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ePub: try harder to find image files.

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This commit is contained in:
Thibaut Cuvelier 2021-02-19 20:59:20 +01:00
parent 358e4ace56
commit b9f355fdb1
2 changed files with 35 additions and 12 deletions
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4
lib/configure.py
View File

@ -1013,9 +1013,9 @@ def checkConverterEntries():
xpath = 'none'
global java
if xsltproc != '':
addToRC('\\converter docbook5 epub "python $$s/scripts/docbook2epub.py none none \\"' + xsltproc + '\\" ' + xpath + ' $$i $$o" ""')
addToRC('\\converter docbook5 epub "python $$s/scripts/docbook2epub.py none none \\"' + xsltproc + '\\" ' + xpath + ' $$i $$r $$o" ""')
elif java != '':
addToRC('\\converter docbook5 epub "python $$s/scripts/docbook2epub.py \\"' + java + '\\" none none ' + xpath + ' $$i $$o" ""')
addToRC('\\converter docbook5 epub "python $$s/scripts/docbook2epub.py \\"' + java + '\\" none none ' + xpath + ' $$i $$r $$o" ""')
#
checkProg('a MS Word Office Open XML converter -> LaTeX', ['pandoc -s -f docx -o $$o -t latex $$i'],
rc_entry = [ r'\converter word2 latex "%%" ""' ])

43
lib/scripts/docbook2epub.py
View File

@ -9,7 +9,7 @@
# Full author contact details are available in file CREDITS
# Usage:
# python docbook2epub.py java_binary saxon_path xsltproc_path xslt_path in.docbook out.epub
# python docbook2epub.py java_binary saxon_path xsltproc_path xslt_path in.docbook in.orig.path out.epub
from __future__ import print_function
@ -26,13 +26,20 @@ def _parse_nullable_argument(arg):
return arg if arg != '' and arg != 'none' else None
class ImageRename:
def __init__(self, opf_path, local_path, epub_path):
self.opf_path = opf_path
self.local_path = local_path
self.epub_path = epub_path
class DocBookToEpub:
def __init__(self, args=None):
if args is None:
args = sys.argv
if len(args) != 7:
print('Seven arguments are expected, only %s found: %s.' % (len(args), args))
if len(args) != 8:
print('Exactly eight arguments are expected, only %s found: %s.' % (len(args), args))
sys.exit(1)
self.own_path = sys.argv[0]
@ -41,7 +48,8 @@ class DocBookToEpub:
self.xsltproc_path = _parse_nullable_argument(sys.argv[3])
self.xslt_path = _parse_nullable_argument(sys.argv[4])
self.input = sys.argv[5]
self.output = sys.argv[6]
self.input_path = sys.argv[6]
self.output = sys.argv[7]
self.script_folder = os.path.dirname(self.own_path) + '/../'
print('Generating ePub with the following parameters:')
@ -51,6 +59,7 @@ class DocBookToEpub:
print(self.xsltproc_path)
print(self.xslt_path)
print(self.input)
print(self.input_path)
print(self.output)
# Precompute paths that will be used later.
@ -127,6 +136,21 @@ class DocBookToEpub:
return images
def get_image_changes(self):
epub_folder = 'images/'
changes = []
for image in self.get_images_from_package_opf():
if os.path.exists(image):
file_system_path = image
elif os.path.exists(self.input_path + image):
file_system_path = self.input_path + image
else:
file_system_path = ''
changes.append(ImageRename(image, file_system_path, epub_folder + os.path.basename(image)))
return changes
def change_image_paths(self, file):
# This could be optimised, as the same operation is performed a zillion times on many files:
# https://www.oreilly.com/library/view/python-cookbook/0596001673/ch03s15.html
@ -135,8 +159,8 @@ class DocBookToEpub:
with open(file, 'w', encoding='utf8') as f:
for line in contents:
for (old, new) in self.renamed.items():
line = line.replace(old, new)
for change in self.renamed:
line = line.replace(change.opf_path, change.epub_path)
f.write(line)
def copy_images(self):
@ -144,8 +168,7 @@ class DocBookToEpub:
# changed in the XHTML files. Typically, the current paths are absolute.
# First, get the mapping old file => file in the ePub archive.
original_images = self.get_images_from_package_opf()
self.renamed = {img: 'images/' + os.path.basename(img) for img in original_images}
self.renamed = self.get_image_changes()
# Then, transform all paths (both OPF and XHTML files).
self.change_image_paths(self.output_dir + '/OEBPS/package.opf')
@ -157,8 +180,8 @@ class DocBookToEpub:
os.mkdir(self.output_dir + '/OEBPS/images/')
# Finally, actually copy the image files.
for (old, new) in self.renamed.items():
shutil.copyfile(old, self.output_dir + '/OEBPS/' + new)
for change in self.renamed:
shutil.copyfile(change.local_path, self.output_dir + '/OEBPS/' + change.epub_path)
def create_zip_archive(self):
with zipfile.ZipFile(self.output, 'w', zipfile.ZIP_DEFLATED) as zip: