mirror of
https://github.com/servo/servo.git
synced 2025-08-06 22:15:33 +01:00
Layout: Implement CSS Grid using taffy (#32619)
* Add layout.grid.enabled pref Signed-off-by: Nico Burns <nico@nicoburns.com> * Add taffy dependency Signed-off-by: Nico Burns <nico@nicoburns.com> * Import taffy <-> stylo conversion code from taffy_stylo crate Signed-off-by: Nico Burns <nico@nicoburns.com> * Add `Grid` variant to DisplayInside Signed-off-by: Nico Burns <nico@nicoburns.com> * Implement CSS Grid using Taffy Signed-off-by: Nico Burns <nico@nicoburns.com> Import full stylo_taffy crate Signed-off-by: Nico Burns <nico@nicoburns.com> Squashed PR feedback changes Deduplicate is_document_only_whitespace Signed-off-by: Nico Burns <nico@nicoburns.com> Import taffy::AvailableSpace Signed-off-by: Nico Burns <nico@nicoburns.com> Rename FlexContext to TaffyContainerContext Signed-off-by: Nico Burns <nico@nicoburns.com> Eliminate references to flexbox in taffy/layout module Signed-off-by: Nico Burns <nico@nicoburns.com> Use constructors for geom types Signed-off-by: Nico Burns <nico@nicoburns.com> Remove comment about abspos elements splitting contiguous text runs Signed-off-by: Nico Burns <nico@nicoburns.com> Remove reference to flexbox in taffy/construct Signed-off-by: Nico Burns <nico@nicoburns.com> Deduplicate construction of flexbox/grid containers Signed-off-by: Nico Burns <nico@nicoburns.com> Make anonymous text runs InFlow Signed-off-by: Nico Burns <nico@nicoburns.com> Remove commented code Signed-off-by: Nico Burns <nico@nicoburns.com> Update comments Signed-off-by: Nico Burns <nico@nicoburns.com> Inline/vendor the stylo/taffy interop code Signed-off-by: Nico Burns <nico@nicoburns.com> * Update test expectations Signed-off-by: Nico Burns <nico@nicoburns.com> * Fix nits from PR review Signed-off-by: Nico Burns <nico@nicoburns.com> --------- Signed-off-by: Nico Burns <nico@nicoburns.com>
This commit is contained in:
Nico Burns
GitHub
parent
339062c890
commit
6cbd89dbb0
508 changed files with 2057 additions and 10408 deletions
|
|
@ -1,237 +0,0 @@
|
|||
/* This Source Code Form is subject to the terms of the Mozilla Public
|
||||
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
|
||||
|
||||
use std::borrow::Cow;
|
||||
|
||||
use rayon::iter::{IntoParallelIterator, ParallelIterator};
|
||||
use style::values::specified::text::TextDecorationLine;
|
||||
|
||||
use super::{FlexContainer, FlexItemBox, FlexLevelBox};
|
||||
use crate::cell::ArcRefCell;
|
||||
use crate::context::LayoutContext;
|
||||
use crate::dom::{BoxSlot, LayoutBox, NodeExt};
|
||||
use crate::dom_traversal::{Contents, NodeAndStyleInfo, NonReplacedContents, TraversalHandler};
|
||||
use crate::flow::inline::construct::InlineFormattingContextBuilder;
|
||||
use crate::flow::{BlockContainer, BlockFormattingContext};
|
||||
use crate::formatting_contexts::{
|
||||
IndependentFormattingContext, NonReplacedFormattingContext,
|
||||
NonReplacedFormattingContextContents,
|
||||
};
|
||||
use crate::positioned::AbsolutelyPositionedBox;
|
||||
use crate::style_ext::DisplayGeneratingBox;
|
||||
|
||||
impl FlexContainer {
|
||||
pub fn construct<'dom>(
|
||||
context: &LayoutContext,
|
||||
info: &NodeAndStyleInfo<impl NodeExt<'dom>>,
|
||||
contents: NonReplacedContents,
|
||||
propagated_text_decoration_line: TextDecorationLine,
|
||||
) -> Self {
|
||||
let text_decoration_line =
|
