Simplify KaTeX loading, use minified versions

static/auto-render.js

@@ -1,339 +0,0 @@
-(function webpackUniversalModuleDefinition(root, factory) {
-	if(typeof exports === 'object' && typeof module === 'object')
-		module.exports = factory(require("katex"));
-	else if(typeof define === 'function' && define.amd)
-		define(["katex"], factory);
-	else if(typeof exports === 'object')
-		exports["renderMathInElement"] = factory(require("katex"));
-	else
-		root["renderMathInElement"] = factory(root["katex"]);
-})((typeof self !== 'undefined' ? self : this), function(__WEBPACK_EXTERNAL_MODULE__0__) {
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-/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
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-/******/ ([
-/* 0 */
-/***/ (function(module, exports) {
-
-module.exports = __WEBPACK_EXTERNAL_MODULE__0__;
-
-/***/ }),
-/* 1 */
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-__webpack_require__.r(__webpack_exports__);
-
-// EXTERNAL MODULE: external "katex"
-var external_katex_ = __webpack_require__(0);
-var external_katex_default = /*#__PURE__*/__webpack_require__.n(external_katex_);
-
-// CONCATENATED MODULE: ./contrib/auto-render/splitAtDelimiters.js
-/* eslint no-constant-condition:0 */
-var findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
-  // Adapted from
-  // https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
-  var index = startIndex;
-  var braceLevel = 0;
-  var delimLength = delimiter.length;
-
-  while (index < text.length) {
-    var character = text[index];
-
-    if (braceLevel <= 0 && text.slice(index, index + delimLength) === delimiter) {
-      return index;
-    } else if (character === "\\") {
-      index++;
-    } else if (character === "{") {
-      braceLevel++;
-    } else if (character === "}") {
-      braceLevel--;
-    }
-
-    index++;
-  }
-
-  return -1;
-};
-
-var splitAtDelimiters = function splitAtDelimiters(startData, leftDelim, rightDelim, display) {
-  var finalData = [];
-
-  for (var i = 0; i < startData.length; i++) {
-    if (startData[i].type === "text") {
-      var text = startData[i].data;
-      var lookingForLeft = true;
-      var currIndex = 0;
-      var nextIndex = void 0;
-      nextIndex = text.indexOf(leftDelim);
-
-      if (nextIndex !== -1) {
-        currIndex = nextIndex;
-        finalData.push({
-          type: "text",
-          data: text.slice(0, currIndex)
-        });
-        lookingForLeft = false;
-      }
-
-      while (true) {
-        if (lookingForLeft) {
-          nextIndex = text.indexOf(leftDelim, currIndex);
-
-          if (nextIndex === -1) {
-            break;
-          }
-
-          finalData.push({
-            type: "text",
-            data: text.slice(currIndex, nextIndex)
-          });
-          currIndex = nextIndex;
-        } else {
-          nextIndex = findEndOfMath(rightDelim, text, currIndex + leftDelim.length);
-
-          if (nextIndex === -1) {
-            break;
-          }
-
-          finalData.push({
-            type: "math",
-            data: text.slice(currIndex + leftDelim.length, nextIndex),
-            rawData: text.slice(currIndex, nextIndex + rightDelim.length),
-            display: display
-          });
-          currIndex = nextIndex + rightDelim.length;
-        }
-
-        lookingForLeft = !lookingForLeft;
-      }
-
-      finalData.push({
-        type: "text",
-        data: text.slice(currIndex)
-      });
-    } else {
-      finalData.push(startData[i]);
-    }
-  }
-
-  return finalData;
-};
-
-/* harmony default export */ var auto_render_splitAtDelimiters = (splitAtDelimiters);
-// CONCATENATED MODULE: ./contrib/auto-render/auto-render.js
-/* eslint no-console:0 */
-
-
-
-var auto_render_splitWithDelimiters = function splitWithDelimiters(text, delimiters) {
-  var data = [{
-    type: "text",
-    data: text
-  }];
-
-  for (var i = 0; i < delimiters.length; i++) {
-    var delimiter = delimiters[i];
-    data = auto_render_splitAtDelimiters(data, delimiter.left, delimiter.right, delimiter.display || false);
-  }
-
-  return data;
-};
-/* Note: optionsCopy is mutated by this method. If it is ever exposed in the
- * API, we should copy it before mutating.
