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Auto merge of #26079 - servo:box-sizing, r=nox

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Implement the `box-sizing` property
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bors-servo 2020-04-01 07:49:08 -04:00 • committed by GitHub
commit 5926577534
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134 changed files with 3964 additions and 274 deletions
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71
components/layout_2020/flow/inline.rs
View file

@ -206,7 +206,7 @@ impl InlineFormattingContext {
}
}
fn add_lengthpercentage(&mut self, lp: LengthPercentage) {
fn add_lengthpercentage(&mut self, lp: &LengthPercentage) {
if let Some(l) = lp.to_length() {
self.add_length(l);
}
@ -421,13 +421,11 @@ impl InlineBox {
ifc: &mut InlineFormattingContextState<'box_tree, '_, '_>,
) -> PartialInlineBoxFragment<'box_tree> {
let style = self.style.clone();
let cbis = ifc.containing_block.inline_size;
let mut padding = style.padding().percentages_relative_to(cbis);
let mut border = style.border_width();
let mut margin = style
.margin()
.percentages_relative_to(cbis)
.auto_is(Length::zero);
let pbm = style.padding_border_margin(&ifc.containing_block);
let mut padding = pbm.padding;
let mut border = pbm.border;
let mut margin = pbm.margin.auto_is(Length::zero);
if self.first_fragment {
ifc.inline_position += padding.inline_start + border.inline_start + margin.inline_start;
} else {
@ -530,18 +528,12 @@ fn layout_atomic(
ifc: &mut InlineFormattingContextState,
atomic: &IndependentFormattingContext,
) {
let cbis = ifc.containing_block.inline_size;
let padding = atomic.style.padding().percentages_relative_to(cbis);
let border = atomic.style.border_width();
let margin = atomic
.style
.margin()
.percentages_relative_to(cbis)
.auto_is(Length::zero);
let pbm = &(&padding + &border) + &margin;
ifc.inline_position += pbm.inline_start;
let pbm = atomic.style.padding_border_margin(&ifc.containing_block);
let margin = pbm.margin.auto_is(Length::zero);
let pbm_sums = &(&pbm.padding + &pbm.border) + &margin;
ifc.inline_position += pbm_sums.inline_start;
let mut start_corner = Vec2 {
block: pbm.block_start,
block: pbm_sums.block_start,
inline: ifc.inline_position - ifc.current_nesting_level.inline_start,
};
if atomic.style.clone_position().is_relative() {
@ -550,7 +542,8 @@ fn layout_atomic(
let fragment = match atomic.as_replaced() {
Ok(replaced) => {
let size = replaced.used_size_as_if_inline_element(ifc.containing_block, &atomic.style);
let size =
replaced.used_size_as_if_inline_element(ifc.containing_block, &atomic.style, &pbm);
let fragments = replaced.make_fragments(&atomic.style, size.clone());
let content_rect = Rect { start_corner, size };
BoxFragment::new(
@ -558,30 +551,27 @@ fn layout_atomic(
atomic.style.clone(),
fragments,
content_rect,
padding,
border,
pbm.padding,
pbm.border,
margin,
CollapsedBlockMargins::zero(),
)
},
Err(non_replaced) => {
let box_size = atomic.style.box_size();
let box_size = atomic.style.content_box_size(&ifc.containing_block, &pbm);
let max_box_size = atomic
.style
.max_box_size()
.percentages_relative_to(ifc.containing_block);
.content_max_box_size(&ifc.containing_block, &pbm);
let min_box_size = atomic
.style
.min_box_size()
.percentages_relative_to(ifc.containing_block)
.content_min_box_size(&ifc.containing_block, &pbm)
.auto_is(Length::zero);
// https://drafts.csswg.org/css2/visudet.html#inlineblock-width
let tentative_inline_size =
