-;;; text-mode.el --- text mode, and its idiosyncratic commands.
-
-;; Copyright (C) 1985, 1992 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:
-
-;; This package provides the fundamental text mode documented in the
-;; Emacs user's manual.
-
-;;; Code:
-
-(defvar text-mode-syntax-table nil
- "Syntax table used while in text mode.")
-
-(defvar text-mode-abbrev-table nil
- "Abbrev table used while in text mode.")
-(define-abbrev-table 'text-mode-abbrev-table ())
-
-(if text-mode-syntax-table
- ()
- (setq text-mode-syntax-table (make-syntax-table))
- (modify-syntax-entry ?\" ". " text-mode-syntax-table)
- (modify-syntax-entry ?\\ ". " text-mode-syntax-table)
- (modify-syntax-entry ?' "w " text-mode-syntax-table))
-
-(defvar text-mode-map nil
- "Keymap for Text mode.
-Many other modes, such as Mail mode, Outline mode and Indented Text mode,
-inherit all the commands defined in this map.")
-
-(if text-mode-map
- ()
- (setq text-mode-map (make-sparse-keymap))
- (define-key text-mode-map "\e\t" 'ispell-complete-word)
- (define-key text-mode-map "\t" 'tab-to-tab-stop)
- (define-key text-mode-map "\es" 'center-line)
- (define-key text-mode-map "\eS" 'center-paragraph))
-
-\f
-;(defun non-saved-text-mode ()
-; "Like text-mode, but delete auto save file when file is saved for real."
-; (text-mode)
-; (make-local-variable 'delete-auto-save-files)
-; (setq delete-auto-save-files t))
-
-(defun text-mode ()
- "Major mode for editing text intended for humans to read.
-Special commands:
-\\{text-mode-map}
-Turning on Text mode calls the value of the variable `text-mode-hook',
-if that value is non-nil."
- (interactive)
- (kill-all-local-variables)
- (use-local-map text-mode-map)
- (setq mode-name "Text")
- (setq major-mode 'text-mode)
- (setq local-abbrev-table text-mode-abbrev-table)
- (set-syntax-table text-mode-syntax-table)
- (run-hooks 'text-mode-hook))
-
-(defvar indented-text-mode-map ()
- "Keymap for Indented Text mode.
-All the commands defined in Text mode are inherited unless overridden.")
-
-(if indented-text-mode-map
- ()
- ;; Make different definition for TAB before the one in text-mode-map, but
- ;; share the rest.
- (let ((newmap (make-sparse-keymap)))
- (define-key newmap "\t" 'indent-relative)
- (setq indented-text-mode-map (nconc newmap text-mode-map))))
-
-(defun indented-text-mode ()
- "Major mode for editing text with indented paragraphs.
-In this mode, paragraphs are delimited only by blank lines.
-You can thus get the benefit of adaptive filling
- (see the variable `adaptive-fill-mode').
-\\{indented-text-mode-map}
-Turning on `indented-text-mode' calls the value of the variable
-`text-mode-hook', if that value is non-nil."
- (interactive)
- (kill-all-local-variables)
- (use-local-map text-mode-map)
- (define-abbrev-table 'text-mode-abbrev-table ())
- (setq local-abbrev-table text-mode-abbrev-table)
- (set-syntax-table text-mode-syntax-table)
- (make-local-variable 'indent-line-function)
- (setq indent-line-function 'indent-relative-maybe)
- (make-local-variable 'paragraph-start)
- (setq paragraph-start (concat "^$\\|" page-delimiter))
- (make-local-variable 'paragraph-separate)
- (setq paragraph-separate paragraph-start)
- (use-local-map indented-text-mode-map)
- (setq mode-name "Indented Text")
- (setq major-mode 'indented-text-mode)
- (run-hooks 'text-mode-hook 'indented-text-mode-hook))
-
-(defun center-paragraph ()
- "Center each nonblank line in the paragraph at or after point.
-See `center-line' for more info."
