webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 92 insertions, 0 deletions

diff --git a/Source/WebCore/style/StyleUpdate.h b/Source/WebCore/style/StyleUpdate.h
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+/*
+ * Copyright (C) 2016 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
+
+#include "Node.h"
+#include "StyleChange.h"
+#include "StyleRelations.h"
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+#include <wtf/ListHashSet.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class ContainerNode;
+class Document;
+class Element;
+class Node;
+class RenderStyle;
+class Text;
+
+namespace Style {
+
+struct ElementUpdate {
+    ElementUpdate() = default;
+    ElementUpdate(std::unique_ptr<RenderStyle> style, Change change, bool recompositeLayer)
+        : style(WTFMove(style))
+        , change(change)
+        , recompositeLayer(recompositeLayer)
+    { }
+    std::unique_ptr<RenderStyle> style;
+    Change change { NoChange };
+    bool recompositeLayer { false };
+};
+
+class Update {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    Update(Document&);
+
+    const ListHashSet<ContainerNode*>& roots() const { return m_roots; }
+
+    const ElementUpdate* elementUpdate(const Element&) const;
+    ElementUpdate* elementUpdate(const Element&);
+
+    bool textUpdate(const Text&) const;
+
+    const RenderStyle* elementStyle(const Element&) const;
+    RenderStyle* elementStyle(const Element&);
+
+    const Document& document() const { return m_document; }
+
+    unsigned size() const { return m_elements.size() + m_texts.size(); }
+
+    void addElement(Element&, Element* parent, ElementUpdate&&);
+    void addText(Text&, Element* parent);
+    void addText(Text&);
+
+private:
+    void addPossibleRoot(Element*);
+
+    Document& m_document;
+    ListHashSet<ContainerNode*> m_roots;
+    HashMap<const Element*, ElementUpdate> m_elements;
+    HashSet<const Text*> m_texts;
+};
+
+}
+}