gecko-dev/widget/gtk/nsClipboardX11.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
 */
/* 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 __nsClipboardX11_h_
#define __nsClipboardX11_h_

#include <gtk/gtk.h>

#include "mozilla/Maybe.h"
#include "nsClipboard.h"

class nsRetrievalContextX11 : public nsRetrievalContext {
 public:
  enum class State { Initial, Completed, TimedOut };

  ClipboardData GetClipboardData(const char* aMimeType,
                                 int32_t aWhichClipboard) override;
  mozilla::GUniquePtr<char> GetClipboardText(int32_t aWhichClipboard) override;

  ClipboardTargets GetTargets(int32_t aWhichClipboard) override;

  bool HasSelectionSupport(void) override;

  // Call this when data or text has been retrieved.
  void Complete(ClipboardDataType aDataType, const void* aData,
                int aDataRequestNumber);

  nsRetrievalContextX11();

 private:
  ClipboardData WaitForClipboardData(ClipboardDataType aDataType,
                                     int32_t aWhichClipboard,
                                     const char* aMimeType = nullptr);

  /**
   * Spins X event loop until timing out or being completed. Returns
   * null if we time out, otherwise returns the completed data (passing
   * ownership to caller).
   */
  ClipboardData WaitForX11Content();

  State mState = State::Initial;
  int mClipboardRequestNumber = 0;
  mozilla::Maybe<ClipboardData> mClipboardData;
  GdkAtom mTargetMIMEType;
};

class ClipboardRequestHandler {
 public:
  ClipboardRequestHandler(nsRetrievalContextX11* aContext,
                          ClipboardDataType aDataType, int aDataRequestNumber)
      : mContext(aContext),
        mDataRequestNumber(aDataRequestNumber),
        mDataType(aDataType) {}

  void Complete(const void* aData) {
    mContext->Complete(mDataType, aData, mDataRequestNumber);
  }

 private:
  nsRetrievalContextX11* mContext;
  int mDataRequestNumber;
  ClipboardDataType mDataType;
};

#endif /* __nsClipboardX11_h_ */