dynatrace-cordova-outsystems-plugin/node_modules/cssom/lib/CSSValueExpression.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

//.CommonJS
var CSSOM = {
	CSSValue: require('./CSSValue').CSSValue
};
///CommonJS


/**
 * @constructor
 * @see http://msdn.microsoft.com/en-us/library/ms537634(v=vs.85).aspx
 *
 */
CSSOM.CSSValueExpression = function CSSValueExpression(token, idx) {
	this._token = token;
	this._idx = idx;
};

CSSOM.CSSValueExpression.prototype = new CSSOM.CSSValue();
CSSOM.CSSValueExpression.prototype.constructor = CSSOM.CSSValueExpression;

/**
 * parse css expression() value
 *
 * @return {Object}
 *         - error:
 *         or
 *         - idx:
 *         - expression:
 *
 * Example:
 *
 * .selector {
 *		zoom: expression(documentElement.clientWidth > 1000 ? '1000px' : 'auto');
 * }
 */
CSSOM.CSSValueExpression.prototype.parse = function() {
	var token = this._token,
			idx = this._idx;

	var character = '',
			expression = '',
			error = '',
			info,
			paren = [];


	for (; ; ++idx) {
		character = token.charAt(idx);

		// end of token
		if (character === '') {
			error = 'css expression error: unfinished expression!';
			break;
		}

		switch(character) {
			case '(':
				paren.push(character);
				expression += character;
				break;

			case ')':
				paren.pop(character);
				expression += character;
				break;

			case '/':
				if ((info = this._parseJSComment(token, idx))) { // comment?
					if (info.error) {
						error = 'css expression error: unfinished comment in expression!';
					} else {
						idx = info.idx;
						// ignore the comment
					}
				} else if ((info = this._parseJSRexExp(token, idx))) { // regexp
					idx = info.idx;
					expression += info.text;
				} else { // other
					expression += character;
				}
				break;

			case "'":
			case '"':
				info = this._parseJSString(token, idx, character);
				if (info) { // string
					idx = info.idx;
					expression += info.text;
				} else {
					expression += character;
				}
				break;

			default:
				expression += character;
				break;
		}

		if (error) {
			break;
		}

		// end of expression
		if (paren.length === 0) {
			break;
		}
	}

	var ret;
	if (error) {
		ret = {
			error: error
		};
	} else {
		ret = {
			idx: idx,
			expression: expression
		};
	}

	return ret;
};


/**
 *
 * @return {Object|false}
 *          - idx:
 *          - text:
 *          or
 *          - error:
 *          or
 *          false
 *
 */
CSSOM.CSSValueExpression.prototype._parseJSComment = function(token, idx) {
	var nextChar = token.charAt(idx + 1),
			text;

	if (nextChar === '/' || nextChar === '*') {
		var startIdx = idx,
				endIdx,
				commentEndChar;

		if (nextChar === '/') { // line comment
			commentEndChar = '\n';
		} else if (nextChar === '*') { // block comment
			commentEndChar = '*/';
		}

		endIdx = token.indexOf(commentEndChar, startIdx + 1 + 1);
		if (endIdx !== -1) {
			endIdx = endIdx + commentEndChar.length - 1;
			text = token.substring(idx, endIdx + 1);
			return {
				idx: endIdx,
				text: text
			};
		} else {
			var error = 'css expression error: unfinished comment in expression!';
			return {
				error: error
			};
		}
	} else {
		return false;
	}
};


/**
 *
 * @return {Object|false}
 *					- idx:
 *					- text:
 *					or 
 *					false
 *
 */
CSSOM.CSSValueExpression.prototype._parseJSString = function(token, idx, sep) {
	var endIdx = this._findMatchedIdx(token, idx, sep),
			text;

	if (endIdx === -1) {
		return false;
	} else {
		text = token.substring(idx, endIdx + sep.length);

		return {
			idx: endIdx,
			text: text
		};
	}
};


/**
 * parse regexp in css expression
 *
 * @return {Object|false}
 *				- idx:
 *				- regExp:
 *				or 
 *				false
 */

/*

all legal RegExp
 
/a/
(/a/)
[/a/]
[12, /a/]

!/a/

+/a/
-/a/
* /a/
/ /a/
%/a/

===/a/
!==/a/
==/a/
!=/a/
>/a/
>=/a/
</a/
<=/a/

&/a/
|/a/
^/a/
~/a/
<</a/
>>/a/
>>>/a/

&&/a/
||/a/
?/a/
=/a/
,/a/

		delete /a/
				in /a/
instanceof /a/
				new /a/
		typeof /a/
			void /a/

*/
CSSOM.CSSValueExpression.prototype._parseJSRexExp = function(token, idx) {
	var before = token.substring(0, idx).replace(/\s+$/, ""),
			legalRegx = [
				/^$/,
				/\($/,
				/\[$/,
				/\!$/,
				/\+$/,
				/\-$/,
				/\*$/,
				/\/\s+/,
				/\%$/,
				/\=$/,
				/\>$/,
				/<$/,
				/\&$/,
				/\|$/,
				/\^$/,
				/\~$/,
				/\?$/,
				/\,$/,
				/delete$/,
				/in$/,
				/instanceof$/,
				/new$/,
				/typeof$/,
				/void$/
			];

	var isLegal = legalRegx.some(function(reg) {
		return reg.test(before);
	});

	if (!isLegal) {
		return false;
	} else {
		var sep = '/';

		// same logic as string
		return this._parseJSString(token, idx, sep);
	}
};


/**
 *
 * find next sep(same line) index in `token`
 *
 * @return {Number}
 *
 */
CSSOM.CSSValueExpression.prototype._findMatchedIdx = function(token, idx, sep) {
	var startIdx = idx,
			endIdx;

	var NOT_FOUND = -1;

	while(true) {
		endIdx = token.indexOf(sep, startIdx + 1);

		if (endIdx === -1) { // not found
			endIdx = NOT_FOUND;
			break;
		} else {
			var text = token.substring(idx + 1, endIdx),
					matched = text.match(/\\+$/);
			if (!matched || matched[0] % 2 === 0) { // not escaped
				break;
			} else {
				startIdx = endIdx;
			}
		}
	}

	// boundary must be in the same line(js sting or regexp)
	var nextNewLineIdx = token.indexOf('\n', idx + 1);
	if (nextNewLineIdx < endIdx) {
		endIdx = NOT_FOUND;
	}


	return endIdx;
};




//.CommonJS
exports.CSSValueExpression = CSSOM.CSSValueExpression;
///CommonJS