box_size.inline.percentage_relative_to(cbis).auto_is(|| {
let available_size = cbis - pbm.inline_sum();
atomic.content_sizes.shrink_to_fit(available_size)
});
let tentative_inline_size = box_size.inline.auto_is(|| {
let available_size = ifc.containing_block.inline_size - pbm_sums.inline_sum();
atomic.content_sizes.shrink_to_fit(available_size)
});
// https://drafts.csswg.org/css2/visudet.html#min-max-widths
// In this case “applying the rules above again” with a non-auto inline-size
@ -589,12 +579,9 @@ fn layout_atomic(
let inline_size = tentative_inline_size
.clamp_between_extremums(min_box_size.inline, max_box_size.inline);
let block_size = box_size
.block
.maybe_percentage_relative_to(ifc.containing_block.block_size.non_auto());
let containing_block_for_children = ContainingBlock {
inline_size,
block_size,
block_size: box_size.block,
style: &atomic.style,
};
assert_eq!(
@ -613,7 +600,9 @@ fn layout_atomic(
);
// https://drafts.csswg.org/css2/visudet.html#block-root-margin
let tentative_block_size = block_size.auto_is(|| independent_layout.content_block_size);
let tentative_block_size = box_size
.block
.auto_is(|| independent_layout.content_block_size);
// https://drafts.csswg.org/css2/visudet.html#min-max-heights
// In this case “applying the rules above again” with a non-auto block-size
@ -633,18 +622,18 @@ fn layout_atomic(
atomic.style.clone(),
independent_layout.fragments,
content_rect,
padding,
border,
pbm.padding,
pbm.border,
margin,
CollapsedBlockMargins::zero(),
)
},
};
ifc.inline_position += pbm.inline_end + fragment.content_rect.size.inline;
ifc.inline_position += pbm_sums.inline_end + fragment.content_rect.size.inline;
ifc.current_nesting_level
.max_block_size_of_fragments_so_far
.max_assign(pbm.block_sum() + fragment.content_rect.size.block);
.max_assign(pbm_sums.block_sum() + fragment.content_rect.size.block);
ifc.current_nesting_level
.fragments_so_far
.push(Fragment::Box(fragment));

109
components/layout_2020/flow/mod.rs
View file

@ -14,7 +14,7 @@ use crate::fragments::{CollapsedBlockMargins, CollapsedMargin, Fragment};
use crate::geom::flow_relative::{Rect, Sides, Vec2};
use crate::positioned::{AbsolutelyPositionedBox, PositioningContext};
use crate::replaced::ReplacedContent;
use crate::style_ext::ComputedValuesExt;
use crate::style_ext::{ComputedValuesExt, PaddingBorderMargin};
use crate::ContainingBlock;
use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator};
use rayon_croissant::ParallelIteratorExt;
@ -350,40 +350,27 @@ fn layout_in_flow_non_replaced_block_level(
tree_rank: usize,
float_context: Option<&mut FloatContext>,
) -> BoxFragment {
let cbis = containing_block.inline_size;
let padding = style.padding().percentages_relative_to(cbis);
let border = style.border_width();
let margin = style.margin().percentages_relative_to(cbis);
let pb = &padding + &border;
let pb_inline_sum = pb.inline_sum();
let box_size = style.box_size().percentages_relative_to(containing_block);
let max_box_size = style
.max_box_size()
.percentages_relative_to(containing_block);
let pbm = style.padding_border_margin(containing_block);
let box_size = style.content_box_size(containing_block, &pbm);
let max_box_size = style.content_max_box_size(containing_block, &pbm);
let min_box_size = style
.min_box_size()
.percentages_relative_to(containing_block)
.content_min_box_size(containing_block, &pbm)
.auto_is(Length::zero);
// https://drafts.csswg.org/css2/visudet.html#min-max-widths
let solve_inline_margins = |inline_size| {
