[PATCH 2/3] gitk: improve dark background, use diffcolor 2 for link

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blue on a black background might as well look like dark blue on black
and is very difficult to read.  The "Diff: hunk header" keeps the
colors more consistent and both default to blue.

Signed-off-by: David Fries <David@xxxxxxxxx>
---
 gitk-git/gitk |   20 ++++++++++++++++----
 1 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/gitk-git/gitk b/gitk-git/gitk
index af43353..bef2e53 100644
--- a/gitk-git/gitk
+++ b/gitk-git/gitk
@@ -6673,7 +6673,7 @@ proc appendwithlinks {text tags} {
 }
 
 proc setlink {id lk} {
-    global curview ctext pendinglinks
+    global curview ctext pendinglinks diffcolors
 
     set known 0
     if {[string length $id] < 40} {
@@ -6687,7 +6687,7 @@ proc setlink {id lk} {
 	set known [commitinview $id $curview]
     }
     if {$known} {
-	$ctext tag conf $lk -foreground blue -underline 1
+	$ctext tag conf $lk -foreground [lindex $diffcolors 2] -underline 1
 	$ctext tag bind $lk <1> [list selbyid $id]
 	$ctext tag bind $lk <Enter> {linkcursor %W 1}
 	$ctext tag bind $lk <Leave> {linkcursor %W -1}
@@ -10792,8 +10792,7 @@ proc doprefs {} {
     label $top.hunksep -padx 40 -relief sunk -background [lindex $diffcolors 2]
     ${NS}::button $top.hunksepbut -text [mc "Diff: hunk header"] \
 	-command [list choosecolor diffcolors 2 $top.hunksep \
-		      [mc "diff hunk header"] \
-		      [list $ctext tag conf hunksep -foreground]]
+		      [mc "diff hunk header"] sethunksep ]
     grid x $top.hunksepbut $top.hunksep -sticky w
     label $top.markbgsep -padx 40 -relief sunk -background $markbgcolor
     ${NS}::button $top.markbgbut -text [mc "Marked line bg"] \
@@ -10890,6 +10889,19 @@ proc setfg {c} {
     $canv itemconf line -fill $c
 }
 
+# update hunksep and each link foreground color
+proc sethunksep {c} {
+    global ctext linknum
+
+    $ctext tag conf hunksep -foreground $c
+    for {set i 0} {$i < $linknum} {incr i} {
+        # Use -underline to determine if it is a known link and gets this color
+        if {[$ctext tag cget link$i -underline] != ""} {
+            $ctext tag conf link$i -foreground $c
+        }
+    }
+}
+
 proc prefscan {} {
     global oldprefs prefstop
 
-- 
1.7.2.3

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