mirror of https://github.com/morpheus65535/bazarr
423 lines
15 KiB
Python
423 lines
15 KiB
Python
# coding=utf-8
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from __future__ import absolute_import
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import traceback
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import re
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import pysubs2
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import logging
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import time
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from .mods import EMPTY_TAG_PROCESSOR
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from .exc import EmptyEntryError
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from .registry import registry
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from subzero.language import Language
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import six
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logger = logging.getLogger(__name__)
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class SubtitleModifications(object):
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debug = False
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language = None
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initialized_mods = {}
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mods_used = []
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only_uppercase = False
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f = None
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font_style_tag_start = u"{\\"
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def __init__(self, debug=False):
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self.debug = debug
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self.initialized_mods = {}
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self.mods_used = []
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def load(self, fn=None, content=None, language=None, encoding="utf-8"):
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"""
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:param encoding: used for decoding the content when fn is given, not used in case content is given
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:param language: babelfish.Language language of the subtitle
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:param fn: filename
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:param content: unicode
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:return:
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"""
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if language:
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self.language = Language.rebuild(language, forced=False)
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self.initialized_mods = {}
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try:
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if fn:
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self.f = pysubs2.load(fn, encoding=encoding)
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elif content:
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self.f = pysubs2.SSAFile.from_string(content)
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except (IOError,
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UnicodeDecodeError,
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pysubs2.exceptions.UnknownFPSError,
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pysubs2.exceptions.UnknownFormatIdentifierError,
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pysubs2.exceptions.FormatAutodetectionError):
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if fn:
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logger.exception("Couldn't load subtitle: %s: %s", fn, traceback.format_exc())
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elif content:
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logger.exception("Couldn't load subtitle: %s", traceback.format_exc())
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return bool(self.f)
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@classmethod
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def parse_identifier(cls, identifier):
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# simple identifier
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# ("=" conditional used to avoid unpack exceptions related to bad
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# identifiers from old configs)
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if identifier in registry.mods or "=" not in identifier:
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return identifier, {}
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# identifier with params; identifier(param=value)
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split_args = identifier[identifier.find("(")+1:-1].split(",")
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args = dict((key, value) for key, value in [sub.split("=") for sub in split_args])
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return identifier[:identifier.find("(")], args
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@classmethod
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def get_mod_class(cls, identifier):
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identifier, args = cls.parse_identifier(identifier)
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return registry.mods[identifier]
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@classmethod
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def get_mod_signature(cls, identifier, **kwargs):
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return cls.get_mod_class(identifier).get_signature(**kwargs)
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def prepare_mods(self, *mods):
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parsed_mods = [(SubtitleModifications.parse_identifier(mod), mod) for mod in mods]
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final_mods = {}
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line_mods = []
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non_line_mods = []
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used_mods = []
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mods_merged = {}
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mods_merged_log = {}
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for mod_data, orig_identifier in parsed_mods:
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identifier, args = mod_data
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if identifier not in registry.mods:
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logger.error("Mod %s not loaded", identifier)
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continue
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mod_cls = registry.mods[identifier]
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# exclusive mod, kill old, use newest
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if identifier in final_mods and mod_cls.exclusive:
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final_mods.pop(identifier)
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# language-specific mod, check validity
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if mod_cls.languages and self.language not in mod_cls.languages:
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if self.debug:
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logger.debug("Skipping %s, because %r is not a valid language for this mod",
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identifier, self.language)
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continue
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if mod_cls.only_uppercase and not self.only_uppercase:
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if self.debug:
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logger.debug("Skipping %s, because the subtitle isn't all uppercase", identifier)
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continue
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# merge args of duplicate mods if possible
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elif mod_cls.args_mergeable and identifier in mods_merged:
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mods_merged[identifier] = mod_cls.merge_args(mods_merged[identifier], args)
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mods_merged_log[identifier]["identifiers"].append(orig_identifier)
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continue
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if mod_cls.args_mergeable:
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mods_merged[identifier] = mod_cls.merge_args(args, {})
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mods_merged_log[identifier] = {"identifiers": [orig_identifier], "final_identifier": orig_identifier}
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used_mods.append("%s_ORIG_POSITION" % identifier)
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continue
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final_mods[identifier] = args
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used_mods.append(orig_identifier)
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# finalize merged mods into final and used mods
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for identifier, args in six.iteritems(mods_merged):
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pos_preserve_index = used_mods.index("%s_ORIG_POSITION" % identifier)
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# clear empty mods after merging
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if not any(args.values()):
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if self.debug:
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logger.debug("Skipping %s, empty args", identifier)
