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Issue #1784 - Add -moz-dark-theme media query and allow prefers-color-scheme to follow it.

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This commit is contained in:
athenian200 2021-06-22 18:14:44 +00:00 • committed by roytam1
commit efc6048941
3 changed files with 64 additions and 7 deletions
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64
layout/style/nsMediaFeatures.cpp
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@ -466,20 +466,60 @@ GetOperatingSystemVersion(nsPresContext* aPresContext, const nsMediaFeature* aFe
static nsresult
GetPrefersColorScheme(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
nsCSSValue& aResult)
{
switch(Preferences::GetInt("browser.display.prefers_color_scheme", 1)) {
case 1:
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_LIGHT,
eCSSUnit_Enumerated);
break;
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_LIGHT,
eCSSUnit_Enumerated);
break;
case 2:
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_DARK,
eCSSUnit_Enumerated);
break;
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_DARK,
eCSSUnit_Enumerated);
break;
case 3:
// If the pref is 3, we follow ui.color_scheme instead. When following
// ui.color_scheme, light theme is the fallback behavior.
switch(Preferences::GetInt("ui.color_scheme", 1)) {
case 2:
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_DARK,
eCSSUnit_Enumerated);
break;
default:
aResult.SetIntValue(NS_STYLE_PREFERS_COLOR_SCHEME_LIGHT,
eCSSUnit_Enumerated);
}
break;
default:
aResult.Reset();
aResult.Reset();
}
return NS_OK;
}
static nsresult
GetDarkTheme(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
nsCSSValue& aResult)
{
#ifdef XP_WIN
// Under Windows, do nothing if High Contrast Theme is on.
if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseAccessibilityTheme, 0)) {
aResult.Reset();
return NS_OK;
}
#endif
switch(Preferences::GetInt("ui.color_scheme", 1)) {
case 1:
aResult.SetIntValue(0, eCSSUnit_Integer);
break;
case 2:
aResult.SetIntValue(1, eCSSUnit_Integer);
break;
default:
aResult.Reset();
}
return NS_OK;
}
@ -645,6 +685,14 @@ nsMediaFeatures::features[] = {
},
// Mozilla extensions
{
&nsGkAtoms::_moz_dark_theme,
nsMediaFeature::eMinMaxNotAllowed,
nsMediaFeature::eBoolInteger,
nsMediaFeature::eNoRequirements,
{ nullptr },
GetDarkTheme
},
{
&nsGkAtoms::_moz_device_pixel_ratio,
nsMediaFeature::eMinMaxAllowed,