ui/clipboard: add qemu_clipboard_peer_release() helper

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210805135715.857938-8-marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 23 insertions, 0 deletions

diff --git a/include/ui/clipboard.h b/include/ui/clipboard.h
index 25e0b470c8..6298986b15 100644
--- a/include/ui/clipboard.h
+++ b/include/ui/clipboard.h
@@ -121,6 +121,17 @@ bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
                               QemuClipboardSelection selection);
 
 /**
+ * qemu_clipboard_peer_release
+ *
+ * @peer: peer information.
+ * @selection: clipboard selection.
+ *
+ * If the peer owns the clipboard, release it.
+ */
+void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
+                                 QemuClipboardSelection selection);
+
+/**
  * qemu_clipboard_info
  *
  * @selection: clipboard selection.
diff --git a/ui/clipboard.c b/ui/clipboard.c
index 490c3220f4..c277247a7f 100644
--- a/ui/clipboard.c
+++ b/ui/clipboard.c
@@ -24,6 +24,18 @@ bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
     return info && info->owner == peer;
 }
 
+void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
+                                 QemuClipboardSelection selection)
+{
+    g_autoptr(QemuClipboardInfo) info = NULL;
+
+    if (qemu_clipboard_peer_owns(peer, selection)) {
+        /* set empty clipboard info */
+        info = qemu_clipboard_info_new(NULL, selection);
+        qemu_clipboard_update(info);
+    }
+}
+
 void qemu_clipboard_update(QemuClipboardInfo *info)
 {
     g_autoptr(QemuClipboardInfo) old = NULL;