/********************************************************************************
*                        \       ypSlideOutMenus       /
*                         -----------------------------
*   Copyright            : (c) 2002 Aaron Boodman
*   Location             : http://www.youngpup.net/
*                          http://ypslideoutmenus.sourceforge.net/
*
*   Current Version      : 29 August 2002
*********************************************************************************
*  A nice little script to create exclusive, slide-out menus for NS4, NS6,
*  Mozilla, Opera, IE4, IE5 on Mac and Win32.  I don't have Linux or Unix to
*  test on but it should(?) work...
********************************************************************************/



/*document.write('<script src="site/scripts_menu_global.js" type="text/javascript"></script>');*/
/*document.write('<script src="site/scripts_menu_menuLayout.js" type="text/javascript"></script>');*/



ypSlideOutMenu.Registry = [];
ypSlideOutMenu.aniLen = 250;
ypSlideOutMenu.hideDelay = 500;
ypSlideOutMenu.minCPUResolution = 10;

// constructor
function ypSlideOutMenu(id, dir, left, top, width, height) {
	this.ie = document.all ? 1 : 0;
	this.ns4 = document.layers ? 1 : 0;
	this.dom = document.getElementById ? 1 : 0;
	
	if (this.ie || this.ns4 || this.dom) {
		this.id = id;
		this.dir = dir;
		this.orientation = dir == "left" || dir == "right" ? "h" : "v";
		this.dirType = dir == "right" || dir == "down" ? "-" : "+";
		this.dim = this.orientation == "h" ? width : height;
		this.hideTimer = false;
		this.aniTimer = false;
		this.open = false;
		this.over = false;
		this.startTime = 0;
		this.gRef = "ypSlideOutMenu_"+id;
		eval(this.gRef+"=this");
		ypSlideOutMenu.Registry[id] = this;
		var d = document;
		d.write('<style type="text/css">');
		d.write('#' + this.id + 'Container { visibility:hidden; ');
		d.write('left:' + left + 'px; ');
		d.write('top:' + top + 'px; ');
		d.write('overflow:hidden; }');
		d.write('#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; ');
		d.write('width:' + width + 'px; ');
		d.write('height:' + height + 'px; ');
/*		d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ');	*/
		d.write('}');
		d.write('</style>');
		this.load();
	}
}

ypSlideOutMenu.prototype.load = function() {
var d = document;
var lyrId1 = this.id + "Container";
var lyrId2 = this.id + "Content";
var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1];
if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2);
var temp;
	if (!obj1 || !obj2) {
		window.setTimeout(this.gRef + ".load()", 100);
	} else {
		this.container = obj1;
		this.menu = obj2;
		this.style = this.ns4 ? this.menu : this.menu.style;
		this.homePos = eval("0" + this.dirType + this.dim);
		this.outPos = 0;
		this.accelConst = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen;
		// set event handlers.
		if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
		this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')");
		this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "')");
		//set initial state
		this.endSlide();
	}
}

ypSlideOutMenu.showMenu = function(id) {
	var reg = ypSlideOutMenu.Registry;
	var obj = ypSlideOutMenu.Registry[id];
	
	if (obj.container) {
		obj.over = true;
		for (menu in reg) if (id != menu) ypSlideOutMenu.hide(menu);
		if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer);
		}
		if (!obj.open && !obj.aniTimer) reg[id].startSlide(true);
	}
}

ypSlideOutMenu.hideMenu = function(id) {
	var obj = ypSlideOutMenu.Registry[id];
	if (obj.container) {
		if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
		obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
	}
}

ypSlideOutMenu.hideAll = function() {
	var reg = ypSlideOutMenu.Registry;
	
	for (menu in reg) {
		ypSlideOutMenu.hide(menu);
		if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
	}
}

ypSlideOutMenu.hide = function(id) {
	var obj = ypSlideOutMenu.Registry[id];
	obj.over = false;
	if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
	obj.hideTimer = 0;
	if (obj.open && !obj.aniTimer) obj.startSlide(false);
}

ypSlideOutMenu.prototype.startSlide = function(open) {
	this[open ? "onactivate" : "ondeactivate"]();
	this.open = open;
	if (open) this.setVisibility(true);
	this.startTime = (new Date()).getTime();
	this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution);
}

ypSlideOutMenu.prototype.slide = function() {
	var elapsed = (new Date()).getTime() - this.startTime;
	if (elapsed > ypSlideOutMenu.aniLen) this.endSlide();
	else {
		var d = Math.round(Math.pow(ypSlideOutMenu.aniLen-elapsed, 2) * this.accelConst);
		if (this.open && this.dirType == "-") d = -d;
		else if (this.open && this.dirType == "+") d = -d;
		else if (!this.open && this.dirType == "-") d = -this.dim + d;
		else d = this.dim + d;
		this.moveTo(d);
	}
}

ypSlideOutMenu.prototype.endSlide = function() {
	this.aniTimer = window.clearTimeout(this.aniTimer);
	this.moveTo(this.open ? this.outPos : this.homePos);
	if (!this.open) this.setVisibility(false);
	if ((this.open && !this.over) || (!this.open && this.over)) {
		this.startSlide(this.over);
	}
}

ypSlideOutMenu.prototype.setVisibility = function(bShow) { 
	var s = this.ns4 ? this.container : this.container.style;
	s.visibility = bShow ? "visible" : "hidden";
}

ypSlideOutMenu.prototype.moveTo = function(p) { 
	this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px";
}

ypSlideOutMenu.prototype.getPos = function(c) {
	return parseInt(this.style[c]);
}

ypSlideOutMenu.prototype.onactivate = function() { }
ypSlideOutMenu.prototype.ondeactivate = function() { }

