mirror of
https://github.com/servo/servo.git
synced 2025-06-13 02:44:29 +00:00
117 lines
3.7 KiB
Rust
117 lines
3.7 KiB
Rust
/* 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 crate::context::LayoutContext;
|
|
use crate::dom_traversal::{Contents, NodeExt};
|
|
use crate::flow::BlockFormattingContext;
|
|
use crate::fragments::Fragment;
|
|
use crate::positioned::PositioningContext;
|
|
use crate::replaced::ReplacedContent;
|
|
use crate::sizing::{BoxContentSizes, ContentSizesRequest};
|
|
use crate::style_ext::DisplayInside;
|
|
use crate::ContainingBlock;
|
|
use servo_arc::Arc;
|
|
use std::convert::TryInto;
|
|
use style::properties::ComputedValues;
|
|
use style::values::computed::Length;
|
|
|
|
/// https://drafts.csswg.org/css-display/#independent-formatting-context
|
|
#[derive(Debug)]
|
|
pub(crate) struct IndependentFormattingContext {
|
|
pub style: Arc<ComputedValues>,
|
|
|
|
/// If it was requested during construction
|
|
pub content_sizes: BoxContentSizes,
|
|
|
|
contents: IndependentFormattingContextContents,
|
|
}
|
|
|
|
pub(crate) struct IndependentLayout {
|
|
pub fragments: Vec<Fragment>,
|
|
|
|
/// https://drafts.csswg.org/css2/visudet.html#root-height
|
|
pub content_block_size: Length,
|
|
}
|
|
|
|
// Private so that code outside of this module cannot match variants.
|
|
// It should got through methods instead.
|
|
#[derive(Debug)]
|
|
enum IndependentFormattingContextContents {
|
|
Flow(BlockFormattingContext),
|
|
|
|
// Not called FC in specs, but behaves close enough
|
|
Replaced(ReplacedContent),
|
|
// Other layout modes go here
|
|
}
|
|
|
|
pub(crate) struct NonReplacedIFC<'a>(NonReplacedIFCKind<'a>);
|
|
|
|
enum NonReplacedIFCKind<'a> {
|
|
Flow(&'a BlockFormattingContext),
|
|
}
|
|
|
|
impl IndependentFormattingContext {
|
|
pub fn construct<'dom>(
|
|
context: &LayoutContext,
|
|
style: Arc<ComputedValues>,
|
|
display_inside: DisplayInside,
|
|
contents: Contents<impl NodeExt<'dom>>,
|
|
content_sizes: ContentSizesRequest,
|
|
) -> Self {
|
|
match contents.try_into() {
|
|
Ok(non_replaced) => match display_inside {
|
|
DisplayInside::Flow | DisplayInside::FlowRoot => {
|
|
let (bfc, content_sizes) = BlockFormattingContext::construct(
|
|
context,
|
|
&style,
|
|
non_replaced,
|
|
content_sizes,
|
|
);
|
|
Self {
|
|
style,
|
|
content_sizes,
|
|
contents: IndependentFormattingContextContents::Flow(bfc),
|
|
}
|
|
},
|
|
},
|
|
Err(replaced) => {
|
|
let content_sizes = content_sizes.compute(|| replaced.inline_content_sizes(&style));
|
|
Self {
|
|
style,
|
|
content_sizes,
|
|
contents: IndependentFormattingContextContents::Replaced(replaced),
|
|
}
|
|
},
|
|
}
|
|
}
|
|
|
|
pub fn as_replaced(&self) -> Result<&ReplacedContent, NonReplacedIFC> {
|
|
use self::IndependentFormattingContextContents as Contents;
|
|
use self::NonReplacedIFC as NR;
|
|
use self::NonReplacedIFCKind as Kind;
|
|
match &self.contents {
|
|
Contents::Replaced(r) => Ok(r),
|
|
Contents::Flow(f) => Err(NR(Kind::Flow(f))),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> NonReplacedIFC<'a> {
|
|
pub fn layout(
|
|
&self,
|
|
layout_context: &LayoutContext,
|
|
positioning_context: &mut PositioningContext<'a>,
|
|
containing_block: &ContainingBlock,
|
|
tree_rank: usize,
|
|
) -> IndependentLayout {
|
|
match &self.0 {
|
|
NonReplacedIFCKind::Flow(bfc) => bfc.layout(
|
|
layout_context,
|
|
positioning_context,
|
|
containing_block,
|
|
tree_rank,
|
|
),
|
|
}
|
|
}
|
|
}
|