Add yad_check_x11() for Wayland compatibility

src/cpicker.c

@@ -23,6 +23,16 @@
 
 #include "cpicker.h"
 
+#include <glib/gi18n.h>  /* For _() macro */
+
+/* Forward declaration - defined in main.c when building yad */
+gboolean yad_check_x11 (void);
+
+/* Weak symbol: if yad_check_x11 doesn't exist (tools build), return TRUE for X11 */
+#ifdef __GNUC__
+gboolean __attribute__((weak)) yad_check_x11 (void) { return TRUE; }
+#endif
+
 #define BIG_STEP 20
 
 typedef struct {
@@ -215,6 +225,15 @@ yad_get_screen_color (GtkWidget *widget)
   GdkGrabStatus grab_status;
   GdkWindow *window;
 
+  /* Color picking doesn't work on Wayland - screen capture and device grab are restricted */
+  if (!yad_check_x11 ())
+    {
+      g_printerr (_("WARNING: Color picker is not supported on Wayland.\n"
+                    "Screen capture and pointer grab require X11 or a portal.\n"
+                    "Use GDK_BACKEND=x11 to enable color picking.\n"));
+      return;
+    }
+
   gd = g_new0 (GrabData, 1);
   gd->color_widget = widget;
   gd->time = gtk_get_current_event_time ();

src/main.c

@@ -56,6 +56,12 @@ static gboolean is_x11 = FALSE;
 
 YadNTabs *tabs;
 
+gboolean
+yad_check_x11 (void)
+{
+  return is_x11;
+}
+
 #ifndef G_OS_WIN32
 static void
 sa_usr1 (gint sig)

src/print.c

@@ -284,7 +284,11 @@ yad_print_run (void)
   if (options.data.center)
     gtk_window_set_position (GTK_WINDOW (dlg), GTK_WIN_POS_CENTER);
   else if (options.data.mouse)
-    gtk_window_set_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
+    {
+      /* Mouse positioning doesn't work on Wayland */
+      if (yad_check_x11 ())
+        gtk_window_set_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
+    }
 
   /* create yad's top box */
   if (options.data.dialog_text || options.data.dialog_image)

src/yad.h

@@ -714,6 +714,8 @@ gboolean yad_send_notify (gboolean);
 void notebook_close_childs (void);
 void paned_close_childs (void);
 
+gboolean yad_check_x11 (void);
+
 void read_settings (void);
 void write_settings (void);