[vala/0.50] libvaladoc: Add wrapper for "agedge" of graphviz

[Rico Tzschichholz <ricotz src gnome org>]

commit 1b43e6b2d2977ba699d15dac16f2643e95c3ad52
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Feb 7 11:02:02 2021 +0100

    libvaladoc: Add wrapper for "agedge" of graphviz

 libvaladoc/charts/simplechartfactory.vala |  5 ++++-
 libvaladoc/gvc-compat.c                   | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
---
diff --git a/libvaladoc/charts/simplechartfactory.vala b/libvaladoc/charts/simplechartfactory.vala
index ddacbf0f4..9588be380 100644
--- a/libvaladoc/charts/simplechartfactory.vala
+++ b/libvaladoc/charts/simplechartfactory.vala
@@ -23,6 +23,9 @@
 [CCode (cname = "valadoc_compat_gvc_graph_new")]
 extern Gvc.Graph valadoc_gvc_graph_new (string name);
 
+[CCode (cname = "valadoc_compat_gvc_graph_create_edge")]
+extern Gvc.Edge valadoc_gvc_graph_create_edge (Gvc.Graph graph, Gvc.Node from, Gvc.Node to);
+
 public class Valadoc.Charts.SimpleFactory : Charts.Factory {
        protected virtual Gvc.Node configure_type (Gvc.Node node, Api.Node item) {
                node.safe_set ("shape", "box", "");
@@ -75,7 +78,7 @@ public class Valadoc.Charts.SimpleFactory : Charts.Factory {
        }
 
        public override Gvc.Edge add_children (Gvc.Graph graph, Gvc.Node parent, Gvc.Node child) {
-               var edge = graph.create_edge (parent, child);
+               var edge = valadoc_gvc_graph_create_edge (graph, parent, child);
                edge.safe_set ("dir", "back", "");
                return edge;
        }
diff --git a/libvaladoc/gvc-compat.c b/libvaladoc/gvc-compat.c
index 962f74965..584633463 100644
--- a/libvaladoc/gvc-compat.c
+++ b/libvaladoc/gvc-compat.c
@@ -33,6 +33,9 @@ valadoc_compat_gvc_graph_create_node (Agraph_t* graph, const char *name);
 Agraph_t*
 valadoc_compat_gvc_graph_new (const char *name);
 
+Agedge_t*
+valadoc_compat_gvc_graph_create_edge (Agraph_t* graph, Agnode_t* from, Agnode_t* to);
+
 void
 valadoc_compat_gvc_init (void)
 {
@@ -60,3 +63,13 @@ valadoc_compat_gvc_graph_new (const char *name)
        return agopen ((char*) name, AGDIGRAPH);
 #endif
 }
+
+Agedge_t*
+valadoc_compat_gvc_graph_create_edge (Agraph_t* graph, Agnode_t* from, Agnode_t* to)
+{
+#ifdef WITH_CGRAPH
+       return agedge (graph, from, to, NULL, TRUE);
+#else
+       return agedge (graph, from, to);
+#endif
+}