[PATCH v3 3/6] winewayland: Generalize support for exporting clipboard formats.

[Alexandros Frantzis]

From: Alexandros Frantzis

Introduce the infrastructure to export various clipboard formats in a
table-driven manner, similar to what's used by winex11.
---
 dlls/winewayland.drv/wayland_data_device.c | 62 +++++++++++++++++++---
 1 file changed, 54 insertions(+), 8 deletions(-)

diff --git a/dlls/winewayland.drv/wayland_data_device.c b/dlls/winewayland.drv/wayland_data_device.c
index b51f5b25ed4..77b9f4f7af0 100644
--- a/dlls/winewayland.drv/wayland_data_device.c
+++ b/dlls/winewayland.drv/wayland_data_device.c
@@ -33,6 +33,13 @@

WINE_DEFAULT_DEBUG_CHANNEL(clipboard);

+struct data_device_format
+{
+    const char *mime_type;
+    UINT clipboard_format;
+    void *(*export)(void *data, size_t size, size_t *ret_size);
+};
+
 static HWND clipboard_hwnd;

static void write_all(int fd, const void *buf, size_t count)
@@ -72,17 +79,49 @@ static void *export_unicode_text(void *data, size_t size, size_t *ret_size)
     return bytes;
 }

+/* Order is important. When selecting a mime-type for a clipboard format we
+ * will choose the first entry that matches the specified clipboard format. */
+static struct data_device_format supported_formats[] =
+{
+    {"text/plain;charset=utf-8", CF_UNICODETEXT, export_unicode_text},
+    {NULL, 0, NULL},
+};
+
+static struct data_device_format *data_device_format_for_clipboard_format(UINT clipboard_format)
+{
+    struct data_device_format *format;
+
+    for (format = supported_formats; format->mime_type; ++format)
+    {
+        if (format->clipboard_format == clipboard_format) return format;
+    }
+
+    return NULL;
+}
+
+static struct data_device_format *data_device_format_for_mime_type(const char *mime)
+{
+    struct data_device_format *format;
+
+    for (format = supported_formats; format->mime_type; ++format)
+    {
+        if (!strcmp(mime, format->mime_type)) return format;
+    }
+
+    return NULL;
+}
+
 /**********************************************************************
  *          zwlr_data_control_source_v1 handling
  */

-static void wayland_data_source_export(int32_t fd)
+static void wayland_data_source_export(struct data_device_format *format, int fd)
 {
     struct get_clipboard_params params = { .data_only = TRUE, .size = 1024 };
     void *exported = NULL;
     size_t exported_size;

-    TRACE("\n");
+    TRACE("format=%u => mime=%s\n", format->clipboard_format, format->mime_type);

if (!NtUserOpenClipboard(clipboard_hwnd, 0))
     {
@@ -93,9 +132,9 @@ static void wayland_data_source_export(int32_t fd)
     for (;;)
     {
         if (!(params.data = malloc(params.size))) break;
-        if (NtUserGetClipboardData(CF_UNICODETEXT, &params))
+        if (NtUserGetClipboardData(format->clipboard_format, &params))
         {
-            exported = export_unicode_text(params.data, params.size, &exported_size);
+            exported = format->export(params.data, params.size, &exported_size);
             break;
         }
         if (!params.data_size) break;
@@ -115,8 +154,10 @@ static void data_control_source_send(void *data,
                                      struct zwlr_data_control_source_v1 *source,
                                      const char *mime_type, int32_t fd)
 {
-    if (!strcmp(mime_type, "text/plain;charset=utf-8"))
-        wayland_data_source_export(fd);
+    struct data_device_format *format =
+        data_device_format_for_mime_type(mime_type);
+
+    if (format) wayland_data_source_export(format, fd);
     close(fd);
 }

@@ -190,8 +231,13 @@ static void clipboard_update(void)

for (i = 0; i < formats_size; ++i)
     {
-        if (formats[i] == CF_UNICODETEXT)
-            zwlr_data_control_source_v1_offer(source, "text/plain;charset=utf-8");
+        struct data_device_format *format =
+            data_device_format_for_clipboard_format(formats[i]);
+        if (format)
+        {
+            TRACE("offering mime=%s for format=%u\n", format->mime_type, formats[i]);
+            zwlr_data_control_source_v1_offer(source, format->mime_type);
+        }
     }

free(formats);