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428
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1 ;; keymap.el --- Keymap functions for XEmacs.
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2
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3 ;; Copyright (C) 1993-4, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: internals, dumped
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;;; Synched up with: FSF 19.28.
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27
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28 ;;; Commentary:
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29
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30 ;; This file is dumped with XEmacs.
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31
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32 ;;; Note: FSF does not have a file keymap.el. This stuff is
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33 ;;; in keymap.c.
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34
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35 ;Prevent the \{...} documentation construct
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36 ;from mentioning keys that run this command.
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37
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38 ;;; Code:
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39
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40 (put 'undefined 'suppress-keymap t)
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41
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42 (defun undefined ()
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43 (interactive)
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44 (ding))
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45
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46 (defmacro kbd (keys)
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47 "Convert KEYS to the internal Emacs key representation.
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48 KEYS should be a string in the format used for saving keyboard macros
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49 \(see `insert-kbd-macro')."
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50 (if (or (stringp keys)
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51 (vectorp keys))
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52 (read-kbd-macro keys)
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53 `(read-kbd-macro ,keys)))
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54
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55 (defun suppress-keymap (map &optional nodigits)
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56 "Make MAP override all normally self-inserting keys to be undefined.
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57 Normally, as an exception, digits and minus-sign are set to make prefix args,
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58 but optional second arg NODIGITS non-nil treats them like other chars."
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59 (substitute-key-definition 'self-insert-command 'undefined map global-map)
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60 (or nodigits
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61 (let ((string (make-string 1 ?0)))
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62 (define-key map "-" 'negative-argument)
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63 ;; Make plain numbers do numeric args.
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64 (while (<= (aref string 0) ?9)
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65 (define-key map string 'digit-argument)
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66 (incf (aref string 0))))))
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67
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68 (defun substitute-key-definition (olddef newdef keymap &optional oldmap prefix)
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69 "Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF.
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70 In other words, OLDDEF is replaced with NEWDEF wherever it appears.
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71 Prefix keymaps are checked recursively. If optional fourth argument OLDMAP
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72 is specified, we redefine in KEYMAP as NEWDEF those chars which are defined
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444
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73 as OLDDEF in OLDMAP, unless that keybinding is already present in KEYMAP.
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74 If optional fifth argument PREFIX is non-nil, then only those occurrences of
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428
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75 OLDDEF found in keymaps accessible through the keymap bound to PREFIX in
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76 KEYMAP are redefined. See also `accessible-keymaps'."
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77 (let ((maps (accessible-keymaps (or oldmap keymap) prefix))
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78 (shadowing (not (null oldmap)))
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79 prefix map)
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80 (while maps
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81 (setq prefix (car (car maps))
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82 map (cdr (car maps))
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83 maps (cdr maps))
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84 ;; Substitute in this keymap
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85 (map-keymap #'(lambda (key binding)
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86 (if (eq binding olddef)
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87 ;; The new bindings always go in KEYMAP even if we
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88 ;; found them in OLDMAP or one of its children.
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89 ;; If KEYMAP will be shadowing OLDMAP, then do not
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90 ;; redefine the key if there is another binding
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91 ;; in KEYMAP that will shadow OLDDEF.
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92 (or (and shadowing
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93 (lookup-key keymap key))
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94 ;; define-key will give an error if a prefix
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95 ;; of the key is already defined. Otherwise
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96 ;; it will define the key in the map.
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97 ;; #### - Perhaps this should be protected?
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98 (define-key
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99 keymap
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100 (vconcat prefix (list key))
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101 newdef))))
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102 map)
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103 )))
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104
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105
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106 ;; This used to wrap forms into an interactive lambda. It is unclear
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107 ;; to me why this is needed in this function. Anyway,
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108 ;; `key-or-menu-binding' doesn't do it, so this function no longer
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109 ;; does it, either.
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110 (defun insert-key-binding (key) ; modeled after describe-key
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111 "Insert the command bound to KEY."
