Add :distant-foreground to faces.

* doc/lispref/display.texi (Face Attributes): Document :distant-foreground.

* etc/NEWS: Mention :distant-foreground.

* lisp/faces.el (face-x-resources): Add :distant-foreground.
(region): Use :distant-foreground for gtk and ns.

* src/dispextern.h (lface_attribute_index): Add
LFACE_DISTANT_FOREGROUND_INDEX.

* src/xfaces.c: Declare color_distance.
(QCdistant_foreground): New variable.
(NEAR_SAME_COLOR_THRESHOLD): New define.
(load_color2): New function.
(load_color): Call load_color2.
(load_face_colors): Call load_color2 and if distant-color is specified
calculate distant and use distant-color if colors are near.
(LFACE_DISTANT_FOREGROUND): New define.
(merge_face_ref, Finternal_set_lisp_face_attribute)
(Finternal_get_lisp_face_attribute)
(x_supports_face_attributes_p): Handle distant-foreground similar to
foreground.
(syms_of_xfaces): DEFSYM QCdistant_foreground.

2 files changed, 8 insertions, 0 deletions

diff --git a/etc/ChangeLog b/etc/ChangeLog
index 6527a7ab365..d35fa863441 100644
--- a/etc/ChangeLog
+++ b/etc/ChangeLog
@@ -1,3 +1,7 @@
+2013-11-01  Jan Djärv  <jan.h.d@swipnet.se>
+
+        * NEWS: Mention :distant-foreground.
+
 2013-10-16  Dmitry Gutov  <dgutov@yandex.ru>
 
         * NEWS: Mention the homepage-related changes in package.el.
diff --git a/etc/NEWS b/etc/NEWS
index 1443173d255..4fed04da561 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -788,6 +788,10 @@ rather than inheriting from it (as do face specs set via Customize).
 *** New face characteristic (supports :underline (:style wave))
 specifies whether or not the terminal can display a wavy line.
 
+*** New face spec attribute :distant-foreground
+specifies foreground to use if background is near the foreground that would
+otherwise have been used.
+
 ** Image API
 
 +++