Add get_accessible vfunc to wpe_view_backend_client

And wpe_view_backend_dispatch_get_accessible()

Author: carlosgcampos

include/wpe/view-backend.h

@@ -103,9 +103,9 @@ struct wpe_view_backend_client {
     void (*set_size)(void*, uint32_t, uint32_t);
     void (*frame_displayed)(void*);
     void (*activity_state_changed)(void*, uint32_t);
+    void* (*get_accessible)(void*);
     void (*_wpe_reserved0)(void);
     void (*_wpe_reserved1)(void);
-    void (*_wpe_reserved2)(void);
 };
 
 WPE_EXPORT
@@ -128,6 +128,10 @@ WPE_EXPORT
 uint32_t
 wpe_view_backend_get_activity_state(struct wpe_view_backend*);
 
+WPE_EXPORT
+void*
+wpe_view_backend_dispatch_get_accessible(struct wpe_view_backend* backend);
+
 struct wpe_view_backend_input_client {
     void (*handle_keyboard_event)(void*, struct wpe_input_keyboard_event*);
     void (*handle_pointer_event)(void*, struct wpe_input_pointer_event*);

src/view-backend.c

@@ -146,6 +146,14 @@ wpe_view_backend_get_activity_state(struct wpe_view_backend* backend)
     return backend->activity_state;
 }
 
+void*
+wpe_view_backend_dispatch_get_accessible(struct wpe_view_backend* backend)
+{
+    if (backend->backend_client && backend->backend_client->get_accessible)
+        return backend->backend_client->get_accessible(backend->backend_client_data);
+    return NULL;
+}
+
 void
 wpe_view_backend_dispatch_keyboard_event(struct wpe_view_backend* backend, struct wpe_input_keyboard_event* event)
 {