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1 @c -*-texinfo-*-
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2 @c This is part of the XEmacs Lisp Reference Manual.
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3 @c Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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4 @c Copyright (C) 1996 Ben Wing.
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5 @c See the file lispref.texi for copying conditions.
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6 @setfilename ../../info/keymaps.info
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7 @node Keymaps, Menus, Command Loop, Top
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8 @chapter Keymaps
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9 @cindex keymap
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10
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11 @c This section is largely different from the one in FSF Emacs.
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12
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13 The bindings between input events and commands are recorded in data
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14 structures called @dfn{keymaps}. Each binding in a keymap associates
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15 (or @dfn{binds}) an individual event type either with another keymap or
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16 with a command. When an event is bound to a keymap, that keymap is
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17 used to look up the next input event; this continues until a command
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18 is found. The whole process is called @dfn{key lookup}.
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19
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20 @menu
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21 * Keymap Terminology:: Definitions of terms pertaining to keymaps.
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22 * Format of Keymaps:: What a keymap looks like as a Lisp object.
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23 * Creating Keymaps:: Functions to create and copy keymaps.
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24 * Inheritance and Keymaps:: How one keymap can inherit the bindings
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25 of another keymap.
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26 * Key Sequences:: How to specify key sequences.
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27 * Prefix Keys:: Defining a key with a keymap as its definition.
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28 * Active Keymaps:: Each buffer has a local keymap
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29 to override the standard (global) bindings.
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30 A minor mode can also override them.
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31 * Key Lookup:: How extracting elements from keymaps works.
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32 * Functions for Key Lookup:: How to request key lookup.
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33 * Changing Key Bindings:: Redefining a key in a keymap.
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34 * Key Binding Commands:: Interactive interfaces for redefining keys.
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35 * Scanning Keymaps:: Looking through all keymaps, for printing help.
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36 * Other Keymap Functions:: Miscellaneous keymap functions.
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37 @end menu
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38
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39 @node Keymap Terminology
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40 @section Keymap Terminology
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41 @cindex key
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42 @cindex keystroke
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43 @cindex key binding
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44 @cindex binding of a key
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45 @cindex complete key
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46 @cindex undefined key
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47
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48 A @dfn{keymap} is a table mapping event types to definitions (which
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49 can be any Lisp objects, though only certain types are meaningful for
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50 execution by the command loop). Given an event (or an event type) and a
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51 keymap, XEmacs can get the event's definition. Events mapped in keymaps
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52 include keypresses, button presses, and button releases
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53 (@pxref{Events}).
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54
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55 A sequence of input events that form a unit is called a
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56 @dfn{key sequence}, or @dfn{key} for short. A sequence of one event
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57 is always a key sequence, and so are some multi-event sequences.
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58
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59 A keymap determines a binding or definition for any key sequence. If
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60 the key sequence is a single event, its binding is the definition of the
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61 event in the keymap. The binding of a key sequence of more than one
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62 event is found by an iterative process: the binding of the first event
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63 is found, and must be a keymap; then the second event's binding is found
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64 in that keymap, and so on until all the events in the key sequence are
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65 used up.
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66
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67 If the binding of a key sequence is a keymap, we call the key sequence
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68 a @dfn{prefix key}. Otherwise, we call it a @dfn{complete key} (because
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69 no more events can be added to it). If the binding is @code{nil},
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70 we call the key @dfn{undefined}. Examples of prefix keys are @kbd{C-c},
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71 @kbd{C-x}, and @kbd{C-x 4}. Examples of defined complete keys are
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72 @kbd{X}, @key{RET}, and @kbd{C-x 4 C-f}. Examples of undefined complete
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73 keys are @kbd{C-x C-g}, and @kbd{C-c 3}. @xref{Prefix Keys}, for more
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74 details.
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75
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76 The rule for finding the binding of a key sequence assumes that the
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77 intermediate bindings (found for the events before the last) are all
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78 keymaps; if this is not so, the sequence of events does not form a
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79 unit---it is not really a key sequence. In other words, removing one or
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80 more events from the end of any valid key must always yield a prefix
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81 key. For example, @kbd{C-f C-n} is not a key; @kbd{C-f} is not a prefix
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82 key, so a longer sequence starting with @kbd{C-f} cannot be a key.
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83
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84 Note that the set of possible multi-event key sequences depends on the
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85 bindings for prefix keys; therefore, it can be different for different
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86 keymaps, and can change when bindings are changed. However, a one-event
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87 sequence is always a key sequence, because it does not depend on any
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88 prefix keys for its well-formedness.
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89
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90 At any time, several primary keymaps are @dfn{active}---that is, in
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91 use for finding key bindings. These are the @dfn{global map}, which is
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92 shared by all buffers; the @dfn{local keymap}, which is usually
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93 associated with a specific major mode; and zero or more @dfn{minor mode
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94 keymaps}, which belong to currently enabled minor modes. (Not all minor
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95 modes have keymaps.) The local keymap bindings shadow (i.e., take
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96 precedence over) the corresponding global bindings. The minor mode
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97 keymaps shadow both local and global keymaps. @xref{Active Keymaps},
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98 for details.
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99
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100 @node Format of Keymaps
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101 @section Format of Keymaps
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102 @cindex format of keymaps
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103 @cindex keymap format
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104
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105 A keymap is a primitive type that associates events with their
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106 bindings. Note that this is different from Emacs 18 and FSF Emacs,
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107 where keymaps are lists.
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108
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109 @defun keymapp object
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110 This function returns @code{t} if @var{object} is a keymap, @code{nil}
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111 otherwise.
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112 @end defun
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113
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114 @node Creating Keymaps
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115 @section Creating Keymaps
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116 @cindex creating keymaps
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117
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118 Here we describe the functions for creating keymaps.
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119
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120 @defun make-keymap &optional name
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121 This function constructs and returns a new keymap object. All entries
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122 in it are @code{nil}, meaning ``command undefined''.
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123
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124 Optional argument @var{name} specifies a name to assign to the keymap,
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125 as in @code{set-keymap-name}. This name is only a debugging
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126 convenience; it is not used except when printing the keymap.
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127 @end defun
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128
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129 @defun make-sparse-keymap &optional name
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130 This function constructs and returns a new keymap object. All entries
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131 in it are @code{nil}, meaning ``command undefined''. The only
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132 difference between this function and @code{make-keymap} is that this
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133 function returns a ``smaller'' keymap (one that is expected to contain
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134 fewer entries). As keymaps dynamically resize, the distinction is not
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135 great.
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136
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137 Optional argument @var{name} specifies a name to assign to the keymap,
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138 as in @code{set-keymap-name}. This name is only a debugging
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139 convenience; it is not used except when printing the keymap.
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140 @end defun
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141
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142 @defun set-keymap-name keymap new-name
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143 This function assigns a ``name'' to a keymap. The name is only a
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144 debugging convenience; it is not used except when printing the keymap.
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145 @end defun
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146
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147 @defun keymap-name keymap
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148 This function returns the ``name'' of a keymap, as assigned using
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149 @code{set-keymap-name}.
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150 @end defun
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151
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152 @defun copy-keymap keymap
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153 This function returns a copy of @var{keymap}. Any keymaps that
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154 appear directly as bindings in @var{keymap} are also copied recursively,
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155 and so on to any number of levels. However, recursive copying does not
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156 take place when the definition of a character is a symbol whose function
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157 definition is a keymap; the same symbol appears in the new copy.
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158
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159 @example
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160 @group
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161 (setq map (copy-keymap (current-local-map)))
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162 @result{} #<keymap 3 entries 0x21f80>
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163 @end group
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164
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165 @group
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166 (eq map (current-local-map))
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167 @result{} nil
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168 @end group
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169 @ignore @c Doesn't work!
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170 @group
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171 (equal map (current-local-map))
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172 @result{} t
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173 @end group
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174 @end ignore
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175 @end example
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176 @end defun
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177
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178 @node Inheritance and Keymaps
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179 @section Inheritance and Keymaps
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180 @cindex keymap inheritance
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181 @cindex inheriting a keymap's bindings
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182 @cindex keymap parent
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183 @cindex parent of a keymap
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184
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185 A keymap can inherit the bindings of other keymaps. The other
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186 keymaps are called the keymap's @dfn{parents}, and are set with
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187 @code{set-keymap-parents}. When searching for a binding for a key
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188 sequence in a particular keymap, that keymap itself will first be
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189 searched; then, if no binding was found in the map and it has parents,
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190 the first parent keymap will be searched; then that keymap's parent will
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191 be searched, and so on, until either a binding for the key sequence is
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192 found, or a keymap without a parent is encountered. At this point,
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193 the search will continue with the next parent of the most recently
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194 encountered keymap that has another parent, etc. Essentially, a
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195 depth-first search of all the ancestors of the keymap is conducted.
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196
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197 @code{(current-global-map)} is the default parent of all keymaps.
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198
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199 @defun set-keymap-parents keymap parents
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200 This function sets the parent keymaps of @var{keymap} to the list
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201 @var{parents}.
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202
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203 If you change the bindings in one of the keymaps in @var{parents} using
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204 @code{define-key} or other key-binding functions, these changes are
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205 visible in @var{keymap} unless shadowed by bindings in that map or in
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206 earlier-searched ancestors. The converse is not true: if you use
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207 @code{define-key} to change @var{keymap}, that affects the bindings in
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208 that map, but has no effect on any of the keymaps in @var{parents}.
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209 @end defun
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210
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211 @defun keymap-parents keymap
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212 This function returns the list of parent keymaps of @var{keymap}, or
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213 @code{nil} if @var{keymap} has no parents.
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214 @end defun
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215
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216 As an alternative to specifying a parent, you can also specify a
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217 @dfn{default binding} that is used whenever a key is not otherwise bound
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218 in the keymap. This is useful for terminal emulators, for example,
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219 which may want to trap all keystrokes and pass them on in some modified
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220 format. Note that if you specify a default binding for a keymap,
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221 neither the keymap's parents nor the current global map are searched for
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222 key bindings.
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223
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224 @defun set-keymap-default-binding keymap command
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225 This function sets the default binding of @var{keymap} to @var{command},
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226 or @code{nil} if no default is desired.
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227 @end defun
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228
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229 @defun keymap-default-binding keymap
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230 This function returns the default binding of @var{keymap}, or @code{nil}
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231 if it has none.
