125 lines
3.9 KiB
Python
125 lines
3.9 KiB
Python
# © 2018 James R. Barlow: github.com/jbarlow83
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#
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# This file is part of OCRmyPDF.
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#
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# OCRmyPDF is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# OCRmyPDF is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
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import logging
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import shutil
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import sys
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import os
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class PicklableLoggerMixin:
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def __init__(self):
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self._log = None
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@property
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def log(self):
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if not self._log:
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self._log = self.get_logger()
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return self._log
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def __getstate__(self):
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# Python 3.6 is incapable of pickling a logger and marshalling it to another
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# process (threading._RLock error), so we disconnect it before pickling,
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# and create a new logger in the worker process.
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state = self.__dict__.copy()
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state['_log'] = None
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return state
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class PDFContext(PicklableLoggerMixin):
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"""Holds our context for a particular run of the pipeline"""
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def __init__(self, options, work_folder, origin, pdfinfo):
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PicklableLoggerMixin.__init__(self)
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self.options = options
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self.work_folder = work_folder
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self.origin = origin
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self.pdfinfo = pdfinfo
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if options:
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self.name = os.path.basename(options.input_file)
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else:
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self.name = 'origin.pdf'
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if self.name == '-':
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self.name = 'stdin'
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def get_logger(self):
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return make_logger(self.options, filename=self.name)
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def get_path(self, name):
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return os.path.join(self.work_folder, name)
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def get_page_contexts(self):
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npages = len(self.pdfinfo)
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for n in range(npages):
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yield PageContext(self, n)
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class PageContext(PicklableLoggerMixin):
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"""Holds our context for a page
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Must be pickable, so only store intrinsic/simple data elements
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"""
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def __init__(self, pdf_context, pageno):
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PicklableLoggerMixin.__init__(self)
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self.work_folder = pdf_context.work_folder
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self.origin = pdf_context.origin
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self.options = pdf_context.options
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self.name = pdf_context.name
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self.pageno = pageno
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self.pageinfo = pdf_context.pdfinfo[pageno]
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self._log = None
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def get_logger(self):
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return make_logger(self.options, filename=self.name, page=self.pageno + 1)
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def get_path(self, name):
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return os.path.join(self.work_folder, "%06d_%s" % (self.pageno + 1, name))
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def cleanup_working_files(work_folder, options):
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if options.keep_temporary_files:
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print(f"Temporary working files retained at:\n{work_folder}", file=sys.stderr)
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else:
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shutil.rmtree(work_folder, ignore_errors=True)
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class LogNameAdapter(logging.LoggerAdapter):
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def process(self, msg, kwargs):
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# return '[%s] %s' % (self.extra['filename'], msg), kwargs
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return '%s' % (msg,), kwargs
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class LogNamePageAdapter(logging.LoggerAdapter):
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def process(self, msg, kwargs):
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return (
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#'[%s:%05u] %s' % (self.extra['filename'], self.extra['page'], msg),
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'%4u: %s' % (self.extra['page'], msg),
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kwargs,
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)
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def make_logger(options=None, prefix='ocrmypdf', filename=None, page=None):
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log = logging.getLogger(prefix)
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if filename and page:
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adapter = LogNamePageAdapter(log, dict(filename=filename, page=page))
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elif filename:
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adapter = LogNameAdapter(log, dict(filename=filename))
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else:
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adapter = log
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return adapter
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