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92 lines
3.6 KiB
C++
92 lines
3.6 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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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 sizes =
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GetScrollbarSizes(aPresContext, StyleScrollbarWidth::Auto, Overlay::Yes);
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MOZ_ASSERT(sizes.mHorizontal == sizes.mVertical);
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return LayoutDeviceIntSize{sizes.mHorizontal, sizes.mVertical};
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}
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auto ScrollbarDrawingAndroid::GetScrollbarSizes(nsPresContext* aPresContext,
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StyleScrollbarWidth aWidth,
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Overlay aOverlay)
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-> ScrollbarSizes {
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// We force auto-width scrollbars because scrollbars on android are already
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// thin enough.
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return ScrollbarDrawing::GetScrollbarSizes(
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aPresContext, StyleScrollbarWidth::Auto, aOverlay);
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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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bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const EventStates& aElementState, const EventStates& 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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// Draw the thumb rect centered in the scrollbar.
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LayoutDeviceRect thumbRect(aRect);
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if (aHorizontal) {
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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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(aHorizontal ? 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, bool aHorizontal,
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nsIFrame* aFrame, const ComputedStyle& aStyle,
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const EventStates& aElementState, const EventStates& aDocumentState,
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const Colors& aColors, const DPIRatio& aDpiRatio) {
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DoPaintScrollbarThumb(aDt, aRect, aHorizontal, aFrame, aStyle, aElementState,
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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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bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
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const EventStates& aElementState, const EventStates& aDocumentState,
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const Colors& aColors, const DPIRatio& aDpiRatio) {
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DoPaintScrollbarThumb(aWrData, aRect, aHorizontal, 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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mHorizontalScrollbarHeight = mVerticalScrollbarWidth = defaultSize;
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}
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