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232 @end defun
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233
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234 @node Key Sequences
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235 @section Key Sequences
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236 @cindex key sequences
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237
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238 Contrary to popular belief, the world is not @sc{ASCII}. When running
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239 under a window manager, XEmacs can tell the difference between, for
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240 example, the keystrokes @kbd{control-h}, @kbd{control-shift-h}, and
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241 @kbd{backspace}. You can, in fact, bind different commands to each of
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242 these.
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243
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244 A @dfn{key sequence} is a set of keystrokes. A @dfn{keystroke} is a
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245 keysym and some set of modifiers (such as @key{CONTROL} and @key{META}).
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246 A @dfn{keysym} is what is printed on the keys on your keyboard.
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247
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248 A keysym may be represented by a symbol, or (if and only if it is
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249 equivalent to an @sc{ASCII} character in the range 32 - 255) by a
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250 character or its equivalent @sc{ASCII} code. The @kbd{A} key may be
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251 represented by the symbol @code{A}, the character @code{?A}, or by the
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252 number 65. The @kbd{break} key may be represented only by the symbol
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253 @code{break}.
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254
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255 A keystroke may be represented by a list: the last element of the list
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256 is the key (a symbol, character, or number, as above) and the preceding
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257 elements are the symbolic names of modifier keys (@key{CONTROL},
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258 @key{META}, @key{SUPER}, @key{HYPER}, @key{ALT}, and @key{SHIFT}).
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259 Thus, the sequence @kbd{control-b} is represented by the forms
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260 @code{(control b)}, @code{(control ?b)}, and @code{(control 98)}. A
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261 keystroke may also be represented by an event object, as returned by the
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262 @code{next-command-event} and @code{read-key-sequence} functions.
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263
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264 Note that in this context, the keystroke @kbd{control-b} is @emph{not}
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265 represented by the number 2 (the @sc{ASCII} code for @samp{^B}) or the
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266 character @code{?\^B}. See below.
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267
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268 The @key{SHIFT} modifier is somewhat of a special case. You should
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269 not (and cannot) use @code{(meta shift a)} to mean @code{(meta A)},
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270 since for characters that have @sc{ASCII} equivalents, the state of the
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271 shift key is implicit in the keysym (@samp{a} vs. @samp{A}). You also
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272 cannot say @code{(shift =)} to mean @code{+}, as that sort of thing
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273 varies from keyboard to keyboard. The @key{SHIFT} modifier is for use
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274 only with characters that do not have a second keysym on the same key,
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275 such as @code{backspace} and @code{tab}.
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276
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277 A key sequence is a vector of keystrokes. As a degenerate case,
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278 elements of this vector may also be keysyms if they have no modifiers.
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279 That is, the @kbd{A} keystroke is represented by all of these forms:
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280
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281 @example
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282 A ?A 65 (A) (?A) (65)
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283 [A] [?A] [65] [(A)] [(?A)] [(65)]
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284 @end example
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285
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286 the @kbd{control-a} keystroke is represented by these forms:
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287
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288 @example
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289 (control A) (control ?A) (control 65)
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290 [(control A)] [(control ?A)] [(control 65)]
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291 @end example
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292
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293 the key sequence @kbd{control-c control-a} is represented by these
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294 forms:
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295
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296 @example
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297 [(control c) (control a)] [(control ?c) (control ?a)]
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298 [(control 99) (control 65)] etc.
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299 @end example
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300
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301 Mouse button clicks work just like keypresses: @code{(control
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302 button1)} means pressing the left mouse button while holding down the
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303 control key. @code{[(control c) (shift button3)]} means
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304 @kbd{control-c}, hold @key{SHIFT}, click right.
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305
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306 Commands may be bound to the mouse-button up-stroke rather than the
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307 down-stroke as well. @code{button1} means the down-stroke, and
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308 @code{button1up} means the up-stroke. Different commands may be bound
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309 to the up and down strokes, though that is probably not what you want,
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310 so be careful.
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311
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312 For backward compatibility, a key sequence may also be represented by
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313 a string. In this case, it represents the key sequence(s) that would
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314 produce that sequence of @sc{ASCII} characters in a purely @sc{ASCII}
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315 world. For example, a string containing the @sc{ASCII} backspace
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316 character, @code{"\^H"}, would represent two key sequences:
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317 @code{(control h)} and @code{backspace}. Binding a command to this will
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318 actually bind both of those key sequences. Likewise for the following
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319 pairs:
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320
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321 @example
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322 control h backspace
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323 control i tab
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324 control m return
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325 control j linefeed
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326 control [ escape
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327 control @@ control space
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328 @end example
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329
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330 After binding a command to two key sequences with a form like
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331
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332 @example
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333 (define-key global-map "\^X\^I" 'command-1)
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334 @end example
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335
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336 @noindent
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337 it is possible to redefine only one of those sequences like so:
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338
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339 @example
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340 (define-key global-map [(control x) (control i)] 'command-2)
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341 (define-key global-map [(control x) tab] 'command-3)
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342 @end example
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343
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344 Of course, all of this applies only when running under a window
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345 system. If you're talking to XEmacs through a @sc{TTY} connection, you
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346 don't get any of these features.
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347
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348 @defun event-matches-key-specifier-p event key-specifier
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349 This function returns non-@code{nil} if @var{event} matches
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350 @var{key-specifier}, which can be any valid form representing a key
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351 sequence. This can be useful, e.g., to determine if the user pressed
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352 @code{help-char} or @code{quit-char}.
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353 @end defun
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354
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355 @node Prefix Keys
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356 @section Prefix Keys
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357 @cindex prefix key
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358
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359 A @dfn{prefix key} has an associated keymap that defines what to do
|
|
|
360 with key sequences that start with the prefix key. For example,
|
|
|
361 @kbd{C-x} is a prefix key, and it uses a keymap that is also stored in
|
|
|
362 the variable @code{ctl-x-map}. Here is a list of the standard prefix
|
|
|
363 keys of XEmacs and their keymaps:
|
|
|
364
|
|
|
365 @itemize @bullet
|
|
|
366 @item
|
|
|
367 @cindex @kbd{C-h}
|
|
|
368 @code{help-map} is used for events that follow @kbd{C-h}.
|
|
|
369
|
|
|
370 @item
|
|
|
371 @cindex @kbd{C-c}
|
|
|
372 @vindex mode-specific-map
|
|
|
373 @code{mode-specific-map} is for events that follow @kbd{C-c}. This
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|
|
374 map is not actually mode specific; its name was chosen to be informative
|
|
|
375 for the user in @kbd{C-h b} (@code{display-bindings}), where it
|
|
|
376 describes the main use of the @kbd{C-c} prefix key.
|
|
|
377
|
|
|
378 @item
|
|
|
379 @cindex @kbd{C-x}
|
|
|
380 @vindex ctl-x-map
|
|
|
381 @findex Control-X-prefix
|
|
|
382 @code{ctl-x-map} is the map used for events that follow @kbd{C-x}. This
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|
|
383 map is also the function definition of @code{Control-X-prefix}.
|
|
|
384
|
|
|
385 @item
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|
|
386 @cindex @kbd{C-x 4}
|
|
|
387 @vindex ctl-x-4-map
|
|
|
388 @code{ctl-x-4-map} is used for events that follow @kbd{C-x 4}.
|
|
|
389
|
|
|
390 @c Emacs 19 feature
|
|
|
391 @item
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|
|
392 @cindex @kbd{C-x 5}
|
|
|
393 @vindex ctl-x-5-map
|
|
|
394 @code{ctl-x-5-map} is used for events that follow @kbd{C-x 5}.
|
|
|
395
|
|
|
396 @c Emacs 19 feature
|
|
|
397 @item
|
|
|
398 @cindex @kbd{C-x n}
|
|
|
399 @cindex @kbd{C-x r}
|
|
|
400 @cindex @kbd{C-x a}
|
|
|
401 The prefix keys @kbd{C-x n}, @kbd{C-x r} and @kbd{C-x a} use keymaps
|
|
|
402 that have no special name.
|
|
|
403
|
|
|
404 @item
|
|
|
405 @vindex esc-map
|
|
|
406 @findex ESC-prefix
|
|
|
407 @code{esc-map} is an evil hack that is present for compatibility
|
|
|
408 purposes with Emacs 18. Defining a key in @code{esc-map} is equivalent
|
|
|
409 to defining the same key in @code{global-map} but with the @key{META}
|
|
|
410 prefix added. You should @emph{not} use this in your code. (This map is
|
|
|
411 also the function definition of @code{ESC-prefix}.)
|
|
|
412 @end itemize
|
|
|
413
|
|
|
414 The binding of a prefix key is the keymap to use for looking up the
|
|
|
415 events that follow the prefix key. (It may instead be a symbol whose
|
|
|
416 function definition is a keymap. The effect is the same, but the symbol
|
|
|
417 serves as a name for the prefix key.) Thus, the binding of @kbd{C-x} is
|
|
|
418 the symbol @code{Control-X-prefix}, whose function definition is the
|
|
|
419 keymap for @kbd{C-x} commands. (The same keymap is also the value of
|
|
|
420 @code{ctl-x-map}.)
|
|
|
421
|
|
|
422 Prefix key definitions can appear in any active keymap. The
|
|
|
423 definitions of @kbd{C-c}, @kbd{C-x}, @kbd{C-h} and @key{ESC} as prefix
|
|
|
424 keys appear in the global map, so these prefix keys are always
|
|
|
425 available. Major and minor modes can redefine a key as a prefix by
|
|
|
426 putting a prefix key definition for it in the local map or the minor
|
|
|
427 mode's map. @xref{Active Keymaps}.
|
|
|
428
|
|
|
429 If a key is defined as a prefix in more than one active map, then its
|
|
|
430 various definitions are in effect merged: the commands defined in the
|
|
|
431 minor mode keymaps come first, followed by those in the local map's
|
|
|
432 prefix definition, and then by those from the global map.
|
|
|
433
|
|
|
434 In the following example, we make @kbd{C-p} a prefix key in the local
|
|
|
435 keymap, in such a way that @kbd{C-p} is identical to @kbd{C-x}. Then
|
|
|
436 the binding for @kbd{C-p C-f} is the function @code{find-file}, just
|
|
|
437 like @kbd{C-x C-f}. The key sequence @kbd{C-p 6} is not found in any
|
|
|
438 active keymap.
