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1.1 root 1: ;; Electric Command History Mode
2: ;; Copyright (C) 1985 Free Software Foundation, Inc.
3: ;; Principal author K. Shane Hartman
4:
5: ;; This file is part of GNU Emacs.
6:
7: ;; GNU Emacs is distributed in the hope that it will be useful,
8: ;; but WITHOUT ANY WARRANTY. No author or distributor
9: ;; accepts responsibility to anyone for the consequences of using it
10: ;; or for whether it serves any particular purpose or works at all,
11: ;; unless he says so in writing. Refer to the GNU Emacs General Public
12: ;; License for full details.
13:
14: ;; Everyone is granted permission to copy, modify and redistribute
15: ;; GNU Emacs, but only under the conditions described in the
16: ;; GNU Emacs General Public License. A copy of this license is
17: ;; supposed to have been given to you along with GNU Emacs so you
18: ;; can know your rights and responsibilities. It should be in a
19: ;; file named COPYING. Among other things, the copyright notice
20: ;; and this notice must be preserved on all copies.
21:
22:
23: (require 'electric) ; command loop
24: (require 'chistory) ; history lister
25:
26: (defun Electric-command-history-redo-expression (&optional noconfirm)
27: "Edit current history line in minibuffer and execute result.
28: With prefix argument NOCONFIRM, execute current line as is without editing."
29: (interactive "P")
30: (let (todo)
31: (save-excursion
32: (set-buffer "*Command History*")
33: (beginning-of-line)
34: (setq todo (read (current-buffer)))
35: (if (boundp 'electric-history-in-progress)
36: (if todo (throw 'electric-history-quit (list noconfirm todo)))))))
37:
38: (defvar electric-history-map ())
39: (if electric-history-map
40: ()
41: (setq electric-history-map (make-keymap))
42: (fillarray electric-history-map 'Electric-history-undefined)
43: (define-key electric-history-map "\e" (make-keymap))
44: (fillarray (lookup-key electric-history-map "\e") 'Electric-history-undefined)
45: (define-key electric-history-map "\C-u" 'universal-argument)
46: (define-key electric-history-map " " 'Electric-command-history-redo-expression)
47: (define-key electric-history-map "!" 'Electric-command-history-redo-expression)
48: (define-key electric-history-map "\e\C-x" 'eval-sexp)
49: (define-key electric-history-map "\e\C-d" 'down-list)
50: (define-key electric-history-map "\e\C-u" 'backward-up-list)
51: (define-key electric-history-map "\e\C-b" 'backward-sexp)
52: (define-key electric-history-map "\e\C-f" 'forward-sexp)
53: (define-key electric-history-map "\e\C-a" 'beginning-of-defun)
54: (define-key electric-history-map "\e\C-e" 'end-of-defun)
55: (define-key electric-history-map "\e\C-n" 'forward-list)
56: (define-key electric-history-map "\e\C-p" 'backward-list)
57: (define-key electric-history-map "q" 'Electric-history-quit)
58: (define-key electric-history-map "\C-c" nil)
59: (define-key electric-history-map "\C-c\C-c" 'Electric-history-quit)
60: (define-key electric-history-map "\C-]" 'Electric-history-quit)
61: (define-key electric-history-map "\C-z" 'suspend-emacs)
62: (define-key electric-history-map "\C-h" 'Helper-help)
63: (define-key electric-history-map "?" 'Helper-describe-bindings)
64: (define-key electric-history-map "\e>" 'end-of-buffer)
65: (define-key electric-history-map "\e<" 'beginning-of-buffer)
66: (define-key electric-history-map "\n" 'next-line)
67: (define-key electric-history-map "\r" 'next-line)
68: (define-key electric-history-map "\177" 'previous-line)
69: (define-key electric-history-map "\C-n" 'next-line)
70: (define-key electric-history-map "\C-p" 'previous-line)
71: (define-key electric-history-map "\ev" 'scroll-down)
72: (define-key electric-history-map "\C-v" 'scroll-up)
73: (define-key electric-history-map "\C-l" 'recenter)
74: (define-key electric-history-map "\e\C-v" 'scroll-other-window))
75:
76: (defvar electric-command-history-hook nil
77: "If non-nil, its value is called by electric-command-history.")
78:
79: (defun electric-command-history ()
80: "Major mode for examining and redoing commands from command-history.
81: The number of command listed is controlled by list-command-history-max.
82: The command history is filtered by list-command-history-filter if non-nil.
83: Combines typeout Command History list window with menu like selection
84: of an expression from the history for re-evaluation in the *original* buffer.
85:
86: The history displayed is filtered by list-command-history-filter if non-nil.
87:
88: This pops up a window with the Command History listing. If the very
89: next character typed is Space, the listing is killed and the previous
90: window configuration is restored. Otherwise, you can browse in the
91: Command History with Return moving down and Delete moving up, possibly
92: selecting an expression to be redone with Space or quitting with `Q'.
93:
94: Like Emacs-Lisp Mode except that characters do not insert themselves and
95: Tab and linefeed do not indent. Instead these commands are provided:
96: Space or ! edit then evaluate current line in history inside
97: the ORIGINAL buffer which invoked this mode.
98: The previous window configuration is restored
99: unless the invoked command changes it.
100: C-c C-c, C-], Q Quit and restore previous window configuration.
101: LFD, RET Move to the next line in the history.
102: DEL Move to the previous line in the history.
103: ? Provides a complete list of commands.
104:
105: Calls the value of electric-command-history-hook if that is non-nil
106: The Command History listing is recomputed each time this mode is invoked."
107: (interactive)
108: (let ((electric-history-in-progress t)
109: (old-buffer (current-buffer))
110: (todo))
111: (unwind-protect
112: (setq todo
113: (catch 'electric-history-quit
114: (save-window-excursion
115: (save-window-excursion
116: (list-command-history)
117: (set-buffer "*Command History*")
118: (Command-history-setup 'electric-command-history
119: "Electric History"
120: electric-history-map))
121: (Electric-pop-up-window "*Command History*")
122: (run-hooks 'electric-command-history-hook)
123: (if (eobp)
124: (progn (ding)
125: (message "No command history.")
126: (throw 'electric-history-quit nil))
127: (let ((Helper-return-blurb "return to History"))
128: (Electric-command-loop 'electric-history-quit
129: "->" t))))))
130: (set-buffer "*Command History*")
131: (Command-history-setup)
132: (bury-buffer (current-buffer)))
133: (if (consp todo)
134: (progn (set-buffer old-buffer)
135: (if (car todo)
136: (apply (car (car (cdr todo))) (cdr (car (cdr todo))))
137: (edit-and-eval-command "Redo: " (car (cdr todo))))))))
138:
139: (defun Electric-history-undefined ()
140: (interactive)
141: (ding)
142: (message "Type C-h for help, ? for commands, C-c to quit, Space to execute")
143: (sit-for 4))
144:
145: (defun Electric-history-quit ()
146: "Quit Electric Command History, restoring previous window configuration."
147: (interactive)
148: (if (boundp 'electric-history-in-progress)
149: (progn (message "")
150: (throw 'electric-history-quit nil))))
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