@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2000
-@c Free Software Foundation, Inc.
+@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2000, 2002, 2003,
+@c 2004, 2005, 2006 Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@setfilename ../info/keymaps
@node Keymaps, Modes, Command Loop, Top
The bindings between input events and commands are recorded in data
structures called @dfn{keymaps}. Each binding in a keymap associates
-(or @dfn{binds}) an individual event type either to another keymap or to
+(or @dfn{binds}) an individual event type, either to another keymap or to
a command. When an event type is bound to a keymap, that keymap is used
to look up the next input event; this continues until a command is
found. The whole process is called @dfn{key lookup}.
* Inheritance and Keymaps:: How one keymap can inherit the bindings
of another keymap.
* Prefix Keys:: Defining a key with a keymap as its definition.
-* Active Keymaps:: Each buffer has a local keymap
+* Active Keymaps:: How Emacs searches the active keymaps
+ for a key binding.
+* Searching Keymaps:: A pseudo-Lisp summary of searching active maps.
+* Controlling Active Maps:: Each buffer has a local keymap
to override the standard (global) bindings.
A minor mode can also override them.
-* Key Lookup:: How extracting elements from keymaps works.
+* Key Lookup:: Finding a key's binding in one keymap.
* Functions for Key Lookup:: How to request key lookup.
* Changing Key Bindings:: Redefining a key in a keymap.
* Remapping Commands:: Bindings that translate one command to another.
keymaps shadow both local and global keymaps. @xref{Active Keymaps},
for details.
+ The Emacs Lisp representation for a key sequence is a string or vector.
+You can enter key sequence constants using the ordinary string or vector
+representation; it is also convenient to use @code{kbd}:
+
+@defmac kbd keyseq-text
+This macro converts the text @var{keyseq-text} (a string constant)
+into a key sequence (a string or vector constant). The contents
+of @var{keyseq-text} should describe the key sequence using the syntax
+used in this manual. More precisely, it uses the same syntax that
+Edit Macro mode uses for editing keyboard macros (@pxref{Edit Keyboard
+Macro,,, emacs, The GNU Emacs Manual}).
+
+@example
+(kbd "C-x") @result{} "\C-x"
+(kbd "C-x C-f") @result{} "\C-x\C-f"
+(kbd "C-x 4 C-f") @result{} "\C-x4\C-f"
+(kbd "X") @result{} "X"
+(kbd "RET") @result{} "\^M"
+(kbd "C-c SPC") @result{} "\C-c@ "
+(kbd "<f1> SPC") @result{} [f1 32]
+(kbd "C-M-<down>") @result{} [C-M-down]
+@end example
+@end defmac
+
@node Format of Keymaps
@section Format of Keymaps
@cindex format of keymaps
elements of the keymap is given @var{binding} as its binding. Default
bindings allow a keymap to bind all possible event types without having
to enumerate all of them. A keymap that has a default binding
-completely masks any lower-precedence keymap.
+completely masks any lower-precedence keymap, except for events
+explicitly bound to @code{nil} (see below).
@item @var{char-table}
If an element of a keymap is a char-table, it counts as holding
bindings. A keymap with such a char-table is called a @dfn{full
keymap}. Other keymaps are called @dfn{sparse keymaps}.
-When a keymap contains a char-table vector, it always defines a
-binding for each character without modifiers. However, if the binding
-is @code{nil}, it doesn't constitute a definition. @code{nil} takes
-precedence over a default binding or a binding in the parent keymap.
-So in a full keymap, default bindings are not meaningful for
-characters without modifiers. They can still apply to characters with
-modifier bits and to non-character events. A binding of @code{nil}
-does @emph{not} override lower-precedence keymaps; thus, if the local
-map gives a binding of @code{nil}, Emacs uses the binding from the
-global map.
-
@item @var{string}
@cindex keymap prompt string
@cindex overall prompt string
use the keymap as a menu. @xref{Defining Menus}.
@end table
+When the binding is @code{nil}, it doesn't constitute a definition
+but it does take precedence over a default binding or a binding in the
+parent keymap. On the other hand, a binding of @code{nil} does
+@emph{not} override lower-precedence keymaps; thus, if the local map
+gives a binding of @code{nil}, Emacs uses the binding from the
+global map.
+
@cindex meta characters lookup
Keymaps do not directly record bindings for the meta characters.
Instead, meta characters are regarded for purposes of key lookup as
@end group
@group
(keymap
- ;; @key{TAB}
- (9 . lisp-indent-line)
+ (3 keymap
+ ;; @kbd{C-c C-z}
+ (26 . run-lisp))
@end group
@group
- ;; @key{DEL}
- (127 . backward-delete-char-untabify)
+ (27 keymap
+ ;; @r{@kbd{M-C-x}, treated as @kbd{@key{ESC} C-x}}
+ (24 . lisp-send-defun)
+ keymap
+ ;; @r{@kbd{M-C-q}, treated as @kbd{@key{ESC} C-q}}
+ (17 . indent-sexp)))
@end group
@group
- (3 keymap
- ;; @kbd{C-c C-l}
- (12 . run-lisp))
+ ;; @r{This part is inherited from @code{lisp-mode-shared-map}.}
+ keymap
+ ;; @key{DEL}
+ (127 . backward-delete-char-untabify)
@end group
@group
(27 keymap
;; @r{@kbd{M-C-q}, treated as @kbd{@key{ESC} C-q}}
- (17 . indent-sexp)
- ;; @r{@kbd{M-C-x}, treated as @kbd{@key{ESC} C-x}}
- (24 . lisp-send-defun)))
+ (17 . indent-sexp))
+ (9 . lisp-indent-line))
@end group
@end example
Here we describe the functions for creating keymaps.
