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;; Copyright (C) 2003 Shawn Betts
;;
;; This file is part of stumpwm.
;;
;; stumpwm is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; stumpwm is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this software; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
;; Boston, MA 02111-1307 USA
;; Commentary:
;;
;; This file handles keymaps
;;
;; Code:
(in-package stumpwm)
(export '(define-key
kbd
lookup-command
lookup-key
make-sparse-keymap
undefine-key))
(defstruct key
keysym shift control meta alt hyper super)
(defun make-sparse-keymap ()
"Create an empty keymap. If you want to create a new list of bindings
in the key binding tree, this is where you start. To hang frame
related bindings off @kbd{C-t C-f} one might use the following code:
@example
\(defvar *my-frame-bindings*
(let ((m (stumpwm:make-sparse-keymap)))
(stumpwm:define-key m (stumpwm:kbd \"f\") \"curframe\")
(stumpwm:define-key m (stumpwm:kbd \"M-b\") \"move-focus left\")
m ; NOTE: this is important
))
\(stumpwm:define-key stumpwm:*root-map* (stumpwm:kbd \"C-f\") '*my-frame-bindings*)
@end example"
(make-hash-table :test 'equalp))
(defun lookup-command (keymap command)
"Return a list of keys that are bound to command"
(let (acc)
(maphash (lambda (k v)
(when (equal command v)
(push k acc)))
keymap)
acc))
(defun lookup-key (keymap key &optional accept-default)
(or (gethash key keymap)
(and accept-default
(gethash t keymap))))
(defun key-mods-p (key)
(or (key-shift key)
(key-control key)
(key-meta key)
(key-alt key)
(key-hyper key)
(key-super key)))
(defun x11-mods (key &optional with-numlock)
"Return the modifiers for key in a format that clx
understands. if WITH-NUMLOCK is non-nil then include the numlock
modifier. Most of the time numlock just gets in the way."
(let (mods)
(when (key-shift key) (push :shift mods))
(when (key-control key) (push :control mods))
(when (key-meta key) (setf mods (append (modifiers-meta *modifiers*) mods)))
(when (key-alt key) (setf mods (append (modifiers-alt *modifiers*) mods)))
(when (key-hyper key) (setf mods (append (modifiers-hyper *modifiers*) mods)))
(when (key-super key) (setf mods (append (modifiers-super *modifiers*) mods)))
(when with-numlock (setf mods (append (modifiers-numlock *modifiers*) mods)))
(apply 'xlib:make-state-mask mods)))
(define-condition kbd-parse ()
() (:documentation "Raised when a kbd string failed to parse."))
(defun parse-mods (mods end)
"MODS is a sequence of <MOD CHAR> #\- pairs. Return a list suitable
for passing as the last argument to (apply #'make-key ...)"
(unless (evenp end)
(signal 'kbd-parse))
(apply #'nconc (loop for i from 0 below end by 2
if (char/= (char mods (1+ i)) #\-)
do (signal 'kbd-parse)
collect (case (char mods i)
(#\M (list :meta t))
(#\A (list :alt t))
(#\C (list :control t))
(#\H (list :hyper t))
(#\s (list :super t))
(#\S (list :shift t))
(t (signal 'kbd-parse))))))
(defun parse-key (string)
"Parse STRING and return a key structure."
;; FIXME: we want to return NIL when we get a kbd-parse error
;;(ignore-errors
(let* ((p (when (> (length string) 2)
(position #\- string :from-end t :end (- (length string) 1))))
(mods (parse-mods string (if p (1+ p) 0)))
(keysym (stumpwm-name->keysym (subseq string (if p (1+ p) 0)))))
(and keysym
(apply 'make-key :keysym keysym mods))))
(defun parse-key-seq (keys)
"KEYS is a key sequence. Parse it and return the list of keys."
(mapcar 'parse-key (split-string keys)))
(defun kbd (keys)
"This compiles a key string into a key structure used by
`define-key', `undefine-key', `set-prefix-key' and
others."
;; XXX: define-key needs to be fixed to handle a list of keys
(first (parse-key-seq keys)))
(defun print-mods (key)
(concatenate 'string
(when (key-control key) "C-")
(when (key-meta key) "M-")
(when (key-alt key) "A-")
(when (key-shift key) "S-")
(when (key-super key) "s-")
(when (key-hyper key) "H-")))
(defun print-key (key)
(format nil "~a~a"
(print-mods key)
(keysym->stumpwm-name (key-keysym key))))
(defun print-key-seq (seq)
(format nil "^5*~{~a~^ ~}^n" (mapcar 'print-key seq)))
(defun define-key (map key command)
"Add a keybinding mapping the key, @var{key}, to the command,
@var{command}, in the specified keymap. For example,
@example
\(stumpwm:define-key stumpwm:*root-map* (stumpwm:kbd \"C-z\") \"echo Zzzzz...\")
@end example
Now when you type C-t C-z, you'll see the text ``Zzzzz...'' pop up."
(setf (gethash key map) command)
;; We need to tell the X server when changing the top-map bindings.
(when (eq map *top-map*)
(sync-keys)))
(defun undefine-key (map key)
"Clear the key binding in the specified keybinding."
(remhash key map))
(defun lookup-key-sequence (kmap key-seq)
"Return the command bound to the key sequenc, KEY-SEQ, in keymap KMAP."
(when (and (symbolp kmap)
(boundp kmap)
(hash-table-p (symbol-value kmap)))
(setf kmap (symbol-value kmap)))
(check-type kmap hash-table)
(let* ((key (car key-seq))
(cmd (lookup-key kmap key)))
(cond ((null (cdr key-seq))
cmd)
(cmd
(if (or (hash-table-p cmd)
(and (symbolp cmd)
(boundp cmd)
(hash-table-p (symbol-value cmd))))
(lookup-key-sequence cmd (cdr key-seq))
cmd))
(t nil))))
(defun kmap-p (x)
(or (hash-table-p x)
(and (symbolp x)
(boundp x)
(hash-table-p (symbol-value x)))))
(defun search-kmap (command keymap &key (test 'equal))
"Search the keymap for the specified binding. Return the key
sequences that run binding."
(labels ((search-it (cmd kmap key-seq)
(when (and (symbolp kmap)
(boundp kmap)
(hash-table-p (symbol-value kmap)))
(setf kmap (symbol-value kmap)))
(check-type kmap hash-table)
(let (cmds)
(maphash (lambda (k v)
(cond ((funcall test v cmd)
(push (cons k key-seq) cmds))
((kmap-p v)
(setf cmds (append cmds (search-it cmd v (cons k key-seq)))))))
kmap)
cmds)))
(mapcar 'reverse (search-it command keymap nil))))
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