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import { register } from "../actions/register";
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import { FONT_FAMILY, VERTICAL_ALIGN } from "../constants";
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import { ExcalidrawProps } from "../types";
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import { getFontString, updateActiveTool } from "../utils";
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import { setCursorForShape } from "../cursor";
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import { newTextElement } from "./newElement";
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import { wrapText } from "./textElement";
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import { isIframeElement } from "./typeChecks";
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import {
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ExcalidrawElement,
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ExcalidrawIframeLikeElement,
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IframeData,
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} from "./types";
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import { sanitizeHTMLAttribute } from "../data/url";
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import { MarkRequired } from "../utility-types";
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type IframeDataWithSandbox = MarkRequired<IframeData, "sandbox">;
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const embeddedLinkCache = new Map<string, IframeDataWithSandbox>();
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const RE_YOUTUBE =
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/^(?:http(?:s)?:\/\/)?(?:www\.)?youtu(?:be\.com|\.be)\/(embed\/|watch\?v=|shorts\/|playlist\?list=|embed\/videoseries\?list=)?([a-zA-Z0-9_-]+)(?:\?t=|&t=|\?start=|&start=)?([a-zA-Z0-9_-]+)?[^\s]*$/;
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const RE_VIMEO =
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/^(?:http(?:s)?:\/\/)?(?:(?:w){3}\.)?(?:player\.)?vimeo\.com\/(?:video\/)?([^?\s]+)(?:\?.*)?$/;
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const RE_FIGMA = /^https:\/\/(?:www\.)?figma\.com/;
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const RE_GH_GIST = /^https:\/\/gist\.github\.com\/([\w_-]+)\/([\w_-]+)/;
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const RE_GH_GIST_EMBED =
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/^<script[\s\S]*?\ssrc=["'](https:\/\/gist\.github\.com\/.*?)\.js["']/i;
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// not anchored to start to allow <blockquote> twitter embeds
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const RE_TWITTER =
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/(?:https?:\/\/)?(?:(?:w){3}\.)?(?:twitter|x)\.com\/[^/]+\/status\/(\d+)/;
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const RE_TWITTER_EMBED =
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/^<blockquote[\s\S]*?\shref=["'](https?:\/\/(?:twitter|x)\.com\/[^"']*)/i;
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const RE_VALTOWN =
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/^https:\/\/(?:www\.)?val\.town\/(v|embed)\/[a-zA-Z_$][0-9a-zA-Z_$]+\.[a-zA-Z_$][0-9a-zA-Z_$]+/;
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const RE_GENERIC_EMBED =
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/^<(?:iframe|blockquote)[\s\S]*?\s(?:src|href)=["']([^"']*)["'][\s\S]*?>$/i;
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const RE_GIPHY =
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/giphy.com\/(?:clips|embed|gifs)\/[a-zA-Z0-9]*?-?([a-zA-Z0-9]+)(?:[^a-zA-Z0-9]|$)/;
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const ALLOWED_DOMAINS = new Set([
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"youtube.com",
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"youtu.be",
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"vimeo.com",
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"player.vimeo.com",
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"figma.com",
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"link.excalidraw.com",
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"gist.github.com",
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"twitter.com",
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"x.com",
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"*.simplepdf.eu",
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"stackblitz.com",
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"val.town",
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"giphy.com",
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]);
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const ALLOW_SAME_ORIGIN = new Set([
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"youtube.com",
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"youtu.be",
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"vimeo.com",
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"player.vimeo.com",
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"figma.com",
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"twitter.com",
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"x.com",
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"*.simplepdf.eu",
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"stackblitz.com",
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]);
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export const createSrcDoc = (body: string) => {
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return `<html><body>${body}</body></html>`;
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};
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export const getEmbedLink = (
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link: string | null | undefined,
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): IframeDataWithSandbox | null => {
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if (!link) {
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return null;
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}
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if (embeddedLinkCache.has(link)) {
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return embeddedLinkCache.get(link)!;
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}
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const originalLink = link;
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const allowSameOrigin = ALLOW_SAME_ORIGIN.has(
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matchHostname(link, ALLOW_SAME_ORIGIN) || "",
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);
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let type: "video" | "generic" = "generic";
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let aspectRatio = { w: 560, h: 840 };
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const ytLink = link.match(RE_YOUTUBE);
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if (ytLink?.[2]) {
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const time = ytLink[3] ? `&start=${ytLink[3]}` : ``;
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const isPortrait = link.includes("shorts");
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type = "video";
