* Key Lookup:: How extracting elements from keymaps works.
* 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.
* Key Binding Commands:: Interactive interfaces for redefining keys.
* Scanning Keymaps:: Looking through all keymaps, for printing help.
* Menu Keymaps:: Defining a menu as a keymap.
to enumerate all of them. A keymap that has a default binding
completely masks any lower-precedence keymap.
-@item @var{vector}
-If an element of a keymap is a vector, the vector counts as bindings for
-all the @sc{ascii} characters, codes 0 through 127; vector element
-@var{n} is the binding for the character with code @var{n}. This is a
-compact way to record lots of bindings. A keymap with such a vector is
-called a @dfn{full keymap}. Other keymaps are called @dfn{sparse
-keymaps}.
-
-A @code{nil} binding is used to mean that a key is explicitly not bound.
-Just like any other binding, it takes precedence over a default binding
-or a binding in the parent keymap, but on the other hand, it does not
-take precedence over keymaps of lower priority.
-
-When a keymap contains a vector, it always defines a binding for each
-@sc{ascii} character, even if the vector contains @code{nil} for that
-character. Such a binding of @code{nil} overrides any default key
-binding in the keymap, for @sc{ascii} characters. However, default
-bindings are still meaningful for events other than @sc{ascii}
-characters. 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{char-table}
+If an element of a keymap is a char-table, it counts as holding
+bindings for all character events with no modifier bits
+(@pxref{modifier bits}): element @var{n} is the binding for the
+character with code @var{n}. This is a compact way to record lots of
+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
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.
+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
event is run directly by @code{read-event}. @xref{Special Events}.
@end defvar
+@defvar emulation-mode-map-alists
+This variable holds a list of keymap alists to use for emulations
+modes. It is intended for modes or packages using multiple minor-mode
+keymaps. Each element is a keymap alist which has the same format and
+meaning as @code{minor-mode-map-alist}, or a symbol with a variable
+binding which is such an alist. The ``active'' keymaps in each alist
+are used before @code{minor-mode-map-alist} and
+@code{minor-mode-overriding-map-alist}.
+@end defvar
+
@node Key Lookup
@section Key Lookup
@cindex key lookup
not cause an error.
@end deffn
-@defun key-binding key &optional accept-defaults
+@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.
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
changing the bindings of both @kbd{C-p C-f} and @kbd{C-x C-f} in the
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}).
+
@defun substitute-key-definition olddef newdef keymap &optional oldmap
@cindex replace bindings
This function replaces @var{olddef} with @var{newdef} for any keys in
puts the special deletion command in @code{my-map} for whichever keys
are globally bound to the standard deletion command.
-@ignore
-@c Emacs 18 only
-Prefix keymaps that appear within @var{keymap} are not checked
-recursively for keys bound to @var{olddef}; they are not changed at all.
-Perhaps it would be better to check nested keymaps recursively.
-@end ignore
-
Here is an example showing a keymap before and after substitution:
@smallexample
@end smallexample
@end defun
+@node Remapping Commands
+@section Remapping Commands
+@cindex remapping commands
+
+ A special kind of key binding, using a special ``key sequence''
+which includes a command name, has the effect of @dfn{remapping} that
+command into another. Here's how it works. You make a key binding
+for a key sequence tha starts with the dummy event @code{remap},
+followed by the command name you want to remap. Specify the remapped
+definition as the definition in this binding. The remapped definition
+is usually a command name, but it can be any valid definition for
+a key binding.
+
+ Here's an example. Suppose that My mode uses special commands
+@code{my-kill-line} and @code{my-kill-word}, which should be invoked
+instead of @code{kill-line} and @code{kill-word}. It can establish
+this by making these two command-remapping bindings in its keymap:
+
+@example
+(define-key my-mode-map [remap kill-line] 'my-kill-line)
+(define-key my-mode-map [remap kill-word] 'my-kill-word)
+@end example
+
+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},
+so instead of running @code{kill-line}, Emacs runs
+@code{my-kill-line}.
+
+Remapping only works through a single level. In other words,
+
+@example
+(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
+
+@noindent
+does not have the effect of remapping @code{kill-line} into
+@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}.
+@end defun
+
@node Key Binding Commands
@section Commands for Binding Keys
in a keymap.
@end defun
-@defun where-is-internal command &optional keymap firstonly noindirect
+@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
follow indirect keymap bindings. This makes it possible to search for
an indirect definition itself.
+When command remapping is in effect (@pxref{Remapping Commands}),
+@code{where-is-internal} figures out when a command will be run due to
+remapping and reports keys accordingly. It also returns @code{nil} if
+@var{command} won't really be run because it has been remapped to some
+other command. However, if @var{no-remap} is non-@code{nil}.
+@code{where-is-internal} ignores remappings.
+
@smallexample
@group
(where-is-internal 'describe-function)
@defun tool-bar-add-item-from-menu command icon &optional map &rest props
@tindex tool-bar-add-item-from-menu
-This command is a convenience for defining tool bar items which are
+This function is a convenience for defining tool bar items which are
consistent with existing menu bar bindings. The binding of
@var{command} is looked up in the menu bar in @var{map} (default
@code{global-map}) and modified to add an image specification for
-@var{icon}, which is looked for in the same way as by
+@var{icon}, which is found in the same way as by
@code{tool-bar-add-item}. The resulting binding is then placed in
-@code{tool-bar-map}. @var{map} must contain an appropriate keymap bound
-to @code{[menu-bar]}. The remaining arguments @var{props} are
-additional property list elements to add to the menu item specification.
+@code{tool-bar-map}, so use this function only for global tool bar
+items.
+
+@var{map} must contain an appropriate keymap bound to
+@code{[menu-bar]}. The remaining arguments @var{props} are additional
+property list elements to add to the menu item specification.
+@end defun
+
+@defun tool-bar-local-item-from-menu command icon in-map &optional from-map &rest props
+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
+@code{tool-bar-add-item-from-menu}.
@end defun
@tindex auto-resize-tool-bar
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