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

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hugo
Jacky Zhao 3 years ago committed by GitHub
parent 0293c12217 e0fd9570d7
commit 232bd2f016
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 96 additions and 127 deletions
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203
assets/js/graph.js
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@ -1,12 +1,5 @@
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
@ -23,22 +16,19 @@ async function drawGraph(
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 {
@ -47,14 +37,12 @@ async function drawGraph(
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) {
@ -65,7 +53,7 @@ async function drawGraph(
}
}
return 'var(--g-node)'
return "var(--g-node)"
}
const drag = (simulation) => {
@ -89,9 +77,9 @@ async function drawGraph(
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)
@ -99,67 +87,58 @@ async function drawGraph(
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) => {
@ -170,82 +149,68 @@ async function drawGraph(
// 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))
@ -260,24 +225,24 @@ async function drawGraph(
[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)
})
}

14
assets/js/router.js
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@ -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) => {
// SPA navigation for access later
window.navigate = navigate
// We only mutate document.title and content within .singlePage element
// Attach SPA functions to the global Million namespace
window.Million = {
router,
navigate,
reload,
prefetch,
};
router(".singlePage")
// We need on initial load, then subsequent redirs
// requestAnimationFrame() delays graph draw until SPA routing is finished
window.addEventListener("million:navigate", () => requestAnimationFrame(draw))
reload(draw)
window.addEventListener("DOMContentLoaded", () => requestAnimationFrame(draw))
}

2
assets/js/search.js
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@ -153,7 +153,7 @@ const highlight = (content, term) => {
const redir = (id, term) => {
// SPA navigation
window.navigate(
window.Million.navigate(
new URL(
`${BASE_URL.replace(/\/$/g, "")}${id}#:~:text=${encodeURIComponent(term)}/`
),

2
layouts/partials/head.html
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@ -107,7 +107,7 @@
</script>
{{else}}
<script>
window.navigate = (url) => window.location.href = url;
window.Million.navigate = (url) => window.location.href = url;
draw();
</script>
{{end}}

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