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95 lines
4.8 KiB
95 lines
4.8 KiB
/*
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* Copyright (C) 2014 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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*
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* This file is part of YaCy.
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*
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* YaCy is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* YaCy is distributed in the hope that it will be useful,
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* but 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 YaCy. If not, see <http://www.gnu.org/licenses/>.
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*/
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function linkstructure(hostname, element, width, height, maxtime, maxnodes) {
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var nodes = {};
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var links = [];
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$.getJSON("api/linkstructure.json?about=" + hostname + "&maxtime=" + maxtime + "&maxnodes=" + maxnodes, function(linkstructure) {
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links = linkstructure.graph;
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links.forEach(function(link) {
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link.source = nodes[link.source] || (nodes[link.source] = {name: link.source, type:"Inbound"});
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link.target = nodes[link.target] || (nodes[link.target] = {name: link.target, type:link.type});
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});
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/* attract nodes to the center - was set with force.gravity(0.7) in d3v3 */
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var forceX = d3.forceX(width / 2).strength(0.7);
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var forceY = d3.forceY(height / 2).strength(0.7);
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var link = d3.forceLink(links).distance(60).strength(1);
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var simulation = d3.forceSimulation()
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.nodes(d3.values(nodes))
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.force('link', link)
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.force("center", d3.forceCenter(width / 2, height / 2)) // center elements - was set with size([width, height]) in d3v3
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.force('charge', d3.forceManyBody().strength(-800))
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.force('x', forceX)
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.force('y', forceY)
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.on("tick", ticked);
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var svg = d3.select(element).append("svg").attr("id", "hypertree").attr("width", width).attr("height", height);
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svg.append("defs").selectAll("marker")
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.data(["Dead", "Outbound", "Inbound"])
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.enter().append("marker")
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.attr("id", function(d) { return d; })
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.attr("viewBox", "0 -5 10 10")
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.attr("refX", 15)
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.attr("refY", -1.5)
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.attr("markerWidth", 6)
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.attr("markerHeight", 6)
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.attr("orient", "auto")
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.append("path")
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.attr("d", "M0,-5L10,0L0,5");
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svg.append("text").attr("x", 10).attr("y", 15).text(hostname).attr("style", "font-size:16px").attr("fill", "black");
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svg.append("text").attr("x", 10).attr("y", 30).text("Site Link Structure Visualization made with YaCy").attr("style", "font-size:9px").attr("fill", "black");
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svg.append("text").attr("x", 10).attr("y", 40).text(new Date()).attr("style", "font-size:9px").attr("fill", "black");
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svg.append("text").attr("x", 10).attr("y", height - 20).text("green: links to same domain").attr("style", "font-size:9px").attr("fill", "green");
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svg.append("text").attr("x", 10).attr("y", height - 10).text("blue: links to other domains").attr("style", "font-size:9px").attr("fill", "lightblue");
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svg.append("text").attr("x", 10).attr("y", height).text("red: dead links").attr("style", "font-size:9px").attr("fill", "red");
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var path = svg.append("g")
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.selectAll("path").data(link.links()).enter().append("path")
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.attr("class",function(d) {return "hypertree-link " + d.type; })
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.attr("marker-end", function(d) { return "url(#" + d.type + ")";});
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var circle = svg.append("g").selectAll("circle").data(simulation.nodes()).enter().append("circle").attr("r", 4).call(d3.drag());
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var maxTextLength = 40;
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var text = svg.append("g")
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.selectAll("text").data(simulation.nodes()).enter().append("text").attr("x", 8).attr("y", ".31em")
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.attr("style", function(d) {return d.type == "Outbound" ? "fill:#888888;" : "fill:#000000;";})
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.text(function(d) {/* Limit the length of nodes visible text to improve readability */ return d.name.substring(0, Math.min(d.name.length, maxTextLength));});
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text.append("tspan")
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.attr("class", "truncated")
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.text(function(d) {/* The end of large texts is wraped in a tspan, made visible on mouse overing */return d.name.length > maxTextLength ? d.name.substring(maxTextLength) : ""});
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text.append("tspan")
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.attr("class", "ellipsis")
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.text(function(d) {/* Add an ellipsis to mark long texts that are truncated */ return d.name.length > maxTextLength ? "..." : ""});
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function ticked() {
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path.attr("d", linkArc);
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circle.attr("transform", transform);
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text.attr("transform", transform);
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}
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function linkArc(d) {
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var dx = d.target.x - d.source.x, dy = d.target.y - d.source.y, dr = Math.sqrt(dx * dx + dy * dy);
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return "M" + d.source.x + "," + d.source.y + "A" + dr + "," + dr + " 0 0,1 " + d.target.x + "," + d.target.y;
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}
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function transform(d) {
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return "translate(" + d.x + "," + d.y + ")";
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}
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});
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};
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