Enum Gesture 

#[non_exhaustive]
pub enum Gesture {
    WrapRange(InlineKind),
    ToggleInline(InlineKind),
    SetBlock,
    ToggleBlockContainer(BlockContainerKind),
    InsertThematicBreak,
    ToggleCodeBlock,
    SetCodeLanguage,
    ToggleTaskItem,
    SetTaskChecked,
    ToggleTaskChecked,
    InsertLink,
    InsertImage,
    InsertFootnote,
    InsertLiteral,
    InsertLineBreak,
}

One authoring gesture, named with whatever kind it takes — the question Format::supports answers.

Twig’s formats are ragged: Djot spells all eight inline marks and Markdown three, HTML spells marks and nothing block-level, XML and AsciiDoc spell nothing. Every Editor method already reports that as Error::UnsupportedFormat — but only once called, which is too late for a UI that wants to disable the button rather than let it fail.

A variant carries a kind exactly where the Editor method takes one, so the query is spelled with the same value as the call:

if Format::Markdown.supports(Gesture::ToggleInline(InlineKind::Mark)) {
    // never runs: `==mark==` is emit-only in Markdown.
}

Only the gestures with a format-level gate appear. Three are absent for two different reasons:

• Editor::split_block consults the format only for the block it lands in (a fence inside a code block, a heading marker inside a heading, nothing at all in a paragraph). Its answer is a property of the caret, so no format-only query could be honest about it.
• Editor::renumber_ordered_lists and the table ops read no format spelling at all — they rewrite structure already in the source and refuse on position, never on format.

#[non_exhaustive] for the reason Format is: the gesture list grows with the editor surface, and a caller matching on this should not need a rebuild.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

WrapRange(InlineKind)

ToggleInline(InlineKind)

SetBlock

ToggleBlockContainer(BlockContainerKind)

InsertThematicBreak

ToggleCodeBlock

SetCodeLanguage

ToggleTaskItem

SetTaskChecked

ToggleTaskChecked

InsertLink

InsertImage

InsertFootnote

InsertLiteral

InsertLineBreak

Trait Implementations

impl Clone for Gesture

fn clone(&self) -> Gesture

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Gesture

impl Debug for Gesture

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

Formats the value using the given formatter.

impl Eq for Gesture

impl PartialEq for Gesture

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Gesture