Struct PositioningFragment 

pub(crate) struct PositioningFragment {
    pub base: BaseFragment,
    pub children: Vec<Fragment>,
    scrollable_overflow: AtomicRefCell<Option<PhysicalRect<Au>>>,
    pub cumulative_containing_block_rect: AtomicRefCell<PhysicalRect<Au>>,
}

Can contain child fragments with relative coordinates, but does not contribute to painting itself. PositioningFragments may be completely anonymous, or just non-painting Fragments generated by boxes.

Fields

base: BaseFragment

children: Vec<Fragment>

scrollable_overflow: AtomicRefCell<Option<PhysicalRect<Au>>>

The scrollable overflow of this anonymous fragment’s children.

cumulative_containing_block_rect: AtomicRefCell<PhysicalRect<Au>>

This PositioningFragment’s containing block rectangle in coordinates relative to the initial containing block, but not taking into account any transforms.

Implementations

impl PositioningFragment

fn build_stacking_context_tree( &self, stacking_context_tree: &mut StackingContextTree, containing_block: &ContainingBlock, containing_block_info: &ContainingBlockManager<'_, ContainingBlock>, stacking_context: &mut StackingContext, text_decorations: &Arc<Vec<FragmentTextDecoration>>, )

impl PositioningFragment

pub fn new_anonymous( style: ServoArc<ComputedValues>, rect: PhysicalRect<Au>, children: Vec<Fragment>, ) -> Arc<Self>

pub fn new_empty( base_fragment_info: BaseFragmentInfo, rect: PhysicalRect<Au>, style: ServoArc<ComputedValues>, ) -> Arc<Self>

fn new_with_base_fragment_info( base_fragment_info: BaseFragmentInfo, style: ServoArc<ComputedValues>, rect: PhysicalRect<Au>, children: Vec<Fragment>, ) -> Arc<Self>

pub(crate) fn set_containing_block(&self, containing_block: &PhysicalRect<Au>)

pub fn offset_by_containing_block( &self, rect: &PhysicalRect<Au>, containing_block_computation: ContainingBlockCalculation<'_>, ) -> PhysicalRect<Au>

pub(crate) fn scrollable_overflow_for_parent(&self) -> PhysicalRect<Au>

Get the scrollable overflow for this PositioningFragment relative to its containing block, recalculating scrollable overflow when necessary, for instance after a style change.

pub(crate) fn clear_scrollable_overflow(&self)

Clear the scrollable overflow on this PositioningFragment. This is called during damage propagation when a fragment is preserved, itself or one of its descendants has scrollable overflow damage.

fn calculate_scrollable_overflow(&self) -> PhysicalRect<Au>

pub fn print(&self, tree: &mut PrintTree)

Trait Implementations

impl MallocSizeOf for PositioningFragment

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.