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604d8268b2
This removes the capability of having differently-sized vertical and horizontal scrollbars (which is only potentially used in windows, and in practice almost-never used). For that case, we choose the larger of vertical/horizontal scrollbar sizes. This is in order to be able to realistically expose the scrollbar size to CSS, see blocked bug. We make RecomputeScrollbarParams the central place where each scrollbar style decides its sizes, and make GetDPIRatioForScrollbarPart handle the cocoa special-case of scaling to 1 or 2, but nothing else. Differential Revision: https://phabricator.services.mozilla.com/D168080
477 lines
18 KiB
C++
477 lines
18 KiB
C++
/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 2; -*- */
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/* vim: set sw=2 ts=8 et tw=80 : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScrollbarDrawingCocoa.h"
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#include "mozilla/gfx/Helpers.h"
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#include "mozilla/RelativeLuminanceUtils.h"
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#include "mozilla/StaticPrefs_widget.h"
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#include "nsContainerFrame.h"
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#include "nsAlgorithm.h"
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#include "nsIFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsLookAndFeel.h"
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#include "nsNativeTheme.h"
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using namespace mozilla::gfx;
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namespace mozilla::widget {
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using ScrollbarKind = ScrollbarDrawing::ScrollbarKind;
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struct ColoredRect {
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LayoutDeviceRect mRect;
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nscolor mColor = 0;
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};
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// The caller can draw this rectangle with rounded corners as appropriate.
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struct ThumbRect {
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LayoutDeviceRect mRect;
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nscolor mFillColor = 0;
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nscolor mStrokeColor = 0;
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float mStrokeWidth = 0.0f;
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float mStrokeOutset = 0.0f;
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};
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using ScrollbarTrackRects = Array<ColoredRect, 4>;
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using ScrollCornerRects = Array<ColoredRect, 7>;
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struct ScrollbarParams {
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bool isOverlay = false;
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bool isRolledOver = false;
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bool isSmall = false;
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bool isHorizontal = false;
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bool isRtl = false;
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bool isDark = false;
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bool isCustom = false;
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// Two colors only used when custom is true.
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nscolor trackColor = NS_RGBA(0, 0, 0, 0);
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nscolor faceColor = NS_RGBA(0, 0, 0, 0);
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};
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static ScrollbarParams ComputeScrollbarParams(nsIFrame* aFrame,
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const ComputedStyle& aStyle,
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const ThemeColors& aColors,
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ScrollbarKind aScrollbarKind) {
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ScrollbarParams params;
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params.isOverlay =
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nsLookAndFeel::GetInt(LookAndFeel::IntID::UseOverlayScrollbars) != 0;
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params.isRolledOver = ScrollbarDrawing::IsParentScrollbarRolledOver(aFrame);
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params.isSmall =
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aStyle.StyleUIReset()->ScrollbarWidth() == StyleScrollbarWidth::Thin;
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params.isRtl = aScrollbarKind == ScrollbarKind::VerticalLeft;
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params.isHorizontal = aScrollbarKind == ScrollbarKind::Horizontal;
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params.isDark = aColors.IsDark();
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const nsStyleUI* ui = aStyle.StyleUI();
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if (ui->HasCustomScrollbars()) {
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const auto& colors = ui->mScrollbarColor.AsColors();
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params.isCustom = true;
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params.trackColor = colors.track.CalcColor(aStyle);
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params.faceColor = colors.thumb.CalcColor(aStyle);
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}
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return params;
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}
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LayoutDeviceIntSize ScrollbarDrawingCocoa::GetMinimumWidgetSize(
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nsPresContext* aPresContext, StyleAppearance aAppearance,
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nsIFrame* aFrame) {
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MOZ_ASSERT(nsNativeTheme::IsWidgetScrollbarPart(aAppearance));
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auto minSize = [&]() -> CSSIntSize {
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switch (aAppearance) {
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case StyleAppearance::ScrollbarthumbHorizontal:
