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fune/widget/Theme.h
Emilio Cobos Álvarez de7b391af7 Bug 1749645 - Rename nsNativeBasicTheme{,Cocoa} to Theme{,Cocoa}. r=mstange 
We have this situation right now where all the themes are inheriting from
nsNativeBasicTheme. Rename it to a nicer name, and clean up some code while at
it.

In the future I'd like to simplify the inheritance chain to remove
nsNativeTheme altogether (so that all nsITheme implementations use
mozilla::widget::Theme).

That's not hard to do mechanically, but rather than dumping all of
nsNativeTheme into Theme I'd like to do it a bit more carefully, to hopefully
remove a lot of the helpers that nsNativeTheme has to deal with XUL and so on
and use something nicer. Eventually the inheritance chain will be something
like:

 * nsITheme : public nsISupports
 * Theme : public nsITheme, public nsITimerCallback, public nsINamed
 * ThemeCocoa : public Theme
 * nsNativeThemeCocoa : public ThemeCocoa
 * nsNativeThemeWin : public Theme
 * nsNativeThemeGtk : public Theme

Differential Revision: https://phabricator.services.mozilla.com/D135668
2022-01-12 16:33:31 +00:00

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/* -*- 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 mozilla_widget_Theme_h
#define mozilla_widget_Theme_h
#include "Units.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/gfx/Types.h"
#include "nsITheme.h"
#include "nsNativeTheme.h"
#include "ScrollbarDrawing.h"
namespace mozilla {
enum class StyleSystemColor : uint8_t;
namespace widget {
class Theme : protected nsNativeTheme, public nsITheme {
protected:
using sRGBColor = gfx::sRGBColor;
using DrawTarget = gfx::DrawTarget;
using Path = gfx::Path;
using Rect = gfx::Rect;
using Point = gfx::Point;
using RectCornerRadii = gfx::RectCornerRadii;
using Colors = ThemeColors;
using AccentColor = ThemeAccentColor;
public:
explicit Theme(UniquePtr<ScrollbarDrawing>&& aScrollbarDrawing)
: mScrollbarDrawing(std::move(aScrollbarDrawing)) {
mScrollbarDrawing->RecomputeScrollbarParams();
}
static void Init();
static void Shutdown();
static void LookAndFeelChanged();
using DPIRatio = CSSToLayoutDeviceScale;
NS_DECL_ISUPPORTS_INHERITED
// The nsITheme interface.
NS_IMETHOD DrawWidgetBackground(gfxContext* aContext, nsIFrame*,
StyleAppearance, const nsRect& aRect,
const nsRect& aDirtyRect,
DrawOverflow) override;
bool CreateWebRenderCommandsForWidget(
wr::DisplayListBuilder& aBuilder, wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
layers::RenderRootStateManager* aManager, nsIFrame*, StyleAppearance,
const nsRect& aRect) override;
// PaintBackendData will be either a DrawTarget, or a WebRenderBackendData.
//
// The return value represents whether the widget could be painted with the
// given back-end.
template <typename PaintBackendData>
bool DoDrawWidgetBackground(PaintBackendData&, nsIFrame*, StyleAppearance,
const nsRect&, DrawOverflow);
[[nodiscard]] LayoutDeviceIntMargin GetWidgetBorder(nsDeviceContext* aContext,
nsIFrame*,
StyleAppearance) override;
bool GetWidgetPadding(nsDeviceContext* aContext, nsIFrame*, StyleAppearance,
LayoutDeviceIntMargin* aResult) override;
bool GetWidgetOverflow(nsDeviceContext* aContext, nsIFrame*, StyleAppearance,
nsRect* aOverflowRect) override;
NS_IMETHOD GetMinimumWidgetSize(nsPresContext* aPresContext, nsIFrame*,
StyleAppearance, LayoutDeviceIntSize* aResult,
bool* aIsOverridable) override;
Transparency GetWidgetTransparency(nsIFrame*, StyleAppearance) override;
NS_IMETHOD WidgetStateChanged(nsIFrame*, StyleAppearance, nsAtom* aAttribute,
bool* aShouldRepaint,
const nsAttrValue* aOldValue) override;
NS_IMETHOD ThemeChanged() override;
bool WidgetAppearanceDependsOnWindowFocus(StyleAppearance) override;
/*bool NeedToClearBackgroundBehindWidget(
nsIFrame*, StyleAppearance) override;*/
ThemeGeometryType ThemeGeometryTypeForWidget(nsIFrame*,
StyleAppearance) override;
bool ThemeSupportsWidget(nsPresContext*, nsIFrame*, StyleAppearance) override;
bool WidgetIsContainer(StyleAppearance) override;
bool ThemeDrawsFocusForWidget(nsIFrame*, StyleAppearance) override;
bool ThemeNeedsComboboxDropmarker() override;
ScrollbarSizes GetScrollbarSizes(nsPresContext*, StyleScrollbarWidth,
Overlay) override;
nscoord GetCheckboxRadioPrefSize() override;
static UniquePtr<ScrollbarDrawing> DefaultPlatformScrollbarStyle();
