// (c)2003-2008 activeweave, inc. - http://www.activeweave.com
// author: Jean Sini - mailto:jean@activeweave.com

Activeweave = window.Activeweave || {};

Activeweave.Utils = window.Activeweave.Utils ||
{
isDebug       : false,
showPosts     : false,
ieAgent       : navigator.appName =="Microsoft Internet Explorer",
USER          : "user",
EVENT         : "evt",
SERVICE       : "service",
SHOW          : "show",
BUNDLES       : "bundles",
PROMPT_DNLD   : "dnld",
PROMPT_VISITED: "visit",
BLOG          : "b",
BODY          : "body",
INTRO         : "intro",
POST          : "p",
INHERIT       : "i",
SUB           : "e.sub",
UNSUB         : "e.unsub",
EVT_PASSWORD  : "e.password",
EVT_REGISTER  : "e.register",
EVT_NAME      : "e.name",
PASSWORD      : "pass",
NAME          : "process.name",
DISAMBIGUATE  : "disambiguate",
CURRENT       : "current",
CONFIRM       : "confirm",
URL           : "url",
ACCOUNT       : "a.id",
TERMS         : "terms",
REG_ERROR     : "signup.error.generic",
imgs          : "/skin/img",
dimTimers     : {},

isIE:  function()
  {
  return Activeweave.Utils.ieAgent;
  },

isIE6 : function()
  {
  var is = false
  var ua = navigator.userAgent;
  var MSIE = "MSIE";
  if(ua&&ua.indexOf(MSIE)>=0)
    {
    var index = ua.indexOf(MSIE);
		if (index>=0)
      {
      var v = parseFloat(ua.substring(index+MSIE.length+1));
      if(v<7) is = true;
      }
    }
  return is;
  },

isMacFF: function()
  {
  var userAgent = navigator.userAgent.toLowerCase();
  if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1)
    {
    return true;
    }
  },

hitch: function(obj, methodName)
  {
  return function() { obj[methodName].apply(obj, arguments); }
  },

log: function(message, exception)
  {
  if(Activeweave.Utils.isDebug)
    {
    var m = message?message:"";
    if(exception)
      {
      m += (message.length>0?" - ":"")+"Exception ["+exception.message+"].";
      }
    alert(m);
    }
  },

/* returns a string representing the specified name and url-encoded value. */
/* accepts a boolean argument indicating whether this request parameter    */
/* is the first specified in the request. If not, a '&' will be prepended. */
addParameter: function(name,value,isFirst)
  {
  var param = name+'='+encodeURIComponent(value);
  if(isFirst)
    {
    return param;
    }
  else
    {
    return '&'+param;
    }
  },

swap: function(id, src)
  {
	$(id).src = src;
  },

setOpacity: function(el,op)
  {
  if(Activeweave.Utils.isIE() && typeof el.style.filter == 'string')
    {
    el.style.filter = 'alpha(opacity=' + op * 100 + ')';
    if (!el.currentStyle || !el.currentStyle.hasLayout)
      {
      el.style.zoom = 1; // when no layout or cant tell
      }
    }
  else
    {
    el.style.opacity = op;
    el.style['-moz-opacity'] = op;
    el.style['-khtml-opacity'] = op;
    }
  },

getOpacity: function(el)
  {
  var value;
  if (Activeweave.Utils.isIE() && el.filters)
    {
    value = 1;
    try
      {
      value = el.filters.item('DXImageTransform.Microsoft.Alpha').opacity / 100;
      }
    catch(e)
      {
      try
        {
        value = el.filters.item('alpha').opacity / 100;
        }
      catch(e)
        {}
      }
    }
  else
    {
    value = el.style.opacity;
    }
  return value;
  },

dim: function(el,delay,show,preserve)
  {
  try
    {
    if(el)
      {
      var op            = Activeweave.Utils.getOpacity(el);
      var starting      = show?0.0:1.0;
      var decrement     = show?-0.1:0.1;
      var currentDimmer = Activeweave.Utils.dimTimers[el];
      if(currentDimmer&&currentDimmer.timer&&currentDimmer.s!=show)
        {
        window.clearTimeout(currentDimmer.timer);
        op = starting;
        }
      if(!op)
        {
        op = starting;
        }
      op-=decrement;
      if((show&&op<1.0)||((!show)&&op>0.0))
        {
        Activeweave.Utils.setOpacity(el,op);
        var timeout = window.setTimeout(function() { Activeweave.Utils.dim(el,delay,show,preserve);},delay||100);
        Activeweave.Utils.dimTimers[el] = { 'd': delay,'s':show,'p':preserve,'timer':timeout};
        }
      else if((!show)&&(!preserve))
        {
        el.innerHTML = "";
        Activeweave.Utils.setOpacity(el,1.0);
        Activeweave.Utils.dimTimers[el] = null;
        }
      else
        {
        Activeweave.Utils.dimTimers[el] = null;
        }
      }
    }
  catch(ex)
    {
    Activeweave.Utils.log("Activeweave.Utils.dim()",ex);  
    }
  },

