mirror of
https://github.com/servo/servo.git
synced 2025-08-09 23:45:35 +01:00
Fix offsetLeft/offsetTop to match major browsers (#32761)
* Fix offsetLeft/offsetTop to match major browsers See: https://github.com/w3c/csswg-drafts/issues/10549 Signed-off-by: Nico Burns <nico@nicoburns.com> Fix crash when <html> element is absolutely positioned Signed-off-by: Nico Burns <nico@nicoburns.com> * Update test expectations Signed-off-by: Nico Burns <nico@nicoburns.com> * Update test expectations again Signed-off-by: Nico Burns <nico@nicoburns.com> * Use PhysicalRect and PhysicalVec types Signed-off-by: Nico Burns <nico@nicoburns.com> * Use is_some_and Signed-off-by: Nico Burns <nico@nicoburns.com> * clippy Signed-off-by: Nico Burns <nico@nicoburns.com> * Apply comment changes from code review Co-authored-by: Oriol Brufau <obrufau@igalia.com> Signed-off-by: Nico Burns <nico@nicoburns.com> --------- Signed-off-by: Nico Burns <nico@nicoburns.com> Co-authored-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Nico Burns
GitHub
parent
ee63174d6f
commit
6955950948
22 changed files with 82 additions and 1209 deletions
|
|
@ -37,6 +37,7 @@ use style_traits::{ParsingMode, ToCss};
|
|||
|
||||
use crate::flow::inline::construct::{TextTransformation, WhitespaceCollapse};
|
||||
use crate::fragment_tree::{BoxFragment, Fragment, FragmentFlags, FragmentTree, Tag};
|
||||
use crate::geom::{PhysicalRect, PhysicalVec};
|
||||
|
||||
pub fn process_content_box_request(
|
||||
requested_node: OpaqueNode,
|
||||
|
|
@ -335,10 +336,11 @@ fn process_offset_parent_query_inner(
|
|||
struct NodeOffsetBoxInfo {
|
||||
border_box: Rect<Au>,
|
||||
offset_parent_node_address: Option<OpaqueNode>,
|
||||
is_static_body_element: bool,
|
||||
}
|
||||
|
||||
// https://www.w3.org/TR/2016/WD-cssom-view-1-20160317/#extensions-to-the-htmlelement-interface
|
||||
let mut parent_node_addresses = Vec::new();
|
||||
let mut parent_node_addresses: Vec<Option<(OpaqueNode, bool)>> = Vec::new();
|
||||
let tag_to_find = Tag::new(node);
|
||||
let node_offset_box = fragment_tree.find(|fragment, level, containing_block| {
|
||||
let base = fragment.base()?;
|
||||
|
|
@ -385,7 +387,7 @@ fn process_offset_parent_query_inner(
|
|||
border_box.origin = Point2D::zero();
|
||||
}
|
||||
|
||||
let offset_parent_node_address = if is_fixed {
|
||||
let offset_parent_node = if is_fixed {
|
||||
None
|
||||
} else {
|
||||
// Find the nearest ancestor element eligible as `offsetParent`.
|
||||
|
|
@ -398,15 +400,20 @@ fn process_offset_parent_query_inner(
|
|||
|
||||
Some(NodeOffsetBoxInfo {
|
||||
border_box,
|
||||
offset_parent_node_address,
|
||||
offset_parent_node_address: offset_parent_node.map(|node| node.0),
|
||||
is_static_body_element: offset_parent_node.is_some_and(|node| node.1),
|
||||
})
|
||||
} else {
|
||||
// Record the paths of the nodes being traversed.
|
||||
let parent_node_address = match fragment {
|
||||
Fragment::Box(fragment) | Fragment::Float(fragment) => {
|
||||
let is_eligible_parent = is_eligible_parent(fragment);
|
||||
let is_static_body_element = is_body_element &&
|
||||
fragment.style.get_box().position == Position::Static;
|
||||
match base.tag {
|
||||
Some(tag) if is_eligible_parent && !tag.is_pseudo() => Some(tag.node),
|
||||
Some(tag) if is_eligible_parent && !tag.is_pseudo() => {
|
||||
Some((tag.node, is_static_body_element))
|
||||
},
|
||||
_ => None,
|
||||
}
|
||||
},
|
||||
|
|
@ -432,9 +439,36 @@ fn process_offset_parent_query_inner(
|
|||
// zero and terminate this algorithm." (others)
|
||||
let node_offset_box = node_offset_box?;
|
||||
|
||||
let offset_parent_padding_box_corner = node_offset_box
|
||||
.offset_parent_node_address
|
||||
.map(|offset_parent_node_address| {
|
||||
let offset_parent_padding_box_corner = if let Some(offset_parent_node_address) =
|
||||
node_offset_box.offset_parent_node_address
|
||||
{
|
||||
// The spec (https://www.w3.org/TR/cssom-view-1/#extensions-to-the-htmlelement-interface)
|
||||
// says that offsetTop/offsetLeft are always relative to the padding box of the offsetParent.
