/*
  Copyright (C) 2005 SKYRIX Software AG

  This file is part of OpenGroupware.org.

  OGo is free software; you can redistribute it and/or modify it under
  the terms of the GNU Lesser General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.

  OGo is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with OGo; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
/* some generic JavaScript code for SOGo */

/* generic stuff */

var logConsole;
var logWindow = null;

var queryParameters;

var menus = new Array();
var search = {};
var sorting = {};

var lastClickedRow = -1;

var weekStartIsMonday = true;

// logArea = null;
var allDocumentElements = null;

var userDefaults = null;
var userSettings = null;

// Ajax requests counts
var activeAjaxRequests = 0;
var removeFolderRequestCount = 0;

/* a W3C compliant document.all */
function getAllScopeElements(scope) {
  var elements = new Array();

  for (var i = 0; i < scope.childNodes.length; i++)
    if (typeof(scope.childNodes[i]) == "object"
	&& scope.childNodes[i].tagName
	&& scope.childNodes[i].tagName != '')
      {
	elements.push(scope.childNodes[i]);
	var childElements = getAllElements(scope.childNodes[i]);
	if (childElements.length > 0)
	  elements.push(childElements);
      }

  return elements;
}

function getAllElements(scope) {
  var elements;

  if (scope == null)
    scope = document;

  if (scope == document
      && allDocumentElements != null)
    elements = allDocumentElements;
  else
    {
      elements = getAllScopeElements(scope);
      if (scope == document)
	allDocumentElements = elements;
    }

  return elements;
}

/* from
   http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/ */
function getElementsByClassName2(_tag, _class, _scope) {
  var regexp, classes, elements, element, returnElements;

  _scope = _scope || document;

  elements = (!_tag || _tag == "*"
	      ? getAllElements(null)
	      : _scope.getElementsByTagName(_tag));
  returnElements = [];

  classes = _class.split(/\s+/);
  regexp = new RegExp("(^|\s+)("+ classes.join("|") +")(\s+|$)","i");

  if (_class) {
    for(var i = 0; element = elements[i]; i++) {
      if (regexp.test(element.className)) {
	returnElements.push(element);
      }
    }
    return returnElements;
  } else {
    return elements;
  }
}

function createElement(tagName, id, classes, attributes, htmlAttributes,
		       parentNode) {
  var newElement = $(document.createElement(tagName));
  if (id)
    newElement.setAttribute("id", id);
  if (classes) {
    if (typeof(classes) == "string")
      newElement.addClassName(classes);
    else
      for (var i = 0; i < classes.length; i++)
	newElement.addClassName(classes[i]);
  }
  if (attributes)
    for (var i in attributes)
      newElement[i] = attributes[i];
  if (htmlAttributes)
    for (var i in htmlAttributes)
      newElement.setAttribute(i, htmlAttributes[i]);
  if (parentNode)
    parentNode.appendChild(newElement);

  return $(newElement);
}

function ml_stripActionInURL(url) {
  if (url[url.length - 1] != '/') {
    var i;
    
    i = url.lastIndexOf("/");
    if (i != -1) url = url.substring(0, i);
  }
  if (url[url.length - 1] != '/') // ensure trailing slash
    url = url + "/";
  return url;
}

function URLForFolderID(folderID) {
  var folderInfos = folderID.split(":");
  var url;
  if (folderInfos.length > 1) {
    url = UserFolderURL + "../" + folderInfos[0];
    if (!(folderInfos[0].endsWith('/')
	  || folderInfos[1].startsWith('/')))
      url += '/';
    url += folderInfos[1];
  }
  else
    url = ApplicationBaseURL + folderInfos[0];
   
  if (url[url.length-1] == '/')
    url = url.substr(0, url.length-1);

  return url;
}

function extractEmailAddress(mailTo) {
  var email = "";

  var emailre
    = /([a-zA-Z0-9]+[a-zA-Z0-9\._-]+[a-zA-Z0-9]+@[a-zA-Z0-9]+[a-zA-Z0-9\._-]+[a-zA-Z0-9]+)/g;
  if (emailre.test(mailTo)) {
    emailre.exec(mailTo);
    email = RegExp.$1;
  }

  return email;
}

function extractEmailName(mailTo) {
  var emailName = "";

  var tmpMailTo = mailTo.replace("&lt;", "<");
  tmpMailTo = tmpMailTo.replace("&gt;", ">");

  var emailNamere = /([ 	]+)?(.+)\ </;
  if (emailNamere.test(tmpMailTo)) {
    emailNamere.exec(tmpMailTo);
    emailName = RegExp.$2;
  }
   
  return emailName;
}

function sanitizeMailTo(dirtyMailTo) {
  var emailName = extractEmailName(dirtyMailTo);
  var email = "" + extractEmailAddress(dirtyMailTo);
   
  var mailto = "";
  if (emailName && emailName.length > 0)
    mailto = emailName + ' <' + email + '>';
  else
    mailto = email;

