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Annotation of 43BSD/contrib/emacs/lisp/text-mode.el, revision 1.1

1.1     ! root        1: ;; Text mode, and its ideosyncratic commands.
        !             2: ;; Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: (defvar text-mode-syntax-table nil
        !            23:   "Syntax table used while in text mode.")
        !            24: 
        !            25: (defvar text-mode-abbrev-table nil
        !            26:   "Abbrev table used while in text mode.")
        !            27: 
        !            28: (if (null text-mode-syntax-table)
        !            29:     (let ((st (syntax-table)))
        !            30:       (unwind-protect
        !            31:        (progn
        !            32:        (setq text-mode-syntax-table (make-syntax-table))
        !            33:        (set-syntax-table text-mode-syntax-table)
        !            34:        (modify-syntax-entry ?\" ".   ")
        !            35:        (modify-syntax-entry ?\\ ".   ")
        !            36:        (modify-syntax-entry ?' "w   "))
        !            37:        (set-syntax-table st))))
        !            38: 
        !            39: (defvar text-mode-map (make-sparse-keymap))
        !            40: (define-key text-mode-map "\t" 'tab-to-tab-stop)
        !            41: (define-key text-mode-map "\es" 'center-line)
        !            42: (define-key text-mode-map "\eS" 'center-paragraph)
        !            43: 
        !            44: (defun non-saved-text-mode ()
        !            45:   "Like text-mode, but delete auto save file when file is saved for real."
        !            46:   (text-mode)
        !            47:   (make-local-variable 'delete-auto-save-files)
        !            48:   (setq delete-auto-save-files t))
        !            49: 
        !            50: (defun text-mode ()
        !            51:   "Major mode for editing text intended for humans to read.  Special commands:\\{text-mode-map}
        !            52: Turning on text-mode calls the value of the variable text-mode-hook,
        !            53: if that value is non-nil."
        !            54:   (interactive)
        !            55:   (kill-all-local-variables)
        !            56:   (use-local-map text-mode-map)
        !            57:   (setq mode-name "Text")
        !            58:   (setq major-mode 'text-mode)
        !            59:   (define-abbrev-table 'text-mode-abbrev-table ())
        !            60:   (setq local-abbrev-table text-mode-abbrev-table)
        !            61:   (set-syntax-table text-mode-syntax-table)
        !            62:   (run-hooks 'text-mode-hook))
        !            63: 
        !            64: (defvar indented-text-mode-map (make-sparse-keymap))
        !            65: (define-key indented-text-mode-map "\t" 'indent-relative)
        !            66: (define-key indented-text-mode-map "\es" 'center-line)
        !            67: (define-key indented-text-mode-map "\eS" 'center-paragraph)
        !            68: 
        !            69: (defun indented-text-mode ()
        !            70:   "Major mode for editing indented text intended for humans to read.\\{indented-text-mode-map}
        !            71: Turning on indented-text-mode calls the value of the variable text-mode-hook,
        !            72: if that value is non-nil."
        !            73:   (interactive)
        !            74:   (kill-all-local-variables)
        !            75:   (use-local-map text-mode-map)
        !            76:   (define-abbrev-table 'text-mode-abbrev-table ())
        !            77:   (setq local-abbrev-table text-mode-abbrev-table)
        !            78:   (set-syntax-table text-mode-syntax-table)
        !            79:   (make-local-variable 'indent-line-function)
        !            80:   (setq indent-line-function 'indent-relative-maybe)
        !            81:   (use-local-map indented-text-mode-map)
        !            82:   (setq mode-name "Indented Text")
        !            83:   (setq major-mode 'indented-text-mode)
        !            84:   (run-hooks 'text-mode-hook))
        !            85: 
        !            86: (defun center-paragraph ()
        !            87:   "Center each line in the paragraph at or after point.
        !            88: See center-line for more info."
        !            89:   (interactive)
        !            90:   (save-excursion
        !            91:     (forward-paragraph)
        !            92:     (or (bolp) (newline 1))
        !            93:     (let ((end (point)))
        !            94:       (backward-paragraph)
        !            95:       (center-region (point) end))))
        !            96: 
        !            97: (defun center-region (from to)
        !            98:   "Center each line starting in the region.
        !            99: See center-line for more info."
        !           100:   (interactive "r")
        !           101:   (if (> from to)
        !           102:       (let ((tem to))
        !           103:        (setq to from from tem)))
        !           104:   (save-excursion
        !           105:     (goto-char from)
        !           106:     (while (< (point) to)
        !           107:       (center-line)
        !           108:       (forward-line 1))))
        !           109: 
        !           110: (defun center-line ()
        !           111:   "Center the line point is on.
        !           112: This means adjusting its indentation to match
        !           113: the distance between the end of the text and fill-column."
        !           114:   (interactive)
        !           115:   (save-excursion
        !           116:     (let (line-length)
        !           117:       (beginning-of-line)
        !           118:       (delete-horizontal-space)
        !           119:       (end-of-line)
        !           120:       (delete-horizontal-space)
        !           121:       (setq line-length (current-column))
        !           122:       (beginning-of-line)
        !           123:       (indent-to 
        !           124:        (+ left-margin 
        !           125:           (/ (- fill-column left-margin line-length) 2))))))

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