Enum FontSize 

pub enum FontSize {
    Step(SizeStep),
    Points(Hundredths),
}

How large a run is set: a SizeStep relative to the text around it, or the point size the author asked for.

The step is what a menu offers first, and is what a document should say where a name will do — it reads as a step up under every theme. The point size is what the author typed and is all it is: 14 points of the sheet on the paginated view, and 14 points before the zoom on screen, which is how every other point size on a page behaves. A heading set to an exact size is that size and not its ramp scaled — the name scales the ramp, the value replaces it.

Only pt is a unit. px is a screen’s unit and a document is not a screen; em, rem and % are relative, which is what the steps already are.

Variants

Step(SizeStep)

Points(Hundredths)

Implementations

impl FontSize

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

The size a run’s or block’s attributes name, if any — twig records it under data-size.

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

Read a data-size value: one of CSS’s seven keywords, or a <number>pt. The unit is matched without regard to case, because a hand-written document says 14PT as readily as 14pt and CSS reads both.

pub fn points(points: f32) -> Option<Self>

A size in points, or None for a number this vocabulary cannot carry — the constructor an Other… field calls with what the author typed.

pub fn name(self) -> Cow<'static, str>

The token twig spells it with, and what from_attr reads back: the step’s CSS keyword, or the shortest decimal with pt after it.

pub const fn step(self) -> Option<SizeStep>

The step, for a menu asking which of its seven rows to tick — None when the size is an exact one, which the menu shows as its own row.

pub fn points_value(self) -> Option<f32>

The point size, or None when the size is a step — whose size in points is the theme’s business and not this type’s.

Trait Implementations

impl Clone for FontSize

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FontSize

impl Debug for FontSize

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

Formats the value using the given formatter.

impl Eq for FontSize

impl PartialEq for FontSize

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FontSize