-@c ??? This should come after make-sparse-keymap
-@defun make-keymap &optional prompt
-This function creates and returns a new full keymap. That keymap
-contains a char-table (@pxref{Char-Tables}) with 384 slots: the first
-128 slots are for defining all the @acronym{ASCII} characters, the next 128
-slots are for 8-bit European characters, and each one of the final 128
-slots is for one character set of non-@acronym{ASCII} characters supported by
-Emacs. The new keymap initially binds all these characters to
-@code{nil}, and does not bind any other kind of event.
+@defun make-sparse-keymap &optional prompt
+This function creates and returns a new sparse keymap with no entries.
+(A sparse keymap is the kind of keymap you usually want.) The new
+keymap does not contain a char-table, unlike @code{make-keymap}, and
+does not bind any events.
@example
@group
-(make-keymap)
- @result{} (keymap [nil nil nil @dots{} nil nil])
+(make-sparse-keymap)
+ @result{} (keymap)
@end group
@end example
(@pxref{Defining Menus}).
@end defun
-@defun make-sparse-keymap &optional prompt
-This function creates and returns a new sparse keymap with no entries.
-The new keymap does not contain a char-table, unlike @code{make-keymap},
-and does not bind any events. The argument @var{prompt} specifies a
-prompt string, as in @code{make-keymap}.
+@defun make-keymap &optional prompt
+This function creates and returns a new full keymap. That keymap
+contains a char-table (@pxref{Char-Tables}) with slots for all
+characters without modifiers. The new keymap initially binds all
+these characters to @code{nil}, and does not bind any other kind of
+event. The argument @var{prompt} specifies a
+prompt string, as in @code{make-sparse-keymap}.
@example
@group
-(make-sparse-keymap)
- @result{} (keymap)
+(make-keymap)
+ @result{} (keymap #^[t nil nil nil @dots{} nil nil keymap])
@end group
@end example
+
+A full keymap is more efficient than a sparse keymap when it holds
+lots of bindings; for just a few, the sparse keymap is better.
@end defun
@defun copy-keymap keymap
key.
@item
-@cindex @kbd{M-g}
+@cindex @kbd{M-o}
@vindex facemenu-keymap
-@code{facemenu-keymap} is the global keymap used for the @kbd{M-g}
+@code{facemenu-keymap} is the global keymap used for the @kbd{M-o}
prefix key.
@c Emacs 19 feature
@item
-The other Emacs prefix keys are @kbd{C-x @@}, @kbd{C-x a i}, @kbd{C-x
-@key{ESC}} and @kbd{@key{ESC} @key{ESC}}. They use keymaps that have no
-special names.
+The other Emacs prefix keys are @kbd{M-g}, @kbd{C-x @@}, @kbd{C-x a i},
+@kbd{C-x @key{ESC}} and @kbd{@key{ESC} @key{ESC}}. They use keymaps
+that have no special names.
@end itemize
The keymap binding of a prefix key is used for looking up the event
@defun define-prefix-command symbol &optional mapvar prompt
@cindex prefix command
+@anchor{Definition of define-prefix-command}
This function prepares @var{symbol} for use as a prefix key's binding:
it creates a sparse keymap and stores it as @var{symbol}'s function
definition. Subsequently binding a key sequence to @var{symbol} will
@cindex global keymap
@cindex local keymap
- Emacs normally contains many keymaps; at any given time, just a few of
-them are @dfn{active} in that they participate in the interpretation
-of user input. These are the global keymap, the current buffer's
-local keymap, and the keymaps of any enabled minor modes.
+ Emacs normally contains many keymaps; at any given time, just a few
+of them are @dfn{active}, meaning that they participate in the
+interpretation of user input. All the active keymaps are used
+together to determine what command to execute when a key is entered.
+Emacs searches these keymaps one by one, in a standard order, until it
+finds a binding in one of the keymaps.
+
+ Normally the active keymaps are the @code{keymap} property keymap,
+the keymaps of any enabled minor modes, the current buffer's local
+keymap, and the global keymap, in that order. Therefore, Emacs
+searches for each input key sequence in all these keymaps. Here is a
+pseudo-Lisp description of how this process works:
+
+@lisp
+(or (if overriding-terminal-local-map
+ (@var{find-in} overriding-terminal-local-map)
+ (if overriding-local-map
+ (@var{find-in} overriding-local-map)
+ (or (@var{find-in} (get-text-property (point) 'keymap))
+ (@var{find-in-any} emulation-mode-map-alists)
+ (@var{find-in-any} minor-mode-overriding-map-alist)
+ (@var{find-in-any} minor-mode-map-alist)
+ (if (get-text-property (point) 'local-map))
+ (@var{find-in} (get-text-property (point) 'local-map))
+ (@var{find-in} (current-local-map))))))
+ (@var{find-in} (current-global-map)))
+@end lisp
+
+@noindent
+Here, the pseudo-function @var{find-in} means to look up the key
+sequence in a single map, and @var{find-in-any} means to search the
+appropriate keymaps from an alist. (Searching a single keymap for a
+binding is called @dfn{key lookup}; see @ref{Key Lookup}.)
