| | |
| | | async function drawGraph( |
| | | baseUrl, |
| | | pathColors, |
| | | depth, |
| | | enableDrag, |
| | | enableLegend, |
| | | enableZoom |
| | | ) { |
| | | const container = document.getElementById('graph-container') |
| | | async function drawGraph(baseUrl, pathColors, depth, enableDrag, enableLegend, enableZoom) { |
| | | const container = document.getElementById("graph-container") |
| | | const { index, links, content } = await fetchData |
| | | |
| | | // Use .pathname to remove hashes / searchParams / text fragments |
| | |
| | | const copyLinks = JSON.parse(JSON.stringify(links)) |
| | | |
| | | const neighbours = new Set() |
| | | const wl = [curPage || '/', '__SENTINEL'] |
| | | const wl = [curPage || "/", "__SENTINEL"] |
| | | if (depth >= 0) { |
| | | while (depth >= 0 && wl.length > 0) { |
| | | // compute neighbours |
| | | const cur = wl.shift() |
| | | if (cur === '__SENTINEL') { |
| | | if (cur === "__SENTINEL") { |
| | | depth-- |
| | | wl.push('__SENTINEL') |
| | | 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) |
| | | ) |
| | | wl.push(...outgoing.map((l) => l.target), ...incoming.map((l) => l.source)) |
| | | } |
| | | } |
| | | } else { |
| | |
| | | |
| | | const data = { |
| | | nodes: [...neighbours].map((id) => ({ id })), |
| | | links: copyLinks.filter( |
| | | (l) => neighbours.has(l.source) && neighbours.has(l.target) |
| | | ), |
| | | links: copyLinks.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)' |
| | | if (d.id === curPage || (d.id === "/" && curPage === "")) { |
| | | return "var(--g-node-active)" |
| | | } |
| | | |
| | | for (const pathColor of pathColors) { |
| | |
| | | } |
| | | } |
| | | |
| | | return 'var(--g-node)' |
| | | return "var(--g-node)" |
| | | } |
| | | |
| | | const drag = (simulation) => { |
| | |
| | | const noop = () => { } |
| | | return d3 |
| | | .drag() |
| | | .on('start', enableDrag ? dragstarted : noop) |
| | | .on('drag', enableDrag ? dragged : noop) |
| | | .on('end', enableDrag ? dragended : noop) |
| | | .on("start", enableDrag ? dragstarted : noop) |
| | | .on("drag", enableDrag ? dragged : noop) |
| | | .on("end", enableDrag ? dragended : noop) |
| | | } |
| | | |
| | | const height = Math.max(container.offsetHeight, 250) |
| | |
| | | |
| | | const simulation = d3 |
| | | .forceSimulation(data.nodes) |
| | | .force('charge', d3.forceManyBody().strength(-30)) |
| | | .force("charge", d3.forceManyBody().strength(-30)) |
| | | .force( |
| | | 'link', |
| | | "link", |
| | | d3 |
| | | .forceLink(data.links) |
| | | .id((d) => d.id) |
| | | .distance(40) |
| | | .distance(40), |
| | | ) |
| | | .force('center', d3.forceCenter()) |
| | | .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]) |
| | | .select("#graph-container") |
| | | .append("svg") |
| | | .attr("width", width) |
| | | .attr("height", height) |
| | | .attr("viewBox", [-width / 2, -height / 2, width, height]) |
| | | |
| | | if (enableLegend) { |
| | | const legend = [ |
| | | { Current: 'var(--g-node-active)' }, |
| | | { Note: 'var(--g-node)' }, |
| | | ...pathColors, |
| | | ] |
| | | 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) |
| | | .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)) |
| | | .append("text") |
| | | .attr("x", -width / 2 + 40) |
| | | .attr("y", height / 2 - 30 * (i + 1)) |
| | | .text(key) |
| | | .style('font-size', '15px') |
| | | .attr('alignment-baseline', 'middle') |
| | | .style("font-size", "15px") |
| | | .attr("alignment-baseline", "middle") |
| | | }) |
| | | } |
| | | |
| | | // draw links between nodes |
| | | const link = svg |
| | | .append('g') |
| | | .selectAll('line') |
| | | .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) |
| | | .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') |
| | | const graphNode = svg.append("g").selectAll("g").data(data.nodes).enter().append("g") |
| | | |
| | | // calculate radius |
| | | const nodeRadius = (d) => { |
| | |
| | | |
| | | // draw individual nodes |
| | | const node = graphNode |
| | | .append('circle') |
| | | .attr('class', 'node') |
| | | .attr('id', (d) => d.id) |
| | | .attr('r', nodeRadius) |
| | | .attr('fill', color) |
| | | .style('cursor', 'pointer') |
| | | .on('click', (_, d) => { |