||||
propagated_text_decoration_line | info.style.clone_text_decoration_line();
|
||||
let mut builder = FlexContainerBuilder {
|
||||
context,
|
||||
info,
|
||||
text_decoration_line,
|
||||
contiguous_text_runs: Vec::new(),
|
||||
jobs: Vec::new(),
|
||||
has_text_runs: false,
|
||||
};
|
||||
contents.traverse(context, info, &mut builder);
|
||||
builder.finish()
|
||||
}
|
||||
}
|
||||
|
||||
/// <https://drafts.csswg.org/css-flexbox/#flex-items>
|
||||
struct FlexContainerBuilder<'a, 'dom, Node> {
|
||||
context: &'a LayoutContext<'a>,
|
||||
info: &'a NodeAndStyleInfo<Node>,
|
||||
text_decoration_line: TextDecorationLine,
|
||||
contiguous_text_runs: Vec<FlexTextRun<'dom, Node>>,
|
||||
/// To be run in parallel with rayon in `finish`
|
||||
jobs: Vec<FlexLevelJob<'dom, Node>>,
|
||||
has_text_runs: bool,
|
||||
}
|
||||
|
||||
enum FlexLevelJob<'dom, Node> {
|
||||
/// Or pseudo-element
|
||||
Element {
|
||||
info: NodeAndStyleInfo<Node>,
|
||||
display: DisplayGeneratingBox,
|
||||
contents: Contents,
|
||||
box_slot: BoxSlot<'dom>,
|
||||
},
|
||||
TextRuns(Vec<FlexTextRun<'dom, Node>>),
|
||||
}
|
||||
|
||||
struct FlexTextRun<'dom, Node> {
|
||||
info: NodeAndStyleInfo<Node>,
|
||||
text: Cow<'dom, str>,
|
||||
}
|
||||
|
||||
impl<'a, 'dom, Node: 'dom> TraversalHandler<'dom, Node> for FlexContainerBuilder<'a, 'dom, Node>
|
||||
where
|
||||
Node: NodeExt<'dom>,
|
||||
{
|
||||
fn handle_text(&mut self, info: &NodeAndStyleInfo<Node>, text: Cow<'dom, str>) {
|
||||
self.contiguous_text_runs.push(FlexTextRun {
|
||||
info: info.clone(),
|
||||
text,
|
||||
})
|
||||
}
|
||||
|
||||
/// Or pseudo-element
|
||||
fn handle_element(
|
||||
&mut self,
|
||||
info: &NodeAndStyleInfo<Node>,
|
||||
display: DisplayGeneratingBox,
|
||||
contents: Contents,
|
||||
box_slot: BoxSlot<'dom>,
|
||||
) {
|
||||
// FIXME: are text runs considered "contiguous" if they are only separated
|
||||
// by an out-of-flow abspos element?
|
||||
// (That is, are they wrapped in the same anonymous flex item, or each its own?)
|
||||
self.wrap_any_text_in_anonymous_block_container();
|
||||
|
||||
self.jobs.push(FlexLevelJob::Element {
|
||||
info: info.clone(),
|
||||
display,
|
||||
contents,
|
||||
box_slot,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
/// <https://drafts.csswg.org/css-text/#white-space>
|
||||
fn is_only_document_white_space<Node>(run: &FlexTextRun<'_, Node>) -> bool {
|
||||
// FIXME: is this the right definition? See
|
||||
// https://github.com/w3c/csswg-drafts/issues/5146
|
||||
// https://github.com/w3c/csswg-drafts/issues/5147
|
||||
run.text
|
||||
.bytes()
|
||||
.all(|byte| matches!(byte, b' ' | b'\n' | b'\t'))
|
||||
}
|
||||
|
||||
impl<'a, 'dom, Node: 'dom> FlexContainerBuilder<'a, 'dom, Node>
|
||||
where
|
||||
Node: NodeExt<'dom>,
|
||||
{
|
||||
fn wrap_any_text_in_anonymous_block_container(&mut self) {
|
||||
let runs = std::mem::take(&mut self.contiguous_text_runs);
|
||||
if runs.iter().all(is_only_document_white_space) {
|
||||
// There is no text run, or they all only contain document white space characters
|
||||
} else {
|
||||
self.jobs.push(FlexLevelJob::TextRuns(runs));
|
||||
self.has_text_runs = true;
|
||||
}
|
||||
}
|
||||
|
||||
fn finish(mut self) -> FlexContainer {
|
||||
self.wrap_any_text_in_anonymous_block_container();
|
||||
|
||||
let anonymous_style = if self.has_text_runs {
|
||||
