Clear the SHA1 entry field when we go to paste something into it

If the user pastes in the selection (with the middle mouse button) and
it already has 40 characters in it, clear it before pasting.

diff --git a/gitk b/gitk
index 779d71cf5bc871ffd349715b116321395bd0f0c9..9ad7bfc7e164b7d6194ddf0a8ed08b9ea708b98f 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -398,6 +398,7 @@ proc makewindow {} {
     bind . <Button-1> "click %W"
     bind $fstring <Key-Return> dofind
     bind $sha1entry <Key-Return> gotocommit
+    bind $sha1entry <<PasteSelection>> clearsha1
 
     set maincursor [. cget -cursor]
     set textcursor [$ctext cget -cursor]
@@ -1566,6 +1567,13 @@ proc incrfont {inc} {
     redisplay
 }
 
+proc clearsha1 {} {
+    global sha1entry sha1string
+    if {[string length $sha1string] == 40} {
+       $sha1entry delete 0 end
+    }
+}
+
 proc sha1change {n1 n2 op} {
     global sha1string currentid sha1but
     if {$sha1string == {}