cosmic::iced_futures::core::text::highlighter

Trait Highlighter

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pub trait Highlighter: 'static {
    type Settings: PartialEq + Clone;
    type Highlight;
    type Iterator<'a>: Iterator<Item = (Range<usize>, Self::Highlight)>
       where Self: 'a;

    // Required methods
    fn new(settings: &Self::Settings) -> Self;
    fn update(&mut self, new_settings: &Self::Settings);
    fn change_line(&mut self, line: usize);
    fn highlight_line(&mut self, line: &str) -> Self::Iterator<'_>;
    fn current_line(&self) -> usize;
}
Expand description

A type capable of highlighting text.

A Highlighter highlights lines in sequence. When a line changes, it must be notified and the lines after the changed one must be fed again to the Highlighter.

Required Associated Types§

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type Settings: PartialEq + Clone

The settings to configure the Highlighter.

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type Highlight

The output of the Highlighter.

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type Iterator<'a>: Iterator<Item = (Range<usize>, Self::Highlight)> where Self: 'a

The highlight iterator type.

Required Methods§

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fn new(settings: &Self::Settings) -> Self

Creates a new Highlighter from its Self::Settings.

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fn update(&mut self, new_settings: &Self::Settings)

Updates the Highlighter with some new Self::Settings.

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fn change_line(&mut self, line: usize)

Notifies the Highlighter that the line at the given index has changed.

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fn highlight_line(&mut self, line: &str) -> Self::Iterator<'_>

Highlights the given line.

If a line changed prior to this, the first line provided here will be the line that changed.

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fn current_line(&self) -> usize

Returns the current line of the Highlighter.

If change_line has been called, this will normally be the least index that changed.

Object Safety§

This trait is not object safe.

Implementors§