(function () {

    /*!
     * arborator script for dependency drawing 
     * version 1.0
     * http://arborator.ilpga.fr/
     *
     * Copyright 2010-2017, Kim Gerdes & Gaël Guibon
     *
     * This program is free software:
     * Licensed under version 3 of the GNU Affero General Public License (the "License");
     * you may not use this file except in compliance with the License. 
     * You may obtain a copy of the License at http://www.gnu.org/licenses/agpl-3.0.html
     * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
     * See the License for the specific language governing permissions and limitations under the License. 
     *
     */
    
    var drag = d3.drag();
    
    // global variables:
    fontSize = 0; // computed from css value for .token in arborator-draft.css
    lemmaHeight = 0;
    posHeight = 0;
    svgDefaultHeight = 500;
    el=10; // type of conll (10, 14, or 4), computed in conllNodesToTree
    trees=[]; // list of tree objects
    uextras=[]; // list of comments. each comment is a hashtable position(=line)->comment TODO: add this to the display
    conlltrees=[]; // list of conll strings
    defaultCat="_"
    shownfeatures=["t", "cat", "lemma","gloss"]; // recomputed in readConll
    progressiveLoading = true; // false to make it load all trees at once (may overload the browser)
    pngBtn = true;
    svgBtn = true;
    reverseMode = false; // set true for right to left conll
    conlls = {	
        10: 	{"id": 0, "t":1, "lemma": 2, "cat": 3, "xpos":4, "morph":5, "gov":6, "func":7, "xgov":8, "gloss":9}, 
        14: 	{"id": 0, "t":1, "lemma": 3, "cat": 5, "gov":9, "func":11}, 
        4: 	{"t":0, "lemma": 0, "cat": 1, "gov":2, "func":3} 
    }
    isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1; // needed for bezier bounding box bug
    
    // debug:
    log = console.log.bind(console);
    
    // TODO: add lemmas and pos!!!
    lemmaColor = '#006400';
    posColor = '#9e04de';
    
    // base 64 logo of arborator for the link image
    base64Logo = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAXCAYAAABEQGxzAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAABtQAAAbUBnmWvHAAAABl0RVh0U29mdHdhcmUAd3d3Lmlua3NjYXBlLm9yZ5vuPBoAAANXSURBVFiFtZhLbA1RGMd/59x7e5XeVrXU45aF9ztCLEQ3gojMwkZiJ7GYRDALhAUJa/FIZjk7EYKWCIMQG0qIx4JIQyREqxWP1uNyH729MxYzreu29zF3xj85mznf+X///8x3Zr4zwrZtqoWqaDXALKClggHwqYLx3jD1wWo1Ca+GVEWbAmwGFGAjECsWK22oyQkyYRsPWRLAbcAEbhim/tmLvooMqYq2HMeAAqwGZLk18USINb1RGjKSn1GLmpzgzOLfXrQBWMBjHHOmYerPyy0oakhVtGbgALANaPWioiEj2fGijmguT5mweThjkGdTsyTDlhe6fPQA54Fjhql/HStglCFV0WLAPmAvJcqpGOKJEOvej2P6r9CouZy0uT47TVdT1ittIRLASeCEYeqJ/Il/SkdVtJVAF3CEKswA1A0Kpv0ebQYgZAnaeqIs7A9XQ52PGI7GLlfzCEYMqYq2FegE4n4ytSRDiBLbsjEtaUyX3YKVIg50utoB15CqaBuBC0Ct3wxNqbGfTj7mDUSY9aN8XIWoBS64Hgj1PR1oBm5RZYkVYlDaLO6PlIyZkJV8q7Vf9dTnJAHcREAA66+du3laAvuBaQGQArDsS6TsN0cA44ZEDJgUVF4cD/sl0BYgKVfmphioLf1a7qvLca81PSPIvC7aJLAsSMZJaWk1pmVRR9+jFh3zkwwF9l74B0sk8C4AIgu4C+y2RHamgINjBaXDNu0LkiQj1fePZfAyDFwFllax2AIeABeBS4apfxyeeNd8uLVQck7A5Xkp+suUo090hoFTwE4q26A2jol2oMMw9b4icWeB9cCi4Qs3Z6forh/yJ7c0PgLHhW3bwx3CHWDiGIE28BDnSXQYpt5blloI8bbp0BNgJcD9eIb78Uxgyoto3GSY+u2RXk5VtFU4phrcgEf8NfHBa4a3kw8dwRZHXzZnMeekgpM+Gilgu2Hq7VDQnKqKthpYC7Qbpt7jJ8vryQdj3Q2i9/L8ZCwn/DCVxAdgi2Hqz4YveD7gVYpdm/dsBXkxK/8Lf9Fu+78YUhVtBfAECKxhc+H9POQXqqK14HzbgujRgjuxVgNV0SI4dT3FB42vfwq+T1oF2AC8ABqBeneMd4eFI/Yb8AXoA7qBNwT41+cPAlA7a3SX2xoAAAAASUVORK5CYII=';
    