- */
-
-
-var auto_render_renderMathInText = function renderMathInText(text, optionsCopy) {
-  var data = auto_render_splitWithDelimiters(text, optionsCopy.delimiters);
-  var fragment = document.createDocumentFragment();
-
-  for (var i = 0; i < data.length; i++) {
-    if (data[i].type === "text") {
-      fragment.appendChild(document.createTextNode(data[i].data));
-    } else {
-      var span = document.createElement("span");
-      var math = data[i].data; // Override any display mode defined in the settings with that
-      // defined by the text itself
-
-      optionsCopy.displayMode = data[i].display;
-
-      try {
-        if (optionsCopy.preProcess) {
-          math = optionsCopy.preProcess(math);
-        }
-
-        external_katex_default.a.render(math, span, optionsCopy);
-      } catch (e) {
-        if (!(e instanceof external_katex_default.a.ParseError)) {
-          throw e;
-        }
-
-        optionsCopy.errorCallback("KaTeX auto-render: Failed to parse `" + data[i].data + "` with ", e);
-        fragment.appendChild(document.createTextNode(data[i].rawData));
-        continue;
-      }
-
-      fragment.appendChild(span);
-    }
-  }
-
-  return fragment;
-};
-
-var renderElem = function renderElem(elem, optionsCopy) {
-  for (var i = 0; i < elem.childNodes.length; i++) {
-    var childNode = elem.childNodes[i];
-
-    if (childNode.nodeType === 3) {
-      // Text node
-      var frag = auto_render_renderMathInText(childNode.textContent, optionsCopy);
-      i += frag.childNodes.length - 1;
-      elem.replaceChild(frag, childNode);
-    } else if (childNode.nodeType === 1) {
-      (function () {
-        // Element node
-        var className = ' ' + childNode.className + ' ';
-        var shouldRender = optionsCopy.ignoredTags.indexOf(childNode.nodeName.toLowerCase()) === -1 && optionsCopy.ignoredClasses.every(function (x) {
-          return className.indexOf(' ' + x + ' ') === -1;
-        });
-
-        if (shouldRender) {
-          renderElem(childNode, optionsCopy);
-        }
-      })();
-    } // Otherwise, it's something else, and ignore it.
-
-  }
-};
-
-var renderMathInElement = function renderMathInElement(elem, options) {
-  if (!elem) {
-    throw new Error("No element provided to render");
-  }
-
-  var optionsCopy = {}; // Object.assign(optionsCopy, option)
-
-  for (var option in options) {
-    if (options.hasOwnProperty(option)) {
-      optionsCopy[option] = options[option];
-    }
-  } // default options
-
-
-  optionsCopy.delimiters = optionsCopy.delimiters || [{
-    left: "$$",
-    right: "$$",
-    display: true
-  }, {
-    left: "\\(",
-    right: "\\)",
-    display: false
-  }, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
-  // {left: "$", right: "$", display: false},
-  //  \[…\] must come last in this array. Otherwise, renderMathInElement
-  //  will search for \[ before it searches for $$ or  \(
-  // That makes it susceptible to finding a \\[0.3em] row delimiter and
-  // treating it as if it were the start of a KaTeX math zone.
-  {
-    left: "\\[",
-    right: "\\]",
-    display: true
-  }];
-  optionsCopy.ignoredTags = optionsCopy.ignoredTags || ["script", "noscript", "style", "textarea", "pre", "code"];
-  optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
-  optionsCopy.errorCallback = optionsCopy.errorCallback || console.error; // Enable sharing of global macros defined via `\gdef` between different
-  // math elements within a single call to `renderMathInElement`.