- (interactive)
- (save-excursion
- (forward-paragraph)
- (or (bolp) (newline 1))
- (let ((end (point)))
- (backward-paragraph)
- (center-region (point) end))))
-
-(defun center-region (from to)
- "Center each nonblank line starting in the region.
-See `center-line' for more info."
- (interactive "r")
- (if (> from to)
- (let ((tem to))
- (setq to from from tem)))
- (save-excursion
- (save-restriction
- (narrow-to-region from to)
- (goto-char from)
- (while (not (eobp))
- (or (save-excursion (skip-chars-forward " \t") (eolp))
- (center-line))
- (forward-line 1)))))
-
-(defun center-line ()
- "Center the line point is on, within the width specified by `fill-column'.
-This means adjusting the indentation so that it equals
-the distance between the end of the text and `fill-column'."
- (interactive)
- (save-excursion
- (let (line-length)
- (beginning-of-line)
- (delete-horizontal-space)
- (end-of-line)
- (delete-horizontal-space)
- (setq line-length (current-column))
- (beginning-of-line)
- (indent-to
- (+ left-margin
- (/ (- fill-column left-margin line-length) 2))))))
-
-;;; text-mode.el ends here
+;;; text-mode.el --- text mode, and its idiosyncratic commands
+
+;; Copyright (C) 1985, 1992, 1994, 2002, 2003, 2004,
+;; 2005 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: wp
+
+;; 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This package provides the fundamental text mode documented in the
+;; Emacs user's manual.
+
+;;; Code:
+
+(defcustom text-mode-hook nil
+ "Normal hook run when entering Text mode and many related modes."
+ :type 'hook
+ :options '(turn-on-auto-fill flyspell-mode)
+ :group 'data)
+
+(defvar text-mode-variant nil
+ "Non-nil if this buffer's major mode is a variant of Text mode.
+Use (derived-mode-p 'text-mode) instead.")
+
+(defvar text-mode-syntax-table
+ (let ((st (make-syntax-table)))
+ (modify-syntax-entry ?\" ". " st)
+ (modify-syntax-entry ?\\ ". " st)
+ ;; We add `p' so that M-c on 'hello' leads to 'Hello' rather than 'hello'.
+ (modify-syntax-entry ?' "w p" st)
+ st)
+ "Syntax table used while in `text-mode'.")
+
+(defvar text-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "\e\t" 'ispell-complete-word)
+ (define-key map "\es" 'center-line)
+ (define-key map "\eS" 'center-paragraph)
+ map)
+ "Keymap for `text-mode'.
+Many other modes, such as `mail-mode', `outline-mode' and `indented-text-mode',
+inherit all the commands defined in this map.")
+
+\f
+(define-derived-mode text-mode nil "Text"
+ "Major mode for editing text written for humans to read.
+In this mode, paragraphs are delimited only by blank or white lines.
+You can thus get the full benefit of adaptive filling
+ (see the variable `adaptive-fill-mode').
+\\{text-mode-map}
+Turning on Text mode runs the normal hook `text-mode-hook'."
+ (make-local-variable 'text-mode-variant)
+ (setq text-mode-variant t)
+ (set (make-local-variable 'require-final-newline)
+ mode-require-final-newline)
+ (set (make-local-variable 'indent-line-function) 'indent-relative))
+
+(define-derived-mode paragraph-indent-text-mode text-mode "Parindent"
+ "Major mode for editing text, with leading spaces starting a paragraph.
+In this mode, you do not need blank lines between paragraphs
+when the first line of the following paragraph starts with whitespace.
+`paragraph-indent-minor-mode' provides a similar facility as a minor mode.
+Special commands:
+\\{text-mode-map}
+Turning on Paragraph-Indent Text mode runs the normal hooks
+`text-mode-hook' and `paragraph-indent-text-mode-hook'."
+ :abbrev-table nil :syntax-table nil
+ (paragraph-indent-minor-mode))
+
+(defun paragraph-indent-minor-mode ()
+ "Minor mode for editing text, with leading spaces starting a paragraph.