The @dfn{global keymap} holds the bindings of keys that are defined
regardless of the current buffer, such as @kbd{C-f}. The variable
@code{global-map} holds this keymap, which is always active.
- Each buffer may have another keymap, its @dfn{local keymap}, which may
-contain new or overriding definitions for keys. The current buffer's
-local keymap is always active except when @code{overriding-local-map}
-overrides it. Text properties can specify an alternative local map for
-certain parts of the buffer; see @ref{Special Properties}.
+ Each buffer may have another keymap, its @dfn{local keymap}, which
+may contain new or overriding definitions for keys. The current
+buffer's local keymap is always active except when
+@code{overriding-local-map} overrides it. The @code{local-map} text
+or overlay property can specify an alternative local keymap for certain
+parts of the buffer; see @ref{Special Properties}.
Each minor mode can have a keymap; if it does, the keymap is active
-when the minor mode is enabled.
-
- The variable @code{overriding-local-map}, if non-@code{nil}, specifies
-another local keymap that overrides the buffer's local map and all the
-minor mode keymaps. Modes for emulation can specify additional
-active keymaps through the variable @code{emulation-mode-map-alists}.
-
- All the active keymaps are used together to determine what command to
-execute when a key is entered. Emacs searches these maps one by one, in
-order of decreasing precedence, until it finds a binding in one of the
-maps. The procedure for searching a single keymap is called @dfn{key
-lookup}; see @ref{Key Lookup}.
-
- Normally, Emacs first searches for the key in the minor mode maps, in
-the order specified by @code{minor-mode-map-alist}; if they do not
-supply a binding for the key, Emacs searches the local map; if that too
-has no binding, Emacs then searches the global map. However, if
-@code{overriding-local-map} is non-@code{nil}, Emacs searches that map
-first, before the global map.
+when the minor mode is enabled. Modes for emulation can specify
+additional active keymaps through the variable
+@code{emulation-mode-map-alists}.
+
+ The highest precedence normal keymap comes from the @code{keymap}
+text or overlay property. If that is non-@code{nil}, it is the first
+keymap to be processed, in normal circumstances.
+
+ However, there are also special ways for programs to substitute
+other keymaps for some of those. The variable
+@code{overriding-local-map}, if non-@code{nil}, specifies a keymap
+that replaces all the usual active keymaps except the global keymap.
+Another way to do this is with @code{overriding-terminal-local-map};
+it operates on a per-terminal basis. These variables are documented
+below.
@cindex major mode keymap
Since every buffer that uses the same major mode normally uses the
example) is seen also in the other buffers that share that keymap.
The local keymaps that are used for Lisp mode and some other major
-modes exist even if they have not yet been used. These local maps are
+modes exist even if they have not yet been used. These local keymaps are
the values of variables such as @code{lisp-mode-map}. For most major
modes, which are less frequently used, the local keymap is constructed
only when the mode is used for the first time in a session.
@xref{Standard Keymaps}, for a list of standard keymaps.
+@defun current-active-maps &optional olp
+This returns the list of active keymaps that would be used by the
+command loop in the current circumstances to look up a key sequence.
+Normally it ignores @code{overriding-local-map} and
+@code{overriding-terminal-local-map}, but if @var{olp} is
+non-@code{nil} then it pays attention to them.
+@end defun
+
+@defun key-binding key &optional accept-defaults no-remap
+This function returns the binding for @var{key} according to the
+current active keymaps. The result is @code{nil} if @var{key} is
+undefined in the keymaps.
+
+@c Emacs 19 feature
+The argument @var{accept-defaults} controls checking for default
+bindings, as in @code{lookup-key} (above).
+
+When commands are remapped (@pxref{Remapping Commands}),
+@code{key-binding} normally processes command remappings so as to
+returns the remapped command that will actually be executed. However,
+if @var{no-remap} is non-@code{nil}, @code{key-binding} ignores
+remappings and returns the binding directly specified for @var{key}.
+
+An error is signaled if @var{key} is not a string or a vector.
+
+@example
+@group
+(key-binding "\C-x\C-f")
+ @result{} find-file
+@end group
+@end example
+@end defun
+
+@node Searching Keymaps
+@section Searching the Active Keymaps
+
+ After translation of the input events (@pxref{Translating Input})
+Emacs looks for them in the active keymaps. Here is a pseudo-Lisp
+description of the order in which the active keymaps are searched:
+
+@lisp
+(or (if overriding-terminal-local-map
+ (@var{find-in} overriding-terminal-local-map)
+ (if overriding-local-map
+ (@var{find-in} overriding-local-map)
+ (or (@var{find-in} (get-text-property (point) 'keymap))
+ (@var{find-in-any} emulation-mode-map-alists)
+ (@var{find-in-any} minor-mode-overriding-map-alist)
+ (@var{find-in-any} minor-mode-map-alist)
+ (@var{find-in} (get-text-property (point) 'local-map))
+ (@var{find-in} (current-local-map)))))
+ (@var{find-in} (current-global-map)))
+@end lisp
+
+@noindent
+The @var{find-in} and @var{find-in-any} are pseudo functions that
+searches in one keymap respectively an alist of keymaps.
+
+@enumerate
+@item
+The function finally found may be remapped
+(@pxref{Remapping Commands}).
+
+@item
+Characters that are bound to @code{self-insert-command} are translated
+according to @code{translation-table-for-input} before insertion.
