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Replace the closure in layout_in_flow_non_replaced_block_level with an enum

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This commit is contained in:
Simon Sapin 2019-12-13 12:09:51 +01:00
parent 6fce97c65c
commit c0962aa3fc
1 changed files with 38 additions and 45 deletions
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83
components/layout_2020/flow/mod.rs
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@ -7,7 +7,7 @@
use crate::context::LayoutContext;
use crate::flow::float::{FloatBox, FloatContext};
use crate::flow::inline::InlineFormattingContext;
use crate::formatting_contexts::{IndependentFormattingContext, IndependentLayout};
use crate::formatting_contexts::{IndependentFormattingContext, IndependentLayout, NonReplacedIFC};
use crate::fragments::{AnonymousFragment, BoxFragment, Fragment};
use crate::fragments::{CollapsedBlockMargins, CollapsedMargin};
use crate::geom::flow_relative::{Rect, Sides, Vec2};
@ -274,19 +274,9 @@ impl BlockLevelBox {
positioning_context,
containing_block,
style,
BlockLevelKind::SameFormattingContextBlock,
|positioning_context,
containing_block,
collapsible_with_parent_start_margin| {
contents.layout(
layout_context,
positioning_context,
containing_block,
tree_rank,
float_context,
collapsible_with_parent_start_margin,
)
},
BlockLevelKind::SameFormattingContextBlock(contents),
tree_rank,
float_context
))
},
BlockLevelBox::Independent(contents) => match contents.as_replaced() {
@ -300,20 +290,9 @@ impl BlockLevelBox {
positioning_context,
containing_block,
&contents.style,
BlockLevelKind::EstablishesAnIndependentFormattingContext,
|positioning_context, containing_block, _| {
let independent_layout = non_replaced.layout(
layout_context,
positioning_context,
containing_block,
tree_rank,
);
FlowLayout {
fragments: independent_layout.fragments,
content_block_size: independent_layout.content_block_size,
collapsible_margins_in_children: CollapsedBlockMargins::zero(),
}
},
BlockLevelKind::EstablishesAnIndependentFormattingContext(non_replaced),
tree_rank,
float_context
)),
},
BlockLevelBox::OutOfFlowAbsolutelyPositionedBox(box_) => {
@ -332,10 +311,9 @@ impl BlockLevelBox {
}
}
#[derive(PartialEq)]
enum BlockLevelKind {
SameFormattingContextBlock,
EstablishesAnIndependentFormattingContext,
enum BlockLevelKind<'a> {
SameFormattingContextBlock(&'a BlockContainer),
EstablishesAnIndependentFormattingContext(NonReplacedIFC<'a>),
}
/// https://drafts.csswg.org/css2/visudet.html#blockwidth
@ -345,12 +323,9 @@ fn layout_in_flow_non_replaced_block_level<'a>(
positioning_context: &mut PositioningContext<'a>,
containing_block: &ContainingBlock,
style: &Arc<ComputedValues>,
block_level_kind: BlockLevelKind,
layout_contents: impl FnOnce(
&mut PositioningContext<'a>,
&ContainingBlock,
CollapsibleWithParentStartMargin,
) -> FlowLayout,
block_level_kind: BlockLevelKind<'a>,
tree_rank: usize,
float_context: Option<&mut FloatContext>,
) -> BoxFragment {
let cbis = containing_block.inline_size;
let padding = style.padding().percentages_relative_to(cbis);
@ -424,20 +399,38 @@ fn layout_in_flow_non_replaced_block_level<'a>(
);
let this_start_margin_can_collapse_with_children = CollapsibleWithParentStartMargin(
block_level_kind == BlockLevelKind::SameFormattingContextBlock &&
matches!(block_level_kind, BlockLevelKind::SameFormattingContextBlock(_)) &&
pb.block_start == Length::zero(),
);
let this_end_margin_can_collapse_with_children = block_size == LengthOrAuto::Auto &&
min_box_size.block == Length::zero() &&
pb.block_end == Length::zero() &&
block_level_kind == BlockLevelKind::SameFormattingContextBlock;
matches!(block_level_kind, BlockLevelKind::SameFormattingContextBlock(_));
positioning_context.for_maybe_position_relative(layout_context, style, |positioning_context| {
let mut flow_layout = layout_contents(
positioning_context,
&containing_block_for_children,
this_start_margin_can_collapse_with_children,
);
let mut flow_layout = match block_level_kind {
BlockLevelKind::SameFormattingContextBlock(contents) => contents.layout(
layout_context,
positioning_context,
&containing_block_for_children,
tree_rank,
float_context,
this_start_margin_can_collapse_with_children,
),
BlockLevelKind::EstablishesAnIndependentFormattingContext(non_replaced) => {
let independent_layout = non_replaced.layout(
layout_context,
positioning_context,
&containing_block_for_children,
tree_rank,
);
FlowLayout {
fragments: independent_layout.fragments,
content_block_size: independent_layout.content_block_size,
collapsible_margins_in_children: CollapsedBlockMargins::zero(),
}
}
};
let mut block_margins_collapsed_with_children = CollapsedBlockMargins::from_margin(&margin);
if this_start_margin_can_collapse_with_children.0 {
block_margins_collapsed_with_children