[gtk+/wip/alexl/broadway4: 77/96] broadway: Fix input events

[Alexander Larsson <alexl src gnome org>]

commit cfdb3952c6db7c8652bfeb0c65f3fa5a4cb3186f
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Nov 21 21:22:04 2017 +0100

    broadway: Fix input events

 gdk/broadway/broadway.js |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/gdk/broadway/broadway.js b/gdk/broadway/broadway.js
index 72cd91c..32406b0 100644
--- a/gdk/broadway/broadway.js
+++ b/gdk/broadway/broadway.js
@@ -582,10 +582,14 @@ function handleMessage(message)
 }
 
 function getSurfaceId(ev) {
-    var surface = ev.target.surface;
-    if (surface != undefined)
-        return surface.id;
-    return 0;
+    var target = ev.target;
+    while (target.surface == undefined) {
+       if (target == document)
+           return 0;
+       target = target.parentNode;
+    }
+
+    return target.surface.id;
 }
 
 function sendInput(cmd, args)