134 lines
5.8 KiB
JavaScript
134 lines
5.8 KiB
JavaScript
var persisteduls=new Object()
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var ddtreemenu=new Object()
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ddtreemenu.closefolder="img/closed.png" //set image path to "closed" folder image
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ddtreemenu.openfolder="img/open.png" //set image path to "open" folder image
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//////////No need to edit beyond here///////////////////////////
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ddtreemenu.createTree=function(treeid, enablepersist, persistdays){
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var ultags=document.getElementById(treeid).getElementsByTagName("ul")
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if (typeof persisteduls[treeid]=="undefined")
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persisteduls[treeid]=(enablepersist==true && ddtreemenu.getCookie(treeid)!="")? ddtreemenu.getCookie(treeid).split(",") : ""
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for (var i=0; i<ultags.length; i++)
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ddtreemenu.buildSubTree(treeid, ultags[i], i)
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if (enablepersist==true){ //if enable persist feature
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var durationdays=(typeof persistdays=="undefined")? 1 : parseInt(persistdays)
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ddtreemenu.dotask(window, function(){ddtreemenu.rememberstate(treeid, durationdays)}, "unload") //save opened UL indexes on body unload
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}
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}
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ddtreemenu.buildSubTree=function(treeid, ulelement, index){
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ulelement.parentNode.className="submenu"
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if (typeof persisteduls[treeid]=="object"){ //if cookie exists (persisteduls[treeid] is an array versus "" string)
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if (ddtreemenu.searcharray(persisteduls[treeid], index)){
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ulelement.setAttribute("rel", "open")
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ulelement.style.display="block"
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ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
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}
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else
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ulelement.setAttribute("rel", "closed")
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} //end cookie persist code
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else if (ulelement.getAttribute("rel")==null || ulelement.getAttribute("rel")==false) //if no cookie and UL has NO rel attribute explicted added by user
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ulelement.setAttribute("rel", "closed")
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else if (ulelement.getAttribute("rel")=="open") //else if no cookie and this UL has an explicit rel value of "open"
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ddtreemenu.expandSubTree(treeid, ulelement) //expand this UL plus all parent ULs (so the most inner UL is revealed!)
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ulelement.parentNode.onclick=function(e){
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var submenu=this.getElementsByTagName("ul")[0]
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if (submenu.getAttribute("rel")=="closed"){
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submenu.style.display="block"
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submenu.setAttribute("rel", "open")
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ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
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}
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else if (submenu.getAttribute("rel")=="open"){
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submenu.style.display="none"
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submenu.setAttribute("rel", "closed")
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ulelement.parentNode.style.backgroundImage="url("+ddtreemenu.closefolder+")"
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}
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ddtreemenu.preventpropagate(e)
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}
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ulelement.onclick=function(e){
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ddtreemenu.preventpropagate(e)
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}
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}
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ddtreemenu.expandSubTree=function(treeid, ulelement){ //expand a UL element and any of its parent ULs
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var rootnode=document.getElementById(treeid)
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var currentnode=ulelement
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currentnode.style.display="block"
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currentnode.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
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while (currentnode!=rootnode){
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if (currentnode.tagName=="UL"){ //if parent node is a UL, expand it too
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currentnode.style.display="block"
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currentnode.setAttribute("rel", "open") //indicate it's open
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currentnode.parentNode.style.backgroundImage="url("+ddtreemenu.openfolder+")"
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}
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currentnode=currentnode.parentNode
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}
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}
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ddtreemenu.flatten=function(treeid, action){ //expand or contract all UL elements
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var ultags=document.getElementById(treeid).getElementsByTagName("ul")
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for (var i=0; i<ultags.length; i++){
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ultags[i].style.display=(action=="expand")? "block" : "none"
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var relvalue=(action=="expand")? "open" : "closed"
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ultags[i].setAttribute("rel", relvalue)
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ultags[i].parentNode.style.backgroundImage=(action=="expand")? "url("+ddtreemenu.openfolder+")" : "url("+ddtreemenu.closefolder+")"
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}
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}
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ddtreemenu.rememberstate=function(treeid, durationdays){ //store index of opened ULs relative to other ULs in Tree into cookie
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var ultags=document.getElementById(treeid).getElementsByTagName("ul")
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var openuls=new Array()
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for (var i=0; i<ultags.length; i++){
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if (ultags[i].getAttribute("rel")=="open")
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openuls[openuls.length]=i //save the index of the opened UL (relative to the entire list of ULs) as an array element
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}
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if (openuls.length==0) //if there are no opened ULs to save/persist
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openuls[0]="none open" //set array value to string to simply indicate all ULs should persist with state being closed
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ddtreemenu.setCookie(treeid, openuls.join(","), durationdays) //populate cookie with value treeid=1,2,3 etc (where 1,2... are the indexes of the opened ULs)
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}
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////A few utility functions below//////////////////////
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ddtreemenu.getCookie=function(Name){ //get cookie value
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var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
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if (document.cookie.match(re)) //if cookie found
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return document.cookie.match(re)[0].split("=")[1] //return its value
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return ""
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}
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ddtreemenu.setCookie=function(name, value, days){ //set cookei value
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var expireDate = new Date()
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//set "expstring" to either future or past date, to set or delete cookie, respectively
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var expstring=expireDate.setDate(expireDate.getDate()+parseInt(days))
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document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
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}
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ddtreemenu.searcharray=function(thearray, value){ //searches an array for the entered value. If found, delete value from array
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var isfound=false
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for (var i=0; i<thearray.length; i++){
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if (thearray[i]==value){
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isfound=true
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thearray.shift() //delete this element from array for efficiency sake
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break
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}
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}
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return isfound
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}
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ddtreemenu.preventpropagate=function(e){ //prevent action from bubbling upwards
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if (typeof e!="undefined")
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e.stopPropagation()
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else
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event.cancelBubble=true
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}
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ddtreemenu.dotask=function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
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var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
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if (target.addEventListener)
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target.addEventListener(tasktype, functionref, false)
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else if (target.attachEvent)
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target.attachEvent(tasktype, functionref)
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}
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