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\t// install a JSONP callback for chunk loading\n \tfunction webpackJsonpCallback(data) {\n \t\tvar chunkIds = data[0];\n \t\tvar moreModules = data[1];\n \t\tvar executeModules = data[2];\n\n \t\t// add \"moreModules\" to the modules object,\n \t\t// then flag all \"chunkIds\" as loaded and fire callback\n \t\tvar moduleId, chunkId, i = 0, resolves = [];\n \t\tfor(;i < chunkIds.length; i++) {\n \t\t\tchunkId = chunkIds[i];\n \t\t\tif(Object.prototype.hasOwnProperty.call(installedChunks, chunkId) && installedChunks[chunkId]) {\n \t\t\t\tresolves.push(installedChunks[chunkId][0]);\n \t\t\t}\n \t\t\tinstalledChunks[chunkId] = 0;\n \t\t}\n \t\tfor(moduleId in moreModules) {\n \t\t\tif(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {\n \t\t\t\tmodules[moduleId] = moreModules[moduleId];\n \t\t\t}\n \t\t}\n \t\tif(parentJsonpFunction) parentJsonpFunction(data);\n\n \t\twhile(resolves.length) {\n \t\t\tresolves.shift()();\n \t\t}\n\n \t\t// add entry modules from loaded chunk to deferred list\n \t\tdeferredModules.push.apply(deferredModules, executeModules || []);\n\n \t\t// run deferred modules when all chunks ready\n \t\treturn checkDeferredModules();\n \t};\n \tfunction checkDeferredModules() {\n \t\tvar result;\n \t\tfor(var i = 0; i < deferredModules.length; i++) {\n \t\t\tvar deferredModule = deferredModules[i];\n \t\t\tvar fulfilled = true;\n \t\t\tfor(var j = 1; j < deferredModule.length; j++) {\n \t\t\t\tvar depId = deferredModule[j];\n \t\t\t\tif(installedChunks[depId] !== 0) fulfilled = false;\n \t\t\t}\n \t\t\tif(fulfilled) {\n \t\t\t\tdeferredModules.splice(i--, 1);\n \t\t\t\tresult = __webpack_require__(__webpack_require__.s = deferredModule[0]);\n \t\t\t}\n \t\t}\n\n \t\treturn result;\n \t}\n\n \t// The module cache\n \tvar installedModules = {};\n\n \t// object to store loaded and loading chunks\n \t// undefined = chunk not loaded, null = chunk preloaded/prefetched\n \t// Promise = chunk loading, 0 = chunk loaded\n \tvar installedChunks = {\n \t\t0: 0\n \t};\n\n \tvar deferredModules = [];\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__webpack_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __webpack_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \tvar jsonpArray = window[\"webpackJsonp\"] = window[\"webpackJsonp\"] || [];\n \tvar oldJsonpFunction = jsonpArray.push.bind(jsonpArray);\n \tjsonpArray.push = webpackJsonpCallback;\n \tjsonpArray = jsonpArray.slice();\n \tfor(var i = 0; i < jsonpArray.length; i++) webpackJsonpCallback(jsonpArray[i]);\n \tvar parentJsonpFunction = oldJsonpFunction;\n\n\n \t// add entry module to deferred list\n \tdeferredModules.push([87,1]);\n \t// run deferred modules when ready\n \treturn checkDeferredModules();\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { BehaviorSubject } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location\n *\n * This function will return a `URL` object (and not `Location`) in order to\n * normalize typings across the application. Furthermore, locations need to be\n * tracked without setting them and `Location` is a singleton which represents\n * the current location.\n *\n * @return URL\n */\nexport function getLocation(): URL {\n  return new URL(location.href)\n}\n\n/**\n * Set location\n *\n * @param url - URL to change to\n */\nexport function setLocation(url: URL): void {\n  location.href = url.href\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Check whether a URL is an internal link or a file (except `.html`)\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isLocationInternal(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.host === ref.host\n      && /^(?:\\/[\\w-]+)*(?:\\/?|\\.html)$/i.test(url.pathname)\n}\n\n/**\n * Check whether a URL is an anchor link on the current page\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isLocationAnchor(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.pathname === ref.pathname\n      && url.hash.length > 0\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location\n *\n * @return Location subject\n */\nexport function watchLocation(): BehaviorSubject<URL> {\n  return new BehaviorSubject<URL>(getLocation())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location hash\n *\n * @return Location hash\n */\nexport function getLocationHash(): string {\n  return location.hash.substring(1)\n}\n\n/**\n * Set location hash\n *\n * Setting a new fragment identifier via `location.hash` will have no effect\n * if the value doesn't change. However, when a new fragment identifier is set,\n * we want the browser to target the respective element at all times, which is\n * why we use this dirty little trick.\n *\n * @param hash - Location hash\n */\nexport function setLocationHash(hash: string): void {\n  const el = document.createElement(\"a\")\n  el.href = hash\n  el.click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location hash\n *\n * @return Location hash observable\n */\nexport function watchLocationHash(): Observable<string> {\n  return fromEvent<HashChangeEvent>(window, \"hashchange\")\n    .pipe(\n      map(getLocationHash),\n      startWith(getLocationHash()),\n      filter(hash => hash.length > 0),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable } from \"rxjs\"\nimport { ajax } from \"rxjs/ajax\"\nimport {\n  catchError,\n  distinctUntilKeyChanged,\n  map,\n  share,\n  skip,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { setLocation } from \"../../location\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  location$: Observable<URL>           /* Location observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch document switch\n *\n * This function returns an observables that fetches a document if the provided\n * location observable emits a new value (i.e. URL). If the emitted URL points\n * to the same page, the request is effectively ignored (i.e. when only the\n * fragment identifier changes).\n *\n * Theoretically, we could use `responseType: \"document\"`, but since all MkDocs\n * links are relative, we need to make sure that the current location matches\n * the document we just loaded. Otherwise any relative links in the document\n * may use the old location.\n *\n * @param options - Options\n *\n * @return Document observable\n */\nexport function watchDocumentSwitch(\n  { location$ }: WatchOptions\n): Observable<Document> {\n  const dom = new DOMParser()\n  return location$\n    .pipe(\n      distinctUntilKeyChanged(\"pathname\"),\n      skip(1),\n\n      /* Fetch document */\n      switchMap(url => ajax({\n        url: url.href,\n        responseType: \"text\",\n        withCredentials: true\n      })\n        .pipe(\n          map(({ response }): Document => {\n            history.pushState({}, \"\", url.toString())                           // TODO: abstract into function\n            return dom.parseFromString(response, \"text/html\")\n          }),\n          catchError(() => {\n            setLocation(url)\n            return NEVER\n          })\n        )\n      ),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, fromEvent, merge } from \"rxjs\"\nimport { mapTo, shareReplay } from \"rxjs/operators\"\n\nimport { watchDocumentSwitch } from \"../switch\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  location$?: Observable<URL>          /* Location observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch document\n *\n * If the location observable is passed, instant loading will be enabled which\n * means that new values will be emitted every time the location changes.\n *\n * @return Document observable\n */\nexport function watchDocument(\n  { location$ }: WatchOptions = {}\n): Observable<Document> {\n  return merge(\n    fromEvent(document, \"DOMContentLoaded\")\n      .pipe(\n        mapTo(document)\n      ),\n    typeof location$ !== \"undefined\"\n      ? watchDocumentSwitch({ location$ })\n      : NEVER\n  )\n    .pipe(\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve an element matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element or nothing\n */\nexport function getElement<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T | undefined {\n  return node.querySelector<T>(selector) || undefined\n}\n\n/**\n * Retrieve an element matching a query selector or throw a reference error\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element\n */\nexport function getElementOrThrow<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T {\n  const el = getElement<T>(selector, node)\n  if (typeof el === \"undefined\")\n    throw new ReferenceError(\n      `Missing element: expected \"${selector}\" to be present`\n    )\n  return el\n}\n\n/**\n * Retrieve the currently active element\n *\n * @return Element or nothing\n */\nexport function getActiveElement(): HTMLElement | undefined {\n  return document.activeElement instanceof HTMLElement\n    ? document.activeElement\n    : undefined\n}\n\n/**\n * Retrieve all elements matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Elements\n */\nexport function getElements<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T[] {\n  return Array.from(node.querySelectorAll<T>(selector))\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { mapTo, shareReplay, startWith } from \"rxjs/operators\"\n\nimport { getActiveElement } from \"../_\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element focus\n *\n * @param el - Element\n * @param value - Whether the element should be focused\n */\nexport function setElementFocus(\nel: HTMLElement, value: boolean = true\n): void {\n  if (value)\n    el.focus()\n  else\n    el.blur()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element focus\n *\n * @param el - Element\n *\n * @return Element focus observable\n */\nexport function watchElementFocus(\n  el: HTMLElement\n): Observable<boolean> {\n  const focus$ = fromEvent(el, \"focus\")\n  const blur$  = fromEvent(el, \"blur\")\n\n  /* Map events to boolean state */\n  return merge(\n    focus$.pipe(mapTo(true)),\n    blur$.pipe(mapTo(false))\n  )\n    .pipe(\n      startWith(el === getActiveElement()),\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, shareReplay, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element offset\n *\n * @param el - Element\n *\n * @return Element offset\n */\nexport function getElementOffset(el: HTMLElement): ElementOffset {\n  return {\n    x: el.scrollLeft,\n    y: el.scrollTop\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element offset\n *\n * @param el - Element\n *\n * @return Element offset observable\n */\nexport function watchElementOffset(\n  el: HTMLElement\n): Observable<ElementOffset> {\n  return merge(\n    fromEvent<UIEvent>(el, \"scroll\"),\n    fromEvent<UIEvent>(window, \"resize\")\n  )\n    .pipe(\n      map(() => getElementOffset(el)),\n      startWith(getElementOffset(el)),\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element text selection\n *\n * @param el - Element\n */\nexport function setElementSelection(\n  el: HTMLElement\n): void {\n  if (el instanceof HTMLInputElement)\n    el.select()\n  else\n    throw new Error(\"Not implemented\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport ResizeObserver from \"resize-observer-polyfill\"\nimport { Observable, fromEventPattern } from \"rxjs\"\nimport { shareReplay, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementSize {\n  width: number                        /* Element width */\n  height: number                       /* Element height */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element size\n *\n * @param el - Element\n *\n * @return Element size\n */\nexport function getElementSize(el: HTMLElement): ElementSize {\n  return {\n    width:  el.offsetWidth,\n    height: el.offsetHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element size\n *\n * @param el - Element\n *\n * @return Element size observable\n */\nexport function watchElementSize(\n  el: HTMLElement\n): Observable<ElementSize> {\n  return fromEventPattern<ElementSize>(next => {\n    new ResizeObserver(([{ contentRect }]) => next({\n      width:  Math.round(contentRect.width),\n      height: Math.round(contentRect.height)\n    }))\n      .observe(el)\n  })\n    .pipe(\n      startWith(getElementSize(el)),\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Key\n */\nexport interface Key {\n  type: string                         /* Key type */\n  claim(): void                        /* Key claim */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether an element may receive keyboard input\n *\n * @param el - Element\n *\n * @return Test result\n */\nexport function isSusceptibleToKeyboard(el: HTMLElement): boolean {\n  switch (el.tagName) {\n\n    /* Form elements */\n    case \"INPUT\":\n    case \"SELECT\":\n    case \"TEXTAREA\":\n      return true\n\n    /* Everything else */\n    default:\n      return el.isContentEditable\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch keyboard\n *\n * @return Keyboard observable\n */\nexport function watchKeyboard(): Observable<Key> {\n  return fromEvent<KeyboardEvent>(window, \"keydown\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      map(ev => ({\n        type: ev.key,\n        claim() {\n          ev.preventDefault()\n          ev.stopPropagation()\n        }\n      })),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEventPattern } from \"rxjs\"\nimport { shareReplay, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch media query\n *\n * @param query - Media query\n *\n * @return Media observable\n */\nexport function watchMedia(query: string): Observable<boolean> {\n  const media = matchMedia(query)\n  return fromEventPattern<boolean>(next =>\n    media.addListener(() => next(media.matches))\n  )\n    .pipe(\n      startWith(media.matches),\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"../element\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle\n */\nexport type Toggle =\n  | \"drawer\"                           /* Toggle for drawer */\n  | \"search\"                           /* Toggle for search */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle map\n */\nconst toggles: Record<Toggle, HTMLInputElement> = {\n  drawer: getElementOrThrow(`[data-md-toggle=drawer]`),\n  search: getElementOrThrow(`[data-md-toggle=search]`)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve the value of a toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value\n */\nexport function getToggle(name: Toggle): boolean {\n  return toggles[name].checked\n}\n\n/**\n * Set toggle\n *\n * Simulating a click event seems to be the most cross-browser compatible way\n * of changing the value while also emitting a `change` event. Before, Material\n * used `CustomEvent` to programmatically change the value of a toggle, but this\n * is a much simpler and cleaner solution which doesn't require a polyfill.\n *\n * @param name - Toggle\n * @param value - Toggle value\n */\nexport function setToggle(name: Toggle, value: boolean): void {\n  if (toggles[name].checked !== value)\n    toggles[name].click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value observable\n */\nexport function watchToggle(name: Toggle): Observable<boolean> {\n  const el = toggles[name]\n  return fromEvent(el, \"change\")\n    .pipe(\n      map(() => el.checked),\n      startWith(el.checked)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport offset\n */\nexport interface ViewportOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport offset\n *\n * On iOS Safari, viewport offset can be negative due to overflow scrolling.\n * As this may induce strange behaviors downstream, we'll just limit it to 0.\n *\n * @return Viewport offset\n */\nexport function getViewportOffset(): ViewportOffset {\n  return {\n    x: Math.max(0, pageXOffset),\n    y: Math.max(0, pageYOffset)\n  }\n}\n\n/**\n * Set viewport offset\n *\n * @param offset - Viewport offset\n */\nexport function setViewportOffset(\n  { x, y }: Partial<ViewportOffset>\n): void {\n  window.scrollTo(x || 0, y || 0)\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport offset\n *\n * @return Viewport offset observable\n */\nexport function watchViewportOffset(): Observable<ViewportOffset> {\n  return merge(\n    fromEvent<UIEvent>(window, \"scroll\"),\n    fromEvent<UIEvent>(window, \"resize\")\n  )\n    .pipe(\n      map(getViewportOffset),\n      startWith(getViewportOffset())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport size\n */\nexport interface ViewportSize {\n  width: number                        /* Viewport width */\n  height: number                       /* Viewport height */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport size\n *\n * @return Viewport size\n */\nexport function getViewportSize(): ViewportSize {\n  return {\n    width:  innerWidth,\n    height: innerHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport size\n *\n * @return Viewport size observable\n */\nexport function watchViewportSize(): Observable<ViewportSize> {\n  return fromEvent<UIEvent>(window, \"resize\")\n    .pipe(\n      map(getViewportSize),\n      startWith(getViewportSize())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  shareReplay\n} from \"rxjs/operators\"\n\nimport { Header } from \"components\"\n\nimport {\n  ViewportOffset,\n  watchViewportOffset\n} from \"../offset\"\nimport {\n  ViewportSize,\n  watchViewportSize\n} from \"../size\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport\n */\nexport interface Viewport {\n  offset: ViewportOffset               /* Viewport offset */\n  size: ViewportSize                   /* Viewport size */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch at options\n */\ninterface WatchAtOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport\n *\n * @return Viewport observable\n */\nexport function watchViewport(): Observable<Viewport> {\n  return combineLatest([\n    watchViewportOffset(),\n    watchViewportSize()\n  ])\n    .pipe(\n      map(([offset, size]) => ({ offset, size })),\n      shareReplay(1)\n    )\n}\n\n/**\n * Watch viewport relative to element\n *\n * @param el - Element\n * @param options - Options\n *\n * @return Viewport observable\n */\nexport function watchViewportAt(\n  el: HTMLElement, { header$, viewport$ }: WatchAtOptions\n): Observable<Viewport> {\n  const offset$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\"),\n      map((): ViewportOffset => ({\n        x: el.offsetLeft,\n        y: el.offsetTop\n      }))\n    )\n\n  /* Compute relative viewport, return hot observable */\n  return combineLatest([header$, viewport$, offset$])\n    .pipe(\n      map(([{ height }, { offset, size }, { x, y }]) => ({\n        offset: {\n          x: offset.x - x,\n          y: offset.y - y + height\n        },\n        size\n      })),\n      shareReplay(1)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, fromEventPattern } from \"rxjs\"\nimport {\n  pluck,\n  share,\n  switchMapTo,\n  tap,\n  throttle\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Worker message\n */\nexport interface WorkerMessage {\n  type: unknown                        /* Message type */\n  data: unknown                        /* Message data */\n}\n\n/**\n * Worker handler\n *\n * @template T - Message type\n */\nexport interface WorkerHandler<\n  T extends WorkerMessage\n> {\n  tx$: Subject<T>                      /* Message transmission subject */\n  rx$: Observable<T>                   /* Message receive observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n *\n * @template T - Worker message type\n */\ninterface WatchOptions<T extends WorkerMessage> {\n  tx$: Observable<T>                   /* Message transmission observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch a web worker\n *\n * This function returns an observable that will send all values emitted by the\n * message observable to the web worker. Web worker communication is expected\n * to be bidirectional (request-response) and synchronous. Messages that are\n * emitted during a pending request are throttled, the last one is emitted.\n *\n * @param worker - Web worker\n * @param options - Options\n *\n * @return Worker message observable\n */\nexport function watchWorker<T extends WorkerMessage>(\n  worker: Worker, { tx$ }: WatchOptions<T>\n): Observable<T> {\n\n  /* Intercept messages from worker-like objects */\n  const rx$ = fromEventPattern<MessageEvent>(next =>\n    worker.addEventListener(\"message\", next)\n  )\n    .pipe(\n      pluck<MessageEvent, T>(\"data\")\n    )\n\n  /* Send and receive messages, return hot observable */\n  return tx$\n    .pipe(\n      throttle(() => rx$, { leading: true, trailing: true }),\n      tap(message => worker.postMessage(message)),\n      switchMapTo(rx$),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndexConfig, SearchIndexOptions } from \"integrations/search\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Feature flags\n */\nexport type Feature =\n  | \"tabs\"                             /* Tabs navigation */\n  | \"instant\"                          /* Instant loading\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * URL configuration\n */\nexport interface UrlConfig {\n  base: string                       /* Base URL */\n  worker: {\n    search: string                   /* Search worker URL */\n  }\n}\n\n/**\n * Search configuration\n */\nexport interface SearchConfig {\n  index?: Promise<SearchIndexOptions>\n  query?: (value: string) => string\n}\n\n/**\n * Configuration\n */\nexport interface Config {\n  url: UrlConfig\n  features: Feature[]                  /* Feature flags */\n  search?: SearchConfig\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Ensure that the given value is a valid configuration\n *\n * We could use `jsonschema` or any other schema validation framework, but that\n * would just add more bloat to the bundle, so we'll keep it plain and simple.\n *\n * @param config - Configuration\n *\n * @return Test result\n */\nexport function isConfig(config: any): config is Config {\n  return typeof config === \"object\"\n      && typeof config.url === \"object\"\n      && typeof config.url.base === \"string\"\n      && typeof config.url.worker === \"object\"\n      && typeof config.url.worker.search === \"string\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// tslint:disable no-null-keyword\n\nimport { JSX as JSXInternal } from \"preact\"\nimport { keys } from \"ramda\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * HTML and SVG attributes\n */\ntype Attributes =\n  & JSXInternal.HTMLAttributes\n  & JSXInternal.SVGAttributes\n  & Record<string, any>\n\n/**\n * Child element\n */\ntype Child =\n  | HTMLElement\n  | SVGElement\n  | Text\n  | string\n  | number\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Create an element\n *\n * @param tag - HTML or SVG tag\n *\n * @return Element\n */\nfunction createElement(tag: string): HTMLElement | SVGElement {\n  switch (tag) {\n\n    /* SVG elements */\n    case \"svg\":\n    case \"path\":\n      return document.createElementNS(\"http://www.w3.org/2000/svg\", tag)\n\n    /* HTML elements */\n    default:\n      return document.createElement(tag)\n  }\n}\n\n/**\n * Set an attribute\n *\n * @param el - Element\n * @param name - Attribute name\n * @param value - Attribute value\n */\nfunction setAttribute(\n  el: HTMLElement | SVGElement, name: string, value: string) {\n  switch (name) {\n\n    /* Attributes to be ignored */\n    case \"xmlns\":\n      break\n\n    /* Attributes of SVG elements */\n    case \"viewBox\":\n    case \"d\":\n      if (typeof value !== \"boolean\")\n        el.setAttributeNS(null, name, value)\n      else if (value)\n        el.setAttributeNS(null, name, \"\")\n      break\n\n    /* Attributes of HTML elements */\n    default:\n      if (typeof value !== \"boolean\")\n        el.setAttribute(name, value)\n      else if (value)\n        el.setAttribute(name, \"\")\n  }\n}\n\n/**\n * Append a child node to an element\n *\n * @param el - Element\n * @param child - Child node(s)\n */\nfunction appendChild(\n  el: HTMLElement | SVGElement, child: Child | Child[]\n): void {\n\n  /* Handle primitive types (including raw HTML) */\n  if (typeof child === \"string\" || typeof child === \"number\") {\n    el.innerHTML += child.toString()\n\n  /* Handle nodes */\n  } else if (child instanceof Node) {\n    el.appendChild(child)\n\n  /* Handle nested children */\n  } else if (Array.isArray(child)) {\n    for (const node of child)\n      appendChild(el, node)\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * JSX factory\n *\n * @param tag - HTML or SVG tag\n * @param attributes - HTML attributes\n * @param children - Child elements\n *\n * @return Element\n */\nexport function h(\n  tag: string, attributes: Attributes | null, ...children: Child[]\n): HTMLElement | SVGElement {\n  const el = createElement(tag)\n\n  /* Set attributes, if any */\n  if (attributes)\n    for (const attr of keys(attributes))\n      setAttribute(el, attr, attributes[attr])\n\n  /* Append child nodes */\n  for (const child of children)\n    appendChild(el, child)\n\n  /* Return element */\n  return el\n}\n\n/* ----------------------------------------------------------------------------\n * Namespace\n * ------------------------------------------------------------------------- */\n\nexport declare namespace h {\n  namespace JSX {\n    type Element = HTMLElement | SVGElement\n    type IntrinsicElements = JSXInternal.IntrinsicElements\n  }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, defer, of } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Cache the last value emitted by an observable in session storage\n *\n * If the key is not found in session storage, the factory is executed and the\n * latest value emitted will automatically be persisted to sessions storage.\n * Note that the values emitted by the returned observable must be serializable\n * as `JSON`, or data will be lost.\n *\n * @template T - Value type\n *\n * @param key - Cache key\n * @param factory - Observable factory\n *\n * @return Value observable\n */\nexport function cache<T>(\n  key: string, factory: () => Observable<T>\n): Observable<T> {\n  return defer(() => {\n    const data = sessionStorage.getItem(key)\n    if (data) {\n      return of(JSON.parse(data) as T)\n\n    /* Retrieve value from observable factory and write to storage */\n    } else {\n      const value$ = factory()\n      value$.subscribe(value => {\n        try {\n          sessionStorage.setItem(key, JSON.stringify(value))\n        } catch (err) {\n          /* Uncritical, just swallow */\n        }\n      })\n\n      /* Return value */\n      return value$\n    }\n  })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { getElementOrThrow } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Translation keys\n */\ntype TranslateKey =\n  | \"clipboard.copy\"                   /* Copy to clipboard */\n  | \"clipboard.copied\"                 /* Copied to clipboard */\n  | \"search.config.lang\"               /* Search language */\n  | \"search.config.pipeline\"           /* Search pipeline */\n  | \"search.config.separator\"          /* Search separator */\n  | \"search.result.placeholder\"        /* Type to start searching */\n  | \"search.result.none\"               /* No matching documents */\n  | \"search.result.one\"                /* 1 matching document */\n  | \"search.result.other\"              /* # matching documents */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Translations\n */\nlet lang: Record<string, string>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Translate the given key\n *\n * @param key - Key to be translated\n * @param value - Value to be replaced\n *\n * @return Translation\n */\nexport function translate(key: TranslateKey, value?: string): string {\n  if (typeof lang === \"undefined\") {\n    const el = getElementOrThrow(\"#__lang\")\n    lang = JSON.parse(el.textContent!)\n  }\n  if (typeof lang[key] === \"undefined\") {\n    throw new ReferenceError(`Invalid translation: ${key}`)\n  }\n  return typeof value !== \"undefined\"\n    ? lang[key].replace(\"#\", value)\n    : lang[key]\n}\n\n/**\n * Truncate a string after the given number of characters\n *\n * This is not a very reasonable approach, since the summaries kind of suck.\n * It would be better to create something more intelligent, highlighting the\n * search occurrences and making a better summary out of it, but this note was\n * written three years ago, so who knows if we'll ever fix it.\n *\n * @param value - Value to be truncated\n * @param n - Number of characters\n *\n * @return Truncated value\n */\nexport function truncate(value: string, n: number): string {\n  let i = n\n  if (value.length > i) {\n    while (value[i] !== \" \" && --i > 0); // tslint:disable-line\n    return `${value.substring(0, i)}...`\n  }\n  return value\n}\n\n/**\n * Round a number for display with source facts\n *\n * This is a reverse engineered version of GitHub's weird rounding algorithm\n * for stars, forks and all other numbers. While all numbers below `1,000` are\n * returned as-is, bigger numbers are converted to fixed numbers:\n *\n * - `1,049` => `1k`\n * - `1,050` => `1.1k`\n * - `1,949` => `1.9k`\n * - `1,950` => `2k`\n *\n * @param value - Original value\n *\n * @return Rounded value\n */\nexport function round(value: number): string {\n  if (value > 999) {\n    const digits = +((value - 950) % 1000 > 99)\n    return `${((value + 1) / 1000).toFixed(digits)}k`\n  } else {\n    return value.toString()\n  }\n}\n\n/**\n * Simple hash function\n *\n * @see https://bit.ly/2wsVjJ4 - Original source\n *\n * @param value - Value to be hashed\n *\n * @return Hash as 32bit integer\n */\nexport function hash(value: string): number {\n    let h = 0\n    for (let i = 0, len = value.length; i < len; i++) {\n      h  = ((h << 5) - h) + value.charCodeAt(i)\n      h |= 0 // Convert to 32bit integer\n    }\n    return h\n  }\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./header\"\nexport * from \"./hero\"\nexport * from \"./main\"\nexport * from \"./navigation\"\nexport * from \"./search\"\nexport * from \"./shared\"\nexport * from \"./tabs\"\nexport * from \"./toc\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar offset\n *\n * @param el - Sidebar element\n * @param value - Sidebar offset\n */\nexport function setSidebarOffset(\n  el: HTMLElement, value: number\n): void {\n  el.style.top = `${value}px`\n}\n\n/**\n * Reset sidebar offset\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarOffset(\n  el: HTMLElement\n): void {\n  el.style.top = \"\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar height\n *\n * @param el - Sidebar element\n * @param value - Sidebar height\n */\nexport function setSidebarHeight(\n  el: HTMLElement, value: number\n): void {\n  el.style.height = `${value}px`\n}\n\n/**\n * Reset sidebar height\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarHeight(\n  el: HTMLElement\n): void {\n  el.style.height = \"\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar lock\n *\n * @param el - Sidebar element\n * @param value - Whether the sidebar is locked\n */\nexport function setSidebarLock(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"lock\" : \"\")\n}\n\n/**\n * Reset sidebar lock\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarLock(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { EMPTY, Observable, of } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  map,\n  scan,\n  shareReplay,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { getElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Component\n */\nexport type Component =\n  | \"container\"                        /* Container */\n  | \"header\"                           /* Header */\n  | \"header-title\"                     /* Header title */\n  | \"hero\"                             /* Hero */\n  | \"main\"                             /* Main area */\n  | \"navigation\"                       /* Navigation */\n  | \"search\"                           /* Search */\n  | \"search-query\"                     /* Search input */\n  | \"search-reset\"                     /* Search reset */\n  | \"search-result\"                    /* Search results */\n  | \"skip\"                             /* Skip link */\n  | \"tabs\"                             /* Tabs */\n  | \"toc\"                              /* Table of contents */\n\n/**\n * Component map\n */\nexport type ComponentMap = {\n  [P in Component]?: HTMLElement\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Component map observable\n */\nlet components$: Observable<ComponentMap>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup bindings to components with given names\n *\n * This function will maintain bindings to the elements identified by the given\n * names in-between document switches and update the elements in-place.\n *\n * @param names - Component names\n * @param options - Options\n */\nexport function setupComponents(\n  names: Component[], { document$ }: WatchOptions\n): void {\n  components$ = document$\n    .pipe(\n\n      /* Build component map */\n      map(document => names.reduce<ComponentMap>((components, name) => {\n        const el = getElement(`[data-md-component=${name}]`, document)\n        return {\n          ...components,\n          ...typeof el !== \"undefined\" ? { [name]: el } : {}\n        }\n      }, {})),\n\n      /* Re-compute component map on document switch */\n      scan((prev, next) => {\n        for (const name of names) {\n          switch (name) {\n\n            /* Top-level components: update */\n            case \"header-title\":\n            case \"container\":\n            case \"skip\":\n              if (name in prev && typeof prev[name] !== \"undefined\") {\n                prev[name]!.replaceWith(next[name]!)\n                prev[name] = next[name]\n              }\n              break\n\n            /* All other components: rebind */\n            default:\n              if (typeof next[name] !== \"undefined\")\n                prev[name] = getElement(`[data-md-component=${name}]`)\n              else\n                delete prev[name]\n          }\n        }\n        return prev\n      }),\n\n      /* Convert to hot observable */\n      shareReplay(1)\n    )\n}\n\n/**\n * Retrieve a component\n *\n * The returned observable will only re-emit if the element changed, i.e. if\n * it was replaced from a document which was switched to.\n *\n * @template T - Element type\n *\n * @param name - Component name\n *\n * @return Element observable\n */\nexport function useComponent<T extends HTMLInputElement>(\n  name: \"search-query\"\n): Observable<T>\nexport function useComponent<T extends HTMLElement>(\n  name: Component\n): Observable<T>\nexport function useComponent<T extends HTMLElement>(\n  name: Component\n): Observable<T> {\n  return components$\n    .pipe(\n      switchMap(components => (\n        typeof components[name] !== \"undefined\"\n          ? of(components[name] as T)\n          : EMPTY\n      )),\n      distinctUntilChanged()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set anchor blur\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is blurred\n */\nexport function setAnchorBlur(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"blur\" : \"\")\n}\n\n/**\n * Reset anchor blur\n *\n * @param el - Anchor element\n */\nexport function resetAnchorBlur(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set anchor active\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is active\n */\nexport function setAnchorActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.classList.toggle(\"md-nav__link--active\", value)\n}\n\n/**\n * Reset anchor active\n *\n * @param el - Anchor element\n */\nexport function resetAnchorActive(\n  el: HTMLElement\n): void {\n  el.classList.remove(\"md-nav__link--active\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./sidebar\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h, translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * CSS classes\n */\nconst css = {\n  container: \"md-clipboard md-icon\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Path of `file-search-outline` icon\n */\nconst path =\n  \"M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 \" +\n  \"21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a 'copy-to-clipboard' button\n *\n * @param id - Unique identifier\n *\n * @return Element\n */\nexport function renderClipboard(\n  id: string\n) {\n  return (\n    <button\n      class={css.container}\n      title={translate(\"clipboard.copy\")}\n      data-clipboard-target={`#${id} code`}\n    >\n      <svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 24 24\">\n        <path d={path}></path>\n      </svg>\n    </button>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchResult } from \"integrations/search\"\nimport { h, truncate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * CSS classes\n */\nconst css = {\n  item:    \"md-search-result__item\",\n  link:    \"md-search-result__link\",\n  article: \"md-search-result__article md-search-result__article--document\",\n  section: \"md-search-result__article\",\n  title:   \"md-search-result__title\",\n  teaser:  \"md-search-result__teaser\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Path of `file-search-outline` icon\n */\nconst path =\n  \"M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H13C12.59,21.75 12.2,21.44 \" +\n  \"11.86,21.1C11.53,20.77 11.25,20.4 11,20H6V4H13V9H18V10.18C18.71,10.34 \" +\n  \"19.39,10.61 20,11V8L14,2M20.31,18.9C21.64,16.79 21,14 \" +\n  \"18.91,12.68C16.8,11.35 14,12 12.69,14.08C11.35,16.19 12,18.97 \" +\n  \"14.09,20.3C15.55,21.23 17.41,21.23 \" +\n  \"18.88,20.32L22,23.39L23.39,22L20.31,18.9M16.5,19A2.5,2.5 0 0,1 \" +\n  \"14,16.5A2.5,2.5 0 0,1 16.5,14A2.5,2.5 0 0,1 19,16.5A2.5,2.5 0 0,1 16.5,19Z\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a search result\n *\n * @param result - Search result\n *\n * @return Element\n */\nexport function renderSearchResult(\n  { article, sections }: SearchResult\n) {\n\n  /* Render icon */\n  const icon = (\n    <div class=\"md-search-result__icon md-icon\">\n      <svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 24 24\">\n        <path d={path}></path>\n      </svg>\n    </div>\n  )\n\n  /* Render article and sections */\n  const children = [article, ...sections].map(document => {\n    const { location, title, text } = document\n    return (\n      <a href={location} class={css.link} tabIndex={-1}>\n        <article class={\"parent\" in document ? css.section : css.article}>\n          {!(\"parent\" in document) && icon}\n          <h1 class={css.title}>{title}</h1>\n          {text.length > 0 && <p class={css.teaser}>{truncate(text, 320)}</p>}\n        </article>\n      </a>\n    )\n  })\n\n  /* Render search result */\n  return (\n    <li class={css.item}>\n      {children}\n    </li>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SourceFacts } from \"patches/source\"\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * CSS classes\n */\nconst css = {\n  facts: \"md-source__facts\",\n  fact:  \"md-source__fact\"\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render source facts\n *\n * @param facts - Source facts\n *\n * @return Element\n */\nexport function renderSource(\n  facts: SourceFacts\n) {\n  const children = facts.map(fact => (\n    <li class={css.fact}>{fact}</li>\n  ))\n  return (\n    <ul class={css.facts}>\n      {children}\n    </ul>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * CSS classes\n */\nconst css = {\n  wrapper: \"md-typeset__scrollwrap\",\n  table:   \"md-typeset__table\"\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a table inside a wrapper to improve scrolling on mobile\n *\n * @param table - Table element\n *\n * @return Element\n */\nexport function renderTable(\n  table: HTMLTableElement\n) {\n  return (\n    <div class={css.wrapper}>\n      <div class={css.table}>\n        {table}\n      </div>\n    </div>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Global augmentations\n */\ndeclare global {\n  interface CSSStyleDeclaration {\n    webkitOverflowScrolling: \"touch\" | \"\"\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set overflow scrolling\n *\n * @param el - Scrollable element\n */\nexport function setOverflowScrolling(\n  el: HTMLElement\n): void {\n  el.style.webkitOverflowScrolling = \"touch\"\n}\n\n/**\n * Reset overflow scrolling\n *\n * @param el - Scrollable element\n */\nexport function resetOverflowScrolling(\n  el: HTMLElement\n): void {\n  el.style.webkitOverflowScrolling = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndexOptions, SearchResult } from \"integrations/search\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search message type\n */\nexport const enum SearchMessageType {\n  SETUP,                               /* Search index setup */\n  DUMP,                                /* Search index dump */\n  QUERY,                               /* Search query */\n  RESULT                               /* Search results */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message containing the data necessary to setup the search index\n */\nexport interface SearchSetupMessage {\n  type: SearchMessageType.SETUP        /* Message type */\n  data: SearchIndexOptions             /* Message data */\n}\n\n/**\n * A message containing the a dump of the search index\n */\nexport interface SearchDumpMessage {\n  type: SearchMessageType.DUMP        /* Message type */\n  data: string                        /* Message data */\n}\n\n/**\n * A message containing a search query\n */\nexport interface SearchQueryMessage {\n  type: SearchMessageType.QUERY        /* Message type */\n  data: string                         /* Message data */\n}\n\n/**\n * A message containing results for a search query\n */\nexport interface SearchResultMessage {\n  type: SearchMessageType.RESULT       /* Message type */\n  data: SearchResult[]                 /* Message data */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message exchanged with the search worker\n */\nexport type SearchMessage =\n  | SearchSetupMessage\n  | SearchDumpMessage\n  | SearchQueryMessage\n  | SearchResultMessage\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Type guard for search setup messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchSetupMessage(\n  message: SearchMessage\n): message is SearchSetupMessage {\n  return message.type === SearchMessageType.SETUP\n}\n\n/**\n * Type guard for search dump messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchDumpMessage(\n  message: SearchMessage\n): message is SearchDumpMessage {\n  return message.type === SearchMessageType.DUMP\n}\n\n/**\n * Type guard for search query messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchQueryMessage(\n  message: SearchMessage\n): message is SearchQueryMessage {\n  return message.type === SearchMessageType.QUERY\n}\n\n/**\n * Type guard for search result messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchResultMessage(\n  message: SearchMessage\n): message is SearchResultMessage {\n  return message.type === SearchMessageType.RESULT\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, asyncScheduler, from } from \"rxjs\"\nimport { ajax } from \"rxjs/ajax\"\nimport {\n  map,\n  observeOn,\n  pluck,\n  shareReplay,\n  switchMap,\n  take,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchWorker } from \"browser\"\nimport { SearchIndexConfig, SearchIndexOptions } from \"integrations/search\"\n\nimport { translate } from \"utilities\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchSetupMessage,\n  isSearchResultMessage\n} from \"../message\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  base: string                         /* Base url */\n  index?: Promise<SearchIndexOptions>  /* Promise resolving with index */\n  location$: Observable<URL>           /* Location observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup search web worker\n *\n * This function will create a web worker to setup and query the search index\n * which is done using `lunr`. The index can be passed explicitly in order to\n * enable hacks like _localsearch_ via search index embedding as JSON. If no\n * index is given, this function will load it from the default location.