feat: Allow embeds to be used inside tables (#5315)

shared/editor/components/Styles.ts

@@ -1222,6 +1222,10 @@ table {
     min-width: 100px;
   }
 
+  td .component-embed {
+    padding: 4px 0;
+  }
+
   .selectedCell {
     background: ${
       props.readOnly ? "inherit" : props.theme.tableSelectedBackground

shared/editor/embeds/Trello.tsx

@@ -10,7 +10,7 @@ function Trello(props: Props) {
     return (
       <Frame
         width="316px"
-        height="158px"
+        height="141px"
         src={`https://trello.com/embed/card?id=${objectId}`}
         title={`Trello Card (${objectId})`}
       />

shared/editor/extensions/PasteHandler.ts

@@ -1,7 +1,6 @@
 import { toggleMark } from "prosemirror-commands";
 import { Slice } from "prosemirror-model";
 import { Plugin } from "prosemirror-state";
-import { isInTable } from "prosemirror-tables";
 import { isUrl } from "../../utils/urls";
 import Extension from "../lib/Extension";
 import isMarkdown from "../lib/isMarkdown";
@@ -89,7 +88,6 @@ export default class PasteHandler extends Extension {
               if (
                 embeds &&
                 this.editor.commands.embed &&
-                !isInTable(state) &&
                 !isInCode(state) &&
                 !isInList(state)
               ) {

shared/editor/lib/markdown/serializer.ts

@@ -366,16 +366,20 @@ export class MarkdownSerializerState {
       row.forEach((cell, _, j) => {
         this.out += j === 0 ? "| " : " | ";
 
-        cell.forEach((para) => {
+        cell.forEach((node) => {
           // just padding the output so that empty cells take up the same space
           // as headings.
           // TODO: Ideally we'd calc the longest cell length and use that
           // to pad all the others.
-          if (para.textContent === "" && para.content.size === 0) {
+          if (
+            node.textContent === "" &&
+            node.content.size === 0 &&
+            node.type.name === "paragraph"
+          ) {
             this.out += "  ";
           } else {
             this.closed = false;
-            this.render(para, row, j);
+            this.render(node, row, j);
           }
         });
 

shared/editor/nodes/Embed.tsx

@@ -126,7 +126,9 @@ export default class Embed extends Node {
   }
 
   toMarkdown(state: MarkdownSerializerState, node: ProsemirrorNode) {
-    state.ensureNewLine();
+    if (!state.inTable) {
+      state.ensureNewLine();
+    }
     state.write(
       "[" +
         state.esc(node.attrs.href, false) +
@@ -134,7 +136,9 @@ export default class Embed extends Node {
         state.esc(node.attrs.href, false) +
         ")"
     );
-    state.write("\n\n");
+    if (!state.inTable) {
+      state.write("\n\n");
+    }
   }
 
   parseMarkdown() {

shared/editor/nodes/TableCell.ts

@@ -18,7 +18,7 @@ export default class TableCell extends Node {
 
   get schema(): NodeSpec {
     return {
-      content: "paragraph+",
+      content: "(paragraph | embed)+",
       tableRole: "cell",
       isolating: true,
       parseDOM: [{ tag: "td" }],

shared/editor/nodes/TableHeadCell.ts

@@ -16,7 +16,7 @@ export default class TableHeadCell extends Node {
 
   get schema(): NodeSpec {
     return {
-      content: "paragraph+",
+      content: "(paragraph | embed)+",
       tableRole: "header_cell",
       isolating: true,
       parseDOM: [{ tag: "th" }],

shared/editor/rules/embeds.ts

@@ -3,11 +3,7 @@ import Token from "markdown-it/lib/token";
 import { EmbedDescriptor } from "../embeds";
 
 function isParagraph(token: Token) {
-  return token.type === "paragraph_open";
+  return token?.type === "paragraph_open";
-}
-
-function isInline(token: Token) {
-  return token.type === "inline" && token.level === 1;
 }
 
 function isLinkOpen(token: Token) {
@@ -49,8 +45,8 @@ export default function linksToEmbeds(embeds: EmbedDescriptor[]) {
       let insideLink;
 
       for (let i = 0; i < tokens.length - 1; i++) {
-        // once we find an inline token look through it's children for links
+        // once we find a paragraph, look through it's children for links
-        if (isInline(tokens[i]) && isParagraph(tokens[i - 1])) {
+        if (isParagraph(tokens[i - 1])) {
           const tokenChildren = tokens[i].children || [];
 
           for (let j = 0; j < tokenChildren.length - 1; j++) {