  return mailto;
}

function openUserFolderSelector(callback, type) {
  var urlstr = ApplicationBaseURL;
  if (! urlstr.endsWith('/'))
    urlstr += '/';
  urlstr += ("../../" + UserLogin + "/Contacts/userFolders");
  var w = window.open(urlstr, "_blank",
		      "width=322,height=250,resizable=1,scrollbars=0,location=0");
  w.opener = window;
  window.userFolderCallback = callback;
  window.userFolderType = type;
  w.focus();
}

function openContactWindow(url, wId) {
  if (typeof wId == "undefined")
    wId = "_blank";
  else {
    var r = new RegExp("[\.\/-]", "g");
    wId = wId.replace(r, "_");
  }

  var w = window.open(url, wId,
		      "width=450,height=600,resizable=0,location=0");
  w.focus();

  return w;
}

function openMailComposeWindow(url, wId) {
  var parentWindow = this;

  if (typeof wId == "undefined")
    wId = "_blank";
  else {
    var r = new RegExp("[\.\/-]", "g");
    wId = wId.replace(r, "_");
    if (document.body.hasClassName("popup"))
      parentWindow = window.opener;
  }

  var w = parentWindow.open(url, wId,
                      "width=680,height=520,resizable=1,scrollbars=1,toolbar=0,"
                      + "location=0,directories=0,status=0,menubar=0"
                      + ",copyhistory=0");

  w.focus();

  return w;
}

function openMailTo(senderMailTo) {
  var mailto = sanitizeMailTo(senderMailTo);
  if (mailto.length > 0)
    openMailComposeWindow(ApplicationBaseURL
			  + "/../Mail/compose?mailto=" + mailto);

  return false; /* stop following the link */
}

function createHTTPClient() {
  // http://developer.apple.com/internet/webcontent/xmlhttpreq.html
  if (typeof XMLHttpRequest != "undefined")
    return new XMLHttpRequest();

  try { return new ActiveXObject("Msxml2.XMLHTTP"); } 
  catch (e) { }
  try { return new ActiveXObject("Microsoft.XMLHTTP"); } 
  catch (e) { }

  return null;
}

function appendDifferentiator(url) {
  var url_nocache = url;
  var position = url.indexOf('?', 0);
  if (position < 0)
    url_nocache += '?';
  else
    url_nocache += '&';
  url_nocache += 'differentiator=' + Math.floor(Math.random()*50000);

  return url_nocache;
}

function triggerAjaxRequest(url, callback, userdata) {
  var http = createHTTPClient();

  activeAjaxRequests += 1;
  document.animTimer = setTimeout("checkAjaxRequestsState();", 50);
  //url = appendDifferentiator(url);

  if (http) {
    http.open("POST", url, true);
    http.url = url;
    http.onreadystatechange
      = function() {
      //log ("state changed (" + http.readyState + "): " + url);
      try {
	if (http.readyState == 4
	    && activeAjaxRequests > 0) {
	  if (!http.aborted) {
	    if (userdata)
	      http.callbackData = userdata;
	    callback(http);
	  }
	  activeAjaxRequests -= 1;
	  checkAjaxRequestsState();
	}
      }
      catch( e ) {
	activeAjaxRequests -= 1;
	checkAjaxRequestsState();
	log("AJAX Request, Caught Exception: " + e.name);
	log(e.message);
	log(backtrace());
      }
    };
    http.send(null);
  }
  else {
    log("triggerAjaxRequest: error creating HTTP Client!");
  }

  return http;
}

function startAnimation(parent, nextNode) {
  var anim = $("progressIndicator");
  if (anim) return anim;
  
  anim = document.createElement("img");
  anim = $(anim);
  anim.id = "progressIndicator";
  anim.src = ResourcesURL + "/busy.gif";
  anim.setStyle({ visibility: "hidden" });
  if (nextNode)
    parent.insertBefore(anim, nextNode);
  else
    parent.appendChild(anim);
  anim.setStyle({ visibility: "visible" });

  return anim;
}

function checkAjaxRequestsState() {
  var toolbar = document.getElementById("toolbar");
  if (toolbar) {
    if (activeAjaxRequests > 0
        && !document.busyAnim) {
      document.busyAnim = startAnimation(toolbar);
    }
    else if (activeAjaxRequests == 0
	     && document.busyAnim
	     && document.busyAnim.parentNode) {
      document.busyAnim.parentNode.removeChild(document.busyAnim);
      document.busyAnim = null;
    }
  }
}

function isSafari3() {
  return (navigator.appVersion.indexOf("Version") > -1);
}

function isSafari() {
  //var agt = navigator.userAgent.toLowerCase();
  //var is_safari = ((agt.indexOf('safari')!=-1)&&(agt.indexOf('mac')!=-1))?true:false;

  return (navigator.vendor == "Apple Computer, Inc.");
}

function isHttpStatus204(status) {
  return (status == 204 ||                                  // Firefox
	  (isSafari() && typeof(status) == 'undefined') ||  // Safari
          status == 1223);                                  // IE
}

function getTarget(event) {
  event = event || window.event;
  if (event.target)
    return event.target; // W3C DOM
  else
    return event.srcElement; // IE
}

function preventDefault(event) {
  if (event.preventDefault)
    event.preventDefault(); // W3C DOM
  else
    event.returnValue = false; // IE
}

function resetSelection(win) {
  var t = "";
  if (win && win.getSelection) {
    t = win.getSelection().toString();
    win.getSelection().removeAllRanges();
  }
  return t;
}

function refreshOpener() {
  if (window.opener && !window.opener.closed) {
    window.opener.location.reload();
  }
}

