chromata 1.0.0

1000+ editor color themes as compile-time Rust constants
Documentation 
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use core::ops::ControlFlow;

use crate::{Contrast, Theme, Variant};
use alloc::vec::Vec;

/// Iterate all themes from enabled feature modules, with early-return support.
///
/// Calls `f` once for each theme across all enabled collections. Return
/// `ControlFlow::Break(value)` from the closure to stop iteration early.
#[allow(unused_variables, unused_mut)]
fn for_each_theme<B>(mut f: impl FnMut(&'static Theme) -> ControlFlow<B>) -> ControlFlow<B> {
    #[cfg(feature = "popular")]
    for theme in crate::popular::THEMES {
        f(theme)?;
    }

    #[cfg(feature = "base16")]
    for theme in crate::base16::THEMES {
        f(theme)?;
    }

    #[cfg(feature = "base24")]
    for theme in crate::base24::THEMES {
        f(theme)?;
    }

    #[cfg(feature = "vim")]
    for theme in crate::vim::THEMES {
        f(theme)?;
    }

    #[cfg(feature = "emacs")]
    for theme in crate::emacs::THEMES {
        f(theme)?;
    }

    ControlFlow::Continue(())
}

/// Collect all themes from enabled feature modules into a Vec.
///
/// Aggregates themes from every enabled feature flag (`popular`, `base16`,
/// `base24`, `vim`, `emacs`). For zero-allocation access to a specific
/// collection, use the module-level `THEMES` slices directly
/// (e.g., `chromata::popular::THEMES`).
///
/// # Examples
///
/// ```
/// let all = chromata::collect_all_themes();
/// assert!(!all.is_empty());
/// ```
pub fn collect_all_themes() -> Vec<&'static Theme> {
    let mut themes = Vec::new();
    let _ = for_each_theme(|t| -> ControlFlow<()> {
        themes.push(t);
        ControlFlow::Continue(())
    });
    themes
}

/// Find a theme by exact name (case-sensitive).
///
/// Searches all enabled feature modules without allocation. Returns the
/// first match and stops iteration immediately.
///
/// # Examples
/// ```
/// let theme = chromata::find_by_name("Gruvbox Dark Hard");
/// assert!(theme.is_some());
/// ```
pub fn find_by_name(name: &str) -> Option<&'static Theme> {
    match for_each_theme(|t| {
        if t.name == name {
            ControlFlow::Break(t)
        } else {
            ControlFlow::Continue(())
        }
    }) {
        ControlFlow::Break(t) => Some(t),
        ControlFlow::Continue(()) => None,
    }
}

/// Filter all themes by variant (Dark or Light).
///
/// Returns themes matching the given variant across all enabled
/// feature modules.
///
/// # Examples
///
/// ```
/// use chromata::Variant;
///
/// let dark = chromata::filter_by_variant(Variant::Dark);
/// assert!(dark.iter().all(|t| t.variant == Variant::Dark));
/// ```
pub fn filter_by_variant(variant: Variant) -> Vec<&'static Theme> {
    let mut out = Vec::new();
    let _ = for_each_theme(|t| -> ControlFlow<()> {
        if t.variant == variant {
            out.push(t);
        }
        ControlFlow::Continue(())
    });
    out
}

/// Filter all themes by contrast level.
///
/// Returns themes matching the given contrast classification across
/// all enabled feature modules.
///
/// # Examples
///
/// ```
/// use chromata::Contrast;
///
/// let high = chromata::filter_by_contrast(Contrast::High);
/// assert!(high.iter().all(|t| t.contrast == Contrast::High));
/// ```
pub fn filter_by_contrast(contrast: Contrast) -> Vec<&'static Theme> {
    let mut out = Vec::new();
    let _ = for_each_theme(|t| -> ControlFlow<()> {
        if t.contrast == contrast {
            out.push(t);
        }
        ControlFlow::Continue(())
    });
    out
}