|
|
|
439
|
|
|
440 @example
|
|
|
441 @group
|
|
|
442 (use-local-map (make-sparse-keymap))
|
|
|
443 @result{} nil
|
|
|
444 @end group
|
|
|
445 @group
|
|
|
446 (local-set-key "\C-p" ctl-x-map)
|
|
|
447 @result{} nil
|
|
|
448 @end group
|
|
|
449 @group
|
|
|
450 (key-binding "\C-p\C-f")
|
|
|
451 @result{} find-file
|
|
|
452 @end group
|
|
|
453
|
|
|
454 @group
|
|
|
455 (key-binding "\C-p6")
|
|
|
456 @result{} nil
|
|
|
457 @end group
|
|
|
458 @end example
|
|
|
459
|
|
|
460 @defun define-prefix-command symbol &optional mapvar
|
|
|
461 @cindex prefix command
|
|
|
462 This function defines @var{symbol} as a prefix command: it creates a
|
|
|
463 keymap and stores it as @var{symbol}'s function definition.
|
|
|
464 Storing the symbol as the binding of a key makes the key a prefix key
|
|
|
465 that has a name. If optional argument @var{mapvar} is not specified,
|
|
|
466 it also sets @var{symbol} as a variable, to have the keymap as its
|
|
|
467 value. (If @var{mapvar} is given and is not @code{t}, its value is
|
|
|
468 stored as the value of @var{symbol}.) The function returns @var{symbol}.
|
|
|
469
|
|
|
470 In Emacs version 18, only the function definition of @var{symbol} was
|
|
|
471 set, not the value as a variable.
|
|
|
472 @end defun
|
|
|
473
|
|
|
474 @node Active Keymaps
|
|
|
475 @section Active Keymaps
|
|
|
476 @cindex active keymap
|
|
|
477 @cindex global keymap
|
|
|
478 @cindex local keymap
|
|
|
479
|
|
|
480 XEmacs normally contains many keymaps; at any given time, just a few of
|
|
|
481 them are @dfn{active} in that they participate in the interpretation
|
|
|
482 of user input. These are the global keymap, the current buffer's
|
|
|
483 local keymap, and the keymaps of any enabled minor modes.
|
|
|
484
|
|
|
485 The @dfn{global keymap} holds the bindings of keys that are defined
|
|
|
486 regardless of the current buffer, such as @kbd{C-f}. The variable
|
|
|
487 @code{global-map} holds this keymap, which is always active.
|
|
|
488
|
|
|
489 Each buffer may have another keymap, its @dfn{local keymap}, which may
|
|
|
490 contain new or overriding definitions for keys. The current buffer's
|
|
|
491 local keymap is always active except when @code{overriding-local-map} or
|
|
|
492 @code{overriding-terminal-local-map} overrides it. Extents and text
|
|
|
493 properties can specify an alternative local map for certain parts of the
|
|
|
494 buffer; see @ref{Extents and Events}.
|
|
|
495
|
|
|
496 Each minor mode may have a keymap; if it does, the keymap is active
|
|
|
497 when the minor mode is enabled.
|
|
|
498
|
|
|
499 The variable @code{overriding-local-map} and
|
|
|
500 @code{overriding-terminal-local-map}, if non-@code{nil}, specify other
|
|
|
501 local keymaps that override the buffer's local map and all the minor
|
|
|
502 mode keymaps.
|
|
|
503
|
|
|
504 All the active keymaps are used together to determine what command to
|
|
|
505 execute when a key is entered. XEmacs searches these maps one by one, in
|
|
|
506 order of decreasing precedence, until it finds a binding in one of the maps.
|
|
|
507
|
|
|
508 More specifically:
|
|
|
509
|
|
|
510 For key-presses, the order of keymaps searched is:
|
|
|
511
|
|
|
512 @itemize @bullet
|
|
|
513 @item
|
|
|
514 the @code{keymap} property of any extent(s) or text properties at point;
|
|
|
515 @item
|
|
|
516 any applicable minor-mode maps;
|
|
|
517 @item
|
|
|
518 the current local map of the current buffer;
|
|
|
519 @item
|
|
|
520 the current global map.
|
|
|
521 @end itemize
|
|
|
522
|
|
|
523 For mouse-clicks, the order of keymaps searched is:
|
|
|
524
|
|
|
525 @itemize @bullet
|
|
|
526 @item
|
|
|
527 the current local map of the @code{mouse-grabbed-buffer} if any;
|
|
|
528 @item
|
|
|
529 the @code{keymap} property of any extent(s) at the position of the click
|
|
|
530 (this includes modeline extents);
|
|
|
531 @item
|
|
|
532 the @code{modeline-map} of the buffer corresponding to the modeline
|
|
|
533 under the mouse (if the click happened over a modeline);
|
|
|
534 @item
|
|
|
535 the value of @code{toolbar-map} in the current buffer (if the click
|
|
|
536 happened over a toolbar);
|
|
|
537 @item
|
|
|
538 the current local map of the buffer under the mouse (does not
|
|
|
539 apply to toolbar clicks);
|
|
|
540 @item
|
|
|
541 any applicable minor-mode maps;
|
|
|
542 @item
|
|
|
543 the current global map.
|
|
|
544 @end itemize
|
|
|
545
|
|
|
546 Note that if @code{overriding-local-map} or
|
|
|
547 @code{overriding-terminal-local-map} is non-@code{nil}, @emph{only}
|
|
|
548 those two maps and the current global map are searched.
|
|
|
549
|
|
|
550 The procedure for searching a single keymap is called
|
|
|
551 @dfn{key lookup}; see @ref{Key Lookup}.
|
|
|
552
|
|
|
553 @cindex major mode keymap
|
|
|
554 Since every buffer that uses the same major mode normally uses the
|
|
|
555 same local keymap, you can think of the keymap as local to the mode. A
|
|
|
556 change to the local keymap of a buffer (using @code{local-set-key}, for
|
|
|
557 example) is seen also in the other buffers that share that keymap.
|
|
|
558
|
|
|
559 The local keymaps that are used for Lisp mode, C mode, and several
|
|
|
560 other major modes exist even if they have not yet been used. These
|
|
|
561 local maps are the values of the variables @code{lisp-mode-map},
|
|
|
562 @code{c-mode-map}, and so on. For most other modes, which are less
|
|
|
563 frequently used, the local keymap is constructed only when the mode is
|
|
|
564 used for the first time in a session.
|
|
|
565
|
|
|
566 The minibuffer has local keymaps, too; they contain various completion
|
|
|
567 and exit commands. @xref{Intro to Minibuffers}.
|
|
|
568
|
|
|
569 @xref{Standard Keymaps}, for a list of standard keymaps.
|
|
|
570
|
|
|
571 @defun current-keymaps &optional event-or-keys
|
|
|
572 This function returns a list of the current keymaps that will be
|
|
|
573 searched for bindings. This lists keymaps such as the current local map
|
|
|
574 and the minor-mode maps, but does not list the parents of those keymaps.
|
|
|
575 @var{event-or-keys} controls which keymaps will be listed. If
|
|
|
576 @var{event-or-keys} is a mouse event (or a vector whose last element is
|
|
|
577 a mouse event), the keymaps for that mouse event will be listed.
|
|
|
578 Otherwise, the keymaps for key presses will be listed.
|
|
|
579 @end defun
|
|
|
580
|
|
|
581 @defvar global-map
|
|
|
582 This variable contains the default global keymap that maps XEmacs
|
|
|
583 keyboard input to commands. The global keymap is normally this keymap.
|
|
|
584 The default global keymap is a full keymap that binds
|
|
|
585 @code{self-insert-command} to all of the printing characters.
|
|
|
586
|
|
|
587 It is normal practice to change the bindings in the global map, but you
|
|
|
588 should not assign this variable any value other than the keymap it starts
|
|
|
589 out with.
|
|
|
590 @end defvar
|
|
|
591
|
|
|
592 @defun current-global-map
|
|
|
593 This function returns the current global keymap. This is the
|
|
|
594 same as the value of @code{global-map} unless you change one or the
|
|
|
595 other.
|
|
|
596
|
|
|
597 @example
|
|
|
598 @group
|
|
|
599 (current-global-map)
|
|
|
600 @result{} #<keymap global-map 639 entries 0x221>
|
|
|
601 @end group
|
|
|
602 @end example
|
|
|
603 @end defun
|
|
|
604
|
|
|
605 @defun current-local-map
|
|
|
606 This function returns the current buffer's local keymap, or @code{nil}
|
|
|
607 if it has none. In the following example, the keymap for the
|
|
|
608 @samp{*scratch*} buffer (using Lisp Interaction mode) has a number
|
|
|
609 of entries, including one prefix key, @kbd{C-x}.
|
|
|
610
|
|
|
611 @example
|
|
|
612 @group
|
|
|
613 (current-local-map)
|
|
|
614 @result{} #<keymap lisp-interaction-mode-map 5 entries 0x558>
|
|
|
615 (describe-bindings-internal (current-local-map))
|
|
|
616 @result{} ; @r{Inserted into the buffer:}
|
|
|
617 backspace backward-delete-char-untabify
|
|
|
618 linefeed eval-print-last-sexp
|
|
|
619 delete delete-char
|
|
|
620 C-j eval-print-last-sexp
|
|
|
621 C-x << Prefix Command >>
|
|
|
622 M-tab lisp-complete-symbol
|
|
|
623 M-; lisp-indent-for-comment
|
|
|
624 M-C-i lisp-complete-symbol
|
|
|
625 M-C-q indent-sexp
|
|
|
626 M-C-x eval-defun
|
|
|
627 Alt-backspace backward-kill-sexp
|
|
|
628 Alt-delete kill-sexp
|
|
|
629 @end group
|
|
|
630
|
|
|
631 @group
|
|
|
632 C-x x edebug-defun
|
|
|
633 @end group
|
|
|
634 @end example
|
|
|
635 @end defun
|
|
|
636
|
|
|
637 @defun current-minor-mode-maps
|
|
|
638 This function returns a list of the keymaps of currently enabled minor modes.
|
|
|
639 @end defun
|
|
|
640
|
|
|
641 @defun use-global-map keymap
|
|
|
642 This function makes @var{keymap} the new current global keymap. It
|
|
|
643 returns @code{nil}.
