react_auditor/rules/performance/
tabindex_no_positive.rs

1use oxc_ast::ast::Program;
2use oxc_ast_visit::Visit;
3use oxc_semantic::Semantic;
4
5use crate::rules::{Rule, RuleFinding, RuleMeta, Severity};
6
7pub struct TabindexNoPositive;
8
9const RULE_META: RuleMeta = RuleMeta {
10    id: "tabindex-no-positive",
11    default_severity: Severity::Error,
12    category: "accessibility",
13    description: "Avoid positive tabIndex values; only 0 and -1 are valid",
14};
15
16impl Rule for TabindexNoPositive {
17    fn meta(&self) -> &RuleMeta {
18        &RULE_META
19    }
20
21    fn run(&self, program: &Program, _semantic: &Semantic, source_text: &str) -> Vec<RuleFinding> {
22        let mut collector = TabindexCollector {
23            findings: Vec::new(),
24            source: source_text,
25        };
26        collector.visit_program(program);
27        collector.findings
28    }
29}
30
31struct TabindexCollector<'a> {
32    findings: Vec<RuleFinding>,
33    source: &'a str,
34}
35
36impl<'a> Visit<'a> for TabindexCollector<'a> {
37    fn visit_jsx_opening_element(&mut self, el: &oxc_ast::ast::JSXOpeningElement<'a>) {
38        for attr in &el.attributes {
39            if let oxc_ast::ast::JSXAttributeItem::Attribute(a) = attr
40                && let oxc_ast::ast::JSXAttributeName::Identifier(id) = &a.name
41                && id.name.as_str() == "tabIndex"
42                && let Some(value) = &a.value
43            {
44                if let oxc_ast::ast::JSXAttributeValue::ExpressionContainer(expr) = value
45                    && let Some(oxc_ast::ast::Expression::NumericLiteral(n)) =
46                        expr.expression.as_expression()
47                    && n.value > 0.0
48                {
49                    let start = el.span.start as usize;
50                    let line = self.source[..start].lines().count().max(1);
51                    let col = start - self.source[..start].rfind('\n').map(|i| i + 1).unwrap_or(0);
52                    self.findings.push(RuleFinding {
53                        line,
54                        column: col + 1,
55                        message: format!(
56                            "tabIndex={} is positive; use 0 or -1 only",
57                            n.value as i64
58                        ),
59                    });
60                }
61                if let oxc_ast::ast::JSXAttributeValue::StringLiteral(s) = value
62                    && let Ok(n) = s.value.parse::<i64>()
63                    && n > 0
64                {
65                    let start = el.span.start as usize;
66                    let line = self.source[..start].lines().count().max(1);
67                    let col = start - self.source[..start].rfind('\n').map(|i| i + 1).unwrap_or(0);
68                    self.findings.push(RuleFinding {
69                        line,
70                        column: col + 1,
71                        message: format!("tabIndex=\"{}\" is positive; use 0 or -1 only", n),
72                    });
73                }
74            }
75        }
76    }
77}
react_auditor/rules/performance/tabindex_no_positive.rs

react_auditor/rules/performance/
tabindex_no_positive.rs
