common: add node-type.c/h (renaming ssd_part_type to lab_node_type)

ssd_part_type contains several node types that are not actually part of
server-side decorations (ROOT, MENU, OSD, etc.)

Rename it accordingly and move it to a common location, along with some
related conversion/comparison functions.

include/common/node-type.h

@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef LABWC_NODE_TYPE_H
+#define LABWC_NODE_TYPE_H
+
+#include "common/edge.h"
+
+/*
+ * In labwc, "node type" indicates the role of a wlr_scene_node in the
+ * overall desktop. It also maps more-or-less to the openbox concept of
+ * "context" (as used when defining mouse bindings).
+ *
+ * Some types (BUTTON, BORDER, etc.) refer to groups or categories of
+ * other node types rather than individual nodes. These categories are
+ * defined as ranges (e.g. BUTTON means anything from BUTTON_FIRST to
+ * BUTTON_LAST), therefore order is significant.
+ *
+ * Be sure to keep node_type_contains() in sync with any changes!
+ */
+enum lab_node_type {
+	LAB_NODE_NONE = 0,
+
+	LAB_NODE_BUTTON_CLOSE = 1,
+	LAB_NODE_BUTTON_MAXIMIZE,
+	LAB_NODE_BUTTON_ICONIFY,
+	LAB_NODE_BUTTON_WINDOW_ICON,
+	LAB_NODE_BUTTON_WINDOW_MENU,
+	LAB_NODE_BUTTON_SHADE,
+	LAB_NODE_BUTTON_OMNIPRESENT,
+	LAB_NODE_BUTTON_FIRST = LAB_NODE_BUTTON_CLOSE,
+	LAB_NODE_BUTTON_LAST = LAB_NODE_BUTTON_OMNIPRESENT,
+	LAB_NODE_BUTTON,
+
+	LAB_NODE_TITLEBAR,
+	LAB_NODE_TITLE,
+
+	LAB_NODE_CORNER_TOP_LEFT,
+	LAB_NODE_CORNER_TOP_RIGHT,
+	LAB_NODE_CORNER_BOTTOM_RIGHT,
+	LAB_NODE_CORNER_BOTTOM_LEFT,
+	LAB_NODE_BORDER_TOP,
+	LAB_NODE_BORDER_RIGHT,
+	LAB_NODE_BORDER_BOTTOM,
+	LAB_NODE_BORDER_LEFT,
+	LAB_NODE_BORDER,
+
+	LAB_NODE_CLIENT,
+	LAB_NODE_FRAME,
+	LAB_NODE_ROOT,
+	LAB_NODE_MENU,
+	LAB_NODE_OSD,
+	LAB_NODE_LAYER_SURFACE,
+	LAB_NODE_LAYER_SUBSURFACE,
+	LAB_NODE_UNMANAGED,
+	LAB_NODE_ALL,
+};
+
+enum lab_node_type node_type_parse(const char *context);
+
+bool node_type_contains(enum lab_node_type whole, enum lab_node_type part);
+
+enum lab_edge node_type_to_edges(enum lab_node_type type);
+
+#endif /* LABWC_NODE_TYPE_H */