(copying_message_with_progress_bar) ensure it doesn't go crazy when

asked to update with the same fraction (migh help mga#7992)

basically backporting commit r219767 by pixel on May 23 2007 from
drakx:
"progress bar wait_message: ensure it doesn't go crazy when asked to
update with the same fraction (eg #30090)"

backported from trunk with label="blino I hate you and all the
lazy forkers..."

2 files changed, 11 insertions, 4 deletions

diff --git a/NEWS b/NEWS
index 8328cb3..7e4444b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+- make sure progress bar doesn't go crazy when asked to update with
+  the same fraction (migh help mga#7992)
+
 1.36
 - switch from hal to udisks
 - fix breakage due to prepare_minimal_root() changes
diff --git a/draklive-install b/draklive-install
index 9543739..d39dcb1 100755..100644
--- a/draklive-install
+++ b/draklive-install
@@ -428,12 +428,16 @@ sub copying_message_with_progress_bar {
 
 	if ($total) {
 	    $progress or internal_error('You must first give some text to display');
-	    $progress->set_fraction($current / $total);
-	    $progress->show;
-	    $displayed = 0;
-	    mygtk2::flush() while !$displayed;
+	    my $fraction = min(1, $current / $total);
+	    if ($fraction != $progress->get_fraction) {
+		$progress->set_fraction($fraction);
+		$progress->show;
+		$displayed = 0;
+		mygtk2::flush() while !$displayed;
+	    }
 	} else {
 	    $progress->hide;
+	    mygtk2::flush();
 	}
     };
 }