webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebCore/mathml/MathMLTokenElement.cpp b/Source/WebCore/mathml/MathMLTokenElement.cpp
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+++ b/Source/WebCore/mathml/MathMLTokenElement.cpp
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+/*
+ * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2016 Igalia S.L.
+ *
+ * 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 "MathMLTokenElement.h"
+
+#if ENABLE(MATHML)
+
+#include "MathMLNames.h"
+#include "RenderMathMLToken.h"
+
+namespace WebCore {
+
+using namespace MathMLNames;
+
+MathMLTokenElement::MathMLTokenElement(const QualifiedName& tagName, Document& document)
+    : MathMLPresentationElement(tagName, document)
+{
+    setHasCustomStyleResolveCallbacks();
+}
+
+Ref<MathMLTokenElement> MathMLTokenElement::create(const QualifiedName& tagName, Document& document)
+{
+    return adoptRef(*new MathMLTokenElement(tagName, document));
+}
+
+void MathMLTokenElement::didAttachRenderers()
+{
+    MathMLPresentationElement::didAttachRenderers();
+    auto* mathmlRenderer = renderer();
+    if (is<RenderMathMLToken>(mathmlRenderer))
+        downcast<RenderMathMLToken>(*mathmlRenderer).updateTokenContent();
+}
+
+void MathMLTokenElement::childrenChanged(const ChildChange& change)
+{
+    MathMLPresentationElement::childrenChanged(change);
+    auto* mathmlRenderer = renderer();
+    if (is<RenderMathMLToken>(mathmlRenderer))
+        downcast<RenderMathMLToken>(*mathmlRenderer).updateTokenContent();
+}
+
+RenderPtr<RenderElement> MathMLTokenElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
+{
+    ASSERT(hasTagName(MathMLNames::miTag) || hasTagName(MathMLNames::mnTag) || hasTagName(MathMLNames::msTag) || hasTagName(MathMLNames::mtextTag));
+
+    return createRenderer<RenderMathMLToken>(*this, WTFMove(style));
+}
+
+bool MathMLTokenElement::childShouldCreateRenderer(const Node& child) const
+{
+    // The HTML specification defines <mi>, <mo>, <mn>, <ms> and <mtext> as insertion points.
+    return isPhrasingContent(child) && StyledElement::childShouldCreateRenderer(child);
+}
+
+std::optional<UChar32> MathMLTokenElement::convertToSingleCodePoint(StringView string)
+{
+    auto codePoints = stripLeadingAndTrailingWhitespace(string).codePoints();
+    auto iterator = codePoints.begin();
+    if (iterator == codePoints.end())
+        return std::nullopt;
+    std::optional<UChar32> character = *iterator;
+    ++iterator;
+    return iterator == codePoints.end() ? character : std::nullopt;
+}
+
+}
+
+#endif // ENABLE(MATHML)