/*
 ModalBox - The pop-up window thingie with AJAX, based on prototype and script.aculo.us.

 Copyright Andrey Okonetchnikov (andrej.okonetschnikow@gmail.com), 2006
 All rights reserved.
 
 VERSION 1.5.3
 Last Modified: 04/21/2007

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 * Neither the name of the Andrey Okonetchnikov nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

* http://www.opensource.org/licenses/bsd-license.php
 
See scriptaculous.js for full scriptaculous licence

*/

if (!window.Modalbox)
	var Modalbox = new Object();

Modalbox.Methods = {
	focusableElements: new Array,
	
	setOptions: function(options) {
		this.options = {
			overlayClose: true, // Close modal box by clicking on overlay
			width: 400, // Default width in px
			height: 400, // Default height in px
			overlayDuration: .5, // Default overlay fade in/out duration in seconds
			slideDownDuration: .2, // .75 Default Modalbox appear slide down effect in seconds
			slideUpDuration: .2, // Default Modalbox hiding slide up effect in seconds
			resizeDuration: .50, // Default resize duration seconds
			loadingString: "Kérjük, várjon...", // Default loading string message
			closeString: "Bezár", // Default title attribute for close window link
			closeImg: "/design/js/modalbox/close.gif",
			loadingImg: "/design/js/modalbox/loading_fekete.gif",
			params: {},
			method: 'get' // Default Ajax request method
		};
		Object.extend(this.options, options || {});
	},
	
	_init: function() {
		//Create the overlay
		this.MBoverlay = Builder.node("div", { id: "MB_overlay" });
		//Create the window
		this.MBwindow = Builder.node("div", {id: "MB_window", style: "display: none"}, [
			this.MBframe = Builder.node("div", {id: "MB_frame"}, [
				this.MBheader = Builder.node("div", {id: "MB_header"}, [
					this.MBcaption = Builder.node("div", {id: "MB_caption"}),
					this.MBclose = Builder.node("a", {id: "MB_close", title: this.options.closeString, href: "#"}, [
						Builder.build("<img src='"+this.options.closeImg+"' />"),
					]),
				]),
				this.MBcontent = Builder.node("div", {id: "MB_content"}, [
					this.MBloading = Builder.node("div", {id: "MB_loading"}, [
						Builder.build("<img src='"+this.options.loadingImg+"' />"),
					]),
				]),
			]),
		]);
		// Inserting into DOM
		document.body.insertBefore(this.MBwindow, document.body.childNodes[0]);
		document.body.insertBefore(this.MBoverlay, document.body.childNodes[0]);
		//Adding event observers
		this.hide = this.hide.bindAsEventListener(this);
		this.close = this._hide.bindAsEventListener(this);
		
		// Initial scrolling position of the window. To be used for remove scrolling effect during ModalBox appearing
		this.initScrollX = window.pageXOffset || document.body.scrollLeft || document.documentElement.scrollLeft;
		this.initScrollY = window.pageYOffset || document.body.scrollTop || document.documentElement.scrollTop;
		
		Event.observe(this.MBclose, "click", this.close); // Close link overver
		if(this.options.overlayClose) Event.observe(this.MBoverlay, "click", this.hide); // Overlay close obersver

		this.isInitialized = true; // Mark as initialized
	},
	
	show: function(title, url, options) {
		this.title = title;
		this.url = url;
		this.setOptions(options);
		if(!this.isInitialized) this._init(); // Check for is already initialized
		Element.update(this.MBcaption, title); // Updating title of the MB
		
		if(this.MBwindow.style.display == "none") { // First modal box appearing
			this._appear();
			this.event("onShow"); // Passing onShow callback
		}
		else { // If MB already on the screen, update it
			this._update();
			this.event("onUpdate"); // Passing onShow callback
		} 
	},
	
	hide: function(options) { // External hide method to use from external HTML and JS
		if(options) Object.extend(this.options, options); // Passing callbacks
		Effect.Fade(this.MBwindow, { duration: this.options.slideUpDuration, afterFinish: this._deinit.bind(this) } );
		//Effect.SlideUp(this.MBwindow, { duration: this.options.slideUpDuration, afterFinish: this._deinit.bind(this) } );
		//Effect.SwitchOff(this.MBwindow, { afterFinish: this._deinit.bind(this) } );
	},
	
	_hide: function(event) { // Internal hide method to use inside MB class
		if(event) Event.stop(event);
		this.hide();
	},
	
