ElyMark: a table stays a table whatever its spacing; edits keep the document's table style (R2.13)

apps/ely-mark/web/src/preserve.js

@@ -1,5 +1,5 @@
 // Blocks Milkdown cannot write back stay raw text (§14.3).
-import { editorViewCtx, remarkCtx, schemaCtx, serializerCtx } from '@milkdown/kit/core'
+import { editorViewCtx, parserCtx, remarkCtx, schemaCtx, serializerCtx } from '@milkdown/kit/core'
 import { Fragment } from '@milkdown/kit/prose/model'
 import { Selection } from '@milkdown/kit/prose/state'
 import { $nodeSchema } from '@milkdown/kit/utils'
@@ -51,6 +51,10 @@ export function faithful(ctx, original) {
   const schema = ctx.get(schemaCtx)
   const serializer = ctx.get(serializerCtx)
   const written = (nodes) => serializer(schema.topNodeType.create(null, nodes)).replace(/\n+$/, '')
+  const parser = ctx.get(parserCtx)
+  // A table's spacing is free; its cells must match.
+  const kept = (node, text) =>
+    written([node]) === text || (node.type.name === 'table' && parser(text).firstChild?.eq(node))
   const rawOf = ([from, to]) => {
     const text = original.slice(from, to)
     return schema.nodes.ely_raw.create(null, text ? schema.text(text) : null)
@@ -68,8 +72,7 @@ export function faithful(ctx, original) {
   if (!blank)
     parsed.forEach((node, _, index) => {
       gap(last, at[index][0])
-      const exact = written([node]) === original.slice(...at[index])
-      nodes.push(exact ? node : rawOf(at[index]))
+      nodes.push(kept(node, original.slice(...at[index])) ? node : rawOf(at[index]))
       places.push(at[index])
       last = at[index][1]
     })