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commit 64bb4e051b50
Author: Martin Stransky <stransky@redhat.com>
Date: Tue Oct 17 09:50:18 2017 +0200
Bug 1186967 - ignore double-click on WM without _NET_WM_MOVERESIZE support, r=jhorak
MozReview-Commit-ID: 2Vs6i5leero
--HG--
extra : rebase_source : d8f2bbaf9ef9b2025478f029a68ee7e87e07de79
---
widget/gtk/nsWindow.cpp | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git widget/gtk/nsWindow.cpp widget/gtk/nsWindow.cpp
index eb2f0e5e95cd..955327297ac9 100644
--- widget/gtk/nsWindow.cpp
+++ widget/gtk/nsWindow.cpp
@@ -6444,6 +6444,22 @@ nsWindow::GetDragInfo(WidgetMouseEvent* aMouseEvent,
return false;
}
+ if (mIsX11Display) {
+ // Workaround for https://bugzilla.gnome.org/show_bug.cgi?id=789054
+ // To avoid crashes disable double-click on WM without _NET_WM_MOVERESIZE.
+ // See _should_perform_ewmh_drag() at gdkwindow-x11.c
+ GdkScreen* screen = gdk_window_get_screen(gdk_window);
+ GdkAtom atom = gdk_atom_intern("_NET_WM_MOVERESIZE", FALSE);
+ if (!gdk_x11_screen_supports_net_wm_hint(screen, atom)) {
+ static unsigned int lastTimeStamp = 0;
+ if (lastTimeStamp != aMouseEvent->mTime) {
+ lastTimeStamp = aMouseEvent->mTime;
+ } else {
+ return false;
+ }
+ }
+ }
+
// FIXME: It would be nice to have the widget position at the time
// of the event, but it's relatively unlikely that the widget has
// moved since the mousedown. (On the other hand, it's quite likely
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