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return {26, 0};
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case StyleAppearance::ScrollbarthumbVertical:
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return {0, 26};
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case StyleAppearance::ScrollbarVertical:
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case StyleAppearance::ScrollbarHorizontal:
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case StyleAppearance::ScrollbartrackVertical:
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case StyleAppearance::ScrollbartrackHorizontal: {
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ComputedStyle* style = nsLayoutUtils::StyleForScrollbar(aFrame);
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auto scrollbarWidth = style->StyleUIReset()->ScrollbarWidth();
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auto size = GetCSSScrollbarSize(
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scrollbarWidth, Overlay(aPresContext->UseOverlayScrollbars()));
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return {size, size};
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}
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case StyleAppearance::ScrollbarbuttonUp:
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case StyleAppearance::ScrollbarbuttonDown:
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return {15, 16};
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case StyleAppearance::ScrollbarbuttonLeft:
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case StyleAppearance::ScrollbarbuttonRight:
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return {16, 15};
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default:
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return {};
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}
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}();
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auto dpi = GetDPIRatioForScrollbarPart(aPresContext);
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return LayoutDeviceIntSize::Round(CSSSize(minSize) * dpi);
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}
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static ThumbRect GetThumbRect(const LayoutDeviceRect& aRect,
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const ScrollbarParams& aParams, float aScale) {
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// Compute the thumb thickness. This varies based on aParams.small,
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// aParams.overlay and aParams.rolledOver. non-overlay: 6 / 8, overlay
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// non-hovered: 5 / 7, overlay hovered: 9 / 11
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float thickness = aParams.isSmall ? 6.0f : 8.0f;
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if (aParams.isOverlay) {
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thickness -= 1.0f;
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if (aParams.isRolledOver) {
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thickness += 4.0f;
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}
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}
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thickness *= aScale;
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// Compute the thumb rect.
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const float outerSpacing =
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((aParams.isOverlay || aParams.isSmall) ? 1.0f : 2.0f) * aScale;
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LayoutDeviceRect thumbRect = aRect;
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thumbRect.Deflate(1.0f * aScale);
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if (aParams.isHorizontal) {
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float bottomEdge = thumbRect.YMost() - outerSpacing;
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thumbRect.SetBoxY(bottomEdge - thickness, bottomEdge);
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} else {
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if (aParams.isRtl) {
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float leftEdge = thumbRect.X() + outerSpacing;
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thumbRect.SetBoxX(leftEdge, leftEdge + thickness);
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} else {
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float rightEdge = thumbRect.XMost() - outerSpacing;
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thumbRect.SetBoxX(rightEdge - thickness, rightEdge);
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}
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}
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// Compute the thumb fill color.
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nscolor faceColor;
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if (aParams.isCustom) {
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faceColor = aParams.faceColor;
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} else {
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if (aParams.isOverlay) {
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faceColor =
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aParams.isDark ? NS_RGBA(255, 255, 255, 128) : NS_RGBA(0, 0, 0, 128);
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} else if (aParams.isDark) {
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faceColor = aParams.isRolledOver ? NS_RGBA(158, 158, 158, 255)
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: NS_RGBA(117, 117, 117, 255);
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} else {
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faceColor = aParams.isRolledOver ? NS_RGBA(125, 125, 125, 255)
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: NS_RGBA(194, 194, 194, 255);
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}
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}
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nscolor strokeColor = 0;
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float strokeOutset = 0.0f;
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float strokeWidth = 0.0f;
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// Overlay scrollbars have an additional stroke around the fill.
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if (aParams.isOverlay) {
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// For the default alpha of 128 we want to end up with 48 in the outline.
