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Add opacify() et al

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Natalie Weizenbaum 2016-09-21 13:56:23 -07:00 committed by Natalie Weizenbaum
parent 04b012befe
commit 8b8f6bfbee
1 changed files with 21 additions and 0 deletions
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21
lib/src/functions.dart
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@ -222,6 +222,13 @@ void defineCoreFunctions(Environment environment) {
return new SassNumber(color.alpha);
}));
environment.setFunction(new BuiltInCallable("opacify", r"$color", _opacify));
environment.setFunction(new BuiltInCallable("fade-in", r"$color", _opacify));
environment.setFunction(
new BuiltInCallable("transparentize", r"$color", _transparentize));
environment
.setFunction(new BuiltInCallable("fade-out", r"$color", _transparentize));
// ## Introspection
environment.setFunction(new BuiltInCallable("inspect", r"$value",
@ -280,3 +287,17 @@ SassColor _mix(SassColor color1, SassColor color2, SassNumber weight) {
(color1.blue * weight1 + color2.blue * weight2).round(),
color1.alpha * weightScale + color2.alpha * (1 - weightScale));
}
SassColor _opacify(List<Value> arguments) {
var color = arguments[0].assertColor("color");
var amount = arguments[1].assertNumber("amount");
return color.changeAlpha(color.alpha + amount.valueInRange(0, 1, "amount"));
}
SassColor _transparentize(List<Value> arguments) {
var color = arguments[0].assertColor("color");
var amount = arguments[1].assertNumber("amount");
return color.changeAlpha(color.alpha - amount.valueInRange(0, 1, "amount"));
}