local and global graph

quartz/components/scripts/graph.inline.ts

@@ -0,0 +1,287 @@
+import { ContentDetails } from "../../plugins/emitters/contentIndex"
+import * as d3 from 'd3'
+
+type NodeData = {
+  id: string,
+  text: string,
+  tags: string[]
+} & d3.SimulationNodeDatum
+
+type LinkData = {
+  source: string,
+  target: string
+}
+
+function relative(from: string, to: string) {
+  const pieces = [location.protocol, '//', location.host, location.pathname]
+  const url = pieces.join('').slice(0, -from.length) + to
+  return url
+}
+
+function removeAllChildren(node: HTMLElement) {
+  while (node.firstChild) {
+    node.removeChild(node.firstChild)
+  }
+}
+
+async function renderGraph(container: string, slug: string) {
+  const graph = document.getElementById(container)!
+  removeAllChildren(graph)
+
+  let {
+    drag: enableDrag,
+    zoom: enableZoom,
+    depth,
+    scale,
+    repelForce,
+    centerForce,
+    linkDistance,
+    fontSize,
+    opacityScale
+  } = JSON.parse(graph.dataset["cfg"]!)
+
+  const data = await fetchData
+
+  const links: LinkData[] = []
+  for (const [src, details] of Object.entries<ContentDetails>(data)) {
+    const outgoing = details.links ?? []
+    for (const dest of outgoing) {
+      if (src in data && dest in data) {
+        links.push({ source: src, target: dest })
+      }
+    }
+  }
+
+  const neighbourhood = new Set()
+
+  const wl = [slug, "__SENTINEL"]
+  if (depth >= 0) {
+    while (depth >= 0 && wl.length > 0) {
+      // compute neighbours
+      const cur = wl.shift()
+      if (cur === "__SENTINEL") {
+        depth--
+        wl.push("__SENTINEL")
+      } else {
+        neighbourhood.add(cur)
+        const outgoing = links.filter(l => l.source === cur)
+        const incoming = links.filter(l => l.target === cur)
+        wl.push(...outgoing.map((l) => l.target), ...incoming.map((l) => l.source))
+      }
+    }
+  } else {
+    links.flatMap(l => [l.source, l.target]).forEach((id) => neighbourhood.add(id))
+  }
+
+  const graphData: { nodes: NodeData[], links: LinkData[] } = {
+    nodes: Object.keys(data).filter(id => neighbourhood.has(id)).map(url => ({ id: url, text: data[url]?.title ?? url, tags: data[url]?.tags ?? [] })),
+    links: links.filter((l) => neighbourhood.has(l.source) && neighbourhood.has(l.target))
+  }
+
+  const simulation: d3.Simulation<NodeData, LinkData> = d3
+    .forceSimulation(graphData.nodes)
+    .force("charge", d3.forceManyBody().strength(-100 * repelForce))
+    .force(
+      "link",
+      d3
+        .forceLink(graphData.links)
+        .id((d: any) => d.id)
+        .distance(linkDistance),
+    )
+    .force("center", d3.forceCenter().strength(centerForce))
+
+  const height = Math.max(graph.offsetHeight, 250)
+  const width = graph.offsetWidth
+
+  const svg = d3
+    .select<HTMLElement, NodeData>('#' + container)
+    .append("svg")
+    .attr("width", width)
+    .attr("height", height)
+    .attr('viewBox', [-width / 2 / scale, -height / 2 / scale, width / scale, height / scale])
+
+  // draw links between nodes
+  const link = svg
+    .append("g")
+    .selectAll("line")
+    .data(graphData.links)
+    .join("line")
+    .attr("class", "link")
+    .attr("stroke", "var(--lightgray)")
+    .attr("stroke-width", 2)
+
+  // svg groups
+  const graphNode = svg.append("g").selectAll("g").data(graphData.nodes).enter().append("g")
+
+  // calculate radius
+  const color = (d: NodeData) => {
+    // TODO: does this handle the index page
+    const isCurrent = d.id === slug
+    return isCurrent ? "var(--secondary)" : "var(--gray)"
+  }
+
+  const drag = (simulation: d3.Simulation<NodeData, LinkData>) => {
+    function dragstarted(event: any, d: NodeData) {
+      if (!event.active) simulation.alphaTarget(1).restart()
+      d.fx = d.x
+      d.fy = d.y
+    }
+
+    function dragged(event: any, d: NodeData) {
+      d.fx = event.x
+      d.fy = event.y
+    }
+
+    function dragended(event: any, d: NodeData) {
+      if (!event.active) simulation.alphaTarget(0)
+      d.fx = null
+      d.fy = null
+    }
+
+    const noop = () => { }
+    return d3
+      .drag<Element, NodeData>()
+      .on("start", enableDrag ? dragstarted : noop)
