/*
ModalBox - The pop-up window thingie with AJAX, based on prototype and script.aculo.us.
 
Copyright Andrey Okonetchnikov (andrej.okonetschnikow@gmail.com), 2006-2007
All rights reserved.
 
VERSION 1.6.1
Last Modified: 01/11/2010
*/
 
if (!window.Modalbox)
var Modalbox = new Object();
 
Modalbox.Methods = {
overrideAlert: false, // Override standard browser alert message with ModalBox
focusableElements: [],
currFocused: 0,
initialized: false,
active: true,
options: {
title: "ModalBox Window", // Title of the ModalBox window
overlayClose: true, // Close modal box by clicking on overlay
width: 500, // Default width in px
height: 90, // Default height in px
overlayOpacity: 0.65, // Default overlay opacity
overlayDuration: 0.25, // Default overlay fade in/out duration in seconds
slideDownDuration: 0.5, // Default Modalbox appear slide down effect in seconds
slideUpDuration: 0.5, // Default Modalbox hiding slide up effect in seconds
resizeDuration: 0.25, // Default resize duration seconds
inactiveFade: true, // Fades MB window on inactive state
transitions: true, // Toggles transition effects. Transitions are enabled by default
loadingString: "", // Default loading string message
closeString: "Close window", // Default title attribute for close window link
closeValue: "×", // Default string for close link in the header
params: {},
method: 'post', // Default Ajax request method
autoFocusing: false, // Toggles auto-focusing for form elements. Disable for long text pages.
aspnet: false // Should be use then using with ASP.NET costrols. Then true Modalbox window will be injected into the first form element.
},
_options: new Object,
 
setOptions: function(options) {
Object.extend(this.options, options || {});
},
 
_init: function(options) {
// Setting up original options with default options
Object.extend(this._options, this.options);
this.setOptions(options);
 
//Creating the overlay
this.MBoverlay = new Element("div", {id: "MB_overlay", style: "opacity: 0"});
 
//Creating the modal window
this.MBwindow = new Element("div", {id: "MB_window", style: "display: none"}).update(
this.MBframe = new Element("div", {id: "MB_frame"}).update(
this.MBheader = new Element("div", {id: "MB_header"}).update(
this.MBcaption = new Element("div", {id: "MB_caption"})
)
)
);
this.MBclose = new Element("a", {id: "MB_close", title: this.options.closeString, href: "#"}).update("<span>" + this.options.closeValue + "</span>");
this.MBheader.insert({'bottom':this.MBclose});
 
this.MBcontent = new Element("div", {id: "MB_content"}).update(
this.MBloading = new Element("div", {id: "MB_loading"}).update(this.options.loadingString)
);
this.MBframe.insert({'bottom':this.MBcontent});
 
// Inserting into DOM. If parameter set and form element have been found will inject into it. Otherwise will inject into body as topmost element.
// Be sure to set padding and marging to null via CSS for both body and (in case of asp.net) form elements.
var injectToEl = this.options.aspnet ? $(document.body).down('form') : $(document.body);
injectToEl.insert({'top':this.MBwindow});
injectToEl.insert({'top':this.MBoverlay});
 
// 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;
 
//Adding event observers
this.hideObserver = this._hide.bindAsEventListener(this);
this.kbdObserver = this._kbdHandler.bindAsEventListener(this);
this._initObservers();
 
this.initialized = true; // Mark as initialized
},
 
show: function(content, options) {
if(!this.initialized) this._init(options); // Check for is already initialized
 
this.content = content;
this.setOptions(options);
 
if(this.options.title) // Updating title of the MB
$(this.MBcaption).update(this.options.title);
else { // If title isn't given, the header will not displayed
$(this.MBheader).hide();
$(this.MBcaption).hide();
}
 
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 onUpdate callback
}
},
 
hide: function(options) { // External hide method to use from external HTML and JS
if(this.initialized) {
// Reading for options/callbacks except if event given as a parameter
if(options && typeof options.element != 'function') Object.extend(this.options, options);
// Passing beforeHide callback
this.event("beforeHide");
if(this.options.transitions)
Effect.SlideUp(this.MBwindow, { duration: this.options.slideUpDuration, transition: Effect.Transitions.sinoidal, afterFinish: this._deinit.bind(this) } );
else {
$(this.MBwindow).hide();
this._deinit();
}
} else throw("Modalbox is not initialized.");
},
 
