Initial Implementation of Iframe Attribute for Feature Policy (Part 1)

third_party/WebKit/Source/core/html/HTMLIFrameElementAllow.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef HTMLIFrameElementAllow_h
+#define HTMLIFrameElementAllow_h
+
+#include "core/CoreExport.h"
+#include "core/dom/DOMTokenList.h"
+#include "platform/heap/Handle.h"
+#include "public/platform/WebFeaturePolicy.h"
+
+namespace blink {
+
+class HTMLIFrameElement;
+
+class CORE_EXPORT HTMLIFrameElementAllow final : public DOMTokenList,
+                                                 public DOMTokenListObserver {
+  USING_GARBAGE_COLLECTED_MIXIN(HTMLIFrameElementAllow);
+
+ public:
+  static HTMLIFrameElementAllow* create(HTMLIFrameElement* element) {
+    return new HTMLIFrameElementAllow(element);
+  }
+
+  ~HTMLIFrameElementAllow() override;
+
+  // Returns unique set of valid feature names.
+  Vector<WebFeaturePolicyFeature> parseAllowedFeatureNames(
+      String& invalidTokensErrorMessage) const;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  explicit HTMLIFrameElementAllow(HTMLIFrameElement*);
+  bool validateTokenValue(const AtomicString&, ExceptionState&) const override;
+
+  // DOMTokenListObserver.
+  void valueWasSet() override;
+
+  Member<HTMLIFrameElement> m_element;
+};
+
+}  // namespace blink
+
+#endif  // HTMLIFrameElementAllow_h