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layout: Add LayoutBoxBase and use it for IndependentFormattingContext (#34507)

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Add a new struct `LayoutBoxBase`, that will be used throughout the box
tree. The idea of this struct is that we have a place to consistently
store common layout information (style and node information) and also to
cache layout results such as content sizes (inline and maybe later box
sizes) and eventually layout results.

In addition to the addition of this struct,
`IndependentFormattingContext` is flattened slightly so that it directly
holds the contents of both replaced and non-replaced elements.

This is only added to independent formatting contexts, but will later be
added to all block containers as well.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2024-12-07 20:12:25 +01:00 • committed by GitHub
parent 97e9841d47
commit 264c0f972f
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GPG key ID: B5690EEEBB952194
16 changed files with 425 additions and 441 deletions
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6
components/layout_2020/flow/root.rs
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@ -28,7 +28,7 @@ use crate::formatting_contexts::IndependentFormattingContext;
use crate::fragment_tree::FragmentTree;
use crate::geom::{LogicalVec2, PhysicalPoint, PhysicalRect, PhysicalSize};
use crate::positioned::{AbsolutelyPositionedBox, PositioningContext};
use crate::replaced::ReplacedContent;
use crate::replaced::ReplacedContents;
use crate::style_ext::{ComputedValuesExt, Display, DisplayGeneratingBox, DisplayInside};
use crate::taffy::{TaffyItemBox, TaffyItemBoxInner};
use crate::DefiniteContainingBlock;
@ -222,7 +222,7 @@ impl BoxTree {
loop {
if let Some((primary_style, display_inside, update_point)) = update_point(dirty_node) {
let contents = ReplacedContent::for_element(dirty_node, context)
let contents = ReplacedContents::for_element(dirty_node, context)
.map_or_else(|| NonReplacedContents::OfElement.into(), Contents::Replaced);
let info = NodeAndStyleInfo::new(dirty_node, Arc::clone(&primary_style));
let out_of_flow_absolutely_positioned_box = ArcRefCell::new(
@ -290,7 +290,7 @@ fn construct_for_root_element<'dom>(
Display::GeneratingBox(display_generating_box) => display_generating_box.display_inside(),
};
let contents = ReplacedContent::for_element(root_element, context)
let contents = ReplacedContents::for_element(root_element, context)
.map_or_else(|| NonReplacedContents::OfElement.into(), Contents::Replaced);
let root_box = if box_style.position.is_absolutely_positioned() {
BlockLevelBox::OutOfFlowAbsolutelyPositionedBox(ArcRefCell::new(