webservices: Inherit the prefix only if parent and child namespaces match.

dlls/webservices/tests/writer.c

@@ -364,7 +364,7 @@ static void test_WsWriteStartElement(void)
 {
     HRESULT hr;
     WS_XML_WRITER *writer;
-    WS_XML_STRING prefix = {1, (BYTE *)"p"}, ns = {2, (BYTE *)"ns"};
+    WS_XML_STRING prefix = {1, (BYTE *)"p"}, ns = {2, (BYTE *)"ns"}, ns2 = {3, (BYTE *)"ns2"};
     WS_XML_STRING localname = {1, (BYTE *)"a"}, localname2 =  {1, (BYTE *)"b"};
 
     hr = WsCreateWriter( NULL, 0, &writer, NULL ) ;
@@ -404,21 +404,40 @@ static void test_WsWriteStartElement(void)
     hr = set_output( writer );
     ok( hr == S_OK, "got %08x\n", hr );
 
-    hr = WsWriteStartElement( writer, NULL, &localname, &ns, NULL );
+    hr = WsWriteStartElement( writer, &prefix, &localname, &ns, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
     check_output( writer, "", __LINE__ );
 
     hr = WsWriteStartElement( writer, NULL, &localname2, &ns, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
-    check_output( writer, "<a xmlns=\"ns\">", __LINE__ );
+    check_output( writer, "<p:a xmlns:p=\"ns\">", __LINE__ );
+
+    hr = WsWriteEndElement( writer, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+    check_output( writer, "<p:a xmlns:p=\"ns\"><p:b/>", __LINE__ );
+
+    hr = WsWriteEndElement( writer, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+    check_output( writer, "<p:a xmlns:p=\"ns\"><p:b/></p:a>", __LINE__ );
+
+    hr = set_output( writer );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = WsWriteStartElement( writer, &prefix, &localname, &ns, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+    check_output( writer, "", __LINE__ );
+
+    hr = WsWriteStartElement( writer, NULL, &localname2, &ns2, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+    check_output( writer, "<p:a xmlns:p=\"ns\">", __LINE__ );
 
     hr = WsWriteEndElement( writer, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
-    check_output( writer, "<a xmlns=\"ns\"><b/>", __LINE__ );
+    check_output( writer, "<p:a xmlns:p=\"ns\"><b xmlns=\"ns2\"/>", __LINE__ );
 
     hr = WsWriteEndElement( writer, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
-    check_output( writer, "<a xmlns=\"ns\"><b/></a>", __LINE__ );
+    check_output( writer, "<p:a xmlns:p=\"ns\"><b xmlns=\"ns2\"/></p:a>", __LINE__ );
 
     WsFreeWriter( writer );
 }

dlls/webservices/writer.c

@@ -929,8 +929,11 @@ static HRESULT write_add_element_node( struct writer *writer, const WS_XML_STRIN
 
     if (!(parent = find_parent( writer->current ))) return WS_E_INVALID_FORMAT;
 
-    if (!prefix && node_type( writer->current ) == WS_XML_NODE_TYPE_ELEMENT)
-        prefix = writer->current->hdr.prefix;
+    if (!prefix && node_type( parent ) == WS_XML_NODE_TYPE_ELEMENT)
+    {
+        elem = &parent->hdr;
+        if (WsXmlStringEquals( ns, elem->ns, NULL ) == S_OK) prefix = elem->prefix;
+    }
 
     if (!(node = alloc_node( WS_XML_NODE_TYPE_ELEMENT ))) return E_OUTOFMEMORY;
     elem = &node->hdr;