solve_inline_margins_for_in_flow_block_level(
containing_block,
pb_inline_sum,
margin.inline_start,
margin.inline_end,
inline_size,
)
solve_inline_margins_for_in_flow_block_level(containing_block, &pbm, inline_size)
};
let (mut inline_size, mut inline_margins) =
if let Some(inline_size) = box_size.inline.non_auto() {
(inline_size, solve_inline_margins(inline_size))
} else {
let margin_inline_start = margin.inline_start.auto_is(Length::zero);
let margin_inline_end = margin.inline_end.auto_is(Length::zero);
let margin_inline_sum = margin_inline_start + margin_inline_end;
let inline_size = cbis - pb_inline_sum - margin_inline_sum;
let margin_inline_start = pbm.margin.inline_start.auto_is(Length::zero);
let margin_inline_end = pbm.margin.inline_end.auto_is(Length::zero);
let inline_size = containing_block.inline_size -
pbm.padding_border_sums.inline -
margin_inline_start -
margin_inline_end;
(inline_size, (margin_inline_start, margin_inline_end))
};
if let Some(max_inline_size) = max_box_size.inline {
@ -400,8 +387,8 @@ fn layout_in_flow_non_replaced_block_level(
let margin = Sides {
inline_start: inline_margins.0,
inline_end: inline_margins.1,
block_start: margin.block_start.auto_is(Length::zero),
block_end: margin.block_end.auto_is(Length::zero),
block_start: pbm.margin.block_start.auto_is(Length::zero),
block_end: pbm.margin.block_end.auto_is(Length::zero),
};
// https://drafts.csswg.org/css2/visudet.html#min-max-heights
@ -427,8 +414,10 @@ fn layout_in_flow_non_replaced_block_level(
let mut content_block_size;
match block_level_kind {
NonReplacedContents::SameFormattingContextBlock(contents) => {
let this_start_margin_can_collapse_with_children = pb.block_start == Length::zero();
let this_end_margin_can_collapse_with_children = pb.block_end == Length::zero() &&
let start_margin_can_collapse_with_children = pbm.padding.block_start == Length::zero() &&
pbm.border.block_start == Length::zero();
let end_margin_can_collapse_with_children = pbm.padding.block_end == Length::zero() &&
pbm.border.block_end == Length::zero() &&
block_size == LengthOrAuto::Auto &&
min_box_size.block == Length::zero();
@ -438,13 +427,13 @@ fn layout_in_flow_non_replaced_block_level(
&containing_block_for_children,
tree_rank,
float_context,
CollapsibleWithParentStartMargin(this_start_margin_can_collapse_with_children),
CollapsibleWithParentStartMargin(start_margin_can_collapse_with_children),
);
fragments = flow_layout.fragments;
content_block_size = flow_layout.content_block_size;
let mut collapsible_margins_in_children = flow_layout.collapsible_margins_in_children;
if this_start_margin_can_collapse_with_children {
if start_margin_can_collapse_with_children {
block_margins_collapsed_with_children
.start
.adjoin_assign(&collapsible_margins_in_children.start);
@ -457,7 +446,7 @@ fn layout_in_flow_non_replaced_block_level(
));
}
}
if this_end_margin_can_collapse_with_children {
if end_margin_can_collapse_with_children {
block_margins_collapsed_with_children
.end
.adjoin_assign(&collapsible_margins_in_children.end);
@ -465,8 +454,8 @@ fn layout_in_flow_non_replaced_block_level(
content_block_size += collapsible_margins_in_children.end.solve();
}
block_margins_collapsed_with_children.collapsed_through =
this_start_margin_can_collapse_with_children &&
this_end_margin_can_collapse_with_children &&
start_margin_can_collapse_with_children &&
end_margin_can_collapse_with_children &&
collapsible_margins_in_children.collapsed_through;
},
NonReplacedContents::EstablishesAnIndependentFormattingContext(non_replaced) => {
