Struct layout_2020::flow::inline::BaselineRelativeSize

struct BaselineRelativeSize {
    ascent: Au,
    descent: Au,
}

A block size relative to a line’s final baseline. This is to track the size contribution of a particular element of a line above and below the baseline. These sizes can be combined with other baseline relative sizes before the final baseline position is known. The values here are relative to the overall line’s baseline and not the nested baseline of an inline box.

Fields

ascent: Au

The ascent above the baseline, where a positive value means a larger ascent. Thus, the top of this size contribution is baseline_offset - ascent.

descent: Au

The descent below the baseline, where a positive value means a larger descent. Thus, the bottom of this size contribution is baseline_offset + descent.

Implementations

impl BaselineRelativeSize

fn zero() -> Self

fn max(&self, other: &Self) -> Self

fn adjust_for_nested_baseline_offset(&mut self, baseline_offset: Au)

Given an offset from the line’s root baseline, adjust this BaselineRelativeSize by that offset. This is used to adjust a BaselineRelativeSize for different kinds of baseline-relative vertical-align. This will “move” measured size of a particular inline box’s block size. For example, in the following HTML:

    <div>
        <span style="vertical-align: 5px">child content</span>
    </div>

If this BaselineRelativeSize is for the <span> then the adjustment passed here would be equivalent to -5px.

Trait Implementations

impl Clone for BaselineRelativeSize

fn clone(&self) -> BaselineRelativeSize

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BaselineRelativeSize

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

Formats the value using the given formatter.