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switch (ytLink[1]) {
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case "embed/":
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case "watch?v=":
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case "shorts/":
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link = `https://www.youtube.com/embed/${ytLink[2]}?enablejsapi=1${time}`;
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break;
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case "playlist?list=":
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case "embed/videoseries?list=":
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link = `https://www.youtube.com/embed/videoseries?list=${ytLink[2]}&enablejsapi=1${time}`;
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break;
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default:
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link = `https://www.youtube.com/embed/${ytLink[2]}?enablejsapi=1${time}`;
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break;
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}
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aspectRatio = isPortrait ? { w: 315, h: 560 } : { w: 560, h: 315 };
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embeddedLinkCache.set(originalLink, {
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link,
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intrinsicSize: aspectRatio,
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type,
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sandbox: { allowSameOrigin },
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});
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return {
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link,
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intrinsicSize: aspectRatio,
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type,
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sandbox: { allowSameOrigin },
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};
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}
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const vimeoLink = link.match(RE_VIMEO);
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if (vimeoLink?.[1]) {
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const target = vimeoLink?.[1];
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const error = !/^\d+$/.test(target)
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? new URIError("Invalid embed link format")
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: undefined;
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type = "video";
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link = `https://player.vimeo.com/video/${target}?api=1`;
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aspectRatio = { w: 560, h: 315 };
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//warning deliberately ommited so it is displayed only once per link
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//same link next time will be served from cache
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embeddedLinkCache.set(originalLink, {
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link,
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intrinsicSize: aspectRatio,
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type,
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sandbox: { allowSameOrigin },
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});
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return {
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link,
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intrinsicSize: aspectRatio,
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type,
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error,
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sandbox: { allowSameOrigin },
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};
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}
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const figmaLink = link.match(RE_FIGMA);
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if (figmaLink) {
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type = "generic";
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link = `https://www.figma.com/embed?embed_host=share&url=${encodeURIComponent(
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|
link,
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|
)}`;
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aspectRatio = { w: 550, h: 550 };
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embeddedLinkCache.set(originalLink, {
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link,
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intrinsicSize: aspectRatio,
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type,
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sandbox: { allowSameOrigin },
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});
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return {
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link,
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intrinsicSize: aspectRatio,
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type,
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|
sandbox: { allowSameOrigin },
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|
};
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}
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const valLink = link.match(RE_VALTOWN);
|
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|
|
if (valLink) {
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|
link =
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|
valLink[1] === "embed" ? valLink[0] : valLink[0].replace("/v", "/embed");
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|
embeddedLinkCache.set(originalLink, {
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|
link,
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|
intrinsicSize: aspectRatio,
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type,
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|
|
sandbox: { allowSameOrigin },
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|
|
});
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|
return {
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|
|
link,
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|
|
intrinsicSize: aspectRatio,
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|
type,
|
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|
|
sandbox: { allowSameOrigin },
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|
|
};
|
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|
|
}
|
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|
|
if (RE_TWITTER.test(link)) {
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|
|
const postId = link.match(RE_TWITTER)![1];
|
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|
|
|
// the embed srcdoc still supports twitter.com domain only.
|
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|
|
|
// Note that we don't attempt to parse the username as it can consist of
|
|
|
|
|
// non-latin1 characters, and the username in the url can be set to anything
|
|
|
|
|
// without affecting the embed.