resize: function()
  {
  try
    {
    Activeweave.sizeShadow();
    Activeweave.sizePopup();
    var signin = $('signinPopup');
    if(signin) Activeweave.sizePopup(signin);
    }
  catch(ex)
    {
    Activeweave.Utils.log("Activeweave.Utils.resize()",ex);        
    }
  },

getCookie: function(name)
  {
  var value = null;
  try
    {
    var allCookies = document.cookie;
    var start = allCookies.indexOf(name + "=");
    if( start >= 0 )
      {
      start += 1 + name.length;
      var end = allCookies.indexOf(";", start);
      if( end <= 0 ) end = allCookies.length;
      value = allCookies.substring(start, end);
      value = window.decodeURIComponent(value);
      }
    }
  catch( ex )
    {
    value = null;
    Activeweave.log("Activeweave.Utils.getCookie()", ex);
    }
  return value;
  }
};

String.prototype.trim = function ()
  {
  return this.replace(/^\s*(\S*(\s+\S+)*)\s*$/, "$1");
  }

/*
   The following code is Copyright (C) Simon Willison 2004.

   document.getElementsBySelector(selector)
   - returns an array of element objects from the current document
     matching the CSS selector. Selectors can contain element names,
     class names and ids and can be nested. For example:

       elements = document.getElementsBySelect('div#main p a.external')

     Will return an array of all 'a' elements with 'external' in their
     class attribute that are contained inside 'p' elements that are
     contained inside the 'div' element which has id="main"

   New in version 0.4: Support for CSS2 and CSS3 attribute selectors:
   See http://www.w3.org/TR/css3-selectors/#attribute-selectors

   Version 0.4 - Simon Willison, March 25th 2003
   -- Works in Phoenix 0.5, Mozilla 1.3, Opera 7, Internet Explorer 6, Internet Explorer 5 on Windows
   -- Opera 7 fails
*/

function getAllChildren(e) {
  // Returns all children of element. Workaround required for IE5/Windows. Ugh.
  return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {
  // Attempt to fail gracefully in lesser browsers
  if (!document.getElementsByTagName) {
    return new Array();
  }
  // Split selector in to tokens
  var tokens = selector.split(' ');
  var currentContext = new Array(document);
  for (var i = 0; i < tokens.length; i++) {
    token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
    if (token.indexOf('#') > -1) {
      // Token is an ID selector
      var bits = token.split('#');
      var tagName = bits[0];
      var id = bits[1];
      var element = document.getElementById(id);
      if (tagName && element.nodeName.toLowerCase() != tagName) {
        // tag with that ID not found, return false
        return new Array();
      }
      // Set currentContext to contain just this element
      currentContext = new Array(element);
      continue; // Skip to next token
    }
    if (token.indexOf('.') > -1) {
      // Token contains a class selector
      var bits = token.split('.');
      var tagName = bits[0];
      var className = bits[1];
      if (!tagName) {
        tagName = '*';
      }
      // Get elements matching tag, filter them for class selector
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {
            elements = getAllChildren(currentContext[h]);
        } else {
            elements = currentContext[h].getElementsByTagName(tagName);
        }
        for (var j = 0; j < elements.length; j++) {
          found[foundCount++] = elements[j];
        }
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {
        if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
          currentContext[currentContextIndex++] = found[k];
        }
      }
      continue; // Skip to next token
    }
    // Code to deal with attribute selectors
    if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
      var tagName = RegExp.$1;
      var attrName = RegExp.$2;
      var attrOperator = RegExp.$3;
      var attrValue = RegExp.$4;
      if (!tagName) {
        tagName = '*';
      }
      // Grab all of the tagName elements within current context
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {
            elements = getAllChildren(currentContext[h]);
        } else {
            elements = currentContext[h].getElementsByTagName(tagName);
        }
        for (var j = 0; j < elements.length; j++) {
          found[foundCount++] = elements[j];
        }
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      var checkFunction; // This function will be used to filter the elements
      switch (attrOperator) {
        case '=': // Equality
          checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
          break;
        case '~': // Match one of space seperated words
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
          break;
        case '|': // Match start with value followed by optional hyphen
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
          break;
        case '^': // Match starts with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
          break;
        case '$': // Match ends with value - fails with "Warning" in Opera 7
          checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
          break;
        case '*': // Match ends with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
          break;
        default :
          // Just test for existence of attribute
          checkFunction = function(e) { return e.getAttribute(attrName); };
      }
      currentContext = new Array;
      currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {
        if (checkFunction(found[k])) {
          currentContext[currentContextIndex++] = found[k];
        }
      }
      continue; // Skip to next token
    }

    if (!currentContext[0]){
    	return;
    }

    // If we get here, token is JUST an element (not a class or ID selector)
    tagName = token;
    var found = new Array;
    var foundCount = 0;
    for (var h = 0; h < currentContext.length; h++) {
      var elements = currentContext[h].getElementsByTagName(tagName);
      for (var j = 0; j < elements.length; j++) {
        found[foundCount++] = elements[j];
      }
    }
    currentContext = found;
  }
  return currentContext;
}