ui/clipboard: add qemu_clipboard_peer_owns() helper

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210805135715.857938-7-marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

include/ui/clipboard.h

@@ -109,6 +109,17 @@ void qemu_clipboard_peer_register(QemuClipboardPeer *peer);
  */
 void qemu_clipboard_peer_unregister(QemuClipboardPeer *peer);
 
+/**
+ * qemu_clipboard_peer_owns
+ *
+ * @peer: peer information.
+ * @selection: clipboard selection.
+ *
+ * Return TRUE if the peer owns the clipboard.
+ */
+bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
+                              QemuClipboardSelection selection);
+
 /**
  * qemu_clipboard_info
  *

ui/clipboard.c

@@ -16,6 +16,14 @@ void qemu_clipboard_peer_unregister(QemuClipboardPeer *peer)
     notifier_remove(&peer->update);
 }
 
+bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
+                              QemuClipboardSelection selection)
+{
+    QemuClipboardInfo *info = qemu_clipboard_info(selection);
+
+    return info && info->owner == peer;
+}
+
 void qemu_clipboard_update(QemuClipboardInfo *info)
 {
     g_autoptr(QemuClipboardInfo) old = NULL;