	_appear: function() { // First appearing of MB
		this._toggleSelects();
		this._setOverlay();
		this._setWidth();
		this._setPosition();
		new Effect.Fade(this.MBoverlay, {
				from: 0, 
				to: 0.75, 
				duration: this.options.overlayDuration, 
				afterFinish: function() {
					new Effect.Appear(this.MBwindow, {    // SlideDown
						duration: this.options.slideDownDuration, 
						afterFinish: function(){ 
							this._setPosition(); 
							this.loadContent();
						}.bind(this)
					});
				}.bind(this)
		});
		
		this._setWidthAndPosition = this._setWidthAndPosition.bindAsEventListener(this);
		Event.observe(window, "resize", this._setWidthAndPosition);
		
		this.kbdHandler = this.kbdHandler.bindAsEventListener(this);
		Event.observe(document, "keypress", this.kbdHandler);
	},
	
	resize: function(byWidth, byHeight, options) { // Change size of MB without loading content
		if(options) Object.extend(this.options, options); // Passing callbacks
		this.currentDims = [this.MBwindow.offsetWidth, this.MBwindow.offsetHeight];
		new Effect.ScaleBy(this.MBwindow, 
			(byWidth), //New width calculation
			(byHeight), //New height calculation
			{ duration: this.options.resizeDuration, 
			  afterFinish: function() { this.event("afterResize") }.bind(this) // Passing callback
			});
	},
	
	_update: function() { // Updating MB in case of wizards
		this.currentDims = [this.MBwindow.offsetWidth, this.MBwindow.offsetHeight];
		if((this.options.width + 10 != this.currentDims[0]) || (this.options.height + 5 != this.currentDims[1]))
			new Effect.ScaleBy(this.MBwindow, 
				(this.options.width + 10 - this.currentDims[0]), //New width calculation
				(this.options.height + 5 - this.currentDims[1]), //New height calculation
			{
				duration: this.options.resizeDuration, 
				afterFinish: this._loadAfterResize.bind(this), 
				beforeStart: function(effect) { 
					Element.update(this.MBcontent, "");
					this.MBcontent.appendChild(this.MBloading);
					Element.update(this.MBloading, this.options.loadingString);
				}.bind(this) 
			});
		else {
			Element.update(this.MBcontent, "");
			this.MBcontent.appendChild(this.MBloading);
			Element.update(this.MBloading, this.options.loadingString);
			this._loadAfterResize();
		}
	},
	
	loadContent: function () { // Load content into MB through AJAX
		if(this.event("beforeLoad") != false) // If callback passed false, skip loading of the content
			new Ajax.Request( this.url, { method: this.options.method.toLowerCase(), parameters: this.options.params, 
				onComplete: function(transport) {
					var response = new String(transport.responseText);
					this.MBcontent.innerHTML = response;
					this.focusableElements = this._findFocusableElements();
					this._moveFocus(); // Setting focus on first 'focusable' element in content (input, select, textarea, link or button)
					this.event("afterLoad"); // Passing callback
					response.extractScripts().map(function(script) { 
						return eval(script.replace("<!--", "").replace("// -->", ""));
					}).bind(window);
				}.bind(this)
			});
	},
	
	_loadAfterResize: function() {
		this._setWidth();
		this._setPosition();
		this.loadContent();
	},
	
	_moveFocus: function() { // Setting focus to be looped inside current MB
		if(this.focusableElements.length > 0)
			this.focusableElements.first().focus(); // Focus on first focusable element except close button
		else
			$("MB_close").focus(); // If no focusable elements exist focus on close button
	},
	
	_findFocusableElements: function(){ // Collect form elements or links from MB content
		return $A($("MB_content").descendants()).findAll(function(node){
			return (["INPUT", "TEXTAREA", "SELECT", "A", "BUTTON"].include(node.tagName));
		});
	},
	
	kbdHandler: function(e) {
		var node = Event.element(e);
		switch(e.keyCode) {
			case Event.KEY_TAB:
				if(Event.element(e) == this.focusableElements.last()) {
					Event.stop(e);
					this._moveFocus();  // Find last element in MB to handle event on it. If no elements found, uses close ModalBox button
				}
			break;			
			case Event.KEY_ESC:
				this._hide(e);
			break;
			case 32:
				this._preventScroll(e);
			break;
			case 0: // For Gecko browsers compatibility
				if(e.which == 32) this._preventScroll(e);
			break;
			case Event.KEY_UP:
			case Event.KEY_DOWN:
			case Event.KEY_PAGEDOWN:
			case Event.KEY_PAGEUP:
			case Event.KEY_HOME:
			case Event.KEY_END:
				if(!["TEXTAREA", "SELECT"].include(node.tagName) || 
				(node.tagName == "INPUT" && (node.type == "submit" || node.type == "button")) ) Event.stop(e);
			break;
		}
	},
	
