/* 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 mozilla_widget_WindowsUIUtils_h_
#define mozilla_widget_WindowsUIUtils_h_

#include "mozilla/Maybe.h"
#include "mozilla/MozPromise.h"
#include "nsColor.h"
#include "nsIWindowsUIUtils.h"
#include "nsString.h"

// Avoid including windef.h to get this, which improves
// build times.
typedef struct HWND__* HWND;

using SharePromise =
    mozilla::MozPromise<bool, nsresult, /* IsExclusive */ true>;

namespace mozilla {
enum class ColorScheme : uint8_t;
}

class WindowsUIUtils final : public nsIWindowsUIUtils {
 public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIWINDOWSUIUTILS

  WindowsUIUtils() = default;

  static RefPtr<SharePromise> Share(nsAutoString aTitle, nsAutoString aText,
                                    nsAutoString aUrl);

  // Why the Win11 tablet-mode state is being recomputed. Receiving an OS-level
  // ConvertibleSlateMode notification is itself evidence that the device is
  // tablet-capable, and so overrides a negative result from the capability
  // heuristic
  enum class TabletModeUpdateReason : uint8_t { Notification, LazyQuery };

  static void UpdateInWin10TabletMode();
  static void UpdateInWin11TabletMode(TabletModeUpdateReason);

  // Check whether we're in Win10 tablet mode.
  //
  // (Win10 tablet mode is considered sufficiently different from Win11 tablet
  // mode that there is no single getter to retrieve whether we're in a generic
  // "tablet mode".)
  static bool GetInWin10TabletMode();
  // Check whether we're in Win11 tablet mode.
  //
  // (Win11 tablet mode is considered sufficiently different from Win10 tablet
  // mode that there is no single getter to retrieve whether we're in a generic
  // "tablet mode".)
  static bool GetInWin11TabletMode();
  // Check whether this device can enter tablet mode at all. Unlike the
  // GetIn*TabletMode() getters, this is a stable property of the device rather
  // than a momentary state, so it's the right question to ask when deciding
  // whether to offer tablet-mode-related UI.
  static bool GetIsTabletCapable();

  // Gets the system accent color, or one of the darker / lighter variants
  // (darker = -1/2/3, lighter=+1/2/3, values outside of that range are
  // disallowed).
  static mozilla::Maybe<nscolor> GetAccentColor(int aTone = 0);
  static mozilla::Maybe<nscolor> GetSystemColor(mozilla::ColorScheme, int);

  // Use LookAndFeel for a cached getter.
  static bool ComputeOverlayScrollbars();
  static double ComputeTextScaleFactor();
  static bool ComputeTransparencyEffects();
  static void AssociateWithWinAppSDK(HWND aWnd);
  static void SetIsTitlebarCollapsed(HWND aWnd, bool aIsCollapsed);

 protected:
  ~WindowsUIUtils() = default;
};

#endif  // mozilla_widget_WindowsUIUtils_h_