static UniquePtr<ScrollbarDrawing> ScrollbarStyle();
protected:
virtual ~Theme() = default;
static DPIRatio GetDPIRatio(nsPresContext*, StyleAppearance);
static DPIRatio GetDPIRatio(nsIFrame*, StyleAppearance);
std::pair<sRGBColor, sRGBColor> ComputeCheckboxColors(const EventStates&,
StyleAppearance,
const Colors&);
sRGBColor ComputeCheckmarkColor(const EventStates&, const Colors&);
enum class OutlineCoversBorder : bool { No, Yes };
sRGBColor ComputeBorderColor(const EventStates&, const Colors&,
OutlineCoversBorder);
std::pair<sRGBColor, sRGBColor> ComputeButtonColors(const EventStates&,
const Colors&,
nsIFrame* = nullptr);
std::pair<sRGBColor, sRGBColor> ComputeTextfieldColors(const EventStates&,
const Colors&,
OutlineCoversBorder);
std::pair<sRGBColor, sRGBColor> ComputeRangeProgressColors(const EventStates&,
const Colors&);
std::pair<sRGBColor, sRGBColor> ComputeRangeTrackColors(const EventStates&,
const Colors&);
std::pair<sRGBColor, sRGBColor> ComputeRangeThumbColors(const EventStates&,
const Colors&);
std::pair<sRGBColor, sRGBColor> ComputeProgressColors(const Colors&);
std::pair<sRGBColor, sRGBColor> ComputeProgressTrackColors(const Colors&);
std::pair<sRGBColor, sRGBColor> ComputeMeterchunkColors(
const EventStates& aMeterState, const Colors&);
std::array<sRGBColor, 3> ComputeFocusRectColors(const Colors&);
template <typename PaintBackendData>
void PaintRoundedFocusRect(PaintBackendData&, const LayoutDeviceRect&,
const Colors&, DPIRatio, CSSCoord aRadius,
CSSCoord aOffset);
template <typename PaintBackendData>
void PaintAutoStyleOutline(nsIFrame*, PaintBackendData&,
const LayoutDeviceRect&, const Colors&, DPIRatio);
void PaintCheckboxControl(DrawTarget& aDrawTarget, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
void PaintCheckMark(DrawTarget&, const LayoutDeviceRect&, const EventStates&,
const Colors&);
void PaintIndeterminateMark(DrawTarget&, const LayoutDeviceRect&,
const EventStates&, const Colors&);
template <typename PaintBackendData>
void PaintStrokedCircle(PaintBackendData&, const LayoutDeviceRect&,
const sRGBColor& aBackgroundColor,
const sRGBColor& aBorderColor,
const CSSCoord aBorderWidth, DPIRatio);
void PaintCircleShadow(DrawTarget&, const LayoutDeviceRect& aBoxRect,
const LayoutDeviceRect& aClipRect, float aShadowAlpha,
const CSSPoint& aShadowOffset,
CSSCoord aShadowBlurStdDev, DPIRatio);
void PaintCircleShadow(WebRenderBackendData&,
const LayoutDeviceRect& aBoxRect,
const LayoutDeviceRect& aClipRect, float aShadowAlpha,
const CSSPoint& aShadowOffset,
CSSCoord aShadowBlurStdDev, DPIRatio);
template <typename PaintBackendData>
void PaintRadioControl(PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
template <typename PaintBackendData>
void PaintRadioCheckmark(PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, DPIRatio);
template <typename PaintBackendData>
void PaintTextField(PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
template <typename PaintBackendData>
void PaintListbox(PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
template <typename PaintBackendData>
void PaintMenulist(PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
void PaintMenulistArrowButton(nsIFrame*, DrawTarget&, const LayoutDeviceRect&,
const EventStates&);
void PaintSpinnerButton(nsIFrame*, DrawTarget&, const LayoutDeviceRect&,
const EventStates&, StyleAppearance, const Colors&,
DPIRatio);
template <typename PaintBackendData>
void PaintRange(nsIFrame*, PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio,
bool aHorizontal);
template <typename PaintBackendData>
void PaintProgress(nsIFrame*, PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio,
bool aIsMeter);
template <typename PaintBackendData>
void PaintButton(nsIFrame*, PaintBackendData&, const LayoutDeviceRect&,
const EventStates&, const Colors&, DPIRatio);
static void PrefChangedCallback(const char*, void*) {
LookAndFeel::NotifyChangedAllWindows(ThemeChangeKind::Layout);
}
void SetScrollbarDrawing(UniquePtr<ScrollbarDrawing>&& aScrollbarDrawing) {
mScrollbarDrawing = std::move(aScrollbarDrawing);
}
ScrollbarDrawing& GetScrollbarDrawing() const { return *mScrollbarDrawing; }
UniquePtr<ScrollbarDrawing> mScrollbarDrawing;
bool ThemeSupportsScrollbarButtons() override;
};
} // namespace widget
} // namespace mozilla
#endif
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