juptyer: cells with only text/markdown display get output: asis

Author: jjallaire

src/core/jupyter/display-data.ts

@@ -19,12 +19,15 @@ import {
   kTextPlain,
 } from "../mime.ts";
 import {
+  JupyterCell,
   JupyterOutput,
   JupyterOutputDisplayData,
   JupyterToMarkdownOptions,
 } from "./types.ts";
 
-export function isDisplayData(output: JupyterOutput) {
+export function isDisplayData(
+  output: JupyterOutput,
+): output is JupyterOutputDisplayData {
   return ["display_data", "execute_result"].includes(output.output_type);
 }
 
@@ -139,3 +142,21 @@ export function displayDataIsJson(mimeType: string) {
 export function displayDataIsJavascript(mimeType: string) {
   return [kApplicationJavascript].includes(mimeType);
 }
+
+export function cellHasOnlyMarkdownDisplayData(
+  cell: JupyterCell,
+  options: JupyterToMarkdownOptions,
+) {
+  if (cell.outputs) {
+    return cell.outputs.every((output) => {
+      if (isDisplayData(output)) {
+        const mimeType = displayDataMimeType(output, options);
+        return mimeType && displayDataIsMarkdown(mimeType);
+      } else {
+        return false;
+      }
+    });
+  } else {
+    return false;
+  }
+}

src/core/jupyter/jupyter.ts

@@ -51,6 +51,7 @@ import {
   shouldLabelOutputContainer,
 } from "./labels.ts";
 import {
+  cellHasOnlyMarkdownDisplayData,
   displayDataIsHtml,
   displayDataIsImage,
   displayDataIsJavascript,
@@ -926,7 +927,9 @@ async function mdFromCodeCell(
     cell.options[kOutput] === "asis" ||
     // specified globally with no output override for this cell
     (options.execute[kOutput] === "asis" &&
-      cell.options[kOutput] === undefined);
+      cell.options[kOutput] === undefined) ||
+    // cell has only markdown display data
+    cellHasOnlyMarkdownDisplayData(cell, options);
 
   // markdown to return
   const md: string[] = [];