-
-  optionsCopy.macros = optionsCopy.macros || {};
-  renderElem(elem, optionsCopy);
-};
-
-/* harmony default export */ var auto_render = __webpack_exports__["default"] = (renderMathInElement);
-
-/***/ })
-/******/ ])["default"];
-});

static/auto-render.min.js

@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("katex")):"function"==typeof define&&define.amd?define(["katex"],t):"object"==typeof exports?exports.renderMathInElement=t(require("katex")):e.renderMathInElement=t(e.katex)}("undefined"!=typeof self?self:this,(function(e){return function(){"use strict";var t={771:function(t){t.exports=e}},n={};function r(e){var o=n[e];if(void 0!==o)return o.exports;var i=n[e]={exports:{}};return t[e](i,i.exports,r),i.exports}r.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return r.d(t,{a:t}),t},r.d=function(e,t){for(var n in t)r.o(t,n)&&!r.o(e,n)&&Object.defineProperty(e,n,{enumerable:!0,get:t[n]})},r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)};var o={};return function(){r.d(o,{default:function(){return d}});var e=r(771),t=r.n(e);const n=function(e,t,n){let r=n,o=0;const i=e.length;for(;r<t.length;){const n=t[r];if(o<=0&&t.slice(r,r+i)===e)return r;"\\"===n?r++:"{"===n?o++:"}"===n&&o--,r++}return-1},i=/^\\begin{/;var a=function(e,t){let r;const o=[],a=new RegExp("("+t.map((e=>e.left.replace(/[-/\\^$*+?.()|[\]{}]/g,"\\$&"))).join("|")+")");for(;r=e.search(a),-1!==r;){r>0&&(o.push({type:"text",data:e.slice(0,r)}),e=e.slice(r));const a=t.findIndex((t=>e.startsWith(t.left)));if(r=n(t[a].right,e,t[a].left.length),-1===r)break;const l=e.slice(0,r+t[a].right.length),s=i.test(l)?l:e.slice(t[a].left.length,r);o.push({type:"math",data:s,rawData:l,display:t[a].display}),e=e.slice(r+t[a].right.length)}return""!==e&&o.push({type:"text",data:e}),o};const l=function(e,n){const r=a(e,n.delimiters);if(1===r.length&&"text"===r[0].type)return null;const o=document.createDocumentFragment();for(let e=0;e<r.length;e++)if("text"===r[e].type)o.appendChild(document.createTextNode(r[e].data));else{const i=document.createElement("span");let a=r[e].data;n.displayMode=r[e].display;try{n.preProcess&&(a=n.preProcess(a)),t().render(a,i,n)}catch(i){if(!(i instanceof t().ParseError))throw i;n.errorCallback("KaTeX auto-render: Failed to parse `"+r[e].data+"` with ",i),o.appendChild(document.createTextNode(r[e].rawData));continue}o.appendChild(i)}return o},s=function(e,t){for(let n=0;n<e.childNodes.length;n++){const r=e.childNodes[n];if(3===r.nodeType){let o=r.textContent,i=r.nextSibling,a=0;for(;i&&i.nodeType===Node.TEXT_NODE;)o+=i.textContent,i=i.nextSibling,a++;const s=l(o,t);if(s){for(let e=0;e<a;e++)r.nextSibling.remove();n+=s.childNodes.length-1,e.replaceChild(s,r)}else n+=a}else if(1===r.nodeType){const e=" "+r.className+" ";-1===t.ignoredTags.indexOf(r.nodeName.toLowerCase())&&t.ignoredClasses.every((t=>-1===e.indexOf(" "+t+" ")))&&s(r,t)}}};var d=function(e,t){if(!e)throw new Error("No element provided to render");const n={};for(const e in