Function consumeABlocksContents

lib/css/syntax.js:2517–2570

(ts, onNode)

 * @returns {{ decls: Declaration[], rules: Rule[] }} consumed decls + rules (both empty when `onNode` is given; stops at the enclosing `}` / EOF, left in the stream)
 */
const consumeABlocksContents = (ts, onNode) => {
	/** @type {Declaration[]} */
	const decls = [];
	/** @type {Rule[]} */
	const rules = [];

	// Process input:
	for (;;) {
		const t = ts.next();

		// <whitespace-token> / <semicolon-token>
		// Discard a token from input.
		if (t.type === TT_WHITESPACE || t.type === TT_SEMICOLON) {
			ts.discard();
		}
		// <EOF-token> / <}-token>
		// Return decls and rules.
		else if (t.type === TT_EOF || t.type === TT_RIGHT_CURLY_BRACKET) {
			return { decls, rules };
		}
		// <at-keyword-token>
		// Consume an at-rule from input, with nested set to true. If a rule was returned, append it to rules.
		else if (t.type === TT_AT_KEYWORD) {
			const atRule = consumeAnAtRule(ts, true);
			if (atRule) {
				if (onNode) onNode(atRule);
				else rules.push(atRule);
			}
		}
		// anything else
		// Mark input. Consume a declaration from input, with nested set to true.
		// If a declaration was returned, append it to decls, and discard a mark from input.
		// Otherwise, restore a mark from input, then consume a qualified rule from input, with nested set to true, and <semicolon-token> as the stop token. If a rule was returned, append it to rules.
		else {
			// 2-token peek: consume-a-declaration's steps 1 / 3 require `<ident> <colon>`; if absent it would call consume-the-remnants-of-a-bad-declaration (potentially the rest of the enclosing block) only for the restoreMark to undo it (O(N²) on flat blocks of qualified rules). Skip straight to consume-a-qualified-rule — same observable result.
			if (declarationStartLikely(ts)) {
				ts.mark();
				const decl = consumeADeclaration(ts, true);
				if (decl) {
					if (onNode) onNode(decl);
					else decls.push(decl);
					ts.discardMark();
					continue;
				}
				ts.restoreMark();
			}
			const rule = consumeAQualifiedRule(ts, TT_SEMICOLON, true);
			if (rule) {
				if (onNode) onNode(rule);
				else rules.push(rule);
			}
		}
	}
};

/**
 * Consume the remnants of a bad declaration, CSS Syntax Level 3 [§5.4.11](https://drafts.csswg.org/css-syntax/#consume-the-remnants-of-a-bad-declaration). Advances the stream past a malformed declaration's tail so the caller (`consumeABlocksContents`) can resume cleanly.