    svgIdIndex = 0;
    
    // public initialisation function
    this.ArboratorDraft = function(visuMode = 0, reverse = false) {
        // main function called from html file
        if(reverse) reverseMode = true;
        if(visuMode==0){
            $( ".expander" ).click(function(){
                log(99,$(this).next('conll'));
                $(this).next('conll').toggle();});    
            readConll();
        }else{
            console.log('[ArboratorDraft] visumode');
            trees=[]; 
            uextras=[]; 
            conlltrees=[]; 
            $('conll').hide();
            refresh( $('#conllarea').text() );
        }
    }
    
    // public function
    ArboratorDraft.prototype.emptyThenRefresh = function(content, reverse = false, toggle = false) {	
        if(reverse) reverseMode = true; // to set reverse or not
        if(toggle) reverseMode = !reverseMode; // to toggle reverse
        empty().done( refresh( content ) );
    }
    
    
    function refresh(content) {
        $('#svgwell').html('');
        $('#svgwell').append( $("<conll></conll>").attr('id', 'transformhere').text( content ) );
        var conll = d3.selectAll('#transformhere')['_groups'][0][0];
        drawConll(conll);
        return;
    }
    
    function sleep(milliseconds) {
        var start = new Date().getTime();
        for (var i = 0; i < 1e7; i++) {
          if ((new Date().getTime() - start) > milliseconds){
            break;
          }
        }
      }
    
    function empty() {
        console.log("empty");
        var def = new jQuery.Deferred();
        clearTimeout(readInsideConllTimeout);
        treelines = [];
        $('#svgwell').html('');
        def.resolve();
        return def.promise();
    }
    
    
    function progressiveReadConll() {
        // draw each conll tags progressively (only conll tags)
        var conllLoop = d3.selectAll('conll')['_groups'][0]; // need to go out d3js to load it progressively
        var i = 0;
        function waitBetweenElements(range) {
            readConllTimeout = setTimeout(function () {
    
                drawConll(conllLoop[i]);
                i++;
                if (i < range) {
                    waitBetweenElements(range);
                }
            }, 10)
        }
    
        waitBetweenElements(conllLoop.length);
    }
    
    function progressiveReadInsideConll(trees, pnode) {
        // draw each tree INSIDE a conll progressively
        var iWait = 0;
        function waitBetweenElements(range) {
            readInsideConllTimeout = setTimeout(function () {
    
                pushAndDrawSVG(trees[iWait], pnode);
    
                iWait++;
                if (iWait < range) {
                    waitBetweenElements(range);
                }
            }, 10)
        }
        waitBetweenElements(trees.length);
    }
    
    function pushAndDrawSVG(element, pnode) {
        conlltrees.push(element);
        var data=conllNodesToTree(element);
        trees.push(data.tree);
        uextras.push(data.uextra)
        
        // add the save png button according to boolean option (default = false)
        if(pngBtn){
            var btn = pnode.insert('button').attr("class", "btn btn-primary").attr("id", "pngbtn"+svgIdIndex).html('Save PNG');
            $("#pngbtn"+svgIdIndex).click(function(){
                console.log("svgIdIndex",this.id);
                savePng(this.id);
            });
        }
    
        if(svgBtn){
            var btn = pnode.insert('button').attr("class", "btn btn-success").attr("id", "svgbtn"+svgIdIndex).html('Save SVG');
            $("#svgbtn"+svgIdIndex).click(function(){
                console.log("svgIdIndex",this.id);
                saveSvg(this.id);
            });
        }
        