| | | .append("circle") |
| | | .attr("class", "node") |
| | | .attr("id", (d) => d.id) |
| | | .attr("r", nodeRadius) |
| | | .attr("fill", color) |
| | | .style("cursor", "pointer") |
| | | .on("click", (_, d) => { |
| | | // SPA navigation |
| | | window.navigate( |
| | | new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, '-')}/`), |
| | | '.singlePage' |
| | | ) |
| | | window.Million.navigate(new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, "-")}/`), ".singlePage") |
| | | }) |
| | | .on('mouseover', function(_, d) { |
| | | d3.selectAll('.node') |
| | | .transition() |
| | | .duration(100) |
| | | .attr('fill', 'var(--g-node-inactive)') |
| | | .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 neighbourNodes = d3.selectAll(".node").filter((d) => neighbours.includes(d.id)) |
| | | const currentId = d.id |
| | | window.Million.prefetch(new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, "-")}/`)) |
| | | const linkNodes = d3 |
| | | .selectAll('.link') |
| | | .selectAll(".link") |
| | | .filter((d) => d.source.id === currentId || d.target.id === currentId) |
| | | |
| | | // highlight neighbour nodes |
| | | neighbourNodes.transition().duration(200).attr('fill', color) |
| | | neighbourNodes.transition().duration(200).attr("fill", color) |
| | | |
| | | // highlight links |
| | | linkNodes |
| | | .transition() |
| | | .duration(200) |
| | | .attr('stroke', 'var(--g-link-active)') |
| | | linkNodes.transition().duration(200).attr("stroke", "var(--g-link-active)") |
| | | |
| | | // show text for self |
| | | d3.select(this.parentNode) |
| | | .raise() |
| | | .select('text') |
| | | .select("text") |
| | | .transition() |
| | | .duration(200) |
| | | .style('opacity', 1) |
| | | .style("opacity", 1) |
| | | }) |
| | | .on('mouseleave', function(_, d) { |
| | | d3.selectAll('.node').transition().duration(200).attr('fill', color) |
| | | .on("mouseleave", function (_, d) { |
| | | d3.selectAll(".node").transition().duration(200).attr("fill", color) |
| | | |
| | | const currentId = d.id |
| | | const linkNodes = d3 |
| | | .selectAll('.link') |
| | | .selectAll(".link") |
| | | .filter((d) => d.source.id === currentId || d.target.id === currentId) |
| | | |
| | | linkNodes.transition().duration(200).attr('stroke', 'var(--g-link)') |
| | | linkNodes.transition().duration(200).attr("stroke", "var(--g-link)") |
| | | |
| | | d3.select(this.parentNode) |
| | | .select('text') |
| | | .transition() |
| | | .duration(200) |
| | | .style('opacity', 0) |
| | | d3.select(this.parentNode).select("text").transition().duration(200).style("opacity", 0) |
| | | }) |
| | | .call(drag(simulation)) |
| | | |
| | | // draw labels |
| | | const labels = graphNode |
| | | .append('text') |
| | | .attr('dx', 0) |
| | | .attr('dy', (d) => nodeRadius(d) + 8 + 'px') |
| | | .attr('text-anchor', 'middle') |
| | | .text((d) => content[d.id]?.title || d.id.replace('-', ' ')) |
| | | .style('opacity', 0) |
| | | .style('pointer-events', 'none') |
| | | .style('font-size', '0.4em') |
| | | .append("text") |
| | | .attr("dx", 0) |
| | | .attr("dy", (d) => nodeRadius(d) + 8 + "px") |
| | | .attr("text-anchor", "middle") |
| | | .text((d) => content[d.id]?.title || d.id.replace("-", " ")) |
| | | .style("opacity", 0) |
| | | .style("pointer-events", "none") |
| | | .style("font-size", "0.4em") |
| | | .raise() |
| | | .call(drag(simulation)) |
| | | |
| | |
| | | [width, height], |
| | | ]) |
| | | .scaleExtent([0.25, 4]) |
| | | .on('zoom', ({ transform }) => { |
| | | link.attr('transform', transform) |
| | | node.attr('transform', transform) |
| | | .on("zoom", ({ transform }) => { |
| | | link.attr("transform", transform) |
| | | node.attr("transform", transform) |
| | | const scale = transform.k |
| | | const scaledOpacity = Math.max((scale - 1) / 3.75, 0) |
| | | labels.attr('transform', transform).style('opacity', scaledOpacity) |
| | | }) |
| | | labels.attr("transform", transform).style("opacity", scaledOpacity) |
| | | }), |
| | | ) |
| | | } |
| | | |
| | | // progress the simulation |
| | | simulation.on('tick', () => { |
| | | 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) |
| | | .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) |
| | | }) |
| | | } |