_hide: function(event) { // Internal hide method to use with overlay and close link
event.stop(); // Stop event propagation for link elements
/* Then clicked on overlay we'll check the option and in case of overlayClose == false we'll break hiding execution [Fix for #139] */
if(event.element().id == 'MB_overlay' && !this.options.overlayClose) return false;
this.hide();
},
 
alert: function(message){
var html = '<div class="MB_alert"><p>' + message + '</p><input type="button" onclick="Modalbox.hide()" value="OK" /></div>';
Modalbox.show(html, {title: 'Alert: ' + document.title, width: 300});
},
 
_appear: function() { // First appearing of MB
if(Prototype.Browser.IE && !navigator.appVersion.match(/\b7.0\b/)) { // Preparing IE 6 for showing modalbox
window.scrollTo(0,0);
this._prepareIE("100%", "hidden");
}
this._setWidth();
this._setPosition();
if(this.options.transitions) {
this.MBoverlay.setStyle({opacity: 0});
new Effect.Fade(this.MBoverlay, {
from: 0,
to: this.options.overlayOpacity,
duration: this.options.overlayDuration,
afterFinish: function() {
new Effect.SlideDown(this.MBwindow, {
duration: this.options.slideDownDuration,
transition: Effect.Transitions.sinoidal,
afterFinish: function(){
this._setPosition();
this.loadContent();
}.bind(this)
});
}.bind(this)
});
} else {
this.MBoverlay.setStyle({opacity: this.options.overlayOpacity});
$(this.MBwindow).show();
this._setPosition();
this.loadContent();
}
this._setWidthAndPosition = this._setWidthAndPosition.bindAsEventListener(this);
Event.observe(window, "resize", this._setWidthAndPosition);
},
 
resize: function(byWidth, byHeight, options) { // Change size of MB without loading content
var w = this.MBwindow.getDimensions();
var hHeight = $(this.MBheader).getHeight();
var cHeight = $(this.MBcontent).getHeight();
var newHeight = ((w.height - hHeight + byHeight) < cHeight) ? (cHeight + hHeight) : (w.height + byHeight);
var newWidth = w.width + byWidth;
this.options.width = newWidth; // is this used anywhere else?
if(options) this.setOptions(options); // Passing callbacks
if(this.options.transitions) {
var oWidth = this.MBoverlay.getWidth();
new Effect.Morph(this.MBwindow, {
style: "width:" + newWidth + "px; height:" + newHeight + "px; left:" + ((oWidth - newWidth)/2) + "px",
duration: this.options.resizeDuration,
beforeStart: function(fx){
fx.element.setStyle({overflow:"hidden"}); // Fix for MSIE 6 to resize correctly
},
afterFinish: function(fx) {
fx.element.setStyle({overflow:"visible"});
this.event("_afterResize"); // Passing internal callback
this.event("afterResize"); // Passing callback
}.bind(this)
});
} else {
this.MBwindow.setStyle({width: newWidth + "px", height: newHeight + "px"});
setTimeout(function() {
this.event("_afterResize"); // Passing internal callback
this.event("afterResize"); // Passing callback
}.bind(this), 1);
}
 
},
 
resizeToContent: function(options){
// Resizes the modalbox window to the actual content height.
// This might be useful to resize modalbox after some content modifications which were changed content height.
 
var byHeight = this.options.height - $(this.MBwindow).getHeight();
if(byHeight != 0) {
if(options) this.setOptions(options); // Passing callbacks
Modalbox.resize(0, byHeight);
}
},
 
resizeToInclude: function(element, options){
// Resizes the modalbox window to the cumulative height of element. Calculations are using CSS properties for margins and border.
// This method might be useful to resize modalbox before including or updating content.
 
var el = $(element);
var styles = ['margin-top','margin-bottom','border-top-width','border-bottom-width'];
var elHeight = styles.inject(el.getHeight,function(acc,n){
var x = parseInt(el.getStyle(n), 10);
acc += (isNaN(x) ? 0 : x);
return acc;
});
if(elHeight > 0) {
if(options) this.setOptions(options); // Passing callbacks
Modalbox.resize(0, elHeight);
}
},
 
_update: function() { // Updating MB in case of wizards
$(this.MBcontent).update($(this.MBloading).update(this.options.loadingString));
this.loadContent();
},
 
loadContent: function () {
if(this.event("beforeLoad") != false) { // If callback passed false, skip loading of the content
if(typeof this.content == 'string') {
var htmlRegExp = new RegExp(/<\/?[^>]+>/gi);
if(htmlRegExp.test(this.content)) { // Plain HTML given as a parameter
this._insertContent(this.content.stripScripts(), function(){
this.content.extractScripts().map(function(script) {
return eval(script.replace("<!--", "").replace("// -->", ""));
}.bind(window));
}.bind(this));
} else // URL given as a parameter. We'll request it via Ajax
new Ajax.Request( this.content, { method: this.options.method.toLowerCase(), parameters: this.options.params+'&box=true',
onSuccess: function(transport) {
var response = new String(transport.responseText);
this._insertContent(transport.responseText.stripScripts(), function(){
response.extractScripts().map(function(script) {
return eval(script.replace("<!--", "").replace("// -->", ""));
}.bind(window));
});
}.bind(this),
onException: function(instance, exception){
Modalbox.hide();
throw('Modalbox Loading Error: ' + exception);
}
});
 
