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Use a new BoxContentSizes enum instead of Option<ContentSizes>

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This commit is contained in:
Simon Sapin 2019-12-04 15:36:05 +01:00
parent 38e8fd1e99
commit dd9dfc66e3
5 changed files with 103 additions and 96 deletions
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31
components/layout_2020/flow/construct.rs
View file

@ -10,7 +10,7 @@ use crate::flow::inline::{InlineBox, InlineFormattingContext, InlineLevelBox, Te
use crate::flow::{BlockContainer, BlockFormattingContext, BlockLevelBox};
use crate::formatting_contexts::IndependentFormattingContext;
use crate::positioned::AbsolutelyPositionedBox;
use crate::sizing::{outer_inline_content_sizes, ContentSizes, ContentSizesRequest};
use crate::sizing::{BoxContentSizes, ContentSizes, ContentSizesRequest};
use crate::style_ext::{ComputedValuesExt, DisplayGeneratingBox, DisplayInside, DisplayOutside};
use rayon::iter::{IntoParallelIterator, ParallelIterator};
use rayon_croissant::ParallelIteratorExt;
@ -25,7 +25,7 @@ impl BlockFormattingContext {
style: &Arc<ComputedValues>,
contents: NonReplacedContents<impl NodeExt<'dom>>,
content_sizes: ContentSizesRequest,
) -> (Self, Option<ContentSizes>) {
) -> (Self, BoxContentSizes) {
let (contents, contains_floats, inline_content_sizes) =
BlockContainer::construct(context, style, contents, content_sizes);
// FIXME: add contribution to `inline_content_sizes` of floats in this formatting context
@ -134,7 +134,7 @@ impl BlockContainer {
block_container_style: &Arc<ComputedValues>,
contents: NonReplacedContents<impl NodeExt<'dom>>,
content_sizes: ContentSizesRequest,
) -> (BlockContainer, ContainsFloats, Option<ContentSizes>) {
) -> (BlockContainer, ContainsFloats, BoxContentSizes) {
let mut builder = BlockContainerBuilder {
context,
block_container_style,
@ -155,7 +155,7 @@ impl BlockContainer {
.is_empty()
{
if builder.block_level_boxes.is_empty() {
let inline_content_sizes = content_sizes.if_requests_inline(|| {
let content_sizes = content_sizes.compute(|| {
builder
.ongoing_inline_formatting_context
.inline_content_sizes(context)
@ -163,7 +163,7 @@ impl BlockContainer {
let container = BlockContainer::InlineFormattingContext(
builder.ongoing_inline_formatting_context,
);
return (container, builder.contains_floats, inline_content_sizes);
return (container, builder.contains_floats, content_sizes);
}
builder.end_ongoing_inline_formatting_context();
}
@ -212,9 +212,8 @@ impl BlockContainer {
contains_floats,
outer_content_sizes_of_children,
} = target;
let inline_content_sizes =
content_sizes.if_requests_inline(|| outer_content_sizes_of_children);
(container, contains_floats, inline_content_sizes)
let content_sizes = content_sizes.compute(|| outer_content_sizes_of_children);
(container, contains_floats, content_sizes)
}
}
@ -586,7 +585,7 @@ where
) -> (Arc<BlockLevelBox>, ContainsFloats) {
match self {
IntermediateBlockLevelBox::SameFormattingContextBlock { style, contents } => {
let (contents, contains_floats, inline_content_sizes) = contents.finish(
let (contents, contains_floats, box_content_sizes) = contents.finish(
context,
&style,
ContentSizesRequest::inline_if(
@ -595,7 +594,7 @@ where
),
);
if let Some(to) = max_assign_in_flow_outer_content_sizes_to {
to.max_assign(&outer_inline_content_sizes(&style, &inline_content_sizes))
to.max_assign(&box_content_sizes.outer_inline(&style))
}
let block_level_box =
Arc::new(BlockLevelBox::SameFormattingContextBlock { contents, style });
@ -618,10 +617,7 @@ where
content_sizes,
);
if let Some(to) = max_assign_in_flow_outer_content_sizes_to {
to.max_assign(&outer_inline_content_sizes(
&contents.style,
&contents.inline_content_sizes,
))
to.max_assign(&contents.content_sizes.outer_inline(&contents.style))
}
(
Arc::new(BlockLevelBox::Independent(contents)),
@ -661,21 +657,20 @@ where
context: &LayoutContext,
style: &Arc<ComputedValues>,
content_sizes: ContentSizesRequest,
) -> (BlockContainer, ContainsFloats, Option<ContentSizes>) {
) -> (BlockContainer, ContainsFloats, BoxContentSizes) {
match self {
IntermediateBlockContainer::Deferred { contents } => {
BlockContainer::construct(context, style, contents, content_sizes)
},
IntermediateBlockContainer::InlineFormattingContext(ifc) => {
let inline_content_sizes =
content_sizes.if_requests_inline(|| ifc.inline_content_sizes(context));
let content_sizes = content_sizes.compute(|| ifc.inline_content_sizes(context));
// If that inline formatting context contained any float, those
// were already taken into account during the first phase of
// box construction.
(
BlockContainer::InlineFormattingContext(ifc),
ContainsFloats::No,
inline_content_sizes,
content_sizes,
)
},
}