/* query string */

function parseQueryString() {
  var queryArray, queryDict
    var key, value, s, idx;
  queryDict.length = 0;
  
  queryDict  = new Array();
  queryArray = location.search.substr(1).split('&');
  for (var i in queryArray) {
    if (!queryArray[i]) continue ;
    s   = queryArray[i];
    idx = s.indexOf("=");
    if (idx == -1) {
      key   = s;
      value = "";
    }
    else {
      key   = s.substr(0, idx);
      value = unescape(s.substr(idx + 1));
    }
    
    if (typeof queryDict[key] == 'undefined')
      queryDict.length++;
    
    queryDict[key] = value;
  }
  return queryDict;
}

function generateQueryString(queryDict) {
  var s = "";
  for (var key in queryDict) {
    if (s.length == 0)
      s = "?";
    else
      s = s + "&";
    s = s + key + "=" + escape(queryDict[key]);
  }
  return s;
}

/* selection mechanism */

function deselectAll(parent) {
  for (var i = 0; i < parent.childNodes.length; i++) {
    var node = parent.childNodes.item(i);
    if (node.nodeType == 1)
      $(node).deselect();
  }
}

function isNodeSelected(node) {
  return $(node).hasClassName('_selected');
}

function acceptMultiSelect(node) {
  var response = false;
  var attribute = node.getAttribute('multiselect');
  if (attribute && attribute.length > 0) {
    log("node '" + node.getAttribute("id")
	+ "' is still using old-stylemultiselect!");
    response = (attribute.toLowerCase() == 'yes');
  }
  else
    response = node.multiselect;

  return response;
}

function onRowClick(event) {
  var node = getTarget(event);
  var rowIndex = null;

  if (node.tagName == 'TD') {
    node = node.parentNode; // select TR
    rowIndex = node.rowIndex - $(node).up('table').down('thead').getElementsByTagName('tr').length;  
  }
  else if (node.tagName == 'LI') {
    // Find index of clicked row
    var list = node.parentNode;
    var items = list.childNodesWithTag("li");
    for (var i = 0; i < items.length; i++) {
      if (items[i] == node) {
	rowIndex = i;
	break;
      }
    }
  }

  var initialSelection = $(node.parentNode).getSelectedNodes();
  if ((event.shiftKey == 1 || event.ctrlKey == 1)
      && (lastClickedRow >= 0)
      && (acceptMultiSelect(node.parentNode)
	  || acceptMultiSelect(node.parentNode.parentNode))) {
    if (event.shiftKey)
      $(node.parentNode).selectRange(lastClickedRow, rowIndex);
    else if (isNodeSelected(node) == true) {
      $(node).deselect();
    } else {
      $(node).select();
    }
    // At this point, should empty content of 3-pane view
  } else {
    // Single line selection
    $(node.parentNode).deselectAll();
    $(node).select();
  
    if (initialSelection != $(node.parentNode).getSelectedNodes()) {
      // Selection has changed; fire mousedown event
      var parentNode = node.parentNode;
      if (parentNode.tagName == 'TBODY')
	parentNode = parentNode.parentNode;
      if (document.createEvent) {
	var onSelectionChangeEvent;
	if (isSafari())
	  onSelectionChangeEvent = document.createEvent("UIEvents");
	else
	  onSelectionChangeEvent = document.createEvent("Events");
	onSelectionChangeEvent.initEvent("mousedown", true, true);
	parentNode.dispatchEvent(onSelectionChangeEvent);
      }
      else if (document.createEventObject) {
	parentNode.fireEvent("onmousedown");
      }
    }
  }
  lastClickedRow = rowIndex;
  
  return true;
}

/* popup menus */

// var acceptClick = false;

function popupMenu(event, menuId, target) {
  document.menuTarget = target;

  if (document.currentPopupMenu)
    hideMenu(document.currentPopupMenu);

  var popup = $(menuId);

  var deltaX = 0;
  var deltaY = 0;

  var pageContent = $("pageContent");
  if (popup.parentNode.tagName != "BODY") {
    var offset = pageContent.cascadeLeftOffset();
    deltaX = -($(popup.parentNode).cascadeLeftOffset() - offset);
    offset = pageContent.cascadeTopOffset();
    deltaY = -($(popup.parentNode).cascadeTopOffset() - offset);
  }

  var menuTop = Event.pointerY(event) + deltaY;
  var menuLeft = Event.pointerX(event) + deltaX;
  var heightDiff = (window.height()
		    - (menuTop + popup.offsetHeight));
  if (heightDiff < 0)
    menuTop += heightDiff;
  
  var leftDiff = (window.width()
		  - (menuLeft + popup.offsetWidth));
  if (leftDiff < 0)
    menuLeft -= popup.offsetWidth;

  if (popup.prepareVisibility)
    popup.prepareVisibility();
  popup.setStyle({ top: menuTop + "px",
	           left: menuLeft + "px",
	           visibility: "visible" });

  document.currentPopupMenu = popup;

