//***************************************************************************************
//	BrowserUtil.js - Browser-Specific Functions
//
//	There are 2 main browser specific functions:
//	1. Event passing
//		- Mozilla/Netscape pass their events into the current function (i.e. MouseDown(e))
//		- IE has it's events available in the window (i.e. window.event)
//	2. Event function overrides
//		- Mozilla need explicit function override (document.onmousedown=MouseDown)
//		- IE just needs overrides in tab (onmousedown='MouseDown()')
//
// Copyright (c) 2006, 
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//***************************************************************************************

//***************************************************************************************
//	Constants
//***************************************************************************************

//***************************************************************************************
//	browswer manufacturers and versions
//***************************************************************************************

function BrowserUtil_IsIE()
{
	var Flag=true;
	
	if (BrowserUtil_IsNavigator()) Flag=false;
	
	return(Flag);
}

// for navigator,
//	4 and older do not support layers
//	5 may support layers through the "layer" object but this is not recommended
//	6 and up should support innerHTML

function BrowserUtil_IsNavigator()
{
	var Flag = false;
	
	if (navigator.appName.indexOf("Netscape")>=0) Flag=true;
	
//	return(false);
	return(Flag);
}
function BrowserUtil_IsNavigator4()
{
	var Flag=false;
	
	if (BrowserUtil_IsNavigator())
	{
		if (parseFloat(navigator.appVersion)<5) Flag=true;
	}
	return(Flag);
}
//***************************************************************************************
//	Mouse functions
//***************************************************************************************

function BrowserUtil_KeyCode(e)
//
//	returns ASCII character typed
//
{
	var KeyCode=-1; // indicates a failure
	
	if (BrowserUtil_IsNavigator())
	{
//		alert(e.pageX);
		KeyCode=e.which;
	}
	else
	{
		var Event=window.event;
		
		KeyCode=Event.keyCode;
	}
	
	return(KeyCode);
}
function BrowserUtil_MouseButton(e)
//
//	Returns 1 for left and 3 for right
//
{
	var Button=-1; // indicates a failure
	
	if (BrowserUtil_IsNavigator())
	{
//		alert(e.pageX);
		Button=e.which;
	}
	else
	{
		var Event=window.event;
		
		Button=Event.button;
		
		if (Button==2) Button=3;
	}
	
	return(Button);
}
function BrowserUtil_MouseModifiers(e)
//
//	
//
{
	var Modifiers=0; // no modifiers
	
	if (BrowserUtil_IsNavigator())
	{
		if (e.ctrlKey) Modifiers+=1;
		if (e.shiftKey) Modifiers+=2;
	}
	else
	{
		var Event=window.event;
		
		if (Event.ctrlKey) Modifiers+=1;
		if (Event.shiftKey) Modifiers+=2;
	}
	
	return(Modifiers);
}
function BrowserUtil_MouseX(e)
{
	var mouseX=-1; // indicates a failure
	
	if (BrowserUtil_IsNavigator())
	{
		mouseX=e.pageX;
	}
	else
	{
		var Event=window.event;
		
		mouseX=Event.clientX;
	}

	mouseX+=BrowserUtil_ScrollX(); // add the offset from the body being scrolled
	
	return(mouseX);
}

function BrowserUtil_MouseY(e)
{
	var mouseY=-1; // indicates a failure
	
	if (BrowserUtil_IsNavigator())
	{
		mouseY=e.pageY;
	}
	else
	{
		var Event=window.event;
		
		mouseY=Event.clientY;
	}

	mouseY+=BrowserUtil_ScrollY(); // add the offset from the body being scrolled

	return(mouseY);
}

function BrowserUtil_GetX()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.screenX;
	}
	else
	{
		Result=window.screenLeft;
	}

	return(Result);
}

function BrowserUtil_GetY()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.screenY;
	}
	else
	{
		Result=window.screenTop;
	}

	return(Result);
}

function BrowserUtil_GetContentWidth()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.innerWidth-20; // this is required because FireFox reports 41 less pixels than explorer
	}
	else
	{
		Result=document.body.clientWidth;
	}

	return(Result);
}

function BrowserUtil_GetContentHeight()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.innerHeight;
	}
	else
	{
		Result=document.documentElement.clientHeight;
//		Result=document.body.clientHeight;
	}

	return(Result);
}
/*
function BrowserUtil_HideScrollBars()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		window.scrollbars.visible=0;
	}
	else
	{
//		window.scrollbars="no";
//		window.scrollbars=false;
	}

	return(Result);
}
*/	
function BrowserUtil_ScrollX()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.pageXOffset;
	}
	else
	{
		Result=document.body.scrollLeft;
	}

	return(Result);
}
	
function BrowserUtil_ScrollY()
{
	var Result=0;
	
