Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 172 insertions, 0 deletions

diff --git a/widget/ScrollbarDrawing.h b/widget/ScrollbarDrawing.h
new file mode 100644
index 0000000000..656822aeed
--- /dev/null
+++ b/widget/ScrollbarDrawing.h
@@ -0,0 +1,172 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_ScrollbarDrawing_h
+#define mozilla_widget_ScrollbarDrawing_h
+
+#include "mozilla/dom/RustTypes.h"
+#include "mozilla/gfx/2D.h"
+#include "nsColor.h"
+#include "nsITheme.h"
+#include "ThemeColors.h"
+#include "ThemeDrawing.h"
+#include "Units.h"
+
+namespace mozilla::widget {
+
+class ScrollbarDrawing {
+ protected:
+  using DPIRatio = mozilla::CSSToLayoutDeviceScale;
+  using ElementState = dom::ElementState;
+  using DocumentState = dom::DocumentState;
+  using DrawTarget = mozilla::gfx::DrawTarget;
+  using sRGBColor = mozilla::gfx::sRGBColor;
+  using Colors = ThemeColors;
+  using Overlay = nsITheme::Overlay;
+  using WebRenderBackendData = mozilla::widget::WebRenderBackendData;
+
+  enum class Kind : uint8_t {
+    Android,
+    Cocoa,
+    Gtk,
+    Win10,
+    Win11,
+  };
+
+  explicit ScrollbarDrawing(Kind aKind) : mKind(aKind) {}
+
+ public:
+  virtual ~ScrollbarDrawing() = default;
+
+  enum class ScrollbarKind : uint8_t {
+    Horizontal,
+    VerticalLeft,
+    VerticalRight,
+  };
+
+  DPIRatio GetDPIRatioForScrollbarPart(const nsPresContext*);
+
+  static nsIFrame* GetParentScrollbarFrame(nsIFrame* aFrame);
+  static bool IsParentScrollbarRolledOver(nsIFrame* aFrame);
+  static bool IsParentScrollbarHoveredOrActive(nsIFrame* aFrame);
+
+  static bool IsScrollbarWidthThin(const ComputedStyle& aStyle);
+  static bool IsScrollbarWidthThin(nsIFrame* aFrame);
+
+  CSSIntCoord GetCSSScrollbarSize(StyleScrollbarWidth, Overlay) const;
+  LayoutDeviceIntCoord GetScrollbarSize(const nsPresContext*,
+                                        StyleScrollbarWidth, Overlay);
+  LayoutDeviceIntCoord GetScrollbarSize(const nsPresContext*, nsIFrame*);
+
+  virtual LayoutDeviceIntSize GetMinimumWidgetSize(nsPresContext*,
+                                                   StyleAppearance aAppearance,
+                                                   nsIFrame* aFrame) = 0;
+  virtual Maybe<nsITheme::Transparency> GetScrollbarPartTransparency(
+      nsIFrame* aFrame, StyleAppearance aAppearance) {
+    return Nothing();
+  }
+
+  bool IsScrollbarTrackOpaque(nsIFrame*);
+  virtual sRGBColor ComputeScrollbarTrackColor(nsIFrame*, const ComputedStyle&,
+                                               const DocumentState&,
+                                               const Colors&);
+  virtual sRGBColor ComputeScrollbarThumbColor(nsIFrame*, const ComputedStyle&,
+                                               const ElementState&,
+                                               const DocumentState&,
+                                               const Colors&);
+
+  nscolor GetScrollbarButtonColor(nscolor aTrackColor, ElementState);
+  Maybe<nscolor> GetScrollbarArrowColor(nscolor aButtonColor);
+
+  // Returned colors are button, arrow.
