[−][src]Trait dialect::Theme

pub trait Theme {
    fn default_style(&self) -> ResolvedStyle;
    fn style(&self, group: HighlightGroup) -> Style;
}

A trait for defining syntax highlighting themes.

Required methods

`fn default_style(&self) -> ResolvedStyle`

The style for unhighlighted text. To understand why this must be a fully resolved style, consider the following example:

default_style returns a Style which omits a foreground colour - at some point a highlighter returns a HighlightedSpan without a highlight group
when render is called, what is the foreground colour of this unhighlighted HighlightedSpan?

To prevent situations like this, default_style acts as a fallback for all cases by forcing the implementor to define all of the style’s fields.

`fn style(&self, group: HighlightGroup) -> Style`

Provides a mapping from HighlightGroups to Styles. As HighlightGroups contain a variant for unhighlighted text, this thereby defines the appearance of the whole text field.

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