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popup.js
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popup.js
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// Main functionality of the plugin
async function getCurrentTab() {
let queryOptions = { active: true, lastFocusedWindow: true };
// `tab` will either be a `tabs.Tab` instance or `undefined`.
let [tab] = await chrome.tabs.query(queryOptions);
return tab;
}
// We first add the listener to the main button of the plugin popup
let extractGraph = document.getElementById('extractGraph');
extractGraph.onclick = async()=> {
let tab = await getCurrentTab();
chrome.scripting.executeScript({
target: {tabId: tab.id},
files : ['extractor.js'] // We inject the content-script
});
};
// MESSAGE MANAGEMENT
// We support these messages. For each message we specify the request object expected.
//
// - To draw a graph:
// request = {
// type : "graph",
// nodes : [ { id : "", name : "", size : "" },... ],
// edges : [ { source : "", target : ""}, ... ]
// }
//
// - To show a message in the footer:
// request = {
// type : "message",
// message : ""
// }
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
//console.log(sender.tab ? "from a content script:" + sender.tab.url : "from the extension");
//console.log(request);
if(request.type == "graph") {
// MESSAGE: A graph has been generated and has to be drawm
// We first hide the instructions
document.querySelectorAll('.instructions')[0].style.display = 'none';
// ...and show the results in the popup
document.querySelectorAll('.results')[0].style.display = 'block';
// Drawing the graph
drawGraph(request.nodes, request.edges);
// Filling extra information in the popup
document.getElementById('nodes').innerHTML = request.nodes.length; // Number of nodes
document.getElementById('edges').innerHTML = request.edges.length; // Number of edges
} else if (request.type == "message") {
// MESSAGE: There is a message to show
document.getElementById('message').innerHTML = request.message;
}
});
// GRAPH DRAWING
// We rely on D3 to render the graph. The following is therefore typical force-directed graph
// implementation in D3. The nodes and edges received have to follow the D3 expected format, thatis:
// nodes : [ { id : "", name : "", size : "" },... ],
// edges : [ { source : "", target : ""}, ... ]
// The graph is drawn in #d3graph div element of the plugin popup
function drawGraph(nodes, edges) {
// We first clean previous existing graph (if any)
d3.selectAll("svg").remove;
// The margins. No need (yet) to make these values as global variables.
var margin = {top: 10, right: 30, bottom: 30, left: 40},
width = 778 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
// Appending the svg object to the body of the page
var svg = d3.select("#d3graph")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
// Separating the main group to enable zooming (see zoomHandler)
var g = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var zoomHandler = d3.zoom()
.on("zoom", function(d) { g.attr("transform", d3.event.transform)} );
zoomHandler(svg);
// Gathering main data
var data = {
nodes : nodes,
links : edges
}
// Creating the linear scale to distribute the size of the nodes
var nodeSizeScale = d3.scaleLinear();
nodeSizeScale
.domain([0, d3.max(data.nodes, n => n.size)])
.range([5, 50]);
// The edges of the graph
// Color is hardcoded
var link = g
.selectAll("line")
.data(data.links)
.enter()
.append("line")
.style("stroke", "#aaa")
// The nodes of the graph
// Color and stroke are hardcoded. The size is calculated according to the previous scale
// Added support for drag&drop
var node = g
.selectAll("circle")
.data(data.nodes)
.enter()
.append("circle")
.attr("r", d => nodeSizeScale(d.size))
.style("fill", function(d) { if(d.color == undefined) return "#73edff"; else return d.color})
.style("stroke", "#000078")
.call(d3.drag()
.on("start", function(d) {
document.querySelectorAll(".utilBox")[0].style.backgroundColor = "#CFCFCF";
document.getElementById('downloadLinkSVG').style.pointerEvents = "none";
document.getElementById('downloadLinkGEXF').style.pointerEvents = "none";
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x; d.fy = d.y;
})
.on("drag", function(d) { d.fx = d3.event.x; d.fy = d3.event.y; })
.on("end", function(d) { if (!d3.event.active) simulation.alphaTarget(0); d.fx = null; d.fy = null; }));
// Decorating each node with a title, which includes the name of the node and the number of
// messages (i.e., the size of the node)
node.append("title")