@ -485,8 +474,8 @@ fn layout_in_flow_non_replaced_block_level(
});
let content_rect = Rect {
start_corner: Vec2 {
block: pb.block_start,
inline: pb.inline_start + margin.inline_start,
block: pbm.padding.block_start + pbm.border.block_start,
inline: pbm.padding.inline_start + pbm.border.inline_start + margin.inline_start,
},
size: Vec2 {
block: block_size,
@ -498,8 +487,8 @@ fn layout_in_flow_non_replaced_block_level(
style.clone(),
fragments,
content_rect,
padding,
border,
pbm.padding,
pbm.border,
margin,
block_margins_collapsed_with_children,
)
@ -514,32 +503,22 @@ fn layout_in_flow_replaced_block_level<'a>(
style: &Arc<ComputedValues>,
replaced: &ReplacedContent,
) -> BoxFragment {
let size = replaced.used_size_as_if_inline_element(containing_block, style);
let pbm = style.padding_border_margin(containing_block);
let size = replaced.used_size_as_if_inline_element(containing_block, style, &pbm);
let cbis = containing_block.inline_size;
let padding = style.padding().percentages_relative_to(cbis);
let border = style.border_width();
let computed_margin = style.margin().percentages_relative_to(cbis);
let pb = &padding + &border;
let (margin_inline_start, margin_inline_end) = solve_inline_margins_for_in_flow_block_level(
containing_block,
pb.inline_sum(),
computed_margin.inline_start,
computed_margin.inline_end,
size.inline,
);
let (margin_inline_start, margin_inline_end) =
solve_inline_margins_for_in_flow_block_level(containing_block, &pbm, size.inline);
let margin = Sides {
inline_start: margin_inline_start,
inline_end: margin_inline_end,
block_start: computed_margin.block_start.auto_is(Length::zero),
block_end: computed_margin.block_end.auto_is(Length::zero),
block_start: pbm.margin.block_start.auto_is(Length::zero),
block_end: pbm.margin.block_end.auto_is(Length::zero),
};
let fragments = replaced.make_fragments(style, size.clone());
let content_rect = Rect {
start_corner: Vec2 {
block: pb.block_start,
inline: pb.inline_start + margin.inline_start,
block: pbm.padding.block_start + pbm.border.block_start,
inline: pbm.padding.inline_start + pbm.border.inline_start + margin.inline_start,
},
size,
};
@ -549,8 +528,8 @@ fn layout_in_flow_replaced_block_level<'a>(
style.clone(),
fragments,
content_rect,
padding,
border,
pbm.padding,
pbm.border,
margin,
block_margins_collapsed_with_children,
)
@ -558,15 +537,13 @@ fn layout_in_flow_replaced_block_level<'a>(
fn solve_inline_margins_for_in_flow_block_level(
containing_block: &ContainingBlock,
padding_border_inline_sum: Length,
computed_margin_inline_start: LengthOrAuto,
computed_margin_inline_end: LengthOrAuto,
pbm: &PaddingBorderMargin,
inline_size: Length,
) -> (Length, Length) {
let inline_margins = containing_block.inline_size - padding_border_inline_sum - inline_size;
match (computed_margin_inline_start, computed_margin_inline_end) {
(LengthOrAuto::Auto, LengthOrAuto::Auto) => (inline_margins / 2., inline_margins / 2.),
(LengthOrAuto::Auto, LengthOrAuto::LengthPercentage(end)) => (inline_margins - end, end),
(LengthOrAuto::LengthPercentage(start), _) => (start, inline_margins - start),
let available = containing_block.inline_size - pbm.padding_border_sums.inline - inline_size;
match (pbm.margin.inline_start, pbm.margin.inline_end) {
(LengthOrAuto::Auto, LengthOrAuto::Auto) => (available / 2., available / 2.),
(LengthOrAuto::Auto, LengthOrAuto::LengthPercentage(end)) => (available - end, end),
(LengthOrAuto::LengthPercentage(start), _) => (start, available - start),
}
}