t)t.hasOwnProperty(e)&&(n[e]=t[e]);n.delimiters=n.delimiters||[{left:"$$",right:"$$",display:!0},{left:"\\(",right:"\\)",display:!1},{left:"\\begin{equation}",right:"\\end{equation}",display:!0},{left:"\\begin{align}",right:"\\end{align}",display:!0},{left:"\\begin{alignat}",right:"\\end{alignat}",display:!0},{left:"\\begin{gather}",right:"\\end{gather}",display:!0},{left:"\\begin{CD}",right:"\\end{CD}",display:!0},{left:"\\[",right:"\\]",display:!0}],n.ignoredTags=n.ignoredTags||["script","noscript","style","textarea","pre","code","option"],n.ignoredClasses=n.ignoredClasses||[],n.errorCallback=n.errorCallback||console.error,n.macros=n.macros||{},s(e,n)}}(),o=o.default}()}));

static/count.js

@@ -0,0 +1,271 @@
+// GoatCounter: https://www.goatcounter.com
+// This file is released under the ISC license: https://opensource.org/licenses/ISC
+;(function() {
+	'use strict';
+
+	if (window.goatcounter && window.goatcounter.vars)  // Compatibility with very old version; do not use.
+		window.goatcounter = window.goatcounter.vars
+	else
+		window.goatcounter = window.goatcounter || {}
+
+	// Load settings from data-goatcounter-settings.
+	var s = document.querySelector('script[data-goatcounter]')
+	if (s && s.dataset.goatcounterSettings) {
+		try         { var set = JSON.parse(s.dataset.goatcounterSettings) }
+		catch (err) { console.error('invalid JSON in data-goatcounter-settings: ' + err) }
+		for (var k in set)
+			if (['no_onload', 'no_events', 'allow_local', 'allow_frame', 'path', 'title', 'referrer', 'event'].indexOf(k) > -1)
+				window.goatcounter[k] = set[k]
+	}
+
+	var enc = encodeURIComponent
+
+	// Get all data we're going to send off to the counter endpoint.
+	var get_data = function(vars) {
+		var data = {
+			p: (vars.path     === undefined ? goatcounter.path     : vars.path),
+			r: (vars.referrer === undefined ? goatcounter.referrer : vars.referrer),
+			t: (vars.title    === undefined ? goatcounter.title    : vars.title),
+			e: !!(vars.event || goatcounter.event),
+			s: [window.screen.width, window.screen.height, (window.devicePixelRatio || 1)],
+			b: is_bot(),
+			q: location.search,
+		}
+
+		var rcb, pcb, tcb  // Save callbacks to apply later.
+		if (typeof(data.r) === 'function') rcb = data.r
+		if (typeof(data.t) === 'function') tcb = data.t
+		if (typeof(data.p) === 'function') pcb = data.p
+
+		if (is_empty(data.r)) data.r = document.referrer
+		if (is_empty(data.t)) data.t = document.title
+		if (is_empty(data.p)) data.p = get_path()
+
+		if (rcb) data.r = rcb(data.r)
+		if (tcb) data.t = tcb(data.t)
+		if (pcb) data.p = pcb(data.p)
+		return data
+	}
+
+	// Check if a value is "empty" for the purpose of get_data().
+	var is_empty = function(v) { return v === null || v === undefined || typeof(v) === 'function' }
+
+	// See if this looks like a bot; there is some additional filtering on the
+	// backend, but these properties can't be fetched from there.
+	var is_bot = function() {
+		// Headless browsers are probably a bot.
+		var w = window, d = document
+		if (w.callPhantom || w._phantom || w.phantom)
+			return 150
+		if (w.__nightmare)
+			return 151
+		if (d.__selenium_unwrapped || d.__webdriver_evaluate || d.__driver_evaluate)
+			return 152
+		if (navigator.webdriver)
+			return 153
+		return 0
+	}
+
+	// Object to urlencoded string, starting with a ?.
