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Struct with named fields over large tuple

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This commit is contained in:
Simon Sapin 2019-12-08 01:12:10 +01:00
parent be8df1d114
commit a17db217a1
1 changed files with 41 additions and 32 deletions
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73
components/layout_2020/positioned.rs
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@ -186,7 +186,7 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
let computed_margin = style.margin().percentages_relative_to(cbis);
let pb = &padding + &border;
let (inline_anchor, inline_size, margin_inline_start, margin_inline_end) = solve_axis(
let inline_axis = solve_axis(
cbis,
pb.inline_sum(),
computed_margin.inline_start,
@ -196,7 +196,7 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
size.inline,
);
let (block_anchor, block_size, margin_block_start, margin_block_end) = solve_axis(
let block_axis = solve_axis(
cbis,
pb.block_sum(),
computed_margin.block_start,
@ -207,10 +207,10 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
);
let margin = Sides {
inline_start: margin_inline_start,
inline_end: margin_inline_end,
block_start: margin_block_start,
block_end: margin_block_end,
inline_start: inline_axis.margin_start,
inline_end: inline_axis.margin_end,
block_start: block_axis.margin_start,
block_end: block_axis.margin_end,
};
let mut absolutely_positioned_fragments = Vec::new();
@ -226,8 +226,8 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
Err(non_replaced) => {
// https://drafts.csswg.org/css2/visudet.html#abs-non-replaced-width
// https://drafts.csswg.org/css2/visudet.html#abs-non-replaced-height
let inline_size = inline_size.auto_is(|| {
let available_size = match inline_anchor {
let inline_size = inline_axis.size.auto_is(|| {
let available_size = match inline_axis.anchor {
Anchor::Start(start) => {
cbis - start - pb.inline_sum() - margin.inline_sum()
},
@ -241,7 +241,7 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
let containing_block_for_children = ContainingBlock {
inline_size,
block_size,
block_size: block_axis.size,
style,
};
// https://drafts.csswg.org/css-writing-modes/#orthogonal-flows
@ -260,17 +260,19 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
let size = Vec2 {
inline: inline_size,
block: block_size.auto_is(|| independent_layout.content_block_size),
block: block_axis
.size
.auto_is(|| independent_layout.content_block_size),
};
(size, independent_layout.fragments)
},
};
let inline_start = match inline_anchor {
let inline_start = match inline_axis.anchor {
Anchor::Start(start) => start + pb.inline_start + margin.inline_start,
Anchor::End(end) => cbbs - end - pb.inline_end - margin.inline_end - size.inline,
};
let block_start = match block_anchor {
let block_start = match block_axis.anchor {
Anchor::Start(start) => start + pb.block_start + margin.block_start,
Anchor::End(end) => cbbs - end - pb.block_end - margin.block_end - size.block,
};
@ -309,6 +311,13 @@ enum Anchor {
End(Length),
}
struct AxisResult {
anchor: Anchor,
size: LengthOrAuto,
margin_start: Length,
margin_end: Length,
}
/// This unifies some of the parts in common in:
///
/// * https://drafts.csswg.org/css2/visudet.html#abs-non-replaced-width
@ -328,26 +337,26 @@ fn solve_axis(
avoid_negative_margin_start: bool,
box_offsets: AbsoluteBoxOffsets,
size: LengthOrAuto,
) -> (Anchor, LengthOrAuto, Length, Length) {
) -> AxisResult {
match box_offsets {
AbsoluteBoxOffsets::StaticStart { start } => (
Anchor::Start(start),
AbsoluteBoxOffsets::StaticStart { start } => AxisResult {
anchor: Anchor::Start(start),
size,
computed_margin_start.auto_is(Length::zero),
computed_margin_end.auto_is(Length::zero),
),
AbsoluteBoxOffsets::Start { start } => (
Anchor::Start(start.percentage_relative_to(containing_size)),
margin_start: computed_margin_start.auto_is(Length::zero),
margin_end: computed_margin_end.auto_is(Length::zero),
},
AbsoluteBoxOffsets::Start { start } => AxisResult {
anchor: Anchor::Start(start.percentage_relative_to(containing_size)),
size,
computed_margin_start.auto_is(Length::zero),
computed_margin_end.auto_is(Length::zero),
),
AbsoluteBoxOffsets::End { end } => (
Anchor::End(end.percentage_relative_to(containing_size)),
margin_start: computed_margin_start.auto_is(Length::zero),
margin_end: computed_margin_end.auto_is(Length::zero),
},
AbsoluteBoxOffsets::End { end } => AxisResult {
anchor: Anchor::End(end.percentage_relative_to(containing_size)),
size,
computed_margin_start.auto_is(Length::zero),
computed_margin_end.auto_is(Length::zero),
),
margin_start: computed_margin_start.auto_is(Length::zero),
margin_end: computed_margin_end.auto_is(Length::zero),
},
AbsoluteBoxOffsets::Both { start, end } => {
let start = start.percentage_relative_to(containing_size);
let end = end.percentage_relative_to(containing_size);
@ -391,12 +400,12 @@ fn solve_axis(
used_size =
containing_size - start - end - padding_border_sum - margin_start - margin_end
};
(
Anchor::Start(start),
LengthOrAuto::LengthPercentage(used_size),
AxisResult {
anchor: Anchor::Start(start),
size: LengthOrAuto::LengthPercentage(used_size),
margin_start,
margin_end,
)
}
},
}
}