11
components/layout_2020/flow/inline.rs
View file

@ -10,7 +10,7 @@ use crate::fragments::CollapsedBlockMargins;
use crate::fragments::{AnonymousFragment, BoxFragment, Fragment, TextFragment};
use crate::geom::flow_relative::{Rect, Sides, Vec2};
use crate::positioned::{AbsolutelyPositionedBox, AbsolutelyPositionedFragment};
use crate::sizing::{outer_inline_content_sizes_and_percentages, shrink_to_fit, ContentSizes};
use crate::sizing::ContentSizes;
use crate::style_ext::{ComputedValuesExt, Display, DisplayGeneratingBox, DisplayOutside};
use crate::{relative_adjustement, ContainingBlock};
use app_units::Au;
@ -139,10 +139,9 @@ impl InlineFormattingContext {
}
},
InlineLevelBox::Atomic(atomic) => {
let (outer, pc) = outer_inline_content_sizes_and_percentages(
&atomic.style,
&atomic.inline_content_sizes,
);
let (outer, pc) = atomic
.content_sizes
.outer_inline_and_percentages(&atomic.style);
self.current_line.min_content += outer.min_content;
self.current_line.max_content += outer.max_content;
self.current_line_percentages += pc;
@ -439,7 +438,7 @@ fn layout_atomic<'box_tree>(
let box_size = atomic.style.box_size();
let inline_size = box_size.inline.percentage_relative_to(cbis).auto_is(|| {
let available_size = cbis - pbm.inline_sum();
shrink_to_fit(&atomic.inline_content_sizes, available_size)
atomic.content_sizes.shrink_to_fit(available_size)
});
let block_size = box_size
.block

19
components/layout_2020/formatting_contexts.rs
View file

@ -8,7 +8,7 @@ use crate::flow::BlockFormattingContext;
use crate::fragments::Fragment;
use crate::positioned::AbsolutelyPositionedFragment;
use crate::replaced::ReplacedContent;
use crate::sizing::{ContentSizes, ContentSizesRequest};
use crate::sizing::{BoxContentSizes, ContentSizesRequest};
use crate::style_ext::DisplayInside;
use crate::ContainingBlock;
use servo_arc::Arc;
@ -22,7 +22,7 @@ pub(crate) struct IndependentFormattingContext {
pub style: Arc<ComputedValues>,
/// If it was requested during construction
pub inline_content_sizes: Option<ContentSizes>,
pub content_sizes: BoxContentSizes,
contents: IndependentFormattingContextContents,
}
@ -58,27 +58,30 @@ impl IndependentFormattingContext {
content_sizes: ContentSizesRequest,
) -> Self {
use self::IndependentFormattingContextContents as Contents;
let (contents, inline_content_sizes) = match contents.try_into() {
let (contents, content_sizes) = match contents.try_into() {
Ok(non_replaced) => match display_inside {
DisplayInside::Flow | DisplayInside::FlowRoot => {
let (bfc, inline_content_sizes) = BlockFormattingContext::construct(
let (bfc, box_content_sizes) = BlockFormattingContext::construct(
context,
&style,
non_replaced,
content_sizes,
);
(Contents::Flow(bfc), inline_content_sizes)
(Contents::Flow(bfc), box_content_sizes)
},
},
Err(replaced) => {
let inline_content_sizes = None; // Unused by layout code
(Contents::Replaced(replaced), inline_content_sizes)
// The `content_sizes` field is not used by layout code:
(
Contents::Replaced(replaced),
BoxContentSizes::NoneWereRequested,
)
},
};
Self {
style,
contents,
inline_content_sizes,
content_sizes,
}
}

10
components/layout_2020/positioned.rs
View file

@ -7,7 +7,7 @@ use crate::dom_traversal::{Contents, NodeExt};
use crate::formatting_contexts::IndependentFormattingContext;
use crate::fragments::{AnonymousFragment, BoxFragment, CollapsedBlockMargins, Fragment};
use crate::geom::flow_relative::{Rect, Sides, Vec2};
use crate::sizing::{shrink_to_fit, ContentSizesRequest};
use crate::sizing::ContentSizesRequest;
use crate::style_ext::{ComputedValuesExt, Direction, DisplayInside, WritingMode};
use crate::{ContainingBlock, DefiniteContainingBlock};
use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
@ -295,10 +295,10 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
// FIXME: implement https://drafts.csswg.org/css2/visudet.html#abs-replaced-width
available_size
} else {
shrink_to_fit(
&self.absolutely_positioned_box.contents.inline_content_sizes,
available_size,
)
self.absolutely_positioned_box
.contents
.content_sizes
.shrink_to_fit(available_size)
}
});