Some(
|
||||
self.context
|
||||
.shared_context()
|
||||
.stylist
|
||||
.style_for_anonymous::<Node::ConcreteElement>(
|
||||
&self.context.shared_context().guards,
|
||||
&style::selector_parser::PseudoElement::ServoAnonymousBox,
|
||||
&self.info.style,
|
||||
),
|
||||
)
|
||||
} else {
|
||||
None
|
||||
};
|
||||
|
||||
let mut children = std::mem::take(&mut self.jobs)
|
||||
.into_par_iter()
|
||||
.filter_map(|job| match job {
|
||||
FlexLevelJob::TextRuns(runs) => {
|
||||
let mut inline_formatting_context_builder =
|
||||
InlineFormattingContextBuilder::new();
|
||||
for flex_text_run in runs.into_iter() {
|
||||
inline_formatting_context_builder
|
||||
.push_text(flex_text_run.text, &flex_text_run.info);
|
||||
}
|
||||
|
||||
let inline_formatting_context = inline_formatting_context_builder.finish(
|
||||
self.context,
|
||||
self.text_decoration_line,
|
||||
true, /* has_first_formatted_line */
|
||||
false, /* is_single_line_text_box */
|
||||
self.info.style.writing_mode.to_bidi_level(),
|
||||
)?;
|
||||
|
||||
let block_formatting_context = BlockFormattingContext::from_block_container(
|
||||
BlockContainer::InlineFormattingContext(inline_formatting_context),
|
||||
);
|
||||
let info = &self.info.new_anonymous(anonymous_style.clone().unwrap());
|
||||
let non_replaced = NonReplacedFormattingContext {
|
||||
base_fragment_info: info.into(),
|
||||
style: info.style.clone(),
|
||||
content_sizes_result: Default::default(),
|
||||
contents: NonReplacedFormattingContextContents::Flow(
|
||||
block_formatting_context,
|
||||
),
|
||||
};
|
||||
|
||||
Some(ArcRefCell::new(FlexLevelBox::FlexItem(FlexItemBox {
|
||||
independent_formatting_context: IndependentFormattingContext::NonReplaced(
|
||||
non_replaced,
|
||||
),
|
||||
block_content_size_cache: Default::default(),
|
||||
})))
|
||||
},
|
||||
FlexLevelJob::Element {
|
||||
info,
|
||||
display,
|
||||
contents,
|
||||
box_slot,
|
||||
} => {
|
||||
let display_inside = match display {
|
||||
DisplayGeneratingBox::OutsideInside { inside, .. } => inside,
|
||||
DisplayGeneratingBox::LayoutInternal(_) => display.display_inside(),
|
||||
};
|
||||
let box_ = if info.style.get_box().position.is_absolutely_positioned() {
|
||||
// https://drafts.csswg.org/css-flexbox/#abspos-items
|
||||
ArcRefCell::new(FlexLevelBox::OutOfFlowAbsolutelyPositionedBox(
|
||||
ArcRefCell::new(AbsolutelyPositionedBox::construct(
|
||||
self.context,
|
||||
&info,
|
||||
display_inside,
|
||||
contents,
|
||||
)),
|
||||
))
|
||||
} else {
|
||||
ArcRefCell::new(FlexLevelBox::FlexItem(FlexItemBox {
|
||||
independent_formatting_context: IndependentFormattingContext::construct(
|
||||
self.context,
|
||||
&info,
|
||||
display_inside,
|
||||
contents,
|
||||
self.text_decoration_line,
|
||||
),
|
||||
block_content_size_cache: Default::default(),
|
||||
}))
|
||||
};
|
||||
box_slot.set(LayoutBox::FlexLevel(box_.clone()));
|
||||
Some(box_)
|
||||
},
|
||||
})
|
||||
.collect::<Vec<_>>();
|
||||
|
||||
// https://drafts.csswg.org/css-flexbox/#order-modified-document-order
|
||||
children.sort_by_key(|child| match &*child.borrow() {
|
||||
FlexLevelBox::FlexItem(item) => item.style().clone_order(),
|
||||
|
||||
// “Absolutely-positioned children of a flex container are treated
|
||||
// as having order: 0 for the purpose of determining their painting order
|
||||
// relative to flex items.”
