Function parse_equation

src/utils.rs:126–147

Parse an equation with the given zoom

(
    content: &str,
    zoom: f32,
)

/// Parse an equation with the given zoom
pub fn parse_equation(
    content: &str,
    zoom: f32,
) -> Result<PathBuf> {
    let path = Path::new(ART_PATH).join(hash(content)).with_extension("svg");

    // create a new tex file containing the equation
    if !path.with_extension("tex").exists() {
        let mut file = File::create(path.with_extension("tex")).map_err(Error::Io)?;

        file.write_all("\\documentclass[20pt, preview]{standalone}\n\\usepackage{amsmath}\\usepackage{amsfonts}\n\\begin{document}\n$$\n".as_bytes())
            .map_err(Error::Io)?;

        file.write_all(content.as_bytes())
            .map_err(Error::Io)?;

        file.write_all("$$\n\\end{document}".as_bytes())
            .map_err(Error::Io)?;
    }

    generate_svg_from_latex(&path, zoom)
}

/// Generate latex file from gnuplot
///