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path: root/support/texlab/src/features/rename/entry.rs
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use std::collections::HashMap;

use lsp_types::{Range, RenameParams, TextEdit, WorkspaceEdit};
use rowan::ast::AstNode;

use crate::{
    features::cursor::{CursorContext, HasPosition},
    syntax::{
        bibtex::{self, HasName},
        latex,
    },
    DocumentData, LineIndexExt,
};

pub fn prepare_entry_rename<P: HasPosition>(context: &CursorContext<P>) -> Option<Range> {
    let (_, range) = context
        .find_citation_key_word()
        .or_else(|| context.find_entry_key())?;

    Some(
        context
            .request
            .main_document()
            .line_index
            .line_col_lsp_range(range),
    )
}

pub fn rename_entry(context: &CursorContext<RenameParams>) -> Option<WorkspaceEdit> {
    prepare_entry_rename(context)?;
    let (key_text, _) = context
        .find_citation_key_word()
        .or_else(|| context.find_entry_key())?;

    let mut changes = HashMap::new();
    for document in context.request.workspace.documents_by_uri.values() {
        match &document.data {
            DocumentData::Latex(data) => {
                let edits: Vec<_> = latex::SyntaxNode::new_root(data.green.clone())
                    .descendants()
                    .filter_map(latex::Citation::cast)
                    .filter_map(|citation| citation.key_list())
                    .flat_map(|keys| keys.keys())
                    .filter(|key| key.to_string() == key_text)
                    .map(|key| {
                        document
                            .line_index
                            .line_col_lsp_range(latex::small_range(&key))
                    })
                    .map(|range| TextEdit::new(range, context.request.params.new_name.clone()))
                    .collect();
                changes.insert(document.uri.as_ref().clone(), edits);
            }
            DocumentData::Bibtex(data) => {
                let edits: Vec<_> = bibtex::SyntaxNode::new_root(data.green.clone())
                    .descendants()
                    .filter_map(bibtex::Entry::cast)
                    .filter_map(|entry| entry.name_token())
                    .filter(|key| key.text() == key_text)
                    .map(|key| document.line_index.line_col_lsp_range(key.text_range()))
                    .map(|range| TextEdit::new(range, context.request.params.new_name.clone()))
                    .collect();
                changes.insert(document.uri.as_ref().clone(), edits);
            }
            DocumentData::BuildLog(_) => {}
        }
    }

    Some(WorkspaceEdit::new(changes))
}

#[cfg(test)]
mod tests {
    use lsp_types::TextEdit;

    use crate::{features::testing::FeatureTester, RangeExt};

    use super::*;

    #[test]
    fn test_entry() {
        let tester = FeatureTester::builder()
            .files(vec![
                ("main.bib", r#"@article{foo, bar = baz}"#),
                ("main.tex", "\\addbibresource{main.bib}\n\\cite{foo}"),
            ])
            .main("main.bib")
            .line(0)
            .character(9)
            .new_name("qux")
            .build();

        let uri1 = tester.uri("main.bib");
        let uri2 = tester.uri("main.tex");
        let request = tester.rename();

        let context = CursorContext::new(request);
        let actual_edit = rename_entry(&context).unwrap();

        let mut expected_changes = HashMap::new();
        expected_changes.insert(
            uri1.as_ref().clone(),
            vec![TextEdit::new(Range::new_simple(0, 9, 0, 12), "qux".into())],
        );
        expected_changes.insert(
            uri2.as_ref().clone(),
            vec![TextEdit::new(Range::new_simple(1, 6, 1, 9), "qux".into())],
        );
        let expected_edit = WorkspaceEdit::new(expected_changes);

        assert_eq!(actual_edit, expected_edit);
    }

    #[test]
    fn test_citation() {
        let tester = FeatureTester::builder()
            .files(vec![
                ("main.bib", r#"@article{foo, bar = baz}"#),
                ("main.tex", "\\addbibresource{main.bib}\n\\cite{foo}"),
            ])
            .main("main.tex")
            .line(1)
            .character(6)
            .new_name("qux")
            .build();

        let uri1 = tester.uri("main.bib");
        let uri2 = tester.uri("main.tex");
        let request = tester.rename();

        let context = CursorContext::new(request);
        let actual_edit = rename_entry(&context).unwrap();

        let mut expected_changes = HashMap::new();
        expected_changes.insert(
            uri1.as_ref().clone(),
            vec![TextEdit::new(Range::new_simple(0, 9, 0, 12), "qux".into())],
        );
        expected_changes.insert(
            uri2.as_ref().clone(),
            vec![TextEdit::new(Range::new_simple(1, 6, 1, 9), "qux".into())],
        );
        let expected_edit = WorkspaceEdit::new(expected_changes);

        assert_eq!(actual_edit, expected_edit);
    }
}