winewayland.drv: Implement IDataObject::GetData for data offers.

If the associated data offer has a mime type matching the requested
Windows clipboard format, import the data into a HGLOBAL memory object.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>

dlls/winewayland.drv/unixlib.h

@@ -33,6 +33,7 @@ enum waylanddrv_unix_func
     waylanddrv_unix_func_read_events,
     waylanddrv_unix_func_clipboard_message,
     waylanddrv_unix_func_data_offer_accept_format,
+    waylanddrv_unix_func_data_offer_import_format,
     waylanddrv_unix_func_count,
 };
 
@@ -50,6 +51,14 @@ struct waylanddrv_unix_data_offer_accept_format_params
     UINT format;
 };
 
+struct waylanddrv_unix_data_offer_import_format_params
+{
+    PTR32 data_offer;
+    UINT format;
+    PTR32 data;
+    UINT size;
+};
+
 /* driver client callbacks exposed with KernelCallbackTable interface */
 enum waylanddrv_client_func
 {

dlls/winewayland.drv/wayland_data_device.c

@@ -715,3 +715,39 @@ NTSTATUS waylanddrv_unix_data_offer_accept_format(void *arg)
 
     return STATUS_UNSUCCESSFUL;
 }
+
+NTSTATUS waylanddrv_unix_data_offer_import_format(void *arg)
+{
+    struct waylanddrv_unix_data_offer_import_format_params *p = arg;
+    struct wayland_data_offer *data_offer = UIntToPtr(p->data_offer);
+    struct wayland_data_device_format *format;
+
+    TRACE("data_offer=%p clipboard_format=%d\n", data_offer, p->format);
+
+    format = wayland_data_device_format_for_clipboard_format(p->format,
+                                                             &data_offer->types);
+    if (format)
+    {
+        void *data, *vdata = NULL;
+        size_t size;
+        SIZE_T vsize;
+
+        if (!(data = wayland_data_offer_import_format(data_offer, format, &size)))
+            return STATUS_UNSUCCESSFUL;
+        vsize = size;
+        if (NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&vdata,
+                                    zero_bits(), &vsize, MEM_COMMIT, PAGE_READWRITE) ||
+            !vdata)
+        {
+            free(data);
+            return STATUS_UNSUCCESSFUL;
+        }
+        memcpy(vdata, data, size);
+        p->data = PtrToUint(vdata);
+        p->size = size;
+        free(data);
+        return STATUS_SUCCESS;
+    }
+
+    return STATUS_UNSUCCESSFUL;
+}

dlls/winewayland.drv/wayland_data_device_dll.c

@@ -121,9 +121,38 @@ static HRESULT WINAPI dataOfferDataObject_GetData(IDataObject *data_object,
                                                   FORMATETC *format_etc,
                                                   STGMEDIUM *medium)
 {
+    HRESULT hr;
+    struct waylanddrv_unix_data_offer_import_format_params params;
+    void *data;
+
     TRACE("(%p, %p, %p)\n", data_object, format_etc, medium);
 
-    return E_UNEXPECTED;
+    hr = IDataObject_QueryGetData(data_object, format_etc);
+    if (!SUCCEEDED(hr))
+        return hr;
+
+    params.data_offer = PtrToUint(data_object);
+    params.format = format_etc->cfFormat;
+    params.data = 0;
+    params.size = 0;
+
+    if (WAYLANDDRV_UNIX_CALL(data_offer_import_format, &params) != 0 || !params.data)
+        return E_UNEXPECTED;
+
+    data = UIntToPtr(params.data);
+
+    medium->hGlobal = GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT, params.size);
+    if (medium->hGlobal == NULL)
+        return E_OUTOFMEMORY;
+    memcpy(GlobalLock(medium->hGlobal), data, params.size);
+    GlobalUnlock(medium->hGlobal);
+
+    medium->tymed = TYMED_HGLOBAL;
+    medium->pUnkForRelease = 0;
+
+    VirtualFree(data, params.size, MEM_RELEASE);
+
+    return S_OK;
 }
 
 static HRESULT WINAPI dataOfferDataObject_GetDataHere(IDataObject *data_object,

dlls/winewayland.drv/waylanddrv.h

@@ -825,6 +825,7 @@ NTSTATUS waylanddrv_client_call(enum waylanddrv_client_func func, const void *pa
                                 ULONG size) DECLSPEC_HIDDEN;
 NTSTATUS waylanddrv_unix_clipboard_message(void *arg) DECLSPEC_HIDDEN;
 NTSTATUS waylanddrv_unix_data_offer_accept_format(void *arg) DECLSPEC_HIDDEN;
+NTSTATUS waylanddrv_unix_data_offer_import_format(void *arg) DECLSPEC_HIDDEN;
 
 /**********************************************************************
  *          USER driver functions

dlls/winewayland.drv/waylanddrv_main.c

@@ -227,6 +227,7 @@ const unixlib_entry_t __wine_unix_call_funcs[] =
     waylanddrv_unix_read_events,
     waylanddrv_unix_clipboard_message,
     waylanddrv_unix_data_offer_accept_format,
+    waylanddrv_unix_data_offer_import_format,
 };
 
 C_ASSERT(ARRAYSIZE(__wine_unix_call_funcs) == waylanddrv_unix_func_count);
@@ -256,6 +257,7 @@ const unixlib_entry_t __wine_unix_call_wow64_funcs[] =
     waylanddrv_unix_read_events,
     waylanddrv_unix_clipboard_message_wow64,
     waylanddrv_unix_data_offer_accept_format,
+    waylanddrv_unix_data_offer_import_format,
 };
 
 C_ASSERT(ARRAYSIZE(__wine_unix_call_wow64_funcs) == waylanddrv_unix_func_count);