+      .on("drag", enableDrag ? dragged : noop)
+      .on("end", enableDrag ? dragended : noop)
+  }
+
+  function nodeRadius(d: NodeData) {
+    const numLinks = links.filter((l: any) => l.source.id === d.id || l.target.id === d.id).length
+    return 2 + Math.sqrt(numLinks)
+  }
+
+  // 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) => {
+      const targ = relative(slug, d.id)
+      window.spaNavigate(new URL(targ))
+    })
+    .on("mouseover", function(_, d) {
+      const neighbours: string[] = data[slug].links ?? []
+      const neighbourNodes = d3.selectAll<HTMLElement, NodeData>(".node").filter((d) => neighbours.includes(d.id))
+      const currentId = d.id
+      const linkNodes = d3
+        .selectAll(".link")
+        .filter((d: any) => 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(--gray)")
+
+      const bigFont = fontSize * 1.5
+
+      // show text for self
+      const parent = this.parentNode as HTMLElement
+      d3.select<HTMLElement, NodeData>(parent)
+        .raise()
+        .select("text")
+        .transition()
+        .duration(200)
+        .attr('opacityOld', d3.select(parent).select('text').style("opacity"))
+        .style('opacity', 1)
+        .style('font-size', bigFont + 'em')
+    })
+    .on("mouseleave", function(_, d) {
+      const currentId = d.id
+      const linkNodes = d3
+        .selectAll(".link")
+        .filter((d: any) => d.source.id === currentId || d.target.id === currentId)
+
+      linkNodes.transition().duration(200).attr("stroke", "var(--lightgray)")
+
+      const parent = this.parentNode as HTMLElement
+      d3.select<HTMLElement, NodeData>(parent)
+        .select("text")
+        .transition()
+        .duration(200)
+        .style('opacity', d3.select(parent).select('text').attr("opacityOld"))
+        .style('font-size', fontSize + 'em')
+    })
+    // @ts-ignore
+    .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) => data[d.id]?.title || (d.id.charAt(1).toUpperCase() + d.id.slice(2)).replace("-", " "))
+    .style('opacity', (opacityScale - 1) / 3.75)
+    .style("pointer-events", "none")
+    .style('font-size', fontSize + 'em')
+    .raise()
+    // @ts-ignore
+    .call(drag(simulation))
+
+  // set panning
+  if (enableZoom) {
+    svg.call(
+      d3
+        .zoom<SVGSVGElement, NodeData>()
+        .extent([
+          [0, 0],
+          [width, height],
+        ])
+        .scaleExtent([0.25, 4])
+        .on("zoom", ({ transform }) => {
+          link.attr("transform", transform)
+          node.attr("transform", transform)
+          const scale = transform.k * opacityScale;
+          const scaledOpacity = Math.max((scale - 1) / 3.75, 0)
+          labels.attr("transform", transform).style("opacity", scaledOpacity)
+        }),
+    )
+  }
+
+  // progress the simulation
+  simulation.on("tick", () => {
+    link
+      .attr("x1", (d: any) => d.source.x)
+      .attr("y1", (d: any) => d.source.y)
+      .attr("x2", (d: any) => d.target.x)
+      .attr("y2", (d: any) => d.target.y)
+    node
+      .attr("cx", (d: any) => d.x)
+      .attr("cy", (d: any) => d.y)
+    labels
+      .attr("x", (d: any) => d.x)
+      .attr("y", (d: any) => d.y)
+  })
+}
+
+function renderGlobalGraph() {
+  const slug = document.body.dataset["slug"]!
+  renderGraph("global-graph-container", slug)
+  const container = document.getElementById("global-graph-outer")
+  container?.classList.add("active")
+
+  function hideGlobalGraph(this: HTMLElement, e: HTMLElementEventMap["click"]) {
+    if (e.target !== this) return
+
+    container?.classList.remove("active")
+    const graph = document.getElementById("global-graph-container")!
+    removeAllChildren(graph)
+  }
+
+  container?.removeEventListener("click", hideGlobalGraph)
+  container?.addEventListener("click", hideGlobalGraph)
+}
+
+document.addEventListener("nav", async (e: unknown) => {
+  const slug = (e as CustomEventMap["nav"]).detail.url
+  await renderGraph("graph-container", slug)
+
+  const containerIcon = document.getElementById("global-graph-icon")
+  containerIcon?.removeEventListener("click", renderGlobalGraph)
+  containerIcon?.addEventListener("click", renderGlobalGraph)
+})

