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1 ;;; echistory.el --- Electric Command History Mode
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2
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3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
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4
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5 ;; Author: K. Shane Hartman
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6 ;; Maintainer: FSF
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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23
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24 ;;; Synched up with: FSF 19.30.
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25
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26 ;;; Code:
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27
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28 (require 'electric) ; command loop
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29 (require 'chistory) ; history lister
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30
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31 ;;;###autoload
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32 (defun Electric-command-history-redo-expression (&optional noconfirm)
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33 "Edit current history line in minibuffer and execute result.
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34 With prefix argument NOCONFIRM, execute current line as-is without editing."
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35 (interactive "P")
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36 (let (todo)
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37 (save-excursion
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38 (set-buffer "*Command History*")
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39 (beginning-of-line)
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40 (setq todo (read (current-buffer)))
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41 (if (boundp 'electric-history-in-progress)
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42 (if todo (throw 'electric-history-quit (list noconfirm todo)))))))
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43
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44 (defvar electric-history-map ())
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45 (if electric-history-map
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46 ()
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47 (setq electric-history-map (make-keymap))
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48 (set-keymap-name electric-history-map 'electric-history-map)
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49 (set-keymap-default-binding electric-history-map 'Electric-history-undefined)
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50 (define-key electric-history-map "\C-u" 'universal-argument)
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51 (define-key electric-history-map " " 'Electric-command-history-redo-expression)
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52 (define-key electric-history-map "!" 'Electric-command-history-redo-expression)
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53 (define-key electric-history-map "\e\C-x" 'eval-sexp)
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54 (define-key electric-history-map "\e\C-d" 'down-list)
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55 (define-key electric-history-map "\e\C-u" 'backward-up-list)
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56 (define-key electric-history-map "\e\C-b" 'backward-sexp)
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57 (define-key electric-history-map "\e\C-f" 'forward-sexp)
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58 (define-key electric-history-map "\e\C-a" 'beginning-of-defun)
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59 (define-key electric-history-map "\e\C-e" 'end-of-defun)
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60 (define-key electric-history-map "\e\C-n" 'forward-list)
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61 (define-key electric-history-map "\e\C-p" 'backward-list)
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62 (define-key electric-history-map "q" 'Electric-history-quit)
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63 (define-key electric-history-map "\C-c" nil)
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64 (define-key electric-history-map "\C-c\C-c" 'Electric-history-quit)
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65 (define-key electric-history-map "\C-]" 'Electric-history-quit)
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66 (define-key electric-history-map "\C-z" 'suspend-emacs)
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67 ;; (define-key electric-history-map "\C-h" 'Helper-help)
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68 (define-key electric-history-map '(control h) 'Helper-help)
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69 (define-key electric-history-map 'backspace 'previous-line)
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70 (define-key electric-history-map "?" 'Helper-describe-bindings)
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71 (define-key electric-history-map "\e>" 'end-of-buffer)
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72 (define-key electric-history-map "\e<" 'beginning-of-buffer)
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73 (define-key electric-history-map "\n" 'next-line)
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74 (define-key electric-history-map "\r" 'next-line)
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75 (define-key electric-history-map "\177" 'previous-line)
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76 (define-key electric-history-map "\C-n" 'next-line)
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77 (define-key electric-history-map "\C-p" 'previous-line)
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78 (define-key electric-history-map "\ev" 'scroll-down)
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79 (define-key electric-history-map "\C-v" 'scroll-up)
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80 (define-key electric-history-map [home] 'beginning-of-buffer)
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81 (define-key electric-history-map [down] 'next-line)
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82 (define-key electric-history-map [up] 'previous-line)
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83 (define-key electric-history-map [prior] 'scroll-down)
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84 (define-key electric-history-map [next] 'scroll-up)
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85 (define-key electric-history-map "\C-l" 'recenter)
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86 (define-key electric-history-map "\e\C-v" 'scroll-other-window))
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87
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88 (defvar electric-command-history-hook nil
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89 "If non-nil, its value is called by `electric-command-history'.")
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90
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91 ;;;###autoload
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92 (defun electric-command-history ()
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93 "\\<electric-history-map>Major mode for examining and redoing commands from `command-history'.
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94 This pops up a window with the Command History listing.
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95 The number of command listed is controlled by `list-command-history-max'.
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96 The command history is filtered by `list-command-history-filter' if non-nil.
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97 Combines typeout Command History list window with menu like selection
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98 of an expression from the history for re-evaluation in the *original* buffer.
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99
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100 The history displayed is filtered by `list-command-history-filter' if non-nil.
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101
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102 This pops up a window with the Command History listing. If the very
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103 next character typed is Space, the listing is killed and the previous
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104 window configuration is restored. Otherwise, you can browse in the
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105 Command History with Return moving down and Delete moving up, possibly
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106 selecting an expression to be redone with Space or quitting with `Q'.
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107
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108 Like Emacs-Lisp mode except that characters do not insert themselves and
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109 Tab and Linefeed do not indent. Instead these commands are provided:
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110 \\{electric-history-map}
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111
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112 Calls the value of `electric-command-history-hook' if that is non-nil.
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113 The Command History listing is recomputed each time this mode is invoked."
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114 (interactive)
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115 (let ((electric-history-in-progress t)
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116 (old-buffer (current-buffer))
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117 (todo))
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118 (unwind-protect
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119 (setq todo
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120 (catch 'electric-history-quit
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121 (save-window-excursion
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122 (save-window-excursion
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123 (list-command-history)
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124 (set-buffer "*Command History*")
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125 (Command-history-setup 'electric-command-history
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126 "Electric History"
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127 electric-history-map))
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128 (Electric-pop-up-window "*Command History*")
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129 (run-hooks 'electric-command-history-hook)
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130 (if (eobp)
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131 (progn (ding)
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132 (message "No command history.")
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133 (throw 'electric-history-quit nil))
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134 (let ((Helper-return-blurb "return to History"))
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135 (Electric-command-loop 'electric-history-quit
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136 "->" t))))))
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137 (set-buffer "*Command History*")
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138 (Command-history-setup)
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139 (bury-buffer (current-buffer)))
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140 (if (consp todo)
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141 (progn (set-buffer old-buffer)
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142 (if (car todo)
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143 (apply (car (car (cdr todo))) (cdr (car (cdr todo))))
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144 (edit-and-eval-command "Redo: " (car (cdr todo))))))))
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145
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146 (defun Electric-history-undefined ()
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147 (interactive)
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148 (ding)
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149 (message (substitute-command-keys "Type \\[Helper-help] for help, ? for commands, C-c C-c to quit, Space to execute"))
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150 (sit-for 4))
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151
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152 (defun Electric-history-quit ()
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153 "Quit Electric Command History, restoring previous window configuration."
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154 (interactive)
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155 (if (boundp 'electric-history-in-progress)
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156 (progn (message nil)
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157 (throw 'electric-history-quit nil))))
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158
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159 ;;; echistory.el ends here
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