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|
use ra_text_edit::TextEditBuilder;
use ra_syntax::{
algo::find_leaf_at_offset,
Direction, SourceFileNode,
SyntaxKind::COMMA,
TextUnit,
};
use crate::assists::{LocalEdit, non_trivia_sibling};
pub fn flip_comma<'a>(
file: &'a SourceFileNode,
offset: TextUnit,
) -> Option<impl FnOnce() -> LocalEdit + 'a> {
let syntax = file.syntax();
let comma = find_leaf_at_offset(syntax, offset).find(|leaf| leaf.kind() == COMMA)?;
let prev = non_trivia_sibling(comma, Direction::Prev)?;
let next = non_trivia_sibling(comma, Direction::Next)?;
Some(move || {
let mut edit = TextEditBuilder::new();
edit.replace(prev.range(), next.text().to_string());
edit.replace(next.range(), prev.text().to_string());
LocalEdit {
label: "flip comma".to_string(),
edit: edit.finish(),
cursor_position: None,
}
})
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_utils::check_action;
#[test]
fn test_swap_comma() {
check_action(
"fn foo(x: i32,<|> y: Result<(), ()>) {}",
"fn foo(y: Result<(), ()>,<|> x: i32) {}",
|file, off| flip_comma(file, off).map(|f| f()),
)
}
}
|
