[seed: 7/15] Protect against multiple imports

[Robert Carr <racarr src gnome org>]

commit 8c714a8651697a258828c36e636c1b24d8245bc3
Author: Robert Carr <racarr mireia (none)>
Date:   Sat Apr 11 18:31:34 2009 -0400

    Protect against multiple imports
---
 libseed/seed-importer.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/libseed/seed-importer.c b/libseed/seed-importer.c
index 2551756..7620c44 100644
--- a/libseed/seed-importer.c
+++ b/libseed/seed-importer.c
@@ -9,6 +9,8 @@ JSClassRef gi_importer_class;
 JSObjectRef gi_importer;
 JSObjectRef gi_importer_versions;
 
+GHashTable *gi_imports;
+
 static void
 seed_gi_importer_handle_function (JSContextRef ctx,
 				  JSObjectRef namespace_ref,
@@ -252,8 +254,12 @@ seed_gi_importer_do_namespace (JSContextRef ctx,
   GError *e = NULL;
   guint n, i;
   
+  if (namespace_ref = g_hash_table_lookup (gi_imports, namespace))
+    {
+      return namespace_ref;
+    }
+  
   // TODO: Versions.
-  // TODO: Guard against multiple imports.
   if (!g_irepository_require (NULL, namespace,
 			      NULL, 0, &e))
     {
@@ -302,6 +308,8 @@ seed_gi_importer_do_namespace (JSContextRef ctx,
       g_base_info_unref (info);
     }
   
+  g_hash_table_insert (gi_imports, g_strdup(namespace), namespace_ref);
+  
   return namespace_ref;
   
 } 
@@ -399,5 +407,7 @@ void seed_initialize_importer(JSContextRef ctx,
   gi_importer = JSObjectMake (ctx, gi_importer_class, NULL);
   gi_importer_versions = JSObjectMake (ctx, gi_importer_class, NULL);
   
+  gi_imports = g_hash_table_new (g_str_hash, g_str_equal);
+  
   seed_object_set_property (ctx, global, "imports", importer);
 }