130 lines
4.1 KiB
JavaScript
130 lines
4.1 KiB
JavaScript
// GNU Guix --- Functional package management for GNU
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// Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
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//
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// This file is part of GNU Guix.
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//
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// GNU Guix is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or (at
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// your option) any later version.
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//
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// GNU Guix is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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var outerRadius = Math.max(nodeArray.length * 15, 500) / 2,
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innerRadius = outerRadius - Math.min(nodeArray.length * 5, 200),
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width = outerRadius * 2,
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height = outerRadius * 2,
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colors = d3.scale.category20c(),
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matrix = [];
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function neighborsOf (node) {
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return links.filter(function (e) {
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return e.source === node;
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}).map(function (e) {
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return e.target;
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});
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}
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function zoomed () {
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zoomer.attr("transform",
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"translate(" + d3.event.translate + ")" +
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"scale(" + d3.event.scale + ")");
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}
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function fade (opacity, root) {
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return function (g, i) {
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root.selectAll("g path.chord")
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.filter(function (d) {
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return d.source.index != i && d.target.index != i;
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})
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.transition()
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.style("opacity", opacity);
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};
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}
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// Now that we have all nodes in an object we can replace each reference
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// with the actual node object.
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links.forEach(function (link) {
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link.target = nodes[link.target];
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link.source = nodes[link.source];
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});
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// Construct a square matrix for package dependencies
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nodeArray.forEach(function (d, index, arr) {
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var source = index,
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row = matrix[source];
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if (!row) {
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row = matrix[source] = [];
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for (var i = -1; ++i < arr.length;) row[i] = 0;
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}
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neighborsOf(d).forEach(function (d) { row[d.index]++; });
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});
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// chord layout
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var chord = d3.layout.chord()
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.padding(0.01)
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.sortSubgroups(d3.descending)
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.sortChords(d3.descending)
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.matrix(matrix);
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var arc = d3.svg.arc()
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.innerRadius(innerRadius)
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.outerRadius(innerRadius + 20);
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var zoom = d3.behavior.zoom()
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.scaleExtent([0.1, 10])
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.on("zoom", zoomed);
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var svg = d3.select("body").append("svg")
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.attr("width", "100%")
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.attr("height", "100%")
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.attr('viewBox', '0 0 ' + Math.min(width, height) + ' ' + Math.min(width, height))
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.attr('preserveAspectRatio', 'xMinYMin')
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.call(zoom);
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var zoomer = svg.append("g");
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var container = zoomer.append("g")
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.attr("transform", "translate(" + outerRadius + "," + outerRadius + ")");
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// Group for arcs and labels
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var g = container.selectAll(".group")
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.data(chord.groups)
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.enter().append("g")
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.attr("class", "group")
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.on("mouseout", fade(1, container))
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.on("mouseover", fade(0.1, container));
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// Draw one segment per package
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g.append("path")
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.style("fill", function (d) { return colors(d.index); })
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.style("stroke", function (d) { return colors(d.index); })
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.attr("d", arc);
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// Add circular labels
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g.append("text")
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.each(function (d) { d.angle = (d.startAngle + d.endAngle) / 2; })
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.attr("dy", ".35em")
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.attr("transform", function (d) {
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return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
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+ "translate(" + (innerRadius + 26) + ")"
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+ (d.angle > Math.PI ? "rotate(180)" : "");
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})
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.style("text-anchor", function (d) { return d.angle > Math.PI ? "end" : null; })
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.text(function (d) { return nodeArray[d.index].label; });
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// Draw chords from source to target; color by source.
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container.selectAll(".chord")
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.data(chord.chords)
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.enter().append("path")
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.attr("class", "chord")
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.style("stroke", function (d) { return d3.rgb(colors(d.source.index)).darker(); })
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.style("fill", function (d) { return colors(d.source.index); })
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.attr("d", d3.svg.chord().radius(innerRadius));
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