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 "nsITheme.h"

#include "nsCOMPtr.h"

#include "nsAtom.h"

#include "Theme.h"

#include <gtk/gtk.h>

#include "gtkdrawing.h"

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

  using Theme = mozilla::widget::Theme;

 public:

  // The nsITheme interface.

  NS_IMETHOD DrawWidgetBackground(gfxContext* aContext, nsIFrame* aFrame,

                                  StyleAppearance aAppearance,

                                  const nsRect& aRect, const nsRect& aDirtyRect,

                                  DrawOverflow) override;

  bool CreateWebRenderCommandsForWidget(

      mozilla::wr::DisplayListBuilder& aBuilder,

      mozilla::wr::IpcResourceUpdateQueue& aResources,

      const mozilla::layers::StackingContextHelper& aSc,

      mozilla::layers::RenderRootStateManager* aManager, nsIFrame*,

      StyleAppearance, const nsRect& aRect) override;

  [[nodiscard]] LayoutDeviceIntMargin GetWidgetBorder(

      nsDeviceContext* aContext, nsIFrame* aFrame,

      StyleAppearance aAppearance) override;

  bool GetWidgetPadding(nsDeviceContext* aContext, nsIFrame* aFrame,

                        StyleAppearance aAppearance,

                        LayoutDeviceIntMargin* aResult) override;

  bool GetWidgetOverflow(nsDeviceContext* aContext, nsIFrame* aFrame,

                         StyleAppearance aAppearance,

                         nsRect* aOverflowRect) 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* aPresContext, nsIFrame* aFrame,

      StyleAppearance aAppearance) override;

  NS_IMETHOD WidgetStateChanged(nsIFrame* aFrame, StyleAppearance aAppearance,

                                nsAtom* aAttribute, bool* aShouldRepaint,

                                const nsAttrValue* aOldValue) override;

  NS_IMETHOD ThemeChanged() override;

  NS_IMETHOD_(bool)

  ThemeSupportsWidget(nsPresContext* aPresContext, nsIFrame* aFrame,

                      StyleAppearance aAppearance) override;

  NS_IMETHOD_(bool) WidgetIsContainer(StyleAppearance aAppearance) override;

  bool ThemeDrawsFocusForWidget(nsIFrame*, StyleAppearance) override;

  bool ThemeNeedsComboboxDropmarker() override;

  Transparency GetWidgetTransparency(nsIFrame*, StyleAppearance) override;

  nsNativeThemeGTK();

 protected:

  virtual ~nsNativeThemeGTK();

 private:

  GtkTextDirection GetTextDirection(nsIFrame* aFrame);

  gint GetTabMarginPixels(nsIFrame* aFrame);

  bool GetGtkWidgetAndState(StyleAppearance aAppearance, nsIFrame* aFrame,

                            WidgetNodeType& aGtkWidgetType,

                            GtkWidgetState* aState, gint* aWidgetFlags);

  mozilla::CSSIntMargin GetExtraSizeForWidget(nsIFrame*, StyleAppearance);

  void RefreshWidgetWindow(nsIFrame* aFrame);

  WidgetNodeType NativeThemeToGtkTheme(StyleAppearance aAppearance,

                                       nsIFrame* aFrame);

  uint8_t mDisabledWidgetTypes

      [(static_cast<size_t>(mozilla::StyleAppearance::Count) + 7) / 8];

  uint8_t

      mSafeWidgetStates[static_cast<size_t>(mozilla::StyleAppearance::Count) *

                        4];  // 32 bits per widget

  static const char* sDisabledEngines[];

  // Because moz_gtk_get_widget_border can be slow, we cache its results

  // by widget type.  Each bit in mBorderCacheValid says whether the

  // corresponding entry in mBorderCache is valid.

  mozilla::CSSIntMargin GetCachedWidgetBorder(nsIFrame* aFrame,

                                              StyleAppearance aAppearance,

                                              GtkTextDirection aDirection);

  uint8_t mBorderCacheValid[(MOZ_GTK_WIDGET_NODE_COUNT + 7) / 8];

  mozilla::CSSIntMargin mBorderCache[MOZ_GTK_WIDGET_NODE_COUNT];

};

#endif