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Diffstat (limited to 'components/layout/lib.rs')
| -rw-r--r-- | components/layout/lib.rs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/components/layout/lib.rs b/components/layout/lib.rs index af7d432c4d8..cd992387277 100644 --- a/components/layout/lib.rs +++ b/components/layout/lib.rs @@ -38,6 +38,7 @@ pub use flow::BoxTree; pub use fragment_tree::FragmentTree; pub use layout_impl::LayoutFactoryImpl; use malloc_size_of_derive::MallocSizeOf; +use servo_arc::Arc as ServoArc; use style::logical_geometry::WritingMode; use style::properties::ComputedValues; use style::values::computed::TextDecorationLine; @@ -45,6 +46,16 @@ use style::values::computed::TextDecorationLine; use crate::geom::{LogicalVec2, SizeConstraint}; use crate::style_ext::AspectRatio; +/// At times, a style is "owned" by more than one layout object. For example, text +/// fragments need a handle on their parent inline box's style. In order to make +/// incremental layout easier to implement, another layer of shared ownership is added via +/// [`SharedStyle`]. This allows updating the style in originating layout object and +/// having all "depdendent" objects update automatically. +/// +/// Note that this is not a cost-free data structure, so should only be +/// used when necessary. +pub(crate) type SharedStyle = ArcRefCell<ServoArc<ComputedValues>>; + /// Represents the set of constraints that we use when computing the min-content /// and max-content inline sizes of an element. pub(crate) struct ConstraintSpace { |