var divSearchResults;
var cbMatchRelatedWords;
var searchResultsClicked = false;
var originalInnerHTML = null;

function OnResize()
{
  if (!divSearchResults)
    return;

  var divWidth;
  var divHeight;
  if (isNetscape) {
    divWidth = document.body.clientWidth - 28;
    divHeight = document.body.clientHeight-180;
  }
  else {
    divWidth = document.body.clientWidth - 25;
    divHeight = document.body.clientHeight - 170;
  }
  divSearchResults.style.width = (divWidth>0) ? divWidth+"px" : "0px";
  divSearchResults.style.height = (divHeight>0) ? divHeight+"px" : "0px";
}

function ActivateSearchStringInput()
{
  var textBox = document.getElementById("tbSearchString");
  if (textBox != null)
    try {
    textBox.focus();
    if (isIE) {
      if (textBox.createTextRange!=null) {
        var r = textBox.createTextRange();
        r.collapse(false);
        r.select();
      }
    }
    else {
      if (textBox.selectionStart!=null) {
        var end = textBox.value.length;
        textBox.setSelectionRange(end, end);
        textBox.focus();
      }
    }
  }
  catch (e) { }
}

function OnLoad()
{
  window.onresize = OnResize;
  divSearchResults = document.getElementById("divSearchResults");
  cbMatchRelatedWords = document.getElementById("cbMatchRelatedWords");
  OnResize();
  ActivateSearchStringInput();
}

function OnContentLoaded()
{
  originalInnerHTML = null;
  if (searchResultsClicked) {
    searchResultsClicked = false;
    ProcessContent();
  }
}
function SearchResults_Click()
{
  searchResultsClicked = true;
}
function ProcessContent()
{
  try {
    var doc = util.GetContentDocument(parent.GetContentFrame());
    originalInnerHTML = doc.body.innerHTML;
    Highlight(doc);
  }
  catch(e) {}
}

function OnHighlightClick()
{
  if (!originalInnerHTML)
    return;
    
  try {
    var doc = util.GetContentDocument(parent.GetContentFrame());
    var currentInnerHTML = doc.body.innerHTML;
    if (currentInnerHTML!=originalInnerHTML) {
      doc.body.innerHTML = originalInnerHTML;
      originalInnerHTML = currentInnerHTML;
    }
  }
  catch(e) {}
}

function GetSearchString()
{
  var cbHighlight = document.getElementById("cbHighlight");
  var string = document.getElementById("tbSearchString").value;
  return cbHighlight.checked && string!="" ? string : null;
}

function DisableButton(id)
{
  var btn = document.getElementById(id);
  btn.disabled = true;
}

function OnSubmitHandler(e)
{
  var textBox = document.getElementById("tbSearchString");
  if (textBox==null || textBox.value=='')
    util.CancelEvent(e);
  else
    DisableButton("btnSearch");
}

// Highlighting
// -----------------------
function Highlight(doc)
{
  var searchString = GetSearchString();
  if (searchString) {
    var cbMatchRelatedWords = document.getElementById("cbMatchRelatedWords");
    highlightSearchTerms(doc, searchString, false);
  }
}

var highlightStartTag = "<span style='color:blue; background-color:yellow;'>";
var highlightEndTag = "</span>";

function doHighlight(bodyText, searchTerm) 
{
  // find all occurences of the search term in the given text,
  // and add some "highlight" tags to them (we're not using a
  // regular expression search, because we want to filter out
  // matches that occur within HTML tags and script blocks, so
  // we have to do a little extra validation)
  var newText = "", c = "";
  var i = -1;
  var lcSearchTerm = searchTerm.toLowerCase();
  var lcBodyText = bodyText.toLowerCase();
    
  while (bodyText.length > 0) {
    i = lcBodyText.indexOf(lcSearchTerm, i+1);
    if (i < 0) {
      newText += bodyText;
      bodyText = "";
    } else {
      // skip anything inside an HTML tag
      if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
        // skip anything inside a <script> block
        if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
          // take only word beginnings into account
          c = i<=0 ? " " : bodyText.substr(i-1,1);
          if ( !((c>="A" && c<="Z") || (c>="a" && c<="z")) ) {
            newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
            bodyText = bodyText.substr(i + searchTerm.length);
            lcBodyText = bodyText.toLowerCase();
            i = -1;
          }
        }
      }
    }
  }
  
  return newText;
}

function highlightSearchTerms(doc, searchText, treatAsPhrase)
{
  if (treatAsPhrase)
    searchArray = [searchText];
  else
    searchArray = searchText.split(" ");

  if (!doc.body || typeof(doc.body.innerHTML) == "undefined") {
    return false;
  }
  
  var bodyText = doc.body.innerHTML;
  for (var i = 0; i < searchArray.length; i++) {
    if (searchArray[i]!="")
      bodyText = doHighlight(bodyText, searchArray[i]);
  }
  
  doc.body.innerHTML = bodyText;
  return true;
}