|
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|
|
const safeURL = sanitizeHTMLAttribute(
|
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|
|
|
`https://twitter.com/x/status/${postId}`,
|
|
|
|
|
);
|
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|
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|
|
const ret: IframeDataWithSandbox = {
|
|
|
|
|
type: "document",
|
|
|
|
|
srcdoc: (theme: string) =>
|
|
|
|
|
createSrcDoc(
|
|
|
|
|
`<blockquote class="twitter-tweet" data-dnt="true" data-theme="${theme}"><a href="${safeURL}"></a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>`,
|
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|
|
|
),
|
|
|
|
|
intrinsicSize: { w: 480, h: 480 },
|
|
|
|
|
sandbox: { allowSameOrigin },
|
|
|
|
|
};
|
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|
|
|
embeddedLinkCache.set(originalLink, ret);
|
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|
|
|
return ret;
|
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|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (RE_GH_GIST.test(link)) {
|
|
|
|
|
const [, user, gistId] = link.match(RE_GH_GIST)!;
|
|
|
|
|
const safeURL = sanitizeHTMLAttribute(
|
|
|
|
|
`https://gist.github.com/${user}/${gistId}`,
|
|
|
|
|
);
|
|
|
|
|
const ret: IframeDataWithSandbox = {
|
|
|
|
|
type: "document",
|
|
|
|
|
srcdoc: () =>
|
|
|
|
|
createSrcDoc(`
|
|
|
|
|
<script src="${safeURL}.js"></script>
|
|
|
|
|
<style type="text/css">
|
|
|
|
|
* { margin: 0px; }
|
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|
|
table, .gist { height: 100%; }
|
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|
|
|
.gist .gist-file { height: calc(100vh - 2px); padding: 0px; display: grid; grid-template-rows: 1fr auto; }
|
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|
|
|
</style>
|
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|
|
`),
|
|
|
|
|
intrinsicSize: { w: 550, h: 720 },
|
|
|
|
|
sandbox: { allowSameOrigin },
|
|
|
|
|
};
|
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|
|
|
embeddedLinkCache.set(link, ret);
|
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|
|
|
return ret;
|
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|
|
|
}
|
|
|
|
|
|
|
|
|
|
embeddedLinkCache.set(link, {
|
|
|
|
|
link,
|
|
|
|
|
intrinsicSize: aspectRatio,
|
|
|
|
|
type,
|
|
|
|
|
sandbox: { allowSameOrigin },
|
|
|
|
|
});
|
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|
|
|
return {
|
|
|
|
|
link,
|
|
|
|
|
intrinsicSize: aspectRatio,
|
|
|
|
|
type,
|
|
|
|
|
sandbox: { allowSameOrigin },
|
|
|
|
|
};
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
export const createPlaceholderEmbeddableLabel = (
|
|
|
|
|
element: ExcalidrawIframeLikeElement,
|
|
|
|
|
): ExcalidrawElement => {
|
|
|
|
|
let text: string;
|
|
|
|
|
if (isIframeElement(element)) {
|
|
|
|
|
text = "IFrame element";
|
|
|
|
|
} else {
|
|
|
|
|
text =
|
|
|
|
|
!element.link || element?.link === "" ? "Empty Web-Embed" : element.link;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const fontSize = Math.max(
|
|
|
|
|
Math.min(element.width / 2, element.width / text.length),
|
|
|
|
|
element.width / 30,
|
|
|
|
|
);
|
|
|
|
|
const fontFamily = FONT_FAMILY.Helvetica;
|
|
|
|
|
|
|
|
|
|
const fontString = getFontString({
|
|
|
|
|
fontSize,
|
|
|
|
|
fontFamily,
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
return newTextElement({
|
|
|
|
|
x: element.x + element.width / 2,
|
|
|
|
|
y: element.y + element.height / 2,
|
|
|
|
|
strokeColor:
|
|
|
|
|
element.strokeColor !== "transparent" ? element.strokeColor : "black",
|
|
|
|
|
backgroundColor: "transparent",
|
|
|
|
|
fontFamily,
|
|
|
|
|
fontSize,
|
|
|
|
|
text: wrapText(text, fontString, element.width - 20),
|
|
|
|
|
textAlign: "center",
|
|
|
|
|
verticalAlign: VERTICAL_ALIGN.MIDDLE,
|
|
|
|
|
angle: element.angle ?? 0,
|
|
|
|
|
});
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
