - (save-excursion - (goto-char from) - (skip-chars-backward " \t") - (if (bolp) (setq from (point))) - (goto-char to) - (setq to (point-marker))) - (alter-text-property from to 'left-margin - (lambda (v) (max (- left-margin) (+ inc (or v 0))))) - (indent-rigidly from to inc) - (if auto-fill-function (save-excursion (fill-region from to nil t t))) - (move-marker to nil)) - -(defun decrease-left-margin (from to inc) - "Make the left margin of the region smaller. -With no prefix argument, decrease the indentation by `standard-indent'. -A prefix arg (optional third arg INC noninteractively) specifies the amount -to change the margin by, in characters. -If `auto-fill-mode' is active, re-fill the region to fit the new margin." - (interactive "*r\nP") - (setq inc (if inc (prefix-numeric-value inc) standard-indent)) - (increase-left-margin from to (- inc))) - -(defun increase-right-margin (from to inc) - "Increase the right-margin of the region. -With no prefix argument, increase the right margin by `standard-indent'. -A prefix arg (optional third arg INC noninteractively) specifies the amount -to change the margin by, in characters. A negative argument decreases -the right margin width. -If `auto-fill-mode' is active, re-fill the region to fit the new margin." - (interactive "r\nP") - (if (interactive-p) - (setq inc (if inc (prefix-numeric-value current-prefix-arg) - standard-indent))) - (save-excursion - (alter-text-property from to 'right-margin - (lambda (v) (+ inc (or v 0)))) - (if auto-fill-function - (fill-region from to nil t t)))) - -(defun decrease-right-margin (from to inc) - "Make the right margin of the region smaller. -With no prefix argument, decrease the right margin by `standard-indent'. -A prefix arg (optional third arg INC noninteractively) specifies the amount -of width to remove, in characters. A negative argument increases -the right margin width. -If `auto-fill-mode' is active, re-fills region to fit in new margin." - (interactive "*r\nP") - (setq inc (if inc (prefix-numeric-value inc) standard-indent)) - (increase-right-margin from to (- inc))) - -(defun beginning-of-line-text (&optional n) - "Move to the beginning of the text on this line. -With optional argument, move forward N-1 lines first. -From the beginning of the line, moves past the left-margin indentation, the -fill-prefix, and any indentation used for centering or right-justifying the -line, but does not move past any whitespace that was explicitly inserted -\(such as a tab used to indent the first line of a paragraph)." - (interactive "p") - (beginning-of-line n) - (skip-chars-forward " \t") - ;; Skip over fill-prefix. - (if (and fill-prefix - (not (string-equal fill-prefix ""))) - (if (equal fill-prefix - (buffer-substring - (point) (min (point-max) (+ (length fill-prefix) (point))))) - (forward-char (length fill-prefix))) - (if (and adaptive-fill-mode adaptive-fill-regexp - (looking-at adaptive-fill-regexp)) - (goto-char (match-end 0)))) - ;; Skip centering or flushright indentation - (if (memq (current-justification) '(center right)) - (skip-chars-forward " \t"))) - -(defvar indent-region-function nil - "Short cut function 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'. -This should be a list of integers, ordered from smallest to largest.") - -(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-map>\\[edit-tab-stops-note-changes] 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) - (and abbrev-mode (= (char-syntax (preceding-char)) ?w) - (expand-abbrev)) - (let ((tabs tab-stop-list)) - (while (and tabs (>= (current-column) (car tabs))) - (setq tabs (cdr tabs))) - (if tabs - (let ((opoint (point))) - (skip-chars-backward " \t") - (delete-region (point) opoint) - (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 - (let ((before (point))) - (move-to-column (car tabs) t) - (save-excursion - (goto-char before) - ;; If we just added a tab, or moved over one, - ;; delete any superfluous spaces before the old point. - (if (and (eq (preceding-char) ?\ ) - (eq (following-char) ?\t)) - (let ((tabend (* (/ (current-column) tab-width) tab-width))) - (while (and (> (current-column) tabend) - (eq (preceding-char) ?\ )) - (forward-char -1)) - (delete-region (point) before)))))))) - -(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) - -;;; indent.el ends here |