wayland: Keep wl_shell_surface state during loss of window

It has been common practice (in QT5 for example) to set
wl_shell_surface state at situations where mutter will have destroyed
the MetaWindow. This commit keeps track of the relevant state
separately from MetaWindow, and synchronizes when needed.

https://bugzilla.gnome.org/show_bug.cgi?id=757623

https://bugzilla.gnome.org/show_bug.cgi?id=763431

1 files changed, 27 insertions, 0 deletions

diff --git a/src/wayland/meta-wayland-surface.h b/src/wayland/meta-wayland-surface.h
index cf6b79b35..190ee1f14 100644
--- a/src/wayland/meta-wayland-surface.h
+++ b/src/wayland/meta-wayland-surface.h
@@ -156,6 +156,16 @@ struct _MetaWaylandDragDestFuncs
                       MetaWaylandSurface    *surface);
 };
 
+typedef enum
+{
+  META_WL_SHELL_SURFACE_STATE_NONE,
+  META_WL_SHELL_SURFACE_STATE_TOPLEVEL,
+  META_WL_SHELL_SURFACE_STATE_POPUP,
+  META_WL_SHELL_SURFACE_STATE_TRANSIENT,
+  META_WL_SHELL_SURFACE_STATE_FULLSCREEN,
+  META_WL_SHELL_SURFACE_STATE_MAXIMIZED,
+} MetaWlShellSurfaceState;
+
 struct _MetaWaylandSurface
 {
   GObject parent;
@@ -221,6 +231,23 @@ struct _MetaWaylandSurface
     struct wl_listener destroy_listener;
   } popup;
 
+  /* wl_shell_surface */
+  struct {
+    MetaWlShellSurfaceState state;
+
+    char *title;
+    char *wm_class;
+
+    gboolean pending_popup;
+    MetaWaylandSurface *parent_surface;
+    GList *children;
+
+    MetaWaylandSeat *popup_seat;
+
+    int x;
+    int y;
+  } wl_shell;
+
   /* wl_subsurface stuff. */
   struct {
     MetaWaylandSurface *parent;