13 jan 2014 kl. 14:13 skrev Daniel Colascione <address@hidden>:
The attached patch might be another solution to the problem. It replaces
:distant-foreground with :contrast-function, which punts the actual contrast
logic to lisp by calling the named function during face realization.
(Performance isn't a problem in practice because we cache face realizations.)
In lisp, we implement four low-contrast-mitigation policies: do not adjust for
contrast, adjust automatically (by adjusting CIE L*A*B color space L values),
adjust automatically (by adjusting the V values in HSV color space), or just
set the foreground to a specific color if the contrast dips below a certain
point (the current :distant-foreground behavior). Both the policy and the
parameters (well, the override color) are customizable on a per-face basis;
when merging faces, the one with the highest priority sets the whole behavior.
The main complaint (as I see it) was that a new attribute was added.
It produces surprisingly good results, at least in my tests, adapting
automatically to light and dark backgrounds while preserving the hues of theme
foreground colors.
(Changing themes nukes the face property right now, so you'll have to reset it
each time.)
<adaptive-face.patch>
@@ -1070,7 +1070,8 @@
(:foreground . "foreground color")
(:background . "background color")
(:stipple . "background stipple")
- (:inherit . "inheritance"))
+ (:inherit . "inheritance")
+ (:contrast-function "contrast function"))
"An alist of descriptive names for face attributes.
Each element has the form (ATTRIBUTE-NAME . DESCRIPTION) where
ATTRIBUTE-NAME is a face attribute name (a keyword symbol), and
@@ -1351,7 +1352,6 @@
There is a . missing after :contrast-function.