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CSSOM bits for @supports: CSSConditionRule and CSSSupportsRule, with conditionText attribute

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This commit is contained in:
Manish Goregaokar 2017-01-03 11:10:12 -08:00
parent 1b0842e228
commit b4a83b6cec
12 changed files with 199 additions and 5 deletions
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4
components/script/dom/cssrule.rs
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@ -15,6 +15,7 @@ use dom::cssmediarule::CSSMediaRule;
use dom::cssnamespacerule::CSSNamespaceRule;
use dom::cssstylerule::CSSStyleRule;
use dom::cssstylesheet::CSSStyleSheet;
use dom::csssupportsrule::CSSSupportsRule;
use dom::cssviewportrule::CSSViewportRule;
use dom::window::Window;
use std::cell::Cell;
@ -59,6 +60,8 @@ impl CSSRule {
rule as &SpecificCSSRule
} else if let Some(rule) = self.downcast::<CSSImportRule>() {
rule as &SpecificCSSRule
} else if let Some(rule) = self.downcast::<CSSSupportsRule>() {
rule as &SpecificCSSRule
} else {
unreachable!()
}
@ -77,6 +80,7 @@ impl CSSRule {
StyleCssRule::Media(s) => Root::upcast(CSSMediaRule::new(window, parent_stylesheet, s)),
StyleCssRule::Namespace(s) => Root::upcast(CSSNamespaceRule::new(window, parent_stylesheet, s)),
StyleCssRule::Viewport(s) => Root::upcast(CSSViewportRule::new(window, parent_stylesheet, s)),
StyleCssRule::Supports(s) => Root::upcast(CSSSupportsRule::new(window, parent_stylesheet, s)),
}
}