	if (BrowserUtil_IsNavigator())
	{
		Result=window.pageYOffset;
	}
	else
	{
		Result=document.body.scrollTop;
	}

	return(Result);
}

//***************************************************************************************
//	Miscenaneous functions
//***************************************************************************************
function BrowserUtil_GetCookie(Name)
{
	var Result=null;
	var AllCookies=document.cookie;
//	prompt("AllCookies",AllCookies);
	
	var Position=AllCookies.indexOf(Name+"=");
	
	if (Position!=-1)
	{
		var Start=Position+Name.length+1;
		
		var End=AllCookies.indexOf(';',Start);
		
		if (End==-1) End=AllCookies.length;
		
		var Result=AllCookies.substring(Start,End);
		
		Result=unescape(Result);
		//"window.alert(progress);
	}
//	alert("Cooke Name="+Name+"="+Result);
	
	return(Result);
}

function BrowserUtil_CleanCookie(CookieString)
{
//	alert("CookeString="+CookieString);
	
	var re = /[+]/; // weird syntax for javascript replace function

	for (var i=0;i<10;i++)
	{
		CookieString=CookieString.replace(re," "); // change '+'s to spaces
	}
	return(CookieString);
}

function BrowserUtil_SetCookie(Name,Value)
{
	alert("Name="+Value);
	document.cookie=Name+"="+escape(Value);
//	document.cookie=Name+"="+escape(Value)+"; path=/";
}

//***************************************************************************************
// Utility Functions
//***************************************************************************************
function BrowserUtil_FormatFloat(Value,NumDigits)
{
	var Result=parseFloat(Value);
	var Negative=false;
	
	if (isNaN(Value))
	{
		Result=0;
	}
	else
	{
		if (Value<0)
		{
			Value=-Value;
			Negative=true;
		}
		
		if (Value>10)	
		{
			var Temp=Value;
			var NumTenDigits=0;
			
			while ((Temp>1)&&(NumTenDigits<20))
			{
				NumTenDigits++;
				Temp=Temp/10;
			}
			
			var NumFractionDigits=NumDigits-NumTenDigits;
			
			if (NumFractionDigits>0)
			{
				var Magnitude=Math.pow(10,NumFractionDigits);
				
				Temp=parseInt(Value*Magnitude);
				
				Result=Temp/Magnitude;
			}
			else // no fraction digits, just use the whole portion
			{
				Result=parseInt(Value);
			}
		}
		if (Negative) Result=-Result;
	}
	return(Result);
}
/*
function GetHexString(Value)
{
	var Result=Value.toString(16);
	
	return(Result);
}		
*/
function BrowserUtil_GetHexColorFromDecimalColor(DecimalColor)
{
//		alert("GetHexColorFromDecimalColor() DecimalColor="+DecimalColor);
	
	DecimalColor=DecimalColor.toString();
//		alert("GetHexColorFromDecimalColor() DecimalColor="+DecimalColor);
	
	var Colors=DecimalColor.split(",");
	
	var HexColor="#";
	
	var Sample=parseInt(Colors[0]).toString(16);
	if (Sample.length<2) HexColor=HexColor+"0";
	HexColor=HexColor+Sample;
	
	var Sample=parseInt(Colors[1]).toString(16);
	if (Sample.length<2) HexColor=HexColor+"0";
	HexColor=HexColor+Sample;
	
	var Sample=parseInt(Colors[2]).toString(16);
	if (Sample.length<2) HexColor=HexColor+"0";
	HexColor=HexColor+Sample;
	
//		alert("GetHexColorFromDecimalColor() HexColor="+HexColor);
	return(HexColor);
}

function BrowserUtil_GetDecimalColorFromHexColor(HexColor)
{
//	alert("GetHexColorFromDecimalColor() HexColor="+HexColor);
	
	HexColor=HexColor.toString();
	
	// trip a leading pound sign if needed
	
	if (HexColor.charAt(0)=="#") HexColor=HexColor.substr(1);
	
	var Red=parseInt("0x"+HexColor.substr(0,2));
	var Green=parseInt("0x"+HexColor.substr(2,2));
	var Blue=parseInt("0x"+HexColor.substr(4,2));
	
	var DecimalColor=Red+','+Green+','+Blue;
	
//	alert("GetHexColorFromDecimalColor() DecimalColor="+DecimalColor);
	return(DecimalColor);
}

function BrowserUtil_IsValid(Thing)
{
	var Result=false;
	
	if ((typeof(Thing)!="undefined")&&(Thing!=null)) Result=true;
	
	return(Result);
}

function BrowserUtil_GetStyleFromName(StyleName)
//
// StyleName - the 'SelectorText' for the style (i.e. .Custom, a:link, etc)
// Uncommenting the PanelDebugging functions will dump all styles in the document
//
{
	var Style=null;