128
components/layout_2020/sizing.rs
View file

@ -38,6 +38,13 @@ impl ContentSizesRequest {
Self::None => None,
}
}
pub fn compute(self, compute_inline: impl FnOnce() -> ContentSizes) -> BoxContentSizes {
match self {
Self::Inline => BoxContentSizes::Inline(compute_inline()),
Self::None => BoxContentSizes::NoneWereRequested,
}
}
}
#[derive(Clone, Debug)]
@ -74,69 +81,72 @@ impl ContentSizes {
}
}
/// https://dbaron.org/css/intrinsic/#outer-intrinsic
pub(crate) fn outer_inline_content_sizes(
style: &ComputedValues,
inner_content_sizes: &Option<ContentSizes>,
) -> ContentSizes {
let (mut outer, percentages) =
outer_inline_content_sizes_and_percentages(style, inner_content_sizes);
outer.adjust_for_pbm_percentages(percentages);
outer
/// Optional min/max-content for storage in the box tree
#[derive(Debug)]
pub(crate) enum BoxContentSizes {
NoneWereRequested, // … during box construction
Inline(ContentSizes),
}
pub(crate) fn outer_inline_content_sizes_and_percentages(
style: &ComputedValues,
inner_content_sizes: &Option<ContentSizes>,
) -> (ContentSizes, Percentage) {
// FIXME: account for 'min-width', 'max-width', 'box-sizing'
impl BoxContentSizes {
fn expect_inline(&self) -> &ContentSizes {
match self {
Self::NoneWereRequested => panic!("Accessing content size that was not requested"),
Self::Inline(s) => s,
}
}
let inline_size = style.box_size().inline;
// Percentages for 'width' are treated as 'auto'
let inline_size = inline_size.map(|lp| lp.as_length());
// The (inner) min/max-content are only used for 'auto'
let mut outer = match inline_size.non_auto().flatten() {
None => expect(inner_content_sizes).clone(),
Some(length) => ContentSizes {
min_content: length,
max_content: length,
},
};
/// https://dbaron.org/css/intrinsic/#outer-intrinsic
pub fn outer_inline(&self, style: &ComputedValues) -> ContentSizes {
let (mut outer, percentages) = self.outer_inline_and_percentages(style);
outer.adjust_for_pbm_percentages(percentages);
outer
}
let mut pbm_lengths = Length::zero();
let mut pbm_percentages = Percentage::zero();
let padding = style.padding();
let border = style.border_width();
let margin = style.margin();
pbm_lengths += border.inline_sum();
let mut add = |x: LengthPercentage| {
pbm_lengths += x.length_component();
pbm_percentages += x.percentage_component();
};
add(padding.inline_start);
add(padding.inline_end);
margin.inline_start.non_auto().map(&mut add);
margin.inline_end.non_auto().map(&mut add);
pub(crate) fn outer_inline_and_percentages(
&self,
style: &ComputedValues,
) -> (ContentSizes, Percentage) {
// FIXME: account for 'min-width', 'max-width', 'box-sizing'
outer.min_content += pbm_lengths;
outer.max_content += pbm_lengths;
let inline_size = style.box_size().inline;
// Percentages for 'width' are treated as 'auto'
let inline_size = inline_size.map(|lp| lp.as_length());
// The (inner) min/max-content are only used for 'auto'
let mut outer = match inline_size.non_auto().flatten() {
None => self.expect_inline().clone(),
Some(length) => ContentSizes {
min_content: length,
max_content: length,
},
};
(outer, pbm_percentages)
}
/// https://drafts.csswg.org/css2/visudet.html#shrink-to-fit-float
pub(crate) fn shrink_to_fit(
content_sizes: &Option<ContentSizes>,
available_size: Length,
) -> Length {
let content_sizes = expect(content_sizes);
available_size
.max(content_sizes.min_content)
.min(content_sizes.max_content)
}
fn expect(content_sizes: &Option<ContentSizes>) -> &ContentSizes {
content_sizes
.as_ref()
.expect("Accessing content size that was not requested")
let mut pbm_lengths = Length::zero();
let mut pbm_percentages = Percentage::zero();
let padding = style.padding();
let border = style.border_width();
let margin = style.margin();
pbm_lengths += border.inline_sum();
let mut add = |x: LengthPercentage| {
pbm_lengths += x.length_component();
pbm_percentages += x.percentage_component();
};
add(padding.inline_start);
add(padding.inline_end);
margin.inline_start.non_auto().map(&mut add);
margin.inline_end.non_auto().map(&mut add);
outer.min_content += pbm_lengths;
outer.max_content += pbm_lengths;
(outer, pbm_percentages)
}
/// https://drafts.csswg.org/css2/visudet.html#shrink-to-fit-float
pub(crate) fn shrink_to_fit(&self, available_size: Length) -> Length {
let inline = self.expect_inline();
available_size
.max(inline.min_content)
.min(inline.max_content)
}
}