decorations: make has_ssd public

src/ssd/ssd.c

@@ -13,6 +13,38 @@
 #include "ssd-internal.h"
 #include "theme.h"
 #include "view.h"
+#include "window-rules.h"
+
+bool
+has_ssd(struct view *view)
+{
+	/* Window-rules take priority if they exist for this view */
+	switch (window_rules_get_property(view, "serverDecoration")) {
+	case LAB_PROP_TRUE:
+		return true;
+	case LAB_PROP_FALSE:
+		return false;
+	default:
+		break;
+	}
+
+	/*
+	 * view->ssd_preference may be set by the decoration implementation
+	 * e.g. src/decorations/xdg-deco.c or src/decorations/kde-deco.c.
+	 */
+	switch (view->ssd_preference) {
+	case LAB_SSD_PREF_SERVER:
+		return true;
+	case LAB_SSD_PREF_CLIENT:
+		return false;
+	default:
+		/*
+		 * We don't know anything about the client preference
+		 * so fall back to core.decoration settings in rc.xml
+		 */
+		return rc.xdg_shell_server_side_deco;
+	}
+}
 
 struct border
 ssd_thickness(struct view *view)