        
    
        var divsvgbox = pnode.insert('div').attr("class", 'svgbox');  	
        divsvgbox.insert('div').html(data.sentence).attr("class", 'sentencebox'); 
        draw(divsvgbox, data.tree);
    
        svgIdIndex=svgIdIndex +1;
    }
    
    
    
    
    
    function readConll() {
        // reads the conll representation of the whole treebank that is in the conll field
            
        trees=[]; // list of tree objects 
        uextras=[]; // list of comments. each comment is a hashtable position(=line)->comment # TODO: show sentence features!
        conlltrees=[]; // list of conll strings, one string per tree
        
        $('conll').hide(); // to hide the huge conll data
    
        if(progressiveLoading){
            progressiveReadConll(); // progressive draw
        }else{
            d3.selectAll('conll').each(function(d){ drawConll(this); }); // all at once
        }
    
        // 	TODO: check whether this is useful: adapt which nodes should be shown depending on what we find on the first node
        // TODO : make it faster. This part is really slow
        /*firstnode=trees[0][Math.min.apply(Math,Object.keys(trees[0]))]; // take lowest existing treenode number
        shownfeatures = $.grep(shownfeatures, function (attri,i)
            { // for each shownfeatures :
            if (i < 2 || ((attri in firstnode) && firstnode[attri]!=defaultCat)) { 
                // either the first two (token and cat) or non default value:
                return true; // keep it
                }
            return false; // kick it out
        });*/
    }
    
    function drawConll(conllElement) { // for each <conll> section:
        var conll = d3.select(conllElement).attr("class", 'conll'); 
        conll.html(conll.html().trim())
        var pnode = d3.select(conllElement.parentNode);
        var toggle = false;
        pnode.insert('a').html('<img src="'+base64Logo+'" alt="Arborator" title="arborator" class="arboratorlogo">').attr('href', 'https://arborator.github.io/').attr('target', '_blank');
        var showHideConll = pnode.insert('div').html('<div class="center" fit>VIEW CONLL</div> <paper-ripple fit></paper-ripple>').attr("class", 'button raised');
    
        // <div class="button raised"> <div class="center" fit>SUBMIT</div> <paper-ripple fit></paper-ripple>  </div>
        
        var conllContent = conll.html().trim();
        conll.remove(); // remove the old conll because it's place wasn't good
        conll = pnode.insert('conll').html(conllContent).attr('class', 'conll'); //re insert to bind the content
        
        
        showHideConll.on("click", ()=>{
            log(111,toggle);
            conll.style("display", toggle ? "none" : "block");
            showHideConll.html(toggle ? '<div class="center" fit>VIEW CONLL</div> <paper-ripple fit></paper-ripple>': '<div class="center" fit>HIDE CONLL</div> <paper-ripple fit></paper-ripple>');
            toggle = !toggle;
        });
    
    
        treelines = conll.html().trim().split(/\n\s*\n\s*\n*/);	
    
        if(progressiveLoading){
            progressiveReadInsideConll(treelines, pnode);
        }else{
            for (let singleConll of treelines) { // for each conll tree at once, can block the browser
                pushAndDrawSVG(singleConll, pnode);
            }
        }
        
    }
    
    
    function conllNodesToTree(treeline) {
        // reads a conll representation of a single tree TODO: replace jquery by d3
        
        var nodes = treeline.split('\n');
        if(reverseMode)nodes.reverse();
        // nodes = nodes.reverse();
        var tree={};
        var uextra={};
        var lastid=0;
        var skipuntil=0;
        var words=[]
        $.each(nodes, function(id,nodeline){ // for each conll line:
            var nodeline=$.trim(nodeline);
            if (nodeline.charAt(0) == "#") {
                if (!(lastid in uextra)) uextra[lastid]=[];
                uextra[lastid].push(nodeline)
                return true;
            }
            var elements = nodeline.split('\t');
            el=elements.length;
    
