1 files changed, 118 insertions, 0 deletions
diff --git a/vcl/unx/gtk4/transferableprovider.cxx b/vcl/unx/gtk4/transferableprovider.cxx
new file mode 100644
index 0000000000..554b80c0d4
--- /dev/null
+++ b/vcl/unx/gtk4/transferableprovider.cxx
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <com/sun/star/datatransfer/XTransferable.hpp>
+#include <unx/gtk/gtkinst.hxx>
+#include "transferableprovider.hxx"
+
+#define TRANSFERABLE_CONTENT(obj)                                                                  \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj), transerable_content_get_type(), TransferableContent))
+
+struct _TransferableContent
+{
+    GdkContentProvider parent;
+    VclToGtkHelper* m_pConversionHelper;
+    css::datatransfer::XTransferable* m_pContents;
+    Link<void*, void> m_aDetachClipboardLink;
+};
+
+namespace
+{
+struct _TransferableContentClass : public GdkContentProviderClass
+{
+};
+}
+
+G_DEFINE_TYPE(TransferableContent, transerable_content, GDK_TYPE_CONTENT_PROVIDER)
+
+static void transerable_content_write_mime_type_async(GdkContentProvider* provider,
+                                                      const char* mime_type, GOutputStream* stream,
+                                                      int io_priority, GCancellable* cancellable,
+                                                      GAsyncReadyCallback callback,
+                                                      gpointer user_data)
+{
+    TransferableContent* self = TRANSFERABLE_CONTENT(provider);
+    if (!self->m_pContents)
+        return;
+    // tdf#129809 take a reference in case m_aContents is replaced during this
+    // call
+    css::uno::Reference<css::datatransfer::XTransferable> xCurrentContents(self->m_pContents);
+    self->m_pConversionHelper->setSelectionData(xCurrentContents, provider, mime_type, stream,
+                                                io_priority, cancellable, callback, user_data);
+}
+
+static gboolean transerable_content_write_mime_type_finish(GdkContentProvider*,
+                                                           GAsyncResult* result, GError** error)
+{
+    return g_task_propagate_boolean(G_TASK(result), error);
+}
+
+static GdkContentFormats* transerable_content_ref_formats(GdkContentProvider* provider)
+{
+    TransferableContent* self = TRANSFERABLE_CONTENT(provider);
+    css::uno::Reference<css::datatransfer::XTransferable> xCurrentContents(self->m_pContents);
+    if (!xCurrentContents)
+        return nullptr;
+
+    auto aFormats = xCurrentContents->getTransferDataFlavors();
+    std::vector<OString> aGtkTargets(self->m_pConversionHelper->FormatsToGtk(aFormats));
+
+    GdkContentFormatsBuilder* pBuilder = gdk_content_formats_builder_new();
+    for (const auto& rFormat : aGtkTargets)
+        gdk_content_formats_builder_add_mime_type(pBuilder, rFormat.getStr());
+    return gdk_content_formats_builder_free_to_formats(pBuilder);
+}
+
+static void transerable_content_detach_clipboard(GdkContentProvider* provider, GdkClipboard*)
+{
+    TransferableContent* self = TRANSFERABLE_CONTENT(provider);
+    self->m_aDetachClipboardLink.Call(nullptr);
+}
+
+static void transerable_content_class_init(TransferableContentClass* klass)
+{
+    GdkContentProviderClass* provider_class = GDK_CONTENT_PROVIDER_CLASS(klass);
+
+    provider_class->ref_formats = transerable_content_ref_formats;
+    provider_class->detach_clipboard = transerable_content_detach_clipboard;
+    provider_class->write_mime_type_async = transerable_content_write_mime_type_async;
+    provider_class->write_mime_type_finish = transerable_content_write_mime_type_finish;
+}
+
+static void transerable_content_init(TransferableContent* self)
+{
+    self->m_pConversionHelper = nullptr;
+    self->m_pContents = nullptr;
+    // prevent loplugin:unreffun firing on macro generated function
+    (void)transerable_content_get_instance_private(self);
+}
+
+void transerable_content_set_transferable(TransferableContent* pContent,
+                                          css::datatransfer::XTransferable* pTransferable)
+{
+    pContent->m_pContents = pTransferable;
+}
+
+void transerable_content_set_detach_clipboard_link(TransferableContent* pContent,
+                                                   const Link<void*, void>& rDetachClipboardLink)
+{
+    pContent->m_aDetachClipboardLink = rDetachClipboardLink;
+}
+
+GdkContentProvider* transerable_content_new(VclToGtkHelper* pConversionHelper,
+                                            css::datatransfer::XTransferable* pTransferable)
+{
+    TransferableContent* content
+        = TRANSFERABLE_CONTENT(g_object_new(transerable_content_get_type(), nullptr));
+    content->m_pConversionHelper = pConversionHelper;
+    content->m_pContents = pTransferable;
+    return GDK_CONTENT_PROVIDER(content);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */