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858bc5aca6
The result of doing the layout of an independent formatting context should be unconcerned with margin collapsing.
83 lines
2.4 KiB
Rust
83 lines
2.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#![allow(dead_code)]
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#![allow(unreachable_code)]
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#![allow(unused_imports)]
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#![allow(unused_variables)]
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#![deny(unsafe_code)]
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#![feature(exact_size_is_empty)]
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#[macro_use]
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extern crate serde;
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pub mod context;
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pub mod data;
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pub mod display_list;
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mod dom_traversal;
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mod element_data;
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mod flow;
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mod formatting_contexts;
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mod fragments;
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mod geom;
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mod opaque_node;
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mod positioned;
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pub mod query;
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mod replaced;
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mod style_ext;
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pub mod traversal;
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pub mod wrapper;
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pub use flow::{BoxTreeRoot, FragmentTreeRoot};
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use crate::context::LayoutContext;
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use crate::dom_traversal::{Contents, NodeExt};
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use crate::flow::BlockFormattingContext;
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use crate::geom::flow_relative::Vec2;
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use crate::positioned::AbsolutelyPositionedFragment;
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use crate::replaced::ReplacedContent;
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use crate::style_ext::{ComputedValuesExt, Direction, DisplayInside, Position, WritingMode};
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use servo_arc::Arc;
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use std::convert::TryInto;
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use style::properties::ComputedValues;
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use style::values::computed::{Length, LengthOrAuto};
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use style::Zero;
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struct ContainingBlock {
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inline_size: Length,
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block_size: LengthOrAuto,
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mode: (WritingMode, Direction),
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}
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struct DefiniteContainingBlock {
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size: Vec2<Length>,
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mode: (WritingMode, Direction),
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}
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/// https://drafts.csswg.org/css2/visuren.html#relative-positioning
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fn relative_adjustement(
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style: &ComputedValues,
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inline_size: Length,
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block_size: LengthOrAuto,
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) -> Vec2<Length> {
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if style.get_box().position != Position::Relative {
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return Vec2::zero();
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}
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fn adjust(start: LengthOrAuto, end: LengthOrAuto) -> Length {
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match (start, end) {
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(LengthOrAuto::Auto, LengthOrAuto::Auto) => Length::zero(),
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(LengthOrAuto::Auto, LengthOrAuto::LengthPercentage(end)) => -end,
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(LengthOrAuto::LengthPercentage(start), _) => start,
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}
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}
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let block_size = block_size.auto_is(Length::zero);
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let box_offsets = style.box_offsets().map_inline_and_block_axes(
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|v| v.percentage_relative_to(inline_size),
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|v| v.percentage_relative_to(block_size),
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);
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Vec2 {
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inline: adjust(box_offsets.inline_start, box_offsets.inline_end),
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block: adjust(box_offsets.block_start, box_offsets.block_end),
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}
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}
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