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| 1 | +// PyScript py-editor plugin |
| 2 | +import { Hook, XWorker, dedent } from "polyscript/exports"; |
| 3 | +import { TYPES } from "../core.js"; |
| 4 | + |
| 5 | +const RUN_BUTTON = `<svg style="height:20px;width:20px;vertical-align:-.125em;transform-origin:center;overflow:visible;color:green" viewBox="0 0 384 512" aria-hidden="true" role="img" xmlns="http://www.w3.org/2000/svg"><g transform="translate(192 256)" transform-origin="96 0"><g transform="translate(0,0) scale(1,1)"><path d="M361 215C375.3 223.8 384 239.3 384 256C384 272.7 375.3 288.2 361 296.1L73.03 472.1C58.21 482 39.66 482.4 24.52 473.9C9.377 465.4 0 449.4 0 432V80C0 62.64 9.377 46.63 24.52 38.13C39.66 29.64 58.21 29.99 73.03 39.04L361 215z" fill="currentColor" transform="translate(-192 -256)"></path></g></g></svg>`; |
| 6 | + |
| 7 | +let id = 0; |
| 8 | +const getID = (type) => `${type}-editor-${id++}`; |
| 9 | + |
| 10 | +const envs = new Map(); |
| 11 | + |
| 12 | +const hooks = { |
| 13 | + worker: { |
| 14 | + // works on both Pyodide and MicroPython |
| 15 | + onReady: ({ runAsync, io }, { sync }) => { |
| 16 | + io.stdout = (line) => sync.write(line); |
| 17 | + io.stderr = (line) => sync.writeErr(line); |
| 18 | + sync.revoke(); |
| 19 | + sync.runAsync = runAsync; |
| 20 | + }, |
| 21 | + }, |
| 22 | +}; |
| 23 | + |
| 24 | +async function execute({ currentTarget }) { |
| 25 | + const { env, pySrc, outDiv } = this; |
| 26 | + |
| 27 | + currentTarget.disabled = true; |
| 28 | + outDiv.innerHTML = ""; |
| 29 | + |
| 30 | + if (!envs.has(env)) { |
| 31 | + const srcLink = URL.createObjectURL(new Blob([""])); |
| 32 | + const xworker = XWorker.call(new Hook(null, hooks), srcLink, { |
| 33 | + type: this.interpreter, |
| 34 | + }); |
| 35 | + |
| 36 | + const { sync } = xworker; |
| 37 | + const { promise, resolve } = Promise.withResolvers(); |
| 38 | + envs.set(env, promise); |
| 39 | + sync.revoke = () => { |
| 40 | + URL.revokeObjectURL(srcLink); |
| 41 | + resolve(xworker); |
| 42 | + }; |
| 43 | + } |
| 44 | + |
| 45 | + // wait for the env then set the target div |
| 46 | + // before executing the current code |
| 47 | + envs.get(env).then((xworker) => { |
| 48 | + xworker.onerror = ({ error }) => { |
| 49 | + outDiv.innerHTML += `<span style='color:red'>${ |
| 50 | + error.message || error |
| 51 | + }</span>`; |
| 52 | + console.log(error); |
| 53 | + }; |
| 54 | + |
| 55 | + const enable = () => { |
| 56 | + currentTarget.disabled = false; |
| 57 | + }; |
| 58 | + const { sync } = xworker; |
| 59 | + sync.write = (str) => { |
| 60 | + outDiv.innerText += str; |
| 61 | + }; |
| 62 | + sync.writeErr = (str) => { |
| 63 | + outDiv.innerHTML += `<span style='color:red'>${str}</span>`; |
| 64 | + }; |
| 65 | + sync.runAsync(pySrc).then(enable, enable); |
| 66 | + }); |
| 67 | +} |
| 68 | + |
| 69 | +const makeRunButton = (listener, type) => { |
| 70 | + const runButton = document.createElement("button"); |
| 71 | + runButton.className = `absolute ${type}-editor-run-button`; |
| 72 | + runButton.innerHTML = RUN_BUTTON; |
| 73 | + runButton.setAttribute("aria-label", "Python Script Run Button"); |
| 74 | + runButton.addEventListener("click", listener); |
| 75 | + return runButton; |
| 76 | +}; |
| 77 | + |
| 78 | +const makeEditorDiv = (listener, type) => { |
| 79 | + const editorDiv = document.createElement("div"); |
| 80 | + editorDiv.className = `${type}-editor-input`; |
| 81 | + editorDiv.setAttribute("aria-label", "Python Script Area"); |
| 82 | + |
| 83 | + const runButton = makeRunButton(listener, type); |
| 84 | + const editorShadowContainer = document.createElement("div"); |
| 85 | + |
| 86 | + // avoid outer elements intercepting key events (reveal as example) |
| 87 | + editorShadowContainer.addEventListener("keydown", (event) => { |
| 88 | + event.stopPropagation(); |
| 89 | + }); |
| 90 | + |
| 91 | + editorDiv.append(editorShadowContainer, runButton); |
| 92 | + |
| 93 | + return editorDiv; |
| 94 | +}; |
| 95 | + |
| 96 | +const makeOutDiv = (type) => { |
| 97 | + const outDiv = document.createElement("div"); |
| 98 | + outDiv.className = `${type}-editor-output`; |
| 99 | + outDiv.id = `${getID(type)}-output`; |
| 100 | + return outDiv; |
| 101 | +}; |
| 102 | + |
| 103 | +const makeBoxDiv = (listener, type) => { |
| 104 | + const boxDiv = document.createElement("div"); |
| 105 | + boxDiv.className = `${type}-editor-box`; |
| 106 | + |
| 107 | + const editorDiv = makeEditorDiv(listener, type); |
| 108 | + const outDiv = makeOutDiv(type); |
| 109 | + boxDiv.append(editorDiv, outDiv); |
| 110 | + |
