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Up to [CSRG BSD Unix] / 43BSDReno / contrib / emacs-18.55 / lisp|
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1.1 root 1: ;; Text mode, and its ideosyncratic commands.
2: ;; Copyright (C) 1985 Free Software Foundation, Inc.
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: (define-abbrev-table 'text-mode-abbrev-table ())
28:
29: (if text-mode-syntax-table
30: ()
31: (setq text-mode-syntax-table (make-syntax-table))
32: (modify-syntax-entry ?\" ". " text-mode-syntax-table)
33: (modify-syntax-entry ?\\ ". " text-mode-syntax-table)
34: (modify-syntax-entry ?' "w " text-mode-syntax-table))
35:
36: (defvar text-mode-map nil "")
37: (if text-mode-map
38: ()
39: (setq 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:
45: ;(defun non-saved-text-mode ()
46: ; "Like text-mode, but delete auto save file when file is saved for real."
47: ; (text-mode)
48: ; (make-local-variable 'delete-auto-save-files)
49: ; (setq delete-auto-save-files t))
50:
51: (defun text-mode ()
52: "Major mode for editing text intended for humans to read. Special commands:\\{text-mode-map}
53: Turning on text-mode calls the value of the variable text-mode-hook,
54: if that value is non-nil."
55: (interactive)
56: (kill-all-local-variables)
57: (use-local-map text-mode-map)
58: (setq mode-name "Text")
59: (setq major-mode 'text-mode)
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 ())
65: (if indented-text-mode-map
66: ()
67: (setq indented-text-mode-map (make-sparse-keymap))
68: (define-key indented-text-mode-map "\t" 'indent-relative)
69: (define-key indented-text-mode-map "\es" 'center-line)
70: (define-key indented-text-mode-map "\eS" 'center-paragraph))
71:
72: (defun indented-text-mode ()
73: "Major mode for editing indented text intended for humans to read.\\{indented-text-mode-map}
74: Turning on indented-text-mode calls the value of the variable text-mode-hook,
75: if that value is non-nil."
76: (interactive)
77: (kill-all-local-variables)
78: (use-local-map text-mode-map)
79: (define-abbrev-table 'text-mode-abbrev-table ())
80: (setq local-abbrev-table text-mode-abbrev-table)
81: (set-syntax-table text-mode-syntax-table)
82: (make-local-variable 'indent-line-function)
83: (setq indent-line-function 'indent-relative-maybe)
84: (use-local-map indented-text-mode-map)
85: (setq mode-name "Indented Text")
86: (setq major-mode 'indented-text-mode)
87: (run-hooks 'text-mode-hook))
88:
89: (defun center-paragraph ()
90: "Center each line in the paragraph at or after point.
91: See center-line for more info."
92: (interactive)
93: (save-excursion
94: (forward-paragraph)
95: (or (bolp) (newline 1))
96: (let ((end (point)))
97: (backward-paragraph)
98: (center-region (point) end))))
99:
100: (defun center-region (from to)
101: "Center each line starting in the region.
102: See center-line for more info."
103: (interactive "r")
104: (if (> from to)
105: (let ((tem to))
106: (setq to from from tem)))
107: (save-excursion
108: (save-restriction
109: (narrow-to-region from to)
110: (goto-char from)
111: (while (not (eobp))
112: (center-line)
113: (forward-line 1)))))
114:
115: (defun center-line ()
116: "Center the line point is on, within the width specified by `fill-column'.
117: This means adjusting the indentation to match
118: the distance between the end of the text and `fill-column'."
119: (interactive)
120: (save-excursion
121: (let (line-length)
122: (beginning-of-line)
123: (delete-horizontal-space)
124: (end-of-line)
125: (delete-horizontal-space)
126: (setq line-length (current-column))
127: (beginning-of-line)
128: (indent-to
129: (+ left-margin
130: (/ (- fill-column left-margin line-length) 2))))))
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