Don’t shift headings if the documents H1s

Author: dragonstyle

src/command/render/pandoc.ts

@@ -269,6 +269,7 @@ export async function runPandoc(
     const formatExtras = options.format.formatExtras
       ? (await options.format.formatExtras(
         options.source,
+        options.markdown,
         options.flags || {},
         options.format,
         options.libDir,

src/config/types.ts

@@ -281,6 +281,7 @@ export interface Format {
   resolveFormat?: (format: Format) => void;
   formatExtras?: (
     input: string,
+    markdown: string,
     flags: PandocFlags,
     format: Format,
     libDir: string,

src/format/html/format-html.ts

@@ -106,6 +106,7 @@ export function htmlFormat(
       },
       formatExtras: async (
         input: string,
+        _markdown: string,
         flags: PandocFlags,
         format: Format,
         _libDir: string,

src/format/ipynb/format-ipynb.ts

@@ -30,7 +30,12 @@ export function ipynbFormat(): Format {
       standalone: true,
       [kDefaultImageExtension]: "png",
     },
-    formatExtras: (_input: string, _flags: PandocFlags, format: Format) => {
+    formatExtras: (
+      _input: string,
+      _markdown: string,
+      _flags: PandocFlags,
+      format: Format,
+    ) => {
       // Snag the p
 
       const resolveTemplate = () => {

src/format/pdf/format-pdf.ts

@@ -109,6 +109,7 @@ function createPdfFormat(autoShiftHeadings = true, koma = true): Format {
       },
       formatExtras: (
         _input: string,
+        markdown: string,
         flags: PandocFlags,
         format: Format,
         _libDir: string,
@@ -218,8 +219,12 @@ function createPdfFormat(autoShiftHeadings = true, koma = true): Format {
           }),
         };
 
+        // Don't shift the headings if we see any H1s (we can't shift up any longer)
+        const hasLevelOneHeadings = !!markdown.match(/\n^#\s.*$/gm);
+
         // pdfs with no other heading level oriented options get their heading level shifted by -1
         if (
+          !hasLevelOneHeadings &&
           autoShiftHeadings &&
           (flags?.[kNumberSections] === true ||
             format.pandoc[kNumberSections] === true) &&

src/format/reveal/format-reveal.ts

@@ -99,6 +99,7 @@ export function revealjsFormat() {
       formatPreviewFile: revealMuliplexPreviewFile,
       formatExtras: async (
         input: string,
+        _markdown: string,
         flags: PandocFlags,
         format: Format,
         libDir: string,