2022-10-10 12:50:21 +00:00
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import { useEffect, useRef } from "../deps.ts";
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import { Editor } from "../editor.tsx";
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import { PanelConfig } from "../types.ts";
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const panelHtml = `<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<base target="_top">
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<script>
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window.addEventListener("message", (message) => {
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const data = message.data;
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switch (data.type) {
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case "html":
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document.body.innerHTML = data.html;
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if (data.script) {
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try {
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eval(data.script);
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} catch (e) {
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console.error("Error evaling script", e);
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}
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}
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break;
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}
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});
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function sendEvent(name, ...args) {
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window.parent.postMessage(
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{
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type: "event",
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name,
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args,
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},
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"*"
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);
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}
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</script>
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</head>
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<body>
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Send me HTML
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</body>
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</html>`;
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export function Panel({
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config,
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editor,
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}: {
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config: PanelConfig;
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editor: Editor;
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}) {
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const iFrameRef = useRef<HTMLIFrameElement>(null);
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useEffect(() => {
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function loadContent() {
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if (iFrameRef.current?.contentWindow) {
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iFrameRef.current.contentWindow.postMessage({
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type: "html",
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html: config.html,
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script: config.script,
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});
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}
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}
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if (!iFrameRef.current) {
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return;
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}
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const iframe = iFrameRef.current;
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iframe.onload = loadContent;
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loadContent();
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return () => {
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iframe.onload = null;
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};
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}, [config.html, config.script]);
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useEffect(() => {
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const messageListener = (evt: any) => {
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if (evt.source !== iFrameRef.current!.contentWindow) {
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return;
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}
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const data = evt.data;
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if (!data) {
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return;
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}
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if (data.type === "event") {
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editor.dispatchAppEvent(data.name, ...data.args);
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}
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};
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2022-11-01 14:01:28 +00:00
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console.log("Registering event handler");
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2022-10-10 12:50:21 +00:00
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globalThis.addEventListener("message", messageListener);
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return () => {
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2022-11-01 14:01:28 +00:00
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console.log("Unregistering event handler");
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2022-10-10 12:50:21 +00:00
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globalThis.removeEventListener("message", messageListener);
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};
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}, []);
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return (
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<div className="sb-panel" style={{ flex: config.mode }}>
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<iframe srcDoc={panelHtml} ref={iFrameRef} />
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</div>
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);
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}
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