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112 (interactive "kInsert command bound to key: ")
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113 (let ((defn (key-or-menu-binding key)))
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114 (if (or (null defn) (integerp defn))
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115 (error "%s is undefined" (key-description key))
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116 (if (or (stringp defn) (vectorp defn))
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117 (setq defn (key-binding defn))) ;; a keyboard macro
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118 (insert (format "%s" defn)))))
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119
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120 (defun read-command-or-command-sexp (prompt)
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121 "Read a command symbol or command sexp.
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122 A command sexp is wrapped in an interactive lambda if needed.
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123 Prompts with PROMPT."
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124 ;; Todo: it would be better if we could reject symbols that are not
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125 ;; commandp (as does 'read-command') but that is not easy to do
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126 ;; because we must supply arg4 = require-match = nil for sexp case.
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127 (let ((result (car (read-from-string
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128 (completing-read prompt obarray 'commandp)))))
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129 (if (and (consp result)
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130 (not (eq (car result) 'lambda)))
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131 `(lambda ()
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132 (interactive)
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133 ,result)
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134 result)))
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135
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444
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136 (defun local-key-binding (keys &optional accept-defaults)
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428
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137 "Return the binding for command KEYS in current local keymap only.
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138 KEYS is a string, a vector of events, or a vector of key-description lists
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139 as described in the documentation for the `define-key' function.
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140 The binding is probably a symbol with a function definition; see
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141 the documentation for `lookup-key' for more information."
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142 (let ((map (current-local-map)))
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143 (if map
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444
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144 (lookup-key map keys accept-defaults)
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428
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145 nil)))
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146
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444
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147 (defun global-key-binding (keys &optional accept-defaults)
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428
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148 "Return the binding for command KEYS in current global keymap only.
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149 KEYS is a string or vector of events, a sequence of keystrokes.
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150 The binding is probably a symbol with a function definition; see
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151 the documentation for `lookup-key' for more information."
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444
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152 (lookup-key (current-global-map) keys accept-defaults))
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428
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153
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154 (defun global-set-key (key command)
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155 "Give KEY a global binding as COMMAND.
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156 COMMAND is a symbol naming an interactively-callable function.
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157 KEY is a string, a vector of events, or a vector of key-description lists
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158 as described in the documentation for the `define-key' function.
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159 Note that if KEY has a local binding in the current buffer
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160 that local binding will continue to shadow any global binding."
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161 ;;(interactive "KSet key globally: \nCSet key %s to command: ")
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162 (interactive (list (setq key (read-key-sequence "Set key globally: "))
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163 ;; Command sexps are allowed here so that this arg
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164 ;; may be supplied interactively via insert-key-binding.
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165 (read-command-or-command-sexp
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166 (format "Set key %s to command: "
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167 (key-description key)))))
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168 (define-key (current-global-map) key command)
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169 nil)
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170
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171 (defun local-set-key (key command)
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172 "Give KEY a local binding as COMMAND.
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173 COMMAND is a symbol naming an interactively-callable function.
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174 KEY is a string, a vector of events, or a vector of key-description lists
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175 as described in the documentation for the `define-key' function.
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176 The binding goes in the current buffer's local map,
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177 which is shared with other buffers in the same major mode."
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178 ;;(interactive "KSet key locally: \nCSet key %s locally to command: ")
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179 (interactive (list (setq key (read-key-sequence "Set key locally: "))
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180 ;; Command sexps are allowed here so that this arg
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181 ;; may be supplied interactively via insert-key-binding.
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182 (read-command-or-command-sexp
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183 (format "Set key %s locally to command: "
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184 (key-description key)))))
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185 (if (null (current-local-map))
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186 (use-local-map (make-sparse-keymap)))
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187 (define-key (current-local-map) key command)
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188 nil)
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189
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190 (defun global-unset-key (key)
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191 "Remove global binding of KEY.
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192 KEY is a string, a vector of events, or a vector of key-description lists
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193 as described in the documentation for the `define-key' function."
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194 (interactive "kUnset key globally: ")
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195 (global-set-key key nil))
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196
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197 (defun local-unset-key (key)
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198 "Remove local binding of KEY.