+
+@item
+@code{current-active-maps} returns a list of the
+currently active keymaps at point.
+
+@item
+When a match is found (@pxref{Key Lookup}), if the binding in the
+keymap is a function, the search is over. However if the keymap entry
+is a symbol with a value or a string, Emacs replaces the input key
+sequences with the variable's value or the string, and restarts the
+search of the active keymaps.
+@end enumerate
+
+@node Controlling Active Maps
+@section Controlling the Active Keymaps
+
@defvar global-map
This variable contains the default global keymap that maps Emacs
-keyboard input to commands. The global keymap is normally this keymap.
-The default global keymap is a full keymap that binds
+keyboard input to commands. The global keymap is normally this
+keymap. The default global keymap is a full keymap that binds
@code{self-insert-command} to all of the printing characters.
-It is normal practice to change the bindings in the global map, but you
+It is normal practice to change the bindings in the global keymap, but you
should not assign this variable any value other than the keymap it starts
out with.
@end defvar
@c Emacs 19 feature
@defvar minor-mode-map-alist
+@anchor{Definition of minor-mode-map-alist}
This variable is an alist describing keymaps that may or may not be
active according to the values of certain variables. Its elements look
like this:
not do. The @sc{cdr} can be either a keymap (a list) or a symbol whose
function definition is a keymap.
-When more than one minor mode keymap is active, their order of priority
-is the order of @code{minor-mode-map-alist}. But you should design
+When more than one minor mode keymap is active, the earlier one in
+@code{minor-mode-map-alist} takes priority. But you should design
minor modes so that they don't interfere with each other. If you do
this properly, the order will not matter.
@defvar overriding-local-map
If non-@code{nil}, this variable holds a keymap to use instead of the
-buffer's local keymap and instead of all the minor mode keymaps. This
-keymap, if any, overrides all other maps that would have been active,
-except for the current global map.
+buffer's local keymap, any text property or overlay keymaps, and any
+minor mode keymaps. This keymap, if specified, overrides all other
+maps that would have been active, except for the current global map.
@end defvar
@defvar overriding-terminal-local-map
If non-@code{nil}, this variable holds a keymap to use instead of
-@code{overriding-local-map}, the buffer's local keymap and all the minor
-mode keymaps.
+@code{overriding-local-map}, the buffer's local keymap, text property
+or overlay keymaps, and all the minor mode keymaps.
This variable is always local to the current terminal and cannot be
buffer-local. @xref{Multiple Displays}. It is used to implement
@cindex keymap entry
@dfn{Key lookup} is the process of finding the binding of a key
-sequence from a given keymap. Actual execution of the binding is not
-part of key lookup.
+sequence from a given keymap. The execution or use of the binding is
+not part of key lookup.
Key lookup uses just the event type of each event in the key sequence;
the rest of the event is ignored. In fact, a key sequence used for key
-lookup may designate mouse events with just their types (symbols)
-instead of with entire mouse events (lists). @xref{Input Events}. Such
-a ``key-sequence'' is insufficient for @code{command-execute} to run,
+lookup may designate a mouse event with just its types (a symbol)
+instead of the entire event (a list). @xref{Input Events}. Such
+a ``key sequence'' is insufficient for @code{command-execute} to run,
but it is sufficient for looking up or rebinding a key.
When the key sequence consists of multiple events, key lookup
@item
@cindex @code{lambda} in keymap
If the @sc{car} of @var{list} is @code{lambda}, then the list is a
-lambda expression. This is presumed to be a command, and is treated as
-such (see above).
+lambda expression. This is presumed to be a function, and is treated
+as such (see above). In order to execute properly as a key binding,
+this function must be a command---it must have an @code{interactive}
+specification. @xref{Defining Commands}.
@item
If the @sc{car} of @var{list} is a keymap and the @sc{cdr} is an event
@result{} find-file
@end group
@group
+(lookup-key (current-global-map) (kbd "C-x C-f"))
+ @result{} find-file
+@end group
+@group
(lookup-key (current-global-map) "\C-x\C-f12345")
@result{} 2
@end group
not cause an error.
@end deffn
-@defun key-binding key &optional accept-defaults no-remap
-This function returns the binding for @var{key} in the current
-keymaps, trying all the active keymaps. The result is @code{nil} if
-@var{key} is undefined in the keymaps.
-
-@c Emacs 19 feature
-The argument @var{accept-defaults} controls checking for default
-bindings, as in @code{lookup-key} (above).
-
-When commands are remapped (@pxref{Remapping Commands}),
-@code{key-binding} normally processes command remappings so as to
-returns the remapped command that will actually be executed. However,
-if @var{no-remap} is non-@code{nil}, @code{key-binding} ignores
-remappings and returns the binding directly specified for @var{key}.
-
-An error is signaled if @var{key} is not a string or a vector.
-
-@example
-@group
-(key-binding "\C-x\C-f")
- @result{} find-file
-@end group
-@end example
-@end defun
-
-@defun current-active-maps
-This returns the list of keymaps that would be used by the command
-loop in the current circumstances to look up a key sequence.
-@end defun
-
@defun local-key-binding key &optional accept-defaults
This function returns the binding for @var{key} in the current
local keymap, or @code{nil} if it is undefined there.
