root/java/sql-vyuka/web/strom.js

/** Strom je načítaný AJAXem až po načtení stránky, takže je potřeba funkci zavolat ručně */
//pridejUdalost(window,"load",sestavStromy);

function pridejUdalost(o, e, f) {
        if (o.addEventListener) {
                o.addEventListener(e,f,true);
                return true;
        } else if (o.attachEvent) {
                return o.attachEvent("on" + e, f);
        } else {
                return false;
        }
}

function nastavKonstantu(name, val) {
        if (typeof(window[name]) == "undefined" || window[name] == null) {
                window[name] = val;
        }
}

function rozbalStrom(treeId) {
        var ul = document.getElementById(treeId);
        if (ul == null) {
                return false;
        }
        rozbalSbalSeznam(ul, nodeOpenClass);
}

function sbalStrom(treeId) {
        var ul = document.getElementById(treeId);
        if (ul == null) {
                return false;
        }
        rozbalSbalSeznam(ul, nodeClosedClass);
}

function rozbalAzNaPolozku(treeId, itemId) {
        var ul = document.getElementById(treeId);
        if (ul == null) {
                return false;
        }
        var ret = rozbalSbalSeznam(ul, nodeOpenClass, itemId);
        if (ret) {
                var o = document.getElementById(itemId);
                if (o.scrollIntoView) {
                        o.scrollIntoView(false);
                }
        }
}

function rozbalSbalSeznam(ul, cName, itemId) {
        if(!ul.childNodes || ul.childNodes.length==0) {
                return false;
        }
        for (var itemi = 0; itemi < ul.childNodes.length; itemi++) {
                var item = ul.childNodes[itemi];

                if (itemId != null && item.id == itemId) {
                        return true;
                }

                if (item.nodeName == "LI") {
                        var subLists = false;
                        for (var sitemi = 0; sitemi<item.childNodes.length; sitemi++) {
                                var sitem = item.childNodes[sitemi];
                                if (sitem.nodeName=="UL") {
                                        subLists = true;
                                        var ret = rozbalSbalSeznam(sitem, cName, itemId);
                                        if (itemId != null && ret) {
                                                item.className = cName;
                                                return true;
                                        }
                                }
                        }

                        if (subLists && itemId == null) {
                                item.className = cName;
                        }
                }
        }
}

function sestavStromy() {
        nastavKonstantu("treeClass", "strom");
        nastavKonstantu("nodeClosedClass", "liClosed");
        nastavKonstantu("nodeOpenClass", "liOpen");
        nastavKonstantu("nodeBulletClass", "liBullet");
        nastavKonstantu("nodeLinkClass", "bullet");
        nastavKonstantu("preProcessTrees", true);
        if (preProcessTrees) {
                if (!document.createElement) {
                        return;
                }
                uls = document.getElementsByTagName("ul");
                for (var uli = 0; uli < uls.length; uli++) {
                        var ul = uls[uli];
                        if (ul.nodeName == "UL" && ul.className == treeClass) {
                                zpracujStrom(ul);
                                ul.style.display = "block";
                        }
                }
        }
}

function zpracujStrom(ul) {
        if (!ul.childNodes || ul.childNodes.length==0) {
                return;
        }
        for (var itemi = 0; itemi < ul.childNodes.length; itemi++) {
                var item = ul.childNodes[itemi];
                if (item.nodeName == "LI") {
                        var subLists = false;
                        for (var sitemi = 0; sitemi < item.childNodes.length; sitemi++) {
                                var sitem = item.childNodes[sitemi];
                                if (sitem.nodeName == "UL") {
                                        subLists = true;
                                        zpracujStrom(sitem);
                                }
                        }
                        var s = document.createElement("span");
                        var t = '\u00A0';
                        s.className = nodeLinkClass;
                        if (subLists) {
                                if (item.className == null || item.className == "") {
                                        item.className = nodeClosedClass;
                                }
                                if (item.firstChild.nodeName == "#text") {
                                        t = t + item.firstChild.nodeValue;
                                        item.removeChild(item.firstChild);
                                }
                                s.onclick = function() {
                                        this.parentNode.className = (this.parentNode.className==nodeOpenClass) ? nodeClosedClass : nodeOpenClass;
                                        return false;
                                }
                        } else {
                                item.className = nodeBulletClass;
                                s.onclick = function() {
                                        return false;
                                }
                        }
                        s.appendChild(document.createTextNode(t));
                        item.insertBefore(s, item.firstChild);
                }
        }
}