lisp/echistory.el

   1 ;;; echistory.el --- Electric Command History Mode
   2
   3 ;; Copyright (C) 1985, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   4
   5 ;; Author: K. Shane Hartman
   6 ;; Maintainer: FSF
   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
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  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 the
  22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23 ;; Boston, MA 02110-1301, USA.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 (require 'electric)                     ; command loop
  30 (require 'chistory)                     ; history lister
  31
  32 ;;;###autoload
  33 (defun Electric-command-history-redo-expression (&optional noconfirm)
  34   "Edit current history line in minibuffer and execute result.
  35 With prefix arg NOCONFIRM, execute current line as-is without editing."
  36   (interactive "P")
  37   (let (todo)
  38     (save-excursion
  39       (set-buffer "*Command History*")
  40       (beginning-of-line)
  41       (setq todo (read (current-buffer)))
  42       (if (boundp 'electric-history-in-progress)
  43           (if todo (throw 'electric-history-quit (list noconfirm todo)))))))
  44
  45 (defvar electric-history-map ())
  46 (if electric-history-map
  47     ()
  48   (setq electric-history-map (make-sparse-keymap))
  49   (define-key electric-history-map [t] 'Electric-history-undefined)
  50   (define-key electric-history-map "\e" (make-sparse-keymap))
  51   (define-key electric-history-map [?\e t] 'Electric-history-undefined)
  52   (define-key electric-history-map "\C-u" 'universal-argument)
  53   (define-key electric-history-map " " 'Electric-command-history-redo-expression)
  54   (define-key electric-history-map "!" 'Electric-command-history-redo-expression)
  55   (define-key electric-history-map "\e\C-x" 'eval-sexp)
  56   (define-key electric-history-map "\e\C-d" 'down-list)
  57   (define-key electric-history-map "\e\C-u" 'backward-up-list)
  58   (define-key electric-history-map "\e\C-b" 'backward-sexp)
  59   (define-key electric-history-map "\e\C-f" 'forward-sexp)
  60   (define-key electric-history-map "\e\C-a" 'beginning-of-defun)
  61   (define-key electric-history-map "\e\C-e" 'end-of-defun)
  62   (define-key electric-history-map "\e\C-n" 'forward-list)
  63   (define-key electric-history-map "\e\C-p" 'backward-list)
  64   (define-key electric-history-map "q" 'Electric-history-quit)
  65   (define-key electric-history-map "\C-c" nil)
  66   (define-key electric-history-map "\C-c\C-c" 'Electric-history-quit)
  67   (define-key electric-history-map "\C-]" 'Electric-history-quit)
  68   (define-key electric-history-map "\C-z" 'suspend-emacs)
  69   (define-key electric-history-map (char-to-string help-char) 'Helper-help)
  70   (define-key electric-history-map "?" 'Helper-describe-bindings)
  71   (define-key electric-history-map "\e>" 'end-of-buffer)
  72   (define-key electric-history-map "\e<" 'beginning-of-buffer)
  73   (define-key electric-history-map "\n" 'next-line)
  74   (define-key electric-history-map "\r" 'next-line)
  75   (define-key electric-history-map "\177" 'previous-line)
  76   (define-key electric-history-map "\C-n" 'next-line)
  77   (define-key electric-history-map "\C-p" 'previous-line)
  78   (define-key electric-history-map "\ev" 'scroll-down)
  79   (define-key electric-history-map "\C-v" 'scroll-up)
  80   (define-key electric-history-map [home] 'beginning-of-buffer)
  81   (define-key electric-history-map [down] 'next-line)
  82   (define-key electric-history-map [up] 'previous-line)
  83   (define-key electric-history-map [prior] 'scroll-down)
  84   (define-key electric-history-map [next] 'scroll-up)
  85   (define-key electric-history-map "\C-l" 'recenter)
  86   (define-key electric-history-map "\e\C-v" 'scroll-other-window))
  87
  88 (defvar electric-command-history-hook nil
  89   "If non-nil, its value is called by `electric-command-history'.")
  90
  91 (defun electric-command-history ()
  92   "\\<electric-history-map>Major mode for examining and redoing commands from `command-history'.
  93 This pops up a window with the Command History listing.
  94 The number of command listed is controlled by `list-command-history-max'.
  95 The command history is filtered by `list-command-history-filter' if non-nil.
  96 Combines typeout Command History list window with menu like selection
  97 of an expression from the history for re-evaluation in the *original* buffer.
  98
  99 The history displayed is filtered by `list-command-history-filter' if non-nil.
 100
 101 Like Emacs-Lisp mode except that characters do not insert themselves and
 102 Tab and Linefeed do not indent.  Instead these commands are provided:
 103 \\{electric-history-map}
 104
 105 Calls the value of `electric-command-history-hook' if that is non-nil.
 106 The Command History listing is recomputed each time this mode is invoked."
 107   (interactive)
 108   (let ((electric-history-in-progress t)
 109         (old-buffer (current-buffer))
 110         (todo))
 111     (unwind-protect
 112         (setq todo
 113               (catch 'electric-history-quit
 114                 (save-window-excursion
 115                   (save-window-excursion
 116                     (list-command-history)
 117                     (set-buffer "*Command History*")
 118                     (Command-history-setup)
 119                     (setq major-mode 'electric-command-history)
 120                     (setq mode-name "Electric History")
 121                     (use-local-map electric-history-map))
 122                   (Electric-pop-up-window "*Command History*")
 123                   (run-hooks 'electric-command-history-hook)
 124                   (if (eobp)
 125                       (progn (ding)
 126                              (message "No command history.")
 127                              (throw 'electric-history-quit nil))
 128                     (let ((Helper-return-blurb "return to History"))
 129                       (Electric-command-loop 'electric-history-quit
 130                                              "->" t))))))
 131       (set-buffer "*Command History*")
 132       (command-history-mode)
 133       (bury-buffer (current-buffer)))
 134     (if (consp todo)
 135         (progn (set-buffer old-buffer)
 136                (if (car todo)
 137                    (apply (car (car (cdr todo))) (cdr (car (cdr todo))))
 138                  (edit-and-eval-command "Redo: " (car (cdr todo))))))))
 139
 140 (defun Electric-history-undefined ()
 141   (interactive)
 142   (ding)
 143   (message "%s" (substitute-command-keys "Type \\[Helper-help] for help, ? for commands, C-c C-c to quit, Space to execute"))
 144   (sit-for 4))
 145
 146 (defun Electric-history-quit ()
 147   "Quit Electric Command History, restoring previous window configuration."
 148   (interactive)
 149   (if (boundp 'electric-history-in-progress)
 150       (progn (message "")
 151              (throw 'electric-history-quit nil))))
 152
 153 (provide 'echistory)
 154
 155 ;;; arch-tag: 1e5018fe-190f-44a7-9109-a895dcac4c50
 156 ;;; echistory.el ends here