EntityParser.consumeEntity = function()

in src-noconflict/worker-html.js [1640:1736]

• 97 lines of code
• 35 McCabe index (conditional complexity)

EntityParser.consumeEntity = function(buffer, tokenizer, additionalAllowedCharacter) {
	var decodedCharacter = '';
	var consumedCharacters = '';
	var ch = buffer.char();
	if (ch === InputStream.EOF)
		return false;
	consumedCharacters += ch;
	if (ch == '\t' || ch == '\n' || ch == '\v' || ch == ' ' || ch == '<' || ch == '&') {
		buffer.unget(consumedCharacters);
		return false;
	}
	if (additionalAllowedCharacter === ch) {
		buffer.unget(consumedCharacters);
		return false;
	}
	if (ch == '#') {
		ch = buffer.shift(1);
		if (ch === InputStream.EOF) {
			tokenizer._parseError("expected-numeric-entity-but-got-eof");
			buffer.unget(consumedCharacters);
			return false;
		}
		consumedCharacters += ch;
		var radix = 10;
		var isDigit = isDecimalDigit;
		if (ch == 'x' || ch == 'X') {
			radix = 16;
			isDigit = isHexDigit;
			ch = buffer.shift(1);
			if (ch === InputStream.EOF) {
				tokenizer._parseError("expected-numeric-entity-but-got-eof");
				buffer.unget(consumedCharacters);
				return false;
			}
			consumedCharacters += ch;
		}
		if (isDigit(ch)) {
			var code = '';
			while (ch !== InputStream.EOF && isDigit(ch)) {
				code += ch;
				ch = buffer.char();
			}
			code = parseInt(code, radix);
			var replacement = this.replaceEntityNumbers(code);
			if (replacement) {
				tokenizer._parseError("invalid-numeric-entity-replaced");
				code = replacement;
			}
			if (code > 0xFFFF && code <= 0x10FFFF) {
		        code -= 0x10000;
		        var first = ((0xffc00 & code) >> 10) + 0xD800;
		        var second = (0x3ff & code) + 0xDC00;
				decodedCharacter = String.fromCharCode(first, second);
			} else
				decodedCharacter = String.fromCharCode(code);
			if (ch !== ';') {
				tokenizer._parseError("numeric-entity-without-semicolon");
				buffer.unget(ch);
			}
			return decodedCharacter;
		}
		buffer.unget(consumedCharacters);
		tokenizer._parseError("expected-numeric-entity");
		return false;
	}
	if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
		var mostRecentMatch = '';
		while (namedEntityPrefixes[consumedCharacters]) {
			if (entities[consumedCharacters]) {
				mostRecentMatch = consumedCharacters;
			}
			if (ch == ';')
				break;
			ch = buffer.char();
			if (ch === InputStream.EOF)
				break;
			consumedCharacters += ch;
		}
		if (!mostRecentMatch) {
			tokenizer._parseError("expected-named-entity");
			buffer.unget(consumedCharacters);
			return false;
		}
		decodedCharacter = entities[mostRecentMatch];
		if (ch === ';' || !additionalAllowedCharacter || !(isAlphaNumeric(ch) || ch === '=')) {
			if (consumedCharacters.length > mostRecentMatch.length) {
				buffer.unget(consumedCharacters.substring(mostRecentMatch.length));
			}
			if (ch !== ';') {
				tokenizer._parseError("named-entity-without-semicolon");
			}
			return decodedCharacter;
		}
		buffer.unget(consumedCharacters);
		return false;
	}
};