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a62f0eaf0a
This change switches `offsetParent`, `offsetLeft`, etc queries to use the BoxTree fragments instead of walking the entire fragment tree. In addition, fragments are stored for columns and colgroups. In general, this greatly simplifies the flow of the query and prevents having to do expensive tree walks. Testing: This change is covered by newly passing WPT tests and three new failures: - /css/filter-effects/backdrop-filter-edge-clipping-2.html - /css/filter-effects/backdrop-filter-edge-mirror.html - /css/filter-effects/backdrop-filter-edge-pixels-2.html These failures are actually progressions, because now the references start to render properly whereas before they did not. Fixes: This is part of #36525 and #36665. Signed-off-by: Martin Robinson <mrobinson@igalia.com> Co-authored-by: Oriol Brufau <obrufau@igalia.com>
95 lines
3.3 KiB
Rust
95 lines
3.3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use app_units::Au;
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use base::print_tree::PrintTree;
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use malloc_size_of_derive::MallocSizeOf;
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use servo_arc::Arc as ServoArc;
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use style::properties::ComputedValues;
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use super::{BaseFragment, BaseFragmentInfo, Fragment};
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use crate::cell::ArcRefCell;
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use crate::geom::PhysicalRect;
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/// Can contain child fragments with relative coordinates, but does not contribute to painting
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/// itself. [`PositioningFragment`]s may be completely anonymous, or just non-painting Fragments
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/// generated by boxes.
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#[derive(MallocSizeOf)]
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pub(crate) struct PositioningFragment {
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pub base: BaseFragment,
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pub rect: PhysicalRect<Au>,
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pub children: Vec<Fragment>,
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/// The scrollable overflow of this anonymous fragment's children.
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pub scrollable_overflow: PhysicalRect<Au>,
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/// If this fragment was created with a style, the style of the fragment.
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#[conditional_malloc_size_of]
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pub style: Option<ServoArc<ComputedValues>>,
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/// This [`PositioningFragment`]'s containing block rectangle in coordinates relative to
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/// the initial containing block, but not taking into account any transforms.
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pub cumulative_containing_block_rect: PhysicalRect<Au>,
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}
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impl PositioningFragment {
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pub fn new_anonymous(rect: PhysicalRect<Au>, children: Vec<Fragment>) -> ArcRefCell<Self> {
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Self::new_with_base_fragment(BaseFragment::anonymous(), None, rect, children)
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}
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pub fn new_empty(
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base_fragment_info: BaseFragmentInfo,
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rect: PhysicalRect<Au>,
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style: ServoArc<ComputedValues>,
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) -> ArcRefCell<Self> {
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Self::new_with_base_fragment(base_fragment_info.into(), Some(style), rect, Vec::new())
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}
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fn new_with_base_fragment(
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base: BaseFragment,
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style: Option<ServoArc<ComputedValues>>,
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rect: PhysicalRect<Au>,
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children: Vec<Fragment>,
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) -> ArcRefCell<Self> {
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let content_origin = rect.origin;
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let scrollable_overflow = children.iter().fold(PhysicalRect::zero(), |acc, child| {
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acc.union(
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&child
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.scrollable_overflow()
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.translate(content_origin.to_vector()),
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)
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});
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ArcRefCell::new(PositioningFragment {
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base,
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style,
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rect,
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children,
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scrollable_overflow,
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cumulative_containing_block_rect: PhysicalRect::zero(),
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})
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}
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pub(crate) fn set_containing_block(&mut self, containing_block: &PhysicalRect<Au>) {
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self.cumulative_containing_block_rect = *containing_block;
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}
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pub fn offset_by_containing_block(&self, rect: &PhysicalRect<Au>) -> PhysicalRect<Au> {
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rect.translate(self.cumulative_containing_block_rect.origin.to_vector())
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}
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pub fn print(&self, tree: &mut PrintTree) {
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tree.new_level(format!(
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"PositioningFragment\
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\nbase={:?}\
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\nrect={:?}\
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\nscrollable_overflow={:?}",
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self.base, self.rect, self.scrollable_overflow
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));
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for child in &self.children {
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child.print(tree);
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}
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tree.end_level();
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}
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}
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