/* $Id: tabber.js,v 1.9 2006/04/27 20:51:51 pat Exp $tabber.js by Patrick Fitzgerald pat@barelyfitz.comDocumentation can be found at the following URL:http://www.barelyfitz.com/projects/tabber/License (http://www.opensource.org/licenses/mit-license.php)Copyright (c) 2006 Patrick FitzgeraldPermission is hereby granted, free of charge, to any personobtaining a copy of this software and associated documentation files(the "Software"), to deal in the Software without restriction,including without limitation the rights to use, copy, modify, merge,publish, distribute, sublicense, and/or sell copies of the Software,and to permit persons to whom the Software is furnished to do so,subject to the following conditions:The above copyright notice and this permission notice shall beincluded in all copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OFMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ANDNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERSBE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN ANACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR INCONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THESOFTWARE.==================================================*/

function tabberObj(argsObj) {
  var arg; /* name of an argument to override */
  this.div = null;
  this.classMain = "tabber";
  this.classMainLive = "tabberlive";
  this.classTab = "tabbertab";
  this.classTabDefault = "tabbertabdefault";
  this.classNav = "tabbernav";
  this.classTabHide = "tabbertabhide";
  this.classNavActive = "tabberactive";
  this.titleElements = ['h2','h3','h4','h5','h6'];
  this.titleElementsStripHTML = true;
  this.removeTitle = true;
  this.addLinkId = false;
  this.linkIdFormat = '<tabberid>nav<tabnumberone>';
  for (arg in argsObj) { this[arg] = argsObj[arg]; }
  this.REclassMain = new RegExp('\\b' + this.classMain + '\\b', 'gi');
  this.REclassMainLive = new RegExp('\\b' + this.classMainLive + '\\b', 'gi');
  this.REclassTab = new RegExp('\\b' + this.classTab + '\\b', 'gi');
  this.REclassTabDefault = new RegExp('\\b' + this.classTabDefault + '\\b', 'gi');
  this.REclassTabHide = new RegExp('\\b' + this.classTabHide + '\\b', 'gi');
  this.tabs = new Array();
  if (this.div) {
    this.init(this.div);
    this.div = null;
  }
}

tabberObj.prototype.init = function(e) {
  var
  childNodes, /* child nodes of the tabber div */
  i, i2, /* loop indices */
  t, /* object to store info about a single tab */
  defaultTab=0, /* which tab to select by default */
  DOM_ul, /* tabbernav list */
  DOM_li, /* tabbernav list item */
  DOM_a, /* tabbernav link */
  aId, /* A unique id for DOM_a */
  headingElement; /* searching for text to use in the tab */
  if (!document.getElementsByTagName) { return false; }
  if (e.id) {
    this.id = e.id;
  }
  this.tabs.length = 0;
  childNodes = e.childNodes;
  for(i=0; i < childNodes.length; i++) {
    if(childNodes[i].className &&
       childNodes[i].className.match(this.REclassTab)) {
      t = new Object();
      t.div = childNodes[i];
			this.tabs[this.tabs.length] = t;
      if (childNodes[i].className.match(this.REclassTabDefault)) {
				defaultTab = this.tabs.length-1;
      }
    }
  }
  DOM_ul = document.createElement("ul");
  DOM_ul.className = this.classNav;
  for (i=0; i < this.tabs.length; i++) {
    t = this.tabs[i];
    t.headingText = t.div.title;
    if (this.removeTitle) { t.div.title = ''; }
    if (!t.headingText) {
      for (i2=0; i2<this.titleElements.length; i2++) {
	headingElement = t.div.getElementsByTagName(this.titleElements[i2])[0];
	if (headingElement) {
	  t.headingText = headingElement.innerHTML;
	  if (this.titleElementsStripHTML) {
	    t.headingText.replace(/<br>/gi," ");
	    t.headingText = t.headingText.replace(/<[^>]+>/g,"");
	  }
	  break;
	}
      }
    }

    if (!t.headingText) {
      t.headingText = i + 1;
    }
    DOM_li = document.createElement("li");
    t.li = DOM_li;
    DOM_a = document.createElement("a");
    DOM_a.appendChild(document.createTextNode(t.headingText));
    DOM_a.href = "javascript:void(null);";
    DOM_a.title = t.headingText;
    DOM_a.onclick = this.navClick;
    DOM_a.tabber = this;
    DOM_a.tabberIndex = i;

