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#[macro_export]
macro_rules! jss {
($($tokens:tt)+) => {
{
let json = serde_json::json!($($tokens)*);
let mut buffer = String::new();
if let Some(css) = json.as_object(){
for (index,(classes, style_properties)) in css.iter().enumerate(){
if index > 0 {
buffer += "\n";
}
buffer += &classes;
buffer += " {\n";
if let Some(style_properties) = style_properties.as_object(){
for (prop, value) in style_properties{
let value_str = match value{
serde_json::Value::String(s) => s.to_string(),
serde_json::Value::Number(v) => v.to_string(),
serde_json::Value::Bool(v) => v.to_string(),
_ => panic!("supported values are String, Number or Bool only"),
};
buffer += &format!(" {}: {};\n", prop, value_str);
}
}
buffer += "}";
}
}
buffer
}
}
}
#[cfg(test)]
mod test {
#[test]
fn test_jss() {
let css = jss!({
".layer": {
"background-color": "red",
"border": "1px solid green",
},
".hide .layer": {
"opacity": 0,
},
});
let expected = r#".layer {
background-color: red;
border: 1px solid green;
}
.hide .layer {
opacity: 0;
}"#;
println!("{}", css);
assert_eq!(expected, css);
}
}