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1.1 root 1: ;; Electric Command History Mode
2: ;; Copyright (C) 1985 Richard M. Stallman and K. Shane Hartman
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: (require 'electric) ; command loop
23: (require 'chistory) ; history lister
24:
25: (defun Electric-command-history-redo-expression (&optional noconfirm)
26: "Edit current history line in minibuffer and execute result.
27: With prefix argument NOCONFIRM, execute current line as is without editing."
28: (interactive "P")
29: (let (todo)
30: (save-excursion
31: (set-buffer "*Command History*")
32: (beginning-of-line)
33: (setq todo (read (current-buffer)))
34: (if (boundp 'electric-history-in-progress)
35: (if todo (throw 'electric-history-quit (list noconfirm todo)))))))
36:
37: (defconst electric-history-map (make-keymap))
38: (fillarray electric-history-map 'Electric-history-undefined)
39: (define-key electric-history-map "\e" (make-keymap))
40: (fillarray (lookup-key electric-history-map "\e") 'Electric-history-undefined)
41: (define-key electric-history-map "\C-u" 'universal-argument)
42: (define-key electric-history-map " " 'Electric-command-history-redo-expression)
43: (define-key electric-history-map "!" 'Electric-command-history-redo-expression)
44: (define-key electric-history-map "\e\C-x" 'eval-sexp)
45: (define-key electric-history-map "\e\C-d" 'down-list)
46: (define-key electric-history-map "\e\C-u" 'backward-up-list)
47: (define-key electric-history-map "\e\C-b" 'backward-sexp)
48: (define-key electric-history-map "\e\C-f" 'forward-sexp)
49: (define-key electric-history-map "\e\C-a" 'beginning-of-defun)
50: (define-key electric-history-map "\e\C-e" 'end-of-defun)
51: (define-key electric-history-map "\e\C-n" 'forward-list)
52: (define-key electric-history-map "\e\C-p" 'backward-list)
53: (define-key electric-history-map "q" 'Electric-history-quit)
54: (define-key electric-history-map "\C-c" nil)
55: (define-key electric-history-map "\C-c\C-c" 'Electric-history-quit)
56: (define-key electric-history-map "\C-]" 'Electric-history-quit)
57: (define-key electric-history-map "\C-z" 'suspend-emacs)
58: (define-key electric-history-map "\C-h" 'Helper-help)
59: (define-key electric-history-map "?" 'Helper-describe-bindings)
60: (define-key electric-history-map "\e>" 'end-of-buffer)
61: (define-key electric-history-map "\e<" 'beginning-of-buffer)
62: (define-key electric-history-map "\n" 'next-line)
63: (define-key electric-history-map "\r" 'next-line)
64: (define-key electric-history-map "\177" 'previous-line)
65: (define-key electric-history-map "\C-n" 'next-line)
66: (define-key electric-history-map "\C-p" 'previous-line)
67: (define-key electric-history-map "\ev" 'scroll-down)
68: (define-key electric-history-map "\C-v" 'scroll-up)
69: (define-key electric-history-map "\C-l" 'recenter)
70: (define-key electric-history-map "\e\C-v" 'scroll-other-window)
71:
72: (defvar electric-command-history-hook nil
73: "If non-nil, its value is called by electric-command-history.")
74:
75: (defun electric-command-history ()
76: "Major mode for examining and redoing commands from command-history.
77: The number of command listed is controlled by list-command-history-max.
78: The command history is filtered by list-command-history-filter if non-nil.
79: Combines typeout Command History list window with menu like selection
80: of an expression from the history for re-evaluation in the *original* buffer.
81:
82: The history displayed is filtered by list-command-history-filter if non-nil.
83:
84: This pops up a window with the Command History listing. If the very
85: next character typed is Space, the listing is killed and the previous
86: window configuration is restored. Otherwise, you can browse in the
87: Command History with Return moving down and Delete moving up, possibly
88: selecting an expression to be redone with Space or quitting with `Q'.
89:
90: Like Emacs-Lisp Mode except that characters do not insert themselves and
91: Tab and linefeed do not indent. Instead these commands are provided:
92: Space or ! edit then evaluate current line in history inside
93: the ORIGINAL buffer which invoked this mode.
94: The previous window configuration is restored
95: unless the invoked command changes it.
96: C-c C-c, C-], Q Quit and restore previous window configuration.
97: LFD, RET Move to the next line in the history.
98: DEL Move to the previous line in the history.
99: ? Provides a complete list of commands.
100:
101: Calls the value of electric-command-history-hook if that is non-nil
102: The Command History listing is recomputed each time this mode is invoked."
103: (interactive)
104: (let ((electric-history-in-progress t)
105: (old-buffer (current-buffer))
106: (todo))
107: (unwind-protect
108: (setq todo
109: (catch 'electric-history-quit
110: (save-window-excursion
111: (save-window-excursion
112: (list-command-history)
113: (set-buffer "*Command History*")
114: (Command-history-setup 'electric-command-history
115: "Electric History"
116: electric-history-map))
117: (Electric-pop-up-window "*Command History*")
118: (run-hooks 'electric-command-history-hook)
119: (let ((mode-line-format "-- %[%m%] %M ----%3p-%-"))
120: (if (eobp)
121: (progn (ding)
122: (message "No command history.")
123: (throw 'electric-history-quit nil))
124: (let ((Helper-mode-name "Electric History")
125: (Helper-major-mode 'electric-command-history)
126: (Helper-return-blurb "return to History"))
127: (Electric-command-loop 'electric-history-quit "->" t)))))))
128: (set-buffer "*Command History*")
129: (Command-history-setup)
130: (bury-buffer (current-buffer)))
131: (if (consp todo)
132: (progn (set-buffer old-buffer)
133: (if (car todo)
134: (apply (car (car (cdr todo))) (cdr (car (cdr todo))))
135: (edit-and-eval-command "Redo: " (car (cdr todo))))))))
136:
137: (defun Electric-history-undefined ()
138: (interactive)
139: (ding)
140: (message "Type C-h for help, ? for commands, C-c to quit, Space to execute")
141: (sit-for 4))
142:
143: (defun Electric-history-quit ()
144: "Quit Electric Command History, restoring previous window configuration."
145: (interactive)
146: (if (boundp 'electric-history-in-progress)
147: (progn (message "")
148: (throw 'electric-history-quit nil))))
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