81 lines
1.9 KiB
JavaScript
81 lines
1.9 KiB
JavaScript
// @flow
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import * as React from "react";
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const URL_REGEX = new RegExp(
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"^https://gist.github.com/([a-zd](?:[a-zd]|-(?=[a-zd])){0,38})/(.*)$"
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);
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type Props = {|
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attrs: {|
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href: string,
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matches: string[],
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|},
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|};
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class Gist extends React.Component<Props> {
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iframeNode: ?HTMLIFrameElement;
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static ENABLED = [URL_REGEX];
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componentDidMount() {
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this.updateIframeContent();
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}
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get id() {
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const gistUrl = new URL(this.props.attrs.href);
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return gistUrl.pathname.split("/")[2];
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}
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updateIframeContent() {
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const id = this.id;
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const iframe = this.iframeNode;
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if (!iframe) return;
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// We need to add some temporary content to the iframe for the document
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// to be available, otherwise it's undefined on first load
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const temp = document.getElementById("gist");
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if (temp) {
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temp.innerHTML = "";
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temp.appendChild(iframe);
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}
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// $FlowFixMe
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let doc = iframe.document;
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if (iframe.contentDocument) {
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doc = iframe.contentDocument;
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} else if (iframe.contentWindow) {
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doc = iframe.contentWindow.document;
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}
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const gistLink = `https://gist.github.com/${id}.js`;
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const gistScript = `<script type="text/javascript" src="${gistLink}"></script>`;
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const styles =
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"<style>*{ font-size:12px; } body { margin: 0; } .gist .blob-wrapper.data { max-height:150px; overflow:auto; }</style>";
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const iframeHtml = `<html><head><base target="_parent">${styles}</head><body>${gistScript}</body></html>`;
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doc.open();
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doc.writeln(iframeHtml);
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doc.close();
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}
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render() {
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const id = this.id;
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return (
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<iframe
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ref={(ref) => {
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this.iframeNode = ref;
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}}
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type="text/html"
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frameBorder="0"
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width="100%"
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height="200px"
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id={`gist-${id}`}
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title={`Github Gist (${id})`}
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/>
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);
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}
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}
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export default Gist;
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