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Issue #1705 - Part 9: Implement scrollbar-width:thin on Mac (cocoa).

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This commit is contained in:
Moonchild 2021-01-09 23:21:36 +00:00 • committed by roytam1
commit b523c3be80
1 changed files with 47 additions and 20 deletions
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63
widget/cocoa/nsNativeThemeCocoa.mm
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@ -2279,6 +2279,12 @@ IsHiDPIContext(nsPresContext* aContext)
2 * aContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
}
static bool
IsScrollbarWidthThin(nsIFrame* aFrame)
{
return aFrame->StyleUserInterface()->mScrollbarWidth == StyleScrollbarWidth::Thin;
}
NS_IMETHODIMP
nsNativeThemeCocoa::DrawWidgetBackground(nsRenderingContext* aContext,
nsIFrame* aFrame,
@ -3392,13 +3398,24 @@ nsNativeThemeCocoa::GetMinimumWidgetSize(nsPresContext* aPresContext,
// Find our parent scrollbar frame in order to find out whether we're in
// a small or a large scrollbar.
nsIFrame *scrollbarFrame = GetParentScrollbarFrame(aFrame);
if (!scrollbarFrame)
if (!scrollbarFrame) {
return NS_ERROR_FAILURE;
}
bool isSmall = (scrollbarFrame->StyleDisplay()->mAppearance == NS_THEME_SCROLLBAR_SMALL);
bool isHorizontal = (aWidgetType == NS_THEME_SCROLLBARTHUMB_HORIZONTAL);
int32_t& minSize = isHorizontal ? aResult->width : aResult->height;
minSize = isSmall ? kSmallScrollbarThumbMinSize : kRegularScrollbarThumbMinSize;
int32_t& minSize = isSmall ? kSmallScrollbarThumbMinSize : kRegularScrollbarThumbMinSize;
if (IsScrollbarWidthThin(aFrame)) {
minSize /= 2;
}
if (isHorizontal) {
aResult->width = kRegularScrollbarThumbMinSize;
aResult->height = minSize;
} else {
aResult->width = minSize;
aResult->height = kRegularScrollbarThumbMinSize;
}
break;
}
@ -3419,6 +3436,9 @@ nsNativeThemeCocoa::GetMinimumWidgetSize(nsPresContext* aPresContext,
else {
aResult->SizeTo(16, 16);
}
if (IsScrollbarWidthThin(aFrame)) {
aResult->SizeTo(8, 8);
}
break;
}
@ -3435,6 +3455,9 @@ nsNativeThemeCocoa::GetMinimumWidgetSize(nsPresContext* aPresContext,
kThemeMetricScrollBarWidth;
SInt32 scrollbarWidth = 0;
::GetThemeMetric(themeMetric, &scrollbarWidth);
if (IsScrollbarWidthThin(aFrame)) {
scrollbarWidth /= 2;
}
aResult->SizeTo(scrollbarWidth, scrollbarWidth);
break;
}
@ -3467,22 +3490,26 @@ nsNativeThemeCocoa::GetMinimumWidgetSize(nsPresContext* aPresContext,
case NS_THEME_SCROLLBARBUTTON_LEFT:
case NS_THEME_SCROLLBARBUTTON_RIGHT:
{
nsIFrame *scrollbarFrame = GetParentScrollbarFrame(aFrame);
if (!scrollbarFrame) return NS_ERROR_FAILURE;
if (!IsScrollbarWidthThin(aFrame)) {
// Get scrollbar button metrics from the system, except in the case of
// thin scrollbars, where we leave them at 0 (collapse)
// Since there is no NS_THEME_SCROLLBARBUTTON_UP_SMALL we need to ask the parent what appearance style it has.
int32_t themeMetric = (scrollbarFrame->StyleDisplay()->mAppearance == NS_THEME_SCROLLBAR_SMALL) ?
kThemeMetricSmallScrollBarWidth :
kThemeMetricScrollBarWidth;
SInt32 scrollbarWidth = 0;
::GetThemeMetric(themeMetric, &scrollbarWidth);
nsIFrame *scrollbarFrame = GetParentScrollbarFrame(aFrame);
if (!scrollbarFrame) return NS_ERROR_FAILURE;
// It seems that for both sizes of scrollbar, the buttons are one pixel "longer".
if (aWidgetType == NS_THEME_SCROLLBARBUTTON_LEFT || aWidgetType == NS_THEME_SCROLLBARBUTTON_RIGHT)
aResult->SizeTo(scrollbarWidth+1, scrollbarWidth);
else
aResult->SizeTo(scrollbarWidth, scrollbarWidth+1);
// Since there is no NS_THEME_SCROLLBARBUTTON_UP_SMALL we need to ask the parent what appearance style it has.
int32_t themeMetric = (scrollbarFrame->StyleDisplay()->mAppearance == NS_THEME_SCROLLBAR_SMALL) ?
kThemeMetricSmallScrollBarWidth :
kThemeMetricScrollBarWidth;
SInt32 scrollbarWidth = 0;
::GetThemeMetric(themeMetric, &scrollbarWidth);
// It seems that for both sizes of scrollbar, the buttons are one pixel "longer".
if (aWidgetType == NS_THEME_SCROLLBARBUTTON_LEFT || aWidgetType == NS_THEME_SCROLLBARBUTTON_RIGHT)
aResult->SizeTo(scrollbarWidth+1, scrollbarWidth);
else
aResult->SizeTo(scrollbarWidth, scrollbarWidth+1);
}
*aIsOverridable = false;
break;
}