|
||||
FlexLevelBox::OutOfFlowAbsolutelyPositionedBox(_) => 0,
|
||||
});
|
||||
|
||||
FlexContainer::new(&self.info.style, children)
|
||||
}
|
||||
}
|
||||
|
|
@ -13,13 +13,17 @@ use style::properties::longhands::flex_wrap::computed_value::T as FlexWrap;
|
|||
use style::properties::ComputedValues;
|
||||
use style::values::computed::{AlignContent, JustifyContent};
|
||||
use style::values::specified::align::AlignFlags;
|
||||
use style::values::specified::text::TextDecorationLine;
|
||||
|
||||
use crate::cell::ArcRefCell;
|
||||
use crate::construct_modern::{ModernContainerBuilder, ModernItemKind};
|
||||
use crate::context::LayoutContext;
|
||||
use crate::dom::{LayoutBox, NodeExt};
|
||||
use crate::dom_traversal::{NodeAndStyleInfo, NonReplacedContents};
|
||||
use crate::formatting_contexts::IndependentFormattingContext;
|
||||
use crate::fragment_tree::BaseFragmentInfo;
|
||||
use crate::positioned::AbsolutelyPositionedBox;
|
||||
|
||||
mod construct;
|
||||
mod geom;
|
||||
mod layout;
|
||||
|
||||
|
|
@ -95,14 +99,45 @@ pub(crate) struct FlexContainer {
|
|||
}
|
||||
|
||||
impl FlexContainer {
|
||||
pub(crate) fn new(
|
||||
style: &ServoArc<ComputedValues>,
|
||||
children: Vec<ArcRefCell<FlexLevelBox>>,
|
||||
pub fn construct<'dom>(
|
||||
context: &LayoutContext,
|
||||
info: &NodeAndStyleInfo<impl NodeExt<'dom>>,
|
||||
contents: NonReplacedContents,
|
||||
propagated_text_decoration_line: TextDecorationLine,
|
||||
) -> Self {
|
||||
let text_decoration_line =
|
||||
propagated_text_decoration_line | info.style.clone_text_decoration_line();
|
||||
|
||||
let mut builder = ModernContainerBuilder::new(context, info, text_decoration_line);
|
||||
contents.traverse(context, info, &mut builder);
|
||||
let items = builder.finish();
|
||||
|
||||
let children = items
|
||||
.into_iter()
|
||||
.map(|item| {
|
||||
let box_ = match item.kind {
|
||||
ModernItemKind::InFlow => ArcRefCell::new(FlexLevelBox::FlexItem(
|
||||
FlexItemBox::new(item.formatting_context),
|
||||
)),
|
||||
ModernItemKind::OutOfFlow => {
|
||||
let abs_pos_box =
|
||||
ArcRefCell::new(AbsolutelyPositionedBox::new(item.formatting_context));
|
||||
ArcRefCell::new(FlexLevelBox::OutOfFlowAbsolutelyPositionedBox(abs_pos_box))
|
||||
},
|
||||
};
|
||||
|
||||
if let Some(box_slot) = item.box_slot {
|
||||
box_slot.set(LayoutBox::FlexLevel(box_.clone()));
|
||||
}
|
||||
|
||||
box_
|
||||
})
|
||||
.collect();
|
||||
|
||||
Self {
|
||||
children,
|
||||
style: style.clone(),
|
||||
config: FlexContainerConfig::new(style),
|
||||
style: info.style.clone(),
|
||||
config: FlexContainerConfig::new(&info.style),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -127,6 +162,13 @@ impl std::fmt::Debug for FlexItemBox {
|
|||
}
|
||||
|
||||
impl FlexItemBox {
|
||||
fn new(independent_formatting_context: IndependentFormattingContext) -> Self {
|
||||
Self {
|
||||
independent_formatting_context,
|
||||
block_content_size_cache: Default::default(),
|
||||
}
|
||||
}
|
||||
|
||||
fn style(&self) -> &ServoArc<ComputedValues> {
|
||||
self.independent_formatting_context.style()
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue