Method resolve_extract_variable

src/code_actions/extract_variable.rs:744–871

Resolve a deferred "Extract Variable" code action by computing the full workspace edit. Called from `resolve_code_action` when `action_kind` is `"refactor.extractVariable"` or `"refactor.extractVariableAll"`.

(
        &self,
        data: &CodeActionData,
        content: &str,
    )

    /// Called from `resolve_code_action` when `action_kind` is
    /// `"refactor.extractVariable"` or `"refactor.extractVariableAll"`.
    pub(crate) fn resolve_extract_variable(
        &self,
        data: &CodeActionData,
        content: &str,
    ) -> Option<WorkspaceEdit> {
        let all_occurrences = data
            .extra
            .get("all_occurrences")
            .and_then(|v| v.as_bool())
            .unwrap_or(data.action_kind == "refactor.extractVariableAll");

        let start_offset = position_to_byte_offset(content, data.range.start);
        let end_offset = position_to_byte_offset(content, data.range.end);

        if start_offset >= end_offset || end_offset > content.len() {
            return None;
        }

        let selected_text = &content[start_offset..end_offset];
        let trimmed = selected_text.trim();

        if trimmed.is_empty() || !is_valid_expression(trimmed) {
            return None;
        }

        // Generate variable name and deduplicate.
        let base_name = generate_variable_name(selected_text);
        let scope_map = build_scope_map(content, start_offset as u32);
        let existing_vars = scope_map.variables_in_scope(start_offset as u32);
        let var_name = deduplicate_name(&base_name, &existing_vars);

        let rhs = strip_outer_parens(trimmed);
        let replacement_text = format!("${}", var_name);

        let doc_uri: Url = match data.uri.parse() {
            Ok(u) => u,
            Err(_) => return None,
        };

        if all_occurrences {
            // ── All occurrences mode ────────────────────────────────
            let (scope_start, scope_end) = scope_map
                .enclosing_frame(start_offset as u32)
                .map(|f| (f.start as usize, f.end as usize))
                .unwrap_or((0, content.len()));

            let trim_start_delta = selected_text.len() - selected_text.trim_start().len();
            let trim_end_delta = selected_text.len() - selected_text.trim_end().len();
            let trimmed_start = start_offset + trim_start_delta;
            let trimmed_end = end_offset - trim_end_delta;

            let other_occurrences = find_identical_occurrences(
                content,
                trimmed,
                trimmed_start,
                trimmed_end,
                scope_start,
                scope_end,