Method handleAttributeSelector

lib/css/CssParser.js:1919–1988

(block)

		 * @returns {void}
		 */
		const handleAttributeSelector = (block) => {
			const attrParts = A.children(block);
			let ai = 0;
			while (
				ai < attrParts.length &&
				A.type(attrParts[ai]) === NodeType.Whitespace
			) {
				ai++;
			}
			const attrNameNode = attrParts[ai];
			if (!attrNameNode || A.type(attrNameNode) !== NodeType.Ident) return;
			const attrName = A.unescaped(attrNameNode);
			if (!equalsLowerCase(attrName, "class")) return;
			ai++;
			while (
				ai < attrParts.length &&
				A.type(attrParts[ai]) === NodeType.Whitespace
			) {
				ai++;
			}
			// `=` or `~=` (two `Delim` tokens for the latter).
			const op1 = attrParts[ai];
			if (!op1 || A.type(op1) !== NodeType.Delim) return;
			const op1v = A.value(op1);
			if (op1v === "~") {
				ai++;
				const op2 = attrParts[ai];
				if (!op2 || A.type(op2) !== NodeType.Delim || A.value(op2) !== "=") {
					return;
				}
			} else if (op1v !== "=") {
				return;
			}
			ai++;
			while (
				ai < attrParts.length &&
				A.type(attrParts[ai]) === NodeType.Whitespace
			) {
				ai++;
			}
			const attrValueNode = attrParts[ai];
			if (!attrValueNode) return;
			/** @type {number} */
			let classNameStart;
			/** @type {number} */
			let classNameEnd;
			if (A.type(attrValueNode) === NodeType.String) {
				classNameStart = A.start(attrValueNode) + 1;
				classNameEnd = A.end(attrValueNode) - 1;
			} else if (A.type(attrValueNode) === NodeType.Ident) {
				classNameStart = A.start(attrValueNode);
				classNameEnd = A.end(attrValueNode);
			} else {
				return;
			}
			const className = unescapeRange(classNameStart, classNameEnd);
			const { line: sl, column: sc } = locConverter.get(classNameStart);
			const { line: el, column: ec } = locConverter.get(classNameEnd);