webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebCore/mathml/MathMLAnnotationElement.cpp b/Source/WebCore/mathml/MathMLAnnotationElement.cpp
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+++ b/Source/WebCore/mathml/MathMLAnnotationElement.cpp
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+/*
+ * Copyright (C) 2016 Igalia S.L. 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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 "MathMLAnnotationElement.h"
+
+#if ENABLE(MATHML)
+
+#include "HTMLHtmlElement.h"
+#include "MathMLMathElement.h"
+#include "MathMLNames.h"
+#include "MathMLSelectElement.h"
+#include "RenderMathMLBlock.h"
+#include "SVGSVGElement.h"
+
+namespace WebCore {
+
+using namespace MathMLNames;
+
+MathMLAnnotationElement::MathMLAnnotationElement(const QualifiedName& tagName, Document& document)
+    : MathMLPresentationElement(tagName, document)
+{
+    ASSERT(hasTagName(annotationTag) || hasTagName(annotation_xmlTag));
+}
+
+Ref<MathMLAnnotationElement> MathMLAnnotationElement::create(const QualifiedName& tagName, Document& document)
+{
+    return adoptRef(*new MathMLAnnotationElement(tagName, document));
+}
+
+RenderPtr<RenderElement> MathMLAnnotationElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition& insertionPosition)
+{
+    if (hasTagName(MathMLNames::annotationTag))
+        return MathMLElement::createElementRenderer(WTFMove(style), insertionPosition);
+
+    ASSERT(hasTagName(annotation_xmlTag));
+    return createRenderer<RenderMathMLBlock>(*this, WTFMove(style));
+}
+
+bool MathMLAnnotationElement::childShouldCreateRenderer(const Node& child) const
+{
+    // For <annotation>, only text children are allowed.
+    if (hasTagName(MathMLNames::annotationTag))
+        return child.isTextNode();
+
+    // For <annotation-xml>, we follow these definitions from the HTML5 RelaxNG schema:
+    // - annotation-xml.model.mathml
+    // - annotation-xml.model.svg
+    // - annotation-xml.model.xhtml
+
+    ASSERT(hasTagName(annotation_xmlTag));
+    auto& value = attributeWithoutSynchronization(encodingAttr);
+
+    if (is<MathMLElement>(child) && (MathMLSelectElement::isMathMLEncoding(value) || MathMLSelectElement::isHTMLEncoding(value))) {
+        auto& mathmlElement = downcast<MathMLElement>(child);
+        return is<MathMLMathElement>(mathmlElement);
+    }
+
+    if (is<SVGElement>(child) && (MathMLSelectElement::isSVGEncoding(value) || MathMLSelectElement::isHTMLEncoding(value))) {
+        auto& svgElement = downcast<SVGElement>(child);
+        return is<SVGSVGElement>(svgElement);
+    }
+
+    if (is<HTMLElement>(child) && MathMLSelectElement::isHTMLEncoding(value)) {
+        auto& htmlElement = downcast<HTMLElement>(child);
+        return is<HTMLHtmlElement>(htmlElement) || (isFlowContent(htmlElement) && StyledElement::childShouldCreateRenderer(child));
+    }
+
+    return false;
+}
+
+void MathMLAnnotationElement::attributeChanged(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue, AttributeModificationReason reason)
+{
+    if (name == MathMLNames::srcAttr || name == MathMLNames::encodingAttr) {
+        auto* parent = parentElement();
+        if (is<MathMLElement>(parent) && parent->hasTagName(semanticsTag))
+            downcast<MathMLElement>(*parent).updateSelectedChild();
+    }
+    MathMLPresentationElement::attributeChanged(name, oldValue, newValue, reason);
+}
+
+}
+
+#endif // ENABLE(MATHML)