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Compute content box for children with box-sizing: border-box correctly.

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Fixes #10258
This commit is contained in:
Michael Howell 2016-03-29 13:49:23 -07:00
parent 38f683fcbc
commit 61c7ee917e
1 changed files with 8 additions and 1 deletions
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9
components/layout/block.rs
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@ -1308,8 +1308,15 @@ impl BlockFlow {
let opaque_self = OpaqueFlow::from_flow(self); let opaque_self = OpaqueFlow::from_flow(self);
// Calculate non-auto block size to pass to children. // Calculate non-auto block size to pass to children.
let box_border = match self.fragment.style().get_box().box_sizing {
box_sizing::T::border_box => self.fragment.border_padding.block_start_end(),
box_sizing::T::content_box => Au(0),
};
let parent_container_size = self.explicit_block_containing_size(layout_context); let parent_container_size = self.explicit_block_containing_size(layout_context);
let explicit_content_size = self.explicit_block_size(parent_container_size); // https://drafts.csswg.org/css-ui-3/#box-sizing
let explicit_content_size = self
.explicit_block_size(parent_container_size)
.map(|x| if x < box_border { Au(0) } else { x - box_border });
// Calculate containing block inline size. // Calculate containing block inline size.
let containing_block_size = if flags.contains(IS_ABSOLUTELY_POSITIONED) { let containing_block_size = if flags.contains(IS_ABSOLUTELY_POSITIONED) {