Prefer text/latex and application/pdf mime types when rendering latex

news/changelog-1.9.md

@@ -199,6 +199,7 @@ All changes included in 1.9:
 
 ### `jupyter`
 
+- ([#13582](https://github.com/quarto-dev/quarto-cli/pull/13582)): Fix `application/pdf` and `text/latex` MIME types not being preferred over `image/svg+xml` when rendering Jupyter notebooks to PDF, which caused errors when `rsvg-convert` was not available.
 - ([#13748](https://github.com/quarto-dev/quarto-cli/pull/13748)): Fix stdin encoding to UTF-8 on Windows to correctly handle JSON in documents containing non-ASCII characters.
 - ([#13936](https://github.com/quarto-dev/quarto-cli/pull/13936)): Add support for q/kdb+ programming language in percent format notebooks and code cell options. (author: @benlubas)
 - ([#13936](https://github.com/quarto-dev/quarto-cli/pull/13936)): Fix `isJupyterPercentScript` regex to correctly detect percent scripts with `[raw]` cells and cells not at the start of the file. The regex now properly groups the alternation `(markdown|raw)` and uses multiline mode.

src/core/jupyter/display-data.ts

@@ -75,7 +75,8 @@ export function displayDataMimeType(
       kTextHtml,
     );
   } else if (options.toLatex) {
-    displayPriority.push(
+    // latex and pdf should be preferred over the other mime types
+    displayPriority.unshift(
       kTextLatex,
       kApplicationPdf,
     );

tests/docs/smoke-all/2026/03/24/13582.ipynb

@@ -0,0 +1,58 @@
+{
+  "metadata": {
+    "kernelspec": {
+      "display_name": "Python 3",
+      "language": "python",
+      "name": "python3"
+    },
+    "language_info": {
+      "name": "python",
+      "version": "3.10.0"
+    }
+  },
+  "nbformat": 4,
+  "nbformat_minor": 5,
+  "cells": [
+    {
+      "id": "1",
+      "cell_type": "raw",
+      "metadata": {},
+      "source": [
+        "---\n",
+        "title: \"Issue 13582: PDF MIME priority for LaTeX\"\n",
+        "format: latex\n",
+        "use-rsvg-convert: false\n",
+        "execute:\n",
+        "  enabled: false\n",
+        "_quarto:\n",
+        "  tests:\n",
+        "    latex:\n",
+        "      ensureFileRegexMatches:\n",
+        "        - [\"\\\\\\\\includegraphics[^\\\\n]*\\\\.pdf\"]\n",
+        "        - [\"\\\\\\\\includesvg\"]\n",
+        "---\n"
+      ]
+    },
+    {
+      "id": "2",
+      "cell_type": "code",
+      "metadata": {},
+      "source": [
+        "# Synthetic cell: outputs contain both application/pdf and image/svg+xml.\n",
+        "# With the fix, application/pdf should be preferred for LaTeX output."
+      ],
+      "outputs": [
+        {
+          "output_type": "execute_result",
+          "execution_count": 1,
+          "data": {
+            "application/pdf": "JVBERi0xLjAKMSAwIG9iajw8L1R5cGUvQ2F0YWxvZy9QYWdlcyAyIDAgUj4+ZW5kb2JqCjIgMCBvYmo8PC9UeXBlL1BhZ2VzL0tpZHNbMyAwIFJdL0NvdW50IDE+PmVuZG9iagozIDAgb2JqPDwvVHlwZS9QYWdlL01lZGlhQm94WzAgMCAxMDAgMTAwXS9QYXJlbnQgMiAwIFI+PmVuZG9iagp4cmVmCjAgNAowMDAwMDAwMDAwIDY1NTM1IGYgCjAwMDAwMDAwMDkgMDAwMDAgbiAKMDAwMDAwMDA1OCAwMDAwMCBuIAowMDAwMDAwMTE1IDAwMDAwIG4gCnRyYWlsZXI8PC9TaXplIDQvUm9vdCAxIDAgUj4+CnN0YXJ0eHJlZgoxOTAKJSVFT0Y=",
+            "image/svg+xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"100\" height=\"100\">\n<rect fill=\"red\" width=\"100\" height=\"100\"/>\n</svg>"
+          },
+          "metadata": {}
+        }
+      ],
+      "execution_count": 1
+    }
+  ]
+}