html/d3tree.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
  margin: 0;
}
.node {
  cursor: pointer;
}

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.node text {
  font: 10px sans-serif;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 1.5px;
}

</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 120, bottom: 20, left: 160},
    width = window.innerWidth - margin.right - margin.left,
    height = window.innerHeight - margin.top - margin.bottom;

var i = 0,
    duration = 250,
    root;

var tree = d3.layout.tree()
    .size([height, width]);

var diagonal = d3.svg.diagonal()
    .projection(function(d) { return [d.y, d.x]; });

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.right + margin.left)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

const url = new URLSearchParams(location.search).get('url') || '../output/https___news.polymer-project.org_/crawl.json';
console.log(url)
d3.json(url, function(error, flare) {
  if (error) {
    throw error;
  }

  root = flare;
  root.x0 = height / 2;
  root.y0 = 0;

  function collapse(d) {
    if (d.children) {
      d._children = d.children;
      d._children.forEach(collapse);
      d.children = null;
    }
  }

  root.children.forEach(collapse);
  update(root);
});

function update(source) {

  // Compute the new tree layout.
  var nodes = tree.nodes(root).reverse(),
      links = tree.links(nodes);

  // Normalize for fixed-depth.
  nodes.forEach(function(d) { d.y = d.depth * 180; });

  // Update the nodes…
  var node = svg.selectAll("g.node")
      .data(nodes, function(d) { return d.id || (d.id = ++i); });

  // Enter any new nodes at the parent's previous position.
  var nodeEnter = node.enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
      .on("click", click);

  nodeEnter.append("circle")
      .attr("r", 1e-6)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

  const text = nodeEnter.append("text")
      .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
      // .attr("x", function(d) { return 10; })
      .attr("dy", ".35em")
      .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
      // .attr("text-anchor", function(d) { return d.children || d._children ? "start" : "start"; })
      .text(function(d) {
        const url = new URL(d.url);
        //return url.href.replace(`${url.protocol}//`, '');
        // return url.pathname;
        let title =  d.title && d.title.replace('- NEWS', '');
        const trunc = 30;
        if (title && title.length > trunc)
          title = title.slice(0, trunc).trim() + '...';
        return title || d.url;
      })
      .style("fill-opacity", 1e-6);

  var images = nodeEnter.append("svg:image")
        .attr("xlink:href",  function(d) { return d.img;})
        .attr("x", function(d) { return 25;})
        .attr("y", function(d) { return -60;})
        .attr("height", 100)
        .attr("width", 100);

  // nodeEnter.append("text")
  //     .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
  //     .attr("dy", "2em")
  //     .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
  //     .text(function(d) { return d.url; })
  //     .style("fill-opacity", 1e-6);

  // Transition nodes to their new position.
  var nodeUpdate = node.transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

  nodeUpdate.select("circle")
      .attr("r", 4.5)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

  nodeUpdate.selectAll("text")
      .style("fill-opacity", 1);

  // Transition exiting nodes to the parent's new position.
  var nodeExit = node.exit().transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
      .remove();

  nodeExit.select("circle")
      .attr("r", 1e-6);

  nodeExit.select("text")
      .style("fill-opacity", 1e-6);

  // Update the links…
  var link = svg.selectAll("path.link")
      .data(links, function(d) { return d.target.id; });

  // Enter any new links at the parent's previous position.
  link.enter().insert("path", "g")
      .attr("class", "link")
      .attr("d", function(d) {
        var o = {x: source.x0, y: source.y0};
        return diagonal({source: o, target: o});
      });

  // Transition links to their new position.
  link.transition()
      .duration(duration)
      .attr("d", diagonal);

  // Transition exiting nodes to the parent's new position.
  link.exit().transition()
      .duration(duration)
      .attr("d", function(d) {
        var o = {x: source.x, y: source.y};
        return diagonal({source: o, target: o});
      })
      .remove();

  // Stash the old positions for transition.
  nodes.forEach(function(d) {
    d.x0 = d.x;
    d.y0 = d.y;
  });
}

// Toggle children on click.
function click(d) {
  if (d.children) {
    d._children = d.children;
    d.children = null;
  } else {
    d.children = d._children;
    d._children = null;
  }
  update(d);
}

</script>

</body>
</html>