diff options
Diffstat (limited to 'lisp/faces.el')
| -rw-r--r-- | lisp/faces.el | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/lisp/faces.el b/lisp/faces.el index 612bd1677bb..c9cc611a97a 100644 --- a/lisp/faces.el +++ b/lisp/faces.el @@ -1792,6 +1792,32 @@ If FRAME is nil, that stands for the selected frame." (mapcar 'car (tty-color-alist frame)))) (defalias 'x-defined-colors 'defined-colors) +(defun defined-colors-with-face-attributes (&optional frame) + "Return a list of colors supported for a particular frame. +See `defined-colors' for arguments and return value. In contrast +to `define-colors' the elements of the returned list are color +strings with text properties, that make the color names render +with the color they represent as background color." + (mapcar + (lambda (color-name) + (let ((foreground (readable-foreground-color color-name)) + (color (copy-sequence color-name))) + (propertize color 'face (list :foreground foreground + :background color)))) + (defined-colors frame))) + +(defun readable-foreground-color (color) + "Return a readable foreground color for background COLOR." + (let* ((rgb (color-values color)) + (max (apply #'max rgb)) + (black (car (color-values "black"))) + (white (car (color-values "white")))) + ;; Select black or white depending on which one is less similar to + ;; the brightest component. + (if (> (abs (- max black)) (abs (- max white))) + "black" + "white"))) + (declare-function xw-color-defined-p "xfns.c" (color &optional frame)) (defun color-defined-p (color &optional frame) @@ -1896,22 +1922,24 @@ resulting color name in the echo area." (colors (or facemenu-color-alist (append '("foreground at point" "background at point") (if allow-empty-name '("")) - (defined-colors)))) + (if (display-color-p) + (defined-colors-with-face-attributes) + (defined-colors))))) (color (completing-read (or prompt "Color (name or #RGB triplet): ") ;; Completing function for reading colors, accepting ;; both color names and RGB triplets. (lambda (string pred flag) (cond - ((null flag) ; Try completion. + ((null flag) ; Try completion. (or (try-completion string colors pred) (if (color-defined-p string) string))) - ((eq flag t) ; List all completions. + ((eq flag t) ; List all completions. (or (all-completions string colors pred) (if (color-defined-p string) (list string)))) - ((eq flag 'lambda) ; Test completion. + ((eq flag 'lambda) ; Test completion. (or (member string colors) (color-defined-p string))))) nil t))) @@ -2670,6 +2698,13 @@ It is used for characters of no fonts too." :version "24.1" :group 'basic-faces) +(defface read-multiple-choice-face + '((t (:inherit underline + :weight bold))) + "Face for the symbol name in Apropos output." + :group 'basic-faces + :version "25.2") + ;; Faces for TTY menus. (defface tty-menu-enabled-face '((t |