tailwind-css-fixes 0.12.31

Fixes for tailwind-css crate (Compile tailwind short instructions to css)
Documentation 
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use std::collections::BTreeMap;

mod traits;

#[derive(Clone, Debug, Default)]
pub struct BreakPointSystem {
    inner: BTreeMap<String, BreakPoint>,
}

impl BreakPointSystem {
    /// Builtin ranges
    /// https://tailwindcss.com/docs/screens
    pub fn builtin() -> Self {
        let mut new = Self::default();
        new.register("sm".to_string(), 640);
        new.register("md".to_string(), 768);
        new.register("lg".to_string(), 1024);
        new.register("xl".to_string(), 1280);
        new.register("2xl".to_string(), 1536);
        new
    }

    pub fn try_get_width(&self, name: &str) -> Result<usize, String> {
        match self.inner.get(name) {
            Some(bp) => Ok(bp.width),
            None => Err(format!("no such breakpoint: {}", name)),
        }
    }

    #[inline]
    pub fn register(&mut self, name: String, width: usize) -> Option<BreakPoint> {
        self.inner.insert(name, BreakPoint { width })
    }
}

#[derive(Clone, Debug)]
pub struct BreakPoint {
    /// min-width
    /// unit: px
    width: usize,
}