} else if (typeof this.content == 'object') {// HTML Object is given
this._insertContent(this.content);
} else {
Modalbox.hide();
throw('Modalbox Parameters Error: Please specify correct URL or HTML element (plain HTML or object)');
}
}
},
 
_insertContent: function(content, callback){
$(this.MBcontent).hide().update("");
if(typeof content == 'string') { // Plain HTML is given
this.MBcontent.update(new Element("div", { style: "display: none" }).update(content)).down().show();
} else if (typeof content == 'object') { // HTML Object is given
var _htmlObj = content.cloneNode(true); // If node already a part of DOM we'll clone it
// If clonable element has ID attribute defined, modifying it to prevent duplicates
if(content.id) content.id = "MB_" + content.id;
// Add prefix for IDs on all elements inside the DOM node
$(content).select('*[id]').each(function(el){ el.id = "MB_" + el.id; });
this.MBcontent.update(_htmlObj).down('div').show();
if(Prototype.Browser.IE) // Toggling back visibility for hidden selects in IE
$$("#MB_content select").invoke('setStyle', {'visibility': ''});
}
 
// Prepare and resize modal box for content
var w = this.MBwindow.getDimensions();
if(this.options.height == this._options.height) {
Modalbox.resize((this.options.width - w.width), $(this.MBcontent).getHeight() - w.height + $(this.MBheader).getHeight(), {
afterResize: function(){
setTimeout(function(){ // MSIE fix
this._putContent(callback);
}.bind(this),1);
}.bind(this)
});
} else { // Height is defined. Creating a scrollable window
this._setWidth();
this.MBcontent.setStyle({overflow: 'auto', height: w.height - $(this.MBheader).getHeight() - 13 + 'px'});
setTimeout(function(){ // MSIE fix
this._putContent(callback);
}.bind(this), 1);
}
},
 
_putContent: function(callback){
this.MBcontent.show();
this.focusableElements = this._findFocusableElements();
this._setFocus(); // Setting focus on first 'focusable' element in content (input, select, textarea, link or button)
if(callback != undefined)
callback(); // Executing internal JS from loaded content
this.event("afterLoad"); // Passing callback
},
 
activate: function(options){
this.setOptions(options);
this.active = true;
$(this.MBclose).observe("click", this.hideObserver);
if(this.options.overlayClose)
this.MBoverlay.observe("click", this.hideObserver);
$(this.MBclose).show();
if(this.options.transitions && this.options.inactiveFade)
new Effect.Appear(this.MBwindow, {duration: this.options.slideUpDuration});
},
 
deactivate: function(options) {
this.setOptions(options);
this.active = false;
$(this.MBclose).stopObserving("click", this.hideObserver);
if(this.options.overlayClose)
this.MBoverlay.stopObserving("click", this.hideObserver);
$(this.MBclose).hide();
if(this.options.transitions && this.options.inactiveFade)
new Effect.Fade(this.MBwindow, {duration: this.options.slideUpDuration, to: 0.75});
},
 
_initObservers: function(){
$(this.MBclose).observe("click", this.hideObserver);
if(this.options.overlayClose)
this.MBoverlay.observe("click", this.hideObserver);
if(Prototype.Browser.Gecko)
Event.observe(document, "keypress", this.kbdObserver); // Gecko is moving focus a way too fast
else
Event.observe(document, "keydown", this.kbdObserver); // All other browsers are okay with keydown
},
 
_removeObservers: function(){
$(this.MBclose).stopObserving("click", this.hideObserver);
if(this.options.overlayClose)
this.MBoverlay.stopObserving("click", this.hideObserver);
if(Prototype.Browser.Gecko)
Event.stopObserving(document, "keypress", this.kbdObserver);
else
Event.stopObserving(document, "keydown", this.kbdObserver);
},
 
_setFocus: function() {
/* Setting focus to the first 'focusable' element which is one with tabindex = 1 or the first in the form loaded. */
if(this.focusableElements.length > 0 && this.options.autoFocusing == true) {
var firstEl = this.focusableElements.find(function (el){
return el.tabIndex == 1;
}) || this.focusableElements.first();
this.currFocused = this.focusableElements.toArray().indexOf(firstEl);
firstEl.focus(); // Focus on first focusable element except close button
} else if($(this.MBclose).visible())
$(this.MBclose).focus(); // If no focusable elements exist focus on close button
},
 