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constexpr float kAlphaScaling = 48.0f / 128.0f;
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const uint8_t strokeAlpha =
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uint8_t(clamped(NS_GET_A(faceColor) * kAlphaScaling, 0.0f, 48.0f));
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if (strokeAlpha) {
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strokeOutset = (aParams.isDark ? 0.3f : 0.5f) * aScale;
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strokeWidth = (aParams.isDark ? 0.6f : 0.8f) * aScale;
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strokeColor = aParams.isDark ? NS_RGBA(0, 0, 0, strokeAlpha)
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: NS_RGBA(255, 255, 255, strokeAlpha);
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}
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}
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return {thumbRect, faceColor, strokeColor, strokeWidth, strokeOutset};
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}
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struct ScrollbarTrackDecorationColors {
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nscolor mInnerColor = 0;
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nscolor mShadowColor = 0;
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nscolor mOuterColor = 0;
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};
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static ScrollbarTrackDecorationColors ComputeScrollbarTrackDecorationColors(
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nscolor aTrackColor) {
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ScrollbarTrackDecorationColors result;
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float luminance = RelativeLuminanceUtils::Compute(aTrackColor);
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if (luminance >= 0.5f) {
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result.mInnerColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 0.836f);
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result.mShadowColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 0.982f);
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result.mOuterColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 0.886f);
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} else {
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result.mInnerColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 1.196f);
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result.mShadowColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 1.018f);
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result.mOuterColor =
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RelativeLuminanceUtils::Adjust(aTrackColor, luminance * 1.129f);
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}
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return result;
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}
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static bool GetScrollbarTrackRects(const LayoutDeviceRect& aRect,
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const ScrollbarParams& aParams, float aScale,
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ScrollbarTrackRects& aRects) {
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if (aParams.isOverlay && !aParams.isRolledOver) {
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// Non-hovered overlay scrollbars don't have a track. Draw nothing.
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return false;
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}
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nscolor trackColor;
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if (aParams.isCustom) {
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trackColor = aParams.trackColor;
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} else {
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if (aParams.isOverlay) {
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trackColor = aParams.isDark ? NS_RGBA(201, 201, 201, 38)
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: NS_RGBA(250, 250, 250, 191);
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} else {
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trackColor = aParams.isDark ? NS_RGBA(46, 46, 46, 255)
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: NS_RGBA(250, 250, 250, 255);
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}
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}
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float thickness = aParams.isHorizontal ? aRect.height : aRect.width;
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// The scrollbar track is drawn as multiple non-overlapping segments, which
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// make up lines of different widths and with slightly different shading.
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ScrollbarTrackDecorationColors colors =
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ComputeScrollbarTrackDecorationColors(trackColor);
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struct {
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nscolor color;
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float thickness;
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} segments[] = {
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{colors.mInnerColor, 1.0f * aScale},
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{colors.mShadowColor, 1.0f * aScale},
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{trackColor, thickness - 3.0f * aScale},
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{colors.mOuterColor, 1.0f * aScale},
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};
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// Iterate over the segments "from inside to outside" and fill each segment.
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// For horizontal scrollbars, iterate top to bottom.
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// For vertical scrollbars, iterate left to right or right to left based on
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// aParams.isRtl.
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auto current = aRects.begin();
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float accumulatedThickness = 0.0f;
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for (const auto& segment : segments) {
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LayoutDeviceRect segmentRect = aRect;
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float startThickness = accumulatedThickness;
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float endThickness = startThickness + segment.thickness;
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if (aParams.isHorizontal) {
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segmentRect.SetBoxY(aRect.Y() + startThickness, aRect.Y() + endThickness);
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} else {
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if (aParams.isRtl) {
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segmentRect.SetBoxX(aRect.XMost() - endThickness,
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aRect.XMost() - startThickness);
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} else {
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segmentRect.SetBoxX(aRect.X() + startThickness,
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aRect.X() + endThickness);
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}
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}
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accumulatedThickness = endThickness;
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*current++ = {segmentRect, segment.color};
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}
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return true;
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}
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static bool GetScrollCornerRects(const LayoutDeviceRect& aRect,
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const ScrollbarParams& aParams, float aScale,
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ScrollCornerRects& aRects) {
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if (aParams.isOverlay && !aParams.isRolledOver) {
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// Non-hovered overlay scrollbars don't have a corner. Draw nothing.
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return false;
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}
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// Draw the following scroll corner.
