/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

// This defines a common base class for nsITheme implementations, to reduce
// code duplication.

#ifndef NSNATIVETHEME_H_
#define NSNATIVETHEME_H_

#include "nsAtom.h"
#include "nsColor.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsMargin.h"
#include "nsGkAtoms.h"
#include "nsTArray.h"
#include "nsINamed.h"
#include "nsITimer.h"
#include "nsIContent.h"
#include "mozilla/dom/RustTypes.h"

class nsIFrame;
class nsPresContext;

namespace mozilla {
class ComputedStyle;
enum class StyleAppearance : uint8_t;
}  // namespace mozilla

class nsNativeTheme : public nsITimerCallback, public nsINamed {
 protected:
  virtual ~nsNativeTheme() = default;

  NS_DECL_ISUPPORTS
  NS_DECL_NSITIMERCALLBACK
  NS_DECL_NSINAMED

  nsNativeTheme();

 public:
  enum ScrollbarButtonType {
    eScrollbarButton_UpTop = 0,
    eScrollbarButton_Down = 1 << 0,
    eScrollbarButton_Bottom = 1 << 1
  };

  // Returns the content state (hover, focus, etc), see EventStateManager.h
  static mozilla::dom::ElementState GetContentState(
      nsIFrame* aFrame, mozilla::StyleAppearance aAppearance);

  // Returns whether the widget is already styled by content
  // Normally called from ThemeSupportsWidget to turn off native theming
  // for elements that are already styled.
  bool IsWidgetStyled(nsPresContext* aPresContext, nsIFrame* aFrame,
                      mozilla::StyleAppearance aAppearance);

  // RTL chrome direction
  static bool IsFrameRTL(nsIFrame* aFrame);

  static bool IsHTMLContent(nsIFrame* aFrame);

  // button:
  bool IsDefaultButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::_default);
  }

  bool IsButtonTypeMenu(nsIFrame* aFrame);

  bool IsOpenButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::open);
  }

  // progressbar:
  bool IsVerticalProgress(nsIFrame* aFrame);

  // meter:
  bool IsVerticalMeter(nsIFrame* aFrame);

  static bool CheckBooleanAttr(nsIFrame* aFrame, nsAtom* aAtom);

  // Helpers for progressbar.
  static double GetProgressValue(nsIFrame* aFrame);
  static double GetProgressMaxValue(nsIFrame* aFrame);

  bool QueueAnimatedContentForRefresh(nsIContent* aContent,
                                      uint32_t aMinimumFrameRate);

  nsIFrame* GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
                                                      bool aNextSibling);

  bool IsRangeHorizontal(nsIFrame* aFrame);

  static bool IsDarkBackgroundForScrollbar(nsIFrame*);
  static bool IsDarkBackground(nsIFrame*);

  static bool IsWidgetScrollbarPart(mozilla::StyleAppearance);
  static bool IsWidgetAlwaysNonNative(nsIFrame*, mozilla::StyleAppearance);

 private:
  uint32_t mAnimatedContentTimeout;
  nsCOMPtr<nsITimer> mAnimatedContentTimer;
  AutoTArray<nsCOMPtr<nsIContent>, 20> mAnimatedContentList;
};

#endif  // NSNATIVETHEME_H_