_findFocusableElements: function(){ // Collect form elements or links from MB content
this.MBcontent.select('input:not([type~=hidden]), select, textarea, button, a[href]').invoke('addClassName', 'MB_focusable');
return this.MBcontent.select('.MB_focusable');
},
 
_kbdHandler: function(event) {
var node = event.element();
switch(event.keyCode) {
case Event.KEY_TAB:
event.stop();
 
/* Switching currFocused to the element which was focused by mouse instead of TAB-key. Fix for #134 */
if(node != this.focusableElements[this.currFocused])
this.currFocused = this.focusableElements.toArray().indexOf(node);
 
if(!event.shiftKey) { //Focusing in direct order
if(this.currFocused >= this.focusableElements.length - 1) {
this.currFocused = 0;
} else {
this.currFocused++;
}
} else { // Shift key is pressed. Focusing in reverse order
if(this.currFocused <= 0) {
this.currFocused = this.focusableElements.length - 1;
} else {
this.currFocused--;
}
}
this.focusableElements[this.currFocused].focus();
break;
case Event.KEY_ESC:
if(this.active) this._hide(event);
break;
case 32:
this._preventScroll(event);
break;
case 0: // For Gecko browsers compatibility
if(event.which == 32) this._preventScroll(event);
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:
// Safari operates in slightly different way. This realization is still buggy in Safari.
if(Prototype.Browser.WebKit && !["textarea", "select"].include(node.tagName.toLowerCase()))
event.stop();
else if( (node.tagName.toLowerCase() == "input" && ["submit", "button"].include(node.type)) || (node.tagName.toLowerCase() == "a") )
event.stop();
break;
}
},
 
_preventScroll: function(event) { // Disabling scrolling by "space" key
if(!["input", "textarea", "select", "button"].include(event.element().tagName.toLowerCase()))
event.stop();
},
 
_deinit: function () {
this._removeObservers();
Event.stopObserving(window, "resize", this._setWidthAndPosition);
if(this.options.transitions) {
Effect.toggle(this.MBoverlay, 'appear', {duration: this.options.overlayDuration, afterFinish: this._removeElements.bind(this) });
} else {
this.MBoverlay.hide();
this._removeElements();
}
$(this.MBcontent).setStyle({overflow: '', height: ''});
},
 
_removeElements: function () {
if (Prototype.Browser.Opera) { // Remove overlay after-effects in Opera
window.scrollBy(0, 0);
}
this.MBoverlay.remove();
this.MBwindow.remove();
if(Prototype.Browser.IE && !navigator.appVersion.match(/\b7.0\b/)) {
this._prepareIE("", ""); // If set to auto MSIE will show horizontal scrolling
window.scrollTo(this.initScrollX, this.initScrollY);
}
 
/* Replacing prefixes 'MB_' in IDs for the original content */
if(typeof this.content == 'object') {
if(this.content.id && this.content.id.match(/MB_/)) {
this.content.id = this.content.id.replace(/MB_/, "");
}
this.content.select('*[id]').each(function(el){ el.id = el.id.replace(/MB_/, ""); });
}
/* Initialized will be set to false */
this.initialized = false;
this.event("afterHide"); // Passing afterHide callback
this.setOptions(this._options); // Settings options object into initial state
},
 
_setWidth: function () { //Set size
this.MBwindow.setStyle({width: this.options.width + "px", height: this.options.height + "px"});
},
 
_setPosition: function () {
this.MBwindow.setStyle({left: (($(this.MBoverlay).getWidth() - $(this.MBwindow).getWidth()) / 2 ) + "px"});
},
 
_setWidthAndPosition: function () {
$(this.MBwindow).setStyle({width: this.options.width + "px"});
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;
},
_prepareIE: function(height, overflow){
$$('html, body').invoke('setStyle', {width: height, height: height, overflow: overflow}); // IE requires width and height set to 100% and overflow hidden
$$("select").invoke('setStyle', {'visibility': overflow}); // Toggle visibility for all selects in the common document
},
event: function(eventName) {
var r = true;
    if(this.options[eventName]) {
      var returnValue = this.options[eventName](); // Executing callback
      this.options[eventName] = null; // Removing callback after execution
      if(!Object.isUndefined(returnValue))
        r = returnValue;
    }
    Event.fire(document, 'Modalbox:' + eventName);
    return r;
  }
};
 
Object.extend(Modalbox, Modalbox.Methods);
 
if(Modalbox.overrideAlert) window.alert = Modalbox.alert;