|
||||
// However, in practice this is not true in major browsers in the case that the offsetParent is the body
|
||||
// element and the body element is position:static. In that case offsetLeft/offsetTop are computed
|
||||
// relative to the root node's border box.
|
||||
if node_offset_box.is_static_body_element {
|
||||
fn extract_box_fragment(
|
||||
fragment: &Fragment,
|
||||
containing_block: &PhysicalRect<Au>,
|
||||
) -> PhysicalVec<Au> {
|
||||
let (Fragment::Box(fragment) | Fragment::Float(fragment)) = fragment else {
|
||||
unreachable!();
|
||||
};
|
||||
// Again, take the *first* associated CSS layout box.
|
||||
fragment.border_rect().origin.to_vector() + containing_block.origin.to_vector()
|
||||
}
|
||||
|
||||
let containing_block = &fragment_tree.initial_containing_block;
|
||||
let fragment = &(*fragment_tree.root_fragments[0].borrow());
|
||||
if let Fragment::AbsoluteOrFixedPositioned(shared_fragment) = fragment {
|
||||
let shared_fragment = &*shared_fragment.borrow();
|
||||
let fragment = &*shared_fragment.fragment.as_ref().unwrap().borrow();
|
||||
extract_box_fragment(fragment, containing_block)
|
||||
} else {
|
||||
extract_box_fragment(fragment, containing_block)
|
||||
}
|
||||
} else {
|
||||
// Find the top and left padding edges of "the first CSS layout box
|
||||
// associated with the `offsetParent` of the element".
|
||||
//
|
||||
|
|
@ -447,27 +481,27 @@ fn process_offset_parent_query_inner(
|
|||
Fragment::Box(fragment) | Fragment::Float(fragment) => {
|
||||
if fragment.base.tag == Some(offset_parent_node_tag) {
|
||||
// Again, take the *first* associated CSS layout box.
|
||||
let padding_box_corner =
|
||||
fragment.padding_rect().origin.to_vector() +
|
||||
containing_block.origin.to_vector();
|
||||
let padding_box_corner = padding_box_corner.to_untyped();
|
||||
let padding_box_corner = fragment.padding_rect().origin.to_vector()
|
||||
+ containing_block.origin.to_vector();
|
||||
Some(padding_box_corner)
|
||||
} else {
|
||||
None
|
||||
}
|
||||
},
|
||||
Fragment::AbsoluteOrFixedPositioned(_) |
|
||||
Fragment::Text(_) |
|
||||
Fragment::Image(_) |
|
||||
Fragment::IFrame(_) |
|
||||
Fragment::Positioning(_) => None,
|
||||
Fragment::AbsoluteOrFixedPositioned(_)
|
||||
| Fragment::Text(_)
|
||||
| Fragment::Image(_)
|
||||
| Fragment::IFrame(_)
|
||||
| Fragment::Positioning(_) => None,
|
||||
}
|
||||
})
|
||||
.unwrap()
|
||||
})
|
||||
}
|
||||
} else {
|
||||
// "If the offsetParent of the element is null," subtract zero in the
|
||||
// following step.
|
||||
.unwrap_or(Vector2D::zero());
|
||||
Vector2D::zero()
|
||||
};
|
||||
|
||||
Some(OffsetParentResponse {
|
||||
node_address: node_offset_box.offset_parent_node_address.map(Into::into),
|
||||
|
|
@ -480,7 +514,7 @@ fn process_offset_parent_query_inner(
|
|||
// versa for the top border edge)
|
||||
rect: node_offset_box
|
||||
.border_box
|
||||
.translate(-offset_parent_padding_box_corner),
|
||||
.translate(-offset_parent_padding_box_corner.to_untyped()),
|
||||
})
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue