{"version":3,"file":"toc_controller-BSnUFVKq.js","names":[],"sources":["../../../app/javascript/entrypoints/site_controllers/toc_controller.js"],"sourcesContent":["import { Controller } from \"@hotwired/stimulus\"\n\n// Builds the article table of contents from the headings of the rich-text body,\n// gives each heading an id, and highlights the section being read.\nexport default class extends Controller {\n  static targets = [\"content\", \"list\", \"box\"]\n\n  connect() {\n    const headings = [...this.contentTarget.querySelectorAll(\"h1, h2, h3\")]\n    if (headings.length < 2) return\n\n    const used = new Set()\n    this.links = headings.map((heading) => {\n      heading.id ||= this.uniqueId(heading.textContent, used)\n      const link = document.createElement(\"a\")\n      link.href = `#${heading.id}`\n      link.textContent = heading.textContent.trim()\n      if (heading.tagName === \"H3\") link.classList.add(\"sub\")\n      this.listTarget.appendChild(link)\n      return link\n    })\n    this.boxTarget.hidden = false\n    this.observe(headings)\n  }\n\n  disconnect() {\n    this.observer?.disconnect()\n  }\n\n  observe(headings) {\n    if (!(\"IntersectionObserver\" in window)) return\n    this.observer = new IntersectionObserver((entries) => {\n      entries.forEach((entry) => {\n        if (!entry.isIntersecting) return\n        this.links.forEach((link) => link.toggleAttribute(\"aria-current\", link.hash === `#${entry.target.id}`))\n      })\n    }, { rootMargin: \"-20% 0px -70% 0px\" })\n    headings.forEach((heading) => this.observer.observe(heading))\n  }\n\n  uniqueId(text, used) {\n    const base = text.toLowerCase().normalize(\"NFD\").replace(/[̀-ͯ]/g, \"\")\n      .replace(/[^a-z0-9]+/g, \"-\").replace(/^-|-$/g, \"\") || \"section\"\n    let id = base\n    let index = 2\n    while (used.has(id) || document.getElementById(id)) id = `${base}-${index++}`\n    used.add(id)\n    return id\n  }\n}\n"],"mappings":"4GAIA,EAAA,cAA6B,CAAW,CACtC,OAAO,QAAU,CAAC,UAAW,OAAQ,MAAM,CAE3C,SAAU,CACR,IAAM,EAAW,CAAC,GAAG,KAAK,cAAc,iBAAiB,aAAa,CAAC,CACvE,GAAI,EAAS,OAAS,EAAG,OAEzB,IAAM,EAAO,IAAI,IACjB,KAAK,MAAQ,EAAS,IAAK,GAAY,CACrC,EAAQ,KAAO,KAAK,SAAS,EAAQ,YAAa,EAAK,CACvD,IAAM,EAAO,SAAS,cAAc,IAAI,CAKxC,MAJA,GAAK,KAAO,IAAI,EAAQ,KACxB,EAAK,YAAc,EAAQ,YAAY,MAAM,CACzC,EAAQ,UAAY,MAAM,EAAK,UAAU,IAAI,MAAM,CACvD,KAAK,WAAW,YAAY,EAAK,CAC1B,GACP,CACF,KAAK,UAAU,OAAS,GACxB,KAAK,QAAQ,EAAS,CAGxB,YAAa,CACX,KAAK,UAAU,YAAY,CAG7B,QAAQ,EAAU,CACV,yBAA0B,SAChC,KAAK,SAAW,IAAI,qBAAsB,GAAY,CACpD,EAAQ,QAAS,GAAU,CACpB,EAAM,gBACX,KAAK,MAAM,QAAS,GAAS,EAAK,gBAAgB,eAAgB,EAAK,OAAS,IAAI,EAAM,OAAO,KAAK,CAAC,EACvG,EACD,CAAE,WAAY,oBAAqB,CAAC,CACvC,EAAS,QAAS,GAAY,KAAK,SAAS,QAAQ,EAAQ,CAAC,EAG/D,SAAS,EAAM,EAAM,CACnB,IAAM,EAAO,EAAK,aAAa,CAAC,UAAU,MAAM,CAAC,QAAQ,SAAU,GAAG,CACnE,QAAQ,cAAe,IAAI,CAAC,QAAQ,SAAU,GAAG,EAAI,UACpD,EAAK,EACL,EAAQ,EACZ,KAAO,EAAK,IAAI,EAAG,EAAI,SAAS,eAAe,EAAG,EAAE,EAAK,GAAG,EAAK,GAAG,MAEpE,OADA,EAAK,IAAI,EAAG,CACL"}