  Event.observe(document.body, "click", onBodyClickMenuHandler);

  preventDefault(event);
}

function getParentMenu(node) {
  var currentNode, menuNode;

  menuNode = null;
  currentNode = node;
  var menure = new RegExp("(^|\s+)menu(\s+|$)", "i");

  while (menuNode == null
	 && currentNode)
    if (menure.test(currentNode.className))
      menuNode = currentNode;
    else
      currentNode = currentNode.parentNode;

  return menuNode;
}

function onBodyClickMenuHandler(event) {
  hideMenu(document.currentPopupMenu);
  Event.stopObserving(document.body, "click", onBodyClickMenuHandler);

  if (event)
    preventDefault(event);
}

function hideMenu(menuNode) {
  var onHide;

  if (menuNode.submenu) {
    hideMenu(menuNode.submenu);
    menuNode.submenu = null;
  }

  menuNode.setStyle({ visibility: "hidden" });
  //   menuNode.hide();
  if (menuNode.parentMenuItem) {
    Event.stopObserving(menuNode.parentMenuItem, "mouseover",
			onMouseEnteredSubmenu);
    Event.stopObserving(menuNode, "mouseover", onMouseEnteredSubmenu);
    Event.stopObserving(menuNode.parentMenuItem, "mouseout", onMouseLeftSubmenu);
    Event.stopObserving(menuNode, "mouseout", onMouseLeftSubmenu);
    Event.stopObserving(menuNode.parentMenu, "mouseover",
			onMouseEnteredParentMenu);
    $(menuNode.parentMenuItem).removeClassName("submenu-selected");
    menuNode.parentMenuItem.mouseInside = false;
    menuNode.parentMenuItem = null;
    menuNode.parentMenu.submenuItem = null;
    menuNode.parentMenu.submenu = null;
    menuNode.parentMenu = null;
  }

  if (document.createEvent) { // Safari & Mozilla
    var onhideEvent;
    if (isSafari())
      onhideEvent = document.createEvent("UIEvents");
    else
      onhideEvent = document.createEvent("Events");
    onhideEvent.initEvent("mousedown", false, true);
    menuNode.dispatchEvent(onhideEvent);
  }
  else if (document.createEventObject) { // IE
    menuNode.fireEvent("onmousedown");
  }
}

function onMenuEntryClick(event) {
  var node = event.target;

  id = getParentMenu(node).menuTarget;

  return false;
}

function parseQueryParameters(url) {
  var parameters = new Array();

  var params = url.split("?")[1];
  if (params) {
    var pairs = params.split("&");
    for (var i = 0; i < pairs.length; i++) {
      var pair = pairs[i].split("=");
      parameters[pair[0]] = pair[1];
    }
  }

  return parameters;
}

function initLogConsole() {
  var logConsole = $("logConsole");
  if (logConsole) {
    logConsole.highlighted = false;
    Event.observe(logConsole, "dblclick", onLogDblClick, false);
    logConsole.innerHTML = "";
    Event.observe(window, "keydown", onBodyKeyDown);
  }
}

function onBodyKeyDown(event) {
  if (event.keyCode == 27) {
    toggleLogConsole();
    preventDefault(event);
  }
}

function onLogDblClick(event) {
  var logConsole = $("logConsole");
  logConsole.innerHTML = "";
}

function toggleLogConsole(event) {
  var logConsole = $("logConsole");
  var display = '' + logConsole.style.display;
  if (display.length == 0) {
    logConsole.setStyle({ display: 'block' });
  } else {
    logConsole.setStyle({ display: '' });
  }
  if (event)
    preventDefault(event);
}

function log(message) {
  if (!logWindow) {
    logWindow = window;
    while (logWindow.opener)
      logWindow = logWindow.opener;
  }
  var logConsole = logWindow.document.getElementById("logConsole");
  if (logConsole) {
    logConsole.highlighted = !logConsole.highlighted;
    if (message == '\c') {
      logConsole.innerHTML = "";
      return;
    }
    var logMessage = message.replace("<", "&lt;", "g");
    logMessage = logMessage.replace(" ", "&nbsp;", "g");
    logMessage = logMessage.replace("\r\n", "<br />\n", "g");
    logMessage = logMessage.replace("\n", "<br />\n", "g");
    logMessage += '<br />' + "\n";
    if (logConsole.highlighted)
      logMessage = '<div class="highlighted">' + logMessage + '</div>';
    logConsole.innerHTML += logMessage;
  }
}

function backtrace() {
  var func = backtrace.caller;
  var str = "backtrace:\n";

  while (func)
    {
      if (func.name)
	{
	  str += "  " + func.name;
	  if (this)
            str += " (" + this + ")";
	}
      else
	str += "[anonymous]\n";

      str += "\n";
      func = func.caller;
    }
  str += "--\n";

