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use lina::font::{self, Font};
use lina::{escape, render_svg};
const DEFAULT_FONT: &str = "font/latinmodern-math.otf";
const SAMPLES: &[(&str, &str)] = &[
("H-O-H", "Water. Bonds stop at the edge of the letters"),
("O=C=O", "Carbon dioxide. Double bonds"),
("N~N", "Nitrogen. A triple bond"),
("H_3C-CH_3", "Ethane. The bond stops at the last C of H_3C and the first C of CH_3"),
("H_3C-CH_2-OH", "Ethanol"),
("H_3C-[:30]CH_2-[:-30]CH_2-[:30]CH_3", "Butane. The angles alternate"),
("-[:30]-[:-30]-[:30]-[:-30]", "The skeleton of pentane, with no labels at all"),
("H-[:30]C(-[:90]H)(-[:-90]H)-[:-30]H", "Methane. Two branches"),
("H_3C-C(=[:90]O)-OH", "Acetic acid. A double bond in a branch"),
("H_2N-CH_2-C(=[:90]O)-OH", "Glycine"),
("H_3C-CH_2-C(=[:90]O)-CH_2-CH_3", "3-Pentanone"),
("\\chemfig{H_3C-CH_2-OH}", "The LaTeX wrapper is taken off"),
("\\chemname{\\chemfig{O=C=O}}{carbon dioxide}", "The name goes under the figure"),
("Na^+", "A charge as a superscript"),
("SO_4^{2-}", "A subscript and a grouped superscript"),
("H_2SO_4", "Sulfuric acid. Two subscripts"),
("*6(------)", "Cyclohexane. A six-membered ring"),
("*5(-----)", "Cyclopentane"),
("*3(---)", "Cyclopropane"),
("*6(-=-=-=)", "Benzene. Double bonds in a ring move inward and are shortened at both ends"),
("**6(------)", "Benzene. The circle of an aromatic ring"),
("H_3C-*6(-=-=-=)", "Toluene. A ring extends along the bond that reaches it"),
("*6(-N=-=-=)", "Pyridine"),
("*6(-(-OH)-----)", "Cyclohexanol. A branch with no angle points out of the ring"),
("*6(--*5(-----)----)", "A ring on a ring vertex"),
("HO-*6(-=-(-OH)=-=)", "Hydroquinone. A branch on a ring reached from a chain"),
("?[a]-[:0]-[:-90]-[:180]?[a]", "Two marks with the same name draw a bond between them"),
("*6(--?[a]-(-[:0]-[:60]-[:120]-[:180]?[a])---)", "The skeleton of decalin, fused with marks"),
("*6(-=?[a]-(=[:0]-[:60]=[:120]-[:180]?[a,=])=-=)", "Naphthalene"),
("X(>[:0]a)(<[:60]b)(>:[:120]c)(<:[:180]d)(>|[:240]e)(<|[:300]f)", "The six wedges"),
("H_3C-C(>[:90]OH)(<:[:-90]H)-CH_2-CH_3", "2-Butanol. Filled toward the viewer, hashed away"),
("A-[::30]B-[::30]C-[::30]D-[::30]E", "Repeated relative angles make an arc"),
("A-[,0.5]B-[,1]C-[,2]D", "Bond length factors"),
("C-[,,1]C", "A part number on the leaving side"),
("A-[45]B", "A mistake. Degrees are written as :45"),
];
const PAGE_STYLE: &str = "body{margin:0;padding:56px 40px 96px;color:#1f1f1f;background:#fff;\
font-family:system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.9}
h1{font-size:19px;font-weight:500;margin:0 0 8px}
p{max-width:46em;margin:0 0 40px;color:#767676}
.item{margin-bottom:44px}
.source{color:#767676;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;\
line-height:1.6;margin-bottom:6px;word-break:break-all}
.note{color:#767676;font-size:12px;margin-bottom:14px}
.figure{font-size:16px;overflow-x:auto;max-width:100%}
.wrong{color:#a33}";
fn main() {
let mut argument: Vec<String> = std::env::args().skip(1).collect();
let mut path = DEFAULT_FONT.to_string();
if let Some(index) = argument.iter().position(|value| value == "--font") {
if index + 1 >= argument.len() {
eprintln!("give a font file after --font");
std::process::exit(1);
}
path = argument.remove(index + 1);
argument.remove(index);
}
let data = match std::fs::read(&path) {
Ok(data) => data,
Err(reason) => {
eprintln!("cannot read the font: {path}: {reason}");
std::process::exit(1);
}
};
let font = match font::load(data) {
Ok(font) => font,
Err(reason) => {
eprintln!("cannot load the font: {path}: {reason}");
std::process::exit(1);
}
};
let shown: Vec<(&str, &str)> = if argument.is_empty() {
SAMPLES.to_vec()
} else {
argument.iter().map(|value| (value.as_str(), "")).collect()
};
write_page(&font, &shown);
}
fn write_page(font: &Font, shown: &[(&str, &str)]) {
println!("<!DOCTYPE html>");
println!("<html lang=\"en\">");
println!("<head>");
println!("<meta charset=\"utf-8\">");
println!("<title>lina</title>");
println!("<style>{PAGE_STYLE}</style>");
println!("</head>");
println!("<body>");
println!("<h1>lina</h1>");
println!(
"<p>The typeface is {}. Glyphs are drawn as outlines, so the reader needs no font. \
Sizes are written in em, so the figures scale with the text around them.</p>",
escape(font::family(font))
);
for (source, note) in shown {
println!("<div class=\"item\">");
println!("<div class=\"source\">{}</div>", escape(source));
if !note.is_empty() {
println!("<div class=\"note\">{}</div>", escape(note));
}
match render_svg(source, font) {
Ok(markup) => println!("<div class=\"figure\">{markup}</div>"),
Err(reason) => {
println!("<div class=\"note wrong\">{}</div>", escape(&reason.to_string()))
}
}
println!("</div>");
}
println!("</body>");
println!("</html>");
}