130 lines
4.3 KiB
EmacsLisp
130 lines
4.3 KiB
EmacsLisp
;; Text mode, and its ideosyncratic commands.
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;; Copyright (C) 1985 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 1, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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(defvar text-mode-syntax-table nil
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"Syntax table used while in text mode.")
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(defvar text-mode-abbrev-table nil
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"Abbrev table used while in text mode.")
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(define-abbrev-table 'text-mode-abbrev-table ())
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(if text-mode-syntax-table
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()
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(setq text-mode-syntax-table (make-syntax-table))
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(modify-syntax-entry ?\" ". " text-mode-syntax-table)
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(modify-syntax-entry ?\\ ". " text-mode-syntax-table)
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(modify-syntax-entry ?' "w " text-mode-syntax-table))
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(defvar text-mode-map nil "")
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(if text-mode-map
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()
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(setq text-mode-map (make-sparse-keymap))
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(define-key text-mode-map "\t" 'tab-to-tab-stop)
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(define-key text-mode-map "\es" 'center-line)
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(define-key text-mode-map "\eS" 'center-paragraph))
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;(defun non-saved-text-mode ()
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; "Like text-mode, but delete auto save file when file is saved for real."
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; (text-mode)
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; (make-local-variable 'delete-auto-save-files)
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; (setq delete-auto-save-files t))
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(defun text-mode ()
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"Major mode for editing text intended for humans to read. Special commands:\\{text-mode-map}
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Turning on text-mode calls the value of the variable text-mode-hook,
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if that value is non-nil."
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(interactive)
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(kill-all-local-variables)
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(use-local-map text-mode-map)
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(setq mode-name "Text")
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(setq major-mode 'text-mode)
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(setq local-abbrev-table text-mode-abbrev-table)
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(set-syntax-table text-mode-syntax-table)
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(run-hooks 'text-mode-hook))
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(defvar indented-text-mode-map ())
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(if indented-text-mode-map
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()
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(setq indented-text-mode-map (make-sparse-keymap))
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(define-key indented-text-mode-map "\t" 'indent-relative)
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(define-key indented-text-mode-map "\es" 'center-line)
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(define-key indented-text-mode-map "\eS" 'center-paragraph))
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(defun indented-text-mode ()
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"Major mode for editing indented text intended for humans to read.\\{indented-text-mode-map}
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Turning on indented-text-mode calls the value of the variable text-mode-hook,
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if that value is non-nil."
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(interactive)
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(kill-all-local-variables)
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(use-local-map text-mode-map)
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(define-abbrev-table 'text-mode-abbrev-table ())
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(setq local-abbrev-table text-mode-abbrev-table)
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(set-syntax-table text-mode-syntax-table)
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(make-local-variable 'indent-line-function)
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(setq indent-line-function 'indent-relative-maybe)
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(use-local-map indented-text-mode-map)
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(setq mode-name "Indented Text")
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(setq major-mode 'indented-text-mode)
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(run-hooks 'text-mode-hook))
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(defun center-paragraph ()
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"Center each line in the paragraph at or after point.
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See center-line for more info."
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(interactive)
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(save-excursion
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(forward-paragraph)
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(or (bolp) (newline 1))
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(let ((end (point)))
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(backward-paragraph)
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(center-region (point) end))))
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(defun center-region (from to)
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"Center each line starting in the region.
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See center-line for more info."
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(interactive "r")
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(if (> from to)
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(let ((tem to))
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(setq to from from tem)))
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(save-excursion
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(save-restriction
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(narrow-to-region from to)
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(goto-char from)
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(while (not (eobp))
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(center-line)
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(forward-line 1)))))
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(defun center-line ()
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"Center the line point is on, within the width specified by `fill-column'.
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This means adjusting the indentation to match
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the distance between the end of the text and `fill-column'."
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(interactive)
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(save-excursion
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(let (line-length)
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(beginning-of-line)
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(delete-horizontal-space)
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(end-of-line)
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(delete-horizontal-space)
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(setq line-length (current-column))
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(beginning-of-line)
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(indent-to
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(+ left-margin
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(/ (- fill-column left-margin line-length) 2))))))
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