nsNativeThemeGTK.h

Enable keyboard shortcuts

/* -*- 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/. */

#ifndef _GTK_NSNATIVETHEMEGTK_H_

#define _GTK_NSNATIVETHEMEGTK_H_

#include "Theme.h"

class nsNativeThemeGTK final : public mozilla::widget::Theme {

  using Theme = mozilla::widget::Theme;

 public:

  // The nsITheme interface.

  void DrawWidgetBackground(gfxContext*, nsIFrame*, StyleAppearance,

                            const nsRect& aRect, const nsRect& aDirtyRect,

                            DrawOverflow) override;

  bool CreateWebRenderCommandsForWidget(

      mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&,

      const mozilla::layers::StackingContextHelper&,

      mozilla::layers::RenderRootStateManager*, nsIFrame*, StyleAppearance,

      const nsRect&) override;

  [[nodiscard]] LayoutDeviceIntMargin GetWidgetBorder(nsDeviceContext*,

                                                      nsIFrame*,

                                                      StyleAppearance) override;

  bool GetWidgetPadding(nsDeviceContext*, nsIFrame*, StyleAppearance,

                        LayoutDeviceIntMargin*) override;

  bool GetWidgetOverflow(nsDeviceContext*, nsIFrame*, StyleAppearance,

                         nsRect*) override;

  // Whether we draw a non-native widget.

//

  // We always draw scrollbars as non-native so that all of Firefox has

  // consistent scrollbar styles both in chrome and content (plus, the

  // non-native scrollbars support scrollbar-width, auto-darkening...).

//

  // We draw other widgets as non-native when their color-scheme doesn't match

  // the current GTK theme's color-scheme. We do that because frequently

  // switching GTK themes at runtime is prohibitively expensive. In that case

  // (`BecauseColorMismatch`) we don't call into the non-native theme for sizing

  // information (GetWidgetPadding/Border and GetMinimumWidgetSize), to avoid

  // subtle sizing changes. The non-native theme can basically draw at any size,

  // so we prefer to have consistent sizing information.

  enum class NonNative { No, Always, BecauseColorMismatch };

  static bool IsWidgetAlwaysNonNative(nsIFrame*, StyleAppearance);

  NonNative IsWidgetNonNative(nsIFrame*, StyleAppearance);

  mozilla::LayoutDeviceIntSize GetMinimumWidgetSize(nsPresContext*, nsIFrame*,

                                                    StyleAppearance) override;

  bool WidgetAttributeChangeRequiresRepaint(StyleAppearance,

                                            nsAtom* aAttribute) override;

  bool ThemeSupportsWidget(nsPresContext*, nsIFrame*, StyleAppearance) override;

  bool WidgetIsContainer(StyleAppearance) override;

  bool ThemeDrawsFocusForWidget(nsIFrame*, StyleAppearance) override;

  Transparency GetWidgetTransparency(nsIFrame*, StyleAppearance) override;

  nsNativeThemeGTK();

 protected:

  virtual ~nsNativeThemeGTK();

};

#endif