Bugfix: Correctly fix the percent values for resizing when making a floating con tiling (Thanks mseed) (+testcase)

src/floating.c

@@ -164,11 +164,8 @@ void floating_disable(Con *con, bool automatic) {
         con->parent = focused;
     else con->parent = focused->parent;
 
-    /* XXX: We adjust the percentage value to start with a fair value. Floating
-     * cons always have 1.0 as percent which doesn’t work so well when
-     * re-inserting (the formerly floating con would get 50% of the target
-     * con). */
-    con->percent = (1.0 / con_num_children(con->parent));
+    /* con_fix_percent will adjust the percent value */
+    con->percent = 0.0;
 
     TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
     TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);

testcases/t/51-regress-float-size.t

@@ -0,0 +1,20 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Regression test for setting a window to floating, tiling and opening a new window
+#
+use Time::HiRes qw(sleep);
+use i3test;
+
+my $tmp = get_unused_workspace;
+cmd "workspace $tmp";
+
+
+cmd 'open';
+cmd 'mode toggle';
+cmd 'mode toggle';
+cmd 'open';
+
+does_i3_live;
+
+done_testing;