/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsHtml5Speculation_h

#define nsHtml5Speculation_h

#include "nsHtml5OwningUTF16Buffer.h"

#include "nsAHtml5TreeBuilderState.h"

#include "nsHtml5TreeOperation.h"

#include "nsAHtml5TreeOpSink.h"

#include "nsTArray.h"

#include "nsAutoPtr.h"

#include "mozilla/Attributes.h"

class nsHtml5Speculation final : public nsAHtml5TreeOpSink

{

public:

  nsHtml5Speculation(nsHtml5OwningUTF16Buffer* aBuffer,

                     int32_t aStart,

                     int32_t aStartLineNumber,

                     nsAHtml5TreeBuilderState* aSnapshot);

  ~nsHtml5Speculation();

  nsHtml5OwningUTF16Buffer* GetBuffer() { return mBuffer; }

  int32_t GetStart() { return mStart; }

  int32_t GetStartLineNumber() { return mStartLineNumber; }

  nsAHtml5TreeBuilderState* GetSnapshot() { return mSnapshot; }

  /**

   * Flush the operations from the tree operations from the argument

   * queue unconditionally.

   */

  virtual void MoveOpsFrom(nsTArray<nsHtml5TreeOperation>& aOpQueue) override;

  void FlushToSink(nsAHtml5TreeOpSink* aSink);

private:

  /**

   * The first buffer in the pending UTF-16 buffer queue

   */

  RefPtr<nsHtml5OwningUTF16Buffer> mBuffer;

  /**

   * The start index of this speculation in the first buffer

   */

  int32_t mStart;

  /**

   * The current line number at the start of the speculation

   */

  int32_t mStartLineNumber;

  nsAutoPtr<nsAHtml5TreeBuilderState> mSnapshot;

  nsTArray<nsHtml5TreeOperation> mOpQueue;

};

#endif // nsHtml5Speculation_h