Enum LineSpacing 

pub enum LineSpacing {
    OneFifteen,
    OneHalf,
    Double,
}

How far apart a block’s lines are set, as a multiple of the theme’s own line height — the spacing menu every word processor has, less the single spacing that is absence.

The tokens are the numbers rather than names (loose, double) so that a stylesheet’s line is line-height: 1.5 and a reader of the source sees the ratio. 1 is not a token, because 1 is absence and a document should not carry a key that says nothing.

Variants

OneFifteen

1.15 — the word processor’s default “a little more air”.

OneHalf

1.5.

Double

2 — double spacing.

Implementations

impl LineSpacing

pub const ALL: [Self; 3]

Every spacing, in the order a menu offers them. Single is absent for the reason left is absent from Align::ALL.

pub fn from_attrs(attrs: &[(String, Option<String>)]) -> Option<Self>

The spacing a block’s attributes name, if any — twig records it under data-line-height.

pub fn from_attr(value: &str) -> Option<Self>

Read a data-line-height value. None for a ratio outside the vocabulary — a document carrying data-line-height="1.3" keeps the key and draws at the theme’s spacing, rather than having leaf guess a step.

pub const fn name(self) -> &'static str

The token twig spells it with, and what from_attr reads back.

pub const fn ratio(self) -> f32

The ratio itself — what a frontend multiplies the theme’s line height by to lay the row out. A derived number, not a carried one: the document says 1.5, and this is that name read as arithmetic.

pub const fn index(self) -> usize

This spacing’s position in ALL — the index a frontend’s own menu is keyed by.

Trait Implementations

impl Clone for LineSpacing

fn clone(&self) -> LineSpacing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LineSpacing

impl Debug for LineSpacing

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

Formats the value using the given formatter.

impl Eq for LineSpacing

impl PartialEq for LineSpacing

fn eq(&self, other: &LineSpacing) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LineSpacing