            if (!(el in conlls) && el>10) el=10;
            if (el > 4) id=elements[conlls[el]["id"]];
            else if (elements[conlls[el]["t"]] != "_") id++;
            if (lastid!=id) // needed for the arborator encoding of multiple govs
            {
                var t=elements[conlls[el]["t"]];
                var tokids=id.split("-")
                if (tokids.length == 1) {
                    tree[id]={}
                    tree[id]["gov"]={};
                    tree[id]["t"]=t;
                    tree[id]["id"]=id;
                    tree[id]["lemma"]=elements[conlls[el]["lemma"]];
                    tree[id]["cat"]=elements[conlls[el]["cat"]];
                    if (id>skipuntil) words.push(t);
                    if (el==10) {
                        tree[id]["xpos"]=elements[conlls[el]["xpos"]];
                        tree[id]["morph"]=elements[conlls[el]["morph"]];
                        tree[id]["gloss"]=elements[conlls[el]["gloss"]];
                        if (tree[id]["gloss"]=="SpaceAfter=No"){
                            tree[id]["gloss"]="_";
                            tree[id]["NoSpaceAfter"]=false;
                        }
                        var xgov = elements[conlls[el]["xgov"]];
                        if (xgov.indexOf(':') > -1){
                            var xgovs=xgov.split("|");
                            $.each(xgovs, function(ind,xg){ 
                                // for each extra governor line:
                                var xgs=xg.split(":")
                                if (xgs.length >=2) {
                                    // if it's not just _
                                    var gov=xgs[0];
                                    var func= xgs.slice(1).join(":");
                                    tree[id]["gov"][gov]=func;
                                }
                            });
                        }
                    }
                }
                else if (tokids.length == 2){
                    skipuntil = parseInt(tokids[1])
                    words.push(elements[conlls[el]["t"]]);
                    if (!(lastid in uextra)) uextra[lastid]=[];
                    uextra[lastid].push(nodeline)
                }
                else {
                    if (!(lastid in uextra)) uextra[lastid]=[];
                    uextra[lastid].push(nodeline)
                }
            }
            gov = elements[conlls[el]["gov"]];
            if (gov!="" && gov!="_") 
            {
                if (gov==-1)
                {
                    gov = elements[conlls[el]["gov"]+1];
                }
                var func = elements[conlls[el]["func"]];
                if (func.indexOf('::') !== -1) 
                    {	
                        var stydic = func.substring(func.indexOf("::") + 1);
                        func = func.split("::")[0];
                        if (stydic!="") funcDic[func] = $.parseJSON(stydic);
                        $('#styleconllcheck').prop('checked', true);
                    };
                tree[id]["gov"][gov]=func;
                
            }
            lastid=id;
            });
        
        
        var sentence="";
        words.forEach(function (word, i) {
            sentence+=word;
            if(!reverseMode){
                if (i+1 in tree && !(("NoSpaceAfter" in tree[i+1]) && tree[i+1]["NoSpaceAfter"]==false)) sentence+=" ";
            }else{
                sentence+=" ";
            }
        });
        return {tree:tree, uextra:uextra, sentence:sentence};
    }
    
    
    function getSVGPath(startPoint,endPoint,computedStyle) {
        // startPoint and endPoint are objects for the corresponding nodes
        
        var tokDepDist = parseInt(computedStyle.getPropertyValue('--tokDepDist'));
        var depMinHeight = parseInt(computedStyle.getPropertyValue('--depMinHeight'));
        var wordDistanceFactor = parseInt(computedStyle.getPropertyValue('--wordDistanceFactor'));
        if(reverseMode) wordDistanceFactor = -Math.abs(wordDistanceFactor);
        var startOffset = parseInt(computedStyle.getPropertyValue('--startOffset'));
        if(reverseMode) startOffset = -Math.abs(startOffset);
        var startOff=(startPoint['id']-endPoint['id']>0)?-startOffset:startOffset
        var x1 = startPoint['x']+startPoint['w']/2+startOff;
        var x2 = endPoint['x']+endPoint['w']/2;
        var y1 = svgDefaultHeight-fontSize*2;
        var y2 = svgDefaultHeight-fontSize*2;
        var x1x2=Math.abs(x1-x2)/2;		
        var yy = Math.max(y1-x1x2-wordDistanceFactor*Math.abs(endPoint['id']-startPoint['id']),-tokDepDist);
        var yy = Math.min(yy,y1)-depMinHeight;
        var cstr="M"+x1+","+y1+" C"+x1+","+yy+" "+x2+","+yy+" "+x2+","+(y2-2); // -2 so that the arrow is really pointed
        //(x0,y0) is start point; (x1,y1),(x2,y2) is control points; (x3,y3) is end point.
        return {cstr:cstr,  x0:x1,y0:y1,  x1:x1,y1:yy,  x2:x2,y2:yy,x3:x2,y3:(y2-2)};
    }
    