|
|
|
644
|
|
|
645 It is very unusual to change the global keymap.
|
|
|
646 @end defun
|
|
|
647
|
|
|
648 @defun use-local-map keymap &optional buffer
|
|
|
649 This function makes @var{keymap} the new local keymap of @var{buffer}.
|
|
|
650 @var{buffer} defaults to the current buffer. If @var{keymap} is
|
|
|
651 @code{nil}, then the buffer has no local keymap. @code{use-local-map}
|
|
|
652 returns @code{nil}. Most major mode commands use this function.
|
|
|
653 @end defun
|
|
|
654
|
|
|
655 @c Emacs 19 feature
|
|
|
656 @defvar minor-mode-map-alist
|
|
|
657 This variable is an alist describing keymaps that may or may not be
|
|
|
658 active according to the values of certain variables. Its elements look
|
|
|
659 like this:
|
|
|
660
|
|
|
661 @example
|
|
|
662 (@var{variable} . @var{keymap})
|
|
|
663 @end example
|
|
|
664
|
|
|
665 The keymap @var{keymap} is active whenever @var{variable} has a
|
|
|
666 non-@code{nil} value. Typically @var{variable} is the variable that
|
|
|
667 enables or disables a minor mode. @xref{Keymaps and Minor Modes}.
|
|
|
668
|
|
|
669 Note that elements of @code{minor-mode-map-alist} do not have the same
|
|
|
670 structure as elements of @code{minor-mode-alist}. The map must be the
|
|
|
671 @sc{cdr} of the element; a list with the map as the second element will
|
|
|
672 not do.
|
|
|
673
|
|
|
674 What's more, the keymap itself must appear in the @sc{cdr}. It does not
|
|
|
675 work to store a variable in the @sc{cdr} and make the map the value of
|
|
|
676 that variable.
|
|
|
677
|
|
|
678 When more than one minor mode keymap is active, their order of priority
|
|
|
679 is the order of @code{minor-mode-map-alist}. But you should design
|
|
|
680 minor modes so that they don't interfere with each other. If you do
|
|
|
681 this properly, the order will not matter.
|
|
|
682
|
|
|
683 See also @code{minor-mode-key-binding}, above. See @ref{Keymaps and
|
|
|
684 Minor Modes}, for more information about minor modes.
|
|
|
685 @end defvar
|
|
|
686
|
|
|
687 @defvar modeline-map
|
|
|
688 This variable holds the keymap consulted for mouse-clicks on the
|
|
|
689 modeline of a window. This variable may be buffer-local; its value will
|
|
|
690 be looked up in the buffer of the window whose modeline was clicked
|
|
|
691 upon.
|
|
|
692 @end defvar
|
|
|
693
|
|
|
694 @defvar toolbar-map
|
|
|
695 This variable holds the keymap consulted for mouse-clicks over a
|
|
|
696 toolbar.
|
|
|
697 @end defvar
|
|
|
698
|
|
|
699 @defvar mouse-grabbed-buffer
|
|
|
700 If non-@code{nil}, a buffer which should be consulted first for all
|
|
|
701 mouse activity. When a mouse-click is processed, it will first be
|
|
|
702 looked up in the local-map of this buffer, and then through the normal
|
|
|
703 mechanism if there is no binding for that click. This buffer's value of
|
|
|
704 @code{mode-motion-hook} will be consulted instead of the
|
|
|
705 @code{mode-motion-hook} of the buffer of the window under the mouse.
|
|
|
706 You should @emph{bind} this, not set it.
|
|
|
707 @end defvar
|
|
|
708
|
|
|
709 @defvar overriding-local-map
|
|
|
710 If non-@code{nil}, this variable holds a keymap to use instead of the
|
|
|
711 buffer's local keymap and instead of all the minor mode keymaps. This
|
|
|
712 keymap, if any, overrides all other maps that would have been active,
|
|
|
713 except for the current global map.
|
|
|
714 @end defvar
|
|
|
715
|
|
|
716 @defvar overriding-terminal-local-map
|
|
|
717 If non-@code{nil}, this variable holds a keymap to use instead of the
|
|
|
718 buffer's local keymap and instead of all the minor mode keymaps, but for
|
|
|
719 the selected console only. (In other words, this variable is always
|
|
|
720 console-local; putting a keymap here only applies to keystrokes coming
|
|
|
721 from the selected console. @xref{Consoles and Devices}.) This keymap,
|
|
|
722 if any, overrides all other maps that would have been active, except for
|
|
|
723 the current global map.
|
|
|
724 @end defvar
|
|
|
725
|
|
|
726 @node Key Lookup
|
|
|
727 @section Key Lookup
|
|
|
728 @cindex key lookup
|
|
|
729 @cindex keymap entry
|
|
|
730
|
|
|
731 @dfn{Key lookup} is the process of finding the binding of a key
|
|
|
732 sequence from a given keymap. Actual execution of the binding is not
|
|
|
733 part of key lookup.
|
|
|
734
|
|
|
735 Key lookup uses just the event type of each event in the key
|
|
|
736 sequence; the rest of the event is ignored. In fact, a key sequence
|
|
|
737 used for key lookup may designate mouse events with just their types
|
|
|
738 (symbols) instead of with entire mouse events (lists). @xref{Events}.
|
|
|
739 Such a pseudo-key-sequence is insufficient for @code{command-execute},
|
|
|
740 but it is sufficient for looking up or rebinding a key.
|
|
|
741
|
|
|
742 When the key sequence consists of multiple events, key lookup
|
|
|
743 processes the events sequentially: the binding of the first event is
|
|
|
744 found, and must be a keymap; then the second event's binding is found in
|
|
|
745 that keymap, and so on until all the events in the key sequence are used
|
|
|
746 up. (The binding thus found for the last event may or may not be a
|
|
|
747 keymap.) Thus, the process of key lookup is defined in terms of a
|
|
|
748 simpler process for looking up a single event in a keymap. How that is
|
|
|
749 done depends on the type of object associated with the event in that
|
|
|
750 keymap.
|
|
|
751
|
|
|
752 Let's use the term @dfn{keymap entry} to describe the value found by
|
|
|
753 looking up an event type in a keymap. (This doesn't include the item
|
|
|
754 string and other extra elements in menu key bindings because
|
|
|
755 @code{lookup-key} and other key lookup functions don't include them in
|
|
|
756 the returned value.) While any Lisp object may be stored in a keymap as
|
|
|
757 a keymap entry, not all make sense for key lookup. Here is a list of
|
|
|
758 the meaningful kinds of keymap entries:
|
|
|
759
|
|
|
760 @table @asis
|
|
|
761 @item @code{nil}
|
|
|
762 @cindex @code{nil} in keymap
|
|
|
763 @code{nil} means that the events used so far in the lookup form an
|
|
|
764 undefined key. When a keymap fails to mention an event type at all, and
|
|
|
765 has no default binding, that is equivalent to a binding of @code{nil}
|
|
|
766 for that event type.
|
|
|
767
|
|
|
768 @item @var{keymap}
|
|
|
769 @cindex keymap in keymap
|
|
|
770 The events used so far in the lookup form a prefix key. The next
|
|
|
771 event of the key sequence is looked up in @var{keymap}.
|
|
|
772
|
|
|
773 @item @var{command}
|
|
|
774 @cindex command in keymap
|
|
|
775 The events used so far in the lookup form a complete key,
|
|
|
776 and @var{command} is its binding. @xref{What Is a Function}.
|
|
|
777
|
|
|
778 @item @var{array}
|
|
|
779 @cindex string in keymap
|
|
|
780 The array (either a string or a vector) is a keyboard macro. The events
|
|
|
781 used so far in the lookup form a complete key, and the array is its
|
|
|
782 binding. See @ref{Keyboard Macros}, for more information. (Note that
|
|
|
783 you cannot use a shortened form of a key sequence here, such as
|
|
|
784 @code{(control y)}; you must use the full form @code{[(control y)]}.
|
|
|
785 @xref{Key Sequences}.)
|
|
|
786
|
|
|
787 @item @var{list}
|
|
|
788 @cindex list in keymap
|
|
|
789 The meaning of a list depends on the types of the elements of the list.
|
|
|
790
|
|
|
791 @itemize @bullet
|
|
|
792 @item
|
|
|
793 @cindex @code{lambda} in keymap
|
|
|
794 If the @sc{car} of @var{list} is @code{lambda}, then the list is a
|
|
|
795 lambda expression. This is presumed to be a command, and is treated as
|
|
|
796 such (see above).
|
|
|
797
|
|
|
798 @item
|
|
|
799 If the @sc{car} of @var{list} is a keymap and the @sc{cdr} is an event
|
|
|
800 type, then this is an @dfn{indirect entry}:
|
|
|
801
|
|
|
802 @example
|
|
|
803 (@var{othermap} . @var{othertype})
|
|
|
804 @end example
|
|
|
805
|
|
|
806 When key lookup encounters an indirect entry, it looks up instead the
|
|
|
807 binding of @var{othertype} in @var{othermap} and uses that.
|
|
|
808
|
|
|
809 This feature permits you to define one key as an alias for another key.
|
|
|
810 For example, an entry whose @sc{car} is the keymap called @code{esc-map}
|
|
|
811 and whose @sc{cdr} is 32 (the code for @key{SPC}) means, ``Use the global
|
|
|
812 binding of @kbd{Meta-@key{SPC}}, whatever that may be.''
|
|
|
813 @end itemize
|
|
|
814
|
|
|
815 @item @var{symbol}
|
|
|
816 @cindex symbol in keymap
|
|
|
817 The function definition of @var{symbol} is used in place of
|
|
|
818 @var{symbol}. If that too is a symbol, then this process is repeated,
|
|
|
819 any number of times. Ultimately this should lead to an object that is
|
|
|
820 a keymap, a command or a keyboard macro. A list is allowed if it is a
|
|
|
821 keymap or a command, but indirect entries are not understood when found
|
|
|
822 via symbols.
|
|
|
823
|
|
|
824 Note that keymaps and keyboard macros (strings and vectors) are not
|
|
|
825 valid functions, so a symbol with a keymap, string, or vector as its
|
|
|
826 function definition is invalid as a function. It is, however, valid as
|
|
|
827 a key binding. If the definition is a keyboard macro, then the symbol
|
|
|
828 is also valid as an argument to @code{command-execute}
|
|
|
829 (@pxref{Interactive Call}).
