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Edit File: parseValues.js

"use strict";

var Parser = require("fastparse");

function commentMatch(match, content) {
	this.value.nodes.push({
		type: "comment",
		content: content
	});
}

function spacingMatch(match) {
	var item = this.value.nodes[this.value.nodes.length - 1];
	item.after = (item.after || "") + match;
}

function initialSpacingMatch(match) {
	this.value.before = match;
}

function endSpacingMatch(match) {
	this.value.after = match;
}

function unescapeString(content) {
	return content.replace(/\\(?:([a-fA-F0-9]{1,6})|(.))/g, function(all, unicode, otherCharacter) {
		if (otherCharacter) {
			return otherCharacter;
		}

var C = parseInt(unicode, 16);
		if(C < 0x10000) {
			return String.fromCharCode(C);
		} else {
			return String.fromCharCode(Math.floor((C - 0x10000) / 0x400) + 0xD800) +
				String.fromCharCode((C - 0x10000) % 0x400 + 0xDC00);
		}
	});
}

function stringMatch(match, content) {
	var value = unescapeString(content);
	this.value.nodes.push({
		type: "string",
		value: value,
		stringType: match[0]
	});
}

function commaMatch(match, spacing) {
	var newValue = {
		type: "value",
		nodes: []
	};
	if(spacing) {
		newValue.before = spacing;
	}
	this.root.nodes.push(newValue);
	this.value = newValue;
}

function itemMatch(match) {
	this.value.nodes.push({
		type: "item",
		name: match
	});
}

var parser = new Parser({
	decl: {
		"^\\s+": initialSpacingMatch,
		"/\\*([\\s\\S]*?)\\*/": commentMatch,
		"\"((?:[^\\\\\"]|\\\\.)*)\"": stringMatch,
		"'((?:[^\\\\']|\\\\.)*)'": stringMatch,
		"url\$(\\s*)(\"(?:[^\\\\\"]|\\\\.)*\")(\\s*)\$": urlMatch,
		"url\$(\\s*)('(?:[^\\\\']|\\\\.)*')(\\s*)\$": urlMatch,
		"url\$(\\s*)((?:[^\\\$'\"]|\\\\.)*)(\\s*)\\)": urlMatch,
		"([\\w-]+)\$(\\s*)": nestedItemMatch,
		"(\\s*)(\$)": nestedItemEndMatch,
		",(\\s*)": commaMatch,
		"\\s+$": endSpacingMatch,
		"\\s+": spacingMatch,
		"[^\\s,)]+": itemMatch
	}
});

module.exports = parseValues;

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