diff options
Diffstat (limited to 'components/layout/fragment.rs')
| -rw-r--r-- | components/layout/fragment.rs | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/components/layout/fragment.rs b/components/layout/fragment.rs index d9fd9db4839..def9cd33776 100644 --- a/components/layout/fragment.rs +++ b/components/layout/fragment.rs @@ -1481,11 +1481,31 @@ impl Fragment { self.style = (*new_style).clone() } - pub fn abs_bounds_from_origin(&self, fragment_origin: &Point2D<Au>) -> Rect<Au> { + /// Given the stacking-context-relative position of the containing flow, returns the boundaries + /// of this fragment relative to the parent stacking context. + pub fn stacking_relative_bounds(&self, stacking_relative_flow_origin: &Point2D<Au>) + -> Rect<Au> { // FIXME(#2795): Get the real container size let container_size = Size2D::zero(); - self.border_box.to_physical(self.style.writing_mode, container_size) - .translate(fragment_origin) + self.border_box + .to_physical(self.style.writing_mode, container_size) + .translate(stacking_relative_flow_origin) + } + + /// Returns true if this fragment establishes a new stacking context and false otherwise. + pub fn establishes_stacking_context(&self) -> bool { + match self.style().get_box().position { + position::absolute | position::fixed => { + // FIXME(pcwalton): This should only establish a new stacking context when + // `z-index` is not `auto`. But this matches what we did before. + true + } + position::relative | position::static_ => { + // FIXME(pcwalton): `position: relative` establishes a new stacking context if + // `z-index` is not `auto`. But this matches what we did before. + false + } + } } } |