+  virtual std::pair<sRGBColor, sRGBColor> ComputeScrollbarButtonColors(
+      nsIFrame*, StyleAppearance, const ComputedStyle&, const ElementState&,
+      const DocumentState&, const Colors&);
+
+  virtual bool PaintScrollbarButton(DrawTarget&, StyleAppearance,
+                                    const LayoutDeviceRect&, ScrollbarKind,
+                                    nsIFrame*, const ComputedStyle&,
+                                    const ElementState&, const DocumentState&,
+                                    const Colors&, const DPIRatio&);
+
+  virtual bool PaintScrollbarThumb(DrawTarget&, const LayoutDeviceRect&,
+                                   ScrollbarKind, nsIFrame*,
+                                   const ComputedStyle&, const ElementState&,
+                                   const DocumentState&, const Colors&,
+                                   const DPIRatio&) = 0;
+  virtual bool PaintScrollbarThumb(WebRenderBackendData&,
+                                   const LayoutDeviceRect&, ScrollbarKind,
+                                   nsIFrame*, const ComputedStyle&,
+                                   const ElementState&, const DocumentState&,
+                                   const Colors&, const DPIRatio&) = 0;
+
+  template <typename PaintBackendData>
+  bool DoPaintDefaultScrollbar(PaintBackendData&, const LayoutDeviceRect&,
+                               ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                               const ElementState&, const DocumentState&,
+                               const Colors&, const DPIRatio&);
+  bool PaintScrollbar(DrawTarget&, const LayoutDeviceRect&, ScrollbarKind,
+                      nsIFrame*, const ComputedStyle&, const ElementState&,
+                      const DocumentState&, const Colors&, const DPIRatio&);
+  bool PaintScrollbar(WebRenderBackendData&, const LayoutDeviceRect&,
+                      ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                      const ElementState&, const DocumentState&, const Colors&,
+                      const DPIRatio&);
+
+  virtual bool PaintScrollbarTrack(DrawTarget&, const LayoutDeviceRect&,
+                                   ScrollbarKind, nsIFrame*,
+                                   const ComputedStyle&, const DocumentState&,
+                                   const Colors&, const DPIRatio&) {
+    // Draw nothing by default. Subclasses can override this.
+    return true;
+  }
+  virtual bool PaintScrollbarTrack(WebRenderBackendData&,
+                                   const LayoutDeviceRect&, ScrollbarKind,
+                                   nsIFrame*, const ComputedStyle&,
+                                   const DocumentState&, const Colors&,
+                                   const DPIRatio&) {
+    // Draw nothing by default. Subclasses can override this.
+    return true;
+  }
+
+  template <typename PaintBackendData>
+  bool DoPaintDefaultScrollCorner(PaintBackendData&, const LayoutDeviceRect&,
+                                  ScrollbarKind, nsIFrame*,
+                                  const ComputedStyle&, const DocumentState&,
+                                  const Colors&, const DPIRatio&);
+  virtual bool PaintScrollCorner(DrawTarget&, const LayoutDeviceRect&,
+                                 ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                                 const DocumentState&, const Colors&,
+                                 const DPIRatio&);
+  virtual bool PaintScrollCorner(WebRenderBackendData&, const LayoutDeviceRect&,
+                                 ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                                 const DocumentState&, const Colors&,
+                                 const DPIRatio&);
+
+  virtual void RecomputeScrollbarParams() = 0;
+
+  virtual bool ShouldDrawScrollbarButtons() { return true; }
+
+ private:
+  // The scrollbar sizes for all our scrollbars. Indices are overlay or not,
+  // then thin or not. Should be configured via ConfigureScrollbarSize.
+  CSSIntCoord mScrollbarSize[2][2]{};
+
+ protected:
+  // For some kind of style differences a full virtual method is overkill, so we
+  // store the kind here so we can branch on it if necessary.
+  Kind mKind;
+
+  // Configures the scrollbar sizes based on a single size.
+  void ConfigureScrollbarSize(CSSIntCoord);
+
+  // Configures a particular scrollbar size.
+  void ConfigureScrollbarSize(StyleScrollbarWidth, Overlay, CSSIntCoord);
+};
+
+}  // namespace mozilla::widget
+
+#endif