|
|
|
830
|
|
|
831 @cindex @code{undefined} in keymap
|
|
|
832 The symbol @code{undefined} is worth special mention: it means to treat
|
|
|
833 the key as undefined. Strictly speaking, the key is defined, and its
|
|
|
834 binding is the command @code{undefined}; but that command does the same
|
|
|
835 thing that is done automatically for an undefined key: it rings the bell
|
|
|
836 (by calling @code{ding}) but does not signal an error.
|
|
|
837
|
|
|
838 @cindex preventing prefix key
|
|
|
839 @code{undefined} is used in local keymaps to override a global key
|
|
|
840 binding and make the key ``undefined'' locally. A local binding of
|
|
|
841 @code{nil} would fail to do this because it would not override the
|
|
|
842 global binding.
|
|
|
843
|
|
|
844 @item @var{anything else}
|
|
|
845 If any other type of object is found, the events used so far in the
|
|
|
846 lookup form a complete key, and the object is its binding, but the
|
|
|
847 binding is not executable as a command.
|
|
|
848 @end table
|
|
|
849
|
|
|
850 In short, a keymap entry may be a keymap, a command, a keyboard macro,
|
|
|
851 a symbol that leads to one of them, or an indirection or @code{nil}.
|
|
|
852
|
|
|
853 @node Functions for Key Lookup
|
|
|
854 @section Functions for Key Lookup
|
|
|
855
|
|
|
856 Here are the functions and variables pertaining to key lookup.
|
|
|
857
|
|
|
858 @defun lookup-key keymap key &optional accept-defaults
|
|
|
859 This function returns the definition of @var{key} in @var{keymap}. If
|
|
|
860 the string or vector @var{key} is not a valid key sequence according to
|
|
|
861 the prefix keys specified in @var{keymap} (which means it is ``too
|
|
|
862 long'' and has extra events at the end), then the value is a number, the
|
|
|
863 number of events at the front of @var{key} that compose a complete key.
|
|
|
864
|
|
|
865 @c Emacs 19 feature
|
|
|
866 If @var{accept-defaults} is non-@code{nil}, then @code{lookup-key}
|
|
|
867 considers default bindings as well as bindings for the specific events
|
|
|
868 in @var{key}. Otherwise, @code{lookup-key} reports only bindings for
|
|
|
869 the specific sequence @var{key}, ignoring default bindings except when
|
|
|
870 you explicitly ask about them.
|
|
|
871
|
|
|
872 All the other functions described in this chapter that look up keys use
|
|
|
873 @code{lookup-key}.
|
|
|
874
|
|
|
875 @example
|
|
|
876 @group
|
|
|
877 (lookup-key (current-global-map) "\C-x\C-f")
|
|
|
878 @result{} find-file
|
|
|
879 @end group
|
|
|
880 @group
|
|
|
881 (lookup-key (current-global-map) "\C-x\C-f12345")
|
|
|
882 @result{} 2
|
|
|
883 @end group
|
|
|
884 @end example
|
|
|
885
|
|
|
886 If @var{key} begins with the character whose value is contained in
|
|
|
887 @code{meta-prefix-char}, that character is implicitly removed and the
|
|
|
888 @key{META} modifier added to the key. Thus, the first example below is
|
|
|
889 handled by conversion into the second example.
|
|
|
890
|
|
|
891 @example
|
|
|
892 @group
|
|
|
893 (lookup-key (current-global-map) "\ef")
|
|
|
894 @result{} forward-word
|
|
|
895 @end group
|
|
|
896 @group
|
|
|
897 (lookup-key (current-global-map) "\M-f")
|
|
|
898 @result{} forward-word
|
|
|
899 @end group
|
|
|
900 @end example
|
|
|
901
|
|
|
902 Unlike @code{read-key-sequence}, this function does not modify the
|
|
|
903 specified events in ways that discard information (@pxref{Key Sequence
|
|
|
904 Input}). In particular, it does not convert letters to lower case.
|
|
|
905 @end defun
|
|
|
906
|
|
|
907 @deffn Command undefined
|
|
|
908 Used in keymaps to undefine keys. If a key sequence is defined to this,
|
|
|
909 invoking this key sequence causes a ``key undefined'' error, just as if
|
|
|
910 the key sequence had no binding.
|
|
|
911 @end deffn
|
|
|
912
|
|
|
913 @defun key-binding key &optional accept-defaults
|
|
|
914 This function returns the binding for @var{key} in the current
|
|
|
915 keymaps, trying all the active keymaps. The result is @code{nil} if
|
|
|
916 @var{key} is undefined in the keymaps.
|
|
|
917
|
|
|
918 @c Emacs 19 feature
|
|
|
919 The argument @var{accept-defaults} controls checking for default
|
|
|
920 bindings, as in @code{lookup-key} (above).
|
|
|
921
|
|
|
922 @example
|
|
|
923 @group
|
|
|
924 (key-binding "\C-x\C-f")
|
|
|
925 @result{} find-file
|
|
|
926 (key-binding '(control home))
|
|
|
927 @result{} beginning-of-buffer
|
|
|
928 (key-binding [escape escape escape])
|
|
|
929 @result{} keyboard-escape-quit
|
|
|
930 @end group
|
|
|
931 @end example
|
|
|
932 @end defun
|
|
|
933
|
|
|
934 @defun local-key-binding key &optional accept-defaults
|
|
|
935 This function returns the binding for @var{key} in the current
|
|
|
936 local keymap, or @code{nil} if it is undefined there.
|
|
|
937
|
|
|
938 @c Emacs 19 feature
|
|
|
939 The argument @var{accept-defaults} controls checking for default bindings,
|
|
|
940 as in @code{lookup-key} (above).
|
|
|
941 @end defun
|
|
|
942
|
|
|
943 @defun global-key-binding key &optional accept-defaults
|
|
|
944 This function returns the binding for command @var{key} in the
|
|
|
945 current global keymap, or @code{nil} if it is undefined there.
|
|
|
946
|
|
|
947 @c Emacs 19 feature
|
|
|
948 The argument @var{accept-defaults} controls checking for default bindings,
|
|
|
949 as in @code{lookup-key} (above).
|
|
|
950 @end defun
|
|
|
951
|
|
|
952 @c Emacs 19 feature
|
|
|
953 @defun minor-mode-key-binding key &optional accept-defaults
|
|
|
954 This function returns a list of all the active minor mode bindings of
|
|
|
955 @var{key}. More precisely, it returns an alist of pairs
|
|
|
956 @code{(@var{modename} . @var{binding})}, where @var{modename} is the
|
|
|
957 variable that enables the minor mode, and @var{binding} is @var{key}'s
|
|
|
958 binding in that mode. If @var{key} has no minor-mode bindings, the
|
|
|
959 value is @code{nil}.
|
|
|
960
|
|
|
961 If the first binding is not a prefix command, all subsequent bindings
|
|
|
962 from other minor modes are omitted, since they would be completely
|
|
|
963 shadowed. Similarly, the list omits non-prefix bindings that follow
|
|
|
964 prefix bindings.
|
|
|
965
|
|
|
966 The argument @var{accept-defaults} controls checking for default
|
|
|
967 bindings, as in @code{lookup-key} (above).
|
|
|
968 @end defun
|
|
|
969
|
|
|
970 @defvar meta-prefix-char
|
|
|
971 @cindex @key{ESC}
|
|
|
972 This variable is the meta-prefix character code. It is used when
|
|
|
973 translating a two-character sequence to a meta character so it can be
|
|
|
974 looked up in a keymap. For useful results, the value should be a prefix
|
|
|
975 event (@pxref{Prefix Keys}). The default value is @code{?\^[} (integer
|
|
|
976 27), which is the @sc{ASCII} character usually produced by the @key{ESC}
|
|
|
977 key.
|
|
|
978
|
|
|
979 As long as the value of @code{meta-prefix-char} remains @code{?\^[},
|
|
|
980 key lookup translates @kbd{@key{ESC} b} into @kbd{M-b}, which is
|
|
|
981 normally defined as the @code{backward-word} command. However, if you
|
|
|
982 set @code{meta-prefix-char} to @code{?\^X} (i.e. the keystroke
|
|
|
983 @kbd{C-x}) or its equivalent @sc{ASCII} code @code{24}, then XEmacs will
|
|
|
984 translate @kbd{C-x b} (whose standard binding is the
|
|
|
985 @code{switch-to-buffer} command) into @kbd{M-b}.
|
|
|
986
|
|
|
987 @smallexample
|
|
|
988 @group
|
|
|
989 meta-prefix-char ; @r{The default value.}
|
|
|
990 @result{} ?\^[ ; @r{Under XEmacs 20.}
|
|
|
991 @result{} 27 ; @r{Under XEmacs 19.}
|
|
|
992 @end group
|
|
|
993 @group
|
|
|
994 (key-binding "\eb")
|
|
|
995 @result{} backward-word
|
|
|
996 @end group
|
|
|
997 @group
|
|
|
998 ?\C-x ; @r{The print representation}
|
|
|
999 ; @r{of a character.}
|
|
|
1000 @result{} ?\^X ; @r{Under XEmacs 20.}
|
|
|
1001 @result{} 24 ; @r{Under XEmacs 19.}
|
|
|
1002 @end group
|
|
|
1003 @group
|
|
|
1004 (setq meta-prefix-char 24)
|
|
|
1005 @result{} 24
|
|
|
1006 @end group
|
|
|
1007 @group
|
|
|
1008 (key-binding "\C-xb")
|
|
|
1009 @result{} backward-word ; @r{Now, typing @kbd{C-x b} is}
|
|
|
1010 ; @r{like typing @kbd{M-b}.}
|
|
|
1011
|
|
|
1012 (setq meta-prefix-char ?\e) ; @r{Avoid confusion!}
|
|
|
1013 ; @r{Restore the default value!}
|
|
|
1014 @result{} ?\^[ ; @r{Under XEmacs 20.}
|
|
|
1015 @result{} 27 ; @r{Under XEmacs 19.}
|
|
|
1016 @end group
|
|
|
1017 @end smallexample
|
|
|
1018 @end defvar
|
|
|
1019
|
|
|
1020 @node Changing Key Bindings
|
|
|
1021 @section Changing Key Bindings
|
|
|
1022 @cindex changing key bindings
|
|
|
1023 @cindex rebinding
|
|
|
1024
|
|
|
1025 The way to rebind a key is to change its entry in a keymap. If you
|
|
|
1026 change a binding in the global keymap, the change is effective in all
|
|
|
1027 buffers (though it has no direct effect in buffers that shadow the
|
|
|
1028 global binding with a local one). If you change the current buffer's
|
|
|
1029 local map, that usually affects all buffers using the same major mode.
