| | |
| | | --g-link-active: #5a7282; |
| | | } |
| | | </style> |
| | | {{ $js := resources.Get "js/graph.js" | resources.Fingerprint "md5" }} |
| | | <script src="{{ $js.Permalink }}"></script> |
| | | <script> |
| | | async function run() { |
| | | const { index, links, content } = await fetchData() |
| | | const curPage = {{ strings.TrimRight "/" .Page.Permalink }}.replace({{strings.TrimRight "/" .Site.BaseURL }}, "") |
| | | const pathColors = {{$.Site.Data.graphConfig.paths}} |
| | | let depth = {{$.Site.Data.graphConfig.depth}} |
| | | |
| | | const parseIdsFromLinks = (links) => [...(new Set(links.flatMap(link => ([link.source, link.target]))))] |
| | | |
| | | const neighbours = new Set() |
| | | const wl = [curPage || "/", "__SENTINEL"] |
| | | if (depth >= 0) { |
| | | while (depth >= 0 && wl.length > 0) { |
| | | // compute neighbours |
| | | const cur = wl.shift() |
| | | if (cur === "__SENTINEL") { |
| | | depth-- |
| | | wl.push("__SENTINEL") |
| | | } else { |
| | | neighbours.add(cur) |
| | | const outgoing = index.links[cur] || [] |
| | | const incoming = index.backlinks[cur] || [] |
| | | wl.push(...outgoing.map(l => l.target), ...incoming.map(l => l.source)) |
| | | } |
| | | } |
| | | } else { |
| | | parseIdsFromLinks(links).forEach(id => neighbours.add(id)) |
| | | } |
| | | |
| | | const data = { |
| | | nodes: [...neighbours].map(id => ({id})), |
| | | links: links.filter(l => neighbours.has(l.source) && neighbours.has(l.target)), |
| | | } |
| | | |
| | | const color = (d) => { |
| | | if (d.id === curPage || (d.id === "/" && curPage === "")) { |
| | | return "var(--g-node-active)" |
| | | } |
| | | |
| | | for (const pathColor of pathColors) { |
| | | const path = Object.keys(pathColor)[0] |
| | | const colour = pathColor[path] |
| | | if (d.id.startsWith(path)) { |
| | | return colour |
| | | } |
| | | } |
| | | |
| | | return "var(--g-node)" |
| | | } |
| | | |
| | | const drag = simulation => { |
| | | function dragstarted(event, d) { |
| | | if (!event.active) simulation.alphaTarget(1).restart(); |
| | | d.fx = d.x; |
| | | d.fy = d.y; |
| | | } |
| | | |
| | | function dragged(event,d) { |
| | | d.fx = event.x; |
| | | d.fy = event.y; |
| | | } |
| | | |
| | | function dragended(event,d) { |
| | | if (!event.active) simulation.alphaTarget(0); |
| | | d.fx = null; |
| | | d.fy = null; |
| | | } |
| | | |
| | | const enableDrag = {{$.Site.Data.graphConfig.enableDrag}} |
| | | const noop = () => {} |
| | | return d3.drag() |
| | | .on("start", enableDrag ? dragstarted : noop) |
| | | .on("drag", enableDrag ? dragged : noop) |
| | | .on("end", enableDrag ? dragended : noop); |
| | | } |
| | | |
| | | const height = 250 |
| | | const width = document.getElementById("graph-container").offsetWidth |
| | | |
| | | const simulation = d3.forceSimulation(data.nodes) |
| | | .force("charge", d3.forceManyBody().strength(-30)) |
| | | .force("link", d3.forceLink(data.links).id(d => d.id)) |
| | | .force("center", d3.forceCenter()); |
| | | |
| | | const svg = d3.select('#graph-container') |
| | | .append('svg') |
| | | .attr('width', width) |
| | | .attr('height', height) |
| | | .attr("viewBox", [-width / 2, -height / 2, width, height]); |
| | | |
| | | // legend |
| | | const enableLegend = {{$.Site.Data.graphConfig.enableLegend}} |
| | | if (enableLegend) { |
| | | const legend = [ |
| | | {"Current": "var(--g-node-active)"}, |
| | | {"Note": "var(--g-node)"}, |
| | | ...pathColors |
| | | ] |
| | | legend.forEach((legendEntry, i) => { |
| | | const key = Object.keys(legendEntry)[0] |
| | | const colour = legendEntry[key] |
| | | svg.append("circle").attr("cx", -width/2 + 20).attr("cy", height/2 - 30 * (i+1)).attr("r", 6).style("fill", colour) |
| | | svg.append("text").attr("x", -width/2 + 40).attr("y", height/2 - 30 * (i+1)).text(key).style("font-size", "15px").attr("alignment-baseline","middle") |
| | | }) |
| | | } |
| | | |
| | | // draw links between nodes |
