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1 | ;;; chistory.el --- list command history |
2 | ||
9750e079 ER |
3 | ;; Copyright (C) 1985 Free Software Foundation, Inc. |
4 | ||
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5 | ;; Author: K. Shane Hartman |
6 | ;; Maintainer: FSF | |
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7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
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13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
e2fbf49d | 24 | |
e5167999 | 25 | ;;; Commentary: |
e2fbf49d | 26 | |
e2fbf49d | 27 | ;; This really has nothing to do with list-command-history per se, but |
daaf0197 | 28 | ;; its a nice alternative to C-x ESC ESC (repeat-complex-command) and |
e2fbf49d JB |
29 | ;; functions as a lister if given no pattern. It's not important |
30 | ;; enough to warrant a file of its own. | |
31 | ||
e5167999 ER |
32 | ;;; Code: |
33 | ||
4bef9110 SE |
34 | (defgroup chistory nil |
35 | "List command history." | |
36 | :group 'keyboard) | |
37 | ||
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38 | ;;;###autoload |
39 | (defun repeat-matching-complex-command (&optional pattern) | |
40 | "Edit and re-evaluate complex command with name matching PATTERN. | |
41 | Matching occurrences are displayed, most recent first, until you select | |
42 | a form for evaluation. If PATTERN is empty (or nil), every form in the | |
43 | command history is offered. The form is placed in the minibuffer for | |
44 | editing and the result is evaluated." | |
45 | (interactive "sRedo Command (regexp): ") | |
46 | (if pattern | |
daaf0197 KH |
47 | (if (string-match "[^ \t]" pattern) |
48 | (setq pattern (substring pattern (match-beginning 0))) | |
49 | (setq pattern nil))) | |
e2fbf49d JB |
50 | (let ((history command-history) |
51 | (temp) | |
52 | (what)) | |
53 | (while (and history (not what)) | |
54 | (setq temp (car history)) | |
55 | (if (and (or (not pattern) (string-match pattern (symbol-name (car temp)))) | |
daaf0197 | 56 | (y-or-n-p (format "Redo %S? " temp))) |
e2fbf49d JB |
57 | (setq what (car history)) |
58 | (setq history (cdr history)))) | |
59 | (if (not what) | |
60 | (error "Command history exhausted") | |
61 | ;; Try to remove any useless command history element for this command. | |
62 | (if (eq (car (car command-history)) 'repeat-matching-complex-command) | |
63 | (setq command-history (cdr command-history))) | |
64 | (edit-and-eval-command "Redo: " what)))) | |
65 | ||
4bef9110 | 66 | (defcustom default-command-history-filter-garbage |
e2fbf49d JB |
67 | '(command-history-mode |
68 | list-command-history | |
69 | electric-command-history) | |
daaf0197 | 70 | "*A list of symbols to be ignored by `default-command-history-filter'. |
4bef9110 | 71 | If that function is given a list whose car is an element of this list, |
daaf0197 KH |
72 | then it will return non-nil (indicating the list should be discarded from |
73 | the history). | |
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74 | Initially, all commands related to the command history are discarded." |
75 | :type '(repeat symbol) | |
76 | :group 'chistory) | |
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77 | |
78 | (defvar list-command-history-filter 'default-command-history-filter | |
daaf0197 KH |
79 | "Predicate to test which commands should be excluded from the history listing. |
80 | If non-nil, should be the name of a function of one argument. | |
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81 | It is passed each element of the command history when |
82 | \\[list-command-history] is called. If the filter returns non-nil for | |
83 | some element, that element is excluded from the history listing. The | |
84 | default filter removes commands associated with the command-history.") | |
85 | ||
86 | (defun default-command-history-filter (frob) | |
87 | "Filter commands matching `default-command-history-filter-garbage' list | |
88 | from the command history." | |
89 | (or (not (consp frob)) | |
90 | (memq (car frob) default-command-history-filter-garbage))) | |
91 | ||
4bef9110 SE |
92 | (defcustom list-command-history-max 32 |
93 | "*If non-nil, maximum length of the listing produced by `list-command-history'." | |
