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Merge pull request #134 from aidenybai/add-prefetching-within-graph

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This commit is contained in:
Jacky Zhao 2022-05-27 11:01:20 -07:00 committed by GitHub
commit a5942130db
4 changed files with 96 additions and 127 deletions
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205
assets/js/graph.js
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@ -1,12 +1,5 @@
async function drawGraph( async function drawGraph(baseUrl, pathColors, depth, enableDrag, enableLegend, enableZoom) {
baseUrl, const container = document.getElementById("graph-container")
pathColors,
depth,
enableDrag,
enableLegend,
enableZoom
) {
const container = document.getElementById('graph-container')
const { index, links, content } = await fetchData const { index, links, content } = await fetchData
// Use .pathname to remove hashes / searchParams / text fragments // Use .pathname to remove hashes / searchParams / text fragments
@ -23,22 +16,19 @@ async function drawGraph(
const copyLinks = JSON.parse(JSON.stringify(links)) const copyLinks = JSON.parse(JSON.stringify(links))
const neighbours = new Set() const neighbours = new Set()
const wl = [curPage || '/', '__SENTINEL'] const wl = [curPage || "/", "__SENTINEL"]
if (depth >= 0) { if (depth >= 0) {
while (depth >= 0 && wl.length > 0) { while (depth >= 0 && wl.length > 0) {
// compute neighbours // compute neighbours
const cur = wl.shift() const cur = wl.shift()
if (cur === '__SENTINEL') { if (cur === "__SENTINEL") {
depth-- depth--
wl.push('__SENTINEL') wl.push("__SENTINEL")
} else { } else {
neighbours.add(cur) neighbours.add(cur)
const outgoing = index.links[cur] || [] const outgoing = index.links[cur] || []
const incoming = index.backlinks[cur] || [] const incoming = index.backlinks[cur] || []
wl.push( wl.push(...outgoing.map((l) => l.target), ...incoming.map((l) => l.source))
...outgoing.map((l) => l.target),
...incoming.map((l) => l.source)
)
} }
} }
} else { } else {
@ -47,14 +37,12 @@ async function drawGraph(
const data = { const data = {
nodes: [...neighbours].map((id) => ({ id })), nodes: [...neighbours].map((id) => ({ id })),
links: copyLinks.filter( links: copyLinks.filter((l) => neighbours.has(l.source) && neighbours.has(l.target)),
(l) => neighbours.has(l.source) && neighbours.has(l.target)
),
} }
const color = (d) => { const color = (d) => {
if (d.id === curPage || (d.id === '/' && curPage === '')) { if (d.id === curPage || (d.id === "/" && curPage === "")) {
return 'var(--g-node-active)' return "var(--g-node-active)"
} }
for (const pathColor of pathColors) { for (const pathColor of pathColors) {
@ -65,7 +53,7 @@ async function drawGraph(
} }
} }
return 'var(--g-node)' return "var(--g-node)"
} }
const drag = (simulation) => { const drag = (simulation) => {
@ -86,12 +74,12 @@ async function drawGraph(
d.fy = null d.fy = null
} }
const noop = () => { } const noop = () => {}
return d3 return d3
.drag() .drag()
.on('start', enableDrag ? dragstarted : noop) .on("start", enableDrag ? dragstarted : noop)
.on('drag', enableDrag ? dragged : noop) .on("drag", enableDrag ? dragged : noop)
.on('end', enableDrag ? dragended : noop) .on("end", enableDrag ? dragended : noop)
} }
const height = Math.max(container.offsetHeight, 250) const height = Math.max(container.offsetHeight, 250)
@ -99,67 +87,58 @@ async function drawGraph(
const simulation = d3 const simulation = d3
.forceSimulation(data.nodes) .forceSimulation(data.nodes)
.force('charge', d3.forceManyBody().strength(-30)) .force("charge", d3.forceManyBody().strength(-30))
.force( .force(
'link', "link",
d3 d3
.forceLink(data.links) .forceLink(data.links)
.id((d) => d.id) .id((d) => d.id)
.distance(40) .distance(40),
) )
.force('center', d3.forceCenter()) .force("center", d3.forceCenter())
const svg = d3 const svg = d3
.select('#graph-container') .select("#graph-container")
.append('svg') .append("svg")
.attr('width', width) .attr("width", width)
.attr('height', height) .attr("height", height)
.attr('viewBox', [-width / 2, -height / 2, width, height]) .attr("viewBox", [-width / 2, -height / 2, width, height])
if (enableLegend) { if (enableLegend) {
const legend = [ const legend = [{ Current: "var(--g-node-active)" }, { Note: "var(--g-node)" }, ...pathColors]
{ Current: 'var(--g-node-active)' },
{ Note: 'var(--g-node)' },
...pathColors,
]
legend.forEach((legendEntry, i) => { legend.forEach((legendEntry, i) => {
const key = Object.keys(legendEntry)[0] const key = Object.keys(legendEntry)[0]
const colour = legendEntry[key] const colour = legendEntry[key]
svg svg
.append('circle') .append("circle")
.attr('cx', -width / 2 + 20) .attr("cx", -width / 2 + 20)
.attr('cy', height / 2 - 30 * (i + 1)) .attr("cy", height / 2 - 30 * (i + 1))
.attr('r', 6) .attr("r", 6)
.style('fill', colour) .style("fill", colour)
svg svg
.append('text') .append("text")
.attr('x', -width / 2 + 40) .attr("x", -width / 2 + 40)
.attr('y', height / 2 - 30 * (i + 1)) .attr("y", height / 2 - 30 * (i + 1))
.text(key) .text(key)
.style('font-size', '15px') .style("font-size", "15px")
.attr('alignment-baseline', 'middle') .attr("alignment-baseline", "middle")
}) })
} }
// draw links between nodes // draw links between nodes
const link = svg const link = svg
.append('g') .append("g")
.selectAll('line') .selectAll("line")
.data(data.links) .data(data.links)