  return str;
}

function popupSubmenu(event) {
  if (this.submenu && this.submenu != "") {
    var submenuNode = $(this.submenu);
    var parentNode = getParentMenu(this);
    if (parentNode.submenu)
      hideMenu(parentNode.submenu);
    submenuNode.parentMenuItem = this;
    submenuNode.parentMenu = parentNode;
    parentNode.submenuItem = this;
    parentNode.submenu = submenuNode;

    if (submenuNode.prepareVisibility)
      submenuNode.prepareVisibility();

    var menuTop = (parentNode.offsetTop - 1
		   + this.offsetTop);
    if (window.height()
	< (menuTop + submenuNode.offsetHeight)
	&& submenuNode.offsetHeight < window.height())
      menuTop -= submenuNode.offsetHeight - this.offsetHeight - 4;
    var menuLeft = (parentNode.offsetLeft + parentNode.offsetWidth - 3);
    if (window.width()
	< (menuLeft + submenuNode.offsetWidth))
      menuLeft = parentNode.offsetLeft - submenuNode.offsetWidth + 3;

    this.mouseInside = true;
    Event.observe(this, "mouseover",
		  onMouseEnteredSubmenu.bindAsEventListener(this));
    Event.observe(submenuNode, "mouseover",
		  onMouseEnteredSubmenu.bindAsEventListener(submenuNode));
    Event.observe(this, "mouseout", onMouseLeftSubmenu.bindAsEventListener(this));
    Event.observe(submenuNode, "mouseout",
		  onMouseLeftSubmenu.bindAsEventListener(submenuNode));
    Event.observe(parentNode, "mouseover",
		  onMouseEnteredParentMenu.bindAsEventListener(parentNode));
    $(this).addClassName("submenu-selected");
    submenuNode.setStyle({ top: menuTop + "px",
	                   left: menuLeft + "px",
	                   visibility: "visible" });
    preventDefault(event);
  }
}

function onMouseEnteredParentMenu(event) {
  if (this.submenuItem && !this.submenuItem.mouseInside)
    hideMenu(this.submenu);
}

function onMouseEnteredSubmenu(event) {
  $(this).mouseInside = true;
}

function onMouseLeftSubmenu(event) {
  $(this).mouseInside = false;
}

/* search field */
function popupSearchMenu(event) {
  var menuId = this.getAttribute("menuid");
  var offset = Position.cumulativeOffset(this);

  relX = Event.pointerX(event) - offset[0];
  relY = Event.pointerY(event) - offset[1];

  if (event.button == 0
      && relX < 24) {
    event.cancelBubble = true;
    event.returnValue = false;

    if (document.currentPopupMenu)
      hideMenu(document.currentPopupMenu);

    var popup = $(menuId);
    offset = Position.positionedOffset(this);
    popup.setStyle({ top: this.offsetHeight + "px",
	  left: (offset[0] + 3) + "px",
	  visibility: "visible" });
  
    document.currentPopupMenu = popup;
    Event.observe(document.body, "click", onBodyClickMenuHandler);
  }
}

function setSearchCriteria(event) {
  var searchValue = $("searchValue");
  var searchCriteria = $("searchCriteria");

  searchValue.setAttribute("ghost-phrase", this.innerHTML);
  searchCriteria.value = this.getAttribute('id');
  
  if (this.parentNode.chosenNode)
    this.parentNode.chosenNode.removeClassName("_chosen");
  this.addClassName("_chosen");
  this.parentNode.chosenNode = this;
}

function checkSearchValue(event) {
  var form = event.target;
  var searchValue = $("searchValue");
  var ghostPhrase = searchValue.getAttribute('ghost-phrase');

  if (searchValue.value == ghostPhrase)
    searchValue.value = "";
}

function onSearchChange() {
  log ("onSearchChange()...");
}

function configureSearchField() {
  var searchValue = $("searchValue");
  var searchOptions = $("searchOptions");

  if (!searchValue) return;

  Event.observe(searchValue, "mousedown",
		onSearchMouseDown.bindAsEventListener(searchValue));
  Event.observe(searchValue, "click",
		popupSearchMenu.bindAsEventListener(searchValue));
  Event.observe(searchValue, "blur",
		onSearchBlur.bindAsEventListener(searchValue));
  Event.observe(searchValue, "focus",
		onSearchFocus.bindAsEventListener(searchValue));
  Event.observe(searchValue, "keydown",
		onSearchKeyDown.bindAsEventListener(searchValue));

  if (!searchOptions) return;
   
  // Set the checkmark to the first option
  var firstOption = searchOptions.down('li');
  firstOption.addClassName("_chosen");
  searchOptions.chosenNode = firstOption;
}

function onSearchMouseDown(event) {
  var superNode = this.parentNode.parentNode.parentNode;
  relX = (Event.pointerX(event) - superNode.offsetLeft - this.offsetLeft);
  relY = (Event.pointerY(event) - superNode.offsetTop - this.offsetTop);

  if (relY < 24) {
    event.cancelBubble = true;
    event.returnValue = false;
  }
}

function onSearchFocus() {
  ghostPhrase = this.getAttribute("ghost-phrase");
  if (this.value == ghostPhrase) {
    this.value = "";
    this.setAttribute("modified", "");
  } else {
    this.select();
  }