\n *\n * @param url - Worker url\n * @param options - Options\n *\n * @return Worker handler\n */\nexport function setupSearchWorker(\n  url: string, { base, index, location$ }: SetupOptions\n): WorkerHandler<SearchMessage> {\n  const worker = new Worker(url)\n\n  /* Ensure stable base URL */\n  const origin$ = location$\n    .pipe(\n      take(1),\n      map(({ href }) => new URL(base, href)\n        .toString()\n        .replace(/\\/$/, \"\")\n      )\n    )\n\n  /* Create communication channels and resolve relative links */\n  const tx$ = new Subject<SearchMessage>()\n  const rx$ = watchWorker(worker, { tx$ })\n    .pipe(\n      withLatestFrom(origin$),\n      map(([message, origin]) => {\n        if (isSearchResultMessage(message)) {\n          for (const { article, sections } of message.data) {\n            article.location = `${origin}/${article.location}`\n            for (const section of sections)\n              section.location = `${origin}/${section.location}`\n          }\n        }\n        return message\n      }),\n      shareReplay(1)\n    )\n\n  /* Fetch index if it wasn't passed explicitly */\n  const index$ = typeof index !== \"undefined\"\n    ? from(index)\n    : origin$\n        .pipe(\n          switchMap(origin => ajax({\n            url: `${origin}/search/search_index.json`,\n            responseType: \"json\",\n            withCredentials: true\n          })\n            .pipe<SearchIndexOptions>(\n              pluck(\"response\")\n            )\n          )\n        )\n\n  function isConfigDefaultLang(config: SearchIndexConfig) {\n    return config.lang.length === 1 && config.lang[0] === \"en\"\n  }\n\n  function isConfigDefaultSeparator(config: SearchIndexConfig) {\n    return config.separator === \"[\\s\\-]+\"\n  }\n\n  index$\n    .pipe(\n      map(({ config, ...rest }) => ({\n        config: {\n          lang: isConfigDefaultLang(config)\n            ? [translate(\"search.config.lang\")]\n            : config.lang,\n          separator: isConfigDefaultSeparator(config)\n            ? translate(\"search.config.separator\")\n            : config.separator\n        },\n        pipeline: translate(\"search.config.pipeline\")\n          .split(/\\s*,\\s*/)\n          .filter(Boolean) as any, // Hack\n        ...rest\n      }))\n    )\n  //     .subscribe(console.log)\n\n  // /* Send index to worker */\n  // index$\n    .pipe(\n      map((data): SearchSetupMessage => ({\n        type: SearchMessageType.SETUP,\n        data\n      })),\n      observeOn(asyncScheduler) // make sure it runs on the next tick\n    )\n      .subscribe(tx$.next.bind(tx$))\n\n  /* Return worker handler */\n  return { tx$, rx$ }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./react\"\nexport * from \"./set\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./react\"\nexport * from \"./set\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./layer\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, pipe } from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../../shared\"\nimport {\n  NavigationLayer,\n  applyNavigationLayer,\n  watchNavigationLayer\n} from \"../layer\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Navigation for [screen -]\n */\ninterface NavigationBelowScreen {\n  layer: NavigationLayer               /* Active layer */\n}\n\n/**\n * Navigation for [screen +]\n */\ninterface NavigationAboveScreen {\n  sidebar: Sidebar                     /* Sidebar */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Navigation\n */\nexport type Navigation =\n  | NavigationBelowScreen\n  | NavigationAboveScreen\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Screen media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount navigation from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountNavigation(\n  { header$, main$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Navigation> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount navigation in sidebar */\n          if (screen) {\n            return watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ }),\n                map(sidebar => ({ sidebar }))\n              )\n\n          /* [screen -]: Mount navigation in drawer */\n          } else {\n            const els = getElements(\"nav\", el)\n            return watchNavigationLayer(els)\n              .pipe(\n                applyNavigationLayer(els),\n                map(layer => ({ layer }))\n              )\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./react\"\nexport * from \"./set\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  tap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { Main } from \"../../../main\"\nimport { Sidebar } from \"../_\"\nimport {\n  resetSidebarHeight,\n  resetSidebarLock,\n  resetSidebarOffset,\n  setSidebarHeight,\n  setSidebarLock,\n  setSidebarOffset\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  header$: Observable<Header>          /* Header observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch sidebar\n *\n * This function returns an observable that computes the visual parameters of\n * the sidebar which depends on the vertical viewport offset, as well as the\n * height of the main area. When the page is scrolled beyond the header, the\n * sidebar is locked and fills the remaining space.\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Sidebar observable\n */\nexport function watchSidebar(\n  el: HTMLElement, { main$, viewport$ }: WatchOptions\n): Observable<Sidebar> {\n\n  /* Adjust for internal main area offset */\n  const adjust$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\"),\n      map(() => parseFloat(\n        getComputedStyle(el.parentElement!)\n          .getPropertyValue(\"padding-top\")\n      )),\n      distinctUntilChanged()\n    )\n\n  /* Compute the sidebar's available height */\n  const height$ = viewport$\n    .pipe(\n      withLatestFrom(adjust$, main$),\n      map(([{ offset: { y } }, adjust, { offset, height }]) => (\n        height\n          + Math.min(adjust, Math.max(0, y - offset))\n          - adjust\n      )),\n      distinctUntilChanged()\n    )\n\n  /* Compute whether the sidebar should be locked */\n  const lock$ = viewport$\n    .pipe(\n      withLatestFrom(adjust$, main$),\n      map(([{ offset: { y } }, adjust, { offset }]) => (\n        y >= offset + adjust\n      )),\n      distinctUntilChanged()\n    )\n\n  /* Combine into single observable */\n  return combineLatest([height$, lock$])\n    .pipe(\n      map(([height, lock]) => ({ height, lock }))\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply sidebar\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySidebar(\n  el: HTMLElement, { header$ }: ApplyOptions\n): MonoTypeOperatorFunction<Sidebar> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    withLatestFrom(header$),\n    tap(([{ height, lock }, { height: offset }]) => {\n      setSidebarHeight(el, height)\n      setSidebarLock(el, lock)\n\n      /* Set offset in locked state depending on header height */\n      if (lock)\n        setSidebarOffset(el, offset)\n      else\n        resetSidebarOffset(el)\n    }),\n\n    /* Re-map to sidebar */\n    map(([sidebar]) => sidebar),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetSidebarOffset(el)\n      resetSidebarHeight(el)\n      resetSidebarLock(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { findLast } from \"ramda\"\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  fromEvent,\n  merge,\n  pipe\n} from \"rxjs\"\nimport {\n  delay,\n  finalize,\n  map,\n  observeOn,\n  scan,\n  tap\n} from \"rxjs/operators\"\n\nimport { getElement, getElementOrThrow } from \"browser\"\n\nimport { NavigationLayer } from \"../_\"\nimport {\n  resetOverflowScrolling,\n  setOverflowScrolling\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch navigation layer\n *\n * On iOS we want to add `-webkit-overflow-scrolling: touch` for the menus\n * contained in the drawer, but as the navigational layers are nested, we can\n * only add it to the topmost layer or extremely weird cropping will occur.\n * This implementation keeps track of the previous and current layer.\n *\n * @param els - Navigation elements\n *\n * @return Navigation layer observable\n */\nexport function watchNavigationLayer(\n  els: HTMLElement[]\n): Observable<NavigationLayer> {\n  const table = new Map<HTMLInputElement, HTMLElement>()\n  for (const el of els) {\n    const label = getElement<HTMLLabelElement>(\"label\", el)\n    if (typeof label !== \"undefined\") {\n      const input = getElementOrThrow<HTMLInputElement>(`#${label.htmlFor}`)\n      table.set(input, el)\n    }\n  }\n\n  /* Determine topmost layer */\n  const layer$ = merge(...[...table.keys()].map(input => (\n    fromEvent(input, \"change\")\n  )))\n    .pipe(\n      map(() => getElementOrThrow(\".md-nav__list\", table.get(\n        findLast(({ checked }) => checked, [...table.keys()])!\n      )))\n    )\n\n  /* Return previous and next layer */\n  return layer$\n    .pipe(\n      map(next => ({ next })),\n      scan(({ next: prev }, { next }) => ({ prev, next }))\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply navigation layer\n *\n * @param els - Navigation elements\n *\n * @return Operator function\n */\nexport function applyNavigationLayer(\n  els: HTMLElement[]\n): MonoTypeOperatorFunction<NavigationLayer> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ prev }) => {\n      if (prev)\n        resetOverflowScrolling(prev)\n    }),\n\n    /* Wait until transition has finished */\n    delay(250),\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ next }) => {\n      setOverflowScrolling(next)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      for (const el of els)\n        resetOverflowScrolling(\n          getElementOrThrow(\".md-nav__list\", el)\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nexport * from \"./_\"\nexport * from \"./anchor\"\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  Observable,\n  OperatorFunction,\n  combineLatest,\n  of,\n  pipe\n} from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../../shared\"\nimport {\n  AnchorList,\n  applyAnchorList,\n  watchAnchorList\n} from \"../anchor\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Table of contents for [tablet -]\n */\ninterface TableOfContentsBelowTablet {} // tslint:disable-line\n\n/**\n * Table of contents for [tablet +]\n */\ninterface TableOfContentsAboveTablet {\n  sidebar: Sidebar                     /* Sidebar */\n  anchors: AnchorList                  /* Anchor list */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Table of contents\n */\nexport type TableOfContents =\n  | TableOfContentsBelowTablet\n  | TableOfContentsAboveTablet\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  tablet$: Observable<boolean>         /* Tablet media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount table of contents from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTableOfContents(\n  { header$, main$, viewport$, tablet$}: MountOptions\n): OperatorFunction<HTMLElement, TableOfContents> {\n  return pipe(\n    switchMap(el => tablet$\n      .pipe(\n        switchMap(tablet => {\n\n          /* [tablet +]: Mount table of contents in sidebar */\n          if (tablet) {\n            const els = getElements<HTMLAnchorElement>(\".md-nav__link\", el)\n\n            /* Watch and apply sidebar */\n            const sidebar$ = watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ })\n              )\n\n            /* Watch and apply anchor list (scroll spy) */\n            const anchors$ = watchAnchorList(els, { header$, viewport$ })\n              .pipe(\n                applyAnchorList(els)\n              )\n\n            /* Combine into a single hot observable */\n            return combineLatest([sidebar$, anchors$])\n              .pipe(\n                map(([sidebar, anchors]) => ({ sidebar, anchors }))\n              )\n\n          /* [tablet -]: Unmount table of contents */\n          } else {\n            return of({})\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { reverse } from \"ramda\"\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  bufferCount,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  scan,\n  startWith,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, getElement } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { AnchorList } from \"../_\"\nimport {\n  resetAnchorActive,\n  resetAnchorBlur,\n  setAnchorActive,\n  setAnchorBlur\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch anchor list\n *\n * This is effectively a scroll-spy implementation which will account for the\n * fixed header and automatically re-calculate anchor offsets when the viewport\n * is resized. The returned observable will only emit if the anchor list needs\n * to be repainted.\n *\n * This implementation tracks an anchor element's entire path starting from its\n * level up to the top-most anchor element, e.g. `[h3, h2, h1]`. Although the\n * Material theme currently doesn't make use of this information, it enables\n * the styling of the entire hierarchy through customization.\n *\n * Note that the current anchor is the last item of the `prev` anchor list.\n *\n * @param els - Anchor elements\n * @param options - Options\n *\n * @return Anchor list observable\n */\nexport function watchAnchorList(\n  els: HTMLAnchorElement[], { header$, viewport$ }: WatchOptions\n): Observable<AnchorList> {\n  const table = new Map<HTMLAnchorElement, HTMLElement>()\n  for (const el of els) {\n    const id = decodeURIComponent(el.hash.substring(1))\n    const target = getElement(`[id=\"${id}\"]`)\n    if (typeof target !== \"undefined\")\n      table.set(el, target)\n  }\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      map(header => 18 + header.height)\n    )\n\n  /* Compute partition of previous and next anchors */\n  const partition$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\"),\n\n      /* Build index to map anchor paths to vertical offsets */\n      map(() => {\n        let path: HTMLAnchorElement[] = []\n        return [...table].reduce((index, [anchor, target]) => {\n          while (path.length) {\n            const last = table.get(path[path.length - 1])!\n            if (last.tagName >= target.tagName) {\n              path.pop()\n            } else {\n              break\n            }\n          }\n\n          /* If the current anchor is hidden, continue with its parent */\n          let offset = target.offsetTop\n          while (!offset && target.parentElement) {\n            target = target.parentElement\n            offset = target.offsetTop\n          }\n\n          /* Map reversed anchor path to vertical offset */\n          return index.set(\n            reverse(path = [...path, anchor]),\n            offset\n          )\n        }, new Map<HTMLAnchorElement[], number>())\n      }),\n\n      /* Re-compute partition when viewport offset changes */\n      switchMap(index => combineLatest([adjust$, viewport$])\n        .pipe(\n          scan(([prev, next], [adjust, { offset: { y } }]) => {\n\n            /* Look forward */\n            while (next.length) {\n              const [, offset] = next[0]\n              if (offset - adjust < y) {\n                prev = [...prev, next.shift()!]\n              } else {\n                break\n              }\n            }\n\n            /* Look backward */\n            while (prev.length) {\n              const [, offset] = prev[prev.length - 1]\n              if (offset - adjust >= y) {\n                next = [prev.pop()!, ...next]\n              } else {\n                break\n              }\n            }\n\n            /* Return partition */\n            return [prev, next]\n          }, [[], [...index]]),\n          distinctUntilChanged((a, b) => {\n            return a[0] === b[0]\n                && a[1] === b[1]\n          })\n        )\n      )\n    )\n\n  /* Compute and return anchor list migrations */\n  return partition$\n    .pipe(\n      map(([prev, next]) => ({\n        prev: prev.map(([path]) => path),\n        next: next.map(([path]) => path)\n      })),\n\n      /* Extract anchor list migrations */\n      startWith({ prev: [], next: [] }),\n      bufferCount(2, 1),\n      map(([a, b]) => {\n\n        /* Moving down */\n        if (a.prev.length < b.prev.length) {\n          return {\n            prev: b.prev.slice(Math.max(0, a.prev.length - 1), b.prev.length),\n            next: []\n          }\n\n        /* Moving up */\n        } else {\n          return {\n            prev: b.prev.slice(-1),\n            next: b.next.slice(0, b.next.length - a.next.length)\n          }\n        }\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply anchor list\n *\n * @param els - Anchor elements\n *\n * @return Operator function\n */\nexport function applyAnchorList(\n  els: HTMLAnchorElement[]\n): MonoTypeOperatorFunction<AnchorList> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ prev, next }) => {\n\n      /* Look forward */\n      for (const [el] of next) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n\n      /* Look backward */\n      prev.forEach(([el], index) => {\n        setAnchorActive(el, index === prev.length - 1)\n        setAnchorBlur(el, true)\n      })\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      for (const el of els) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { SearchResult } from \"integrations/search\"\n\nimport { SearchQuery } from \"../query\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search\n */\nexport interface Search {\n  query: SearchQuery                   /* Search query */\n  result: SearchResult[]               /* Search result list */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n  reset$: Observable<void>             /* Search reset observable */\n  result$: Observable<SearchResult[]>  /* Search result observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearch(\n  { query$, reset$, result$ }: MountOptions\n): OperatorFunction<HTMLElement, Search> {\n  return pipe(\n    switchMap(() => combineLatest([query$, result$, reset$])\n      .pipe(\n        map(([query, result]) => ({ query, result }))\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest, fromEvent, merge } from \"rxjs\"\nimport {\n  delay,\n  distinctUntilChanged,\n  map,\n  startWith\n} from \"rxjs/operators\"\n\nimport { watchElementFocus } from \"browser\"\n\nimport { SearchQuery } from \"../_\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  transform?(value: string): string    /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Default transformation function\n *\n * Rogue control characters are filtered before handing the query to the\n * search index, as `lunr` will throw otherwise.\n *\n * @param value - Query value\n *\n * @return Transformed query value\n */\nfunction defaultTransform(value: string): string {\n  return value\n    .replace(/(?:^|\\s+)[*+-:^~]+(?=\\s+|$)/g, \"\")\n    .trim()\n    .replace(/\\s+|\\b$/g, \"* \")\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search query\n *\n * Note that the focus event which triggers re-reading the current query value\n * is delayed by `1ms` so the input's empty state is allowed to propagate.\n *\n * @param el - Search query element\n * @param options - Options\n *\n * @return Search query observable\n */\nexport function watchSearchQuery(\n  el: HTMLInputElement, { transform }: WatchOptions = {}\n): Observable<SearchQuery> {\n  const fn = transform || defaultTransform\n\n  /* Intercept keyboard events */\n  const value$ = merge(\n    fromEvent(el, \"keyup\"),\n    fromEvent(el, \"focus\").pipe(delay(1))\n  )\n    .pipe(\n      map(() => fn(el.value)),\n      startWith(fn(el.value)),\n      distinctUntilChanged()\n    )\n\n  /* Intercept focus events */\n  const focus$ = watchElementFocus(el)\n\n  /* Combine into a single observable */\n  return combineLatest([value$, focus$])\n    .pipe(\n      map(([value, focus]) => ({ value, focus }))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, setToggle } from \"browser\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchQueryMessage\n} from \"workers\"\n\nimport { watchSearchQuery } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search query\n */\nexport interface SearchQuery {\n  value: string                        /* Query value */\n  focus: boolean                       /* Query focus */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  transform?(value: string): string    /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search query from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchQuery(\n  { tx$ }: WorkerHandler<SearchMessage>, options: MountOptions = {}\n): OperatorFunction<HTMLInputElement, SearchQuery> {\n  return pipe(\n    switchMap(el => {\n      const query$ = watchSearchQuery(el, options)\n\n      /* Subscribe worker to search query */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"value\"),\n          map(({ value }): SearchQueryMessage => ({\n            type: SearchMessageType.QUERY,\n            data: value\n          }))\n        )\n          .subscribe(tx$.next.bind(tx$))\n\n      /* Toggle search on focus */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"focus\")\n        )\n          .subscribe(({ focus }) => {\n            if (focus)\n              setToggle(\"search\", focus)\n          })\n\n      /* Return search query */\n      return query$\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  mapTo,\n  startWith,\n  switchMap,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport { setElementFocus } from \"browser\"\n\nimport { useComponent } from \"../../../_\"\nimport { watchSearchReset } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search reset from source observable\n *\n * @return Operator function\n */\nexport function mountSearchReset(): OperatorFunction<HTMLElement, void> {\n  return pipe(\n    switchMap(el => watchSearchReset(el)\n      .pipe(\n        switchMapTo(useComponent(\"search-query\")),\n        tap(setElementFocus),\n        mapTo(undefined)\n      )\n    ),\n    startWith(undefined)\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { mapTo } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search reset\n *\n * @param el - Search reset element\n *\n * @return Search reset observable\n */\nexport function watchSearchReset(\n  el: HTMLElement\n): Observable<void> {\n  return fromEvent(el, \"click\")\n    .pipe(\n      mapTo(undefined)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set number of search results\n *\n * @param el - Search result metadata element\n * @param value - Number of results\n */\nexport function setSearchResultMeta(\n  el: HTMLElement, value: number\n): void {\n  switch (value) {\n\n    /* No results */\n    case 0:\n      el.textContent = translate(\"search.result.none\")\n      break\n\n    /* One result */\n    case 1:\n      el.textContent = translate(\"search.result.one\")\n      break\n\n    /* Multiple result */\n    default:\n      el.textContent = translate(\"search.result.other\", value.toString())\n  }\n}\n\n/**\n * Reset number of search results\n *\n * @param el - Search result metadata element\n */\nexport function resetSearchResultMeta(\n  el: HTMLElement\n): void {\n  el.textContent = translate(\"search.result.placeholder\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Add an element to the search result list\n *\n * @param el - Search result list element\n * @param child - Search result element\n */\nexport function addToSearchResultList(\n  el: HTMLElement, child: HTMLElement\n): void {\n  el.appendChild(child)\n}\n\n/**\n * Reset search result list\n *\n * @param el - Search result list element\n */\nexport function resetSearchResultList(\n  el: HTMLElement\n): void {\n  el.innerHTML = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport {\n  finalize,\n  map,\n  mapTo,\n  observeOn,\n  scan,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"browser\"\nimport { SearchResult } from \"integrations/search\"\nimport { renderSearchResult } from \"templates\"\n\nimport { SearchQuery } from \"../../query\"\nimport {\n  addToSearchResultList,\n  resetSearchResultList,\n  resetSearchResultMeta,\n  setSearchResultMeta\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  query$: Observable<SearchQuery>     /* Search query observable */\n  fetch$: Observable<boolean>         /* Result fetch observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply search results\n *\n * This function will perform a lazy rendering of the search results, depending\n * on the vertical offset of the search result container. When the scroll offset\n * reaches the bottom of the element, more results are fetched and rendered.\n *\n * @param el - Search result element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySearchResult(\n  el: HTMLElement, { query$, fetch$ }: ApplyOptions\n): MonoTypeOperatorFunction<SearchResult[]> {\n  const list = getElementOrThrow(\".md-search-result__list\", el)\n  const meta = getElementOrThrow(\".md-search-result__meta\", el)\n  return pipe(\n\n    /* Apply search result metadata */\n    withLatestFrom(query$),\n    map(([result, query]) => {\n      if (query.value) {\n        setSearchResultMeta(meta, result.length)\n      } else {\n        resetSearchResultMeta(meta)\n      }\n      return result\n    }),\n\n    /* Apply search result list */\n    switchMap(result => fetch$\n      .pipe(\n\n        /* Defer repaint to next animation frame */\n        observeOn(animationFrameScheduler),\n        scan(index => {\n          const container = el.parentElement!\n          while (index < result.length) {\n            addToSearchResultList(list, renderSearchResult(result[index++]))\n            if (container.scrollHeight - container.offsetHeight > 16)\n              break\n          }\n          return index\n        }, 0),\n\n        /* Re-map to search result */\n        mapTo(result),\n\n        /* Reset on complete or error */\n        finalize(() => {\n          resetSearchResultList(list)\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { identity } from \"ramda\"\nimport { Observable, OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  pluck,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchElementOffset } from \"browser\"\nimport { SearchResult } from \"integrations/search\"\nimport {\n  SearchMessage,\n  isSearchResultMessage\n} from \"workers\"\n\nimport { SearchQuery } from \"../../query\"\nimport { applySearchResult } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search result from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchResult(\n  { rx$ }: WorkerHandler<SearchMessage>, { query$ }: MountOptions\n): OperatorFunction<HTMLElement, SearchResult[]> {\n  return pipe(\n    switchMap(el => {\n      const container = el.parentElement!