    
    function arrowhead(x,y) {
        // gives path for arrowhead x,y startpoint (end of arrow)
        var size = 5;
        var startpoint = x+","+y; // to move the arrowhead lower: (y+size/3);
        var lefttop = "0,0" +(-size/2)+","+(-size*1.5)+" "+(-size/2)+","+(-size*1.5);
        var righttop = (size/2)+"," +(size/2)+" "+(size/2)+"," +(size/2)+ " "+(size)+",0";
        var arrowPath = "M"+ startpoint+"c"+lefttop+ "c"+righttop+ "z";
        return arrowPath;
    }
    
    
    function draw(div, tree) {
        // draws json tree on svg in div
        
        var runningWidth = 0;
        var smallestY = svgDefaultHeight;
        var treeArray = $.map(tree, function(value, index) {return [value];});
        var svg = div.append("svg:svg")
        .attr("width",  1000)
        .attr("height", svgDefaultHeight);
        var group = svg.append("g");
        // write tokens:
        if(reverseMode) treeArray.reverse();
        var eachTexts = group.selectAll("text")
            .data(treeArray)
            .enter();
    
    
            var runningWidth2 = 0;
    
        eachTexts.append('text')
            .attr("class", "token")
            .text(function(d){return d["t"];})
            .attr("id",function(d) {return d["id"];})
            .attr("x", function(d) {
                var w = this.getComputedTextLength();
                wordDistance = parseInt(getComputedStyle(this).getPropertyValue('--wordDistance'));
                var x = runningWidth; //<-- previous length to return
                runningWidth += w + wordDistance; //<-- total
                tree[d["id"]]["x"]=x;
                tree[d["id"]]["w"]=w;
                fontSize = parseInt(getComputedStyle(this).fontSize, 10);
                return x;
            })
            .attr("y", svgDefaultHeight-fontSize);	
            
        svg.attr("width", runningWidth); // adapt svg width
    
        // draw dependency links
        group.selectAll("text").each(function(d) { // for each token:
            var txt = d3.select(this); 
            for (var govid in tree[d3.select(this).attr("id")]["gov"]) { // for each governor
                x=tree[txt.attr("id")]['x']+tree[txt.attr("id")]['w']/2;
                var ligneDep = group.append("path")
                .attr("class", "curve")
                .attr("d", function (dd) {
                    if (govid==0) // sentence root:
                    {
                        var y=svgDefaultHeight-fontSize*2;
                        return "M"+x+","+(y-2)+"L"+x+","+0; // -2 so that the arrow is really pointed
                    }
                    else // normal link:
                    {	
                        pathInfo=getSVGPath(tree[govid],tree[txt.attr("id")], getComputedStyle(this))
                        return pathInfo.cstr ;
                    }
                    
                });
                group.append("path")
                .attr("class", "arrowhead")
                .attr("d", function (dd) {
                    return arrowhead(x, svgDefaultHeight - fontSize*2);
                });
                var label=tree[d3.select(this).attr("id")]["gov"][govid];
                var depLineBbox=ligneDep.node().getBBox();
                