  this.setStyle({ color: "#000" });
}

function onSearchBlur(event) {
  var ghostPhrase = this.getAttribute("ghost-phrase");

  if (!this.value) {
    this.setAttribute("modified", "");
    this.setStyle({ color: "#aaa" });
    this.value = ghostPhrase;
    refreshCurrentFolder();
  } else if (this.value == ghostPhrase) {
    this.setAttribute("modified", "");
    this.setStyle({ color: "#aaa" });
  } else {
    this.setAttribute("modified", "yes");
    this.setStyle({ color: "#000" });
  }
}

function onSearchKeyDown(event) {
  if (this.timer)
    clearTimeout(this.timer);

  this.timer = setTimeout("onSearchFormSubmit()", 1000);
}

function onSearchFormSubmit(event) {
  var searchValue = $("searchValue");
  var searchCriteria = $("searchCriteria");
  var ghostPhrase = searchValue.getAttribute('ghost-phrase');
   
  if (searchValue.value == ghostPhrase) return;

  search["criteria"] = searchCriteria.value;
  search["value"] = searchValue.value;

  refreshCurrentFolder();
}

function initCriteria() {
  var searchCriteria = $("searchCriteria");
  var searchValue = $("searchValue");
 
  if (!searchValue) return;

  var searchOptions = $("searchOptions").childNodesWithTag("li");
  if (searchOptions.length > 0) {
    var firstChild = searchOptions[0];
    searchCriteria.value = $(firstChild).getAttribute('id');
    searchValue.setAttribute('ghost-phrase', firstChild.innerHTML);
    if (searchValue.value == '') {
      searchValue.value = firstChild.innerHTML;
      searchValue.setAttribute("modified", "");
      searchValue.setStyle({ color: "#aaa" });
    }
  }
}

/* toolbar buttons */
function popupToolbarMenu(node, menuId) {
  if (document.currentPopupMenu)
    hideMenu(document.currentPopupMenu);

  var popup = $(menuId);
  var top = ($(node).getStyle('top') || 0) + node.offsetHeight - 2;
  popup.setStyle({ top: top + "px",
	left: $(node).cascadeLeftOffset() + "px",
	visibility: "visible" });

  document.currentPopupMenu = popup;
  Event.observe(document.body, "click", onBodyClickMenuHandler);
}

/* contact selector */

function folderSubscriptionCallback(http) {
  if (http.readyState == 4) {
    if (isHttpStatus204(http.status)) {
      if (http.callbackData)
	http.callbackData["method"](http.callbackData["data"]);
    }
    else
      window.alert(clabels["Unable to subscribe to that folder!"]);
    document.subscriptionAjaxRequest = null;
  }
  else
    log ("folderSubscriptionCallback Ajax error");
}

function subscribeToFolder(refreshCallback, refreshCallbackData) {
  var folderData = refreshCallbackData["folder"].split(":");
  var username = folderData[0];
  var folderPath = folderData[1];
  if (username != UserLogin) {
    var url = (UserFolderURL + "../" + username
	       + folderPath + "/subscribe");
    if (document.subscriptionAjaxRequest) {
      document.subscriptionAjaxRequest.aborted = true;
      document.subscriptionAjaxRequest.abort();
    }

    var rfCbData = { method: refreshCallback, data: refreshCallbackData };
    document.subscriptionAjaxRequest = triggerAjaxRequest(url,
							  folderSubscriptionCallback,
							  rfCbData);
  }
  else
    refreshCallbackData["window"].alert(clabels["You cannot subscribe to a folder that you own!"]);
}

function folderUnsubscriptionCallback(http) {
  if (http.readyState == 4) {
    removeFolderRequestCount--;
    if (isHttpStatus204(http.status)) {
      if (http.callbackData)
	http.callbackData["method"](http.callbackData["data"]);
    }
    else
      window.alert(clabels["Unable to unsubscribe from that folder!"]);
  }
}

function unsubscribeFromFolder(folder, refreshCallback, refreshCallbackData) {
  if (document.body.hasClassName("popup")) {
    window.opener.unsubscribeFromFolder(folder, refreshCallback,
					refreshCallbackData);
  }
  else {
    var folderData = folder.split("_");
    var username = folderData[0];
    var folderPath = folderData[1];
    if (username.startsWith('/'))
      username = username.substring(1);
    if (username != UserLogin) {
      var url = (ApplicationBaseURL + folder + "/unsubscribe");
      removeFolderRequestCount++;
      var rfCbData = { method: refreshCallback, data: refreshCallbackData };
      triggerAjaxRequest(url, folderUnsubscriptionCallback, rfCbData);
    }
    else
      window.alert(clabels["You cannot unsubscribe from a folder that you own!"]);
  }
}

function accessToSubscribedFolder(serverFolder) {
  var folder;

  var parts = serverFolder.split(":");
  if (parts.length > 1) {
    var paths = parts[1].split("/");
    folder = "/" + parts[0] + "_" + paths[2];
  }
  else
    folder = serverFolder;
  
  return folder;
}

function getSubscribedFolderOwner(serverFolder) {
  var owner;
  
  var parts = serverFolder.split(":");
  if (parts.length > 1) {
    owner = parts[0];
  }
  
  return owner;
}

function listRowMouseDownHandler(event) {
  preventDefault(event);
  //Event.stop(event); 
}

