/*----------------------------------------------------------------------------\
|                               Tab Pane 1.02                                 |
|-----------------------------------------------------------------------------|
|                         Created by Erik Arvidsson                           |
|                  (http://webfx.eae.net/contact.html#erik)                   |
|                      For WebFX (http://webfx.eae.net/)                      |
|-----------------------------------------------------------------------------|
|                Copyright (c) 2002, 2003, 2006 Erik Arvidsson                |
|-----------------------------------------------------------------------------|
| Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| use this file except in compliance with the License.  You may obtain a copy |
| of the License at http://www.apache.org/licenses/LICENSE-2.0                |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| Unless  required  by  applicable law or  agreed  to  in  writing,  software |
| distributed under the License is distributed on an  "AS IS" BASIS,  WITHOUT |
| WARRANTIES OR  CONDITIONS OF ANY KIND,  either express or implied.  See the |
| License  for the  specific language  governing permissions  and limitations |
| under the License.                                                          |
|-----------------------------------------------------------------------------|
| 2002-01-?? | First working version                                          |
| 2002-02-17 | Cleaned up for 1.0 public version                              |
| 2003-02-18 | Changed from javascript uri for anchors to return false        |
| 2003-03-03 | Added dispose methods to release IE memory                     |
| 2006-05-28 | Changed license to Apache Software License 2.0.                |
|-----------------------------------------------------------------------------|
| Dependencies: *.css           a css file to define the layout               |
|-----------------------------------------------------------------------------|
| Created 2002-01-?? | All changes are in the log above. | Updated 2006-05-28 |
\----------------------------------------------------------------------------*/
// This function is used to define if the browser supports the needed
// features
function hasSupport() {
    if (typeof hasSupport.support != "undefined")
        return hasSupport.support;
    
    var ie55 = /msie 5\.[56789]/i.test( navigator.userAgent );
    
    hasSupport.support = ( typeof document.implementation != "undefined" &&
            document.implementation.hasFeature( "html", "1.0" ) || ie55 )
            
    // IE55 has a serious DOM1 bug... Patch it!
    if ( ie55 ) {
        document._getElementsByTagName = document.getElementsByTagName;
        document.getElementsByTagName = function ( sTagName ) {
            if ( sTagName == "*" )
                return document.all;
            else
                return document._getElementsByTagName( sTagName );
        };
    }
    return hasSupport.support;
}
///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab panes
//
// el : HTMLElement        The html element used to represent the tab pane
// bUseCookie : Boolean    Optional. Default is true. Used to determine whether to us
//                        persistance using cookies or not
//
function WebFXTabPane( el, bUseCookie ) {
    if ( !hasSupport() || el == null ) return;
    
    this.element = el;
    this.element.tabPane = this;
    this.pages = [];
    this.selectedIndex = null;
    this.useCookie = bUseCookie != null ? bUseCookie : true;
    
    // add class name tag to class name
    this.element.className = this.classNameTag + " " + this.element.className;
    
    // add tab row
    this.tabRow = document.createElement( "div" );
    this.tabRow.className = "tab-row";
    el.insertBefore( this.tabRow, el.firstChild );
    var tabIndex = 0;
    if ( this.useCookie ) {
        tabIndex = Number( WebFXTabPane.getCookie( "webfxtab_" + this.element.id ) );
        if ( isNaN( tabIndex ) )
            tabIndex = 0;
    }
    this.selectedIndex = tabIndex;
    
    // loop through child nodes and add them
    var cs = el.childNodes;
    var n;
    for (var i = 0; i < cs.length; i++) {
        if (cs[i].nodeType == 1 && cs[i].className == "tab-page") {
            this.addTabPage( cs[i] );
        }
    }
}
WebFXTabPane.prototype.classNameTag = "dynamic-tab-pane-control";
WebFXTabPane.prototype.setSelectedIndex = function ( n ) {
    if (this.selectedIndex != n) {
        if (this.selectedIndex != null && this.pages[ this.selectedIndex ] != null )
            this.pages[ this.selectedIndex ].hide();
        this.selectedIndex = n;
        this.pages[ this.selectedIndex ].show();
        
        if ( this.useCookie )
            WebFXTabPane.setCookie( "webfxtab_" + this.element.id, n );    // session cookie
    }
};
    
WebFXTabPane.prototype.getSelectedIndex = function () {
    return this.selectedIndex;
};
    
WebFXTabPane.prototype.addTabPage = function ( oElement ) {
    if ( !hasSupport() ) return;
    
    if ( oElement.tabPage == this )    // already added
        return oElement.tabPage;
    var n = this.pages.length;
    var tp = this.pages[n] = new WebFXTabPage( oElement, this, n );
    tp.tabPane = this;
    
    // move the tab out of the box
    this.tabRow.appendChild( tp.tab );
            
    if ( n == this.selectedIndex )
        tp.show();
    else
        tp.hide();
        
    return tp;
};
    