\n\n      /* Compute whether there are more search results to fetch */\n      const fetch$ = watchElementOffset(container)\n        .pipe(\n          map(({ y }) => {\n            return y >= container.scrollHeight - container.offsetHeight - 16\n          }),\n          distinctUntilChanged(),\n          filter(identity)\n        )\n\n      /* Apply search results */\n      return rx$\n        .pipe(\n          filter(isSearchResultMessage),\n          pluck(\"data\"),\n          applySearchResult(el, { query$, fetch$ })\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  shareReplay,\n  startWith,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  getElement,\n  watchViewportAt\n} from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport {\n  applyHeaderType,\n  watchHeader\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Header type\n */\nexport type HeaderType =\n  | \"site\"                             /* Header shows site title */\n  | \"page\"                             /* Header shows page title */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Header\n */\nexport interface Header {\n  type: HeaderType                     /* Header type */\n  sticky: boolean                      /* Header stickyness */\n  height: number                       /* Header visible height */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount header from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountHeader(\n  { viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Header> {\n  return pipe(\n    switchMap(el => {\n      const header$ = watchHeader(el, { viewport$ })\n\n      /* Compute whether the header should switch to page header */\n      const type$ = useComponent(\"main\")\n        .pipe(\n          map(main => getElement(\"h1, h2, h3, h4, h5, h6\", main)!),\n          filter(hx => typeof hx !== \"undefined\"),\n          withLatestFrom(useComponent(\"header-title\")),\n          switchMap(([hx, title]) => watchViewportAt(hx, { header$, viewport$ })\n            .pipe(\n              map(({ offset: { y } }) => {\n                return y >= hx.offsetHeight ? \"page\" : \"site\"\n              }),\n              distinctUntilChanged(),\n              applyHeaderType(title)\n            )\n          ),\n          startWith<HeaderType>(\"site\")\n        )\n\n      /* Combine into single observable */\n      return combineLatest([header$, type$])\n        .pipe(\n          map(([header, type]): Header => ({ type, ...header })),\n          shareReplay(1)\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  of,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  finalize,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header, HeaderType } from \"../_\"\nimport {\n  resetHeaderTitleActive,\n  setHeaderTitleActive\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch header\n *\n * The header is wrapped in an observable to pave the way for auto-hiding or\n * other dynamic behaviors that may be implemented later on.\n *\n * @param el - Header element\n * @param options - Options\n *\n * @return Header observable\n */\nexport function watchHeader(\n  el: HTMLElement, { viewport$ }: WatchOptions\n): Observable<Omit<Header, \"type\">> {\n  return viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\"),\n      switchMap(() => {\n        const styles = getComputedStyle(el)\n        const sticky = [\n          \"sticky\",                    /* Modern browsers */\n          \"-webkit-sticky\"             /* Old Safari */\n        ].includes(styles.position)\n        return of({\n          sticky,\n          height: sticky ? el.offsetHeight : 0\n        })\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header title type\n *\n * @param el - Header title element\n *\n * @return Operator function\n */\nexport function applyHeaderType(\n  el: HTMLElement\n): MonoTypeOperatorFunction<HeaderType> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(type => {\n      setHeaderTitleActive(el, type === \"page\")\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderTitleActive(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header title active\n *\n * @param el - Header title element\n * @param value - Whether the title is shown\n */\nexport function setHeaderTitleActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"active\" : \"\")\n}\n\n/**\n * Reset header title active\n *\n * @param el - Header title element\n */\nexport function resetHeaderTitleActive(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, pipe } from \"rxjs\"\nimport { distinctUntilChanged, map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, watchViewportAt } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { applyHero } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Hero\n */\nexport interface Hero {\n  hidden: boolean                      /* Whether the hero is hidden */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount hero from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountHero(\n  { header$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Hero> {\n  return pipe(\n    switchMap(el => watchViewportAt(el, { header$, viewport$ })\n      .pipe(\n        map(({ offset: { y } }) => ({ hidden: y >= 20 })),\n        distinctUntilChanged(),\n        applyHero(el)\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport { finalize, observeOn, tap } from \"rxjs/operators\"\n\nimport { Hero } from \"../_\"\nimport {\n  resetHeroHidden,\n  setHeroHidden\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply hero\n *\n * @param el - Hero element\n *\n * @return Operator function\n */\nexport function applyHero(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Hero> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ hidden }) => {\n      setHeroHidden(el, hidden)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeroHidden(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set hero hidden\n *\n * @param el - Hero element\n * @param value - Whether the element is hidden\n */\nexport function setHeroHidden(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"hidden\" : \"\")\n}\n\n/**\n * Reset hero hidden\n *\n * @param el - Hero element\n */\nexport function resetHeroHidden(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, Subject, pipe } from \"rxjs\"\nimport { distinctUntilKeyChanged, switchMap, tap } from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport { Header } from \"../../header\"\nimport {\n  applyHeaderShadow,\n  watchMain\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Main area\n */\nexport interface Main {\n  offset: number                       /* Main area top offset */\n  height: number                       /* Main area visible height */\n  active: boolean                      /* Scrolled past top offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount main area from source observable\n *\n * The header must be connected to the main area observable outside of the\n * operator function, as the header will persist in-between document switches\n * while the main area is replaced. However, the header observable must be\n * passed to this function, so we connect both via a long-living subject.\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountMain(\n  { header$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Main> {\n  const main$ = new Subject<Main>()\n\n  /* Connect to main area observable via long-living subject */\n  useComponent(\"header\")\n    .pipe(\n      switchMap(header => main$\n        .pipe(\n          distinctUntilKeyChanged(\"active\"),\n          applyHeaderShadow(header)\n        )\n      )\n    )\n      .subscribe()\n\n  /* Return operator */\n  return pipe(\n    switchMap(el => watchMain(el, { header$, viewport$ })),\n    tap(main => main$.next(main))\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  finalize,\n  map,\n  observeOn,\n  pluck,\n  shareReplay,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, watchElementSize } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../_\"\nimport {\n  resetHeaderShadow,\n  setHeaderShadow\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch main area\n *\n * This function returns an observable that computes the visual parameters of\n * the main area which depends on the viewport vertical offset and height, as\n * well as the height of the header element, if the header is fixed.\n *\n * @param el - Main area element\n * @param options - Options\n *\n * @return Main area observable\n */\nexport function watchMain(\n  el: HTMLElement, { header$, viewport$ }: WatchOptions\n): Observable<Main> {\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      pluck(\"height\")\n    )\n\n  /* Compute the main area's top and bottom markers */\n  const marker$ = watchElementSize(el)\n    .pipe(\n      map(({ height }) => [\n        el.offsetTop,\n        el.offsetTop + height\n      ]),\n      distinctUntilChanged(),\n      shareReplay(1)\n    )\n\n  /* Compute the main area's visible height */\n  const height$ = combineLatest([adjust$, marker$, viewport$])\n    .pipe(\n      map(([header, [top, bottom], { offset: { y }, size: { height } }]) => {\n        return height\n          - Math.max(0, top    - y,  header)\n          - Math.max(0, height + y - bottom)\n      }),\n      map(height => Math.max(0, height)),\n      distinctUntilChanged()\n    )\n\n  /* Compute whether the viewport offset is past the main area's top */\n  const active$ = combineLatest([adjust$, marker$, viewport$])\n    .pipe(\n      map(([header, [top], { offset: { y } }]) => y >= top - header),\n      distinctUntilChanged()\n    )\n\n  /* Combine into a single observable */\n  return combineLatest([adjust$, marker$, height$, active$])\n    .pipe(\n      map(([header, [top], height, active]) => ({\n        offset: top - header,\n        height,\n        active\n      }))\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header shadow\n *\n * @param el - Header element\n *\n * @return Operator function\n */\nexport function applyHeaderShadow(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Main> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ active }) => {\n      setHeaderShadow(el, active)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderShadow(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header shadow\n *\n * @param el - Header element\n * @param value - Whether the shadow is shown\n */\nexport function setHeaderShadow(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"shadow\" : \"\")\n}\n\n/**\n * Reset header shadow\n *\n * @param el - Header element\n */\nexport function resetHeaderShadow(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, of, pipe } from \"rxjs\"\nimport { distinctUntilChanged, map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, watchViewportAt } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { applyTabs } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Tabs\n */\nexport interface Tabs {\n  hidden: boolean                      /* Whether the tabs are hidden */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Media screen observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount tabs from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTabs(\n  { header$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Tabs> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount tabs above screen breakpoint */\n          if (screen) {\n            return watchViewportAt(el, { header$, viewport$ })\n              .pipe(\n                map(({ offset: { y } }) => ({ hidden: y >= 10 })),\n                distinctUntilChanged(),\n                applyTabs(el)\n              )\n\n          /* [screen -]: Unmount tabs below screen breakpoint */\n          } else {\n            return of({ hidden: true })\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport { finalize, observeOn, tap } from \"rxjs/operators\"\n\nimport { Tabs } from \"../_\"\nimport {\n  resetTabsHidden,\n  setTabsHidden\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply tabs\n *\n * @param el - Tabs element\n *\n * @return Operator function\n */\nexport function applyTabs(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Tabs> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ hidden }) => {\n      setTabsHidden(el, hidden)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetTabsHidden(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set tabs hidden\n *\n * @param el - Tabs element\n * @param value - Whether the element is hidden\n */\nexport function setTabsHidden(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"hidden\" : \"\")\n}\n\n/**\n * Reset tabs hidden\n *\n * @param el - Tabs element\n */\nexport function resetTabsHidden(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, fromEvent, iif, merge } from \"rxjs\"\nimport { map, mapTo, shareReplay, switchMap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether the given device is an Apple device\n *\n * @return Test result\n */\nfunction isAppleDevice(): boolean {\n  return /(iPad|iPhone|iPod)/.test(navigator.userAgent)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all elements with `data-md-scrollfix` attributes\n *\n * This is a year-old patch which ensures that overflow scrolling works at the\n * top and bottom of containers on iOS by ensuring a `1px` scroll offset upon\n * the start of a touch event.