Method consumeAToken

packages/core/css/CSS3Parser.ts:147–227

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

()

	 * https://www.w3.org/TR/css-syntax-3/#consume-a-token
	 */
	private consumeAToken(): InputToken {
		if (this.reconsumedInputToken) {
			const result = this.reconsumedInputToken;
			this.reconsumedInputToken = null;

			return result;
		}
		const char = this.text[this.nextInputCodePointIndex];
		switch (char) {
			case '"':
				return this.consumeAStringToken();
			case "'":
				return this.consumeAStringToken();
			case '(':
			case ')':
			case ',':
			case ':':
			case ';':
			case '[':
			case ']':
			case '{':
			case '}':
				this.nextInputCodePointIndex++;

				return <any>char;
			case '#':
				return this.consumeAHashToken() || this.consumeADelimToken();
			case ' ':
			case '\t':
			case '\n':
			case '\r':
			case '\f':
				return this.consumeAWhitespace();
			case '@':
				return this.consumeAtKeyword() || this.consumeADelimToken();
			// TODO: Only if this is valid escape, otherwise it is a parse error
			case '\\':
				return this.consumeAnIdentLikeToken() || this.consumeADelimToken();
			case '0':
			case '1':
			case '2':
			case '3':
			case '4':
			case '5':
			case '6':
			case '7':
			case '8':
			case '9':
				return this.consumeANumericToken();
			case 'u':
			case 'U':
				if (this.text[this.nextInputCodePointIndex + 1] === '+') {
					const thirdChar = this.text[this.nextInputCodePointIndex + 2];
					if ((thirdChar >= '0' && thirdChar <= '9') || thirdChar === '?') {
						// TODO: Handle unicode stuff such as U+002B
						throw new Error('Unicode tokens not supported!');
					}
				}