export const actionSetEmbeddableAsActiveTool = register({
|
|
|
|
|
name: "setEmbeddableAsActiveTool",
|
|
|
|
|
trackEvent: { category: "toolbar" },
|
|
|
|
|
target: "Tool",
|
|
|
|
|
label: "toolBar.embeddable",
|
|
|
|
|
perform: (elements, appState, _, app) => {
|
|
|
|
|
const nextActiveTool = updateActiveTool(appState, {
|
|
|
|
|
type: "embeddable",
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
setCursorForShape(app.canvas, {
|
|
|
|
|
...appState,
|
|
|
|
|
activeTool: nextActiveTool,
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
return {
|
|
|
|
|
elements,
|
|
|
|
|
appState: {
|
|
|
|
|
...appState,
|
|
|
|
|
activeTool: updateActiveTool(appState, {
|
|
|
|
|
type: "embeddable",
|
|
|
|
|
}),
|
|
|
|
|
},
|
|
|
|
|
commitToHistory: false,
|
|
|
|
|
};
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
const matchHostname = (
|
|
|
|
|
url: string,
|
|
|
|
|
/** using a Set assumes it already contains normalized bare domains */
|
|
|
|
|
allowedHostnames: Set<string> | string,
|
|
|
|
|
): string | null => {
|
|
|
|
|
try {
|
|
|
|
|
const { hostname } = new URL(url);
|
|
|
|
|
|
|
|
|
|
const bareDomain = hostname.replace(/^www\./, "");
|
|
|
|
|
|
|
|
|
|
if (allowedHostnames instanceof Set) {
|
|
|
|
|
if (ALLOWED_DOMAINS.has(bareDomain)) {
|
|
|
|
|
return bareDomain;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const bareDomainWithFirstSubdomainWildcarded = bareDomain.replace(
|
|
|
|
|
/^([^.]+)/,
|
|
|
|
|
"*",
|
|
|
|
|
);
|
|
|
|
|
if (ALLOWED_DOMAINS.has(bareDomainWithFirstSubdomainWildcarded)) {
|
|
|
|
|
return bareDomainWithFirstSubdomainWildcarded;
|
|
|
|
|
}
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const bareAllowedHostname = allowedHostnames.replace(/^www\./, "");
|
|
|
|
|
if (bareDomain === bareAllowedHostname) {
|
|
|
|
|
return bareAllowedHostname;
|
|
|
|
|
}
|
|
|
|
|
} catch (error) {
|
|
|
|
|
// ignore
|
|
|
|
|
}
|
|
|
|
|
return null;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
export const maybeParseEmbedSrc = (str: string): string => {
|
|
|
|
|
const twitterMatch = str.match(RE_TWITTER_EMBED);
|
|
|
|
|
if (twitterMatch && twitterMatch.length === 2) {
|
|
|
|
|
return twitterMatch[1];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const gistMatch = str.match(RE_GH_GIST_EMBED);
|
|
|
|
|
if (gistMatch && gistMatch.length === 2) {
|
|
|
|
|
return gistMatch[1];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (RE_GIPHY.test(str)) {
|
|
|
|
|
return `https://giphy.com/embed/${RE_GIPHY.exec(str)![1]}`;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const match = str.match(RE_GENERIC_EMBED);
|
|
|
|
|
if (match && match.length === 2) {
|
|
|
|
|
return match[1];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return str;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
export const embeddableURLValidator = (
|
|
|
|
|
url: string | null | undefined,
|
|
|
|
|
validateEmbeddable: ExcalidrawProps["validateEmbeddable"],
|
|
|
|
|
): boolean => {
|
|
|
|
|
if (!url) {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
if (validateEmbeddable != null) {
|
|
|
|
|
if (typeof validateEmbeddable === "function") {
|
|
|
|
|
const ret = validateEmbeddable(url);
|
|
|
|
|
// if return value is undefined, leave validation to default
|
|
|
|
|
if (typeof ret === "boolean") {
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
} else if (typeof validateEmbeddable === "boolean") {
|
|
|
|
|
return validateEmbeddable;
|
|
|
|
|
} else if (validateEmbeddable instanceof RegExp) {
|
|
|
|
|
return validateEmbeddable.test(url);
|
|
|
|
|
} else if (Array.isArray(validateEmbeddable)) {
|
|
|
|
|
for (const domain of validateEmbeddable) {
|
|
|
|
|
if (domain instanceof RegExp) {
|
|
|
|
|
if (url.match(domain)) {
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
} else if (matchHostname(url, domain)) {
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return !!matchHostname(url, ALLOWED_DOMAINS);
|
|
|
|
|
};
|