quartz/components/scripts/popover.inline.ts

@@ -1,39 +1,50 @@
-import { computePosition, inline, shift, autoPlacement } from "@floating-ui/dom"
+import { computePosition, flip, inline, shift } from "@floating-ui/dom"
 
 document.addEventListener("nav", () => {
   const links = [...document.getElementsByClassName("internal")] as HTMLLinkElement[]
   const p = new DOMParser()
   for (const link of links) {
     link.addEventListener("mouseenter", async ({ clientX, clientY }) => {
-      if (link.dataset.fetchedPopover === "true") return
+      async function setPosition(popoverElement: HTMLElement) {
+        const { x, y } = await computePosition(link, popoverElement, {
+          middleware: [inline({
+            x: clientX,
+            y: clientY
+          }), shift(), flip()]
+        })
+        Object.assign(popoverElement.style, {
+          left: `${x}px`,
+          top: `${y}px`,
+        })
+      }
+
+      if (link.dataset.fetchedPopover === "true") {
+        return setPosition(link.lastChild as HTMLElement)
+      }
+
       const url = link.href
+      const anchor = new URL(url).hash
+      if (anchor.startsWith("#")) return
+
       const contents = await fetch(`${url}`)
         .then((res) => res.text())
         .catch((err) => {
           console.error(err)
         })
+
       if (!contents) return
       const html = p.parseFromString(contents, "text/html")
       const elts = [...html.getElementsByClassName("popover-hint")]
       if (elts.length === 0) return
 
-
       const popoverElement = document.createElement("div")
       popoverElement.classList.add("popover")
-      elts.forEach(elt => popoverElement.appendChild(elt))
-
-      const { x, y } = await computePosition(link, popoverElement, {
-        middleware: [inline({
-          x: clientX,
-          y: clientY
-        }), shift(), autoPlacement()]
-      })
-
-      Object.assign(popoverElement.style, {
-        left: `${x}px`,
-        top: `${y}px`,
-      })
+      const popoverInner = document.createElement("div")
+      popoverInner.classList.add("popover-inner")
+      popoverElement.appendChild(popoverInner)
+      elts.forEach(elt => popoverInner.appendChild(elt))
 
+      setPosition(popoverElement)
       link.appendChild(popoverElement)
       link.dataset.fetchedPopover = "true"
     })

quartz/components/scripts/spa.inline.ts

@@ -29,8 +29,8 @@ const getOpts = ({ target }: Event): { url: URL, scroll?: boolean } | undefined
   return { url: new URL(href), scroll: 'routerNoscroll' in a.dataset ? false : undefined }
 }
 
-function notifyNav(slug: string) {
-  const event = new CustomEvent("nav", { detail: { slug } })
+function notifyNav(url: string) {
+  const event: CustomEventMap["nav"] = new CustomEvent("nav", { detail: { url } })
   document.dispatchEvent(event)
 }
 
@@ -73,6 +73,8 @@ async function navigate(url: URL, isBack: boolean = false) {
   delete announcer.dataset.persist
 }
 
+window.spaNavigate = navigate
+
 function createRouter() {
   if (typeof window !== "undefined") {
     window.addEventListener("click", async (event) => {