94 | :type '(choice integer (const nil)) | |
95 | :group 'chistory) | |
e2fbf49d JB |
96 | |
97 | ;;;###autoload | |
98 | (defun list-command-history () | |
99 | "List history of commands typed to minibuffer. | |
100 | The number of commands listed is controlled by `list-command-history-max'. | |
101 | Calls value of `list-command-history-filter' (if non-nil) on each history | |
102 | element to judge if that element should be excluded from the list. | |
103 | ||
104 | The buffer is left in Command History mode." | |
105 | (interactive) | |
106 | (with-output-to-temp-buffer | |
107 | "*Command History*" | |
108 | (let ((history command-history) | |
109 | (buffer-read-only nil) | |
110 | (count (or list-command-history-max -1))) | |
111 | (while (and (/= count 0) history) | |
112 | (if (and (boundp 'list-command-history-filter) | |
113 | list-command-history-filter | |
114 | (funcall list-command-history-filter (car history))) | |
115 | nil | |
116 | (setq count (1- count)) | |
117 | (prin1 (car history)) | |
118 | (terpri)) | |
119 | (setq history (cdr history)))) | |
120 | (save-excursion | |
121 | (set-buffer "*Command History*") | |
122 | (goto-char (point-min)) | |
123 | (if (eobp) | |
124 | (error "No command history") | |
40891308 | 125 | (command-history-mode))))) |
e2fbf49d | 126 | |
40891308 RS |
127 | (defun command-history-mode () |
128 | "Major mode for listing and repeating recent commands." | |
129 | (Command-history-setup) | |
130 | (setq major-mode 'command-history-mode) | |
131 | (setq mode-name "Command History") | |
132 | (use-local-map command-history-map) | |
133 | (run-hooks 'command-history-mode-hook)) | |
134 | ||
135 | (defun Command-history-setup () | |
136 | (kill-all-local-variables) | |
e2fbf49d JB |
137 | (use-local-map (or keymap command-history-map)) |
138 | (lisp-mode-variables nil) | |
139 | (set-syntax-table emacs-lisp-mode-syntax-table) | |
40891308 | 140 | (setq buffer-read-only t)) |
e2fbf49d | 141 | |
4bef9110 SE |
142 | (defcustom command-history-hook nil |
143 | "If non-nil, its value is called on entry to `command-history-mode'." | |
144 | :type 'hook | |
145 | :group 'chistory) | |
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146 | |
147 | (defvar command-history-map nil) | |
690ec649 SS |
148 | (unless command-history-map |
149 | (setq command-history-map (make-sparse-keymap)) | |
150 | (set-keymap-parent command-history-map lisp-mode-shared-map) | |
e2fbf49d JB |
151 | (suppress-keymap command-history-map) |
152 | (define-key command-history-map "x" 'command-history-repeat) | |
153 | (define-key command-history-map "\n" 'next-line) | |
154 | (define-key command-history-map "\r" 'next-line) | |
155 | (define-key command-history-map "\177" 'previous-line)) | |
156 | ||
157 | (defun command-history-repeat () | |
158 | "Repeat the command shown on the current line. | |
159 | The buffer for that command is the previous current buffer." | |
160 | (interactive) | |
161 | (save-excursion | |
162 | (eval (prog1 | |
163 | (save-excursion | |
164 | (beginning-of-line) | |
165 | (read (current-buffer))) | |
166 | (set-buffer | |
dd4e1002 | 167 | (car (cdr (buffer-list)))))))) |
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168 | |
169 | ;;;###autoload | |
40891308 RS |
170 | (defun command-history () |
171 | "Examine commands from `command-history' in a buffer. | |
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172 | The number of commands listed is controlled by `list-command-history-max'. |
173 | The command history is filtered by `list-command-history-filter' if non-nil. | |
174 | Use \\<command-history-map>\\[command-history-repeat] to repeat the command on the current line. | |
175 | ||
176 | Otherwise much like Emacs-Lisp Mode except that there is no self-insertion | |
177 | and digits provide prefix arguments. Tab does not indent. | |
178 | \\{command-history-map} | |
40891308 RS |
179 | |
180 | This command always recompiles the Command History listing | |
181 | and runs the normal hook `command-history-hook'." | |
e2fbf49d JB |
182 | (interactive) |
183 | (list-command-history) | |
184 | (pop-to-buffer "*Command History*") | |
185 | (run-hooks 'command-history-hook)) | |
49116ac0 JB |
186 | |
187 | (provide 'chistory) | |
188 | ||
c0274f38 | 189 | ;;; chistory.el ends here |