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+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "HTMLElement.h"
+#include "MediaQueryEvaluator.h"
+
+namespace WebCore {
+
+class HTMLPictureElement final : public HTMLElement {
+public:
+ static Ref<HTMLPictureElement> create(const QualifiedName&, Document&);
+ virtual ~HTMLPictureElement();
+
+ void sourcesChanged();
+
+ void clearViewportDependentResults() { m_viewportDependentMediaQueryResults.clear(); }
+ bool hasViewportDependentResults() const { return m_viewportDependentMediaQueryResults.size(); }
+ Vector<MediaQueryResult>& viewportDependentResults() { return m_viewportDependentMediaQueryResults; }
+
+ bool viewportChangeAffectedPicture() const;
+
+ WeakPtr<HTMLPictureElement> createWeakPtr() { return m_weakFactory.createWeakPtr(); }
+
+private:
+ HTMLPictureElement(const QualifiedName&, Document&);
+
+ void didMoveToNewDocument(Document& oldDocument) final;
+
+ WeakPtrFactory<HTMLPictureElement> m_weakFactory { this };
+ Vector<MediaQueryResult> m_viewportDependentMediaQueryResults;
+};
+
+} // namespace WebCore