forked from mirrors/gecko-dev
130 lines
5 KiB
C++
130 lines
5 KiB
C++
/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "ScrollbarDrawingGTK.h"
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#include "mozilla/gfx/Helpers.h"
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#include "mozilla/StaticPrefs_widget.h"
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#include "nsLayoutUtils.h"
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#include "nsNativeTheme.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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using namespace mozilla::widget;
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LayoutDeviceIntSize ScrollbarDrawingGTK::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 scrollbarSize = GetScrollbarSize(aPresContext, aFrame);
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LayoutDeviceIntSize size{scrollbarSize, scrollbarSize};
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if (aAppearance == StyleAppearance::ScrollbarHorizontal ||
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aAppearance == StyleAppearance::ScrollbarVertical ||
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aAppearance == StyleAppearance::ScrollbarthumbHorizontal ||
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aAppearance == StyleAppearance::ScrollbarthumbVertical) {
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CSSCoord thumbSize(
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StaticPrefs::widget_non_native_theme_gtk_scrollbar_thumb_cross_size());
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const bool isVertical =
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aAppearance == StyleAppearance::ScrollbarVertical ||
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aAppearance == StyleAppearance::ScrollbarthumbVertical;
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auto dpi = GetDPIRatioForScrollbarPart(aPresContext);
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if (isVertical) {
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size.height = thumbSize * dpi;
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} else {
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size.width = thumbSize * dpi;
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}
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}
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return size;
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}
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Maybe<nsITheme::Transparency> ScrollbarDrawingGTK::GetScrollbarPartTransparency(
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nsIFrame* aFrame, StyleAppearance aAppearance) {
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if (!aFrame->PresContext()->UseOverlayScrollbars() &&
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(aAppearance == StyleAppearance::ScrollbarVertical ||
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aAppearance == StyleAppearance::ScrollbarHorizontal) &&
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IsScrollbarTrackOpaque(aFrame)) {
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return Some(nsITheme::eOpaque);
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}
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return Nothing();
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}
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template <typename PaintBackendData>
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bool ScrollbarDrawingGTK::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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sRGBColor thumbColor = ComputeScrollbarThumbColor(
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aFrame, aStyle, aElementState, aDocumentState, aColors);
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LayoutDeviceRect thumbRect(aRect);
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const bool horizontal = aScrollbarKind == ScrollbarKind::Horizontal;
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if (aFrame->PresContext()->UseOverlayScrollbars() &&
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!ScrollbarDrawing::IsParentScrollbarHoveredOrActive(aFrame)) {
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if (horizontal) {
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thumbRect.height *= 0.5;
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thumbRect.y += thumbRect.height;
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} else {
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thumbRect.width *= 0.5;
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if (aScrollbarKind == ScrollbarKind::VerticalRight) {
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thumbRect.x += thumbRect.width;
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}
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}
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}
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{
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float factor = std::max(
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0.0f,
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1.0f - StaticPrefs::widget_non_native_theme_gtk_scrollbar_thumb_size());
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thumbRect.Deflate((horizontal ? thumbRect.height : thumbRect.width) *
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factor);
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}
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LayoutDeviceCoord radius =
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StaticPrefs::widget_non_native_theme_gtk_scrollbar_round_thumb()
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? (horizontal ? thumbRect.height : thumbRect.width) / 2.0f
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: 0.0f;
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ThemeDrawing::PaintRoundedRectWithRadius(aPaintData, thumbRect, thumbColor,
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sRGBColor(), 0, radius / aDpiRatio,
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aDpiRatio);
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return true;
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}
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bool ScrollbarDrawingGTK::PaintScrollbarThumb(
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DrawTarget& aDrawTarget, 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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return DoPaintScrollbarThumb(aDrawTarget, aRect, aScrollbarKind, aFrame,
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aStyle, aElementState, aDocumentState, aColors,
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aDpiRatio);
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}
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bool ScrollbarDrawingGTK::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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return DoPaintScrollbarThumb(aWrData, aRect, aScrollbarKind, aFrame, aStyle,
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aElementState, aDocumentState, aColors,
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aDpiRatio);
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}
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bool ScrollbarDrawingGTK::ShouldDrawScrollbarButtons() {
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return StaticPrefs::widget_non_native_theme_gtk_scrollbar_allow_buttons();
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}
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void ScrollbarDrawingGTK::RecomputeScrollbarParams() {
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uint32_t defaultSize = 12;
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uint32_t overrideSize =
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StaticPrefs::widget_non_native_theme_scrollbar_size_override();
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if (overrideSize > 0) {
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defaultSize = overrideSize;
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}
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ConfigureScrollbarSize(defaultSize);
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}
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