forked from mirrors/gecko-dev
87ca092596
This patch shouldn't change behavior. The Cocoa changes in particular just save useless frame tree walks, since ThemeColors already computes the color scheme in ColorSchemeForWidget. Differential Revision: https://phabricator.services.mozilla.com/D153424
518 lines
19 KiB
C++
518 lines
19 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 = [&] {
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switch (aAppearance) {
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case StyleAppearance::ScrollbarthumbHorizontal:
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return IntSize{26, 0};
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case StyleAppearance::ScrollbarthumbVertical:
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return IntSize{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 = GetScrollbarSize(
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scrollbarWidth,
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LookAndFeel::GetInt(LookAndFeel::IntID::UseOverlayScrollbars));
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return IntSize{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 IntSize{15, 16};
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case StyleAppearance::ScrollbarbuttonLeft:
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case StyleAppearance::ScrollbarbuttonRight:
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return IntSize{16, 15};
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default:
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return IntSize{};
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}
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}();
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auto dpi = GetDPIRatioForScrollbarPart(aPresContext).scale;
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if (dpi >= 2.0f) {
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return LayoutDeviceIntSize{minSize.width * 2, minSize.height * 2};
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}
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return LayoutDeviceIntSize{minSize.width, minSize.height};
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}
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/*static*/
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CSSIntCoord ScrollbarDrawingCocoa::GetScrollbarSize(StyleScrollbarWidth aWidth,
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bool aOverlay) {
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bool isSmall = aWidth == StyleScrollbarWidth::Thin;
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if (aOverlay) {
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return isSmall ? 14 : 16;
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}
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return isSmall ? 11 : 15;
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}
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/*static*/
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LayoutDeviceIntCoord ScrollbarDrawingCocoa::GetScrollbarSize(
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StyleScrollbarWidth aWidth, bool aOverlay, DPIRatio aDpiRatio) {
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CSSIntCoord size = GetScrollbarSize(aWidth, aOverlay);
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if (aDpiRatio.scale >= 2.0f) {
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return int32_t(size) * 2;
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}
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return int32_t(size);
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}
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auto ScrollbarDrawingCocoa::GetScrollbarSizes(nsPresContext* aPresContext,
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StyleScrollbarWidth aWidth,
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Overlay aOverlay)
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-> ScrollbarSizes {
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auto size = GetScrollbarSize(aWidth, aOverlay == Overlay::Yes,
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GetDPIRatioForScrollbarPart(aPresContext));
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return {size, size};
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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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// This matches the sizing checks in GetMinimumWidgetSize etc.
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aScale = aScale >= 2.0f ? 2.0f : 1.0f;
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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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// This matches the sizing checks in GetMinimumWidgetSize etc.
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aScale = aScale >= 2.0f ? 2.0f : 1.0f;
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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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// This matches the sizing checks in GetMinimumWidgetSize etc.
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aScale = aScale >= 2.0f ? 2.0f : 1.0f;
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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,
|
|
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,
|
|
ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
|
|
const DocumentState& aDocumentState, const Colors& aColors,
|
|
const DPIRatio& aDpiRatio) {
|
|
DoPaintScrollbarTrack(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
|
|
aDocumentState, aColors, aDpiRatio);
|
|
return true;
|
|
}
|
|
|
|
template <typename PaintBackendData>
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|
void ScrollbarDrawingCocoa::DoPaintScrollCorner(
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|
PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
|
|
ScrollbarKind aScrollbarKind, nsIFrame* aFrame, const ComputedStyle& aStyle,
|
|
const DocumentState& aDocumentState, const Colors& aColors,
|
|
const DPIRatio& aDpiRatio) {
|
|
ScrollbarParams params =
|
|
ComputeScrollbarParams(aFrame, aStyle, aColors, aScrollbarKind);
|
|
ScrollCornerRects rects;
|
|
if (GetScrollCornerRects(aRect, params, aDpiRatio.scale, rects)) {
|
|
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() {
|
|
uint32_t defaultSize = 17;
|
|
uint32_t overrideSize =
|
|
StaticPrefs::widget_non_native_theme_scrollbar_size_override();
|
|
if (overrideSize > 0) {
|
|
defaultSize = overrideSize;
|
|
}
|
|
mHorizontalScrollbarHeight = mVerticalScrollbarWidth = defaultSize;
|
|
}
|
|
|
|
} // namespace mozilla::widget
|