Struct layout_2020::display_list::DisplayListBuilder

pub(crate) struct DisplayListBuilder<'a> {
    current_scroll_node_id: ScrollTreeNodeId,
    current_reference_frame_scroll_node_id: ScrollTreeNodeId,
    current_clip_chain_id: ClipChainId,
    element_for_canvas_background: OpaqueNode,
    pub context: &'a LayoutContext<'a>,
    pub display_list: &'a mut DisplayList,
    is_contentful: bool,
}

Fields

current_scroll_node_id: ScrollTreeNodeId

The current ScrollTreeNodeId for this DisplayListBuilder. This allows only passing the builder instead passing the containing stacking_context::StackingContextContent::Fragment as an argument to display list building functions.

current_reference_frame_scroll_node_id: ScrollTreeNodeId

The current ScrollTreeNodeId for this DisplayListBuilder. This is necessary in addition to the Self::current_scroll_node_id, because some pieces of fragments as backgrounds with background-attachment: fixed need to not scroll while the rest of the fragment does.

current_clip_chain_id: ClipChainId

The current wr::ClipId for this DisplayListBuilder. This allows only passing the builder instead passing the containing stacking_context::StackingContextContent::Fragment as an argument to display list building functions.

element_for_canvas_background: OpaqueNode

The OpaqueNode handle to the node used to paint the page background if the background was a canvas.

context: &'a LayoutContext<'a>

A LayoutContext used to get information about the device pixel ratio and get handles to WebRender images.

display_list: &'a mut DisplayList

The DisplayList used to collect display list items and metadata.

is_contentful: bool

Contentful paint i.e. whether the display list contains items of type text, image, non-white canvas or SVG). Used by metrics. See https://w3c.github.io/paint-timing/#first-contentful-paint.

Implementations

impl<'a> DisplayListBuilder<'a>

fn wr(&mut self) -> &mut DisplayListBuilder

fn common_properties( &self, clip_rect: LayoutRect, style: &ComputedValues, ) -> CommonItemProperties

fn hit_info( &mut self, style: &ComputedValues, tag: Option<Tag>, auto_cursor: Cursor, ) -> Option<(u64, u16)>