/*
 * utils.js
 *
 * Version: $Revision: 1.7 $
 *
 * Date: $Date: 2006/09/19 09:12:17 $
 *
 * Copyright (c) 2004, Hewlett-Packard Company and Massachusetts
 * Institute of Technology.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Hewlett-Packard Company nor the name of the
 * Massachusetts Institute of Technology nor the names of their
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

/*
 * Utility Javascript methods for DSpace
 */

// Popup window - here so it can be referred to by several methods
var popupWindow;

// =========================================================
//  Methods for e-person popup window
// =========================================================

// Add to list of e-people on this page -- invoked by eperson popup window
function addEPerson(id, email, name)
{
    var newplace = window.document.epersongroup.eperson_id.options.length;

    if (newplace > 0 && window.document.epersongroup.eperson_id.options[0].value == "")
    {
        newplace = 0;
    }

    // First we check to see if e-person is already there
    for (var i = 0; i < window.document.epersongroup.eperson_id.options.length; i++)
    {
        if (window.document.epersongroup.eperson_id.options[i].value == id)
        {
            newplace = -1;
        }
    }

    if (newplace > -1)
    {
        window.document.epersongroup.eperson_id.options[newplace] = new Option(name + " (" + email + ")", id);
    }
}

// Add to list of groups on this page -- invoked by eperson popup window
function addGroup(id, name)
{
    var newplace = window.document.epersongroup.group_ids.options.length;

	if (newplace > 0 && window.document.epersongroup.group_ids.options[0].value == "")
    {
        newplace = 0;
    }

    // First we check to see if group is already there
    for (var i = 0; i < window.document.epersongroup.group_ids.options.length; i++)
    {
        // is it in the list already
        if (window.document.epersongroup.group_ids.options[i].value == id)
        {
            newplace = -1;
        }

        // are we trying to add the new group to the new group on an Edit Group page (recursive)
        if (window.document.epersongroup.group_id)
        {
            if (window.document.epersongroup.group_id.value == id)
            {
                newplace = -1;
            }
        }
    }

    if (newplace > -1)
    {
        window.document.epersongroup.group_ids.options[newplace] = new Option(name + " (" + id + ")", id);
    }
}

// This needs to be invoked in the 'onClick' javascript event for buttons
// on pages with a dspace:selecteperson element in them
function finishEPerson()
{
    selectAll(window.document.epersongroup.eperson_id);

	if (popupWindow != null)
	{
		popupWindow.close();
	}
}

// This needs to be invoked in the 'onClick' javascript event for buttons
// on pages with a dspace:selecteperson element in them
function finishGroups()
{
    selectAll(window.document.epersongroup.group_ids);

    if (popupWindow != null)
    {
		popupWindow.close();
    }
}

// =========================================================
//  Miscellaneous utility methods
// =========================================================

// Open a popup window (or bring to front if already open)
function popup_window(winURL, winName)
{
    var props = 'scrollBars=yes,resizable=yes,toolbar=no,menubar=no,location=no,directories=no,width=640,height=480';
    popupWindow = window.open(winURL, winName, props);
    popupWindow.focus();
}


// Select all options in a <SELECT> list
function selectAll(sourceList)
{
    for(var i = 0; i < sourceList.options.length; i++)
    {
        if ((sourceList.options[i] != null) && (sourceList.options[i].value != ""))
            sourceList.options[i].selected = true;
    }
    return true;
}

// Deletes the selected options from supplied <SELECT> list
function removeSelected(sourceList)
{
    var maxCnt = sourceList.options.length;
    for(var i = maxCnt - 1; i >= 0; i--)
    {
        if ((sourceList.options[i] != null) && (sourceList.options[i].selected == true))
        {
            sourceList.options[i] = null;
        }
    }
}






