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/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNativeBasicThemeGTK.h"
#include "nsLayoutUtils.h"
using namespace mozilla;
static constexpr CSSCoord kGtkMinimumScrollbarSize = 12;
static constexpr CSSCoord kGtkMinimumThinScrollbarSize = 6;
static constexpr CSSCoord kGtkMinimumScrollbarThumbSize = 40;
already_AddRefed<nsITheme> do_GetBasicNativeThemeDoNotUseDirectly() {
static mozilla::StaticRefPtr<nsITheme> gInstance;
if (MOZ_UNLIKELY(!gInstance)) {
gInstance = new nsNativeBasicThemeGTK();
ClearOnShutdown(&gInstance);
}
return do_AddRef(gInstance);
}
nsITheme::Transparency nsNativeBasicThemeGTK::GetWidgetTransparency(
nsIFrame* aFrame, StyleAppearance aAppearance) {
switch (aAppearance) {
case StyleAppearance::ScrollbarVertical:
case StyleAppearance::ScrollbarHorizontal:
// Make scrollbar tracks opaque on the window's scroll frame to prevent
// leaf layers from overlapping. See bug 1179780.
return IsRootScrollbar(aFrame) ? eOpaque : eTransparent;
default:
return nsNativeBasicTheme::GetWidgetTransparency(aFrame, aAppearance);
}
}
NS_IMETHODIMP
nsNativeBasicThemeGTK::GetMinimumWidgetSize(nsPresContext* aPresContext,
nsIFrame* aFrame,
StyleAppearance aAppearance,
LayoutDeviceIntSize* aResult,
bool* aIsOverridable) {
DPIRatio dpiRatio = GetDPIRatio(aFrame);
switch (aAppearance) {
case StyleAppearance::ScrollbarVertical:
case StyleAppearance::ScrollbarHorizontal:
case StyleAppearance::ScrollbarbuttonUp:
case StyleAppearance::ScrollbarbuttonDown:
case StyleAppearance::ScrollbarbuttonLeft:
case StyleAppearance::ScrollbarbuttonRight:
case StyleAppearance::ScrollbarthumbVertical:
case StyleAppearance::ScrollbarthumbHorizontal:
case StyleAppearance::ScrollbartrackHorizontal:
case StyleAppearance::ScrollbartrackVertical:
case StyleAppearance::Scrollcorner: {
ComputedStyle* style = nsLayoutUtils::StyleForScrollbar(aFrame);
if (style->StyleUIReset()->mScrollbarWidth == StyleScrollbarWidth::Thin) {
aResult->SizeTo(kGtkMinimumThinScrollbarSize * dpiRatio,
kGtkMinimumThinScrollbarSize * dpiRatio);
} else {
aResult->SizeTo(kGtkMinimumScrollbarSize * dpiRatio,
kGtkMinimumScrollbarSize * dpiRatio);
}
break;
}
default:
return nsNativeBasicTheme::GetMinimumWidgetSize(
aPresContext, aFrame, aAppearance, aResult, aIsOverridable);
}
switch (aAppearance) {
case StyleAppearance::ScrollbarthumbHorizontal:
aResult->width = kGtkMinimumScrollbarThumbSize * dpiRatio;
break;
case StyleAppearance::ScrollbarthumbVertical:
aResult->height = kGtkMinimumScrollbarThumbSize * dpiRatio;
break;
default:
break;
}
*aIsOverridable = true;
return NS_OK;
}
void nsNativeBasicThemeGTK::PaintScrollbarThumb(
DrawTarget* aDrawTarget, const LayoutDeviceRect& aRect, bool aHorizontal,
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
DPIRatio aDpiRatio) {
sRGBColor thumbColor =
ComputeScrollbarThumbColor(aFrame, aStyle, aElementState, aDocumentState);
LayoutDeviceRect thumbRect(aRect);
thumbRect.Deflate(floorf((aHorizontal ? aRect.height : aRect.width) / 4.0f));
LayoutDeviceCoord radius =
(aHorizontal ? thumbRect.height : thumbRect.width) / 2.0f;
PaintRoundedRectWithRadius(aDrawTarget, thumbRect, thumbColor, sRGBColor(), 0,
radius / aDpiRatio, aDpiRatio);
}
void nsNativeBasicThemeGTK::PaintScrollbar(DrawTarget* aDrawTarget,
const LayoutDeviceRect& aRect,
bool aHorizontal, nsIFrame* aFrame,
const ComputedStyle& aStyle,
const EventStates& aDocumentState,
DPIRatio aDpiRatio, bool aIsRoot) {
auto [trackColor, borderColor] =
ComputeScrollbarColors(aFrame, aStyle, aDocumentState, aIsRoot);
Unused << borderColor;
aDrawTarget->FillRect(aRect.ToUnknownRect(),
gfx::ColorPattern(ToDeviceColor(trackColor)));
}
void nsNativeBasicThemeGTK::PaintScrollCorner(
DrawTarget* aDrawTarget, const LayoutDeviceRect& aRect, nsIFrame* aFrame,
const ComputedStyle& aStyle, const EventStates& aDocumentState,
DPIRatio aDpiRatio, bool aIsRoot) {
auto [trackColor, borderColor] =
ComputeScrollbarColors(aFrame, aStyle, aDocumentState, aIsRoot);
Unused << borderColor;
aDrawTarget->FillRect(aRect.ToUnknownRect(),
gfx::ColorPattern(ToDeviceColor(trackColor)));
}
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