vize_atelier_sfc 0.16.0

//! Internal CSS compilation with LightningCSS.
//!
//! Handles parsing, minification, and printing of CSS using the LightningCSS engine.
//! This module is only available when the `native` feature is enabled.

use lightningcss::printer::PrinterOptions;
use lightningcss::stylesheet::{ParserFlags, ParserOptions, StyleSheet};
use lightningcss::targets::Targets;
use vize_carton::{String, ToCompactString};

/// Convert major version to LightningCSS format (major << 16)
pub(crate) fn version_to_u32(major: u32) -> u32 {
    major << 16
}

/// Internal CSS compilation with owned strings to avoid borrow issues
pub(crate) fn compile_css_internal(
    css: &str,
    filename: &str,
    minify: bool,
    targets: Targets,
    custom_media: bool,
) -> (String, Vec<String>) {
    let mut flags = ParserFlags::NESTING | ParserFlags::DEEP_SELECTOR_COMBINATOR;
    if custom_media {
        flags |= ParserFlags::CUSTOM_MEDIA;
    }
    let parser_options = ParserOptions {
        filename: filename.into(),
        flags,
        ..Default::default()
    };

    let mut stylesheet = match StyleSheet::parse(css, parser_options) {
        Ok(ss) => ss,
        Err(e) => {
            let mut errors = Vec::with_capacity(1);
            let mut message = String::from("CSS parse error: ");
            message.push_str(&e.to_compact_string());
            errors.push(message);
            return (css.to_compact_string(), errors);
        }
    };

    // Minify if requested
    if minify {
        if let Err(e) = stylesheet.minify(lightningcss::stylesheet::MinifyOptions {
            targets,
            ..Default::default()
        }) {
            let mut errors = Vec::with_capacity(1);
            let mut message = String::from("CSS minify error: ");
            use std::fmt::Write as _;
            let _ = write!(&mut message, "{:?}", e);
            errors.push(message);
            return (css.to_compact_string(), errors);
        }
    }

    // Print the CSS
    let printer_options = PrinterOptions {
        minify,
        targets,
        ..Default::default()
    };

    match stylesheet.to_css(printer_options) {
        Ok(result) => (result.code.into(), vec![]),
        Err(e) => {
            let mut errors = Vec::with_capacity(1);
            let mut message = String::from("CSS print error: ");
            use std::fmt::Write as _;
            let _ = write!(&mut message, "{:?}", e);
            errors.push(message);
            (css.to_compact_string(), errors)
        }
    }
}