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layout: Implement most of border-collapse per CSS 2.1 § 17.6.2.

Browse source 
Known issues:

* Collapsed borders do not correctly affect the border-box of the table
  itself.

* The content widths of all cells in a column and the content height of
  all cells in a row is the same in this patch, but not in Gecko and
  WebKit.

* Corners are not painted well. The spec does not say what to do here.

* Column spans are not handled well. The spec does not say what to do
  here either.
This commit is contained in:
Patrick Walton 2015-03-09 12:33:04 -07:00 • committed by Simon Sapin
parent 92359c7b9a
commit 48299a53cb
22 changed files with 1975 additions and 520 deletions
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14
components/util/geometry.rs
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@ -245,6 +245,20 @@ impl Au {
NumCast::from(px.get() * 60f32).unwrap()
}
/// Rounds this app unit down to the previous (left or top) pixel and returns it.
#[inline]
pub fn to_prev_px(&self) -> isize {
let Au(s) = *self;
((s as f64) / 60f64).floor() as isize
}
/// Rounds this app unit up to the next (right or bottom) pixel and returns it.
#[inline]
pub fn to_next_px(&self) -> isize {
let Au(s) = *self;
((s as f64) / 60f64).ceil() as isize
}
#[inline]
pub fn to_nearest_px(&self) -> isize {
let Au(s) = *self;