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;;; echistory.el --- Electric Command History Mode
;; Copyright (C) 1985, 2001, 2002, 2003, 2004, 2005,
;; 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; Author: K. Shane Hartman
;; Maintainer: FSF
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <>.
;;; Commentary:
;;; Code:
(require 'electric) ; command loop
(require 'chistory) ; history lister
(defun Electric-command-history-redo-expression (&optional noconfirm)
"Edit current history line in minibuffer and execute result.
With prefix arg NOCONFIRM, execute current line as-is without editing."
(interactive "P")
(let (todo)
(with-current-buffer "*Command History*"
(setq todo (read (current-buffer)))
(if (boundp 'electric-history-in-progress)
(if todo (throw 'electric-history-quit (list noconfirm todo)))))))
(defvar electric-history-map
(let ((map (make-sparse-keymap)))
(define-key map [t] 'Electric-history-undefined)
(define-key map "\e" (make-sparse-keymap))
(define-key map [?\e t] 'Electric-history-undefined)
(define-key map "\C-u" 'universal-argument)
(define-key map " " 'Electric-command-history-redo-expression)
(define-key map "!" 'Electric-command-history-redo-expression)
(define-key map "\e\C-x" 'eval-sexp)
(define-key map "\e\C-d" 'down-list)
(define-key map "\e\C-u" 'backward-up-list)
(define-key map "\e\C-b" 'backward-sexp)
(define-key map "\e\C-f" 'forward-sexp)
(define-key map "\e\C-a" 'beginning-of-defun)
(define-key map "\e\C-e" 'end-of-defun)
(define-key map "\e\C-n" 'forward-list)
(define-key map "\e\C-p" 'backward-list)
(define-key map "q" 'Electric-history-quit)
(define-key map "\C-c" nil)
(define-key map "\C-c\C-c" 'Electric-history-quit)
(define-key map "\C-]" 'Electric-history-quit)
(define-key map "\C-z" 'suspend-frame)
(define-key map (char-to-string help-char) 'Helper-help)
(define-key map "?" 'Helper-describe-bindings)
(define-key map "\e>" 'end-of-buffer)
(define-key map "\e<" 'beginning-of-buffer)
(define-key map "\n" 'next-line)
(define-key map "\r" 'next-line)
(define-key map "\177" 'previous-line)
(define-key map "\C-n" 'next-line)
(define-key map "\C-p" 'previous-line)
(define-key map "\ev" 'scroll-down)
(define-key map "\C-v" 'scroll-up)
(define-key map [home] 'beginning-of-buffer)
(define-key map [down] 'next-line)
(define-key map [up] 'previous-line)
(define-key map [prior] 'scroll-down)
(define-key map [next] 'scroll-up)
(define-key map "\C-l" 'recenter)
(define-key map "\e\C-v" 'scroll-other-window)
"Keymap for Electric Command History mode.")
(defvar electric-command-history-hook nil
"If non-nil, its value is called by `electric-command-history'.")
(defun electric-command-history ()
"\\<electric-history-map>Major mode for examining and redoing commands from `command-history'.
This pops up a window with the Command History listing.
The number of command listed is controlled by `list-command-history-max'.
The command history is filtered by `list-command-history-filter' if non-nil.
Combines typeout Command History list window with menu like selection
of an expression from the history for re-evaluation in the *original* buffer.
The history displayed is filtered by `list-command-history-filter' if non-nil.
Like Emacs-Lisp mode except that characters do not insert themselves and
Tab and Linefeed do not indent. Instead these commands are provided:
Calls the value of `electric-command-history-hook' if that is non-nil.
The Command History listing is recomputed each time this mode is invoked."
(let ((electric-history-in-progress t)
(old-buffer (current-buffer))
(setq todo
(catch 'electric-history-quit
(set-buffer "*Command History*")
(setq major-mode 'electric-command-history)
(setq mode-name "Electric History")
(use-local-map electric-history-map))
(Electric-pop-up-window "*Command History*")
(run-hooks 'electric-command-history-hook)
(if (eobp)
(progn (ding)
(message "No command history.")
(throw 'electric-history-quit nil))
(let ((Helper-return-blurb "return to History"))
(Electric-command-loop 'electric-history-quit
"->" t))))))
(set-buffer "*Command History*")
(bury-buffer (current-buffer)))
(if (consp todo)
(progn (set-buffer old-buffer)
(if (car todo)
(apply (car (car (cdr todo))) (cdr (car (cdr todo))))
(edit-and-eval-command "Redo: " (car (cdr todo))))))))
(defun Electric-history-undefined ()
(message "%s" (substitute-command-keys "Type \\[Helper-help] for help, ? for commands, C-c C-c to quit, Space to execute"))
(sit-for 4))
(defun Electric-history-quit ()
"Quit Electric Command History, restoring previous window configuration."
(if (boundp 'electric-history-in-progress)
(progn (message "")
(throw 'electric-history-quit nil))))
(provide 'echistory)
;; arch-tag: 1e5018fe-190f-44a7-9109-a895dcac4c50
;;; echistory.el ends here