Method consumeAURLToken

packages/core/css/CSS3Parser.ts:369–431

* 4.3.5. Consume a url token * https://www.w3.org/TR/css-syntax-3/#consume-a-url-token

()

	 * https://www.w3.org/TR/css-syntax-3/#consume-a-url-token
	 */
	private consumeAURLToken(): InputToken {
		const start = this.nextInputCodePointIndex - 3 /* url */ - 1; /* ( */
		const urlToken: InputToken = {
			type: TokenObjectType.url,
			text: undefined,
		};
		this.consumeAWhitespace();
		if (this.nextInputCodePointIndex >= this.text.length) {
			return urlToken;
		}
		const nextInputCodePoint = this.text[this.nextInputCodePointIndex];
		if (nextInputCodePoint === '"' || nextInputCodePoint === "'") {
			const stringToken = this.consumeAStringToken();
			// TODO: Handle bad-string.
			// TODO: Set value instead.
			urlToken.text = stringToken.text;
			this.consumeAWhitespace();
			if (this.text[this.nextInputCodePointIndex] === ')' || this.nextInputCodePointIndex >= this.text.length) {
				this.nextInputCodePointIndex++;
				const end = this.nextInputCodePointIndex;
				urlToken.text = this.text.substring(start, end);

				return urlToken;
			} else {
				// TODO: Handle bad-url.
				return null;
			}
		}

		while (this.nextInputCodePointIndex < this.text.length) {
			const char = this.text[this.nextInputCodePointIndex++];
			switch (char) {
				case ')':
					return urlToken;
				case ' ':
				case '\t':
				case '\n':
				case '\r':
				case '\f':
					this.consumeAWhitespace();
					if (this.text[this.nextInputCodePointIndex] === ')') {
						this.nextInputCodePointIndex++;

						return urlToken;
					} else {
						// TODO: Bar url! Consume remnants.
						return null;
					}
				case '"':
				case "'":
					// TODO: Parse error! Bar url! Consume remnants.
					return null;
				case '\\':
					// TODO: Escape!
					throw new Error('Escaping not yet supported!');
				default:
					// TODO: Non-printable chars - error.
					urlToken.text += char;