.text(d => d.name + " (" + d.size + " message/s)");
// Main force-directed algorithm of D3 to render the graph
var simulation = d3.forceSimulation(data.nodes)
.force("link", d3.forceLink()
.id(d => d.id)
.links(data.links)
)
.force("charge", d3.forceManyBody().strength(0).distanceMax(250)) // Max distance allowed between nodes
.force("center", d3.forceCenter(width / 2, height / 2)) // Forcing the graph to be shown in the center
.force('collision', d3.forceCollide().radius(function(d) { // Forcing nodes to collide (not overlap) but
return nodeSizeScale(d.size)+25 // at radius+25 distance :)
}))
.on("tick", ticked)
.on("end", ended)
// Each iteration of the graph moves the nodes/links so we update them
function ticked() {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
node
.attr("cx", d => d.x)
.attr("cy", d => d.y);
}
// The force-directed ended, we generate the SVG
function ended() {
var utilBox = document.querySelectorAll(".utilBox")[0];
utilBox.style.backgroundColor = "#000078";
document.getElementById('downloadLinkSVG').style.pointerEvents = "auto";
generateSVG();
document.getElementById('downloadLinkGEXF').style.pointerEvents = "auto";
generateGEXF(data);
}
// Updating the table
var tr = d3.select("#reportTable").select("tbody").selectAll("tr")
.data(data.nodes)
.enter().append("tr");
var col1 = tr.append("td").text(d => d.name).style("width", "550px");
var col2 = tr.append("td").text(d => d.outDegree).style("width", "100px").style("text-align", "center");
var col3 = tr.append("td").text(d => d.inDegree).style("width", "100px").style("text-align", "center");
}
function generateSVG() {
var svgEl = document.getElementById("d3graph").querySelectorAll("svg")[0]
svgEl.setAttribute("xmlns", "http://www.w3.org/2000/svg");
var svgData = svgEl.outerHTML;
var preface = '<?xml version="1.0" standalone="no"?>\r\n';
var svgBlob = new Blob([preface, svgData], {type:"image/svg+xml;charset=utf-8"});
var svgUrl = URL.createObjectURL(svgBlob);
var downloadLinkSVG = document.getElementById('downloadLinkSVG');
downloadLinkSVG.href = svgUrl;
downloadLinkSVG.download = "graph.svg";
}
function generateGEXF(data) {
var preface = '<?xml version="1.0" encoding="UTF-8"?>\r\n' +
'<gexf xmlns="http://www.gexf.net/1.3" version="1.3" xmlns:viz="http://www.gexf.net/1.3/viz" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.gexf.net/1.3 http://www.gexf.net/1.3/gexf.xsd">\r\n' +
'\t<meta lastmodifieddate="2019-10-25">\r\n' +
'\t\t<creator>Forum Analyzer</creator>\r\n' +
'\t<description></description>\r\n' +
'\t</meta>\r\n' +
'\t<graph defaultedgetype="directed" mode="static">\r\n';
//console.log(data);
var nodes = '\t\t<nodes>\r\n';
data.nodes.forEach(function(elem) {
var node = '\t\t\t<node id="' + elem.id + '" label="' + elem.name + '">\r\n' +
'\t\t\t\t<viz:size value="' + elem.size + '"></viz:size>\r\n' +
'\t\t\t\t<viz:position x="' + elem.x + '" y="' + elem.y + '"></viz:position>\r\n' +
'\t\t\t\t<viz:color r="115" g="237" b="255"></viz:color>\r\n' +
'\t\t\t</node>\r\n';
nodes += node;
});
nodes += '\t\t</nodes>\r\n';
var edges = '\t\t<edges>\r\n';
var counter = 0;
data.links.forEach(function(elem) {
var edge = '\t\t\t<edge id="' + counter++ + '" source="' + elem.source.id + '" target="' + elem.target.id + '">\r\n' +
'\t\t\t\t<viz:color r="128" g="128" b="128"></viz:color>\r\n' +
'\t\t\t</edge>\r\n';
edges += edge;
});
edges += '\t\t</edges>\r\n';
//console.log(edges);
var postface = '\t</graph>\r\n' +
'</gexf>\r\n';
var gexfBlob = new Blob([preface, nodes, edges, postface], {type:"application/xml;charset=utf-8"});
var gexfUrl = URL.createObjectURL(gexfBlob);
var downloadLinkGEXF = document.getElementById('downloadLinkGEXF');
downloadLinkGEXF.href = gexfUrl;
downloadLinkGEXF.download = "graph.gexf";
}
// JUST FOR DEBUG
// nodes = [
// { "id" : "A", "name" : "A", "size" : 2},
// { "id" : "B", "name" : "B", "size" : 2},
// { "id" : "C", "name" : "C", "size" : 3},
// { "id" : "D", "name" : "D", "size" : 4},
// { "id" : "E", "name" : "E", "size" : 2}
// ];
// edges = [
// { "source" : "A", "target" : "B"},
// { "source" : "A", "target" : "C"},
// { "source" : "A", "target" : "D"},
// { "source" : "A", "target" : "E"},
// { "source" : "B", "target" : "D"},
// { "source" : "C", "target" : "E"},
// ];
// document.querySelectorAll('.instructions')[0].style.display = 'none';
// document.querySelectorAll('.results')[0].style.display = 'block';
// drawGraph(nodes, edges);
// document.getElementById('nodes').innerHTML = nodes.length;
// document.getElementById('edges').innerHTML = edges.length;