Method walkSelectorList

lib/css/CssParser.js:1997–2170

(values, localMode, topLevel = true)

		 * @returns {void}
		 */
		const walkSelectorList = (values, localMode, topLevel = true) => {
			// At a rule's top level, inherit persistent `modeData` (or the one-shot `suppressNextRulePrelude` → "global"); recursive calls use the passed `localMode`.
			let segmentMode = localMode;
			if (topLevel) {
				if (suppressNextRulePrelude) {
					segmentMode = "global";
					suppressNextRulePrelude = false;
				} else if (modeData) {
					segmentMode = modeData;
				}
			}
			for (let i = 0; i < values.length; i++) {
				const v = values[i];
				switch (A.type(v)) {
					case NodeType.Whitespace:
						break;
					case NodeType.Comma:
						if (topLevel) {
							// Top-level comma resets the segment + persistent mode and, in pure mode, finalizes the segment's purity.
							segmentMode = localMode;
							modeData = undefined;
							pure.finalizeSelector();
						}
						break;
					case NodeType.Colon: {
						// Look ahead for `:local` / `:global` markers; other pseudos fall through.
						const next = values[i + 1];
						if (!next) break;
						const nextType = A.type(next);
						if (nextType === NodeType.Ident) {
							const raw = A.value(next);
							const isLocal = equalsLowerCase(raw, "local");
							if (isLocal || equalsLowerCase(raw, "global")) {
								const id = isLocal ? "local" : "global";
								// Bare `:local` / `:global`: switch the segment (and top-level persistent) mode and strip the marker.
								const afterIsWhitespace = stripBareMarker(
									v,
									next,
									values[i + 2]
								);
								// Bare `:local` / `:global` needs whitespace before the next selector (else `:local.b` is ambiguous) — warn when none follows.
								if (!afterIsWhitespace) {
									this._emitWarning(
										state,
										`Missing whitespace after ':${id}' in '${source.slice(
											A.start(v),
											findLeftCurly(source, A.end(next)) + 1
										)}'`,
										locConverter,
										A.start(v),
										A.end(next)
									);
								}
								segmentMode = id;
								if (topLevel) modeData = id;
								// Skip past the colon + ident.
								i += 1;
							}