Info Catalog eintr: Keybindings eintr: Emacs Initialization eintr: Loading Files

eintr: Keymaps

 
 16.8 Keymaps
 ============
 
 Emacs uses “keymaps” to record which keys call which commands.  When you
 use ‘global-set-key’ to set the keybinding for a single command in all
 parts of Emacs, you are specifying the keybinding in
 ‘current-global-map’.
 
    Specific modes, such as C mode or Text mode, have their own keymaps;
 the mode-specific keymaps override the global map that is shared by all
 buffers.
 
    The ‘global-set-key’ function binds, or rebinds, the global keymap.
 For example, the following binds the key ‘C-x C-b’ to the function
 ‘buffer-menu’:
 
      (global-set-key "\C-x\C-b" 'buffer-menu)
 
    Mode-specific keymaps are bound using the ‘define-key’ function,
 which takes a specific keymap as an argument, as well as the key and the
 command.  For example, my ‘.emacs’ file contains the following
 expression to bind the ‘texinfo-insert-@group’ command to ‘C-c C-c g’:
 
      (define-key texinfo-mode-map "\C-c\C-cg" 'texinfo-insert-@group)
 
 The ‘texinfo-insert-@group’ function itself is a little extension to
 Texinfo mode that inserts ‘@group’ into a Texinfo file.  I use this
 command all the time and prefer to type the three strokes ‘C-c C-c g’
 rather than the six strokes ‘@ g r o u p’.  (‘@group’ and its matching
 ‘@end group’ are commands that keep all enclosed text together on one
 page; many multi-line examples in this book are surrounded by ‘@group
 ... @end group’.)
 
    Here is the ‘texinfo-insert-@group’ function definition:
 
      (defun texinfo-insert-@group ()
        "Insert the string @group in a Texinfo buffer."
        (interactive)
        (beginning-of-line)
        (insert "@group\n"))
 
    (Of course, I could have used Abbrev mode to save typing, rather than
 write a function to insert a word; but I prefer key strokes consistent
 with other Texinfo mode key bindings.)
 
    You will see numerous ‘define-key’ expressions in ‘loaddefs.el’ as
 well as in the various mode libraries, such as ‘cc-mode.el’ and
 ‘lisp-mode.el’.
 
DONTPRINTYET     Customizing Key Bindings (emacs)Key Bindings, and *noteDONTPRINTYET     Customizing Key Bindings (emacs)Key Bindings, and 
 Keymaps (elisp)Keymaps, for more information about keymaps.
 

Info Catalog eintr: Keybindings eintr: Emacs Initialization eintr: Loading Files