@defvar meta-prefix-char
@cindex @key{ESC}
-This variable is the meta-prefix character code. It is used when
+This variable is the meta-prefix character code. It is used for
translating a meta character to a two-character sequence so it can be
-looked up in a keymap. For useful results, the value should be a prefix
-event (@pxref{Prefix Keys}). The default value is 27, which is the
-@acronym{ASCII} code for @key{ESC}.
+looked up in a keymap. For useful results, the value should be a
+prefix event (@pxref{Prefix Keys}). The default value is 27, which is
+the @acronym{ASCII} code for @key{ESC}.
As long as the value of @code{meta-prefix-char} remains 27, key lookup
translates @kbd{M-b} into @kbd{@key{ESC} b}, which is normally defined
@code{C-H-left}. One advantage of such lists is that the precise
numeric codes for the modifier bits don't appear in compiled files.
- For the functions below, an error is signaled if @var{keymap} is not a
-keymap or if @var{key} is not a string or vector representing a key
+ For the functions below, an error is signaled if @var{keymap} is not
+a keymap or if @var{key} is not a string or vector representing a key
sequence. You can use event types (symbols) as shorthand for events
-that are lists.
+that are lists. The @code{kbd} macro (@pxref{Keymap Terminology}) is
+a convenient way to specify the key sequence.
@defun define-key keymap key binding
This function sets the binding for @var{key} in @var{keymap}. (If
@group
;; @r{Build sparse submap for @kbd{C-x} and bind @kbd{f} in that.}
-(define-key map "\C-xf" 'forward-word)
+(define-key map (kbd "C-x f") 'forward-word)
@result{} forward-word
@end group
@group
@group
;; @r{Bind @kbd{C-p} to the @code{ctl-x-map}.}
-(define-key map "\C-p" ctl-x-map)
+(define-key map (kbd "C-p") ctl-x-map)
;; @code{ctl-x-map}
@result{} [nil @dots{} find-file @dots{} backward-kill-sentence]
@end group
@group
;; @r{Bind @kbd{C-f} to @code{foo} in the @code{ctl-x-map}.}
-(define-key map "\C-p\C-f" 'foo)
+(define-key map (kbd "C-p C-f") 'foo)
@result{} 'foo
@end group
@group
default global map.
The function @code{substitute-key-definition} scans a keymap for
-keys that have a certain binding and rebind them with a different
-binding. Another feature you can use for similar effects, but which
-is often cleaner, is to add a binding that remaps a command
-(@pxref{Remapping Commands}).
+keys that have a certain binding and rebinds them with a different
+binding. Another feature which is cleaner and can often produce the
+same results to remap one command into another (@pxref{Remapping
+Commands}).
@defun substitute-key-definition olddef newdef keymap &optional oldmap
@cindex replace bindings
@defun suppress-keymap keymap &optional nodigits
@cindex @code{self-insert-command} override
This function changes the contents of the full keymap @var{keymap} by
-making all the printing characters undefined. More precisely, it binds
-them to the command @code{undefined}. This makes ordinary insertion of
-text impossible. @code{suppress-keymap} returns @code{nil}.
+remapping @code{self-insert-command} to the command @code{undefined}
+(@pxref{Remapping Commands}). This has the effect of undefining all
+printing characters, thus making ordinary insertion of text impossible.
+@code{suppress-keymap} returns @code{nil}.
If @var{nodigits} is @code{nil}, then @code{suppress-keymap} defines
digits to run @code{digit-argument}, and @kbd{-} to run
instead of @code{kill-line} and @code{kill-word}. It can establish
this by making these two command-remapping bindings in its keymap:
-@example
+@smallexample
(define-key my-mode-map [remap kill-line] 'my-kill-line)
(define-key my-mode-map [remap kill-word] 'my-kill-word)
-@end example
+@end smallexample
Whenever @code{my-mode-map} is an active keymap, if the user types
@kbd{C-k}, Emacs will find the standard global binding of
@code{kill-line} (assuming nobody has changed it). But
-@code{my-mode-map} remaps @code{kill-line} to @code{my-mode-map},
+@code{my-mode-map} remaps @code{kill-line} to @code{my-kill-line},
so instead of running @code{kill-line}, Emacs runs
@code{my-kill-line}.
Remapping only works through a single level. In other words,
-@example
+@smallexample
(define-key my-mode-map [remap kill-line] 'my-kill-line)
(define-key my-mode-map [remap my-kill-line] 'my-other-kill-line)
-@end example
+@end smallexample
@noindent
does not have the effect of remapping @code{kill-line} into
-@code{my-other-kill-line}. If an ordinary key binding specifies
+@code{my-other-kill-line}. If an ordinary key binding specifies
@code{kill-line}, this keymap will remap it to @code{my-kill-line};
if an ordinary binding specifies @code{my-kill-line}, this keymap will
remap it to @code{my-other-kill-line}.
@defun command-remapping command
-This function returns the remapping for @var{command}, given the
-current active keymaps. If @var{command} is not remapped (which is
-the usual situation), the function returns @code{nil}.
+This function returns the remapping for @var{command} (a symbol),
+given the current active keymaps. If @var{command} is not remapped
+(which is the usual situation), or not a symbol, the function returns
+@code{nil}.
@end defun
@node Key Binding Commands
(@pxref{Init File}) for simple customization. For example,
@smallexample
-(global-set-key "\C-x\C-\\" 'next-line)
+(global-set-key (kbd "C-x C-\\") 'next-line)
@end smallexample
@noindent
@end smallexample
@noindent
-redefines the first (leftmost) mouse button, typed with the Meta key, to
+redefines the first (leftmost) mouse button, entered with the Meta key, to
set point where you click.
