Refactoring XSLT

Source/core/xml/DocumentXSLT.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DocumentXSLT_h
+#define DocumentXSLT_h
+
+#include "core/dom/DocumentSupplementable.h"
+#include "platform/heap/Handle.h"
+#include "wtf/RefPtr.h"
+
+namespace blink {
+
+class Document;
+class EventListener;
+class ExecutionContext;
+class ProcessingInstruction;
+
+class DocumentXSLT final : public NoBaseWillBeGarbageCollected<DocumentXSLT>, public DocumentSupplement {
+    WTF_MAKE_NONCOPYABLE(DocumentXSLT);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DocumentXSLT);
+public:
+    Document* transformSourceDocument()
+    {
+        return m_transformSourceDocument.get();
+    }
+
+    void setTransformSourceDocument(Document* document)
+    {
+        ASSERT(document);
+        m_transformSourceDocument = document;
+    }
+
+    static DocumentXSLT& from(DocumentSupplementable&);
+    static const char* supplementName();
+
+    // The following static methods don't use any instance of DocumentXSLT.
+    // They are just using DocumentXSLT namespace.
+    static void applyXSLTransform(Document&, ProcessingInstruction*);
+    static ProcessingInstruction* findXSLStyleSheet(Document&);
+    static bool processingInstructionInsertedIntoDocument(Document&, ProcessingInstruction*);
+    static bool processingInstructionRemovedFromDocument(Document&, ProcessingInstruction*);
+    static bool sheetLoaded(Document&, ProcessingInstruction*);
+    static bool hasTransformSourceDocument(Document&);
+
+    virtual void trace(Visitor*) override;
+
+private:
+    DocumentXSLT();
+
+    RefPtrWillBeMember<Document> m_transformSourceDocument;
+};
+
+} // namespace blink
+
+#endif