\n *\n * @see https://bit.ly/2SCtAOO - Original source\n *\n * @param options - Options\n */\nexport function patchScrollfix(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements(\"[data-md-scrollfix]\")),\n      shareReplay(1)\n    )\n\n  /* Remove marker attribute, so we'll only add the fix once */\n  els$.subscribe(els => {\n    for (const el of els)\n      el.removeAttribute(\"data-md-scrollfix\")\n  })\n\n  /* Patch overflow scrolling on touch start */\n  iif(isAppleDevice, els$, NEVER)\n    .pipe(\n      switchMap(els => merge(...els.map(el => (\n        fromEvent(el, \"touchstart\")\n          .pipe(\n            mapTo(el)\n          )\n      ))))\n    )\n      .subscribe(el => {\n        const top = el.scrollTop\n\n        /* We're at the top of the container */\n        if (top === 0) {\n          el.scrollTop = 1\n\n        /* We're at the bottom of the container */\n        } else if (top + el.offsetHeight === el.scrollHeight) {\n          el.scrollTop = top - 1\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable } from \"rxjs\"\nimport { catchError, map, switchMap } from \"rxjs/operators\"\n\nimport { getElementOrThrow, getElements } from \"browser\"\nimport { renderSource } from \"templates\"\nimport { cache, hash } from \"utilities\"\n\nimport { fetchSourceFactsFromGitHub } from \"./github\"\nimport { fetchSourceFactsFromGitLab } from \"./gitlab\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Source facts\n */\nexport type SourceFacts = string[]\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch source facts\n *\n * @param url - Source repository URL\n *\n * @return Source facts observable\n */\nfunction fetchSourceFacts(\n  url: string\n): Observable<SourceFacts> {\n  const [type] = url.match(/(git(?:hub|lab))/i) || []\n  switch (type.toLowerCase()) {\n\n    /* GitHub repository */\n    case \"github\":\n      const [, user, repo] = url.match(/^.+github\\.com\\/([^\\/]+)\\/?([^\\/]+)/i)\n      return fetchSourceFactsFromGitHub(user, repo)\n\n    /* GitLab repository */\n    case \"gitlab\":\n      const [, base, project] = url.match(/^.+?([^\\/]*gitlab[^\\/]+)\\/(.+)/i)\n      return fetchSourceFactsFromGitLab(base, project)\n\n    /* Everything else */\n    default:\n      return NEVER\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch elements containing repository information\n *\n * This function will retrieve the URL from the repository link and try to\n * query data from integrated source code platforms like GitHub or GitLab.\n *\n * @param options - Options\n */\nexport function patchSource(\n  { document$ }: PatchOptions\n): void {\n  document$\n    .pipe(\n      map(() => getElementOrThrow<HTMLAnchorElement>(\".md-source[href]\")),\n      switchMap(({ href }) => (\n        cache(`${hash(href)}`, () => fetchSourceFacts(href))\n      )),\n      catchError(() => NEVER)\n    )\n      .subscribe(facts => {\n        for (const el of getElements(\".md-source__repository\")) {\n          if (!el.hasAttribute(\"data-md-state\")) {\n            el.setAttribute(\"data-md-state\", \"done\")\n            el.appendChild(renderSource(facts))\n          }\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Repo, User } from \"github-types\"\nimport { Observable, of } from \"rxjs\"\nimport { ajax } from \"rxjs/ajax\"\nimport { filter, pluck, switchMap } from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitHub source facts\n *\n * @param user - GitHub user\n * @param repo - GitHub repository\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitHub(\n  user: string, repo?: string\n): Observable<SourceFacts> {\n  return ajax({\n    url: typeof repo !== \"undefined\"\n      ? `https://api.github.com/repos/${user}/${repo}`\n      : `https://api.github.com/users/${user}`,\n    responseType: \"json\"\n  })\n    .pipe(\n      filter(({ status }) => status === 200),\n      pluck(\"response\"),\n      switchMap(data => {\n\n        /* GitHub repository */\n        if (typeof repo !== \"undefined\") {\n          const { stargazers_count, forks_count }: Repo = data\n          return of([\n            `${round(stargazers_count || 0)} Stars`,\n            `${round(forks_count || 0)} Forks`\n          ])\n\n        /* GitHub user/organization */\n        } else {\n          const { public_repos }: User = data\n          return of([\n            `${round(public_repos || 0)} Repositories`\n          ])\n        }\n      })\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { ProjectSchema } from \"gitlab\"\nimport { Observable } from \"rxjs\"\nimport { ajax } from \"rxjs/ajax\"\nimport { filter, map, pluck } from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitLab source facts\n *\n * @param base - GitLab base\n * @param project - GitLab project\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitLab(\n  base: string, project: string\n): Observable<SourceFacts> {\n  return ajax({\n    url: `https://${base}/api/v4/projects/${encodeURIComponent(project)}`,\n    responseType: \"json\"\n  })\n    .pipe(\n      filter(({ status }) => status === 200),\n      pluck(\"response\"),\n      map(({ star_count, forks_count }: ProjectSchema) => ([\n        `${round(star_count)} Stars`,\n        `${round(forks_count)} Forks`\n      ]))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// TODO: remove this after we finished refactoring\n// tslint:disable\n\nimport \"../stylesheets/main.scss\"\nimport \"../stylesheets/palette.scss\"\n\nimport { values } from \"ramda\"\nimport {\n  merge,\n  combineLatest,\n  animationFrameScheduler,\n  fromEvent,\n  of,\n  NEVER\n} from \"rxjs\"\nimport {\n  delay,\n  switchMap,\n  tap,\n  filter,\n  withLatestFrom,\n  observeOn,\n  take,\n  shareReplay,\n  share\n} from \"rxjs/operators\"\n\nimport {\n  watchToggle,\n  setToggle,\n  getElements,\n  watchMedia,\n  watchDocument,\n  watchLocation,\n  watchLocationHash,\n  watchViewport,\n  isLocationInternal,\n  isLocationAnchor,\n  setLocationHash\n} from \"./browser\"\nimport { setupSearchWorker } from \"./workers\"\n\nimport {\n  mountHeader,\n  mountHero,\n  mountMain,\n  mountNavigation,\n  mountSearch,\n  mountTableOfContents,\n  mountTabs,\n  useComponent,\n  setupComponents,\n  mountSearchQuery,\n  mountSearchReset,\n  mountSearchResult\n} from \"components\"\nimport { setupClipboard } from \"./integrations/clipboard\"\nimport { setupDialog } from \"integrations/dialog\"\nimport { setupKeyboard } from \"./integrations/keyboard\"\nimport { setupInstantLoading } from \"integrations/instant\"\nimport {\n  patchTables,\n  patchDetails,\n  patchScrollfix,\n  patchSource,\n  patchScripts\n} from \"patches\"\nimport { isConfig } from \"utilities\"\n\n/* ------------------------------------------------------------------------- */\n\ndocument.documentElement.classList.remove(\"no-js\")\ndocument.documentElement.classList.add(\"js\")\n\n/* Test for iOS */\nif (navigator.userAgent.match(/(iPad|iPhone|iPod)/g))\n  document.documentElement.classList.add(\"ios\")\n\n/**\n * Set scroll lock\n *\n * @param el - Scrollable element\n * @param value - Vertical offset\n */\nexport function setScrollLock(\n  el: HTMLElement, value: number\n): void {\n  el.setAttribute(\"data-md-state\", \"lock\")\n  el.style.top = `-${value}px`\n}\n\n/**\n * Reset scroll lock\n *\n * @param el - Scrollable element\n */\nexport function resetScrollLock(\n  el: HTMLElement\n): void {\n  const value = -1 * parseInt(el.style.top, 10)\n  el.removeAttribute(\"data-md-state\")\n  el.style.top = \"\"\n  if (value)\n    window.scrollTo(0, value)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Initialize Material for MkDocs\n *\n * @param config - Configuration\n */\nexport function initialize(config: unknown) {\n  if (!isConfig(config))\n    throw new SyntaxError(`Invalid configuration: ${JSON.stringify(config)}`)\n\n  /* Setup user interface observables */\n  const location$ = watchLocation()\n  const hash$     = watchLocationHash()\n  const viewport$ = watchViewport()\n  const tablet$   = watchMedia(\"(min-width: 960px)\")\n  const screen$   = watchMedia(\"(min-width: 1220px)\")\n\n  /* Setup document observable */\n  const document$ = config.features.includes(\"instant\")\n    ? watchDocument({ location$ })\n    : watchDocument()\n\n  /* Setup component bindings */\n  setupComponents([\n    \"container\",                       /* Container */\n    \"header\",                          /* Header */\n    \"header-title\",                    /* Header title */\n    \"hero\",                            /* Hero */\n    \"main\",                            /* Main area */\n    \"navigation\",                      /* Navigation */\n    \"search\",                          /* Search */\n    \"search-query\",                    /* Search input */\n    \"search-reset\",                    /* Search reset */\n    \"search-result\",                   /* Search results */\n    \"skip\",                            /* Skip link */\n    \"tabs\",                            /* Tabs */\n    \"toc\"                              /* Table of contents */\n  ], { document$ })\n\n  /* ----------------------------------------------------------------------- */\n\n  // External index\n  const index = config.search && config.search.index\n    ? config.search.index\n    : undefined\n\n  // TODO: pass URL config as first parameter, options as second\n  const worker = setupSearchWorker(config.url.worker.search, {\n    base: config.url.base, index, location$\n  })\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Create header observable */\n  const header$ = useComponent(\"header\")\n    .pipe(\n      mountHeader({ viewport$ }),\n      shareReplay(1)\n    )\n\n  const main$ = useComponent(\"main\")\n    .pipe(\n      mountMain({ header$, viewport$ }),\n      shareReplay(1)\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Mount search query */\n  const query$ = useComponent(\"search-query\")\n    .pipe(\n      mountSearchQuery(worker),\n      shareReplay(1)\n    )\n\n  /* Mount search reset */\n  const reset$ = useComponent(\"search-reset\")\n    .pipe(\n      mountSearchReset(),\n      shareReplay(1)\n    )\n\n  /* Mount search result */\n  const result$ = useComponent(\"search-result\")\n    .pipe(\n      mountSearchResult(worker, { query$ }),\n      shareReplay(1)\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  const search$ = useComponent(\"search\")\n    .pipe(\n      mountSearch({ query$, reset$, result$ }),\n      shareReplay(1)\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  const navigation$ = useComponent(\"navigation\")\n    .pipe(\n      mountNavigation({ header$, main$, viewport$, screen$ }),\n      shareReplay(1) // shareReplay because there might be late subscribers\n    )\n\n  const toc$ = useComponent(\"toc\")\n    .pipe(\n      mountTableOfContents({ header$, main$, viewport$, tablet$ }),\n      shareReplay(1)\n    )\n\n  const tabs$ = useComponent(\"tabs\")\n    .pipe(\n      mountTabs({ header$, viewport$, screen$ }),\n      shareReplay(1)\n    )\n\n  const hero$ = useComponent(\"hero\")\n    .pipe(\n      mountHero({ header$, viewport$ }),\n      shareReplay(1)\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  const keyboard$ = setupKeyboard()\n\n  patchDetails({ document$, hash$ })\n  patchScripts({ document$ })\n  patchSource({ document$ })\n  patchTables({ document$ })\n\n  /* Force 1px scroll offset to trigger overflow scrolling */\n  patchScrollfix({ document$ })\n\n  /* Setup clipboard and dialog */\n  const dialog$ = setupDialog()\n  const clipboard$ = setupClipboard({ document$, dialog$ })\n\n  /* ----------------------------------------------------------------------- */\n\n  // // put into search...\n  hash$\n    .pipe(\n      tap(() => setToggle(\"search\", false)),\n      delay(125), // ensure that it runs after the body scroll reset...\n    )\n      .subscribe(hash => setLocationHash(`#${hash}`)) // TODO: must be unified\n\n  // Scroll lock // document -> document$ => { body } !?\n  // put into search...\n  combineLatest([\n    watchToggle(\"search\"),\n    tablet$,\n  ])\n    .pipe(\n      withLatestFrom(viewport$),\n      switchMap(([[toggle, tablet], { offset: { y }}]) => {\n        const active = toggle && !tablet\n        return document$\n          .pipe(\n            delay(active ? 400 : 100), // TOOD: directly combine this with the hash!\n            observeOn(animationFrameScheduler),\n            tap(({ body }) => active\n              ? setScrollLock(body, y)\n              : resetScrollLock(body)\n            )\n          )\n      })\n    )\n      .subscribe()\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Intercept internal link clicks */\n  const link$ = fromEvent<MouseEvent>(document.body, \"click\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      switchMap(ev => {\n        if (ev.target instanceof HTMLElement) {\n          const el = ev.target.closest(\"a\") // TODO: abstract as link click?\n          if (el && isLocationInternal(el)) {\n            if (!isLocationAnchor(el) && config.features.includes(\"instant\"))\n              ev.preventDefault()\n            return of(el)\n          }\n        }\n        return NEVER\n      }),\n      share()\n    )\n\n  /* Always close drawer on click */\n  link$.subscribe(() => {\n    setToggle(\"drawer\", false)\n  })\n\n  // somehow call this setupNavigation ?\n\n  // instant loading\n  if (config.features.includes(\"instant\")) {\n\n    /* Disable automatic scroll restoration, as it doesn't work nicely */\n    if (\"scrollRestoration\" in history)\n      history.scrollRestoration = \"manual\"\n\n    /* Resolve relative links for stability */\n    for (const selector of [\n      `link[rel=\"shortcut icon\"]`,\n      // `link[rel=\"stylesheet\"]` // reduce style computations\n    ])\n      for (const el of getElements<HTMLLinkElement>(selector))\n        el.href = el.href\n\n    setupInstantLoading({\n      document$, link$, location$, viewport$\n    })\n\n  }\n\n  /* ----------------------------------------------------------------------- */\n\n  // if we use a single tab outside of search, unhide all permalinks.\n  // TODO: experimental. necessary!?\n  keyboard$\n    .pipe(\n      filter(key => key.mode === \"global\" && [\"Tab\"].includes(key.type)),\n      take(1)\n    )\n    .subscribe(() => {\n      for (const link of getElements(\".headerlink\"))\n        link.style.visibility = \"visible\"\n    })\n\n  /* ----------------------------------------------------------------------- */\n\n  const state = {\n\n    /* Browser observables */\n    document$,\n    viewport$,\n\n    /* Component observables */\n    header$,\n    hero$,\n    main$,\n    navigation$,\n    search$,\n    tabs$,\n    toc$,\n\n    /* Integation observables */\n    clipboard$,\n    keyboard$,\n    dialog$\n  }\n\n  /* Subscribe to all observables */\n  merge(...values(state))\n    .subscribe()\n  return state\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport {\n  filter,\n  map,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  Key,\n  getActiveElement,\n  getElement,\n  getElements,\n  getToggle,\n  isSusceptibleToKeyboard,\n  setElementFocus,\n  setElementSelection,\n  setToggle,\n  watchKeyboard\n} from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Keyboard mode\n */\nexport type KeyboardMode =\n  | \"global\"                           /* Global */\n  | \"search\"                           /* Search is open */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Keyboard\n */\nexport interface Keyboard extends Key {\n  mode: KeyboardMode                   /* Keyboard mode */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup keyboard\n *\n * This function will setup the keyboard handlers and ensure that keys are\n * correctly propagated. Currently there are two modes:\n *\n * - `global`: This mode is active when the search is closed. It is intended\n *   to assign hotkeys to specific functions of the site. Currently the search,\n *   previous and next page can be triggered.