Adding theme support for WebPDF exporter (#1718)

jupyter · Feb 9, 2022 · c19ba00 · c19ba00
1 parent 84e6a06
commit c19ba00
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Showing 2 changed files with 10 additions and 4 deletions.
diff --git a/nbconvert/exporters/webpdf.py b/nbconvert/exporters/webpdf.py
@@ -87,11 +87,12 @@ async def main(temp_file):
                 args=args
             )
             page = await browser.newPage()
+            await page.emulateMedia('screen')
             await page.waitFor(100)
             await page.goto(f'file://{temp_file.name}', waitUntil='networkidle0')
             await page.waitFor(100)
 
-            pdf_params = {}
+            pdf_params = {'printBackground': True}
             if not self.paginate:
                 # Floating point precision errors cause the printed
                 # PDF from spilling over a new page by a pixel fraction.
@@ -107,11 +108,10 @@ async def main(temp_file):
                 width = dimensions['width']
                 height = dimensions['height']
                 # 200 inches is the maximum size for Adobe Acrobat Reader.
-                pdf_params = {
+                pdf_params.update({
                     'width': min(width, 200 * 72),
                     'height': min(height, 200 * 72),
-                    'printBackground': True,
-                }
+                })
             pdf_data = await page.pdf(pdf_params)
 
             await browser.close()
@@ -154,3 +154,4 @@ def from_notebook_node(self, nb, resources=None, **kw):
         resources['output_extension'] = '.pdf'
 
         return pdf_data, resources
+
diff --git a/share/jupyter/nbconvert/templates/lab/index.html.j2 b/share/jupyter/nbconvert/templates/lab/index.html.j2
@@ -43,6 +43,11 @@
     {{ resources.include_lab_theme(resources.theme) }}
 {% endif %}
 <style type="text/css">
+/* Force rendering true colors when outputing to pdf */
+* {
+  -webkit-print-color-adjust: exact;
+}
+
 /* Misc */
 a.anchor-link {
   display: none;