chromata 1.0.0

//! Plotters charting library integration.
//!
//! Provides [`From<Color>`](crate::Color) for [`plotters::style::RGBColor`] and a
//! convenience method on [`Theme`](crate::Theme).
//!
//! # Enable
//!
//! ```toml
//! [dependencies]
//! chromata = { version = "1", features = ["plotters-integration"] }
//! ```
//!
//! # Example
//!
//! ```rust,ignore
//! use chromata::popular::gruvbox;
//!
//! let theme = gruvbox::DARK_HARD;
//! let bg: plotters::style::RGBColor = theme.bg.into();
//! ```
//!
//! # Convenience
//!
//! ```rust,ignore
//! let series_colors = theme.to_plotters_series_colors();
//! // Vec of accent RGBColors for chart series
//! ```

use alloc::vec::Vec;

use crate::{Color, Theme};

/// Convert a chromata Color to a plotters RGBColor.
impl From<Color> for ::plotters::style::RGBColor {
    fn from(c: Color) -> Self {
        ::plotters::style::RGBColor(c.r, c.g, c.b)
    }
}

impl Theme {
    /// Return accent colors as plotters RGBColors for chart series.
    ///
    /// Collects defined accent colors (red, orange, yellow, green, cyan,
    /// blue, purple, magenta) in palette order, skipping any that are `None`.
    #[must_use]
    pub fn to_plotters_series_colors(&self) -> Vec<::plotters::style::RGBColor> {
        let accents = [
            self.red,
            self.orange,
            self.yellow,
            self.green,
            self.cyan,
            self.blue,
            self.purple,
            self.magenta,
        ];
        accents
            .iter()
            .filter_map(|c| c.map(::plotters::style::RGBColor::from))
            .collect()
    }
}