widget/ScrollbarDrawingCocoa.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_widget_ScrollbarDrawingCocoa_h
   8 #define mozilla_widget_ScrollbarDrawingCocoa_h
   9
  10 #include "ScrollbarDrawing.h"
  11
  12 #include "mozilla/Array.h"
  13 #include "nsNativeBasicTheme.h"
  14
  15 namespace mozilla::widget {
  16
  17 class ScrollbarDrawingCocoa final : public ScrollbarDrawing {
  18  public:
  19   ScrollbarDrawingCocoa() = default;
  20   virtual ~ScrollbarDrawingCocoa() = default;
  21
  22   struct FillRectType {
  23     gfx::Rect mRect;
  24     nscolor mColor;
  25   };
  26
  27   // The caller can draw this rectangle with rounded corners as appropriate.
  28   struct ThumbRect {
  29     gfx::Rect mRect;
  30     nscolor mFillColor;
  31     nscolor mStrokeColor;
  32     float mStrokeWidth;
  33     float mStrokeOutset;
  34   };
  35
  36   using ScrollbarTrackRects = Array<FillRectType, 4>;
  37   using ScrollCornerRects = Array<FillRectType, 7>;
  38
  39   LayoutDeviceIntSize GetMinimumWidgetSize(nsPresContext*,
  40                                            StyleAppearance aAppearance,
  41                                            nsIFrame* aFrame) override;
  42
  43   static CSSIntCoord GetScrollbarSize(StyleScrollbarWidth aWidth,
  44                                       bool aOverlay);
  45   static LayoutDeviceIntCoord GetScrollbarSize(StyleScrollbarWidth aWidth,
  46                                                bool aOverlay,
  47                                                DPIRatio aDpiRatio);
  48   ScrollbarSizes GetScrollbarSizes(nsPresContext*, StyleScrollbarWidth,
  49                                    Overlay) override;
  50
  51   static ThumbRect GetThumbRect(const gfx::Rect& aRect,
  52                                 const ScrollbarParams& aParams, float aScale);
  53   static bool GetScrollbarTrackRects(const gfx::Rect& aRect,
  54                                      const ScrollbarParams& aParams,
  55                                      float aScale, ScrollbarTrackRects& aRects);
  56   static bool GetScrollCornerRects(const gfx::Rect& aRect,
  57                                    const ScrollbarParams& aParams, float aScale,
  58                                    ScrollCornerRects& aRects);
  59
  60   template <typename PaintBackendData>
  61   void DoPaintScrollbarThumb(PaintBackendData&, const LayoutDeviceRect& aRect,
  62                              bool aHorizontal, nsIFrame* aFrame,
  63                              const ComputedStyle& aStyle,
  64                              const EventStates& aElementState,
  65                              const EventStates& aDocumentState,
  66                              const DPIRatio&);
  67   bool PaintScrollbarThumb(DrawTarget&, const LayoutDeviceRect&,
  68                            bool aHorizontal, nsIFrame*, const ComputedStyle&,
  69                            const EventStates& aElementState,
  70                            const EventStates& aDocumentState, const Colors&,
  71                            const DPIRatio&) override;
  72   bool PaintScrollbarThumb(WebRenderBackendData&, const LayoutDeviceRect&,
  73                            bool aHorizontal, nsIFrame*, const ComputedStyle&,
  74                            const EventStates& aElementState,
  75                            const EventStates& aDocumentState, const Colors&,
  76                            const DPIRatio&) override;
  77
  78   template <typename PaintBackendData>
  79   void DoPaintScrollbarTrack(PaintBackendData&, const LayoutDeviceRect&, bool,
  80                              nsIFrame*, const ComputedStyle&,
  81                              const EventStates&, const DPIRatio&);
  82   bool PaintScrollbarTrack(DrawTarget&, const LayoutDeviceRect& aRect,
  83                            bool aHorizontal, nsIFrame* aFrame,
  84                            const ComputedStyle& aStyle,
  85                            const EventStates& aDocumentState, const Colors&,
  86                            const DPIRatio&) override;
  87   bool PaintScrollbarTrack(WebRenderBackendData&, const LayoutDeviceRect& aRect,
  88                            bool aHorizontal, nsIFrame* aFrame,
  89                            const ComputedStyle& aStyle,
  90                            const EventStates& aDocumentState, const Colors&,
  91                            const DPIRatio&) override;
  92
  93   template <typename PaintBackendData>
  94   void DoPaintScrollCorner(PaintBackendData&, const LayoutDeviceRect&,
  95                            nsIFrame*, const ComputedStyle&, const EventStates&,
  96                            const DPIRatio&);
  97   bool PaintScrollCorner(DrawTarget&, const LayoutDeviceRect& aRect,
  98                          nsIFrame* aFrame, const ComputedStyle& aStyle,
  99                          const EventStates& aDocumentState, const Colors&,
 100                          const DPIRatio&) override;
 101   bool PaintScrollCorner(WebRenderBackendData&, const LayoutDeviceRect& aRect,
 102                          nsIFrame* aFrame, const ComputedStyle& aStyle,
 103                          const EventStates& aDocumentState, const Colors&,
 104                          const DPIRatio&) override;
 105
 106   void RecomputeScrollbarParams() override;
 107
 108   bool ShouldDrawScrollbarButtons() override { return false; }
 109 };
 110
 111 }  // namespace mozilla::widget
 112
 113 #endif