Current File : /var/www/html/node_modules/eslint-plugin-jsx-a11y/lib/util/mayHaveAccessibleLabel.js
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = mayHaveAccessibleLabel;
var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));
var _arrayIncludes = _interopRequireDefault(require("array-includes"));
var _jsxAstUtils = require("jsx-ast-utils");
/**
* Returns true if a labelling element is found or if it cannot determine if
* a label is present because of expression containers or spread attributes.
* A false return value means that the node definitely does not have a label,
* but a true return return value means that the node may or may not have a
* label.
*
*
*/
function hasLabellingProp(openingElement) {
var additionalLabellingProps = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
var labellingProps = ['alt', // Assume alt is used correctly on an image
'aria-label', 'aria-labelledby'].concat((0, _toConsumableArray2["default"])(additionalLabellingProps));
return openingElement.attributes.some(function (attribute) {
// We must assume that a spread value contains a labelling prop.
if (attribute.type !== 'JSXAttribute') {
return true;
} // Attribute matches.
if ((0, _arrayIncludes["default"])(labellingProps, (0, _jsxAstUtils.propName)(attribute)) && !!(0, _jsxAstUtils.getPropValue)(attribute)) {
return true;
}
return false;
});
}
function mayHaveAccessibleLabel(root) {
var maxDepth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
var additionalLabellingProps = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];
function checkElement(node, depth) {
// Bail when maxDepth is exceeded.
if (depth > maxDepth) {
return false;
} // Check for literal text.
if (node.type === 'Literal' && !!node.value) {
return true;
} // Assume an expression container renders a label. It is the best we can
// do in this case.
if (node.type === 'JSXExpressionContainer') {
return true;
} // Check for JSXText.
// $FlowFixMe Remove after updating ast-types-flow
if (node.type === 'JSXText' && !!node.value) {
return true;
} // Check for labelling props.
if (node.openingElement
/* $FlowFixMe */
&& hasLabellingProp(node.openingElement, additionalLabellingProps)) {
return true;
} // Recurse into the child element nodes.
if (node.children) {
/* $FlowFixMe */
for (var i = 0; i < node.children.length; i += 1) {
/* $FlowFixMe */
if (checkElement(node.children[i], depth + 1)) {
return true;
}
}
}
return false;
}
return checkElement(root, 0);
}
module.exports = exports.default;
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