Trait FormattableTextDyn

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pub trait FormattableTextDyn: Debug {
    // Required methods
    fn clone_boxed(&self) -> Box<dyn FormattableTextDyn>;
    fn str_len(&self) -> usize;
    fn as_str(&self) -> &str;
    fn font_tokens(&self, dpem: f32) -> OwningVecIter<FontToken> ⓘ;
    fn effect_tokens(&self) -> &[Effect<()>];
}

Expand description

Text, optionally with formatting data

This is an object-safe version of the FormattableText trait (i.e. dyn FormattableTextDyn is a valid type).

This trait is auto-implemented for every implementation of FormattableText. The type &dyn FormattableTextDyn implements FormattableText. Implement either this or (preferably) FormattableText, not both.

Required Methods§

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fn clone_boxed(&self) -> Box<dyn FormattableTextDyn>

Produce a boxed clone of self

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fn str_len(&self) -> usize

Length of text

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fn as_str(&self) -> &str

Access whole text as contiguous str

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fn font_tokens(&self, dpem: f32) -> OwningVecIter<FontToken> ⓘ

Construct an iterator over formatting items

It is expected that FontToken::start of yielded items is strictly increasing; if not, formatting may not be applied correctly.

The default font size (dpem) is passed as a reference.

For plain text this iterator will be empty.

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fn effect_tokens(&self) -> &[Effect<()>]

Get the sequence of effect tokens

This method has some limitations: (1) it may only return a reference to an existing sequence, (2) effect tokens cannot be generated dependent on input state, and (3) it does not incorporate color information. For most uses it should still be sufficient, but for other cases it may be preferable not to use this method (use a dummy implementation returning &[] and use inherent methods on the text object via Text::text).