//
// www.calcoolate.com javaScript calculator
//
// Copyright (c) 2006. All rights reserved
//

//
// preferences management
//
var preferencesCookie = "calcPref";
var prefs = {saveHistory:true,saveConvertHistory:true,angle:'rad' }

function loadPreferences()
{
	var pairs = new Array();

	var cookie = readCookie(preferencesCookie);
	while (cookie != null && cookie.indexOf("=")>=0) {
		var valueIndex = cookie.indexOf("=");
		var nextSettingIndex = cookie.indexOf("//");
		var setting = cookie.substring(0, valueIndex);
		if (nextSettingIndex != -1) {
			var value = cookie.substring(valueIndex+1, nextSettingIndex);
			cookie = cookie.substring(nextSettingIndex+2);
		} else {
			var value = cookie.substring(valueIndex+1);
			cookie = "";
		}
		var pair = new Object();
		pair.setting = setting;
		pair.value = value;
		pairs[pairs.length] = pair;
	}

	for (var i=0; i < pairs.length; i++)
	{
		var pair = pairs[i]
		if (pair.setting == "saveHistory")
		{
			if (pair.value == "true")
				prefs.saveHistory = true;
			else
				prefs.saveHistory = false;
		} else if (pair.setting == "saveConvertHistory")
		{
			if (pair.value == "true")
				prefs.saveConvertHistory = true;
			else
				prefs.saveConvertHistory = false;
		} else if (pair.setting=="angle") {
			prefs.angle=pair.value;
		}
	}
}

function savePreferencesCookie()
{
	var cookieVal = "";

	if (prefs.saveHistory == true)
		cookieVal += "saveHistory=true//";
	else
		cookieVal += "saveHistory=false//";

	if (prefs.saveConvertHistory == true)
		cookieVal += "saveConvertHistory=true//";
	else
		cookieVal += "saveConvertHistory=false//";

	cookieVal += "angle="+prefs.angle+"//";

	// save it

	createCookie(preferencesCookie, cookieVal, 365*10)
}