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//
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// Output: Rectangles:
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// +---+---+----------+---+ +---+---+----------+---+
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// | I | S | T ... T | O | | I | S | T ... T | O |
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// +---+ | | | +---+---+ | |
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// | S S | T ... T | | | S S | T ... T | . |
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// +-------+ | . | +-------+----------+ . |
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// | T ... T | . | | T ... T | . |
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// | . . | . | | . . | |
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// | T ... T | | | T ... T | O |
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// +------------------+ | +------------------+---+
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// | O ... O | | O ... O |
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// +----------------------+ +----------------------+
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float width = aRect.width;
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float height = aRect.height;
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nscolor trackColor;
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if (aParams.isCustom) {
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trackColor = aParams.trackColor;
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} else {
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trackColor =
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aParams.isDark ? NS_RGBA(46, 46, 46, 255) : NS_RGBA(250, 250, 250, 255);
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}
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ScrollbarTrackDecorationColors colors =
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ComputeScrollbarTrackDecorationColors(trackColor);
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struct {
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nscolor color;
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LayoutDeviceRect relativeRect;
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} pieces[] = {
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{colors.mInnerColor, {0.0f, 0.0f, 1.0f * aScale, 1.0f * aScale}},
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{colors.mShadowColor,
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{1.0f * aScale, 0.0f, 1.0f * aScale, 1.0f * aScale}},
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{colors.mShadowColor,
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{0.0f, 1.0f * aScale, 2.0f * aScale, 1.0f * aScale}},
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{trackColor, {2.0f * aScale, 0.0f, width - 3.0f * aScale, 2.0f * aScale}},
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{trackColor,
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{0.0f, 2.0f * aScale, width - 1.0f * aScale, height - 3.0f * aScale}},
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{colors.mOuterColor,
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{width - 1.0f * aScale, 0.0f, 1.0f * aScale, height - 1.0f * aScale}},
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{colors.mOuterColor,
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{0.0f, height - 1.0f * aScale, width, 1.0f * aScale}},
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};
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auto current = aRects.begin();
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for (const auto& piece : pieces) {
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LayoutDeviceRect pieceRect = piece.relativeRect + aRect.TopLeft();
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if (aParams.isRtl) {
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pieceRect.x = aRect.XMost() - piece.relativeRect.XMost();
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}
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*current++ = {pieceRect, piece.color};
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}
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return true;
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}
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template <typename PaintBackendData>
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void ScrollbarDrawingCocoa::DoPaintScrollbarThumb(
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PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const ElementState& aElementState, const DocumentState& aDocumentState,
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const Colors& aColors, const DPIRatio& aDpiRatio) {
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ScrollbarParams params =
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ComputeScrollbarParams(aFrame, aStyle, aColors, aScrollbarKind);
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auto thumb = GetThumbRect(aRect, params, aDpiRatio.scale);
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LayoutDeviceCoord radius =
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(params.isHorizontal ? thumb.mRect.Height() : thumb.mRect.Width()) / 2.0f;
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ThemeDrawing::PaintRoundedRectWithRadius(
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aPaintData, thumb.mRect, thumb.mRect,
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sRGBColor::FromABGR(thumb.mFillColor), sRGBColor::White(0.0f), 0.0f,
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radius / aDpiRatio, aDpiRatio);
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if (!thumb.mStrokeColor) {
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return;
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}
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// Paint the stroke if needed.
