[valadoc] Add support for cgraphs

[Florian Brosch <flobrosch src gnome org>]

commit 7b22bc146b318790552aa8ec1ece25a3a06d1316
Author: Florian Brosch <flo brosch gmail com>
Date:   Wed Sep 11 00:43:43 2013 +0200

    Add support for cgraphs
    
    Based on patch by Richard Schwarting
    
    Fixes bug 703688.

 configure.ac                                  |   29 +++++++++++++++++++++++++
 src/doclets/devhelp/Makefile.am               |    1 +
 src/doclets/gtkdoc/Makefile.am                |    1 +
 src/doclets/htm/Makefile.am                   |   11 +++++++++
 src/libvaladoc/charts/chart.vala              |    2 +
 src/libvaladoc/charts/chartfactory.vala       |    4 +++
 src/libvaladoc/charts/simplechartfactory.vala |    4 +++
 7 files changed, 52 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 79aa766..d4d6390 100644
--- a/configure.ac
+++ b/configure.ac
@@ -53,6 +53,35 @@ AC_SUBST(LIBGEE_LIBS)
 
 
 
+AC_MSG_CHECKING([for CGRAPH])
+valadoc_tmp_LIBADD="$LIBADD"
+valadoc_tmp_CFLAGS="$CFLAGGS"
+LIBADD="$LIBADD $LIBGVC_LIBS"
+CFLAGS="$CFLAGS $LIBGVC_CFLAGS"
+AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([
+               #include <gvc.h>
+
+               int main(void) {
+                       #ifdef WITH_CGRAPH
+                               return 0;
+                       #else
+                               return -1;
+                       #endif
+               }
+       ])], [
+               AC_MSG_RESULT([yes])
+               VALAFLAGS="$VALAFLAGS -D WITH_CGRAPH"
+               have_cgraph=yes
+       ], [
+               AC_MSG_RESULT([no])
+               have_cgraph=no
+       ]
+)
+LIBADD="$valadoc_tmp_LIBADD"
+CFLAGS="$valadoc_tmp_CFLAGS"
+AM_CONDITIONAL(HAVE_CGRAPH, test "$have_cgraph" = "yes")
+
 
 ##
 ## Drivers:
diff --git a/src/doclets/devhelp/Makefile.am b/src/doclets/devhelp/Makefile.am
index e7c2446..de82ec1 100644
--- a/src/doclets/devhelp/Makefile.am
+++ b/src/doclets/devhelp/Makefile.am
@@ -4,6 +4,7 @@ NULL =
 AM_CFLAGS =  -g \
        -DPACKAGE_ICONDIR=\"$(datadir)/valadoc/icons/\" \
        -I ../../libvaladoc/ \
+       $(LIBGVC_CFLAGS) \
        $(GLIB_CFLAGS) \
        $(LIBGEE_CFLAGS) \
        $(NULL)
diff --git a/src/doclets/gtkdoc/Makefile.am b/src/doclets/gtkdoc/Makefile.am
index 66dcc55..81e3607 100644
--- a/src/doclets/gtkdoc/Makefile.am
+++ b/src/doclets/gtkdoc/Makefile.am
@@ -5,6 +5,7 @@ AM_CFLAGS =  -g \
        -DPACKAGE_ICONDIR=\"$(datadir)/valadoc/icons/\" \
        -I ../../libvaladoc/ \
        $(GLIB_CFLAGS) \
+       $(LIBGVC_CFLAGS) \
        $(LIBGEE_CFLAGS) \
        $(NULL)
 
diff --git a/src/doclets/htm/Makefile.am b/src/doclets/htm/Makefile.am
index 5f3be83..7127e1d 100644
--- a/src/doclets/htm/Makefile.am
+++ b/src/doclets/htm/Makefile.am
@@ -4,10 +4,21 @@ NULL =
 AM_CFLAGS =  -g \
        -DPACKAGE_ICONDIR=\"$(datadir)/valadoc/icons/\" \
        -I ../../libvaladoc/ \
+       $(LIBGVC_CFLAGS) \
        $(GLIB_CFLAGS) \
        $(LIBGEE_CFLAGS) \
        $(NULL)
 
+# Without the LIBGVC_CFLAGS, we get 
+# make[5]: Entering directory `/home/richard/.local/src/valadoc/src/doclets/devhelp'
+#  CC       doclet.lo
+# In file included from /usr/include/graphviz/gvc.h:17:0,
+#                  from ../../libvaladoc/valadoc-1.0.h:15,
+#                  from doclet.c:28:
+# /usr/include/graphviz/types.h:49:20: fatal error: cgraph.h: No such file or directory
+#  #include <cgraph.h>
+#                     ^
+# compilation terminated.
 
 
 BUILT_SOURCES = libdoclet.vala.stamp
diff --git a/src/libvaladoc/charts/chart.vala b/src/libvaladoc/charts/chart.vala
index f4b9908..03dab30 100644
--- a/src/libvaladoc/charts/chart.vala
+++ b/src/libvaladoc/charts/chart.vala
@@ -27,7 +27,9 @@ public class Valadoc.Charts.Chart : Api.Visitor {
        protected Factory factory;
 
        static construct {
+               #if !WITH_CGRAPH
                Gvc.init ();
+               #endif
        }
 
        public Chart (Factory factory, Api.Node node) {
diff --git a/src/libvaladoc/charts/chartfactory.vala b/src/libvaladoc/charts/chartfactory.vala
index 6a3351a..c2582ab 100644
--- a/src/libvaladoc/charts/chartfactory.vala
+++ b/src/libvaladoc/charts/chartfactory.vala
@@ -23,7 +23,11 @@
 
 public abstract class Valadoc.Charts.Factory : Object {
        protected Gvc.Node create_type (Gvc.Graph graph, Api.Node item) {
+               #if WITH_CGRAPH
+               return graph.create_node (item.get_full_name (), 1);
+               #else
                return graph.create_node (item.get_full_name ());
+               #endif
        }
 
        public abstract Gvc.Graph create_graph (Api.Node item);
diff --git a/src/libvaladoc/charts/simplechartfactory.vala b/src/libvaladoc/charts/simplechartfactory.vala
index a1f09fb..06da97e 100644
--- a/src/libvaladoc/charts/simplechartfactory.vala
+++ b/src/libvaladoc/charts/simplechartfactory.vala
@@ -31,7 +31,11 @@ public class Valadoc.Charts.SimpleFactory : Charts.Factory {
        }
 
        public override Gvc.Graph create_graph (Api.Node item) {
+               #if WITH_CGRAPH
+               var graph = new Gvc.Graph (item.get_full_name (), Gvc.Agdirected, 0);
+               #else
                var graph = new Gvc.Graph (item.get_full_name (), Gvc.GraphKind.AGDIGRAPH);
+               #endif
                return graph;
        }