@cindex non-@acronym{ASCII} text in keybindings
Latin-1 character with code 246 (@kbd{M-v}). In order to use this
binding, you need to enter the multibyte Latin-1 character as keyboard
input. One way to do this is by using an appropriate input method
-(@pxref{Input Methods, , Input Methods, emacs,The GNU Emacs Manual}).
+(@pxref{Input Methods, , Input Methods, emacs, The GNU Emacs Manual}).
If you want to use a unibyte character in the key binding, you can
construct the key sequence string using @code{multibyte-char-to-unibyte}
or @code{string-make-unibyte} (@pxref{Converting Representations}).
-@deffn Command global-set-key key definition
+@deffn Command global-set-key key binding
This function sets the binding of @var{key} in the current global map
-to @var{definition}.
+to @var{binding}.
@smallexample
@group
-(global-set-key @var{key} @var{definition})
+(global-set-key @var{key} @var{binding})
@equiv{}
-(define-key (current-global-map) @var{key} @var{definition})
+(define-key (current-global-map) @var{key} @var{binding})
@end group
@end smallexample
@end deffn
@end smallexample
@end deffn
-@deffn Command local-set-key key definition
+@deffn Command local-set-key key binding
This function sets the binding of @var{key} in the current local
-keymap to @var{definition}.
+keymap to @var{binding}.
@smallexample
@group
-(local-set-key @var{key} @var{definition})
+(local-set-key @var{key} @var{binding})
@equiv{}
-(define-key (current-local-map) @var{key} @var{definition})
+(define-key (current-local-map) @var{key} @var{binding})
@end group
@end smallexample
@end deffn
@var{keymap} is @var{map}.
The elements of the alist are ordered so that the @var{key} increases
-in length. The first element is always @code{("" .@: @var{keymap})},
+in length. The first element is always @code{([] .@: @var{keymap})},
because the specified keymap is accessible from itself with a prefix of
no events.
@smallexample
@group
(accessible-keymaps (current-local-map))
-@result{}(("" keymap
+@result{}(([] keymap
(27 keymap ; @r{Note this keymap for @key{ESC} is repeated below.}
(83 . center-paragraph)
(115 . center-line))
@smallexample
@group
(accessible-keymaps (current-global-map))
-@result{} (("" keymap [set-mark-command beginning-of-line @dots{}
+@result{} (([] keymap [set-mark-command beginning-of-line @dots{}
delete-backward-char])
@end group
@group
for each binding in @var{keymap}. It passes two arguments,
the event type and the value of the binding. If @var{keymap}
has a parent, the parent's bindings are included as well.
+This works recursively: if the parent has itself a parent, then the
+grandparent's bindings are also included and so on.
This function is the cleanest way to examine all the bindings
in a keymap.
@defun where-is-internal command &optional keymap firstonly noindirect no-remap
This function is a subroutine used by the @code{where-is} command
(@pxref{Help, , Help, emacs,The GNU Emacs Manual}). It returns a list
-of key sequences (of any length) that are bound to @var{command} in a
+of all key sequences (of any length) that are bound to @var{command} in a
set of keymaps.
The argument @var{command} can be any object; it is compared with all
If @var{keymap} is @code{nil}, then the maps used are the current active
keymaps, disregarding @code{overriding-local-map} (that is, pretending
-its value is @code{nil}). If @var{keymap} is non-@code{nil}, then the
+its value is @code{nil}). If @var{keymap} is a keymap, then the
maps searched are @var{keymap} and the global keymap. If @var{keymap}
is a list of keymaps, only those keymaps are searched.
@code{(keymap)} (an empty keymap) as @var{keymap}.
If @var{firstonly} is @code{non-ascii}, then the value is a single
-string representing the first key sequence found, rather than a list of
+vector representing the first key sequence found, rather than a list of
all possible key sequences. If @var{firstonly} is @code{t}, then the
value is the first key sequence, except that key sequences consisting
entirely of @acronym{ASCII} characters (or meta variants of @acronym{ASCII}
-characters) are preferred to all other key sequences.
+characters) are preferred to all other key sequences and that the
+return value can never be a menu binding.
If @var{noindirect} is non-@code{nil}, @code{where-is-internal} doesn't
follow indirect keymap bindings. This makes it possible to search for
@end smallexample
@end defun
-@deffn Command describe-bindings &optional prefix
+@deffn Command describe-bindings &optional prefix buffer-or-name
This function creates a listing of all current key bindings, and
displays it in a buffer named @samp{*Help*}. The text is grouped by
modes---minor modes first, then the major mode, then global bindings.
@kbd{~} is @acronym{ASCII} 126, and the characters between them include all
the normal printing characters, (e.g., letters, digits, punctuation,
etc.@:); all these characters are bound to @code{self-insert-command}.
+
+If @var{buffer-or-name} is non-@code{nil}, it should be a buffer or a
+buffer name. Then @code{describe-bindings} lists that buffer's bindings,
+instead of the current buffer's.
@end deffn
@node Menu Keymaps
The easiest way to construct a keymap with a prompt string is to specify
the string as an argument when you call @code{make-keymap},
-@code{make-sparse-keymap} or @code{define-prefix-command}
-(@pxref{Creating Keymaps}).
