2a:null 2b:["$","title",null,{"children":"Dwitter Dweet De-Obfuscator | Friedrich Hartmann | Observable"}] 30:[] 2e:{"id":"7e5eeadc4cfdffb4","slug":"dwitter-dweet-de-obfuscator","title":"Dwitter Dweet De-Obfuscator","thumbnail":"58dcfc763d91639b20fea4a048b7aa2336291eed93884993f6fa4af8e555eaab","access_level":"public","create_time":"$D2019-07-04T23:28:32.031Z","update_time":"$D2021-03-06T17:01:05.016Z","view_time":null,"first_public_time":"$D2019-07-05T00:15:11.139Z","fork":true,"stars":2,"starred":false,"owner":{"type":"team","id":"73791a98eb1d1aba","login":"mxfh","name":"Friedrich Hartmann","avatar_url":"https://avatars-next.observableusercontent.com/818cb024720e209d4fdfb80fe502f8b526a56228002909307ede85d6a28077f0","tier":"starter_2024"},"version":797,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"847f32641b425b1b","login":"mxfh","name":"Friedrich Hartmann","avatar_url":"https://avatars-next.observableusercontent.com/818cb024720e209d4fdfb80fe502f8b526a56228002909307ede85d6a28077f0","tier":null}],"members":[{"type":"individual","id":"847f32641b425b1b","login":"mxfh","name":"Friedrich Hartmann","avatar_url":"https://avatars-next.observableusercontent.com/818cb024720e209d4fdfb80fe502f8b526a56228002909307ede85d6a28077f0","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":2,"collection":null,"type":"notebook","body":{"title":"Dwitter Dweet De-Obfuscator","cells":[{"id":339,"value":"md`# [Dwitter](https://www.dwitter.net/) Dweet De-Obfuscator`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":10,"value":"{\n // todo: add fullscreen\n let c = html`

`;\n yield c;\n // var c = document.querySelector(\"#c\");\n c.width = 1920;\n c.height = 1200;\n const x = c.getContext(\"2d\");\n let startT = +new Date();\n\n function u(t) {\n var i, j, p, a, n;\n dweet(t);\n }\n\n function loop() {\n requestAnimationFrame(loop);\n u((new Date() - startT) / 1000);\n }\n loop();\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":70,"value":"viewof dweetstr = dweettextarea({\n title: \"Paste your dweet here\",\n value: \"(F=Z=>{for(x.fillStyle=R(W=1/Z*4e3,W/2,W/4),i=Z*Z*2;n=i%Z,m=i/Z|0,i--;n%2^m%2&&x.fillRect((n-t%2-1)*W,(S(t)+m-1)*W,W,W));Z&&F(Z-6)})(36)//rm\"\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":436,"value":"md`The parsed Dweet as run (in global scope with passed context) in this notebook:`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":348,"value":"md`\n\\`\\`\\`javascript\n${dweet}\n\\`\\`\\`\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":336,"value":"md`* \\`\\`context\\`\\`, was \\`\\`x\\`\\`, is [CanvasRenderingContext2D](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D) of output [Canvas element](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API) (was \\`\\`c\\`\\`)\n* \\`\\`rgbaFn\\`\\`, was \\`\\`R\\`\\`, takes and executes 4 arguments; returns a [CSS rgba String](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#RGB_colors)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":410,"value":"// TODO: avoid declaring globally\nrgbaFn = window.rgbaFn = function(r, g, b, a) {\n a = a === undefined ? 1 : a;\n return \"rgba(\" + (r | 0) + \",\" + (g | 0) + \",\" + (b | 0) + \",\" + a + \")\";\n };","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":388,"value":"parsedDweet = parseDweet(dweetstr)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":192,"value":"// TODO proper refactoring in parsed AST\n// TODO OPTIONAL source map and highlighting\nfunction parseDweet(dweetStr) {\n var dwitterFnDictionary = {\n S: \"Math.sin\",\n C: \"Math.cos\",\n T: \"Math.tan\",\n R: \"rgbaFn\"\n };\n var dwitterObjDictionary = {\n c: \"context.canvas\",\n x: \"context\"\n };\n var parsedStr = 'function u(t,context){' + dweetStr + '\\n}';\n parsedStr = prettier.format(parsedStr, {\n parser: \"babel\",\n plugins: [prettierPlugins],\n printWidth: 72\n });\n for (var key in dwitterFnDictionary) {\n var rx = new RegExp(\"(?!\\w)\" + key + \"(?=\\\\(|\\\\s*[\\\\.\\\\[])\", \"gm\");\n parsedStr = parsedStr.replace(rx, dwitterFnDictionary[key]);\n }\n return new Function('return ' + parsedStr)();\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":72,"value":"import {input} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":82,"value":"// adapted from textarea from \"@jashkenas/inputs\"\nfunction dweettextarea(config = {}) {\n let {value, title, description, autocomplete, cols = 74, rows = 3, width, height, maxlength, placeholder, spellcheck=false, wrap, submit} = config;\n if (typeof config == \"string\") value = config;\n if (value == null) value = \"\";\n const form = input({\n form: html`

function u(t) {
}

`, \n title, description, submit,\n attributes: {autocomplete, cols, rows, maxlength, placeholder, spellcheck, wrap}\n });\n form.output.remove();\n if (width != null) form.input.style.width = width;\n if (height != null) form.input.style.height = height;\n if (submit) form.submit.style.margin = \"0\";\n if (title || description) form.input.style.margin = \"3px 0\";\n return form;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":628,"value":"prettier = require(\"https://unpkg.com/prettier@1.18.2/standalone.js\");","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":795,"value":"import { dweet } from \"@atesgoral/dwitter-runtime\"","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":632,"value":"prettierPlugins = require(\"https://unpkg.com/prettier@1.18.2/parser-babylon.js\");\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W30","stdlib":"1","titling":"auto"}} 2f:"$2e:body"