Enum EventModifier 

pub enum EventModifier {
    Behaviour(Behaviour),
    Key(KeyName),
    System(SystemKey),
}

What an on-<event>.<modifier> qualifier asks for. Every tier reads a handler’s modifiers through this type; the words themselves live only in the tables below.

Variants

Behaviour(Behaviour)

How the browser treats the event once a listener has it.

Key(KeyName)

The one key a keyboard handler answers.

System(SystemKey)

A modifier key that must be held while the event happens.

Implementations

impl EventModifier

pub fn classify(word: &str) -> Option<EventModifier>

Classify one qualifier word, or None when the catalogue does not know it.

Named qualifiers match case-insensitively, as HTML attribute names do. Any other single printable character is the key of that character.

pub fn word(&self) -> String

The qualifier as it is written after the ..

pub fn key_of(modifiers: &[EventModifier]) -> Option<String>

The key a handler with these modifiers waits for, as a browser reports it — None for a handler that answers every key.

pub fn host_listen_bits(modifiers: &[EventModifier]) -> u8

The bits a host’s listen registration carries for these modifiers (Behaviour::listen_bit) — every behaviour a host dispatches by. .once is not among them: a host never retires a listener on its own, and the lowering keeps .once as compiled LOGOS.

pub fn every_word() -> impl Iterator<Item = &'static str>

Every qualifier the catalogue names, for a did-you-mean.

Trait Implementations

impl Clone for EventModifier

fn clone(&self) -> EventModifier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventModifier

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

Formats the value using the given formatter.

impl PartialEq for EventModifier

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for EventModifier

impl Eq for EventModifier

impl StructuralPartialEq for EventModifier