feat: Allow Google Embeds from regular (non publish-to-web) links (#1533)

Improve styling to allow getting back to source document

app/embeds/GoogleSlides.js

@@ -2,9 +2,7 @@
 import * as React from "react";
 import Frame from "./components/Frame";
 
-const URL_REGEX = new RegExp(
-  "^https?://docs.google.com/presentation/d/(.*)/pub(.*)$"
-);
+const URL_REGEX = new RegExp("^https?://docs.google.com/presentation/d/(.*)$");
 
 type Props = {|
   attrs: {|
@@ -19,8 +17,19 @@ export default class GoogleSlides extends React.Component<Props> {
   render() {
     return (
       <Frame
-        src={this.props.attrs.href.replace("/pub", "/embed")}
-        title="Google Slides Embed"
+        src={this.props.attrs.href
+          .replace("/edit", "/preview")
+          .replace("/pub", "/embed")}
+        icon={
+          <img
+            src="/images/google-slides.png"
+            alt="Google Slides Icon"
+            width={16}
+            height={16}
+          />
+        }
+        canonicalUrl={this.props.attrs.href}
+        title="Google Slides"
         border
       />
     );