wayland: Translate STRING/UTF8_STRING selection atoms to mimetypes

Since the GDK API layer in 3.x is considerably tied to X11 details,
it makes sense to provide this bit of translation in case the app
uses these exclusively and does not use actual mimetype strings.
Provide this bit of translation of X11 selection atoms to mimetypes.

While at it, use the right zwp_primary_selection_source_v1 API with
primary selection data sources. From the looks of it, this just
happened to work.

Closes: https://gitlab.gnome.org/GNOME/gtk/-/issues/5217

diff --git a/gdk/wayland/gdkselection-wayland.c b/gdk/wayland/gdkselection-wayland.c
index d7f3332fa2e6ecf648bead93f7c67cbbd8c9b7fe..6fbdb5e50df8944489d40442eb16b0f3e8a0bc37 100644 (file)
--- a/gdk/wayland/gdkselection-wayland.c
+++ b/gdk/wayland/gdkselection-wayland.c
@@ -34,6 +34,9 @@
 
 #include <string.h>
 
+#define STRING_MIMETYPE "text/plain"
+#define UTF8_STRING_MIMETYPE "text/plain;charset=utf-8"
+
 typedef struct _SelectionBuffer SelectionBuffer;
 typedef struct _SelectionData SelectionData;
 typedef struct _StoredSelection StoredSelection;
@@ -1783,7 +1786,25 @@ gdk_wayland_selection_add_targets (GdkWindow *window,
     {
       gchar *mimetype = gdk_atom_name (targets[i]);
 
-      wl_data_source_offer (data_source, mimetype);
+      if (selection == atoms[ATOM_PRIMARY])
+        {
+          if (g_strcmp0 (mimetype, "STRING") == 0)
+            zwp_primary_selection_source_v1_offer (data_source, STRING_MIMETYPE);
+          else if (g_strcmp0 (mimetype, "UTF8_STRING") == 0)
+            zwp_primary_selection_source_v1_offer (data_source, UTF8_STRING_MIMETYPE);
+
+          zwp_primary_selection_source_v1_offer (data_source, mimetype);
+        }
+      else
+        {
+          if (g_strcmp0 (mimetype, "STRING") == 0)
+            wl_data_source_offer (data_source, STRING_MIMETYPE);
+          else if (g_strcmp0 (mimetype, "UTF8_STRING") == 0)
+            wl_data_source_offer (data_source, UTF8_STRING_MIMETYPE);
+
+          wl_data_source_offer (data_source, mimetype);
+        }
+
       g_free (mimetype);
     }