blob: fa1ccf27571509810c7d859337afbb1adf16b749 [file] [log] [blame]
// Copyright (c) 2017 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.
#include <algorithm>
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/skia/include/core/SkStream.h"
namespace blink {
class SegmentReader;
class PLATFORM_EXPORT SegmentStream : public SkStream {
SegmentStream(const SegmentStream&) = delete;
SegmentStream& operator=(const SegmentStream&) = delete;
SegmentStream& operator=(SegmentStream&&);
~SegmentStream() override;
void SetReader(scoped_refptr<SegmentReader>);
// If a buffer has shrunk beyond the point we have read, it has been cleared.
// This allows clients to be aware of when data suddenly disappears.
bool IsCleared() const;
// From SkStream:
size_t read(void* buffer, size_t) override;
size_t peek(void* buffer, size_t) const override;
bool isAtEnd() const override;
bool rewind() override;
bool hasPosition() const override { return true; }
size_t getPosition() const override { return position_; }
bool seek(size_t position) override;
bool move(long offset) override;
bool hasLength() const override { return true; }
size_t getLength() const override;
scoped_refptr<SegmentReader> reader_;
size_t position_ = 0;
} // namespace blink