+@code{make-sparse-keymap} (@pxref{Creating Keymaps}), or
+@code{define-prefix-command} (@pxref{Definition of define-prefix-command}).
+
@defun keymap-prompt keymap
This function returns the overall prompt string of @var{keymap},
describe the action of the command it corresponds to. Note that it is
not generally possible to display non-@acronym{ASCII} text in menus. It will
work for keyboard menus and will work to a large extent when Emacs is
-built with Gtk+ support.@footnote{In this case, the text is first
+built with the Gtk+ toolkit.@footnote{In this case, the text is first
encoded using the @code{utf-8} coding system and then rendered by the
toolkit as it sees fit.}
The property value @var{filter-fn} should be a function of one argument;
when it is called, its argument will be @var{real-binding}. The
function should return the binding to use instead.
+
+Emacs can call this function at any time that it does redisplay or
+operates on menu data structures, so you should write it so it can
+safely be called at any time.
@end table
@node Menu Separators
@cindex menu separators
A menu separator is a kind of menu item that doesn't display any
-text--instead, it divides the menu into subparts with a horizontal line.
+text---instead, it divides the menu into subparts with a horizontal line.
A separator looks like this in the menu keymap:
@example
That specifies the default kind of separator. (For compatibility,
@code{""} and @code{-} also count as separators.)
- Starting in Emacs 21, certain other values of @var{separator-type}
-specify a different style of separator. Here is a table of them:
+ Certain other values of @var{separator-type} specify a different
+style of separator. Here is a table of them:
@table @code
@item "--no-line"
special about @samp{@@} at the beginning of an item string is that the
@samp{@@} doesn't appear in the menu item.
- You can also produce multiple panes or submenus from separate keymaps.
-The full definition of a prefix key always comes from merging the
-definitions supplied by the various active keymaps (minor mode, local,
-and global). When more than one of these keymaps is a menu, each of
-them makes a separate pane or panes (when Emacs does not use an
-X-toolkit) or a separate submenu (when using an X-toolkit).
-@xref{Active Keymaps}.
+ Multiple keymaps that define the same menu prefix key produce
+separate panes or separate submenus.
@node Keyboard Menus
@subsection Menus and the Keyboard
@cindex menu definition example
Here is a complete example of defining a menu keymap. It is the
-definition of the @samp{Print} submenu in the @samp{Tools} menu in the
-menu bar, and it uses the simple menu item format (@pxref{Simple Menu
-Items}). First we create the keymap, and give it a name:
+definition of the @samp{Replace} submenu in the @samp{Edit} menu in
+the menu bar, and it uses the extended menu item format
+(@pxref{Extended Menu Items}). First we create the keymap, and give
+it a name:
-@example
-(defvar menu-bar-print-menu (make-sparse-keymap "Print"))
-@end example
+@smallexample
+(defvar menu-bar-replace-menu (make-sparse-keymap "Replace"))
+@end smallexample
@noindent
Next we define the menu items:
-@example
-(define-key menu-bar-print-menu [ps-print-region]
- '("Postscript Print Region" . ps-print-region-with-faces))
-(define-key menu-bar-print-menu [ps-print-buffer]
- '("Postscript Print Buffer" . ps-print-buffer-with-faces))
-(define-key menu-bar-print-menu [separator-ps-print]
- '("--"))
-(define-key menu-bar-print-menu [print-region]
- '("Print Region" . print-region))
-(define-key menu-bar-print-menu [print-buffer]
- '("Print Buffer" . print-buffer))
-@end example
+@smallexample
+(define-key menu-bar-replace-menu [tags-repl-continue]
+ '(menu-item "Continue Replace" tags-loop-continue
+ :help "Continue last tags replace operation"))
+(define-key menu-bar-replace-menu [tags-repl]
+ '(menu-item "Replace in tagged files" tags-query-replace
+ :help "Interactively replace a regexp in all tagged files"))
+(define-key menu-bar-replace-menu [separator-replace-tags]
+ '(menu-item "--"))
+;; @r{@dots{}}
+@end smallexample
@noindent
Note the symbols which the bindings are ``made for''; these appear
when the user selects from the menu, and they appear in the output of
@code{where-is} and @code{apropos}.
+ The menu in this example is intended for use with the mouse. If a
+menu is intended for use with the keyboard, that is, if it is bound to
+a key sequence ending with a keyboard event, then the menu items
+should be bound to characters or ``real'' function keys, that can be
+typed with the keyboard.
+
The binding whose definition is @code{("--")} is a separator line.
Like a real menu item, the separator has a key symbol, in this case
-@code{separator-ps-print}. If one menu has two separators, they must
-have two different key symbols.
-
- Here is code to define enable conditions for two of the commands in
-the menu:
-
-@example
-(put 'print-region 'menu-enable 'mark-active)
-(put 'ps-print-region-with-faces 'menu-enable 'mark-active)
-@end example
+@code{separator-replace-tags}. If one menu has two separators, they
+must have two different key symbols.
Here is how we make this menu appear as an item in the parent menu:
@example
-(define-key menu-bar-tools-menu [print]
- (cons "Print" menu-bar-print-menu))
+(define-key menu-bar-edit-menu [replace]
+ (list 'menu-item "Replace" menu-bar-replace-menu))
@end example
@noindent
Note that this incorporates the submenu keymap, which is the value of
-the variable @code{menu-bar-print-menu}, rather than the symbol
-@code{menu-bar-print-menu} itself. Using that symbol in the parent menu
-item would be meaningless because @code{menu-bar-print-menu} is not a
-command.
