1 files changed, 74 insertions, 0 deletions
diff --git a/Source/WebCore/html/HTMLPictureElement.cpp b/Source/WebCore/html/HTMLPictureElement.cpp
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+++ b/Source/WebCore/html/HTMLPictureElement.cpp
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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. 
+ */
+
+#include "config.h"
+#include "HTMLPictureElement.h"
+
+#include "ElementChildIterator.h"
+#include "HTMLImageElement.h"
+
+namespace WebCore {
+
+HTMLPictureElement::HTMLPictureElement(const QualifiedName& tagName, Document& document)
+    : HTMLElement(tagName, document)
+{
+}
+
+HTMLPictureElement::~HTMLPictureElement()
+{
+    document().removeViewportDependentPicture(*this);
+}
+
+void HTMLPictureElement::didMoveToNewDocument(Document& oldDocument)
+{
+    oldDocument.removeViewportDependentPicture(*this);
+    HTMLElement::didMoveToNewDocument(oldDocument);
+    sourcesChanged();
+}
+
+Ref<HTMLPictureElement> HTMLPictureElement::create(const QualifiedName& tagName, Document& document)
+{
+    return adoptRef(*new HTMLPictureElement(tagName, document));
+}
+
+void HTMLPictureElement::sourcesChanged()
+{
+    for (auto& element : childrenOfType<HTMLImageElement>(*this))
+        element.selectImageSource();
+}
+
+bool HTMLPictureElement::viewportChangeAffectedPicture() const
+{
+    auto* documentElement = document().documentElement();
+    MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
+    for (auto& result : m_viewportDependentMediaQueryResults) {
+        if (evaluator.evaluate(result.expression) != result.result)
+            return true;
+    }
+    return false;
+}
+
+}
+