Function jetpack

scripts/libs/d3-jetpack.js:14–147

(d3)

(function() {
        
    function jetpack(d3) {
        d3.selection.prototype.translate = function(xy) {
            return this.attr('transform', function(d,i) {
                return 'translate('+[typeof xy == 'function' ? xy(d,i) : xy]+')';
            });
        };

        d3.transition.prototype.translate = function(xy) {
            return this.attr('transform', function(d,i) {
                return 'translate('+[typeof xy == 'function' ? xy(d,i) : xy]+')';
            });
        };

        d3.selection.prototype.tspans = function(lines, lh) {
            return this.selectAll('tspan')
                .data(lines)
                .enter()
                .append('tspan')
                .text(function(d) { return d; })
                .attr('x', 0)
                .attr('dy', function(d,i) { return i ? lh || 15 : 0; });
        };

        d3.selection.prototype.append = 
        d3.selection.enter.prototype.append = function(name) {
            var n = d3_parse_attributes(name), s;
            //console.log(name, n);
            name = n.attr ? n.tag : name;
            name = d3_selection_creator(name);
            s = this.select(function() {
                return this.appendChild(name.apply(this, arguments));
            });
            return n.attr ? s.attr(n.attr) : s;
        };

        d3.selection.prototype.insert = 
        d3.selection.enter.prototype.insert = function(name, before) {
            var n = d3_parse_attributes(name), s;
            name = n.attr ? n.tag : name;
            name = d3_selection_creator(name);
            before = d3_selection_selector(before);
            s = this.select(function() {
                return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);
            });
            return n.attr ? s.attr(n.attr) : s;
        };

        var d3_parse_attributes_regex = /([\.#])/g;

        function d3_parse_attributes(name) {
            if (typeof name === "string") {
                var attr = {},
                    parts = name.split(d3_parse_attributes_regex), p;
                    name = parts.shift();
                while ((p = parts.shift())) {
                    if (p == '.') attr['class'] = attr['class'] ? attr['class'] + ' ' + parts.shift() : parts.shift();
                    else if (p == '#') attr.id = parts.shift();
                }