misc.js

define([], function () {

	var isBidiLocale = function (locale) {
		var lang = !locale ? "" : locale.split("-")[0];
		if (!lang || lang.length < 2) {
			return false;
		}
		return ["iw", "he", "ar", "fa", "ur"].some(function (bidiLang) {
			return bidiLang === lang;
		});
	};
	var LRE = "\u202A";
	var RLE = "\u202B";
	var PDF = "\u202C";
	var LRM = "\u200E";
	var RLM = "\u200F";
	var LRO = "\u202D";
	var RLO = "\u202E";

	return {
		LRE: LRE,
		RLE: RLE,
		PDF: PDF,
		LRM: LRM,
		RLM: RLM,
		LRO: LRO,
		RLO: RLO,

		getLocaleDetails: function (locale) {
			if (!locale) {
				locale = typeof navigator === "undefined" ? "" :
					(navigator.language ||
					navigator.userLanguage ||
					"");
			}
			locale = locale.toLowerCase();
			if (isBidiLocale(locale)) {
				var full = locale.split("-");
				return {lang: full[0], country: full[1] ? full[1] : ""};
			}
			return {lang: "not-bidi"};
		},
		
		removeUcc: function (text) {
			if (text) {
				return text.replace(/[\u200E\u200F\u202A-\u202E]/g, "");
			}
			return text;
		},

		getDirection: function (text, dir, guiDir, checkEnd) {
			if (dir !== "auto" && (/^(rtl|ltr)$/i).test(dir)) {
				return dir;
			}
			guiDir = (/^(rtl|ltr)$/i).test(guiDir) ? guiDir : "ltr";
			var txt = !checkEnd ? text : text.split("").reverse().join("");
			var fdc = /[A-Za-z\u05d0-\u065f\u066a-\u06ef\u06fa-\u07ff\ufb1d-\ufdff\ufe70-\ufefc]/.exec(txt);
			return fdc ? (fdc[0] <= "z" ? "ltr" : "rtl") : guiDir;
		},

		hasArabicChar: function (text) {
			var fdc = /[\u0600-\u065f\u066a-\u06ef\u06fa-\u07ff\ufb1d-\ufdff\ufe70-\ufefc]/.exec(text);
			return !!fdc;
		},

		showMarks: function (text, guiDir) { //jshint maxcomplexity: 15
			var result = "";
			for (var i = 0; i < text.length; i++) {
				var c = "" + text.charAt(i);
				switch (c) {
				case LRM:
					result += "<LRM>";
					break;
				case RLM:
					result += "<RLM>";
					break;
				case LRE:
					result += "<LRE>";
					break;
				case RLE:
					result += "<RLE>";
					break;
				case LRO:
					result += "<LRO>";
					break;
				case RLO:
					result += "<RLO>";
					break;
				case PDF:
					result += "<PDF>";
					break;
				default:
					result += c;
				}
			}
			var mark = typeof(guiDir) === "undefined" || !((/^(rtl|ltr)$/i).test(guiDir)) ? "" :
				guiDir === "rtl" ? RLO : LRO;
			return mark + result + (mark === "" ? "" : PDF);
		},

		hideMarks: function (text) {
			var txt = text.replace(/<LRM>/g, LRM).replace(/<RLM>/g, RLM).replace(/<LRE>/g, LRE);
			return txt.replace(/<RLE>/g, RLE).replace(/<LRO>/g, LRO).replace(/<RLO>/g, RLO).replace(/<PDF>/g, PDF);
		}
	};
});