//
// Controller for the main 511.org navigation menu header
// note: prototype-js required
//
// Reuben Avery (reuben@swirl.net)
// Swirl Integrated Marketing
// February 2008
//

MainNavMenu = Class.create();

MainNavMenu.prototype = {
  initialize: function() {
    console.debug('MainNavMenu initialization');
    
    this.ypMenus = [];
    this.rolloverableImages = [];
    this.rolloveredImages = [];
    
    // 
    // To have an image rollover for any img tag within an ancor tag,
    // simply add a 'rolloversrc' attribute to the img tags 
    
    // Preload rollover images
    $$('a').each( function( el, idx ) {
      try {
        el.getElementsBySelector('img' ).each( function( img, idx ) {
          if ( img.readAttribute('rolloversrc') ) {
            var rolloverableImage = new Image();
            var rolloveredImage = new Image();
            
            rolloverableImage.src = img.readAttribute('src');
            this.rolloverableImages.push( rolloverableImage );
            
            rolloveredImage.src = img.readAttribute('rolloversrc');
            this.rolloveredImages.push( rolloveredImage );
          }
        }, this );
      } catch (ex) { console.warn( 'image preload err:' + ex.message ); }
    }, this );
    

    //
    // Loop through each of the 'MenuBarItem' class divs
    // and attach
    $$('.MenuBarItem').each( function( el, idx ) {
      try {
        if ( el.readAttribute('menuContextId') ) {
          var menuContext = el.readAttribute('menuContextId');
          var menuContainerId = menuContext + 'Container'
          var menuContentId = menuContext + 'Content';
          
          // Default positioning of the menus is flush left and just below the actuator
          var menuXpos = el.cumulativeOffset().left;
          var menuYpos = el.cumulativeOffset().top + el.getHeight();
          var menuWidth = 200;
          var menuHeight = 1000;
          
          // one can specify either 'menuAnchorX' or 'menuAnchorY' attributes in the
          // actuator MenuBarItem div to override
          if ( el.readAttribute('menuAnchorX') ) menuXpos = el.readAttribute('menuAnchorX');
          if ( el.readAttribute('menuAnchorY') ) menuYpos = el.readAttribute('menuAnchorY');
          
          // same for height and width
          if ( el.readAttribute('menuWidth') ) menuWidth = el.readAttribute('menuWidth');
          if ( el.readAttribute('menuHeight') ) menuHeight = el.readAttribute('menuHeight');
          
          $( menuContainerId ).setStyle( { visibility: 'hidden', left: menuXpos+'px', top: menuYpos+'px',  width: menuWidth+'px', height: menuHeight+'px'/*, clip:'rect(0 ' + menuWidth + ' ' + menuHeight + ' 0)'*/ } );
          $( menuContentId ).setStyle( { width: menuWidth+'px', height: menuHeight+'px'/*, clip:'rect(0 ' + menuWidth + ' ' + menuHeight + ' 0)'*/ } );
          
          var ypmenu = new ypSlideOutMenu( menuContext, 'down', menuXpos, menuYpos, menuWidth, menuHeight );
          this.ypMenus.push(ypmenu);
          
          //
          // Attach event hooks to anchors for each menu
          var anchors = el.select('A');
          if ( anchors ) {
            // looping by 'each' although there should only be one..
            anchors.each( function( anchor, idx ) {
              anchor.menuContext = this;
              
              // Attach ypMenu mouseOver/mouseOut event handlers:
              Event.observe( anchor, 'mouseover', function() {
                ypSlideOutMenu.showMenu( this.menuContext );
              });
              Event.observe( anchor, 'mouseout', function() {
                ypSlideOutMenu.hideMenu( this.menuContext );
              });
              
              // establish a relationship between this anchor and its menu
              anchor.ypmenu = ypmenu;
              ypmenu.controlAnchor = anchor;
              
              // deactivate the rollover state of the controlling anchor for this menu
              ypmenu.ondeactivate = function() {
                $( this.controlAnchor ).getElementsBySelector('img').each( function( img, idx ) {
                  if ( img.src_orig ) {
                    img.writeAttribute( { 'src': img.src_orig } );
                  }
                });
              };
              
            }, menuContext );
          } 
          else {
            throw( { message: 'could not latch onto anchor element' } );
          }
          
          console.log( 'attached menu ' + menuContext + ' at ' + menuXpos + ',' + menuYpos );
        } else {
          console.debug( 'menuContextId not found for MenuBarItem, skipping' );
        }
      } catch ( ex ) {
        console.warn('error processing menu ' + el.id + ': ' + ex.message );
      }
    }, this );
    