                // TODO: move the "root" label to a good position! (possibly to a group that has to be transformed separately!)
                // TODO: handle mutliple governors!
                if (govid!=0) // normal link:
                {
                    group.append('text') 
                    .attr("class", "deprel")
                    .text(function(d){return label})
                    .attr("x", function(d) {
                        relFontSize = parseInt(getComputedStyle(this).fontSize, 10);
                        var w = this.getComputedTextLength(); //<-- length of this node
                        return depLineBbox.x + depLineBbox.width/2 - w/2})
                    .attr("y", function(d) {
                            funcCurveDist = parseInt(getComputedStyle(this).getPropertyValue('--funcCurveDist'));
                            if (isFirefox)
                            {
                                // firefox needs: stackoverflow.com/questions/24809978/calculating-the-bounding-box-of-cubic-bezier-curve
                                const {x0, y0, x1, y1, x2, y2, x3, y3} = pathInfo // firefox
                                y = bezierMinMax(x0, y0, x1, y1, x2, y2, x3, y3).min.y-funcCurveDist;
                                return y; // firefox
                            }
                            else 
                            {
                                // standard Chrome etc
                                y = depLineBbox.y-funcCurveDist
                                return y; 
                            }
                        })
                    // if not root, check how high we got:
                    var smallY = y-relFontSize
                    smallestY = smallY < smallestY ? smallY : smallestY;
                    
                }
            }
            // txt.on("click", started);
            txt.on("drag", function(d){console.log('draggg')});
        });	
    
    
        // write lemmas
        eachTexts.append('text')
            .attr("class", "lemma")
            .text(function(d){return d["lemma"];})
            .attr("id",function(d) {return d["id"];})
            .attr("x", function(d) {
                var lemmaLength = this.getComputedTextLength();
                var w = tree[d["id"]]["w"];
                wordDistance = parseInt(getComputedStyle(this).getPropertyValue('--wordDistance'));
                var x = tree[d["id"]]["x"] ; //<-- previous length to return
                lemmaHeight = parseInt(getComputedStyle(this).fontSize, 20);
                return x;
            })
            .attr("y", svgDefaultHeight-fontSize+lemmaHeight);
    
        // write pos
        eachTexts.append('text')
            .attr("class", "postag")
            .text(function(d){return d["cat"];})
            .attr("id",function(d) {return d["id"];})
            .attr("x", function(d) {
                var posLength = this.getComputedTextLength();
                var w = tree[d["id"]]["w"];
                wordDistance = parseInt(getComputedStyle(this).getPropertyValue('--wordDistance'));
                if(posLength>w+10){
                    var x = tree[d["id"]]["x"] - posLength/3 ; //<-- previous length to return
                }else{
                    var x = tree[d["id"]]["x"] ; //<-- previous length to return
                }
                posHeight = parseInt(getComputedStyle(this).fontSize, 20);
                return x;
            })
            .attr("y", svgDefaultHeight-fontSize+lemmaHeight+posHeight);
    
    
        group.attr("transform", "translate(" + 0 + "," + (-smallestY) + ")");
        svg.attr("height", svgDefaultHeight-smallestY+posHeight+lemmaHeight+fontSize); // adapt svg height
    
        svg.attr("id", "svg"+svgIdIndex);
        svg.attr("version", '1.1'); // to prepare ddl of svg
        svg.attr("xmlns", "http://www.w3.org/2000/svg"); // to prepare ddl of svg
    }
    
    
    //(x0,y0) is start point; (x1,y1),(x2,y2) is control points; (x3,y3) is end point.
    function bezierMinMax(x0, y0, x1, y1, x2, y2, x3, y3) {
        var tvalues = [], xvalues = [], yvalues = [],
            a, b, c, t, t1, t2, b2ac, sqrtb2ac;
        for (var i = 0; i < 2; ++i) {
            if (i == 0) {
                b = 6 * x0 - 12 * x1 + 6 * x2;
                a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
                c = 3 * x1 - 3 * x0;
            } else {
                b = 6 * y0 - 12 * y1 + 6 * y2;
                a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
                c = 3 * y1 - 3 * y0;
            }
            if (Math.abs(a) < 1e-12) {
                if (Math.abs(b) < 1e-12) {
                    continue;
                }
                t = -c / b;
                if (0 < t && t < 1) {
                    tvalues.push(t);
                }
                continue;
            }
            b2ac = b * b - 4 * c * a;
            if (b2ac < 0) {
                continue;
            }
            sqrtb2ac = Math.sqrt(b2ac);
            t1 = (-b + sqrtb2ac) / (2 * a);
            if (0 < t1 && t1 < 1) {
                tvalues.push(t1);
            }
            t2 = (-b - sqrtb2ac) / (2 * a);
            if (0 < t2 && t2 < 1) {
                tvalues.push(t2);
            }
        }
    