//******************************************************
// Functions used by controlled vocabulary add-on
// There might be overlaping with existing functions
//******************************************************

function expandCollapse(node, contextPath) {
	node = node.parentNode;
	var childNode  = (node.getElementsByTagName("ul"))[0];

	if(!childNode) return false;

	var image = node.getElementsByTagName("img")[0];
	
	if(childNode.style.display != "block") {
		childNode.style.display  = "block";
		image.src = contextPath + "/image/controlledvocabulary/m.gif";
		image.alt = "Collapse search term category";
	} else {
		childNode.style.display  = "none";
		image.src = contextPath + "/image/controlledvocabulary/p.gif";
		image.alt = "Expand search term category";
	}
	
	return false;
}


function getAnchorText(ahref) {
 	if(isMicrosoft()) return ahref.childNodes.item(0).nodeValue;
	else return ahref.text;
}

function getTextValue(node) {
 	if(node.nodeName == "A") {
 		return getAnchorText(node);
 	} else {
 		return "";
 	}
 	
}


function getParentTextNode(node) {
	var parentNode = node.parentNode.parentNode.parentNode;
	var children = parentNode.childNodes;
	var textNode;
	for(var i=0; i< children.length; i++) {
		var child = children.item(i);
		if(child.className == "value") {
			return child;
		}
	}
	return null;
}

function ec(node, contextPath) {
	expandCollapse(node, contextPath);
	return false;
}


function i(node) {
	return sendBackToParentWindow(node);
}


function getChildrenByTagName(rootNode, tagName) {
	var children = rootNode.childNodes;
	var result = new Array(0);
	if(children == null) return result;
	for(var i=0; i<children.length; i++) {
		if(children[i].tagName == tagName) {
			var elementArray = new Array(1);
			elementArray[0] = children[i];
			result = result.concat(elementArray);
		}
	}
	return result;
}

function popUp(URL) {
	var page;
	page = window.open(URL, 'controlledvocabulary', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=650,height=450');
}


function isNetscape(v) {
		  return isBrowser("Netscape", v);
}
	
function isMicrosoft(v) {
		  return isBrowser("Microsoft", v);
}

function isMicrosoft() {
		  return isBrowser("Microsoft", 0);
}


function isBrowser(b,v) {
		  browserOk = false;
		  versionOk = false;

		  browserOk = (navigator.appName.indexOf(b) != -1);
		  if (v == 0) versionOk = true;
		  else  versionOk = (v <= parseInt(navigator.appVersion));
		  return browserOk && versionOk;
}

/*--------------------------------------------------------------------------*/
/*  Font size changer for DSpace
 *
/*--------------------------------------------------------------------------*/
		    						    
			function changeFont(fontsize,rootPath) {
		        
		        var fnt_normal = document.getElementById('fnt_normal');
		        var fnt_bigger = document.getElementById('fnt_bigger');
		        var fnt_biggest = document.getElementById('fnt_biggest');
		        
		        fnt_normal.style.background = 'transparent';
		        fnt_bigger.style.background = 'transparent';
		        fnt_biggest.style.background = 'transparent';
		        
		        switch (fontsize) {
		            case 'normal': 
		                document.body.style.fontSize = '12px'; 
		                SetCookie('font-size', 'normal',null,rootPath);
		                fnt_normal.style.background = '#ccc';  
		                break;
		            case 'bigger': 
		                document.body.style.fontSize = '14px'; 
		                SetCookie('font-size', 'bigger',null,rootPath); 
		                fnt_bigger.style.background = '#ccc';  
		                break;
		            case 'biggest': 
		                document.body.style.fontSize = '16px'; 
		                SetCookie('font-size', 'biggest',null,rootPath);
		                fnt_biggest.style.background = '#ccc'; 
		                break;
		        }
		    }

		    function getCookieVal (offset) { 
		        var endstr = document.cookie.indexOf (";", offset); 
		        if (endstr == -1) 
		        endstr = document.cookie.length; 
		        return unescape(document.cookie.substring(offset, endstr));
		    }

		    function GetCookie (name) { 
		        var arg = name + "="; 
		        var alen = arg.length; 
		        var clen = document.cookie.length; 
		        var last =null;
		        var i = 0; 
		        while (i < clen) { 
		            var j = i + alen; 
		            if (document.cookie.substring(i, j) == arg) last = getCookieVal (j); 
		            i = document.cookie.indexOf(" ", i) + 1; 
		            if (i == 0) break; 
		        } 
//		        alert("Get:"+last);
		        return last;
		    }