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199 KEY is a string, a vector of events, or a vector of key-description lists
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200 as described in the documentation for the `define-key' function."
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201 (interactive "kUnset key locally: ")
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202 (if (current-local-map)
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203 (define-key (current-local-map) key nil)))
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204
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205
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206 ;; FSF-inherited brain-death.
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207 (defun minor-mode-key-binding (key &optional accept-default)
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208 "Find the visible minor mode bindings of KEY.
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209 Return an alist of pairs (MODENAME . BINDING), where MODENAME is
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210 the symbol which names the minor mode binding KEY, and BINDING is
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211 KEY's definition in that mode. In particular, if KEY has no
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212 minor-mode bindings, return nil. If the first binding is a
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213 non-prefix, all subsequent bindings will be omitted, since they would
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214 be ignored. Similarly, the list doesn't include non-prefix bindings
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215 that come after prefix bindings.
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216
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217 If optional argument ACCEPT-DEFAULT is non-nil, recognize default
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218 bindings; see the description of `lookup-key' for more details about this."
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219 (let ((tail minor-mode-map-alist)
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220 a s v)
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221 (while tail
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222 (setq a (car tail)
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223 tail (cdr tail))
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224 (and (consp a)
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225 (symbolp (setq s (car a)))
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226 (boundp s)
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227 (symbol-value s)
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228 ;; indirect-function deals with autoloadable keymaps
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229 (setq v (indirect-function (cdr a)))
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230 (setq v (lookup-key v key accept-default))
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231 ;; Terminate loop, with v set to non-nil value
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232 (setq tail nil)))
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233 v))
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234
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235
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236 (defun current-minor-mode-maps ()
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237 "Return a list of keymaps for the minor modes of the current buffer."
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238 (let ((l '())
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239 (tail minor-mode-map-alist)
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240 a s v)
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241 (while tail
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242 (setq a (car tail)
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243 tail (cdr tail))
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244 (and (consp a)
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245 (symbolp (setq s (car a)))
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246 (boundp s)
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247 (symbol-value s)
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248 ;; indirect-function deals with autoloadable keymaps
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249 (setq v (indirect-function (cdr a)))
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250 (setq l (cons v l))))
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251 (nreverse l)))
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252
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253
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254 ;;#### What a crock
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255 (defun define-prefix-command (name &optional mapvar)
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256 "Define COMMAND as a prefix command.
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257 A new sparse keymap is stored as COMMAND's function definition.
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258 If second optional argument MAPVAR is not specified,
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259 COMMAND's value (as well as its function definition) is set to the keymap.
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260 If a second optional argument MAPVAR is given and is not `t',
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261 the map is stored as its value.
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262 Regardless of MAPVAR, COMMAND's function-value is always set to the keymap."
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263 (let ((map (make-sparse-keymap name)))
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264 (fset name map)
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265 (cond ((not mapvar)
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266 (set name map))
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267 ((eq mapvar 't)
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268 )
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269 (t
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270 (set mapvar map)))
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271 name))
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272
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273
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274 ;;; Converting vectors of events to a read-equivalent form.
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275 ;;; This is used both by call-interactively (for the command history)
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276 ;;; and by macros.el (for saving keyboard macros to a file).
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277
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278 ;; #### why does (events-to-keys [backspace]) return "\C-h"?
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279 ;; BTW, this function is a mess, and macros.el does *not* use it, in
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280 ;; spite of the above comment. `format-kbd-macro' is used to save
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281 ;; keyboard macros to a file.
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282 (defun events-to-keys (events &optional no-mice)
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283 "Given a vector of event objects, returns a vector of key descriptors,
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284 or a string (if they all fit in the ASCII range).
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285 Optional arg NO-MICE means that button events are not allowed."
