libgvc: add subgraph functionality and add name attribute for Gvc.Node

Fixes bug 622233.

diff --git a/vapi/libgvc.vapi b/vapi/libgvc.vapi
index 36da041802db71ac5f1608fbebc4247a522221db..b5aabc5d71ad0a8ea97b6e355b764d95585f884c 100644 (file)
--- a/vapi/libgvc.vapi
+++ b/vapi/libgvc.vapi
@@ -96,6 +96,9 @@ namespace Gvc {
        [Compact]
        [CCode (cname = "Agnode_t", ref_function = "", unref_function = "", free_function = "")]
        public class Node {
+               [CCode (cname = "name")]
+               public string name;
+
                [CCode (cname = "agget")]
                public unowned string? get ([CCode (type = "char*")] string attribute_name);
 
@@ -137,6 +140,29 @@ namespace Gvc {
                [CCode (cname = "agedge")]
                public Edge create_edge (Node from, Node to);
 
+               /** Note: name set to "null" creates an anonymous subgraph. */
+               [CCode (cname = "agsubg")]
+               public unowned Graph create_subgraph ([CCode (type = "char*")] string? name);
+
+               [CCode (cname = "agfindsubg")]
+               public Graph find_subgraph ([CCode (type = "char*")] string name);
+
+               [CCode (cname = "agidsubg")]
+               public Graph create_subgraph_id (ulong id);
+
+               [CCode (cname = "agfstsubg")]
+               public Graph get_first_subgraph ();
+
+               [CCode (cname = "agnxtsubg")]
+               public Graph get_next_subgraph ();
+
+               [CCode (cname = "agparent")]
+               public Graph get_parent_graph ();
+
+               /** Note: agclose() is also allowed for subgraphs and has the same effect as agdelsubg(). */
+               [CCode (cname = "agdelsubg")]
+               public int delete_subgraph (Graph subgraph);
+
                [CCode (cname = "agfindnode")]
                public Node? find_node ([CCode (type = "char*")] string node_name);