1 files changed, 35 insertions, 0 deletions
diff --git a/dom/svg/nsSVGFeatures.cpp b/dom/svg/nsSVGFeatures.cpp
new file mode 100644
index 000000000..c7d3bf22a
--- /dev/null
+++ b/dom/svg/nsSVGFeatures.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * This file contains code to help implement the Conditional Processing
+ * section of the SVG specification (i.e. the <switch> element and the
+ * requiredFeatures, requiredExtensions and systemLanguage attributes).
+ *
+ *   http://www.w3.org/TR/SVG11/struct.html#ConditionalProcessing
+ */
+
+#include "nsSVGFeatures.h"
+#include "nsIContent.h"
+#include "nsIDocument.h"
+#include "nsNameSpaceManager.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+
+/*static*/ bool
+nsSVGFeatures::HasExtension(const nsAString& aExtension, const bool aIsInChrome)
+{
+#define SVG_SUPPORTED_EXTENSION(str) if (aExtension.EqualsLiteral(str)) return true;
+  SVG_SUPPORTED_EXTENSION("http://www.w3.org/1999/xhtml")
+  nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
+  if (aIsInChrome || !nameSpaceManager->mMathMLDisabled) {
+    SVG_SUPPORTED_EXTENSION("http://www.w3.org/1998/Math/MathML")
+  }
+#undef SVG_SUPPORTED_EXTENSION
+
+  return false;
+}