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286 (if (and events (symbolp events)) (setq events (vector events)))
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287 (cond ((stringp events)
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288 events)
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289 ((not (vectorp events))
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290 (signal 'wrong-type-argument (list 'vectorp events)))
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291 ((let* ((length (length events))
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292 (string (make-string length 0))
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293 c ce
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294 (i 0))
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295 (while (< i length)
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296 (setq ce (aref events i))
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297 (or (eventp ce) (setq ce (character-to-event ce)))
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298 ;; Normalize `c' to `?c' and `(control k)' to `?\C-k'
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299 ;; By passing t for the `allow-meta' arg we could get kbd macros
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300 ;; with meta in them to translate to the string form instead of
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301 ;; the list/symbol form; but I expect that would cause confusion,
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302 ;; so let's use the list/symbol form whenever there's
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303 ;; any ambiguity.
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304 (setq c (event-to-character ce))
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305 (if (and c
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306 character-set-property
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307 (key-press-event-p ce))
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308 (cond ((symbolp (event-key ce))
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309 (if (get (event-key ce) character-set-property)
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310 ;; Don't use a string for `backspace' and `tab' to
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311 ;; avoid that unpleasant little ambiguity.
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312 (setq c nil)))
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313 ((and (= (event-modifier-bits ce) 1) ;control
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314 (integerp (event-key ce)))
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315 (let* ((te (character-to-event c)))
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316 (if (and (symbolp (event-key te))
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317 (get (event-key te) character-set-property))
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318 ;; Don't "normalize" (control i) to tab
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319 ;; to avoid the ambiguity in the other direction
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320 (setq c nil))
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321 (deallocate-event te)))))
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322 (if c
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323 (aset string i c)
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324 (setq i length string nil))
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325 (setq i (1+ i)))
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326 string))
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327 (t
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328 (let* ((length (length events))
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329 (new (copy-sequence events))
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330 event mods key
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331 (i 0))
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332 (while (< i length)
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333 (setq event (aref events i))
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334 (cond ((key-press-event-p event)
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335 (setq mods (event-modifiers event)
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336 key (event-key event))
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337 (if (numberp key)
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338 (setq key (intern (make-string 1 key))))
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339 (aset new i (if mods
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340 (nconc mods (cons key nil))
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341 key)))
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342 ((misc-user-event-p event)
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343 (aset new i (list 'menu-selection
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344 (event-function event)
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345 (event-object event))))
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346 ((or (button-press-event-p event)
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347 (button-release-event-p event))
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348 (if no-mice
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349 (error
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350 "Mouse events can't be saved in keyboard macros."))
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351 (setq mods (event-modifiers event)
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352 key (intern (format "button%d%s"
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353 (event-button event)
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354 (if (button-release-event-p event)
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355 "up" ""))))
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356 (aset new i (if mods
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357 (nconc mods (cons key nil))
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358 key)))
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359 ((or (and event (symbolp event))
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360 (and (consp event) (symbolp (car event))))
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361 (aset new i event))
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362 (t
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363 (signal 'wrong-type-argument (list 'eventp event))))
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364 (setq i (1+ i)))
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365 new))))
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366
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367
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368 (defun next-key-event ()
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369 "Return the next available keyboard event."
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370 (let (event)
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371 (while (not (key-press-event-p (setq event (next-command-event))))
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372 (dispatch-event event))
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373 event))
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374
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375 (defun key-sequence-list-description (keys)
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376 "Convert a key sequence KEYS to the full [(modifiers... key)...] form.
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502
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377 Argument KEYS can be in any form accepted by `define-key' function.
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378 The output is always in a canonical form, meaning you can use this
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379 function to determine if two key sequence specifications are equivalent
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380 by comparing the respective outputs of this function using `equal'."