\n *\n * - `search`: This mode is active when the search is open. It maps certain\n *   navigational keys to offer search results that can be entirely navigated\n *   through keyboard input.\n *\n * The keyboard observable is returned and can be used to monitor the keyboard\n * in order toassign further hotkeys to custom functions.\n *\n * @return Keyboard observable\n */\nexport function setupKeyboard(): Observable<Keyboard> {\n  const keyboard$ = watchKeyboard()\n    .pipe(\n      map<Key, Keyboard>(key => ({\n        mode: getToggle(\"search\") ? \"search\" : \"global\",\n        ...key\n      })),\n      share()\n    )\n\n  /* Setup search keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => mode === \"search\"),\n      withLatestFrom(\n        useComponent(\"search-query\"),\n        useComponent(\"search-result\")\n      )\n    )\n      .subscribe(([key, query, result]) => {\n        const active = getActiveElement()\n        switch (key.type) {\n\n          /* Enter: prevent form submission */\n          case \"Enter\":\n            if (active === query)\n              key.claim()\n            break\n\n          /* Escape or Tab: close search */\n          case \"Escape\":\n          case \"Tab\":\n            setToggle(\"search\", false)\n            setElementFocus(query, false)\n            break\n\n          /* Vertical arrows: select previous or next search result */\n          case \"ArrowUp\":\n          case \"ArrowDown\":\n            if (typeof active === \"undefined\") {\n              setElementFocus(query)\n            } else {\n              const els = [query, ...getElements(\"[href]\", result)]\n              const i = Math.max(0, (\n                Math.max(0, els.indexOf(active)) + els.length + (\n                  key.type === \"ArrowUp\" ? -1 : +1\n                )\n              ) % els.length)\n              setElementFocus(els[i])\n            }\n\n            /* Prevent scrolling of page */\n            key.claim()\n            break\n\n          /* All other keys: hand to search query */\n          default:\n            if (query !== getActiveElement())\n              setElementFocus(query)\n        }\n      })\n\n  /* Setup global keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => {\n        if (mode === \"global\") {\n          const active = getActiveElement()\n          if (typeof active !== \"undefined\")\n            return !isSusceptibleToKeyboard(active)\n        }\n        return false\n      }),\n      withLatestFrom(useComponent(\"search-query\"))\n    )\n      .subscribe(([key, query]) => {\n        switch (key.type) {\n\n          /* Open search and select query */\n          case \"f\":\n          case \"s\":\n            setElementFocus(query)\n            setElementSelection(query)\n            key.claim()\n            break\n\n          /* Go to previous page */\n          case \"p\":\n          case \",\":\n            const prev = getElement(\"[href][rel=prev]\")\n            if (typeof prev !== \"undefined\")\n              prev.click()\n            break\n\n          /* Go to next page */\n          case \"n\":\n          case \".\":\n            const next = getElement(\"[href][rel=next]\")\n            if (typeof next !== \"undefined\")\n              next.click()\n            break\n        }\n      })\n\n  /* Return keyboard */\n  return keyboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { identity } from \"ramda\"\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport {\n  filter,\n  map,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport {\n  getElement,\n  getElements,\n  watchMedia\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n  hash$: Observable<string>            /* Location hash observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `details` elements\n *\n * This function will ensure that all `details` tags are opened prior to\n * printing, so the whole content of the page is included, and on anchor jumps.\n *\n * @param options - Options\n */\nexport function patchDetails(\n  { document$, hash$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements<HTMLDetailsElement>(\"details\"))\n    )\n\n  /* Open all details before printing */\n  merge(\n    watchMedia(\"print\").pipe(filter(identity)), /* Webkit */\n    fromEvent(window, \"beforeprint\")            /* IE, FF */\n  )\n    .pipe(\n      switchMapTo(els$)\n    )\n      .subscribe(els => {\n        for (const el of els)\n          el.setAttribute(\"open\", \"\")\n      })\n\n  /* Open parent details and fix anchor jump */\n  hash$\n    .pipe(\n      map(id => getElement(`[id=\"${id}\"]`)!),\n      filter(el => typeof el !== \"undefined\"),\n      tap(el => {\n        const details = el.closest(\"details\")\n        if (details && !details.open)\n          details.setAttribute(\"open\", \"\")\n      })\n    )\n      .subscribe(el => el.scrollIntoView())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map, skip, withLatestFrom } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `script` elements\n *\n * This function must be run after a document switch, which means the first\n * emission must be ignored.\n *\n * @param options - Options\n */\nexport function patchScripts(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      skip(1),\n      withLatestFrom(useComponent(\"container\")),\n      map(([, el]) => getElements<HTMLScriptElement>(\"script\", el))\n    )\n\n  /* Evaluate all scripts via replacement */\n  els$.subscribe(els => {\n    for (const el of els) {\n      if (el.src || /(^|\\/javascript)$/i.test(el.type)) {\n        const script = document.createElement(\"script\")\n        const key = el.src ? \"src\" : \"textContent\"\n        script[key] = el[key]!\n        el.replaceWith(script)\n      }\n    }\n  })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\nimport { renderTable } from \"templates\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `table` elements\n *\n * This function will re-render all tables by wrapping them to improve overflow\n * scrolling on smaller screen sizes.\n *\n * @param options - Options\n */\nexport function patchTables(\n  { document$ }: MountOptions\n): void {\n  const sentinel = document.createElement(\"table\")\n  document$\n    .pipe(\n      map(() => getElements<HTMLTableElement>(\"table:not([class])\"))\n    )\n      .subscribe(els => {\n        for (const el of els) {\n          el.replaceWith(sentinel)\n          sentinel.replaceWith(renderTable(el))\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Subject, animationFrameScheduler, of } from \"rxjs\"\nimport {\n  delay,\n  map,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  duration?: number                    /* Display duration (default: 2s) */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup dialog\n *\n * @param options - Options\n *\n * @return Dialog observable\n */\nexport function setupDialog(\n  { duration }: SetupOptions = {}\n): Subject<string> {\n  const dialog$ = new Subject<string>()\n\n  /* Create dialog */\n  const dialog = document.createElement(\"div\")                                  // TODO: improve scoping\n  dialog.classList.add(\"md-dialog\", \"md-typeset\")\n\n  /* Display dialog */\n  dialog$\n    .pipe(\n      switchMap(text => of(document.body) // useComponent(\"container\")\n        .pipe(\n          map(container => container.appendChild(dialog)),\n          observeOn(animationFrameScheduler),\n          delay(1), // Strangley it doesnt work when we push things to the new animation frame...\n          tap(el => {\n            el.innerHTML = text\n            el.setAttribute(\"data-md-state\", \"open\")\n          }),\n          delay(duration || 2000),\n          tap(el => el.removeAttribute(\"data-md-state\")),\n          delay(400),\n          tap(el => {\n            el.innerHTML = \"\"\n            el.remove()\n          })\n        )\n      )\n    )\n      .subscribe()\n\n  /* Return dialog subject */\n  return dialog$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport * as ClipboardJS from \"clipboard\"\nimport { NEVER, Observable, Subject, fromEventPattern } from \"rxjs\"\nimport { mapTo, share, tap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\nimport { renderClipboard } from \"templates\"\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Observable<Document>      /* Document observable */\n  dialog$: Subject<string>             /* Dialog subject */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup clipboard\n *\n * This function implements the Clipboard.js integration and injects a button\n * into all code blocks when the document changes.\n *\n * @param options - Options\n *\n * @return Clipboard observable\n */\nexport function setupClipboard(\n  { document$, dialog$ }: SetupOptions\n): Observable<ClipboardJS.Event> {\n  if (!ClipboardJS.isSupported())\n    return NEVER\n\n  /* Inject 'copy-to-clipboard' buttons */\n  document$.subscribe(() => {\n    const blocks = getElements(\"pre > code\")\n    blocks.forEach((block, index) => {\n      const parent = block.parentElement!\n      parent.id = `__code_${index}`\n      parent.insertBefore(renderClipboard(parent.id), block)\n    })\n  })\n\n  /* Initialize and setup clipboard */\n  const clipboard$ = fromEventPattern<ClipboardJS.Event>(next => {\n    new ClipboardJS(\".md-clipboard\").on(\"success\", next)\n  })\n    .pipe(\n      share()\n    )\n\n  /* Display notification for clipboard event */\n  clipboard$\n    .pipe(\n      tap(ev => ev.clearSelection()),\n      mapTo(translate(\"clipboard.copied\"))\n    )\n      .subscribe(dialog$)\n\n  /* Return clipboard */\n  return clipboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, fromEvent, merge } from \"rxjs\"\nimport {\n  bufferCount,\n  debounceTime,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  filter,\n  map,\n  pluck,\n  sample,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  ViewportOffset,\n  getElement,\n  isLocationAnchor,\n  setLocationHash,\n  setViewportOffset\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * History state\n */\ninterface State {\n  url: URL                             /* State URL */\n  offset?: ViewportOffset              /* State viewport offset */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Observable<Document>      /* Document observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  link$: Observable<HTMLAnchorElement> /* Internal link observable */\n  location$: Subject<URL>              /* Location subject */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup instant loading\n *\n * @param options - Options\n *\n * @return TODO ?\n */\nexport function setupInstantLoading(\n  { document$, viewport$, link$, location$ }: SetupOptions\n) { // TODO: add return type\n  const state$ = link$\n    .pipe(\n      map(el => ({ url: new URL(el.href) })),\n      share<State>()\n    )\n\n  /* Intercept internal links to dispatch */\n  const push$ = state$\n    .pipe(\n      distinctUntilChanged((prev, next) => prev.url.href === next.url.href),\n      filter(({ url }) => !isLocationAnchor(url)),\n      share()\n    )\n\n  /* Intercept popstate events (history back and forward) */\n  const pop$ = fromEvent<PopStateEvent>(window, \"popstate\")\n    .pipe(\n      filter(ev => ev.state !== null),\n      map<PopStateEvent, State>(ev => ({\n        url: new URL(location.href),\n        offset: ev.state\n      })),\n      share()\n    )\n\n  /* Emit location change */\n  merge(push$, pop$)\n    .pipe(\n      pluck(\"url\")\n    )\n      .subscribe(location$)\n\n  /* History: debounce update of viewport offset */\n  viewport$\n    .pipe(\n      debounceTime(250),\n      distinctUntilKeyChanged(\"offset\")\n    )\n      .subscribe(({ offset }) => {\n        history.replaceState(offset, \"\")\n      })\n\n  /* Apply viewport offset from history */\n  merge(state$, pop$)\n    .pipe(\n      bufferCount(2, 1),\n      filter(([prev, next]) => {\n        return prev.url.pathname === next.url.pathname\n            && !isLocationAnchor(next.url)\n      }),\n      map(([, state]) => state)\n    )\n      .subscribe(({ offset }) => {\n        setViewportOffset(offset || { y: 0 })\n      })\n\n  /* Intercept actual instant loading */\n  const instant$ = merge(push$, pop$)\n    .pipe(\n      sample(document$)\n    )\n\n  // TODO: from here on, everything is beta.... ###############################\n\n  instant$.subscribe(({ url, offset }) => {\n    if (url.hash && !offset) {\n      // console.log(\"set hash!\")\n      setLocationHash(url.hash) // must delay, if search is open!\n    } else {\n      setViewportOffset(offset || { y: 0 })\n    }\n  })\n\n  instant$\n    .pipe(\n      withLatestFrom(document$)\n    )\n      .subscribe(([, { title, head }]) => {\n        document.dispatchEvent(new CustomEvent(\"DOMContentSwitch\"))\n        document.title = title\n\n        /* Replace meta tags */\n        for (const selector of [\n          `link[rel=\"canonical\"]`,\n          `meta[name=\"author\"]`,\n          `meta[name=\"description\"]`\n        ]) {\n          const next = getElement(selector, head)\n          const prev = getElement(selector, document.head)\n          if (\n            typeof next !== \"undefined\" &&\n            typeof prev !== \"undefined\"\n          ) {\n            prev.replaceWith(next)\n          }\n        }\n      })\n}\n"],"sourceRoot":""}