SkPDF: PDFStream has-a not is-a PDFDict

src/pdf/SkPDFStream.h

-/*
- * Copyright 2010 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkPDFStream_DEFINED
-#define SkPDFStream_DEFINED
-
-#include "SkPDFTypes.h"
-#include "SkStream.h"
-
-/** \class SkPDFStream
-
-    A stream object in a PDF.  Note, all streams must be indirect objects (via
-    SkObjRef).
-*/
-class SkPDFStream : public SkPDFDict {
-
-public:
-    /** Create a PDF stream. A Length entry is automatically added to the
-     *  stream dictionary.
-     *  @param data   The data part of the stream. */
-    explicit SkPDFStream(sk_sp<SkData> data) {
-        this->setData(std::unique_ptr<SkStreamAsset>(
-                              new SkMemoryStream(std::move(data))));
-    }
-
-    /** Create a PDF stream. A Length entry is automatically added to the
-     *  stream dictionary.
-     *  @param stream The data part of the stream.
-     */
-    explicit SkPDFStream(std::unique_ptr<SkStreamAsset> stream) {
-        this->setData(std::move(stream));
-    }
-
-    virtual ~SkPDFStream();
-
-    // The SkPDFObject interface.
-    void emitObject(SkWStream* stream,
-                    const SkPDFObjNumMap& objNumMap,
-                    const SkPDFSubstituteMap& substitutes) const override;
-    void drop() override;
-
-protected:
-    /* Create a PDF stream with no data.  The setData method must be called to
-     * set the data.
-     */
-    SkPDFStream() {}
-
-    /** Only call this function once. */
-    void setData(std::unique_ptr<SkStreamAsset> stream);
-
-private:
-    std::unique_ptr<SkStreamAsset> fCompressedData;
-
-    typedef SkPDFDict INHERITED;
-};
-
-#endif