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ENH: Added PPTX to PDF/PNG #390

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ENH: Added PPTX to PDF/PNG #390

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28 changes: 27 additions & 1 deletion gramex/pptgen2/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
import pandas as pd
import pptx
import sys
import subprocess
from fnmatch import fnmatchcase
from gramex.config import app_log
from gramex.transforms import build_transform
Expand Down Expand Up @@ -103,8 +104,33 @@ def pptgen(source: Union[str, pptx.presentation.Presentation],
slide_data['slide'] = slide # Rule can use 'slide' as a variable
transition(slide, rule.get('transition', None), data)
apply_commands(rule, slide.shapes, slide_data)

# requirements: install LibreOffice, ImageMagick
# (https://learn.gramener.com/guide/pptxhandler/#pptx-to-images)

# Ensure both LibreOffice, ImageMagick are updated in the environment variables
# C:\Program Files\LibreOffice\program, C:\Program Files\ImageMagick-7.0.11-Q16-HDRI
# Add fonts to LiberOffice if they are not available by default

# Get filename, extension, save the file as pptx first
pres_name, pdf_name, file_ext = None, None, None
if target:
prs.save(target)
file_name, file_ext = os.path.splitext(target)
pres_name = f'{file_name}.pptx'
prs.save(pres_name)
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This should be prs.save(target) -- what if target has a .PPTX in caps? Just retain the original.

Instead, just extract the file_ext -- convert it to lowercase.


# if output is a pdf, use soffice to convert pptx to pdf, remove pptx file
if file_ext in ['.pdf', '.png'] and pres_name:
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I prefer if file_ext in {'.pdf', '.png'} -- i.e. set is faster than list to search in.

Nest this under if target:. You don't need to run this code unless target is specified. Then you don't need to check for pres_name

abs_path = os.path.split(os.path.abspath(target))[0]
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Check if soffice is in the path using shutilwhich.which('soffice')

If it's not there, use app_log.error() to report an error.

subprocess.call(['soffice', '--headless', '--convert-to', 'pdf', f'{pres_name}',
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Use subprocess.run instead.

'--outdir', f'{abs_path}'])
pdf_name = file_name + '.pdf'
os.remove(pres_name)

# if output is a png, use the image magick with pdf generated in previous step to convert to png, remove pdf file
if file_ext == '.png' and pdf_name:
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pdf_name will not be required.

subprocess.call(['magick', 'convert', f'{pdf_name}', f'{file_name}-%d.png'])
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Check using shutilwhich.which. Use subprocess.run

os.remove(pdf_name)
return prs


Expand Down