        var j = tvalues.length, mt;
        while (j--) {
            t = tvalues[j];
            mt = 1 - t;
            xvalues[j] = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t * x3);
            yvalues[j] = (mt * mt * mt * y0) + (3 * mt * mt * t * y1) + (3 * mt * t * t * y2) + (t * t * t * y3);
        }
    
        xvalues.push(x0,x3);
        yvalues.push(y0,y3);
    
        return {
            min: {x: Math.min.apply(0, xvalues), y: Math.min.apply(0, yvalues)},
            max: {x: Math.max.apply(0, xvalues), y: Math.max.apply(0, yvalues)}
        };
    }
    
    function svg2Data(svg) {
        var tempCSS = document.createElement("style");
        tempCSS.innerHTML = '.token {  font: 18px DejaVu Sans;  fill: black;  font-family:sans-serif;   text-align: center; }   .lemma {  font: 15px DejaVu Sans;  fill: black;  font-family:sans-serif;  text-align: center;  font-style: italic; }   .postag {  font: 11px DejaVu Sans;  fill: #E03737;   text-align: center; }   .deprel {  font: 12px Arial;  fill: #1d2ec1;  font-style: oblique;  font-family:sans-serif;  }   .arrowhead {  fill: white;  stroke: black;  stroke-width: .8; }  .curve {  stroke: black;  stroke-width: 1;  fill: none;     .arboratorlogo {  transition: all 0.4s ease-in-out;  -webkit-transition: all 0.4s ease-in-out;   }    .arboratorlogo:hover {  transform: scale(1.1);     transition: all 0.2s ease-in-out;  -webkit-transition: all 0.2s ease-in-out;  opacity: .9;   }   .svgbox {   overflow-x: auto;  }"';
        svg.appendChild(tempCSS);
        return svg.outerHTML;
    }
    
    function png2Data(svg) {
        var canvas = document.createElement('canvas');
        var tempCSS = document.createElement("style");
        tempCSS.innerHTML = '.token {  font: 18px DejaVu Sans;  fill: black;  font-family:sans-serif;   text-align: center; }   .lemma {  font: 15px DejaVu Sans;  fill: black;  font-family:sans-serif;  text-align: center;  font-style: italic; }   .postag {  font: 11px DejaVu Sans;  fill: #E03737;   text-align: center; }   .deprel {  font: 12px Arial;  fill: #1d2ec1;  font-style: oblique;  font-family:sans-serif;  }   .arrowhead {  fill: white;  stroke: black;  stroke-width: .8; }  .curve {  stroke: black;  stroke-width: 1;  fill: none;}';
        svg.insertBefore(tempCSS, svg.firstChild);	// === the missing prepend option
    
        var bb = svg.getBBox();
        // canvas.height = bb.height*5;
        // canvas.width = bb.width*5;
        // svg.width = svg.width*3;
        // svg.height = svg.height*3;
        // svg.setAttribute('width', bb.width*5);
        // svg.setAttribute('height', bb.height*5);
        var data = (new XMLSerializer()).serializeToString(svg);
        console.log('svgData', data);
        canvg(canvas, data);
        return canvas.toDataURL().replace('data:image/png;base64,','');
        