    $('menuContainers').setStyle( {display:'block'} );
    

    // 
    // To have an image rollover for any img tag within an ancor tag,
    // simply add a 'rolloversrc' attribute to the img tags 
    $$('a').each( function( el, idx ) {
      try {
        el.getElementsBySelector('img' ).each( function( img, idx ) {
          if ( img.readAttribute('rolloversrc') ) {
            Event.observe(this, 'mouseover', function() {
              if (!img.src_orig) img.src_orig = img.readAttribute('src');
              img.writeAttribute( { 'src': img.readAttribute('rolloversrc') } ); 
            });
            
            //
            // If the anchor has a ypmenu attached, let the ypmenu
            // handle resetting the rollover graphic in its 'endSlide' method
            if ( !( 'ypmenu' in el ) ) {
              Event.observe(this, 'mouseout', function() {
                img.writeAttribute( { 'src': img.src_orig } ); 
              });
            }
          }
        }, el );
      } catch (ex) { console.warn( 'rollover err:' + ex.message ); }
    });    

  
  }// end initialize
};



(function() {
  // firebug stubs
  if (!("console" in window) || !("firebug" in console)) {
    this.console = {};
  }
  var cn = [
    "assert", "count", "debug", "dir", "dirxml", "error", "group",
    "groupEnd", "info", "log", "profile", "profileEnd", "time",
    "timeEnd", "trace", "warn"
  ];
  var i=0, tn;
  while(tn=cn[i++]){
    if(!console[tn]){
      console[tn] = function(){};
    }
  }
  
  //
  //
  // Hook up to the Window onLoad handler and add a hook to the Init()
  try {
    var addEvent = function(obj, evType, fn) { 
     if (obj.addEventListener) { 
       obj.addEventListener(evType, fn, false); 
       return true; 
     } else if (obj.attachEvent) { 
       var r = obj.attachEvent("on"+evType, fn); 
       return r; 
     } else { 
       return false; 
     } 
    }
    addEvent( window, 'load', function()  {
        try {
          mainNavMenu = new MainNavMenu();
        } 
        catch (ex) { console.error('(mainNavMenu.js) window.onload error: ' + ex.message); }
     } );
  } catch (ex) { console.error('(mainNavMenu.js) could not hook onto window onload: ' + ex.message); }
  
})();









/*****************************************************
 * ypSlideOutMenu
 * http://ypslideoutmenus.sourceforge.net/
 * 3/04/2001
 * 
 * a nice little script to create exclusive, slide-out
 * menus for ns4, ns6, mozilla, opera, ie4, ie5 on 
 * mac and win32. I've got no linux or unix to test on but 
 * it should(?) work... 
 *
 * Licensed under AFL 2.0
 * http://www.opensource.org/licenses/afl-2.0.php
 *
 * Revised: 
 * - 08/29/2002 : added .hideAll()
 * - 04/15/2004 : added .writeCSS() to support more 
 *                than 30 menus.
 *
 * --youngpup--
 *****************************************************/

ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 250
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
	this.css = "";

	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

		// global reference to this object
		this.gRef = "ypSlideOutMenu_"+id
		eval(this.gRef+"=this")

		// add this menu object to an internal list of all menus
		ypSlideOutMenu.Registry[id] = this

		var d = document

		var strCSS = "";
		strCSS += '#' + this.id + 'Container { visibility:hidden; '
		strCSS += 'left:' + left + 'px; '
		strCSS += 'top:' + top + 'px; '
		strCSS += 'overflow:hidden; z-index:10000; }'
		strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
		strCSS += 'width:' + width + 'px; '
		strCSS += 'height:' + height + 'px; '
		/*strCSS += 'clip:rect(0 ' + width + ' ' + height + ' 0); '*/
		strCSS += '}'

		this.css = strCSS;

		this.load()
	}
}

ypSlideOutMenu.writeCSS = function() {
	document.writeln('<style type="text/css">');

	for (var id in ypSlideOutMenu.Registry) {
		document.writeln(ypSlideOutMenu.Registry[id].css);
	}

	document.writeln('</style>');
}

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

		// close other menus.
		for (menu in reg) if (id != menu) ypSlideOutMenu.hide(menu)

		// if this menu is scheduled to close, cancel it.
		if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }

		// if this menu is closed, open it.
		if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
	}
}

ypSlideOutMenu.hideMenu = function(id)
{
	// schedules the menu to close after <hideDelay> ms, which
	// gives the user time to cancel the action if they accidentally moused out
	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)
	
	// flag that this scheduled event has occured.
	obj.hideTimer = 0

	// if this menu is open, close it.
	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])
}

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