+In this mode, you do not need blank lines between paragraphs when the
+first line of the following paragraph starts with whitespace, as with
+`paragraph-indent-text-mode'.
+Turning on Paragraph-Indent minor mode runs the normal hook
+`paragraph-indent-text-mode-hook'."
+ (interactive)
+ (set (make-local-variable 'paragraph-start)
+ (concat "[ \t\n\f]\\|" paragraph-start))
+ (set (make-local-variable 'indent-line-function) 'indent-to-left-margin)
+ (run-hooks 'paragraph-indent-text-mode-hook))
+
+(defalias 'indented-text-mode 'text-mode)
+
+;; This can be made a no-op once all modes that use text-mode-hook
+;; are "derived" from text-mode.
+(defun text-mode-hook-identify ()
+ "Mark that this mode has run `text-mode-hook'.
+This is how `toggle-text-mode-auto-fill' knows which buffers to operate on."
+ (set (make-local-variable 'text-mode-variant) t))
+
+(add-hook 'text-mode-hook 'text-mode-hook-identify)
+
+(defun toggle-text-mode-auto-fill ()
+ "Toggle whether to use Auto Fill in Text mode and related modes.
+This command affects all buffers that use modes related to Text mode,
+both existing buffers and buffers that you subsequently create."
+ (interactive)
+ (let ((enable-mode (not (memq 'turn-on-auto-fill text-mode-hook))))
+ (if enable-mode
+ (add-hook 'text-mode-hook 'turn-on-auto-fill)
+ (remove-hook 'text-mode-hook 'turn-on-auto-fill))
+ (dolist (buffer (buffer-list))
+ (with-current-buffer buffer
+ (if (or (derived-mode-p 'text-mode) text-mode-variant)
+ (auto-fill-mode (if enable-mode 1 0)))))
+ (message "Auto Fill %s in Text modes"
+ (if enable-mode "enabled" "disabled"))))
+\f
+(defun center-paragraph ()
+ "Center each nonblank line in the paragraph at or after point.
+See `center-line' for more info."
+ (interactive)
+ (save-excursion
+ (forward-paragraph)
+ (or (bolp) (newline 1))
+ (let ((end (point)))
+ (backward-paragraph)
+ (center-region (point) end))))
+
+(defun center-region (from to)
+ "Center each nonblank line starting in the region.
+See `center-line' for more info."
+ (interactive "r")
+ (if (> from to)
+ (let ((tem to))
+ (setq to from from tem)))
+ (save-excursion
+ (save-restriction
+ (narrow-to-region from to)
+ (goto-char from)
+ (while (not (eobp))
+ (or (save-excursion (skip-chars-forward " \t") (eolp))
+ (center-line))
+ (forward-line 1)))))
+
+(defun center-line (&optional nlines)
+ "Center the line point is on, within the width specified by `fill-column'.
+This means adjusting the indentation so that it equals
+the distance between the end of the text and `fill-column'.
+The argument NLINES says how many lines to center."
+ (interactive "P")
+ (if nlines (setq nlines (prefix-numeric-value nlines)))
+ (while (not (eq nlines 0))
+ (save-excursion
+ (let ((lm (current-left-margin))
+ line-length)
+ (beginning-of-line)
+ (delete-horizontal-space)
+ (end-of-line)
+ (delete-horizontal-space)
+ (setq line-length (current-column))
+ (if (> (- fill-column lm line-length) 0)
+ (indent-line-to
+ (+ lm (/ (- fill-column lm line-length) 2))))))
+ (cond ((null nlines)
+ (setq nlines 0))
+ ((> nlines 0)
+ (setq nlines (1- nlines))
+ (forward-line 1))
+ ((< nlines 0)
+ (setq nlines (1+ nlines))
+ (forward-line -1)))))
+
+;;; arch-tag: a07ccaad-da13-4d7b-9c61-cd04f5926aab
+;;; text-mode.el ends here
HCoop / bpt / emacs.git / blobdiff