Struct ContainingBlock 

pub(crate) struct ContainingBlock {
    scroll_node_id: ScrollTreeNodeId,
    scroll_frame_size: Option<LayoutSize>,
    clip_id: ClipId,
    rect: PhysicalRect<Au>,
    accumulated_reference_frame_offset: PhysicalVec<Au>,
    established_scroll_frame: bool,
}

Fields

scroll_node_id: ScrollTreeNodeId

The SpatialId of the spatial node that contains the children of this containing block.

scroll_frame_size: Option<LayoutSize>

The size of the parent scroll frame of this containing block, used for resolving sticky margins. If this is None, then this is a direct descendant of a reference frame and sticky positioning isn’t taken into account.

clip_id: ClipId

The ClipId to use for the children of this containing block.

rect: PhysicalRect<Au>

The physical rect of this containing block.

accumulated_reference_frame_offset: PhysicalVec<Au>

Normally containing block offsets and display list items are positioned relative to their parent reference frame, but cumulative containing block boundaries on fragments need to disregard reference frames entirely. This value tracks the accumulated offset from the origin of the parent reference frame of this containing block.

established_scroll_frame: bool

Whether current containing block established a scroll frame.

Implementations

impl ContainingBlock

pub(crate) fn new( rect: PhysicalRect<Au>, scroll_node_id: ScrollTreeNodeId, scroll_frame_size: Option<LayoutSize>, clip_id: ClipId, accumulated_reference_frame_offset: PhysicalVec<Au>, established_scroll_frame: bool, ) -> Self

pub(crate) fn new_replacing_rect(&self, rect: &PhysicalRect<Au>) -> Self

Trait Implementations

impl Clone for ContainingBlock

fn clone(&self) -> ContainingBlock

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.