|
|
|
1030 The @code{global-set-key} and @code{local-set-key} functions are
|
|
|
1031 convenient interfaces for these operations (@pxref{Key Binding
|
|
|
1032 Commands}). You can also use @code{define-key}, a more general
|
|
|
1033 function; then you must specify explicitly the map to change.
|
|
|
1034
|
|
|
1035 The way to specify the key sequence that you want to rebind is
|
|
|
1036 described above (@pxref{Key Sequences}).
|
|
|
1037
|
|
|
1038 For the functions below, an error is signaled if @var{keymap} is not a
|
|
|
1039 keymap or if @var{key} is not a string or vector representing a key
|
|
|
1040 sequence. You can use event types (symbols) as shorthand for events
|
|
|
1041 that are lists.
|
|
|
1042
|
|
|
1043 @defun define-key keymap key binding
|
|
|
1044 This function sets the binding for @var{key} in @var{keymap}. (If
|
|
|
1045 @var{key} is more than one event long, the change is actually made
|
|
|
1046 in another keymap reached from @var{keymap}.) The argument
|
|
|
1047 @var{binding} can be any Lisp object, but only certain types are
|
|
|
1048 meaningful. (For a list of meaningful types, see @ref{Key Lookup}.)
|
|
|
1049 The value returned by @code{define-key} is @var{binding}.
|
|
|
1050
|
|
|
1051 @cindex invalid prefix key error
|
|
|
1052 @cindex key sequence error
|
|
|
1053 Every prefix of @var{key} must be a prefix key (i.e., bound to a
|
|
|
1054 keymap) or undefined; otherwise an error is signaled.
|
|
|
1055
|
|
|
1056 If some prefix of @var{key} is undefined, then @code{define-key} defines
|
|
|
1057 it as a prefix key so that the rest of @var{key} may be defined as
|
|
|
1058 specified.
|
|
|
1059 @end defun
|
|
|
1060
|
|
|
1061 Here is an example that creates a sparse keymap and makes a number of
|
|
|
1062 bindings in it:
|
|
|
1063
|
|
|
1064 @smallexample
|
|
|
1065 @group
|
|
|
1066 (setq map (make-sparse-keymap))
|
|
|
1067 @result{} #<keymap 0 entries 0xbee>
|
|
|
1068 @end group
|
|
|
1069 @group
|
|
|
1070 (define-key map "\C-f" 'forward-char)
|
|
|
1071 @result{} forward-char
|
|
|
1072 @end group
|
|
|
1073 @group
|
|
|
1074 map
|
|
|
1075 @result{} #<keymap 1 entry 0xbee>
|
|
|
1076 (describe-bindings-internal map)
|
|
|
1077 @result{} ; @r{(Inserted in buffer)}
|
|
|
1078 C-f forward-char
|
|
|
1079 @end group
|
|
|
1080
|
|
|
1081 @group
|
|
|
1082 ;; @r{Build sparse submap for @kbd{C-x} and bind @kbd{f} in that.}
|
|
|
1083 (define-key map "\C-xf" 'forward-word)
|
|
|
1084 @result{} forward-word
|
|
|
1085 @end group
|
|
|
1086 @group
|
|
|
1087 map
|
|
|
1088 @result{} #<keymap 2 entries 0xbee>
|
|
|
1089 (describe-bindings-internal map)
|
|
|
1090 @result{} ; @r{(Inserted in buffer)}
|
|
|
1091 C-f forward-char
|
|
|
1092 C-x << Prefix Command >>
|
|
|
1093
|
|
|
1094 C-x f forward-word
|
|
|
1095 @end group
|
|
|
1096
|
|
|
1097 @group
|
|
|
1098 ;; @r{Bind @kbd{C-p} to the @code{ctl-x-map}.}
|
|
|
1099 (define-key map "\C-p" ctl-x-map)
|
|
|
1100 ;; @code{ctl-x-map}
|
|
|
1101 @result{} #<keymap Control-X-prefix 77 entries 0x3bf>
|
|
|
1102 @end group
|
|
|
1103
|
|
|
1104 @group
|
|
|
1105 ;; @r{Bind @kbd{C-f} to @code{foo} in the @code{ctl-x-map}.}
|
|
|
1106 (define-key map "\C-p\C-f" 'foo)
|
|
|
1107 @result{} foo
|
|
|
1108 @end group
|
|
|
1109 @group
|
|
|
1110 map
|
|
|
1111 @result{} #<keymap 3 entries 0xbee>
|
|
|
1112 (describe-bindings-internal map)
|
|
|
1113 @result{} ; @r{(Inserted in buffer)}
|
|
|
1114 C-f forward-char
|
|
|
1115 C-p << Prefix command Control-X-prefix >>
|
|
|
1116 C-x << Prefix Command >>
|
|
|
1117
|
|
|
1118 C-p tab indent-rigidly
|
|
|
1119 C-p $ set-selective-display
|
|
|
1120 C-p ' expand-abbrev
|
|
|
1121 C-p ( start-kbd-macro
|
|
|
1122 C-p ) end-kbd-macro
|
|
|
1123 @dots{}
|
|
|
1124 C-p C-x exchange-point-and-mark
|
|
|
1125 C-p C-z suspend-or-iconify-emacs
|
|
|
1126 C-p M-escape repeat-complex-command
|
|
|
1127 C-p M-C-[ repeat-complex-command
|
|
|
1128
|
|
|
1129 C-x f forward-word
|
|
|
1130
|
|
|
1131 C-p 4 . find-tag-other-window
|
|
|
1132 @dots{}
|
|
|
1133 C-p 4 C-o display-buffer
|
|
|
1134
|
|
|
1135 C-p 5 0 delete-frame
|
|
|
1136 @dots{}
|
|
|
1137 C-p 5 C-f find-file-other-frame
|
|
|
1138
|
|
|
1139 @dots{}
|
|
|
1140
|
|
|
1141 C-p a i g inverse-add-global-abbrev
|
|
|
1142 C-p a i l inverse-add-mode-abbrev
|
|
|
1143 @end group
|
|
|
1144 @end smallexample
|
|
|
1145
|
|
|
1146 @noindent
|
|
|
1147 Note that storing a new binding for @kbd{C-p C-f} actually works by
|
|
|
1148 changing an entry in @code{ctl-x-map}, and this has the effect of
|
|
|
1149 changing the bindings of both @kbd{C-p C-f} and @kbd{C-x C-f} in the
|
|
|
1150 default global map.
|
|
|
1151
|
|
|
1152 @defun substitute-key-definition olddef newdef keymap &optional oldmap
|
|
|
1153 @cindex replace bindings
|
|
|
1154 This function replaces @var{olddef} with @var{newdef} for any keys in
|
|
|
1155 @var{keymap} that were bound to @var{olddef}. In other words,
|
|
|
1156 @var{olddef} is replaced with @var{newdef} wherever it appears. The
|
|
|
1157 function returns @code{nil}.
|
|
|
1158
|
|
|
1159 For example, this redefines @kbd{C-x C-f}, if you do it in an XEmacs with
|
|
|
1160 standard bindings:
|
|
|
1161
|
|
|
1162 @smallexample
|
|
|
1163 @group
|
|
|
1164 (substitute-key-definition
|
|
|
1165 'find-file 'find-file-read-only (current-global-map))
|
|
|
1166 @end group
|
|
|
1167 @end smallexample
|
|
|
1168
|
|
|
1169 @c Emacs 19 feature
|
|
|
1170 If @var{oldmap} is non-@code{nil}, then its bindings determine which
|
|
|
1171 keys to rebind. The rebindings still happen in @var{newmap}, not in
|
|
|
1172 @var{oldmap}. Thus, you can change one map under the control of the
|
|
|
1173 bindings in another. For example,
|
|
|
1174
|
|
|
1175 @smallexample
|
|
|
1176 (substitute-key-definition
|
|
|
1177 'delete-backward-char 'my-funny-delete
|
|
|
1178 my-map global-map)
|
|
|
1179 @end smallexample
|
|
|
1180
|
|
|
1181 @noindent
|
|
|
1182 puts the special deletion command in @code{my-map} for whichever keys
|
|
|
1183 are globally bound to the standard deletion command.
|
|
|
1184
|
|
|
1185 @ignore
|
|
|
1186 @c Emacs 18 only
|
|
|
1187 Prefix keymaps that appear within @var{keymap} are not checked
|
|
|
1188 recursively for keys bound to @var{olddef}; they are not changed at all.
|
|
|
1189 Perhaps it would be better to check nested keymaps recursively.
|
|
|
1190 @end ignore
|
|
|
1191
|
|
|
1192 @ignore @c #### fix this up.
|
|
|
1193 Here is an example showing a keymap before and after substitution:
|
|
|
1194
|
|
|
1195 @smallexample
|
|
|
1196 @group
|
|
|
1197 (setq map '(keymap
|
|
|
1198 (?1 . olddef-1)
|
|
|
1199 (?2 . olddef-2)
|
|
|
1200 (?3 . olddef-1)))
|
|
|
1201 @result{} (keymap (49 . olddef-1) (50 . olddef-2) (51 . olddef-1))
|
|
|
1202 @end group
|
|
|
1203
|
|
|
1204 @group
|
|
|
1205 (substitute-key-definition 'olddef-1 'newdef map)
|
|
|
1206 @result{} nil
|
|
|
1207 @end group
|
|
|
1208 @group
|
|
|
1209 map
|
|
|
1210 @result{} (keymap (49 . newdef) (50 . olddef-2) (51 . newdef))
|
|
|
1211 @end group
|
|
|
1212 @end smallexample
|
|
|
1213 @end ignore
|
|
|
1214 @end defun
|
|
|
1215
|
|
|
1216 @defun suppress-keymap keymap &optional nodigits
|
|
|
1217 @cindex @code{self-insert-command} override
|
|
|
1218 This function changes the contents of the full keymap @var{keymap} by
|
|
|
1219 making all the printing characters undefined. More precisely, it binds
|
|
|
1220 them to the command @code{undefined}. This makes ordinary insertion of
|
|
|
1221 text impossible. @code{suppress-keymap} returns @code{nil}.
