Commit 84eeb7e5 authored by Per Cederqvist's avatar Per Cederqvist
Browse files

(device-class): Provide a better version if display-color-p exists.

parent 42300c03
......@@ -673,14 +673,33 @@ The order of the list a is kept."
(lyskom-provide-function console-type (&optional console)
(or window-system 'tty))
(lyskom-provide-function device-class (&optional device)
(condition-case nil
(if (x-display-grayscale-p)
(if (x-display-color-p)
(error 'mono)))
(lyskom-external-function display-color-p)
(lyskom-external-function display-grayscale-p)
(if (fboundp 'device-class)
(setq lyskom-compatibility-definitions
(cons 'device-class lyskom-compatibility-definitions))
(if (and (fboundp 'display-color-p) (fboundp 'display-grayscale-p))
;; Emacs 21 can use color even when not running under
;; X-windows. Note that display-grayscale-p can be false when
;; using a color display! This happens when running on a
;; classic Linux tty console.
(defun device-class (&optional device)
(cond ((display-color-p device) 'color)
((display-grayscale-p device) 'grayscale)
(t 'mono)))
;; This works in Emacs 20 and earlier.
(defun device-class (&optional device)
(condition-case nil
(if (x-display-grayscale-p device)
(if (x-display-color-p device)
(error 'mono))))))
(lyskom-provide-function frame-property (frame property &optional default)
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