		    function SetCookie (name, value) { 
		        var argv = SetCookie.arguments; 
		        var argc = SetCookie.arguments.length; 
		        var expires = (argc > 2) ? argv[2] : null; 
		        var path = (argc > 3) ? argv[3] : null; 
		        var domain = (argc > 4) ? argv[4] : null; 
		        var secure = (argc > 5) ? argv[5] : false; 
		        document.cookie = name + "=" + escape (value) + 
		            ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + 
		            ((path == null) ? "" : ("; path=" + path)) + 
		            ((domain == null) ? "" : ("; domain=" + domain)) + 
		            ((secure == true) ? "; secure" : "");
//		        alert("Set:"+document.cookie);
		    }

	function loadPrintBasket(handleNum) {
		if (typeof(sessvars.printBasket)=='undefined') {
		  sessvars.printBasket = ",";
  		  document.images["printBasket"+handleNum].src=sessvars.contextPath+"/image/outbasket.gif";
		}
		else if (sessvars.printBasket.indexOf(","+handleNum+",") >= 0) {
			document.images["printBasket"+handleNum].src=sessvars.contextPath+"/image/inbasket.gif";
		} else {
			document.images["printBasket"+handleNum].src=sessvars.contextPath+"/image/outbasket.gif";
		}
	}

	function sizeBasket() {
		if (typeof(sessvars.printBasket)!='undefined') {
		  var j=0;
		  for (i=1;i<sessvars.printBasket.length;i++) {
		      if (sessvars.printBasket.charAt(i)==',') j++
		  }
		  return j;
		}
		return 0;
	}

	function sizePrintBasket() {
		var aSize = sizeBasket();
		var theElement = document.getElementById("sizeBasket");
		if (theElement!=null && typeof(theElement)!='undefined') {
			if (aSize == 0) {
			  theElement.innerHTML = "";
			} else {
			  theElement.innerHTML = ""+aSize;
			}
		}
		theElement = document.getElementById("delBasket");
		if (theElement!=null && typeof(theElement)!='undefined') {
			if (aSize == 0) {
			  theElement.style.display = "none";
			} else {
			  theElement.style.display = "";
			}
		}
	}

	function togglePrintBasket(handleNum) {
	    var anElement = document.images["printBasket"+handleNum];
		if (typeof(sessvars.printBasket)=='undefined') {
			if (anElement != null) {
			   anElement.src=sessvars.contextPath+"/image/inbasket.gif";
			}
			sessvars.printBasket = ","+sessvars.printBasket+handleNum+",";
		}
		else {
			pos = sessvars.printBasket.indexOf(","+handleNum+",");
			if (pos >= 0) {
				sessvars.printBasket = sessvars.printBasket.substring(0,pos)+sessvars.printBasket.substring(pos+handleNum.length+1,sessvars.printBasket.length);
				if (anElement != null) {
				   anElement.src=sessvars.contextPath+"/image/outbasket.gif";
				}
			} else {
				if (anElement != null) {
				   anElement.src=sessvars.contextPath+"/image/inbasket.gif";
				}
				sessvars.printBasket = sessvars.printBasket+handleNum+",";
			}
		}
		sizePrintBasket(handleNum);
	}
	
	function emptyPrintBasket() {
		var aSize = sizeBasket();
		if (aSize > 0) {
			if (confirm(aSize+" notice"+(aSize > 1?"s":"")+". Vider le panier d'impression ?")) {
				var origBasket = sessvars.printBasket.substring(0);
				for (i = 0;
    				 i>=0;
					 i = origBasket.indexOf(",")) {
				    oneEntry = origBasket.substring(0,i);
					origBasket = origBasket.substring(i+1);
					if (oneEntry.length > 0) {
					  togglePrintBasket(oneEntry);
					}
				}
				sessvars.printBasket = ",";
				sizePrintBasket();
			}
		}
	}
	
	function submitPrintBasket(theElement) {
		if (sizeBasket()==0) {
			return false;
		} else {
			theElement.href = sessvars.contextPath+"/printbasket.jsp?handles="+sessvars.printBasket.substring(1);
		}
	}