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Make IndependentFormattingContext a struct that owns styles

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… and has a private enum for its contents.

Privacy forces the rest of the code to go through methods
rather than matching on the enum,
reducing accidental layout-mode-specific behavior.
This commit is contained in:
Simon Sapin 2019-11-26 11:22:23 +01:00
parent 799057f1e6
commit b2b3ea992c
9 changed files with 149 additions and 123 deletions
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21
components/layout_2020/flow/mod.rs
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@ -7,6 +7,7 @@
use crate::context::LayoutContext;
use crate::flow::float::{FloatBox, FloatContext};
use crate::flow::inline::InlineFormattingContext;
use crate::formatting_contexts::IndependentFormattingContext;
use crate::fragments::{
AnonymousFragment, BoxFragment, CollapsedBlockMargins, CollapsedMargin, Fragment,
};
@ -15,7 +16,7 @@ use crate::positioned::{
adjust_static_positions, AbsolutelyPositionedBox, AbsolutelyPositionedFragment,
};
use crate::style_ext::{ComputedValuesExt, Position};
use crate::{relative_adjustement, ContainingBlock, IndependentFormattingContext};
use crate::{relative_adjustement, ContainingBlock};
use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator};
use rayon_croissant::ParallelIteratorExt;
use servo_arc::Arc;
@ -50,10 +51,7 @@ pub(crate) enum BlockLevelBox {
},
OutOfFlowAbsolutelyPositionedBox(AbsolutelyPositionedBox),
OutOfFlowFloatBox(FloatBox),
Independent {
style: Arc<ComputedValues>,
contents: IndependentFormattingContext,
},
Independent(IndependentFormattingContext),
}
pub(super) struct FlowChildren {
@ -292,19 +290,24 @@ impl BlockLevelBox {
},
))
},
BlockLevelBox::Independent { style, contents } => match contents.as_replaced() {
BlockLevelBox::Independent(contents) => match contents.as_replaced() {
Ok(replaced) => {
// FIXME
match *replaced {}
},
Err(contents) => Fragment::Box(layout_in_flow_non_replaced_block_level(
Err(non_replaced) => Fragment::Box(layout_in_flow_non_replaced_block_level(
layout_context,
containing_block,
absolutely_positioned_fragments,
style,
&contents.style,
BlockLevelKind::EstablishesAnIndependentFormattingContext,
|containing_block, nested_abspos, _| {
contents.layout(layout_context, containing_block, tree_rank, nested_abspos)
non_replaced.layout(
layout_context,
containing_block,
tree_rank,
nested_abspos,
)
},
)),
},