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Add support for 'padding-box' value for 'box-sizing' property (fixes #6032)

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Spec: http://dev.w3.org/csswg/css-ui/#valdef-box-sizing-padding-box
Currently, only Firefox is supporting this value.
This commit is contained in:
Jinwoo Song 2015-05-13 14:37:17 +09:00
parent b3b9deafa7
commit 945adabd48
6 changed files with 27 additions and 1 deletions
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7
components/layout/block.rs
View file

@ -346,8 +346,10 @@ impl CandidateBSizeIterator {
};
// If the style includes `box-sizing: border-box`, subtract the border and padding.
// If the style includes `box-sizing: padding-box`, subtract the border.
let adjustment_for_box_sizing = match fragment.style.get_box().box_sizing {
box_sizing::T::border_box => fragment.border_padding.block_start_end(),
box_sizing::T::padding_box => fragment.padding_width().block_start_end(),
box_sizing::T::content_box => Au(0),
};
@ -2049,7 +2051,12 @@ pub trait ISizeAndMarginsComputer {
computed_inline_size =
MaybeAuto::Specified(size - block.fragment.border_padding.inline_start_end())
}
(MaybeAuto::Specified(size), box_sizing::T::padding_box) => {
computed_inline_size =
MaybeAuto::Specified(size - block.fragment.padding_width().inline_start_end())
}
(MaybeAuto::Auto, box_sizing::T::border_box) |
(MaybeAuto::Auto, box_sizing::T::padding_box) |
(_, box_sizing::T::content_box) => {}
}

4
components/layout/fragment.rs
View file

@ -999,6 +999,10 @@ impl Fragment {
}
}
pub fn padding_width(&self) -> LogicalMargin<Au> {
self.border_padding - self.border_width()
}
/// Computes the margins in the inline direction from the containing block inline-size and the
/// style. After this call, the inline direction of the `margin` field will be correct.
///