/* tabs */
function initTabs() {
  var containers = document.getElementsByClassName("tabsContainer");
  for (var x = 0; x < containers.length; x++) {
    var container = containers[x];
    var firstTab = null;
    for (var i = 0; i < container.childNodes.length; i++) {
      if (container.childNodes[i].tagName == 'UL') {
	if (!firstTab)
	  firstTab = i;
      }
    }
    var nodes = container.childNodes[firstTab].childNodes;
    
    firstTab = null;
    for (var i = 0; i < nodes.length; i++) {
      var currentNode = nodes[i];
      if (currentNode.tagName == 'LI') {
	if (!firstTab)
	  firstTab = i;
	Event.observe(currentNode, "mousedown",
		      onTabMouseDown.bindAsEventListener(currentNode));
	Event.observe(currentNode, "click",
		      onTabClick.bindAsEventListener(currentNode));
	//$(currentNode.getAttribute("target")).hide();
      }
    }

    nodes[firstTab].addClassName("first");
    nodes[firstTab].addClassName("active");
    container.activeTab = nodes[firstTab];

    var target = $(nodes[firstTab].getAttribute("target"));
    target.addClassName("active");
    //target.show();
  }
}

function initMenus() {
  var menus = getMenus();
  if (menus) {
    for (var menuID in menus) {
      var menuDIV = $(menuID);
      if (menuDIV)
	initMenu(menuDIV, menus[menuID]);
    }
  }
}

function initMenu(menuDIV, callbacks) {
  var lis = $(menuDIV.childNodesWithTag("ul")[0]).childNodesWithTag("li");
  for (var j = 0; j < lis.length; j++) {
    var node = $(lis[j]);
    Event.observe(node, "mousedown",
		  listRowMouseDownHandler.bindAsEventListener(node),
		  false);
    var callback = callbacks[j];
    if (callback) {
      if (typeof(callback) == "string") {
	if (callback == "-")
	  node.addClassName("separator");
	else {
	  node.submenu = callback;
	  node.addClassName("submenu");
	  Event.observe(node, "mouseover",
			popupSubmenu.bindAsEventListener(node));
	}
      }
      else {
	Event.observe(node, "mouseup",
		      onBodyClickMenuHandler);
	Event.observe(node, "click",
		      $(callback).bindAsEventListener(node));
      }
    }
    else
      node.addClassName("disabled");
  }
}

function onTabMouseDown(event) {
  event.cancelBubble = true;
  preventDefault(event);
}

function openExternalLink(anchor) {
  return false;
}

function openAclWindow(url) {
  var w = window.open(url, "aclWindow",
                      "width=420,height=300,resizable=1,scrollbars=1,toolbar=0,"
                      + "location=0,directories=0,status=0,menubar=0"
                      + ",copyhistory=0");
  w.opener = window;
  w.focus();

  return w;
}

function getUsersRightsWindowHeight() {
  return usersRightsWindowHeight;
}

function getUsersRightsWindowWidth() {
  return usersRightsWindowWidth;
}

function getTopWindow() {
  var topWindow = null;
  var currentWindow = window;
  while (!topWindow) {
    if (currentWindow.document.body.hasClassName("popup")
	&& currentWindow.opener)
      currentWindow = currentWindow.opener;
    else
      topWindow = currentWindow;
  }

  return topWindow;
}

function onTabClick(event) {
  var node = getTarget(event); // LI element

  var target = node.getAttribute("target");

  var container = node.parentNode.parentNode;
  var oldTarget = container.activeTab.getAttribute("target");
  var content = $(target);
  var oldContent = $(oldTarget);

  oldContent.removeClassName("active");
  container.activeTab.removeClassName("active"); // previous LI
  container.activeTab = node;
  container.activeTab.addClassName("active"); // current LI
  content.addClassName("active");
  
  // Prototype alternative

  //oldContent.removeClassName("active");
  //container.activeTab.removeClassName("active"); // previous LI
  //container.activeTab = node;
  //container.activeTab.addClassName("active"); // current LI

  //container.activeTab.hide();
  //oldContent.hide();
  //content.show();

  //container.activeTab = node;
  //container.activeTab.show();

  return false;
}

function enableAnchor(anchor) {
  var classStr = '' + anchor.getAttribute("class");
  var position = classStr.indexOf("_disabled", 0);
  if (position > -1) {
    var disabledHref = anchor.getAttribute("disabled-href");
    if (disabledHref)
      anchor.setAttribute("href", disabledHref);
    var disabledOnclick = anchor.getAttribute("disabled-onclick");
    if (disabledOnclick)
      anchor.setAttribute("onclick", disabledOnclick);
    anchor.removeClassName("_disabled");
    anchor.setAttribute("disabled-href", null);
    anchor.setAttribute("disabled-onclick", null);
    anchor.disabled = 0;
    anchor.enabled = 1;
  }
}

