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1 | ;;; chistory.el --- list command history |
2 | ||
9750e079 ER |
3 | ;; Copyright (C) 1985 Free Software Foundation, Inc. |
4 | ||
e5167999 ER |
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 | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
e5167999 | 24 | ;;; Commentary: |
e2fbf49d | 25 | |
e2fbf49d | 26 | ;; This really has nothing to do with list-command-history per se, but |
daaf0197 | 27 | ;; its a nice alternative to C-x ESC ESC (repeat-complex-command) and |
e2fbf49d JB |
28 | ;; functions as a lister if given no pattern. It's not important |
29 | ;; enough to warrant a file of its own. | |
30 | ||
e5167999 ER |
31 | ;;; Code: |
32 | ||
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33 | ;;;###autoload |
34 | (defun repeat-matching-complex-command (&optional pattern) | |
35 | "Edit and re-evaluate complex command with name matching PATTERN. | |
36 | Matching occurrences are displayed, most recent first, until you select | |
37 | a form for evaluation. If PATTERN is empty (or nil), every form in the | |
38 | command history is offered. The form is placed in the minibuffer for | |
39 | editing and the result is evaluated." | |
40 | (interactive "sRedo Command (regexp): ") | |
41 | (if pattern | |
daaf0197 KH |
42 | (if (string-match "[^ \t]" pattern) |
43 | (setq pattern (substring pattern (match-beginning 0))) | |
44 | (setq pattern nil))) | |
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45 | (let ((history command-history) |
46 | (temp) | |
47 | (what)) | |
48 | (while (and history (not what)) | |
49 | (setq temp (car history)) | |
50 | (if (and (or (not pattern) (string-match pattern (symbol-name (car temp)))) | |
daaf0197 | 51 | (y-or-n-p (format "Redo %S? " temp))) |
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52 | (setq what (car history)) |
53 | (setq history (cdr history)))) | |
54 | (if (not what) | |
55 | (error "Command history exhausted") | |
56 | ;; Try to remove any useless command history element for this command. | |
57 | (if (eq (car (car command-history)) 'repeat-matching-complex-command) | |
58 | (setq command-history (cdr command-history))) | |
59 | (edit-and-eval-command "Redo: " what)))) | |
60 | ||
61 | (defvar default-command-history-filter-garbage | |
62 | '(command-history-mode | |
63 | list-command-history | |
64 | electric-command-history) | |
daaf0197 KH |
65 | "*A list of symbols to be ignored by `default-command-history-filter'. |
66 | It that function is given a list whose car is an element of this list, | |
67 | then it will return non-nil (indicating the list should be discarded from | |
68 | the history). | |
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69 | Initially, all commands related to the command history are discarded.") |
70 | ||
71 | (defvar list-command-history-filter 'default-command-history-filter | |
daaf0197 KH |
72 | "Predicate to test which commands should be excluded from the history listing. |
73 | If non-nil, should be the name of a function of one argument. | |
e2fbf49d JB |
74 | It is passed each element of the command history when |
75 | \\[list-command-history] is called. If the filter returns non-nil for | |
76 | some element, that element is excluded from the history listing. The | |
77 | default filter removes commands associated with the command-history.") | |
78 | ||
79 | (defun default-command-history-filter (frob) | |
80 | "Filter commands matching `default-command-history-filter-garbage' list | |
81 | from the command history." | |
82 | (or (not (consp frob)) | |
83 | (memq (car frob) default-command-history-filter-garbage))) | |
84 | ||
85 | (defvar list-command-history-max 32 | |
daaf0197 | 86 | "*If non-nil, maximum length of the listing produced by `list-command-history'.") |
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87 | |
88 | ;;;###autoload | |
89 | (defun list-command-history () | |
90 | "List history of commands typed to minibuffer. | |
91 | The number of commands listed is controlled by `list-command-history-max'. | |
92 | Calls value of `list-command-history-filter' (if non-nil) on each history | |
93 | element to judge if that element should be excluded from the list. | |
94 | ||
95 | The buffer is left in Command History mode." | |
96 | (interactive) | |
97 | (with-output-to-temp-buffer | |
98 | "*Command History*" | |
99 | (let ((history command-history) | |
100 | (buffer-read-only nil) | |
101 | (count (or list-command-history-max -1))) | |
102 | (while (and (/= count 0) history) | |
103 | (if (and (boundp 'list-command-history-filter) | |
104 | list-command-history-filter | |
105 | (funcall list-command-history-filter (car history))) | |
106 | nil | |
107 | (setq count (1- count)) | |
108 | (prin1 (car history)) | |
109 | (terpri)) | |
110 | (setq history (cdr history)))) | |
111 | (save-excursion | |
112 | (set-buffer "*Command History*") | |
113 | (goto-char (point-min)) | |
114 | (if (eobp) | |
115 | (error "No command history") | |
116 | (Command-history-setup))))) | |
117 | ||
118 | (defun Command-history-setup (&optional majormode modename keymap) | |
119 | (set-buffer "*Command History*") | |
120 | (use-local-map (or keymap command-history-map)) | |
121 | (lisp-mode-variables nil) | |
122 | (set-syntax-table emacs-lisp-mode-syntax-table) | |
123 | (setq buffer-read-only t) | |
124 | (use-local-map (or keymap command-history-map)) | |
125 | (setq major-mode (or majormode 'command-history-mode)) | |
126 | (setq mode-name (or modename "Command History"))) | |
127 | ||
128 | (defvar command-history-hook nil | |
129 | "If non-nil, its value is called on entry to `command-history-mode'.") | |
130 | ||
131 | (defvar command-history-map nil) | |
132 | (if command-history-map | |
133 | nil | |
134 | (setq command-history-map | |
135 | (nconc (make-sparse-keymap) shared-lisp-mode-map)) | |
136 | (suppress-keymap command-history-map) | |
137 | (define-key command-history-map "x" 'command-history-repeat) | |
138 | (define-key command-history-map "\n" 'next-line) | |
139 | (define-key command-history-map "\r" 'next-line) | |
140 | (define-key command-history-map "\177" 'previous-line)) | |
141 | ||
142 | (defun command-history-repeat () | |
143 | "Repeat the command shown on the current line. | |
144 | The buffer for that command is the previous current buffer." | |
145 | (interactive) | |
146 | (save-excursion | |
147 | (eval (prog1 | |
148 | (save-excursion | |
149 | (beginning-of-line) | |
150 | (read (current-buffer))) | |
151 | (set-buffer | |
dd4e1002 | 152 | (car (cdr (buffer-list)))))))) |
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153 | |
154 | ;;;###autoload | |
155 | (defun command-history-mode () | |
156 | "Major mode for examining commands from `command-history'. | |
157 | The number of commands listed is controlled by `list-command-history-max'. | |
158 | The command history is filtered by `list-command-history-filter' if non-nil. | |
159 | Use \\<command-history-map>\\[command-history-repeat] to repeat the command on the current line. | |
160 | ||
161 | Otherwise much like Emacs-Lisp Mode except that there is no self-insertion | |
162 | and digits provide prefix arguments. Tab does not indent. | |
163 | \\{command-history-map} | |
164 | Calls the value of `command-history-hook' if that is non-nil. | |
165 | The Command History listing is recomputed each time this mode is invoked." | |
166 | (interactive) | |
167 | (list-command-history) | |
168 | (pop-to-buffer "*Command History*") | |
169 | (run-hooks 'command-history-hook)) | |
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170 | |
171 | (provide 'chistory) | |
172 | ||
c0274f38 | 173 | ;;; chistory.el ends here |