When searching for text in the diff, and there are multiple occurrences
of the search string, the current one is highlighted in orange, and the
other ones in yellow. This makes it much easier to understand what happens
when you then click the Search button or hit Ctrl-S repeatedly.

Signed-off-by: Stefan Haller <ste...@haller-berlin.de>
---
 gitk | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/gitk b/gitk
index 16832a9..e2c0f1c 100755
--- a/gitk
+++ b/gitk
@@ -2361,6 +2361,7 @@ proc makewindow {} {
     $ctext tag conf mresult -font textfontbold
     $ctext tag conf msep -font textfontbold
     $ctext tag conf found -back yellow
+    $ctext tag conf currentsearchhit -back orange
 
     .pwbottom add .bleft
     if {!$use_ttk} {
@@ -2523,6 +2524,7 @@ proc makewindow {} {
     bind $cflist $ctxbut {pop_flist_menu %W %X %Y %x %y}
     bind $ctext $ctxbut {pop_diff_menu %W %X %Y %x %y}
     bind $ctext <Button-1> {focus %W}
+    bind $ctext <<Selection>> rehighlight_search_results
 
     set maincursor [. cget -cursor]
     set textcursor [$ctext cget -cursor]
@@ -8039,7 +8041,6 @@ proc settabs {{firstab {}}} {
 proc incrsearch {name ix op} {
     global ctext searchstring searchdirn
 
-    $ctext tag remove found 1.0 end
     if {[catch {$ctext index anchor}]} {
        # no anchor set, use start of selection, or of visible area
        set sel [$ctext tag ranges sel]
@@ -8058,8 +8059,8 @@ proc incrsearch {name ix op} {
            suppress_highlighting_file_for_current_scrollpos
            highlightfile_for_scrollpos $here
        }
-       searchmarkvisible 1
     }
+    rehighlight_search_results
 }
 
 proc dosearch {} {
@@ -8087,6 +8088,7 @@ proc dosearch {} {
        set mend "$match + $mlen c"
        $ctext tag add sel $match $mend
        $ctext mark unset anchor
+       rehighlight_search_results
     }
 }
 
@@ -8115,18 +8117,36 @@ proc dosearchback {} {
        set mend "$match + $ml c"
        $ctext tag add sel $match $mend
        $ctext mark unset anchor
+       rehighlight_search_results
+    }
+}
+
+proc rehighlight_search_results {} {
+    global ctext searchstring
+
+    $ctext tag remove found 1.0 end
+    $ctext tag remove currentsearchhit 1.0 end
+
+    if {$searchstring ne {}} {
+       searchmarkvisible 1
     }
 }
 
 proc searchmark {first last} {
     global ctext searchstring
 
+    set sel [$ctext tag ranges sel]
+
     set mend $first.0
     while {1} {
        set match [$ctext search -count mlen -- $searchstring $mend $last.end]
        if {$match eq {}} break
        set mend "$match + $mlen c"
-       $ctext tag add found $match $mend
+       if {$sel ne {} && [$ctext compare $match == [lindex $sel 0]]} {
+           $ctext tag add currentsearchhit $match $mend
+       } else {
+           $ctext tag add found $match $mend
+       }
     }
 }
 
-- 
1.7.12.1.399.gae20e0d

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