webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebCore/rendering/TextAutoSizing.h b/Source/WebCore/rendering/TextAutoSizing.h
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+++ b/Source/WebCore/rendering/TextAutoSizing.h
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+/*
+ * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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. AND ITS 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 APPLE INC. OR ITS 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
+
+#if ENABLE(TEXT_AUTOSIZING)
+
+#include "RenderStyle.h"
+#include <wtf/HashSet.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class Document;
+class Text;
+
+// FIXME: We can probably get rid of this class entirely and use std::unique_ptr<RenderStyle> as key
+// as long as we use the right hash traits.
+class TextAutoSizingKey {
+public:
+    TextAutoSizingKey() = default;
+    enum DeletedTag { Deleted };
+    explicit TextAutoSizingKey(DeletedTag);
+    TextAutoSizingKey(const RenderStyle&, unsigned hash);
+
+    const RenderStyle* style() const { ASSERT(!isDeleted()); return m_style.get(); }
+    bool isDeleted() const { return HashTraits<std::unique_ptr<RenderStyle>>::isDeletedValue(m_style); }
+
+    unsigned hash() const { return m_hash; }
+
+private:
+    std::unique_ptr<RenderStyle> m_style;
+    unsigned m_hash { 0 };
+};
+
+inline bool operator==(const TextAutoSizingKey& a, const TextAutoSizingKey& b)
+{
+    if (a.isDeleted() || b.isDeleted())
+        return false;
+    if (!a.style() || !b.style())
+        return a.style() == b.style();
+    return a.style()->equalForTextAutosizing(*b.style());
+}
+
+struct TextAutoSizingHash {
+    static unsigned hash(const TextAutoSizingKey& key) { return key.hash(); }
+    static bool equal(const TextAutoSizingKey& a, const TextAutoSizingKey& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
+
+struct TextAutoSizingHashTranslator {
+    static unsigned hash(const RenderStyle& style)
+    {
+        return style.hashForTextAutosizing();
+    }
+
+    static bool equal(const TextAutoSizingKey& key, const RenderStyle& style)
+    {
+        if (key.isDeleted() || !key.style())
+            return false;
+        return key.style()->equalForTextAutosizing(style);
+    }
+
+    static void translate(TextAutoSizingKey& key, const RenderStyle& style, unsigned hash)
+    {
+        key = { style, hash };
+    }
+};
+
+class TextAutoSizingValue {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    TextAutoSizingValue() = default;
+    ~TextAutoSizingValue();
+
+    void addTextNode(Text&, float size);
+
+    enum class StillHasNodes { No, Yes };
+    StillHasNodes adjustTextNodeSizes();
+
+private:
+    void reset();
+
+    HashSet<RefPtr<Text>> m_autoSizedNodes;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(TEXT_AUTOSIZING)