// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_OZONE_PLATFORM_X11_X11_CLIPBOARD_OZONE_H_
#define UI_OZONE_PLATFORM_X11_X11_CLIPBOARD_OZONE_H_

#include <memory>
#include <string>

#include "base/functional/callback.h"
#include "ui/base/clipboard/clipboard_buffer.h"
#include "ui/ozone/public/platform_clipboard.h"

namespace ui {

class XClipboardHelper;

// Handles clipboard operations for X11.
// Registers to receive standard X11 events, as well as
// XFixesSetSelectionOwnerNotify.  When the remote owner changes, TARGETS and
// text/plain are preemptively fetched.  They can then be provided immediately
// to GetAvailableMimeTypes, and RequestClipboardData when mime_type is
// text/plain.  Otherwise GetAvailableMimeTypes and RequestClipboardData call
// the appropriate X11 functions and invoke callbacks when the associated events
// are received.
class X11ClipboardOzone : public PlatformClipboard {
 public:
  X11ClipboardOzone();
  X11ClipboardOzone(const X11ClipboardOzone&) = delete;
  X11ClipboardOzone& operator=(const X11ClipboardOzone&) = delete;
  ~X11ClipboardOzone() override;

  // PlatformClipboard:
  void OfferClipboardData(
      ClipboardBuffer buffer,
      const PlatformClipboard::DataMap& data_map,
      PlatformClipboard::OfferDataClosure callback) override;
  void RequestClipboardData(
      ClipboardBuffer buffer,
      const std::string& mime_type,
      PlatformClipboard::RequestDataClosure callback) override;
  void GetAvailableMimeTypes(
      ClipboardBuffer buffer,
      PlatformClipboard::GetMimeTypesClosure callback) override;
  bool IsSelectionOwner(ClipboardBuffer buffer) override;
  void SetClipboardDataChangedCallback(
      ClipboardDataChangedCallback data_changed_callback) override;
  bool IsSelectionBufferAvailable() const override;

 private:
  void OnSelectionChanged(ClipboardBuffer buffer);

  const std::unique_ptr<XClipboardHelper> helper_;

  ClipboardDataChangedCallback clipboard_changed_callback_;
};

}  // namespace ui

#endif  // UI_OZONE_PLATFORM_X11_X11_CLIPBOARD_OZONE_H_