Struct LayoutBoxBase

pub(crate) struct LayoutBoxBase {
    pub base_fragment_info: BaseFragmentInfo,
    pub style: Arc<ComputedValues>,
    pub cached_inline_content_size: AtomicRefCell<Option<Box<(SizeConstraint, InlineContentSizesResult)>>>,
    pub cached_layout_result: AtomicRefCell<Option<Box<CacheableLayoutResultAndInputs>>>,
    pub fragments: AtomicRefCell<Vec<Fragment>>,
}

A box tree node that handles containing information about style and the original DOM node or pseudo-element that it is based on. This also handles caching of layout values such as the inline content sizes to avoid recalculating these values during layout passes.

In the future, this will hold layout results to support incremental layout.

Fields

base_fragment_info: BaseFragmentInfo

style: Arc<ComputedValues>

cached_inline_content_size: AtomicRefCell<Option<Box<(SizeConstraint, InlineContentSizesResult)>>>

cached_layout_result: AtomicRefCell<Option<Box<CacheableLayoutResultAndInputs>>>

fragments: AtomicRefCell<Vec<Fragment>>

Implementations

impl LayoutBoxBase

pub(crate) fn new( base_fragment_info: BaseFragmentInfo, style: Arc<ComputedValues>, ) -> Self

pub(crate) fn inline_content_sizes( &self, layout_context: &LayoutContext<'_>, constraint_space: &ConstraintSpace, layout_box: &impl ComputeInlineContentSizes, ) -> InlineContentSizesResult

Get the inline content sizes of a box tree node that extends this LayoutBoxBase, fetch the result from a cache when possible.

pub(crate) fn clear_fragment_layout_cache(&self)

Clear cached data accumulated during fragment tree layout, either fragments and the cached inline content size, or just fragments.

pub(crate) fn fragments(&self) -> Vec<Fragment>

pub(crate) fn add_fragment(&self, fragment: Fragment)

pub(crate) fn set_fragment(&self, fragment: Fragment)

pub(crate) fn clear_fragments(&self)

pub(crate) fn repair_style(&mut self, new_style: &Arc<ComputedValues>)

Trait Implementations

impl Debug for LayoutBoxBase

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl MallocSizeOf for LayoutBoxBase

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.