+	var urlencode = function(obj) {
+		var p = []
+		for (var k in obj)
+			if (obj[k] !== '' && obj[k] !== null && obj[k] !== undefined && obj[k] !== false)
+				p.push(enc(k) + '=' + enc(obj[k]))
+		return '?' + p.join('&')
+	}
+
+	// Show a warning in the console.
+	var warn = function(msg) {
+		if (console && 'warn' in console)
+			console.warn('goatcounter: ' + msg)
+	}
+
+	// Get the endpoint to send requests to.
+	var get_endpoint = function() {
+		var s = document.querySelector('script[data-goatcounter]')
+		if (s && s.dataset.goatcounter)
+			return s.dataset.goatcounter
+		return (goatcounter.endpoint || window.counter)  // counter is for compat; don't use.
+	}
+
+	// Get current path.
+	var get_path = function() {
+		var loc = location,
+			c = document.querySelector('link[rel="canonical"][href]')
+		if (c) {  // May be relative or point to different domain.
+			var a = document.createElement('a')
+			a.href = c.href
+			if (a.hostname.replace(/^www\./, '') === location.hostname.replace(/^www\./, ''))
+				loc = a
+		}
+		return (loc.pathname + loc.search) || '/'
+	}
+
+	// Run function after DOM is loaded.
+	var on_load = function(f) {
+		if (document.body === null)
+			document.addEventListener('DOMContentLoaded', function() { f() }, false)
+		else
+			f()
+	}
+
+	// Filter some requests that we (probably) don't want to count.
+	goatcounter.filter = function() {
+		if ('visibilityState' in document && document.visibilityState === 'prerender')
+			return 'visibilityState'
+		if (!goatcounter.allow_frame && location !== parent.location)
+			return 'frame'
+		if (!goatcounter.allow_local && location.hostname.match(/(localhost$|^127\.|^10\.|^172\.(1[6-9]|2[0-9]|3[0-1])\.|^192\.168\.|^0\.0\.0\.0$)/))
+			return 'localhost'
+		if (!goatcounter.allow_local && location.protocol === 'file:')
+			return 'localfile'
+		if (localStorage && localStorage.getItem('skipgc') === 't')
+			return 'disabled with #toggle-goatcounter'
+		return false
+	}
+
+	// Get URL to send to GoatCounter.
+	window.goatcounter.url = function(vars) {
+		var data = get_data(vars || {})
+		if (data.p === null)  // null from user callback.
+			return
+		data.rnd = Math.random().toString(36).substr(2, 5)  // Browsers don't always listen to Cache-Control.
+
+		var endpoint = get_endpoint()
+		if (!endpoint)
+			return warn('no endpoint found')
+
+		return endpoint + urlencode(data)
+	}
+
+	// Count a hit.
+	window.goatcounter.count = function(vars) {
+		var f = goatcounter.filter()
+		if (f)
+			return warn('not counting because of: ' + f)
+		var url = goatcounter.url(vars)
+		if (!url)
+			return warn('not counting because path callback returned null')
+
+		if (!navigator.sendBeacon(url)) {
+			// This mostly fails due to being blocked by CSP; try again with an
+			// image-based fallback.
+			var img = document.createElement('img')
+			img.src = url
+			img.style.position = 'absolute'  // Affect layout less.
+			img.style.bottom = '0px'
+			img.style.width = '1px'
+			img.style.height = '1px'
+			img.loading = 'eager'
+			img.setAttribute('alt', '')
+			img.setAttribute('aria-hidden', 'true')
+
+			var rm = function() { if (img && img.parentNode) img.parentNode.removeChild(img) }
+			img.addEventListener('load', rm, false)
+			document.body.appendChild(img)
+		}
+	}
+
+	// Get a query parameter.