//	alert("hi="+document.styleSheets.length);
	
//	alert("NumStyleSheets(document.styleSheets.length)="+document.styleSheets.length);
	
	for (i=0;(i<document.styleSheets.length)&&(Style==null);i++)
	{
//		PanelDebugging_Append(key+"="+document.styleSheets[key]);
		
//		PanelDebugging_Append("Style sheet "+i);

		if (BrowserUtil_IsIE())
		{
//		PanelDebugging_Append("IE");
			var StyleSheet=document.styleSheets[i];
			
			var Rules=StyleSheet["rules"];
			
			for (j=0;(j<Rules.length)&&(Style==null);j++)
			{
				Rule=Rules[j];
				
//				PanelDebugging_Append("Style name="+Rule.selectorText); 
				
				if (Rule.selectorText==StyleName) 
				{
					Style=Rule.style;
//					alert("Found "+Rule.selectorText);
				}
				
				// the style object in the rule object as "style"
			}
		}
		else
		{
//		alert("Not IE");
			var StyleSheet=document.styleSheets[i].cssRules;
			
//			alert(StyleSheet.length);
			for (j=0;j<StyleSheet.length;j++)
			{
				var CSSRule=StyleSheet[j];
				
				if (CSSRule.STYLE_RULE )
				{
//					alert(CSSRule.selectorText);
//					PanelDebugging_Append("Style name="+CSSRule.selectorText);
				
					if (CSSRule.selectorText==StyleName) 
					{
//						alert("Found "+CSSRule.selectorText);
						Style=CSSRule.style;
					}
					
					// the style object in the rule object as "style"
				}
			}
//				PanelDebugging_Append(key2+"="+StyleSheet[key2].CSSStyleDeclaration.background);
		}
	}
	return(Style);
}
//*******************************************************************************
/*
function BrowserUtil_getCookie(cname) 
{
	var name = cname + "=";
	var ca = document.cookie.split(';');
	for(var i=0; i<ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1);
		if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
	}
	return "";
} */
function BrowserUtil_WriteTopLogin(WebsiteID)
{
//	var WebSiteID=BrowserUtil_GetCookie("WebSiteID");
//	alert("WebsiteID: "+WebsiteID+"*");
	var UserID=BrowserUtil_GetCookie("UserID");
//	
	
	if ((UserID=="")||(UserID==null)) // not logged in 
	{
		document.write("<a href='/cwis438/UserManagement/Login.php?WebsiteID="+WebsiteID+
			"&CallingPage=/cwis438/UserManagement/UserProfile.php' id='TopLoginLink'>");
		document.write("Login");
		document.write("</a>");
	
	}
	else // user is logged in
	{
		var Name=BrowserUtil_GetCookie("Name");
		Name=Name.replace("+", " "); 
		//document.write("Welcome "+Name+" ");
		document.write("<a href='/cwis438/UserManagement/Logout.php?WebsiteID="+WebsiteID+
			"' id='TopLoginLink'>");
		document.write("Logout");
		document.write("</a>");
		document.write("&nbsp;&nbsp;&nbsp;");
		document.write(" | ");
		document.write("<a href='/cwis438/UserManagement/UserProfile.php?WebsiteID="+WebsiteID+
			"' id='ProfileLink'>My Profile</a>");
	}
}
function BrowserUtil_WriteTopLoginList(WebsiteID)
{
//	var WebSiteID=BrowserUtil_GetCookie("WebSiteID");
//	alert("WebsiteID: "+WebsiteID+"*");
	var UserID=BrowserUtil_GetCookie("UserID");
//	
	
	if ((UserID=="")||(UserID==null)) // not logged in 
	{
		document.write("<a href='/cwis438/UserManagement/Login.php?WebsiteID="+WebsiteID+
			"&CallingPage=/cwis438/UserManagement/UserProfile.php?WebsiteID="+WebsiteID+"' id='TopLoginLink'>");
		document.write("Login");
		document.write("</a>");
	
	}
	else // user is logged in
	{
		var Name=BrowserUtil_GetCookie("Name");
		Name=Name.replace("+", " "); 
		//document.write("Welcome "+Name+" ");
		document.write("<a href='/cwis438/UserManagement/Logout.php?WebsiteID="+WebsiteID+
			"' id='TopLoginLink'>");
		document.write("Logout");
		document.write("</a>");
		document.write("</li>");
		document.write("<li class=\"nav-item text-center\">");
		document.write("<a href='/cwis438/UserManagement/UserProfile.php?WebsiteID="+WebsiteID+
			"' id='ProfileLink'>My Profile</a>");
	}
}