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#[macro_use]
extern crate neon;
extern crate libeditor;
use neon::prelude::*;
use libeditor::TextRange;
pub struct Wrapper {
inner: libeditor::File,
}
declare_types! {
/// A class for generating greeting strings.
pub class RustFile for Wrapper {
init(mut cx) {
let text = cx.argument::<JsString>(0)?.value();
Ok(Wrapper {
inner: libeditor::File::new(&text)
})
}
method syntaxTree(mut cx) {
let tree = {
let this = cx.this();
let guard = cx.lock();
let wrapper = this.borrow(&guard);
wrapper.inner.syntax_tree()
};
Ok(cx.string(tree.as_str()).upcast())
}
method highlight(mut cx) {
let highlights = {
let this = cx.this();
let guard = cx.lock();
let wrapper = this.borrow(&guard);
wrapper.inner.highlight()
};
let res = cx.empty_array();
for (i, hl) in highlights.into_iter().enumerate() {
let start: u32 = hl.range.start().into();
let end: u32 = hl.range.end().into();
let start = cx.number(start);
let end = cx.number(end);
let tag = cx.string(hl.tag);
let hl = cx.empty_array();
hl.set(&mut cx, 0, start)?;
hl.set(&mut cx, 1, end)?;
hl.set(&mut cx, 2, tag)?;
res.set(&mut cx, i as u32, hl)?;
}
Ok(res.upcast())
}
method extendSelection(mut cx) {
let from_offset = cx.argument::<JsNumber>(0)?.value() as u32;
let to_offset = cx.argument::<JsNumber>(1)?.value() as u32;
let text_range = TextRange::from_to(from_offset.into(), to_offset.into());
let extended_range = {
let this = cx.this();
let guard = cx.lock();
let wrapper = this.borrow(&guard);
wrapper.inner.extend_selection(text_range)
};
match extended_range {
None => Ok(cx.null().upcast()),
Some(range) => {
let start: u32 = range.start().into();
let end: u32 = range.end().into();
let start = cx.number(start);
let end = cx.number(end);
let arr = cx.empty_array();
arr.set(&mut cx, 0, start)?;
arr.set(&mut cx, 1, end)?;
Ok(arr.upcast())
}
}
}
}
}
register_module!(mut cx, {
cx.export_class::<RustFile>("RustFile")
});
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