dnd: Support dropping as text/plain;charset=utf-8

clients/dnd.c

@@ -82,6 +82,7 @@ static const int item_height = 64;
 static const int item_padding = 16;
 
 static const char flower_mime_type[] = "application/x-wayland-dnd-flower";
+static const char text_mime_type[] = "text/plain;charset=utf-8";
 
 static struct item *
 item_create(struct display *display, int x, int y, int seed)
@@ -280,13 +281,26 @@ data_source_send(void *data, struct wl_data_source *source,
 {
 	struct dnd_flower_message dnd_flower_message;	
 	struct dnd_drag *dnd_drag = data;
-	
-	dnd_flower_message.seed = dnd_drag->item->seed;
-	dnd_flower_message.x_offset = dnd_drag->x_offset;
-	dnd_flower_message.y_offset = dnd_drag->y_offset;
-
-	if (write(fd, &dnd_flower_message, sizeof dnd_flower_message) < 0)
-		abort();
+	char buffer[128];
+	int n;
+
+	if (strcmp(mime_type, flower_mime_type) == 0) {
+		dnd_flower_message.seed = dnd_drag->item->seed;
+		dnd_flower_message.x_offset = dnd_drag->x_offset;
+		dnd_flower_message.y_offset = dnd_drag->y_offset;
+
+		if (write(fd, &dnd_flower_message,
+			  sizeof dnd_flower_message) < 0)
+			abort();
+	} else if (strcmp(mime_type, text_mime_type) == 0) {
+		n = snprintf(buffer, sizeof buffer, "seed=%d x=%d y=%d\n",
+			     dnd_drag->item->seed,
+			     dnd_drag->x_offset,
+			     dnd_drag->y_offset);
+
+		if (write(fd, buffer, n) < 0)
+			abort();
+	}
 
 	close(fd);
 }
@@ -425,9 +439,9 @@ dnd_button_handler(struct widget *widget,
 						    &data_source_listener,
 						    dnd_drag);
 			wl_data_source_offer(dnd_drag->data_source,
-					     "application/x-wayland-dnd-flower");
+					     flower_mime_type);
 			wl_data_source_offer(dnd_drag->data_source,
-					     "text/plain; charset=utf-8");
+					     text_mime_type);
 		}
 
 		wl_data_device_start_drag(input_get_data_device(input),