| 111 | + return [boxDiv, outDiv]; |
| 112 | +}; |
| 113 | + |
| 114 | +const init = async (script, type, interpreter) => { |
| 115 | + const [ |
| 116 | + { basicSetup, EditorView }, |
| 117 | + { Compartment }, |
| 118 | + { python }, |
| 119 | + { indentUnit }, |
| 120 | + { keymap }, |
| 121 | + { defaultKeymap }, |
| 122 | + ] = await Promise.all([ |
| 123 | + // TODO: find a way to actually produce these bundles locally |
| 124 | + import(/* webpackIgnore: true */ "../3rd-party/codemirror.js"), |
| 125 | + import(/* webpackIgnore: true */ "../3rd-party/codemirror_state.js"), |
| 126 | + import( |
| 127 | + /* webpackIgnore: true */ "../3rd-party/codemirror_lang-python.js" |
| 128 | + ), |
| 129 | + import(/* webpackIgnore: true */ "../3rd-party/codemirror_language.js"), |
| 130 | + import(/* webpackIgnore: true */ "../3rd-party/codemirror_view.js"), |
| 131 | + import(/* webpackIgnore: true */ "../3rd-party/codemirror_commands.js"), |
| 132 | + ]); |
| 133 | + |
| 134 | + const selector = script.getAttribute("target"); |
| 135 | + |
| 136 | + let target; |
| 137 | + if (selector) { |
| 138 | + target = |
| 139 | + document.getElementById(selector) || |
| 140 | + document.querySelector(selector); |
| 141 | + if (!target) throw new Error(`Unknown target ${selector}`); |
| 142 | + } else { |
| 143 | + target = document.createElement(`${type}-editor`); |
| 144 | + target.style.display = "block"; |
| 145 | + script.after(target); |
| 146 | + } |
| 147 | + |
| 148 | + if (!target.id) target.id = getID(type); |
| 149 | + if (!target.hasAttribute("exec-id")) target.setAttribute("exec-id", 0); |
| 150 | + if (!target.hasAttribute("root")) target.setAttribute("root", target.id); |
| 151 | + |
| 152 | + const env = `${interpreter}-${script.getAttribute("env") || getID(type)}`; |
| 153 | + const context = { |
| 154 | + interpreter, |
| 155 | + env, |
| 156 | + get pySrc() { |
| 157 | + return editor.state.doc.toString(); |
| 158 | + }, |
| 159 | + get outDiv() { |
| 160 | + return outDiv; |
| 161 | + }, |
| 162 | + }; |
| 163 | + |
| 164 | + // @see https://github.com/JeffersGlass/mkdocs-pyscript/blob/main/mkdocs_pyscript/js/makeblocks.js |
| 165 | + const listener = execute.bind(context); |
| 166 | + const [boxDiv, outDiv] = makeBoxDiv(listener, type); |
| 167 | + |
| 168 | + const inputChild = boxDiv.querySelector(`.${type}-editor-input > div`); |
| 169 | + const parent = inputChild.attachShadow({ mode: "open" }<
10000
/span>); |
| 170 | + // avoid inheriting styles from the outer component |
| 171 | + parent.innerHTML = `<style> :host { all: initial; }</style>`; |
| 172 | + |
| 173 | + target.appendChild(boxDiv); |
| 174 | + |
| 175 | + const doc = dedent(script.textContent).trim(); |
| 176 | + |
| 177 | + // preserve user indentation, if any |
| 178 | + const indentation = /^(\s+)/m.test(doc) ? RegExp.$1 : " "; |
| 179 | + |
| 180 | + const editor = new EditorView({ |
| 181 | + extensions: [ |
| 182 | + indentUnit.of(indentation), |
| 183 | + new Compartment().of(python()), |
| 184 | + keymap.of([ |
| 185 | + ...defaultKeymap, |
| 186 | + { key: "Ctrl-Enter", run: listener, preventDefault: true }, |
| 187 | + { key: "Cmd-Enter", run: listener, preventDefault: true }, |
| 188 | + { key: "Shift-Enter", run: listener, preventDefault: true }, |
| 189 | + ]), |
| 190 | + basicSetup, |
| 191 | + ], |
| 192 | + parent, |
| 193 | + doc, |
| 194 | + }); |
| 195 | + |
| 196 | + editor.focus(); |
| 197 | +}; |
| 198 | + |
| 199 | +// avoid too greedy MutationObserver operations at distance |
| 200 | +let timeout = 0; |
| 201 | + |
| 202 | +// reset interval value then check for new scripts |
| 203 | +const resetTimeout = () => { |
| 204 | + timeout = 0; |
| 205 | + pyEditor(); |
| 206 | +}; |
| 207 | + |
| 208 | +// triggered both ASAP on the living DOM and via MutationObserver later |
| 209 | +const pyEditor = async () => { |
| 210 | + if (timeout) return; |
| 211 | + timeout = setTimeout(resetTimeout, 250); |
| 212 | + for (const [type, interpreter] of TYPES) { |
| 213 | + const selector = `script[type="${type}-editor"]`; |
| 214 | + for (const script of document.querySelectorAll(selector)) { |
| 215 | + // avoid any further bootstrap |
| 216 | + script.type += "-active"; |
| 217 | + await init(script, type, interpreter); |
| 218 | + } |
| 219 | + } |
| 220 | +}; |
| 221 | + |
| 222 | +new MutationObserver(pyEditor).observe(document, { |
| 223 | + childList: true, |
| 224 | + subtree: true, |
| 225 | +}); |
| 226 | + |
| 227 | +// try to check the current document ASAP |
| 228 | +export default pyEditor(); |
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