| | | const link = svg.append("g") |
| | | .selectAll("line") |
| | | .data(data.links) |
| | | .join("line") |
| | | .attr("class", "link") |
| | | .attr("stroke", "var(--g-link)") |
| | | .attr("stroke-width", 2) |
| | | .attr("data-source", d => d.source.id) |
| | | .attr("data-target", d => d.target.id) |
| | | |
| | | // svg groups |
| | | const graphNode = svg.append("g") |
| | | .selectAll("g") |
| | | .data(data.nodes) |
| | | .enter().append("g") |
| | | |
| | | // draw individual nodes |
| | | const node = graphNode.append("circle") |
| | | .attr("class", "node") |
| | | .attr("id", (d) => d.id) |
| | | .attr("r", (d) => { |
| | | const numOut = index.links[d.id]?.length || 0 |
| | | const numIn = index.backlinks[d.id]?.length || 0 |
| | | return 3 + (numOut + numIn) / 4 |
| | | }) |
| | | .attr("fill", color) |
| | | .style("cursor", "pointer") |
| | | .on("click", (_, d) => { |
| | | window.location.href = {{.Site.BaseURL}} + decodeURI(d.id).replace(/\s+/g, '-') |
| | | }) |
| | | .on("mouseover", function (_, d) { |
| | | d3.selectAll(".node") |
| | | .transition() |
| | | .duration(100) |
| | | .attr("fill", "var(--g-node-inactive)") |
| | | |
| | | const neighbours = parseIdsFromLinks([...(index.links[d.id] || []), ...(index.backlinks[d.id] || [])]) |
| | | const neighbourNodes = d3.selectAll(".node").filter(d => neighbours.includes(d.id)) |
| | | const currentId = d.id |
| | | const linkNodes = d3.selectAll(".link").filter(d => d.source.id === currentId || d.target.id === currentId) |
| | | |
| | | // highlight neighbour nodes |
| | | neighbourNodes |
| | | .transition() |
| | | .duration(200) |
| | | .attr("fill", color) |
| | | |
| | | // highlight links |
| | | linkNodes |
| | | .transition() |
| | | .duration(200) |
| | | .attr("stroke", "var(--g-link-active)") |
| | | |
| | | // show text for self |
| | | d3.select(this.parentNode) |
| | | .select("text") |
| | | .raise() |
| | | .transition() |
| | | .duration(200) |
| | | .style("opacity", 1) |
| | | }).on("mouseleave", function (_,d) { |
| | | d3.selectAll(".node") |
| | | .transition() |
| | | .duration(200) |
| | | .attr("fill", color) |
| | | |
| | | const currentId = d.id |
| | | const linkNodes = d3.selectAll(".link").filter(d => d.source.id === currentId || d.target.id === currentId) |
| | | |
| | | linkNodes |
| | | .transition() |
| | | .duration(200) |
| | | .attr("stroke", "var(--g-link)") |
| | | |
| | | d3.select(this.parentNode) |
| | | .select("text") |
| | | .transition() |
| | | .duration(200) |
| | | .style("opacity", 0) |
| | | }) |
| | | .call(drag(simulation)); |
| | | |
| | | // draw labels |
| | | const labels = graphNode.append("text") |
| | | .attr("dx", 12) |
| | | .attr("dy", ".35em") |
| | | .text((d) => content[decodeURI(d.id).replace(/\s+/g, '-')]?.title || "Untitled") |
| | | .style("opacity", 0) |
| | | .style("pointer-events", "none") |
| | | .call(drag(simulation)); |
| | | |
| | | // set panning |
| | | const enableZoom = {{$.Site.Data.graphConfig.enableZoom}} |
| | | if (enableZoom) { |
| | | svg.call(d3.zoom() |
| | | .extent([[0, 0], [width, height]]) |
| | | .scaleExtent([0.25, 4]) |
| | | .on("zoom", ({transform}) => { |
| | | link.attr("transform", transform); |
| | | node.attr("transform", transform); |
| | | labels.attr("transform", transform); |
| | | })); |
| | | } |
| | | |
| | | // progress the simulation |
| | | simulation.on("tick", () => { |
| | | 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) |
| | | labels |
| | | .attr("x", d => d.x) |
| | | .attr("y", d => d.y) |
| | | }); |
| | | } |
| | | |
| | | run() |
| | | drawGraph( |
| | | {{strings.TrimRight "/" .Page.Permalink}}, |
| | | {{strings.TrimRight "/" .Site.BaseURL}}, |
| | | {{$.Site.Data.graphConfig.paths}}, |
| | | {{$.Site.Data.graphConfig.depth}}, |
| | | {{$.Site.Data.graphConfig.enableDrag}}, |
| | | {{$.Site.Data.graphConfig.enableLegend}}, |
| | | {{$.Site.Data.graphConfig.enableZoom}} |
| | | ) |
| | | </script> |