+	window.goatcounter.get_query = function(name) {
+		var s = location.search.substr(1).split('&')
+		for (var i = 0; i < s.length; i++)
+			if (s[i].toLowerCase().indexOf(name.toLowerCase() + '=') === 0)
+				return s[i].substr(name.length + 1)
+	}
+
+	// Track click events.
+	window.goatcounter.bind_events = function() {
+		if (!document.querySelectorAll)  // Just in case someone uses an ancient browser.
+			return
+
+		var send = function(elem) {
+			return function() {
+				goatcounter.count({
+					event:    true,
+					path:     (elem.dataset.goatcounterClick || elem.name || elem.id || ''),
+					title:    (elem.dataset.goatcounterTitle || elem.title || (elem.innerHTML || '').substr(0, 200) || ''),
+					referrer: (elem.dataset.goatcounterReferrer || elem.dataset.goatcounterReferral || ''),
+				})
+			}
+		}
+
+		Array.prototype.slice.call(document.querySelectorAll("*[data-goatcounter-click]")).forEach(function(elem) {
+			if (elem.dataset.goatcounterBound)
+				return
+			var f = send(elem)
+			elem.addEventListener('click', f, false)
+			elem.addEventListener('auxclick', f, false)  // Middle click.
+			elem.dataset.goatcounterBound = 'true'
+		})
+	}
+
+	// Add a "visitor counter" frame or image.
+	window.goatcounter.visit_count = function(opt) {
+		on_load(function() {
+			opt        = opt        || {}
+			opt.type   = opt.type   || 'html'
+			opt.append = opt.append || 'body'
+			opt.path   = opt.path   || get_path()
+			opt.attr   = opt.attr   || {width: '200', height: (opt.no_branding ? '60' : '80')}
+
+			opt.attr['src'] = get_endpoint() + 'er/' + enc(opt.path) + '.' + enc(opt.type) + '?'
+			if (opt.no_branding) opt.attr['src'] += '&no_branding=1'
+			if (opt.style)       opt.attr['src'] += '&style=' + enc(opt.style)
+			if (opt.start)       opt.attr['src'] += '&start=' + enc(opt.start)
+			if (opt.end)         opt.attr['src'] += '&end='   + enc(opt.end)
+
+			var tag = {png: 'img', svg: 'img', html: 'iframe'}[opt.type]
+			if (!tag)
+				return warn('visit_count: unknown type: ' + opt.type)
+
+			if (opt.type === 'html') {
+				opt.attr['frameborder'] = '0'
+				opt.attr['scrolling']   = 'no'
+			}
+
+			var d = document.createElement(tag)
+			for (var k in opt.attr)
+				d.setAttribute(k, opt.attr[k])
+
+			var p = document.querySelector(opt.append)
+			if (!p)
+				return warn('visit_count: append not found: ' + opt.append)
+			p.appendChild(d)
+		})
+	}
+
+	// Make it easy to skip your own views.
+	if (location.hash === '#toggle-goatcounter') {
+		if (localStorage.getItem('skipgc') === 't') {
+			localStorage.removeItem('skipgc', 't')
+			alert('GoatCounter tracking is now ENABLED in this browser.')
+		}
+		else {
+			localStorage.setItem('skipgc', 't')
+			alert('GoatCounter tracking is now DISABLED in this browser until ' + location + ' is loaded again.')
+		}
+	}
+
+	if (!goatcounter.no_onload)
+		on_load(function() {
+			// 1. Page is visible, count request.
+			// 2. Page is not yet visible; wait until it switches to 'visible' and count.
+			// See #487
+			if (!('visibilityState' in document) || document.visibilityState === 'visible')
+				goatcounter.count()
+			else {
+				var f = function(e) {
+					if (document.visibilityState !== 'visible')
+						return
+					document.removeEventListener('visibilitychange', f)
+					goatcounter.count()
+				}
+				document.addEventListener('visibilitychange', f)
+			}
+
+			if (!goatcounter.no_events)
+				goatcounter.bind_events()
+		})
+})();