+the variable @code{menu-bar-replace-menu}, rather than the symbol
+@code{menu-bar-replace-menu} itself. Using that symbol in the parent
+menu item would be meaningless because @code{menu-bar-replace-menu} is
+not a command.
- If you wanted to attach the same print menu to a mouse click, you
+ If you wanted to attach the same replace menu to a mouse click, you
can do it this way:
@example
(define-key global-map [C-S-down-mouse-1]
- menu-bar-print-menu)
-@end example
-
- We could equally well use an extended menu item (@pxref{Extended Menu
-Items}) for @code{print-region}, like this:
-
-@example
-(define-key menu-bar-print-menu [print-region]
- '(menu-item "Print Region" print-region
- :enable mark-active))
-@end example
-
-@noindent
-With the extended menu item, the enable condition is specified
-inside the menu item itself. If we wanted to make this
-item disappear from the menu entirely when the mark is inactive,
-we could do it this way:
-
-@example
-(define-key menu-bar-print-menu [print-region]
- '(menu-item "Print Region" print-region
- :visible mark-active))
+ menu-bar-replace-menu)
@end example
@node Menu Bar
Most window systems allow each frame to have a @dfn{menu bar}---a
permanently displayed menu stretching horizontally across the top of the
frame. The items of the menu bar are the subcommands of the fake
-``function key'' @code{menu-bar}, as defined by all the active keymaps.
+``function key'' @code{menu-bar}, as defined in the active keymaps.
To add an item to the menu bar, invent a fake ``function key'' of your
own (let's call it @var{key}), and make a binding for the key sequence
parameter must be greater than zero. Emacs uses just one line for the
menu bar itself; if you specify more than one line, the other lines
serve to separate the menu bar from the windows in the frame. We
-recommend 1 or 2 as the value of @code{menu-bar-lines}. @xref{Window Frame
+recommend 1 or 2 as the value of @code{menu-bar-lines}. @xref{Layout
Parameters}.
Here's an example of setting up a menu bar item:
@end defvar
@defvar menu-bar-update-hook
-This normal hook is run whenever the user clicks on the menu bar, before
-displaying a submenu. You can use it to update submenus whose contents
-should vary.
+This normal hook is run by redisplay to update the menu bar contents,
+before redisplaying the menu bar. You can use it to update submenus
+whose contents should vary. Since this hook is run frequently, we
+advise you to ensure that the functions it calls do not take much time
+in the usual case.
@end defvar
@node Tool Bar
A @dfn{tool bar} is a row of icons at the top of a frame, that execute
commands when you click on them---in effect, a kind of graphical menu
-bar. Emacs supports tool bars starting with version 21.
+bar.
The frame parameter @code{tool-bar-lines} (X resource @samp{toolBar})
controls how many lines' worth of height to reserve for the tool bar. A
@tindex tool-bar-add-item
This function adds an item to the tool bar by modifying
@code{tool-bar-map}. The image to use is defined by @var{icon}, which
-is the base name of an XPM, XBM or PBM image file to located by
+is the base name of an XPM, XBM or PBM image file to be located by
@code{find-image}. Given a value @samp{"exit"}, say, @file{exit.xpm},
@file{exit.pbm} and @file{exit.xbm} would be searched for in that order
on a color display. On a monochrome display, the search order is
prefix keymap. The remaining arguments @var{props} are additional
property list elements to add to the menu item specification.
-To define items in some local map, bind @code{`tool-bar-map} with
+To define items in some local map, bind @code{tool-bar-map} with
@code{let} around calls of this function:
@example
(defvar foo-tool-bar-map
This function is used for making non-global tool bar items. Use it
like @code{tool-bar-add-item-from-menu} except that @var{in-map}
specifies the local map to make the definition in. The argument
-@var{from-map} si like the @var{map} argument of
+@var{from-map} is like the @var{map} argument of
@code{tool-bar-add-item-from-menu}.
@end defun
frame's height.
@end defvar
-@tindex auto-raise-tool-bar-items
-@defvar auto-raise-tool-bar-items
+@tindex auto-raise-tool-bar-buttons
+@defvar auto-raise-tool-bar-buttons
If this variable is non-@code{nil}, tool bar items display
in raised form when the mouse moves over them.
@end defvar
-@tindex tool-bar-item-margin
-@defvar tool-bar-item-margin
+@tindex tool-bar-button-margin
+@defvar tool-bar-button-margin
This variable specifies an extra margin to add around tool bar items.
-The value is an integer, a number of pixels. The default is 1.
+The value is an integer, a number of pixels. The default is 4.
@end defvar
-@tindex tool-bar-item-relief
-@defvar tool-bar-item-relief
+@tindex tool-bar-button-relief
+@defvar tool-bar-button-relief
This variable specifies the shadow width for tool bar items.
-The value is an integer, a number of pixels. The default is 3.
+The value is an integer, a number of pixels. The default is 1.
+@end defvar
+
+@tindex tool-bar-border
+@defvar tool-bar-border
+This variable specifies the height of the border drawn below the tool
+bar area. An integer value specifies height as a number of pixels.
+If the value is one of @code{internal-border-width} (the default) or
+@code{border-width}, the tool bar border height corresponds to the
+corresponding frame parameter.
@end defvar
You can define a special meaning for clicking on a tool bar item with