add a .keys() method to gst.Structure, plus test

Original commit message from CVS:
* gst/gst.defs:
* gst/gststructure.override:
* testsuite/test_struct.py:
add a .keys() method to gst.Structure, plus test

ChangeLog

@@ -1,3 +1,10 @@
+2005-09-20  Thomas Vander Stichele  <thomas at apestaart dot org>
+
+	* gst/gst.defs:
+	* gst/gststructure.override:
+	* testsuite/test_struct.py:
+	  add a .keys() method to gst.Structure, plus test
+
 2005-09-19  Thomas Vander Stichele  <thomas at apestaart dot org>
 
 	* gst/gst.defs:

common

@@ -1 +1 @@
-Subproject commit 13022c3cb4558d201e2ddf3e65d2e36b16eedc4a
+Subproject commit cd4da6a319d9f92d28f7b8a3b412577e6de50b64

gst/gst.defs

@@ -4457,6 +4457,13 @@
   )
 )
 
+(define-method keys
+  (of-object "GstStructure")
+  (c-name "gst_structure_keys")
+  (return-type "GList*")
+)
+
+
 (define-method get_boolean
   (of-object "GstStructure")
   (c-name "gst_structure_get_boolean")

gst/gststructure.override

@@ -166,6 +166,31 @@ _wrap_gst_structure_has_key(PyGObject *self, PyObject *args)
 	    
 	return PyBool_FromLong(has_field);
 }    
+
+%%
+override gst_structure_keys noargs
+static PyObject *
+_wrap_gst_structure_keys (PyObject *self)
+{
+    GstStructure *s;
+    int i, n;
+    PyObject *ret;
+
+
+    ret = PyList_New(0);
+
+    s = pyg_boxed_get(self, GstStructure);
+    n = gst_structure_n_fields(s);
+
+    for (i = 0; i < n; ++i) {
+        const gchar *name = gst_structure_nth_field_name (s, i);
+        PyList_Append(ret, PyString_FromString(name));
+    }
+
+    return ret;
+}
+
+
 %%
 override-slot GstStructure.tp_as_mapping
 static int

testsuite/test_struct.py

@@ -90,5 +90,14 @@ class StructureTest(unittest.TestCase):
         assert self.struct['pixel-aspect-ratio'].num == 2
         assert self.struct['pixel-aspect-ratio'].denom == 1
 
+    def testKeys(self):
+        k = self.struct.keys()
+        self.failUnless(k)
+        self.assertEquals(len(k), 4)
+        self.failUnless("width" in k)
+        self.failUnless("foo" in k)
+        self.failUnless("framerate" in k)
+        self.failUnless("pixel-aspect-ratio" in k)
+ 
 if __name__ == "__main__":
     unittest.main()