1 // GNU Guix --- Functional package management for GNU
2 // Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
4 // This file is part of GNU Guix.
6 // GNU Guix is free software; you can redistribute it and/or modify it
7 // under the terms of the GNU General Public License as published by
8 // the Free Software Foundation; either version 3 of the License, or (at
9 // your option) any later version.
11 // GNU Guix is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
19 var outerRadius = Math.max(nodeArray.length * 15, 500) / 2,
20 innerRadius = outerRadius - Math.min(nodeArray.length * 5, 200),
21 width = outerRadius * 2,
22 height = outerRadius * 2,
23 colors = d3.scale.category20c(),
26 function neighborsOf (node) {
27 return links.filter(function (e) {
28 return e.source === node;
35 zoomer.attr("transform",
36 "translate(" + d3.event.translate + ")" +
37 "scale(" + d3.event.scale + ")");
40 function fade (opacity, root) {
41 return function (g, i) {
42 root.selectAll("g path.chord")
43 .filter(function (d) {
44 return d.source.index != i && d.target.index != i;
47 .style("opacity", opacity);
51 // Now that we have all nodes in an object we can replace each reference
52 // with the actual node object.
53 links.forEach(function (link) {
54 link.target = nodes[link.target];
55 link.source = nodes[link.source];
58 // Construct a square matrix for package dependencies
59 nodeArray.forEach(function (d, index, arr) {
63 row = matrix[source] = [];
64 for (var i = -1; ++i < arr.length;) row[i] = 0;
66 neighborsOf(d).forEach(function (d) { row[d.index]++; });
70 var chord = d3.layout.chord()
72 .sortSubgroups(d3.descending)
73 .sortChords(d3.descending)
76 var arc = d3.svg.arc()
77 .innerRadius(innerRadius)
78 .outerRadius(innerRadius + 20);
80 var zoom = d3.behavior.zoom()
81 .scaleExtent([0.1, 10])
84 var svg = d3.select("body").append("svg")
85 .attr("width", "100%")
86 .attr("height", "100%")
87 .attr('viewBox', '0 0 ' + Math.min(width, height) + ' ' + Math.min(width, height))
88 .attr('preserveAspectRatio', 'xMinYMin')
91 var zoomer = svg.append("g");
93 var container = zoomer.append("g")
94 .attr("transform", "translate(" + outerRadius + "," + outerRadius + ")");
96 // Group for arcs and labels
97 var g = container.selectAll(".group")
100 .attr("class", "group")
101 .on("mouseout", fade(1, container))
102 .on("mouseover", fade(0.1, container));
104 // Draw one segment per package
106 .style("fill", function (d) { return colors(d.index); })
107 .style("stroke", function (d) { return colors(d.index); })
110 // Add circular labels
112 .each(function (d) { d.angle = (d.startAngle + d.endAngle) / 2; })
114 .attr("transform", function (d) {
115 return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
116 + "translate(" + (innerRadius + 26) + ")"
117 + (d.angle > Math.PI ? "rotate(180)" : "");
119 .style("text-anchor", function (d) { return d.angle > Math.PI ? "end" : null; })
120 .text(function (d) { return nodeArray[d.index].label; });
122 // Draw chords from source to target; color by source.
123 container.selectAll(".chord")
125 .enter().append("path")
126 .attr("class", "chord")
127 .style("stroke", function (d) { return d3.rgb(colors(d.source.index)).darker(); })
128 .style("fill", function (d) { return colors(d.source.index); })
129 .attr("d", d3.svg.chord().radius(innerRadius));