|
|
|
1222
|
|
|
1223 If @var{nodigits} is @code{nil}, then @code{suppress-keymap} defines
|
|
|
1224 digits to run @code{digit-argument}, and @kbd{-} to run
|
|
|
1225 @code{negative-argument}. Otherwise it makes them undefined like the
|
|
|
1226 rest of the printing characters.
|
|
|
1227
|
|
|
1228 @cindex yank suppression
|
|
|
1229 @cindex @code{quoted-insert} suppression
|
|
|
1230 The @code{suppress-keymap} function does not make it impossible to
|
|
|
1231 modify a buffer, as it does not suppress commands such as @code{yank}
|
|
|
1232 and @code{quoted-insert}. To prevent any modification of a buffer, make
|
|
|
1233 it read-only (@pxref{Read Only Buffers}).
|
|
|
1234
|
|
|
1235 Since this function modifies @var{keymap}, you would normally use it
|
|
|
1236 on a newly created keymap. Operating on an existing keymap
|
|
|
1237 that is used for some other purpose is likely to cause trouble; for
|
|
|
1238 example, suppressing @code{global-map} would make it impossible to use
|
|
|
1239 most of XEmacs.
|
|
|
1240
|
|
|
1241 Most often, @code{suppress-keymap} is used to initialize local
|
|
|
1242 keymaps of modes such as Rmail and Dired where insertion of text is not
|
|
|
1243 desirable and the buffer is read-only. Here is an example taken from
|
|
|
1244 the file @file{emacs/lisp/dired.el}, showing how the local keymap for
|
|
|
1245 Dired mode is set up:
|
|
|
1246
|
|
|
1247 @smallexample
|
|
|
1248 @group
|
|
|
1249 @dots{}
|
|
|
1250 (setq dired-mode-map (make-keymap))
|
|
|
1251 (suppress-keymap dired-mode-map)
|
|
|
1252 (define-key dired-mode-map "r" 'dired-rename-file)
|
|
|
1253 (define-key dired-mode-map "\C-d" 'dired-flag-file-deleted)
|
|
|
1254 (define-key dired-mode-map "d" 'dired-flag-file-deleted)
|
|
|
1255 (define-key dired-mode-map "v" 'dired-view-file)
|
|
|
1256 (define-key dired-mode-map "e" 'dired-find-file)
|
|
|
1257 (define-key dired-mode-map "f" 'dired-find-file)
|
|
|
1258 @dots{}
|
|
|
1259 @end group
|
|
|
1260 @end smallexample
|
|
|
1261 @end defun
|
|
|
1262
|
|
|
1263 @node Key Binding Commands
|
|
|
1264 @section Commands for Binding Keys
|
|
|
1265
|
|
|
1266 This section describes some convenient interactive interfaces for
|
|
|
1267 changing key bindings. They work by calling @code{define-key}.
|
|
|
1268
|
|
|
1269 People often use @code{global-set-key} in their @file{.emacs} file for
|
|
|
1270 simple customization. For example,
|
|
|
1271
|
|
|
1272 @smallexample
|
|
|
1273 (global-set-key "\C-x\C-\\" 'next-line)
|
|
|
1274 @end smallexample
|
|
|
1275
|
|
|
1276 @noindent
|
|
|
1277 or
|
|
|
1278
|
|
|
1279 @smallexample
|
|
|
1280 (global-set-key [(control ?x) (control ?\\)] 'next-line)
|
|
|
1281 @end smallexample
|
|
|
1282
|
|
|
1283 @noindent
|
|
|
1284 or
|
|
|
1285
|
|
|
1286 @smallexample
|
|
|
1287 (global-set-key [?\C-x ?\C-\\] 'next-line)
|
|
|
1288 @end smallexample
|
|
|
1289
|
|
|
1290 @noindent
|
|
|
1291 redefines @kbd{C-x C-\} to move down a line.
|
|
|
1292
|
|
|
1293 @smallexample
|
|
|
1294 (global-set-key [(meta button1)] 'mouse-set-point)
|
|
|
1295 @end smallexample
|
|
|
1296
|
|
|
1297 @noindent
|
|
|
1298 redefines the first (leftmost) mouse button, typed with the Meta key, to
|
|
|
1299 set point where you click.
|
|
|
1300
|
|
|
1301 @deffn Command global-set-key key definition
|
|
|
1302 This function sets the binding of @var{key} in the current global map
|
|
|
1303 to @var{definition}.
|
|
|
1304
|
|
|
1305 @smallexample
|
|
|
1306 @group
|
|
|
1307 (global-set-key @var{key} @var{definition})
|
|
|
1308 @equiv{}
|
|
|
1309 (define-key (current-global-map) @var{key} @var{definition})
|
|
|
1310 @end group
|
|
|
1311 @end smallexample
|
|
|
1312 @end deffn
|
|
|
1313
|
|
|
1314 @deffn Command global-unset-key key
|
|
|
1315 @cindex unbinding keys
|
|
|
1316 This function removes the binding of @var{key} from the current
|
|
|
1317 global map.
|
|
|
1318
|
|
|
1319 One use of this function is in preparation for defining a longer key
|
|
|
1320 that uses @var{key} as a prefix---which would not be allowed if
|
|
|
1321 @var{key} has a non-prefix binding. For example:
|
|
|
1322
|
|
|
1323 @smallexample
|
|
|
1324 @group
|
|
|
1325 (global-unset-key "\C-l")
|
|
|
1326 @result{} nil
|
|
|
1327 @end group
|
|
|
1328 @group
|
|
|
1329 (global-set-key "\C-l\C-l" 'redraw-display)
|
|
|
1330 @result{} nil
|
|
|
1331 @end group
|
|
|
1332 @end smallexample
|
|
|
1333
|
|
|
1334 This function is implemented simply using @code{define-key}:
|
|
|
1335
|
|
|
1336 @smallexample
|
|
|
1337 @group
|
|
|
1338 (global-unset-key @var{key})
|
|
|
1339 @equiv{}
|
|
|
1340 (define-key (current-global-map) @var{key} nil)
|
|
|
1341 @end group
|
|
|
1342 @end smallexample
|
|
|
1343 @end deffn
|
|
|
1344
|
|
|
1345 @deffn Command local-set-key key definition
|
|
|
1346 This function sets the binding of @var{key} in the current local
|
|
|
1347 keymap to @var{definition}.
|
|
|
1348
|
|
|
1349 @smallexample
|
|
|
1350 @group
|
|
|
1351 (local-set-key @var{key} @var{definition})
|
|
|
1352 @equiv{}
|
|
|
1353 (define-key (current-local-map) @var{key} @var{definition})
|
|
|
1354 @end group
|
|
|
1355 @end smallexample
|
|
|
1356 @end deffn
|
|
|
1357
|
|
|
1358 @deffn Command local-unset-key key
|
|
|
1359 This function removes the binding of @var{key} from the current
|
|
|
1360 local map.
|
|
|
1361
|
|
|
1362 @smallexample
|
|
|
1363 @group
|
|
|
1364 (local-unset-key @var{key})
|
|
|
1365 @equiv{}
|
|
|
1366 (define-key (current-local-map) @var{key} nil)
|
|
|
1367 @end group
|
|
|
1368 @end smallexample
|
|
|
1369 @end deffn
|
|
|
1370
|
|
|
1371 @node Scanning Keymaps
|
|
|
1372 @section Scanning Keymaps
|
|
|
1373
|
|
|
1374 This section describes functions used to scan all the current keymaps,
|
|
|
1375 or all keys within a keymap, for the sake of printing help information.
|
|
|
1376
|
|
|
1377 @defun accessible-keymaps keymap &optional prefix
|
|
|
1378 This function returns a list of all the keymaps that can be accessed
|
|
|
1379 (via prefix keys) from @var{keymap}. The value is an association list
|
|
|
1380 with elements of the form @code{(@var{key} .@: @var{map})}, where
|
|
|
1381 @var{key} is a prefix key whose definition in @var{keymap} is
|
|
|
1382 @var{map}.
|
|
|
1383
|
|
|
1384 The elements of the alist are ordered so that the @var{key} increases
|
|
|
1385 in length. The first element is always @code{([] .@: @var{keymap})},
|
|
|
1386 because the specified keymap is accessible from itself with a prefix of
|
|
|
1387 no events.
|
|
|
1388
|
|
|
1389 If @var{prefix} is given, it should be a prefix key sequence; then
|
|
|
1390 @code{accessible-keymaps} includes only the submaps whose prefixes start
|
|
|
1391 with @var{prefix}. These elements look just as they do in the value of
|
|
|
1392 @code{(accessible-keymaps)}; the only difference is that some elements
|
|
|
1393 are omitted.
|
|
|
1394
|
|
|
1395 In the example below, the returned alist indicates that the key
|
|
|
1396 @kbd{C-x}, which is displayed as @samp{[(control x)]}, is a prefix key
|
|
|
1397 whose definition is the keymap @code{#<keymap ((control x) #<keymap
|
|
|
1398 emacs-lisp-mode-map 8 entries 0x546>) 1 entry 0x8a2>}. (The strange
|
|
|
1399 notation for the keymap's name indicates that this is an internal submap
|
|
|
1400 of @code{emacs-lisp-mode-map}. This is because
|
|
|
1401 @code{lisp-interaction-mode-map} has set up @code{emacs-lisp-mode-map}
|
|
|
1402 as its parent, and @code{lisp-interaction-mode-map} defines no key
|
|
|
1403 sequences beginning with @kbd{C-x}.)
|
|
|
1404
|
|
|
1405 @smallexample
|
|
|
1406 @group
|
|
|
1407 (current-local-map)
|
|
|
1408 @result{} #<keymap lisp-interaction-mode-map 5 entries 0x558>
|
|
|
1409 (accessible-keymaps (current-local-map))
|
|
|
1410 @result{}(([] . #<keymap lisp-interaction-mode-map 5 entries 0x558>)
|
|
|
1411 ([(control x)] .
|
|
|
1412 #<keymap ((control x) #<keymap emacs-lisp-mode-map 8 entries 0x546>)
|
|
|
1413 1 entry 0x8a2>))
|
|
|
1414 @end group
|
|
|
1415 @end smallexample
|
|
|
1416
|
|
|
1417 The following example shows the results of calling
|
|
|
1418 @code{accessible-keymaps} on a large, complex keymap. Notice how
|
|
|
1419 some keymaps were given explicit names using @code{set-keymap-name};
|
|
|
1420 those submaps without explicit names are given descriptive names
|
|
|
1421 indicating their relationship to their enclosing keymap.
