From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 widget/ScrollbarDrawingAndroid.cpp | 84 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 widget/ScrollbarDrawingAndroid.cpp

(limited to 'widget/ScrollbarDrawingAndroid.cpp')

diff --git a/widget/ScrollbarDrawingAndroid.cpp b/widget/ScrollbarDrawingAndroid.cpp
new file mode 100644
index 0000000000..29ad917a91
--- /dev/null
+++ b/widget/ScrollbarDrawingAndroid.cpp
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 40; 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/. */
+
+#include "ScrollbarDrawingAndroid.h"
+
+#include "nsIFrame.h"
+#include "nsNativeTheme.h"
+#include "mozilla/StaticPrefs_widget.h"
+
+using namespace mozilla;
+using namespace mozilla::widget;
+
+LayoutDeviceIntSize ScrollbarDrawingAndroid::GetMinimumWidgetSize(
+    nsPresContext* aPresContext, StyleAppearance aAppearance,
+    nsIFrame* aFrame) {
+  MOZ_ASSERT(nsNativeTheme::IsWidgetScrollbarPart(aAppearance));
+  auto size =
+      GetScrollbarSize(aPresContext, StyleScrollbarWidth::Auto, Overlay::Yes);
+  return LayoutDeviceIntSize{size, size};
+}
+
+template <typename PaintBackendData>
+void ScrollbarDrawingAndroid::DoPaintScrollbarThumb(
+    PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
+    ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
+    const ElementState& aElementState, const DocumentState& aDocumentState,
+    const Colors& aColors, const DPIRatio& aDpiRatio) {
+  // TODO(emilio): Maybe do like macOS and draw a stroke?
+  const auto color = ComputeScrollbarThumbColor(aFrame, aStyle, aElementState,
+                                                aDocumentState, aColors);
+  const bool horizontal = aScrollbarKind == ScrollbarKind::Horizontal;
+
+  // Draw the thumb rect centered in the scrollbar.
+  LayoutDeviceRect thumbRect(aRect);
+  if (horizontal) {
+    thumbRect.height *= 0.5f;
+    thumbRect.y += thumbRect.height * 0.5f;
+  } else {
+    thumbRect.width *= 0.5f;
+    thumbRect.x += thumbRect.width * 0.5f;
+  }
+
+  const LayoutDeviceCoord radius =
+      (horizontal ? thumbRect.height : thumbRect.width) / 2.0f;
+  ThemeDrawing::PaintRoundedRectWithRadius(aPaintData, thumbRect, color,
+                                           sRGBColor::White(0.0f), 0.0f,
+                                           radius / aDpiRatio, aDpiRatio);
+}
+
+bool ScrollbarDrawingAndroid::PaintScrollbarThumb(
+    DrawTarget& aDt, const LayoutDeviceRect& aRect,
+    ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
+    const ElementState& aElementState, const DocumentState& aDocumentState,
+    const Colors& aColors, const DPIRatio& aDpiRatio) {
+  DoPaintScrollbarThumb(aDt, aRect, aScrollbarKind, aFrame, aStyle,
+                        aElementState, aDocumentState, aColors, aDpiRatio);
+  return true;
+}
+
+bool ScrollbarDrawingAndroid::PaintScrollbarThumb(
+    WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
+    ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
+    const ElementState& aElementState, const DocumentState& aDocumentState,
+    const Colors& aColors, const DPIRatio& aDpiRatio) {
+  DoPaintScrollbarThumb(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
+                        aElementState, aDocumentState, aColors, aDpiRatio);
+  return true;
+}
+
+void ScrollbarDrawingAndroid::RecomputeScrollbarParams() {
+  uint32_t defaultSize = 6;
+  uint32_t overrideSize =
+      StaticPrefs::widget_non_native_theme_scrollbar_size_override();
+  if (overrideSize > 0) {
+    defaultSize = overrideSize;
+  }
+  ConfigureScrollbarSize(defaultSize);
+  // We make thin scrollbars as wide as auto ones because auto scrollbars on
+  // android are already thin enough.
+  ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::Yes, defaultSize);
+  ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::No, defaultSize);
+}
-- 
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