	_preventScroll: function(event) { // Disabling scrolling by "space" key
		if(!["INPUT", "TEXTAREA", "SELECT", "BUTTON"].include(Event.element(event).tagName)) Event.stop(event);
	},
	
	_deinit: function()
	{	
		this._toggleSelects(); // Toggle back 'select' element in IE
		Event.stopObserving(this.MBclose, "click", this.close );
		if(this.options.overlayClose)
			Event.stopObserving(this.MBoverlay, "click", this.hide );
		Event.stopObserving(window, "resize", this._setWidthAndPosition );
		Event.stopObserving(document, "keypress", this.kbdHandler );
		Effect.toggle(this.MBoverlay, 'appear', {duration: this.options.overlayDuration, afterFinish: this._removeElements.bind(this) });
	},
	
	_removeElements: function () {
		if (navigator.appVersion.match(/\bMSIE\b/)) {
			this._prepareIE("", ""); // If set to auto MSIE will show horizontal scrolling
			window.scrollTo(this.initScrollX, this.initScrollY);
		}
		Element.remove(this.MBoverlay);
		Element.remove(this.MBwindow);
		this.isInitialized = false;
		this.event("afterHide"); // Passing afterHide callback
	},
	
	_setOverlay: function () {
		if (navigator.appVersion.match(/\bMSIE\b/)) {
			//this._prepareIE("100%", "hidden");
			//if (!navigator.appVersion.match(/\b7.0\b/)) window.scrollTo(0,0); // Disable scrolling on top for IE7
		}
	},
	
	_setWidth: function () { //Set size
		this.MBwindow.style.width = this.options.width + "px";
		this.MBwindow.style.height = this.options.height + "px";
	},
	
	_setPosition: function () {
		this.MBwindow.style.left = Math.round((Element.getWidth(document.body) - Element.getWidth(this.MBwindow)) / 2 ) + "px";
	},
	
	_setWidthAndPosition: function () {
		this._setWidth();
		this._setPosition();
	},
	
	_getScrollTop: function () { //From: http://www.quirksmode.org/js/doctypes.html
		var theTop;
		if (document.documentElement && document.documentElement.scrollTop)
			theTop = document.documentElement.scrollTop;
		else if (document.body)
			theTop = document.body.scrollTop;
		return theTop;
	},
	// For IE browsers -- IE requires height to 100% and overflow hidden (taken from lightbox)
	_prepareIE: function(height, overflow){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow; 
	},
	// For IE browsers -- hiding all SELECT elements
	_toggleSelects: function() {
		if (navigator.appVersion.match(/\bMSIE\b/))
			$$("select").each( function(select) { 
				select.style.visibility = (select.style.visibility == "") ? "hidden" : "";
			});
	},
	event: function(eventName) {
		if(this.options[eventName]) {
			var returnValue = this.options[eventName](); // Executing callback
			this.options[eventName] = null; // Removing callback after execution
			if(returnValue != undefined) 
				return returnValue;
			else 
				return true;
		}
		return true;
	}
}

Object.extend(Modalbox, Modalbox.Methods);

Effect.ScaleBy = Class.create();
Object.extend(Object.extend(Effect.ScaleBy.prototype, Effect.Base.prototype), {
  initialize: function(element, byWidth, byHeight, options) {
    this.element = $(element)
    var options = Object.extend({
	  scaleFromTop: true,
      scaleMode: 'box',        // 'box' or 'contents' or {} with provided values
      scaleByWidth: byWidth,
	  scaleByHeight: byHeight
    }, arguments[3] || {});
    this.start(options);
  },
  setup: function() {
    this.elementPositioning = this.element.getStyle('position');
      
    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;
	
    this.dims = null;
    if(this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
	 if(/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if(!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
	  
	this.deltaY = this.options.scaleByHeight;
	this.deltaX = this.options.scaleByWidth;
  },
  update: function(position) {
    var currentHeight = this.dims[0] + (this.deltaY * position);
	var currentWidth = this.dims[1] + (this.deltaX * position);
	
    this.setDimensions(currentHeight, currentWidth);
  },

  setDimensions: function(height, width) {
    var d = {};
    d.width = width + 'px';
    d.height = height + 'px';
    
	var topd  = Math.round((height - this.dims[0])/2);
	var leftd = Math.round((width  - this.dims[1])/2);
	if(this.elementPositioning == 'absolute' || this.elementPositioning == 'fixed') {
		if(!this.options.scaleFromTop) d.top = this.originalTop-topd + 'px';
		d.left = this.originalLeft-leftd + 'px';
	} else {
		if(!this.options.scaleFromTop) d.top = -topd + 'px';
		d.left = -leftd + 'px';
	}
    this.element.setStyle(d);
  }
});