/**
 * Build menu HTML from a JS data structure
 * HTML output is customizable with simple templates
 * Initializes ypSlideoutMenu objects
 * Assigns proper event handlers to "triggers", so 
 * you don't have to do it in the HTML
 *
 * @todo resize handler
 * @todo better netscape 4 DOM support
 * 
 */
function menuObject(menuData) {
	
	this.menuData = (menuData) ? menuData : {}; // js object representing a set of menus
	this.htmlText = ''; // stores html representation of menuData

	// html templates
	this.tmpl = {}
	this.tmpl.container = '<div class="ypMenu"><div id="%sContainer"><div id="%sContent"><div class="ypMenuBorderTop"><div class="ypMenuBorder"><div class="ypMenuBG"><ul>%s</ul></div></div></div></div></div></div>';
	this.tmpl.content   = '%s';
	this.tmpl.link      = '<li id="%s"><a href="%s" title="%s">%s</a></li>';
	this.tmpl.sep       = '<hr />';
	this.tmpl.heading   = '<p class="ypMenuHeading">%s</p>';
		
	// methods
	this.isSupported = isSupported;
	this.initMenus = initMenus;
	this.buildMenuHTML = buildMenuHTML;
	this.initMenuObj = initMenuObj;
	this.assignMenuHandlers = assignMenuHandlers;
	this.assignNoMenuHandler = assignNoMenuHandler;
	this.writeMenus = writeMenus;
	this.setTemplate = setTemplate;
	this.getTemplate = getTemplate;
	this.renderContainer = renderContainer;
	this.renderContent = renderContent;
	this.renderLink = renderLink;
	this.renderSep = renderSep;
	this.renderHeading = renderHeading;
	this.merge = merge;
}

function isSupported() {
	return true;
}

function initMenus() {
	var menus = this.menuData.menus
	for (menuId in menus) {
		var triggerId  = menus[menuId].trigger;
		var offsetX    = menus[menuId].offsetX;
		var offsetY    = menus[menuId].offsetY;
		var height     = menus[menuId].height;
		var width      = menus[menuId].width;
		var direction  = menus[menuId].direction;
		var items      = menus[menuId].items;
		
		// init yp menu objects for this menu
		this.initMenuObj(triggerId, offsetX, offsetY, height, width, direction);
		
		// assign the hide/show event handlers to the menu's trigger element
		this.assignMenuHandlers(menuId, triggerId);
		
		// assign window resize function
		/*assignResizeHandler()*/
		
		// build html for this menu
		this.htmlText += this.buildMenuHTML(menuId, items);
	}
	
	// assign "nomenu" handlers, if any
	if (this.menuData.nomenus) {
		for (var i = 0; i < this.menuData.nomenus.length; i++) {
			assignNoMenuHandler(this.menuData.nomenus[i]);
		}
	}
}

function buildMenuHTML(menuId, items) {
	var menuText = ''
	for (var i = 0; i < items.length; i++) {
		var type = items[i].type;
		var fnName = 'render' + type.substr(0,1).toUpperCase() + type.substr(1);
		if (typeof this[fnName] != 'undefined') {
			menuText += this[fnName](items[i]);
		}
	}
	menuText = this.renderContent(menuId, menuText);
	menuText = this.renderContainer(menuId, menuText);
	return menuText;
}

function initMenuObj(triggerId, offsetX, offsetY, height, width, direction) {
	triggerElm = xbGetElementById(triggerId);
	if (triggerElm) {
		initTop    = xbGetElementPageY(triggerElm) + offsetY;
		initLeft   = xbGetElementPageX(triggerElm) + offsetX;
		xbGetElementPageY(triggerElm);
		new ypSlideOutMenu(menuId, direction, initLeft, initTop, width, height);
	}
}

function assignMenuHandlers(menuId, triggerId) {
	var triggerElm = xbGetElementById(triggerId);
	if (triggerElm) {
		var mouseOver = new Function('ypSlideOutMenu.showMenu(\'' + menuId + '\')');
		var mouseOut = new Function('ypSlideOutMenu.hideMenu(\'' + menuId + '\')');
		xbAddEventListener(triggerElm, 'mouseover', mouseOver);
		xbAddEventListener(triggerElm, 'mouseout', mouseOut);
	}
}

function assignNoMenuHandler(triggerId) {
	var triggerElm = xbGetElementById(triggerId);
	if (triggerElm) {
		xbAddEventListener(triggerElm, 'mouseover', ypSlideOutMenu.hideAll);
	}
}

function writeMenus() {
	if ( this.isSupported() ) {
		this.initMenus();
		document.write(this.htmlText);
	}
}

function getTemplate(name) {
	return this.tmpl.name;
}

function setTemplate(name, s) {
	this.tmpl.name = s;
}

function renderContainer(id, content) {
	return this.merge(this.tmpl.container, id, id, content);
}

function renderContent(id, content) {
	return this.merge(this.tmpl.content, content);
}

function renderLink(item) {
	return this.merge(this.tmpl.link, item.id, item.href, (item.title) ? item.title : '', item.text);
}

function renderSep() {
	return this.tmpl.sep;
}

function renderHeading(item) {
	return this.merge(this.tmpl.heading, item.text);
}

function merge(tmpl) {
	var args = merge.arguments;
	for (var i = 1; i < args.length; i++) {
		ix = tmpl.indexOf('%s');
		if (ix != -1) {
			start = tmpl.substring(0, ix);
			end = tmpl.substring(ix+2, tmpl.length);
			tmpl = start + args[i] + end;
		}
		else {
			break;
		}
	}
	return tmpl;
}