+;; chistory -- List command history
+;; Copyright (C) 1985 Richard M. Stallman and K. Shane Hartman
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY. No author or distributor
+;; accepts responsibility to anyone for the consequences of using it
+;; or for whether it serves any particular purpose or works at all,
+;; unless he says so in writing. Refer to the GNU Emacs General Public
+;; License for full details.
+
+;; Everyone is granted permission to copy, modify and redistribute
+;; GNU Emacs, but only under the conditions described in the
+;; GNU Emacs General Public License. A copy of this license is
+;; supposed to have been given to you along with GNU Emacs so you
+;; can know your rights and responsibilities. It should be in a
+;; file named COPYING. Among other things, the copyright notice
+;; and this notice must be preserved on all copies.
+
+
+(provide 'chistory)
+
+;; This really has nothing to do with list-command-history per se, but
+;; its a nice alternative to C-x ESC (repeat-complex-command) and
+;; functions as a lister if given no pattern. It's not important
+;; enough to warrant a file of its own.
+
+(defun repeat-matching-complex-command (&optional pattern)
+ "Edit and re-evaluate complex command with name matching PATTERN.
+Matching occurrences are displayed, most recent first, until you
+select a form for evaluation. If PATTERN is empty (or nil), every form
+in the command history is offered. The form is placed in the minibuffer
+for editing and the result is evaluated."
+ (interactive "sRedo Command (regexp): ")
+ (if pattern
+ (if (equal (setq pattern
+ (substring pattern
+ (or (string-match "[ \t]*[^ \t]" pattern)
+ (length pattern))))
+ "")
+ (setq pattern nil)))
+ (let ((history command-history)
+ (temp)
+ (what))
+ (while (and history (not what))
+ (setq temp (car history))
+ (if (and (or (not pattern) (string-match pattern (symbol-name (car temp))))
+ (y-or-n-p (format "Redo %s? " (setq temp (prin1-to-string temp)))))
+ (setq what (car history))
+ (setq history (cdr history))))
+ (if (not what)
+ (error "Command history exhausted.")
+ (edit-and-eval-command "Redo: " what))))
+
+(defvar default-command-history-filter-garbage
+ '(command-history-mode
+ list-command-history
+ electric-command-history)
+ "*A list of symbols. If default-list-command-history-filter is
+given a list whose car is an element of this list, then it will return
+non-nil (indicating the list should be discarded from the history).
+Initially, all commands related to the command history are discarded.")
+
+(defvar list-command-history-filter 'default-command-history-filter
+ "If non-nil, should be the name of a function of one argument.
+It is passed each element of the command history when
+\\[list-command-history] is called. If the filter returns non-nil for
+some element, that element is excluded from the history listing. The
+default filter removes commands associated with the command-history.")
+
+(defun default-command-history-filter (frob)
+ "Filter commands matching default-command-history-filter-garbage list
+from the command history."
+ (or (not (consp frob))
+ (memq (car frob) default-command-history-filter-garbage)))
+
+(defvar list-command-history-max 32
+ "*If non-nil, should be a positive number which specifies the maximum
+length of the Command History listing produced by list-command-history.")
+
+(defun list-command-history ()
+ "List history of commands typed to minibuffer.
+The number of commands listed is controlled by list-command-history-max.
+Calls value of list-command-history-filter (if non-nil) on each history
+element to judge if that element should be excluded from the list.
+
+The buffer is left in Command History mode."
+ (interactive)
+ (with-output-to-temp-buffer
+ "*Command History*"
+ (let ((history command-history)
+ (buffer-read-only nil)
+ (count (or list-command-history-max -1)))
+ (while (and (/= count 0) history)
+ (if (and (boundp 'list-command-history-filter)
+ list-command-history-filter
+ (funcall list-command-history-filter (car history)))
+ nil
+ (setq count (1- count))
+ (prin1 (car history))
+ (terpri))
+ (setq history (cdr history))))
+ (goto-char (point-min))
+ (if (eobp)
+ (error "No command history.")
+ (Command-history-setup))))
+
+(defun Command-history-setup (&optional majormode modename keymap)
+ (set-buffer "*Command History*")
+ (use-local-map (or keymap command-history-map))
+ (lisp-mode-variables)
+ (set-syntax-table lisp-mode-syntax-table)
+ (setq buffer-read-only t)
+ (use-local-map (or keymap command-history-map))
+ (setq major-mode (or majormode 'command-history-mode))
+ (setq mode-name (or modename "Command History")))
+
+(defvar command-history-hook nil
+ "If non-nil, its value is called on entry to command-history-mode.")
+
+(defvar command-history-map nil)
+(if command-history-map
+ nil
+ (setq command-history-map (make-keymap))
+ (lisp-mode-commands command-history-map)
+ (suppress-keymap command-history-map)
+ (define-key command-history-map "\n" 'next-line)
+ (define-key command-history-map "\r" 'next-line)
+ (define-key command-history-map "\177" 'previous-line))
+
+(defun command-history-mode ()
+ "Major mode for examining commands from command-history.
+The number of commands listed is controlled by list-command-history-max.
+The command history is filtered by list-command-history-filter if non-nil.
+
+Like Emacs-Lisp Mode except that characters do not insert themselves and
+Digits provide prefix arguments. Tab does not indent.
+\\{command-history-map}
+Calls the value of command-history-hook if that is non-nil
+The Command History listing is recomputed each time this mode is
+invoked."
+ (interactive)
+ (list-command-history)
+ (pop-to-buffer "*Command History*")
+ (run-hooks 'command-history-hook))
+
+
+
projects / unix-history / commitdiff