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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
85 lines
3.5 KiB
C++
85 lines
3.5 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 "ScrollbarDrawingAndroid.h"
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#include "nsIFrame.h"
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#include "nsNativeTheme.h"
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#include "mozilla/StaticPrefs_widget.h"
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using namespace mozilla;
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using namespace mozilla::widget;
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LayoutDeviceIntSize ScrollbarDrawingAndroid::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 size =
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GetScrollbarSize(aPresContext, StyleScrollbarWidth::Auto, Overlay::Yes);
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return LayoutDeviceIntSize{size, size};
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}
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template <typename PaintBackendData>
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void ScrollbarDrawingAndroid::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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// TODO(emilio): Maybe do like macOS and draw a stroke?
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const auto color = ComputeScrollbarThumbColor(aFrame, aStyle, aElementState,
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aDocumentState, aColors);
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const bool horizontal = aScrollbarKind == ScrollbarKind::Horizontal;
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// Draw the thumb rect centered in the scrollbar.
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LayoutDeviceRect thumbRect(aRect);
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if (horizontal) {
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thumbRect.height *= 0.5f;
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thumbRect.y += thumbRect.height * 0.5f;
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} else {
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thumbRect.width *= 0.5f;
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thumbRect.x += thumbRect.width * 0.5f;
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}
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const LayoutDeviceCoord radius =
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(horizontal ? thumbRect.height : thumbRect.width) / 2.0f;
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ThemeDrawing::PaintRoundedRectWithRadius(aPaintData, thumbRect, color,
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sRGBColor::White(0.0f), 0.0f,
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radius / aDpiRatio, aDpiRatio);
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}
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bool ScrollbarDrawingAndroid::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 ScrollbarDrawingAndroid::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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void ScrollbarDrawingAndroid::RecomputeScrollbarParams() {
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uint32_t defaultSize = 6;
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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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// We make thin scrollbars as wide as auto ones because auto scrollbars on
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// android are already thin enough.
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ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::Yes, defaultSize);
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ConfigureScrollbarSize(StyleScrollbarWidth::Thin, Overlay::No, defaultSize);
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}
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