    /* Do we need to add an id to DOM_a? */
    if (this.addLinkId && this.linkIdFormat) {

      /* Determine the id name */
      aId = this.linkIdFormat;
      aId = aId.replace(/<tabberid>/gi, this.id);
      aId = aId.replace(/<tabnumberzero>/gi, i);
      aId = aId.replace(/<tabnumberone>/gi, i+1);
      aId = aId.replace(/<tabtitle>/gi, t.headingText.replace(/[^a-zA-Z0-9\-]/gi, ''));

      DOM_a.id = aId;
    }
    DOM_li.appendChild(DOM_a);
    DOM_ul.appendChild(DOM_li);
  }
  e.insertBefore(DOM_ul, e.firstChild);
  e.className = e.className.replace(this.REclassMain, this.classMainLive);
  this.tabShow(defaultTab);
  if (typeof this.onLoad == 'function') {
    this.onLoad({tabber:this});
  }
  return this;
};

tabberObj.prototype.navClick = function(event) {
  var
  rVal, /* Return value from the user onclick function */
  a, /* element that triggered the onclick event */
  self, /* the tabber object */
  tabberIndex, /* index of the tab that triggered the event */
  onClickArgs; /* args to send the onclick function */

  a = this;
  if (!a.tabber) { return false; }

  self = a.tabber;
  tabberIndex = a.tabberIndex;
  a.blur();
  if (typeof self.onClick == 'function') {
    onClickArgs = {'tabber':self, 'index':tabberIndex, 'event':event};
    if (!event) { onClickArgs.event = window.event; }
    rVal = self.onClick(onClickArgs);
    if (rVal === false) { return false; }
  }
  self.tabShow(tabberIndex);
  return false;
};

tabberObj.prototype.tabHideAll = function() {
  var i; /* counter */
  for (i = 0; i < this.tabs.length; i++) {
    this.tabHide(i);
  }
};

tabberObj.prototype.tabHide = function(tabberIndex) {
  var div;
  if (!this.tabs[tabberIndex]) { return false; }
  div = this.tabs[tabberIndex].div;
  if (!div.className.match(this.REclassTabHide)) {
    div.className += ' ' + this.classTabHide;
  }
  this.navClearActive(tabberIndex);
  return this;
};

tabberObj.prototype.tabShow = function(tabberIndex) {
  var div;
  if (!this.tabs[tabberIndex]) { return false; }
  this.tabHideAll();
  div = this.tabs[tabberIndex].div;
  div.className = div.className.replace(this.REclassTabHide, '');
  this.navSetActive(tabberIndex);
  if (typeof this.onTabDisplay == 'function') {
    this.onTabDisplay({'tabber':this, 'index':tabberIndex});
  }

  return this;
};

tabberObj.prototype.navSetActive = function(tabberIndex) {
  this.tabs[tabberIndex].li.className = this.classNavActive;
  return this;
};


tabberObj.prototype.navClearActive = function(tabberIndex) {
  this.tabs[tabberIndex].li.className = '';
  return this;
};

function tabberAutomatic(tabberArgs) {
  var
    tempObj, /* Temporary tabber object */
    divs, /* Array of all divs on the page */
    i; /* Loop index */
  if (!tabberArgs) { tabberArgs = {}; }
  tempObj = new tabberObj(tabberArgs);
  divs = document.getElementsByTagName("div");
  for (i=0; i < divs.length; i++) {
    if (divs[i].className &&
	divs[i].className.match(tempObj.REclassMain)) {
      tabberArgs.div = divs[i];
      divs[i].tabber = new tabberObj(tabberArgs);
    }
  }
  return this;
}

function tabberAutomaticOnLoad(tabberArgs) {
  var oldOnLoad;
  if (!tabberArgs) { tabberArgs = {}; }
  /* Taken from: http://simon.incutio.com/archive/2004/05/26/addLoadEvent */
  oldOnLoad = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = function() {
      tabberAutomatic(tabberArgs);
    };
  } else {
    window.onload = function() {
      oldOnLoad();
      tabberAutomatic(tabberArgs);
    };
  }
}

if (typeof tabberOptions == 'undefined') {
    tabberAutomaticOnLoad();
} else {
  if (!tabberOptions['manualStartup']) {
    tabberAutomaticOnLoad(tabberOptions);
  }
}