Add a way to have out of source shell integrations

Some platforms (especially non-desktop ones) may use a custom
Wayland shell extension, more tailored to the form factor than
the generic and desktoppy wl_shell or xdg_shell. Instead of stuffing
N protocol implementations in the QPA plugin use a plugin architecture
to allow them to live out of tree.
When creating a shell surface the QT_WAYLAND_SHELL_INTEGRATION env
variable will be checked, and if it points to a valid plugin that
will be used to create the shell surface, falling back to wl_shell
or xdg_shell if no plugin is specified.

Change-Id: I05019174bb915199dd726f5fdcc0385ef846e8de
Reviewed-by: Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>
Reviewed-by: Philippe Coval <rzr@gna.org>
Reviewed-by: Jan Arne Petersen <jan.petersen@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/client/qwaylanddisplay_p.h b/src/client/qwaylanddisplay_p.h
index f1b35a712..6ed30d195 100644
--- a/src/client/qwaylanddisplay_p.h
+++ b/src/client/qwaylanddisplay_p.h
@@ -73,6 +73,7 @@ class QWaylandEventThread;
 class QWaylandIntegration;
 class QWaylandHardwareIntegration;
 class QWaylandXdgShell;
+class QWaylandShellSurface;
 
 namespace QtWayland {
     class qt_output_extension;
@@ -101,6 +102,7 @@ public:
     QWaylandScreen *screenForOutput(struct wl_output *output) const;
 
     struct wl_surface *createSurface(void *handle);
+    QWaylandShellSurface *createShellSurface(QWaylandWindow *window);
 
     QWaylandClientBufferIntegration *clientBufferIntegration() const;
 
@@ -142,6 +144,7 @@ public:
         RegistryGlobal(uint32_t id_, const QString &interface_, uint32_t version_, struct ::wl_registry *registry_)
             : id(id_), interface(interface_), version(version_), registry(registry_) { }
     };
+    QList<RegistryGlobal> globals() const { return mGlobals; }
 
     /* wl_registry_add_listener does not add but rather sets a listener, so this function is used
      * to enable many listeners at once. */