    }
    
    function savePng(btnId) {
        var id = btnId.replace("pngbtn","");
        var canvas = document.createElement('canvas');
        var tempCSS = document.createElement("style");
        tempCSS.innerHTML = '.token {  font: 18px DejaVu Sans;  fill: black;  font-family:sans-serif;   text-align: center; }   .lemma {  font: 15px DejaVu Sans;  fill: black;  font-family:sans-serif;  text-align: center;  font-style: italic; }   .postag {  font: 11px DejaVu Sans;  fill: #E03737;   text-align: center; }   .deprel {  font: 12px Arial;  fill: #1d2ec1;  font-style: oblique;  font-family:sans-serif;  }   .arrowhead {  fill: white;  stroke: black;  stroke-width: .8; }  .curve {  stroke: black;  stroke-width: 1;  fill: none;}';
        var svg = document.getElementById("svg"+id);
        svg.appendChild(tempCSS);
        var bb = svg.getBBox();
        canvas.height = bb.height*5;
        canvas.width = bb.width*5;
        var ctx = canvas.getContext('2d');
        var data = (new XMLSerializer()).serializeToString(svg);
        var DOMURL = window.URL || window.webkitURL || window;
        var img = new Image(); 
        var svgBlob = new Blob([data], {type: 'image/svg+xml;charset=utf-8'});
        var url = DOMURL.createObjectURL(svgBlob);
        img.onload = function () {
            ctx.drawImage(img, 0, 0, canvas.width, canvas.height);//, 0, 0, ctx.width, ctx.height);
            DOMURL.revokeObjectURL(url);
            var imgURI = canvas
                .toDataURL('image/png')
                .replace('image/png', 'image/octet-stream');
            var evt = new MouseEvent('click', {
                view: window,
                bubbles: false,
                cancelable: true
            });
            var a = document.createElement('a');
            a.setAttribute('download', 'svg'+id+'.png');
            a.setAttribute('href', imgURI );
            a.setAttribute('target', '_blank');
            a.dispatchEvent(evt);
        };
        img.src = url;
    }
    
    function saveSvg(btnId) {
        console.log(btnId);
        var id = btnId.replace("svgbtn","");
        var canvas = document.createElement('canvas');
        console.log("canvas", canvas);
        
    
        var tempCSS = document.createElement("style");
        tempCSS.innerHTML = '.token {  font: 18px DejaVu Sans;  fill: black;  font-family:sans-serif;   text-align: center; }   .lemma {  font: 15px DejaVu Sans;  fill: black;  font-family:sans-serif;  text-align: center;  font-style: italic; }   .postag {  font: 11px DejaVu Sans;  fill: #E03737;   text-align: center; }   .deprel {  font: 12px Arial;  fill: #1d2ec1;  font-style: oblique;  font-family:sans-serif;  }   .arrowhead {  fill: white;  stroke: black;  stroke-width: .8; }  .curve {  stroke: black;  stroke-width: 1;  fill: none;     .arboratorlogo {  transition: all 0.4s ease-in-out;  -webkit-transition: all 0.4s ease-in-out;   }    .arboratorlogo:hover {  transform: scale(1.1);     transition: all 0.2s ease-in-out;  -webkit-transition: all 0.2s ease-in-out;  opacity: .9;   }   .svgbox {   overflow-x: auto;  }" width="1140" height="470.1878970357652"';
    
        var svg = document.getElementById("svg"+id);
        svg.appendChild(tempCSS);
    
        var svgData = svg.outerHTML;
        var svgBlob = new Blob([svgData], {type:"image/svg+xml;charset=utf-8"});
        var svgUrl = URL.createObjectURL(svgBlob);
        var downloadLink = document.createElement("a");
        downloadLink.href = svgUrl;
        downloadLink.download = "treeSvg"+id+".svg";
        document.body.appendChild(downloadLink);
        downloadLink.click();
        document.body.removeChild(downloadLink);
        
    }
    
    
    function exportPngZip() {
        var zip = new JSZip();
        var folder = zip.folder("pngfiles");
        var svgList = $('svg');
        var svgD3List = window.d3.selectAll("svg");
        console.log(2222,svgD3List);
        $.each( svgD3List['_groups'][0], function( index, value ){
            console.log('value', index, value);
            var pngData = png2Data(value);
            folder.file('tree'+value.id+'.png', pngData, {base64: true});
        });
        zip.generateAsync({type:"blob"})
            .then(function(content) {
                saveAs(content, "export.zip");
        });
    }
    
    function exportSvgZip() {
        var zip = new JSZip();
        var folder = zip.folder("svgfiles");
        var svgList = $('svg');
        $.each( svgList, function( index, value ){
            var svgData = svg2Data(value);
            folder.file('tree'+svg.id+'.svg', svgData);
        });
    
        zip.generateAsync({type:"blob"})
            .then(function(content) {
                saveAs(content, "export.zip");
        });
    }
    
    $("#btnSvgZip").on("click", function (){
        exportSvgZip();
    });
    
    $("#btnPngZip").on("click", function (){
        exportPngZip();
    });
    
    
    }());