Merge pull request #8 from SimonSegerblomRex/new-structure

Restructure single script into package

.pylintrc

@@ -0,0 +1,3 @@
+[MASTER]
+
+good-names=logger,

README.md

@@ -1,19 +1,30 @@
 pdflayers
 =========
 
-**pdflayers** is a tool for changing default visibility of PDF layers (OCGS, Optional Content Groups).
+**pdflayers** is a tool for changing default visibility of PDF layers
+(OCGs, Optional Content Groups).
 
 Installation
 ------------
 
-Currently **pdflayers** just consists of a simple python script, so you manually have to install the dependencies:
 ```shell
-python3 -m pip install --user pikepdf
+python3 -m pip install --user https://github.com/SimonSegerblomRex/pdflayers
 ```
 
 Usage
 -----
 
 ```
-python3 pdflayers.py <input file> <output file> --show <name of layer to be visible in putput>
+pdflayers <input file> <output file> --show <layer names>
 ```
+
+or
+
+```
+python -m pdflayers <input file> <output file> --show <layer names>
+```
+
+Acknowledgements
+----------------
+
+[pikepdf](https://github.com/pikepdf/pikepdf) is doing most of the work.

pdflayers/__main__.py

@@ -12,44 +12,12 @@ References:
 """
 import argparse
 import logging
-import sys
 
 import pikepdf
 
+from pdflayers import utils
 
-def set_layer_visibility(pdf, layers_to_show):
+logger = logging.getLogger(__name__)
-    """Set visibility of layers."""
-    try:
-        ocgs = pdf.root.OCProperties.OCGs
-    except (AttributeError, KeyError):
-        logging.error("Unable to locate layers in PDF.")
-        sys.exit(1)
-
-    ocgs_on = []
-    for ocg in ocgs:
-        if ocg.Name in layers_to_show:
-            logging.info("Layer %s will be visible.", ocg.Name)
-            ocgs_on.append(ocg)
-        else:
-            logging.info("Layer %s will be hidden.", ocg.Name)
-
-    ocgs_config = pikepdf.Dictionary(
-        BaseState=pikepdf.Name('/OFF'),
-        ON=ocgs_on,
-        Order=ocgs,
-    )
-
-    pdf.root.OCProperties = pikepdf.Dictionary(
-        D=ocgs_config,
-        OCGs=ocgs,
-    )
-
-    # Needed for google-chrome (at least):
-    for ocg in ocgs:
-        if '/View' in ocg.Usage:
-            del ocg.Usage.View
-        if '/Print' in ocg.Usage:
-            del ocg.Usage.Print
 
 
 def main():
@@ -72,7 +40,7 @@ def main():
 
     pdf = pikepdf.open(args.input, password=args.password)
 
-    set_layer_visibility(pdf, args.show)
+    utils.set_layer_visibility(pdf, args.show)
     pdf.remove_unreferenced_resources()
 
     save_options = {

pdflayers/utils.py

@@ -0,0 +1,42 @@
+"""Utility functions used in pdflayers."""
+import logging
+import sys
+
+import pikepdf
+
+logger = logging.getLogger(__name__)
+
+
+def set_layer_visibility(pdf, layers_to_show):
+    """Set visibility of layers."""
+    try:
+        ocgs = pdf.root.OCProperties.OCGs
+    except (AttributeError, KeyError):
+        logger.error("Unable to locate layers in PDF.")
+        sys.exit(1)
+
+    ocgs_on = []
+    for ocg in ocgs:
+        if ocg.Name in layers_to_show:
+            logger.info("Layer %s will be visible.", ocg.Name)
+            ocgs_on.append(ocg)
+        else:
+            logger.info("Layer %s will be hidden.", ocg.Name)
+
+    ocgs_config = pikepdf.Dictionary(
+        BaseState=pikepdf.Name('/OFF'),
+        ON=ocgs_on,
+        Order=ocgs,
+    )
+
+    pdf.root.OCProperties = pikepdf.Dictionary(
+        D=ocgs_config,
+        OCGs=ocgs,
+    )
+
+    # Needed for google-chrome (at least):
+    for ocg in ocgs:
+        if '/View' in ocg.Usage:
+            del ocg.Usage.View
+        if '/Print' in ocg.Usage:
+            del ocg.Usage.Print

setup.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""Setup."""
+import setuptools
+
+
+def _readme():
+    with open('README.md', 'r') as file:
+        return file.read()
+
+
+setuptools.setup(
+    name='pdflayers',
+    version='0.1.0',
+    author='Simon Segerblom Rex',
+    description='PDF layer handling.',
+    long_description=_readme(),
+    long_description_content_type='text/markdown',
+    url='https://github.com/SimonSegerblomRex/pdflayers',
+    license='MIT',
+    packages=setuptools.find_packages(),
+    entry_points={
+        'console_scripts': [
+            'pdflayers = pdflayers.__main__:main',
+        ],
+    },
+    python_requires='>=3.5',
+    install_requires=[
+        'pikepdf',
+    ],
+    classifiers=[
+        'Python :: 3'
+    ],
+)