/* Copyright (c) 1997-2006 Stuart Langridge | MIT licence
http://www.kryogenix.org/

Permission is hereby granted, free of charge, to any person obtaining
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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */

// ================================================

addEvent(window, "load", makeNiceTitles);

var XHTMLNS = "http://www.w3.org/1999/xhtml";
var CURRENT_NICE_TITLE;
var browser = new Browser();

function makeNiceTitles() {
  if (!document.createElement || !document.getElementsByTagName) return;
  // add namespace methods to HTML DOM; this makes the script work in both
  // HTML and XML contexts.
  if(!document.createElementNS) {
    document.createElementNS = function(ns,elt) {
      return document.createElement(elt);
    }
  }

  if( !document.links ) {
    document.links = document.getElementsByTagName("a");
  }
  for (var ti=0;ti<document.links.length;ti++) {
    var lnk = document.links[ti];
    if (lnk.title) {
      lnk.setAttribute("nicetitle",lnk.title);
      lnk.removeAttribute("title");
      addEvent(lnk,"mouseover",showNiceTitle);
      addEvent(lnk,"mouseout",hideNiceTitle);
      addEvent(lnk,"focus",showNiceTitle);
      addEvent(lnk,"blur",hideNiceTitle);
    }
  }
  var instags = document.getElementsByTagName("ins");
  if (instags) {
    for (var ti=0;ti<instags.length;ti++) {
      var instag = instags[ti];
      if (instag.dateTime) {
        var strDate = instag.dateTime;
        var dtIns = new Date(strDate.substring(0,4),parseInt(strDate.substring(4,6)-1),strDate.substring(6,8),strDate.substring(9,11),strDate.substring(11,13),strDate.substring(13,15));
        instag.setAttribute("nicetitle","Added on "+dtIns.toString());
        addEvent(instag,"mouseover",showNiceTitle);
        addEvent(instag,"mouseout",hideNiceTitle);
        addEvent(instag,"focus",showNiceTitle);
        addEvent(instag,"blur",hideNiceTitle);
      }
    }
  }
}

function findPosition( oLink ) {
  if( oLink.offsetParent ) {
    for( var posX = 0, posY = 0; oLink.offsetParent; oLink = oLink.offsetParent ) {
      posX += oLink.offsetLeft;
      posY += oLink.offsetTop;
    }
    return [ posX, posY ];
  } else {
    return [ oLink.x, oLink.y ];
  }
}

function showNiceTitle(e) {
  if (CURRENT_NICE_TITLE) hideNiceTitle(CURRENT_NICE_TITLE);
  if (!document.getElementsByTagName) return;
  if (window.event && window.event.srcElement) {
    lnk = window.event.srcElement
  } else if (e && e.target) {
    lnk = e.target
  }
  if (!lnk) return;
  if (lnk.nodeType == 3) {
    // lnk is a textnode -- ascend parents until we hit a link
    lnk = getParent(lnk,"A");
  }
  if (!lnk) return;
  nicetitle = lnk.getAttribute("nicetitle");

  var d = document.createElementNS(XHTMLNS,"div");
  d.className = "nicetitle";
  tnt = document.createTextNode(nicetitle);
  pat = document.createElementNS(XHTMLNS,"p");
  pat.className = "titletext";
  pat.appendChild(tnt);
  d.appendChild(pat);
  if (lnk.href) {
    tnd = document.createTextNode(lnk.href);
    pad = document.createElementNS(XHTMLNS,"p");
    pad.className = "destination";
    pad.appendChild(tnd);
    d.appendChild(pad);
  }

  STD_WIDTH = 300;
  if (lnk.href) {
    h = lnk.href.length;
  } else { h = nicetitle.length; }
  if (nicetitle.length) {
    t = nicetitle.length;
  }
  h_pixels = h*6; t_pixels = t*10;

  if (h_pixels > STD_WIDTH) {
    w = h_pixels;
  } else if ((STD_WIDTH>t_pixels) && (t_pixels>h_pixels)) {
    w = t_pixels;
  } else if ((STD_WIDTH>t_pixels) && (h_pixels>t_pixels)) {
    w = h_pixels;
  } else {
    w = STD_WIDTH;
  }

  d.style.width = w + 'px';

  /*
  mx = lnk.offsetLeft;
  my = lnk.offsetTop;
  */
  mpos = findPosition(lnk);
  mx = mpos[0];
  my = mpos[1];
  //xy = getMousePosition(e);
  //mx = xy[0]; my = xy[1];

  d.style.left = (mx+15) + 'px';
  d.style.top = (my+35) + 'px';
  if (window.innerWidth && ((mx+w) > window.innerWidth)) {
    d.style.left = (window.innerWidth - w - 25) + "px";
  }
  if (document.body.scrollWidth && ((mx+w) > document.body.scrollWidth)) {
    d.style.left = (document.body.scrollWidth - w - 25) + "px";
  }

  document.getElementsByTagName("body")[0].appendChild(d);

  CURRENT_NICE_TITLE = d;
}

function hideNiceTitle(e) {
  if (!document.getElementsByTagName) return;
  if (CURRENT_NICE_TITLE) {
    document.getElementsByTagName("body")[0].removeChild(CURRENT_NICE_TITLE);
    CURRENT_NICE_TITLE = null;
  }
}

// Add an eventListener to browsers that can do it somehow.
// Originally by the amazing Scott Andrew.
function addEvent(obj, evType, fn){
  if (obj.addEventListener){
    obj.addEventListener(evType, fn, false);
    return true;
  } else if (obj.attachEvent){
	var r = obj.attachEvent("on"+evType, fn);
    return r;
  } else {
	return false;
  }
}

function getParent(el, pTagName) {
	 if (el == null) return null;
	 else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
		  return el;
 	else
		  return getParent(el.parentNode, pTagName);
}

function getMousePosition(event) {
  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }
  return [x,y];
}

// Determine browser and version.

function Browser() {
// blah, browser detect, but mouse-position stuff doesn't work any other way
  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}