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use rowan::{TextRange, TextSize};
use rustc_hash::FxHashMap;
use crate::util::cursor::CursorContext;
use super::{Indel, Params, RenameResult};
pub(super) fn prepare_rename<T>(context: &CursorContext<T>) -> Option<TextRange> {
context.cursor.command_range(context.offset)
}
pub(super) fn rename(context: &CursorContext<Params>) -> Option<RenameResult> {
prepare_rename(context)?;
let name = context.cursor.as_tex()?.text();
let mut changes = FxHashMap::default();
for document in context.related() {
if let Some(data) = document.parse(context.db).as_tex() {
let root = data.root(context.db);
let edits = root
.descendants_with_tokens()
.filter_map(|element| element.into_token())
.filter(|token| token.kind().is_command_name() && token.text() == name)
.map(|token| {
let range = token.text_range();
Indel {
delete: TextRange::new(range.start() + TextSize::from(1), range.end()),
insert: context.params.new_name.clone(),
}
})
.collect();
changes.insert(document, edits);
}
}
Some(RenameResult { changes })
}
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