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Auto merge of #7496 - servo:calc_, r=SimonSapin

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Implement CSS3 Calc

This is #7185 with one commit added to make it build merged with master, which got support for the `ch` unit in the meantime.

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This commit is contained in:
bors-servo 2015-09-02 02:33:18 -06:00
commit a547ae6826
21 changed files with 873 additions and 63 deletions
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9
components/layout/fragment.rs
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@ -463,6 +463,10 @@ impl ReplacedImageFragmentInfo {
MaybeAuto::Specified(container_size.scale_by(pc))
}
(LengthOrPercentageOrAuto::Percentage(_), _, None) => MaybeAuto::Auto,
(LengthOrPercentageOrAuto::Calc(calc), _, Some(container_size)) => {
MaybeAuto::Specified(calc.length() + container_size.scale_by(calc.percentage()))
}
(LengthOrPercentageOrAuto::Calc(_), _, None) => MaybeAuto::Auto,
(LengthOrPercentageOrAuto::Auto, Some(dom_length), _) => MaybeAuto::Specified(dom_length),
(LengthOrPercentageOrAuto::Auto, None, _) => MaybeAuto::Auto,
}
@ -616,6 +620,10 @@ impl IframeFragmentInfo {
let computed_size = match (content_size, containing_size) {
(LengthOrPercentageOrAuto::Length(length), _) => length,
(LengthOrPercentageOrAuto::Percentage(pc), Some(container_size)) => container_size.scale_by(pc),
(LengthOrPercentageOrAuto::Calc(calc), Some(container_size)) => {
container_size.scale_by(calc.percentage()) + calc.length()
},
(LengthOrPercentageOrAuto::Calc(calc), None) => calc.length(),
(LengthOrPercentageOrAuto::Percentage(_), None) => default_size,
(LengthOrPercentageOrAuto::Auto, _) => default_size,
};
@ -1285,6 +1293,7 @@ impl Fragment {
}
(Some(dom_inline_size), _) => dom_inline_size,
(None, LengthOrPercentageOrAuto::Length(length)) => length,
(None, LengthOrPercentageOrAuto::Calc(calc)) => calc.length(),
};
result.union_block(&IntrinsicISizes {
minimum_inline_size: image_inline_size,