.join('line') .join("line")
.attr('class', 'link') .attr("class", "link")
.attr('stroke', 'var(--g-link)') .attr("stroke", "var(--g-link)")
.attr('stroke-width', 2) .attr("stroke-width", 2)
.attr('data-source', (d) => d.source.id) .attr("data-source", (d) => d.source.id)
.attr('data-target', (d) => d.target.id) .attr("data-target", (d) => d.target.id)
// svg groups // svg groups
const graphNode = svg const graphNode = svg.append("g").selectAll("g").data(data.nodes).enter().append("g")
.append('g')
.selectAll('g')
.data(data.nodes)
.enter()
.append('g')
// calculate radius // calculate radius
const nodeRadius = (d) => { const nodeRadius = (d) => {
@ -170,82 +149,68 @@ async function drawGraph(
// draw individual nodes // draw individual nodes
const node = graphNode const node = graphNode
.append('circle') .append("circle")
.attr('class', 'node') .attr("class", "node")
.attr('id', (d) => d.id) .attr("id", (d) => d.id)
.attr('r', nodeRadius) .attr("r", nodeRadius)
.attr('fill', color) .attr("fill", color)
.style('cursor', 'pointer') .style("cursor", "pointer")
.on('click', (_, d) => { .on("click", (_, d) => {
// SPA navigation // SPA navigation
window.navigate( window.Million.navigate(new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, "-")}/`), ".singlePage")
new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, '-')}/`),
'.singlePage'
)
}) })
.on('mouseover', function(_, d) { .on("mouseover", function (_, d) {
d3.selectAll('.node') d3.selectAll(".node").transition().duration(100).attr("fill", "var(--g-node-inactive)")
.transition()
.duration(100)
.attr('fill', 'var(--g-node-inactive)')
const neighbours = parseIdsFromLinks([ const neighbours = parseIdsFromLinks([
...(index.links[d.id] || []), ...(index.links[d.id] || []),
...(index.backlinks[d.id] || []), ...(index.backlinks[d.id] || []),
]) ])
const neighbourNodes = d3 const neighbourNodes = d3.selectAll(".node").filter((d) => neighbours.includes(d.id))
.selectAll('.node')
.filter((d) => neighbours.includes(d.id))
const currentId = d.id const currentId = d.id
window.Million.prefetch(new URL(`${baseUrl}${decodeURI(d.id).replace(/\s+/g, "-")}/`))
const linkNodes = d3 const linkNodes = d3
.selectAll('.link') .selectAll(".link")
.filter((d) => d.source.id === currentId || d.target.id === currentId) .filter((d) => d.source.id === currentId || d.target.id === currentId)
// highlight neighbour nodes // highlight neighbour nodes
neighbourNodes.transition().duration(200).attr('fill', color) neighbourNodes.transition().duration(200).attr("fill", color)
// highlight links // highlight links
linkNodes linkNodes.transition().duration(200).attr("stroke", "var(--g-link-active)")
.transition()
.duration(200)
.attr('stroke', 'var(--g-link-active)')
// show text for self // show text for self
d3.select(this.parentNode) d3.select(this.parentNode)
.raise() .raise()
.select('text') .select("text")
.transition() .transition()
.duration(200) .duration(200)
.style('opacity', 1) .style("opacity", 1)
}) })
.on('mouseleave', function(_, d) { .on("mouseleave", function (_, d) {
d3.selectAll('.node').transition().duration(200).attr('fill', color) d3.selectAll(".node").transition().duration(200).attr("fill", color)
const currentId = d.id const currentId = d.id
const linkNodes = d3 const linkNodes = d3
.selectAll('.link') .selectAll(".link")
.filter((d) => d.source.id === currentId || d.target.id === currentId) .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) d3.select(this.parentNode).select("text").transition().duration(200).style("opacity", 0)
.select('text')
.transition()
.duration(200)
.style('opacity', 0)
}) })
.call(drag(simulation)) .call(drag(simulation))
// draw labels // draw labels
const labels = graphNode const labels = graphNode
.append('text') .append("text")
.attr('dx', 0) .attr("dx", 0)
.attr('dy', (d) => nodeRadius(d) + 8 + 'px') .attr("dy", (d) => nodeRadius(d) + 8 + "px")
.attr('text-anchor', 'middle') .attr("text-anchor", "middle")
.text((d) => content[d.id]?.title || d.id.replace('-', ' ')) .text((d) => content[d.id]?.title || d.id.replace("-", " "))
.style('opacity', 0) .style("opacity", 0)
.style('pointer-events', 'none') .style("pointer-events", "none")
.style('font-size', '0.4em') .style("font-size", "0.4em")
.raise() .raise()
.call(drag(simulation)) .call(drag(simulation))
@ -260,24 +225,24 @@ async function drawGraph(
[width, height], [width, height],
]) ])
.scaleExtent([0.25, 4]) .scaleExtent([0.25, 4])
.on('zoom', ({ transform }) => { .on("zoom", ({ transform }) => {
link.attr('transform', transform) link.attr("transform", transform)
node.attr('transform', transform) node.attr("transform", transform)
const scale = transform.k const scale = transform.k
const scaledOpacity = Math.max((scale - 1) / 3.75, 0) 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 // progress the simulation
simulation.on('tick', () => { simulation.on("tick", () => {
link link
.attr('x1', (d) => d.source.x) .attr("x1", (d) => d.source.x)
.attr('y1', (d) => d.source.y) .attr("y1", (d) => d.source.y)
.attr('x2', (d) => d.target.x) .attr("x2", (d) => d.target.x)
.attr('y2', (d) => d.target.y) .attr("y2", (d) => d.target.y)
node.attr('cx', (d) => d.x).attr('cy', (d) => d.y) node.attr("cx", (d) => d.x).attr("cy", (d) => d.y)
labels.attr('x', (d) => d.x).attr('y', (d) => d.y) labels.attr("x", (d) => d.x).attr("y", (d) => d.y)
}) })
} }