WebFXTabPane.prototype.dispose = function () {
    this.element.tabPane = null;
    this.element = null;        
    this.tabRow = null;
    
    for (var i = 0; i < this.pages.length; i++) {
        this.pages[i].dispose();
        this.pages[i] = null;
    }
    this.pages = null;
};
// Cookie handling
WebFXTabPane.setCookie = function ( sName, sValue, nDays ) {
    var expires = "";
    if ( nDays ) {
        var d = new Date();
        d.setTime( d.getTime() + nDays * 24 * 60 * 60 * 1000 );
        expires = "; expires=" + d.toGMTString();
    }
    document.cookie = sName + "=" + sValue + expires + "; path=/";
};
WebFXTabPane.getCookie = function (sName) {
    var re = new RegExp( "(\;|^)[^;]*(" + sName + ")\=([^;]*)(;|$)" );
    var res = re.exec( document.cookie );
    return res != null ? res[3] : null;
};
WebFXTabPane.removeCookie = function ( name ) {
    setCookie( name, "", -1 );
};


///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab pages. This one should not be used.
// Use WebFXTabPage.addTabPage instead
//
// el : HTMLElement            The html element used to represent the tab pane
// tabPane : WebFXTabPane    The parent tab pane
// nindex :    Number            The index of the page in the parent pane page array
//
function WebFXTabPage( el, tabPane, nIndex ) {
    if ( !hasSupport() || el == null ) return;
    
    this.element = el;
    this.element.tabPage = this;
    this.index = nIndex;
    
    var cs = el.childNodes;
    for (var i = 0; i < cs.length; i++) {
        if (cs[i].nodeType == 1 && cs[i].className == "tab") {
            this.tab = cs[i];
            break;
        }
    }
    
    // insert a tag around content to support keyboard navigation
    
    
    var a = document.createElement( "A" );
    this.aElement = a;
    a.href = "#";
    a.onclick = function () { return false; };
    while ( this.tab.hasChildNodes() )
        a.appendChild( this.tab.firstChild );
    this.tab.appendChild( a );
    
    // hook up events, using DOM0
    var oThis = this;
    this.tab.onclick = function () { oThis.select(); };
    this.tab.onmouseover = function () { WebFXTabPage.tabOver( oThis ); };
    this.tab.onmouseout = function () { WebFXTabPage.tabOut( oThis ); };
}
WebFXTabPage.prototype.show = function () {
    var el = this.tab;
    var s = el.className + " selected";
    s = s.replace(/ +/g, " ");
    el.className = s;
    
    this.element.style.display = "block";
};
WebFXTabPage.prototype.hide = function () {
    var el = this.tab;
    var s = el.className;
    s = s.replace(/ selected/g, "");
    el.className = s;
    this.element.style.display = "none";
};
    
WebFXTabPage.prototype.select = function () {
    this.tabPane.setSelectedIndex( this.index );
};
    
WebFXTabPage.prototype.dispose = function () {
    this.aElement.onclick = null;
    this.aElement = null;
    this.element.tabPage = null;
    this.tab.onclick = null;
    this.tab.onmouseover = null;
    this.tab.onmouseout = null;
    this.tab = null;
    this.tabPane = null;
    this.element = null;
};
WebFXTabPage.tabOver = function ( tabpage ) {
    var el = tabpage.tab;
    var s = el.className + " hover";
    s = s.replace(/ +/g, " ");
    el.className = s;
};
WebFXTabPage.tabOut = function ( tabpage ) {
    var el = tabpage.tab;
    var s = el.className;
    s = s.replace(/ hover/g, "");
    el.className = s;
};
// This function initializes all uninitialized tab panes and tab pages
function setupAllTabs() {
    if ( !hasSupport() ) return;
    var all = document.getElementsByTagName( "*" );
    var l = all.length;
    var tabPaneRe = /tab\-pane/;
    var tabPageRe = /tab\-page/;
    var cn, el;
    var parentTabPane;
    
    for ( var i = 0; i < l; i++ ) {
        el = all[i]
        cn = el.className;
        // no className
        if ( cn == "" ) continue;
        
        // uninitiated tab pane
        if ( tabPaneRe.test( cn ) && !el.tabPane )
            new WebFXTabPane( el );
    
        // unitiated tab page wit a valid tab pane parent
        else if ( tabPageRe.test( cn ) && !el.tabPage &&
                    tabPaneRe.test( el.parentNode.className ) ) {
            el.parentNode.tabPane.addTabPage( el );            
        }
    }
}
function disposeAllTabs() {
    if ( !hasSupport() ) return;
    
    var all = document.getElementsByTagName( "*" );
    var l = all.length;
    var tabPaneRe = /tab\-pane/;
    var cn, el;
    var tabPanes = [];
    
    for ( var i = 0; i < l; i++ ) {
        el = all[i]
        cn = el.className;
        // no className
        if ( cn == "" ) continue;
        
        // tab pane
        if ( tabPaneRe.test( cn ) && el.tabPane )
            tabPanes[tabPanes.length] = el.tabPane;
    }
    
    for (var i = tabPanes.length - 1; i >= 0; i--) {
        tabPanes[i].dispose();
        tabPanes[i] = null;
    }
}
// initialization hook up
// DOM2
if ( typeof window.addEventListener != "undefined" )
    window.addEventListener( "load", setupAllTabs, false );
// IE 
else if ( typeof window.attachEvent != "undefined" ) {
    window.attachEvent( "onload", setupAllTabs );
    window.attachEvent( "onunload", disposeAllTabs );
}
else {
    if ( window.onload != null ) {
        var oldOnload = window.onload;
        window.onload = function ( e ) {
            oldOnload( e );
            setupAllTabs();
        };
    }
    else 
        window.onload = setupAllTabs;
}