/
graph.go
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/
graph.go
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package main
import (
"encoding/json"
"log"
"net/http"
"os/exec"
"strings"
"text/template"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/ssa/ssautil"
"github.com/gophergala2016/traceapp/cha"
"github.com/gophergala2016/traceapp/node"
"github.com/gophergala2016/traceapp/rta"
"github.com/julienschmidt/httprouter"
)
func Grapher(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
repo := ps.ByName("importpath")
repo = strings.TrimLeft(repo, "/")
log.Println(repo)
_, err := exec.Command("go", "get", "-u", "-f", repo).Output()
if err != nil {
w.Write([]byte("couldn't get repo [" + repo + "]:" + err.Error()))
return
}
var conf loader.Config
conf.Import(repo)
prog, err := conf.Load()
if err != nil {
log.Fatal(err)
}
ssaProg := ssautil.CreateProgram(prog, 0)
ssaProg.Build()
var nodes []node.Node
nodes, err = rta.GetNodes(ssaProg)
if err != nil {
nodes, err = cha.GetNodes(ssaProg)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
by, err := json.Marshal(nodes)
if err != nil {
panic(err)
}
var data = struct {
Graph string
}{
Graph: string(by),
}
tmpl, _ := template.New("foo").Parse(nt)
tmpl.Execute(w, data)
}
var nt = `
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<link type="text/css" rel="stylesheet" href="/static/css/style.css"/>
<style type="text/css">
path.arc {
cursor: move;
fill: #fff;
}
.node {
font-size: 10px;
}
.node:hover {
fill: #1f77b4;
}
.link {
fill: none;
stroke: #1f77b4;
stroke-opacity: .4;
pointer-events: none;
}
.link.source, .link.target {
stroke-opacity: 1;
stroke-width: 2px;
}
.node.target {
fill: #d62728 !important;
}
.link.source {
stroke: #d62728;
}
.node.source {
fill: #2ca02c;
}
.link.target {
stroke: #2ca02c;
}
</style>
</head>
<body>
<div style="position:absolute;bottom:0;font-size:18px;">tension: <input style="position:relative;top:3px;" type="range" min="0" max="100" value="85"></div>
<script type="text/javascript" src="/static/js/d3.js"></script>
<script type="text/javascript" src="/static/js/d3.layout.js"></script>
<script type="text/javascript" src="/static/js/packages.js"></script>
<script type="text/javascript">
var win = window,
doc = document,
e = doc.documentElement,
g = doc.getElementsByTagName('body')[0],
x = win.innerWidth || e.clientWidth || g.clientWidth,
y = win.innerHeight|| e.clientHeight|| g.clientHeight;
var w = x / (5/4),
h = y / (5/4),
rx = w / 2,
ry = h / 2,
m0,
rotate = 0;
var splines = [];
var cluster = d3.layout.cluster()
.size([360, ry - 120])
.sort(function(a, b) { return d3.ascending(a.key, b.key); });
var bundle = d3.layout.bundle();
var line = d3.svg.line.radial()
.interpolate("bundle")
.tension(.85)
.radius(function(d) { return d.y; })
.angle(function(d) { return d.x / 180 * Math.PI; });
// Chrome 15 bug: <http://code.google.com/p/chromium/issues/detail?id=98951>
var div = d3.select("body").insert("div", "h2")
.style("top", "-80px")
.style("left", "-160px")
.style("width", w + "px")
.style("height", w + "px")
.style("position", "absolute")
.style("-webkit-backface-visibility", "hidden");
var svg = div.append("svg:svg")
.attr("width", w)
.attr("height", w)
.append("svg:g")
.attr("transform", "translate(" + rx + "," + ry + ")");
svg.append("svg:path")
.attr("class", "arc")
.attr("d", d3.svg.arc().outerRadius(ry - 120).innerRadius(0).startAngle(0).endAngle(2 * Math.PI))
.on("mousedown", mousedown);
classes = JSON.parse('{{ .Graph }}')
var nodes = cluster.nodes(packages.root(classes)),
links = packages.imports(nodes),
splines = bundle(links);
var path = svg.selectAll("path.link")
.data(links)
.enter().append("svg:path")
.attr("class", function(d) { return "link source-" + d.source.key + " target-" + d.target.key; })
.attr("d", function(d, i) { return line(splines[i]); });
svg.selectAll("g.node")
.data(nodes.filter(function(n) { return !n.children; }))
.enter().append("svg:g")
.attr("class", "node")
.attr("id", function(d) { return "node-" + d.key; })
.attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")"; })
.append("svg:text")
.attr("dx", function(d) { return d.x < 180 ? 8 : -8; })
.attr("dy", ".31em")
.attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
.attr("transform", function(d) { return d.x < 180 ? null : "rotate(180)"; })
.text(function(d) { return d.key; })
.on("mouseover", mouseover)
.on("mouseout", mouseout);
d3.select("input[type=range]").on("change", function() {
line.tension(this.value / 100);
path.attr("d", function(d, i) { return line(splines[i]); });
});
d3.select(window)
.on("mousemove", mousemove)
.on("mouseup", mouseup);
function mouse(e) {
return [e.pageX - rx, e.pageY - ry];
}
function mousedown() {
m0 = mouse(d3.event);
d3.event.preventDefault();
}
function mousemove() {
if (m0) {
var m1 = mouse(d3.event),
dm = Math.atan2(cross(m0, m1), dot(m0, m1)) * 180 / Math.PI;
div.style("-webkit-transform", "translateY(" + (ry - rx) + "px)rotateZ(" + dm + "deg)translateY(" + (rx - ry) + "px)");
}
}
function mouseup() {
if (m0) {
var m1 = mouse(d3.event),
dm = Math.atan2(cross(m0, m1), dot(m0, m1)) * 180 / Math.PI;
rotate += dm;
if (rotate > 360) rotate -= 360;
else if (rotate < 0) rotate += 360;
m0 = null;
div.style("-webkit-transform", null);
svg
.attr("transform", "translate(" + rx + "," + ry + ")rotate(" + rotate + ")")
.selectAll("g.node text")
.attr("dx", function(d) { return (d.x + rotate) % 360 < 180 ? 8 : -8; })
.attr("text-anchor", function(d) { return (d.x + rotate) % 360 < 180 ? "start" : "end"; })
.attr("transform", function(d) { return (d.x + rotate) % 360 < 180 ? null : "rotate(180)"; });
}
}
function mouseover(d) {
svg.selectAll("path.link.target-" + d.key)
.classed("target", true)
.each(updateNodes("source", true));
svg.selectAll("path.link.source-" + d.key)
.classed("source", true)
.each(updateNodes("target", true));
}
function mouseout(d) {
svg.selectAll("path.link.source-" + d.key)
.classed("source", false)
.each(updateNodes("target", false));
svg.selectAll("path.link.target-" + d.key)
.classed("target", false)
.each(updateNodes("source", false));
}
function updateNodes(name, value) {
return function(d) {
if (value) this.parentNode.appendChild(this);
svg.select("#node-" + d[name].key).classed(name, value);
};
}
function cross(a, b) {
return a[0] * b[1] - a[1] * b[0];
}
function dot(a, b) {
return a[0] * b[0] + a[1] * b[1];
}
</script>
</body>
</html>
`