From 81873994da3a2977cf9228a3f2f357a14c04a1a1 Mon Sep 17 00:00:00 2001
From: Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
Date: Tue, 27 Sep 2016 22:41:17 -0300
Subject: [PATCH] views: protect against invalid drop

If the user tries to drop a e.g. file, GNOME Calendar crashes
immediately.

While the desired behavior would be checking if that's an ics file,
lets just not crash for now.

https://bugzilla.gnome.org/show_bug.cgi?id=771680
---
 src/gcal-month-view.c | 4 ++++
 src/gcal-year-view.c  | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/src/gcal-month-view.c b/src/gcal-month-view.c
index f32f8fa6..a09b0c66 100644
--- a/src/gcal-month-view.c
+++ b/src/gcal-month-view.c
@@ -879,6 +879,10 @@ gcal_month_view_drag_drop (GtkWidget      *widget,
 
   cell = get_dnd_cell (widget, x, y);
   event_widget = gtk_drag_get_source_widget (context);
+
+  if (!GCAL_IS_EVENT_WIDGET (event_widget))
+    return FALSE;
+
   event = gcal_event_widget_get_event (GCAL_EVENT_WIDGET (event_widget));
 
   /* Move the event's date */
diff --git a/src/gcal-year-view.c b/src/gcal-year-view.c
index 0f512c20..83289bb8 100644
--- a/src/gcal-year-view.c
+++ b/src/gcal-year-view.c
@@ -1342,6 +1342,9 @@ navigator_drag_drop_cb (GcalYearView   *self,
 
   if (calculate_day_month_for_coord (self, x, y, &day, &month, &is_title))
     {
+      if (!GCAL_IS_EVENT_WIDGET (gtk_drag_get_source_widget (context)))
+        return FALSE;
+
       if (!is_title)
         {
           GcalEventWidget *event_widget;