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428
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381 (let ((vec
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502
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382 (cond ((vectorp keys)
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383 keys)
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384 ((stringp keys)
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385 (vconcat keys))
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386 (t
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387 (vector keys)))))
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388 (flet ((event-to-list (ev)
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389 (append (event-modifiers ev) (list (event-key ev)))))
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390 (mapvector
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391 #'(lambda (key)
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392 (let* ((full-key
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393 (cond ((key-press-event-p key)
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394 (event-to-list key))
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395 ((characterp key)
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396 (event-to-list (character-to-event key)))
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397 ((listp key)
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398 (copy-sequence key))
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399 (t
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400 (list key))))
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401 (keysym (car (last full-key))))
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402 (if (characterp keysym)
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403 (setcar (last full-key) (intern (char-to-string keysym))))
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404 full-key))
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405 vec))))
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428
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406
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407
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408 ;;; Support keyboard commands to turn on various modifiers.
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409
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410 ;;; These functions -- which are not commands -- each add one modifier
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411 ;;; to the following event.
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412
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413 (defun event-apply-alt-modifier (ignore-prompt)
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414 (event-apply-modifier 'alt))
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415 (defun event-apply-super-modifier (ignore-prompt)
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416 (event-apply-modifier 'super))
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417 (defun event-apply-hyper-modifier (ignore-prompt)
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418 (event-apply-modifier 'hyper))
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419 (defun event-apply-shift-modifier (ignore-prompt)
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420 (event-apply-modifier 'shift))
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421 (defun event-apply-control-modifier (ignore-prompt)
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422 (event-apply-modifier 'control))
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423 (defun event-apply-meta-modifier (ignore-prompt)
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424 (event-apply-modifier 'meta))
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425
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426 ;;; #### `key-translate-map' is ignored for now.
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427 (defun event-apply-modifier (symbol)
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428 "Return the next key event, with a modifier flag applied.
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429 SYMBOL is the name of this modifier, as a symbol.
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430 `function-key-map' is scanned for prefix bindings."
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431 (let (events binding)
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432 ;; read keystrokes scanning `function-key-map'
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433 (while (keymapp
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434 (setq binding
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435 (lookup-key
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436 function-key-map
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437 (vconcat
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438 (setq events
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439 (append events (list (next-key-event)))))))))
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440 (if binding ; found a binding
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441 (progn
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442 ;; allow for several modifiers
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443 (if (and (symbolp binding) (fboundp binding))
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444 (setq binding (funcall binding nil)))
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445 (setq events (append binding nil))
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446 ;; put remaining keystrokes back into input queue
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447 (setq unread-command-events
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448 (mapcar 'character-to-event (cdr events))))
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449 (setq unread-command-events (cdr events)))
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450 ;; add a modifier SYMBOL to the first keystroke or event
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451 (vector
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452 (append (list symbol)
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453 (delq symbol
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454 (aref (key-sequence-list-description (car events)) 0))))))
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455
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456 (defun synthesize-keysym (ignore-prompt)
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457 "Read a sequence of keys, and returned the corresponding key symbol.
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458 The characters must be from the [-_a-zA-Z0-9]. Reading is terminated
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459 by RET (which is discarded)."
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460 (let ((continuep t)
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461 event char list)
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462 (while continuep
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463 (setq event (next-key-event))
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464 (cond ((and (setq char (event-to-character event))
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465 (or (memq char '(?- ?_))
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466 (eq ?w (char-syntax char (standard-syntax-table)))))
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467 ;; Advance a character.
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468 (push char list))
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469 ((or (memq char '(?\r ?\n))
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470 (memq (event-key event) '(return newline)))
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471 ;; Legal termination.
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472 (setq continuep nil))
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473 (char
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474 ;; Illegal character.
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475 (error "Illegal character in keysym: %c" char))
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476 (t
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477 ;; Illegal event.
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478 (error "Event has no character equivalent: %s" event))))
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479 (vector (intern (concat "" (nreverse list))))))
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480
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481 ;; This looks dirty. The following code should maybe go to another
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482 ;; file, and `create-console-hook' should maybe default to nil.
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483 (add-hook
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484 'create-console-hook
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485 #'(lambda (console)
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486 (letf (((selected-console) console))
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487 (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
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488 (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
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489 (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
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490 (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
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491 (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
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492 (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
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493 (define-key function-key-map [?\C-x ?@ ?k] 'synthesize-keysym))))
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494
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495 ;;; keymap.el ends here
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