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a0dd2c1beb
`TextRun`s use their parent style to render. Previously, these styles were cloned and stored directly in the box tree `TextRun` and resulting `TextFragment`s. This presents a problem for incremental layout. Wrapping the style in another layer of shared ownership and mutability will allow updating all `TextFragment`s during repaint-only incremental layout by simply updating the box tree styles of the original text parents. This adds a new set of borrows when accessing text styles, but also makes it so that during box tree block construction `InlineFormattingContext`s are created lazily and now `InlineFormattingContextBuilder::finish` consumes the builder, making the API make a bit more sense. This should also improve performance of box tree block construction slightly. Testing: This should not change observable behavior and thus is covered by existing WPT tests. Signed-off-by: Martin Robinson <mrobinson@igalia.com> Co-authored-by: Oriol Brufau <obrufau@igalia.com>
94 lines
3.3 KiB
Rust
94 lines
3.3 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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use app_units::Au;
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use base::print_tree::PrintTree;
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use malloc_size_of_derive::MallocSizeOf;
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use servo_arc::Arc as ServoArc;
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use style::properties::ComputedValues;
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use super::{BaseFragment, BaseFragmentInfo, Fragment};
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use crate::cell::ArcRefCell;
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use crate::geom::PhysicalRect;
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/// Can contain child fragments with relative coordinates, but does not contribute to painting
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/// itself. [`PositioningFragment`]s may be completely anonymous, or just non-painting Fragments
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/// generated by boxes.
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#[derive(MallocSizeOf)]
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pub(crate) struct PositioningFragment {
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pub base: BaseFragment,
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pub rect: PhysicalRect<Au>,
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pub children: Vec<Fragment>,
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/// The scrollable overflow of this anonymous fragment's children.
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pub scrollable_overflow: PhysicalRect<Au>,
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/// If this fragment was created with a style, the style of the fragment.
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pub style: Option<ServoArc<ComputedValues>>,
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/// This [`PositioningFragment`]'s containing block rectangle in coordinates relative to
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/// the initial containing block, but not taking into account any transforms.
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pub cumulative_containing_block_rect: PhysicalRect<Au>,
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}
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impl PositioningFragment {
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pub fn new_anonymous(rect: PhysicalRect<Au>, children: Vec<Fragment>) -> ArcRefCell<Self> {
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Self::new_with_base_fragment(BaseFragment::anonymous(), None, rect, children)
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}
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pub fn new_empty(
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base_fragment_info: BaseFragmentInfo,
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rect: PhysicalRect<Au>,
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style: ServoArc<ComputedValues>,
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) -> ArcRefCell<Self> {
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Self::new_with_base_fragment(base_fragment_info.into(), Some(style), rect, Vec::new())
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}
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fn new_with_base_fragment(
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base: BaseFragment,
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style: Option<ServoArc<ComputedValues>>,
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rect: PhysicalRect<Au>,
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children: Vec<Fragment>,
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) -> ArcRefCell<Self> {
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let content_origin = rect.origin;
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let scrollable_overflow = children.iter().fold(PhysicalRect::zero(), |acc, child| {
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acc.union(
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&child
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.scrollable_overflow_for_parent()
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.translate(content_origin.to_vector()),
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)
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});
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ArcRefCell::new(PositioningFragment {
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base,
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style,
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rect,
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children,
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scrollable_overflow,
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cumulative_containing_block_rect: PhysicalRect::zero(),
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})
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}
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pub(crate) fn set_containing_block(&mut self, containing_block: &PhysicalRect<Au>) {
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self.cumulative_containing_block_rect = *containing_block;
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}
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pub fn offset_by_containing_block(&self, rect: &PhysicalRect<Au>) -> PhysicalRect<Au> {
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rect.translate(self.cumulative_containing_block_rect.origin.to_vector())
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}
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pub fn print(&self, tree: &mut PrintTree) {
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tree.new_level(format!(
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"PositioningFragment\
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\nbase={:?}\
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\nrect={:?}\
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\nscrollable_overflow={:?}",
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self.base, self.rect, self.scrollable_overflow
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));
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for child in &self.children {
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child.print(tree);
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}
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tree.end_level();
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}
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}
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