14
assets/js/router.js
View File

@ -1,12 +1,16 @@
import { router, navigate } from "https://unpkg.com/million@1.8.9-0/dist/router.mjs" import { router, navigate, reload, prefetch } from "https://unpkg.com/million@1.9.4/dist/router.mjs"
export const attachSPARouting = (draw) => { export const attachSPARouting = (draw) => {
// SPA navigation for access later // Attach SPA functions to the global Million namespace
window.navigate = navigate window.Million = {
// We only mutate document.title and content within .singlePage element router,
navigate,
reload,
prefetch,
};
router(".singlePage") router(".singlePage")
// We need on initial load, then subsequent redirs // We need on initial load, then subsequent redirs
// requestAnimationFrame() delays graph draw until SPA routing is finished // requestAnimationFrame() delays graph draw until SPA routing is finished
window.addEventListener("million:navigate", () => requestAnimationFrame(draw)) reload(draw)
window.addEventListener("DOMContentLoaded", () => requestAnimationFrame(draw)) window.addEventListener("DOMContentLoaded", () => requestAnimationFrame(draw))
} }

2
assets/js/search.js
View File

@ -153,7 +153,7 @@ const highlight = (content, term) => {
const redir = (id, term) => { const redir = (id, term) => {
// SPA navigation // SPA navigation
window.navigate( window.Million.navigate(
new URL( new URL(
`${BASE_URL.replace(/\/$/g, "")}${id}#:~:text=${encodeURIComponent(term)}/` `${BASE_URL.replace(/\/$/g, "")}${id}#:~:text=${encodeURIComponent(term)}/`
), ),

2
layouts/partials/head.html
View File

@ -107,7 +107,7 @@
</script> </script>
{{else}} {{else}}
<script> <script>
window.navigate = (url) => window.location.href = url; window.Million.navigate = (url) => window.location.href = url;
draw(); draw();
</script> </script>
{{end}} {{end}}