|
|
|
1422
|
|
|
1423 @smallexample
|
|
|
1424 @group
|
|
|
1425 (accessible-keymaps (current-global-map))
|
|
|
1426 @result{} (([] . #<keymap global-map 639 entries 0x221>)
|
|
|
1427 ([(control c)] . #<keymap mode-specific-command-prefix 1 entry 0x3cb>)
|
|
|
1428 ([(control h)] . #<keymap help-map 33 entries 0x4ec>)
|
|
|
1429 ([(control x)] . #<keymap Control-X-prefix 77 entries 0x3bf>)
|
|
|
1430 ([(meta escape)] .
|
|
|
1431 #<keymap ((meta escape) #<keymap global-map 639 entries 0x221>)
|
|
|
1432 3 entries 0x3e0>)
|
|
|
1433 ([(meta control \[)] .
|
|
|
1434 #<keymap ((meta escape) #<keymap global-map 639 entries 0x221>)
|
|
|
1435 3 entries 0x3e0>)
|
|
|
1436 ([f1] . #<keymap help-map 33 entries 0x4ec>)
|
|
|
1437 ([(control x) \4] . #<keymap ctl-x-4-prefix 9 entries 0x3c5>)
|
|
|
1438 ([(control x) \5] . #<keymap ctl-x-5-prefix 8 entries 0x3c8>)
|
|
|
1439 ([(control x) \6] . #<keymap 13 entries 0x4d2>)
|
|
|
1440 ([(control x) a] .
|
|
|
1441 #<keymap (a #<keymap Control-X-prefix 77 entries 0x3bf>)
|
|
|
1442 8 entries 0x3ef>)
|
|
|
1443 ([(control x) n] . #<keymap narrowing-prefix 3 entries 0x3dd>)
|
|
|
1444 ([(control x) r] . #<keymap rectangle-prefix 18 entries 0x3e9>)
|
|
|
1445 ([(control x) v] . #<keymap vc-prefix-map 13 entries 0x60e>)
|
|
|
1446 ([(control x) a i] .
|
|
|
1447 #<keymap (i #<keymap (a #<keymap Control-X-prefix 77 entries 0x3bf>)
|
|
|
1448 8 entries 0x3ef>)
|
|
|
1449 2 entries 0x3f5>))
|
|
|
1450 @end group
|
|
|
1451 @end smallexample
|
|
|
1452 @end defun
|
|
|
1453
|
|
|
1454 @defun map-keymap function keymap &optional sort-first
|
|
|
1455 This function applies @var{function} to each element of @code{KEYMAP}.
|
|
|
1456 @var{function} will be called with two arguments: a key-description
|
|
|
1457 list, and the binding. The order in which the elements of the keymap
|
|
|
1458 are passed to the function is unspecified. If the function inserts new
|
|
|
1459 elements into the keymap, it may or may not be called with them later.
|
|
|
1460 No element of the keymap will ever be passed to the function more than
|
|
|
1461 once.
|
|
|
1462
|
|
|
1463 The function will not be called on elements of this keymap's parents
|
|
|
1464 (@pxref{Inheritance and Keymaps}) or upon keymaps which are contained
|
|
|
1465 within this keymap (multi-character definitions). It will be called on
|
|
|
1466 @key{META} characters since they are not really two-character sequences.
|
|
|
1467
|
|
|
1468 If the optional third argument @var{sort-first} is non-@code{nil}, then
|
|
|
1469 the elements of the keymap will be passed to the mapper function in a
|
|
|
1470 canonical order. Otherwise, they will be passed in hash (that is,
|
|
|
1471 random) order, which is faster.
|
|
|
1472 @end defun
|
|
|
1473
|
|
|
1474 @defun keymap-fullness keymap
|
|
|
1475 This function returns the number of bindings in the keymap.
|
|
|
1476 @end defun
|
|
|
1477
|
|
|
1478 @defun where-is-internal definition &optional keymaps firstonly noindirect event-or-keys
|
|
|
1479 This function returns a list of key sequences (of any length) that are
|
|
|
1480 bound to @var{definition} in a set of keymaps.
|
|
|
1481
|
|
|
1482 The argument @var{definition} can be any object; it is compared with all
|
|
|
1483 keymap entries using @code{eq}.
|
|
|
1484
|
|
|
1485 KEYMAPS can be either a keymap (meaning search in that keymap and the
|
|
|
1486 current global keymap) or a list of keymaps (meaning search in exactly
|
|
|
1487 those keymaps and no others). If KEYMAPS is nil, search in the currently
|
|
|
1488 applicable maps for EVENT-OR-KEYS.
|
|
|
1489
|
|
|
1490 If @var{keymap} is a keymap, then the maps searched are @var{keymap} and
|
|
|
1491 the global keymap. If @var{keymap} is a list of keymaps, then the maps
|
|
|
1492 searched are exactly those keymaps, and no others. If @var{keymap} is
|
|
|
1493 @code{nil}, then the maps used are the current active keymaps for
|
|
|
1494 @var{event-or-keys} (this is equivalent to specifying
|
|
|
1495 @code{(current-keymaps @var{event-or-keys})} as the argument to
|
|
|
1496 @var{keymaps}).
|
|
|
1497
|
|
|
1498 If @var{firstonly} is non-@code{nil}, then the value is a single
|
|
|
1499 vector representing the first key sequence found, rather than a list of
|
|
|
1500 all possible key sequences.
|
|
|
1501 @ignore @c #### Should fix where-is to be more like FSF
|
|
|
1502 If @var{firstonly} is @code{non-ascii}, then the value is a single
|
|
|
1503 string representing the first key sequence found, rather than a list of
|
|
|
1504 all possible key sequences. If @var{firstonly} is @code{t}, then the
|
|
|
1505 value is the first key sequence, except that key sequences consisting
|
|
|
1506 entirely of @sc{ASCII} characters (or meta variants of @sc{ASCII}
|
|
|
1507 characters) are preferred to all other key sequences.
|
|
|
1508 @end ignore
|
|
|
1509
|
|
|
1510 If @var{noindirect} is non-@code{nil}, @code{where-is-internal} doesn't
|
|
|
1511 follow indirect keymap bindings. This makes it possible to search for
|
|
|
1512 an indirect definition itself.
|
|
|
1513
|
|
|
1514 This function is used by @code{where-is} (@pxref{Help, , Help, emacs,
|
|
|
1515 The XEmacs Reference Manual}).
|
|
|
1516
|
|
|
1517 @smallexample
|
|
|
1518 @group
|
|
|
1519 (where-is-internal 'describe-function)
|
|
|
1520 @result{} ([(control h) d] [(control h) f] [f1 d] [f1 f])
|
|
|
1521 @end group
|
|
|
1522 @end smallexample
|
|
|
1523 @end defun
|
|
|
1524
|
|
|
1525 @defun describe-bindings-internal map &optional all shadow prefix mouse-only-p
|
|
|
1526 This function inserts (into the current buffer) a list of all defined
|
|
|
1527 keys and their definitions in @var{map}. Optional second argument
|
|
|
1528 @var{all} says whether to include even ``uninteresting'' definitions,
|
|
|
1529 i.e. symbols with a non-@code{nil} @code{suppress-keymap} property.
|
|
|
1530 Third argument @var{shadow} is a list of keymaps whose bindings shadow
|
|
|
1531 those of map; if a binding is present in any shadowing map, it is not
|
|
|
1532 printed. Fourth argument @var{prefix}, if non-@code{nil}, should be a
|
|
|
1533 key sequence; only bindings which start with that key sequence will be
|
|
|
1534 printed. Fifth argument @var{mouse-only-p} says to only print bindings
|
|
|
1535 for mouse clicks.
|
|
|
1536 @end defun
|
|
|
1537
|
|
|
1538 @code{describe-bindings-internal} is used to implement the
|
|
|
1539 help command @code{describe-bindings}.
|
|
|
1540
|
|
|
1541 @deffn Command describe-bindings prefix mouse-only-p
|
|
|
1542 This function creates a listing of all defined keys and their
|
|
|
1543 definitions. It writes the listing in a buffer named @samp{*Help*} and
|
|
|
1544 displays it in a window.
|
|
|
1545
|
|
|
1546 If @var{prefix} is non-@code{nil}, it should be a prefix key; then the
|
|
|
1547 listing includes only keys that start with @var{prefix}.
|
|
|
1548
|
|
|
1549 When several characters with consecutive @sc{ASCII} codes have the
|
|
|
1550 same definition, they are shown together, as
|
|
|
1551 @samp{@var{firstchar}..@var{lastchar}}. In this instance, you need to
|
|
|
1552 know the @sc{ASCII} codes to understand which characters this means.
|
|
|
1553 For example, in the default global map, the characters @samp{@key{SPC}
|
|
|
1554 ..@: ~} are described by a single line. @key{SPC} is @sc{ASCII} 32,
|
|
|
1555 @kbd{~} is @sc{ASCII} 126, and the characters between them include all
|
|
|
1556 the normal printing characters, (e.g., letters, digits, punctuation,
|
|
|
1557 etc.@:); all these characters are bound to @code{self-insert-command}.
|
|
|
1558
|
|
|
1559 If the second argument (prefix arg, interactively) is non-@code{nil}
|
|
|
1560 then only the mouse bindings are displayed.
|
|
|
1561 @end deffn
|
|
|
1562
|
|
|
1563 @node Other Keymap Functions
|
|
|
1564 @section Other Keymap Functions
|
|
|
1565
|
|
|
1566 @defun set-keymap-prompt keymap new-prompt
|
|
|
1567 This function sets the ``prompt'' of @var{keymap} to string
|
|
|
1568 @var{new-prompt}, or @code{nil} if no prompt is desired. The prompt is
|
|
|
1569 shown in the echo-area when reading a key-sequence to be looked-up in
|
|
|
1570 this keymap.
|
|
|
1571 @end defun
|
|
|
1572
|
|
|
1573 @defun keymap-prompt keymap &optional use-inherited
|
|
|
1574 This function returns the ``prompt'' of the given keymap.
|
|
|
1575 If @var{use-inherited} is non-@code{nil}, any parent keymaps
|
|
|
1576 will also be searched for a prompt.
|
|
|
1577 @end defun
|
