use oxc_ast::ast::Program;
use oxc_ast_visit::Visit;
use oxc_semantic::Semantic;
use crate::rules::{Rule, RuleFinding, RuleMeta, Severity};
pub struct TabindexNoPositive;
const RULE_META: RuleMeta = RuleMeta {
id: "tabindex-no-positive",
default_severity: Severity::Error,
category: "accessibility",
description: "Avoid positive tabIndex values; only 0 and -1 are valid",
};
impl Rule for TabindexNoPositive {
fn meta(&self) -> &RuleMeta {
&RULE_META
}
fn run(&self, program: &Program, _semantic: &Semantic, source_text: &str) -> Vec<RuleFinding> {
let mut collector = TabindexCollector {
findings: Vec::new(),
source: source_text,
};
collector.visit_program(program);
collector.findings
}
}
struct TabindexCollector<'a> {
findings: Vec<RuleFinding>,
source: &'a str,
}
impl<'a> Visit<'a> for TabindexCollector<'a> {
fn visit_jsx_opening_element(&mut self, el: &oxc_ast::ast::JSXOpeningElement<'a>) {
for attr in &el.attributes {
if let oxc_ast::ast::JSXAttributeItem::Attribute(a) = attr
&& let oxc_ast::ast::JSXAttributeName::Identifier(id) = &a.name
&& id.name.as_str() == "tabIndex"
&& let Some(value) = &a.value
{
if let oxc_ast::ast::JSXAttributeValue::ExpressionContainer(expr) = value
&& let Some(oxc_ast::ast::Expression::NumericLiteral(n)) =
expr.expression.as_expression()
&& n.value > 0.0
{
let start = el.span.start as usize;
let line = self.source[..start].lines().count().max(1);
let col = start - self.source[..start].rfind('\n').map(|i| i + 1).unwrap_or(0);
self.findings.push(RuleFinding {
line,
column: col + 1,
message: format!(
"tabIndex={} is positive; use 0 or -1 only",
n.value as i64
),
});
}
if let oxc_ast::ast::JSXAttributeValue::StringLiteral(s) = value
&& let Ok(n) = s.value.parse::<i64>()
&& n > 0
{
let start = el.span.start as usize;
let line = self.source[..start].lines().count().max(1);
let col = start - self.source[..start].rfind('\n').map(|i| i + 1).unwrap_or(0);
self.findings.push(RuleFinding {
line,
column: col + 1,
message: format!("tabIndex=\"{}\" is positive; use 0 or -1 only", n),
});
}
}
}
}
}