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auto strokeRect = thumb.mRect;
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strokeRect.Inflate(thumb.mStrokeOutset + thumb.mStrokeWidth);
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radius =
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(params.isHorizontal ? strokeRect.Height() : strokeRect.Width()) / 2.0f;
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ThemeDrawing::PaintRoundedRectWithRadius(
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aPaintData, strokeRect, sRGBColor::White(0.0f),
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sRGBColor::FromABGR(thumb.mStrokeColor), thumb.mStrokeWidth,
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radius / aDpiRatio, aDpiRatio);
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}
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bool ScrollbarDrawingCocoa::PaintScrollbarThumb(
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DrawTarget& aDt, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const ElementState& aElementState, const DocumentState& aDocumentState,
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const Colors& aColors, const DPIRatio& aDpiRatio) {
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DoPaintScrollbarThumb(aDt, aRect, aScrollbarKind, aFrame, aStyle,
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aElementState, aDocumentState, aColors, aDpiRatio);
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return true;
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}
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bool ScrollbarDrawingCocoa::PaintScrollbarThumb(
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WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const ElementState& aElementState, const DocumentState& aDocumentState,
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const Colors& aColors, const DPIRatio& aDpiRatio) {
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DoPaintScrollbarThumb(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
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aElementState, aDocumentState, aColors, aDpiRatio);
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return true;
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}
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template <typename PaintBackendData>
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void ScrollbarDrawingCocoa::DoPaintScrollbarTrack(
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PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const DocumentState& aDocumentState, const Colors& aColors,
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const DPIRatio& aDpiRatio) {
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ScrollbarParams params =
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ComputeScrollbarParams(aFrame, aStyle, aColors, aScrollbarKind);
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ScrollbarTrackRects rects;
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if (GetScrollbarTrackRects(aRect, params, aDpiRatio.scale, rects)) {
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for (const auto& rect : rects) {
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ThemeDrawing::FillRect(aPaintData, rect.mRect,
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sRGBColor::FromABGR(rect.mColor));
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}
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}
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}
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bool ScrollbarDrawingCocoa::PaintScrollbarTrack(
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DrawTarget& aDt, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const DocumentState& aDocumentState, const Colors& aColors,
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const DPIRatio& aDpiRatio) {
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DoPaintScrollbarTrack(aDt, aRect, aScrollbarKind, aFrame, aStyle,
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aDocumentState, aColors, aDpiRatio);
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return true;
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}
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bool ScrollbarDrawingCocoa::PaintScrollbarTrack(
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WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const DocumentState& aDocumentState, const Colors& aColors,
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const DPIRatio& aDpiRatio) {
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DoPaintScrollbarTrack(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
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aDocumentState, aColors, aDpiRatio);
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return true;
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}
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template <typename PaintBackendData>
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void ScrollbarDrawingCocoa::DoPaintScrollCorner(
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PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
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ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const DocumentState& aDocumentState, const Colors& aColors,
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const DPIRatio& aDpiRatio) {
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ScrollbarParams params =
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ComputeScrollbarParams(aFrame, aStyle, aColors, aScrollbarKind);
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ScrollCornerRects rects;
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if (GetScrollCornerRects(aRect, params, aDpiRatio.scale, rects)) {
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for (const auto& rect : rects) {
|
|
ThemeDrawing::FillRect(aPaintData, rect.mRect,
|
|
sRGBColor::FromABGR(rect.mColor));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ScrollbarDrawingCocoa::PaintScrollCorner(
|
|
DrawTarget& aDt, const LayoutDeviceRect& aRect,
|
|
ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
|
|
const DocumentState& aDocumentState, const Colors& aColors,
|
|
const DPIRatio& aDpiRatio) {
|
|
DoPaintScrollCorner(aDt, aRect, aScrollbarKind, aFrame, aStyle,
|
|
aDocumentState, aColors, aDpiRatio);
|
|
return true;
|
|
}
|
|
|
|
bool ScrollbarDrawingCocoa::PaintScrollCorner(
|
|
WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
|
|
ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
|
|
const DocumentState& aDocumentState, const Colors& aColors,
|
|
const DPIRatio& aDpiRatio) {
|
|
DoPaintScrollCorner(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
|
|
aDocumentState, aColors, aDpiRatio);
|
|
return true;
|
|
}
|
|
|
|
void ScrollbarDrawingCocoa::RecomputeScrollbarParams() {
|
|
// FIXME(emilio): This doesn't respect the
|
|
// StaticPrefs::widget_non_native_theme_scrollbar_size_override() pref;
|
|
ConfigureScrollbarSize(15); // Just in case, for future-proofing
|
|
ConfigureScrollbarSize(StyleScrollbarWidth::Auto, Overlay::No, 15);
|
|
ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::No, 11);
|
|
ConfigureScrollbarSize(StyleScrollbarWidth::Auto, Overlay::Yes, 16);
|
|
ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::Yes, 14);
|
|
}
|
|
|
|
} // namespace mozilla::widget
|