function disableAnchor(anchor) {
  var classStr = '' + anchor.getAttribute("class");
  var position = classStr.indexOf("_disabled", 0);
  if (position < 0) {
    var href = anchor.getAttribute("href");
    if (href)
      anchor.setAttribute("disabled-href", href);
    var onclick = anchor.getAttribute("onclick");
    if (onclick)
      anchor.setAttribute("disabled-onclick", onclick);
    anchor.addClassName("_disabled");
    anchor.setAttribute("href", "#");
    anchor.setAttribute("onclick", "return false;");
    anchor.disabled = 1;
    anchor.enabled = 0;
  }
}

function d2h(d) {
  var hD = "0123456789abcdef";
  var h = hD.substr(d & 15, 1);

  while (d > 15) {
    d >>= 4;
    h = hD.substr(d & 15, 1) + h;
  }

  return h;
}

function indexColor(number) {
  var color;

  if (number == 0)
    color = "#ccf";
  else {
    var colorTable = new Array(1, 1, 1);
    
    var currentValue = number;
    var index = 0;
    while (currentValue) {
      if (currentValue & 1)
	colorTable[index]++;
      if (index == 3)
	index = 0;
      currentValue >>= 1;
      index++;
    }
    
    color = ("#"
             + d2h((256 / colorTable[2]) - 1)
             + d2h((256 / colorTable[1]) - 1)
             + d2h((256 / colorTable[0]) - 1));
  }

  return color;
}

function loadPreferences() {
  var url = UserFolderURL + "jsonDefaults";
  var http = createHTTPClient();
  http.open("GET", url, false);
  http.send("");
  if (http.status == 200) {
    if (http.responseText.length > 0)
      userDefaults = http.responseText.evalJSON(true);
    else
      userDefaults = {};
  }

  url = UserFolderURL + "jsonSettings";
  http.open("GET", url, false);
  http.send("");
  if (http.status == 200) {
    if (http.responseText.length > 0)
      userSettings = http.responseText.evalJSON(true);
    else
      userSettings = {};
  }
}

function onLoadHandler(event) {
  if (typeof UserLogin != "undefined")
    loadPreferences();
  queryParameters = parseQueryParameters('' + window.location);
  if (!$(document.body).hasClassName("popup")) {
    initLogConsole();
  }
  initCriteria();
  configureSearchField();
  initMenus();
  initTabs();
  configureDragHandles();
  configureLinkBanner();
  var progressImage = $("progressIndicator");
  if (progressImage)
    progressImage.parentNode.removeChild(progressImage);
  Event.observe(document.body, "contextmenu", onBodyClickContextMenu);
}

function onBodyClickContextMenu(event) {
  preventDefault(event);
}

function configureSortableTableHeaders(table) {
  var headers = $(table).getElementsByClassName("sortableTableHeader");
  for (var i = 0; i < headers.length; i++) {
    var header = headers[i];
    Event.observe(header, "click", onHeaderClick.bindAsEventListener(header))
      }
}

function onLinkBannerClick() {
  activeAjaxRequests++;
  checkAjaxRequestsState();
}

function onPreferencesClick(event) {
  var urlstr = UserFolderURL + "preferences";
  var w = window.open(urlstr, "_blank",
		      "width=430,height=250,resizable=0,scrollbars=0,location=0");
  w.opener = window;
  w.focus();

  preventDefault(event);
}

function configureLinkBanner() {
  var linkBanner = $("linkBanner");
  if (linkBanner) {
    var anchors = linkBanner.childNodesWithTag("a");
    for (var i = 1; i < 3; i++) {
      Event.observe(anchors[i], "mousedown", listRowMouseDownHandler);
      Event.observe(anchors[i], "click", onLinkBannerClick);
    }
    Event.observe(anchors[4], "mousedown", listRowMouseDownHandler);
    Event.observe(anchors[4], "click", onPreferencesClick);
    if (anchors.length > 5)
      Event.observe(anchors[5], "click", toggleLogConsole);
  }
}

/* folder creation */
function createFolder(name, okCB, notOkCB) {
  if (name) {
    if (document.newFolderAjaxRequest) {
      document.newFolderAjaxRequest.aborted = true;
      document.newFolderAjaxRequest.abort();
    }
    var url = ApplicationBaseURL + "/createFolder?name=" + name;
    document.newFolderAjaxRequest
      = triggerAjaxRequest(url, createFolderCallback,
			   {name: name,
			    okCB: okCB,
			    notOkCB: notOkCB});
  }
}

function createFolderCallback(http) {
  if (http.readyState == 4) {
    var data = http.callbackData;
    if (http.status == 201) {
      if (data.okCB)
	data.okCB(data.name, "/" + http.responseText, UserLogin);
    }
    else {
      if (data.notOkCB)
	data.notOkCB(name);
      else
	log("ajax problem:" + http.status);
    }
  }
}

addEvent(window, 'load', onLoadHandler);

function parent$(element) {
  return this.opener.document.getElementById(element);
}

/* stubs */
function refreshCurrentFolder() {
}

function configureDragHandles() {
}

function getMenus() {
}

function onHeaderClick(event) {
  window.alert("generic headerClick");
}