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if pos_preserve_index > -1:
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used_mods.pop(pos_preserve_index)
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mods_merged_log.pop(identifier)
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continue
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# clear empty args
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final_mod_args = dict([k_v for k_v in six.iteritems(args) if bool(k_v[1])])
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_data = SubtitleModifications.get_mod_signature(identifier, **final_mod_args)
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if _data == mods_merged_log[identifier]["final_identifier"]:
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mods_merged_log.pop(identifier)
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else:
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mods_merged_log[identifier]["final_identifier"] = _data
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if pos_preserve_index > -1:
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used_mods[pos_preserve_index] = _data
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else:
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# should never happen
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used_mods.append(_data)
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final_mods[identifier] = args
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if self.debug:
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for identifier, data in six.iteritems(mods_merged_log):
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logger.debug("Merged %s to %s", data["identifiers"], data["final_identifier"])
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# separate all mods into line and non-line mods
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for identifier, args in six.iteritems(final_mods):
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mod_cls = registry.mods[identifier]
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if mod_cls.modifies_whole_file:
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non_line_mods.append((identifier, args))
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else:
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line_mods.append((mod_cls.order, identifier, args))
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# initialize the mods
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if identifier not in self.initialized_mods:
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self.initialized_mods[identifier] = mod_cls(self)
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return line_mods, non_line_mods, used_mods
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def detect_uppercase(self):
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entries_used = 0
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for entry in self.f:
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entry_used = False
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for sub in entry.text.strip().split(r"\N"):
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# skip HI bracket entries, those might actually be lowercase
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sub = sub.strip()
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for processor in registry.mods["remove_HI"].processors[:4]:
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sub = processor.process(sub)
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if sub.strip():
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# only consider alphabetic characters to determine if uppercase
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alpha_sub = ''.join([i for i in sub if i.isalpha()])
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if alpha_sub and not alpha_sub.isupper():
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return False
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entry_used = True
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else:
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# skip full entry
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break
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if entry_used:
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entries_used += 1
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if entries_used == 40:
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break
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return True
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def modify(self, *mods):
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new_entries = []
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start = time.time()
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self.only_uppercase = self.detect_uppercase()
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if self.only_uppercase and self.debug:
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logger.debug("Full-uppercase subtitle found")
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line_mods, non_line_mods, mods_used = self.prepare_mods(*mods)
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self.mods_used = mods_used
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# apply non-last file mods
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if non_line_mods:
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non_line_mods_start = time.time()
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self.apply_non_line_mods(non_line_mods)
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if self.debug:
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logger.debug("Non-Line mods took %ss", time.time() - non_line_mods_start)
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# sort line mods
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line_mods.sort(key=lambda x: (x is None, x))
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# apply line mods
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if line_mods:
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line_mods_start = time.time()
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self.apply_line_mods(new_entries, line_mods)
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if self.debug:
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logger.debug("Line mods took %ss", time.time() - line_mods_start)
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if new_entries:
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self.f.events = new_entries
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# apply last file mods
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if non_line_mods:
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non_line_mods_start = time.time()
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self.apply_non_line_mods(non_line_mods, only_last=True)
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if self.debug:
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logger.debug("Final Non-Line mods took %ss", time.time() - non_line_mods_start)
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if self.debug:
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logger.debug("Subtitle Modification took %ss", time.time() - start)
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logger.debug("Mods applied: %s" % self.mods_used)
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def apply_non_line_mods(self, mods, only_last=False):
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for identifier, args in mods:
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mod = self.initialized_mods[identifier]
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if (not only_last and not mod.apply_last) or (only_last and mod.apply_last):
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if self.debug:
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logger.debug("Applying %s", identifier)
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mod.modify(None, debug=self.debug, parent=self, **args)
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def apply_line_mods(self, new_entries, mods):
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for index, entry in enumerate(self.f, 1):
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applied_mods = []
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lines = []
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line_count = 0
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start_tags = []
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end_tags = []
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t = entry.text.strip()
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if not t:
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if self.debug:
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logger.debug(u"Skipping empty line: %s", index)
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continue
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line_split = t.split(r"\N")
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if len(line_split) > 3: # Badly parsed subtitle
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logger.error("Skipping %d lines for %s mod", len(line_split), mods)
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continue
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skip_entry = False
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for line in line_split:
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# don't bother the mods with surrounding tags
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old_line = line
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line = line.strip()
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skip_line = False
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line_count += 1
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if not line:
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continue
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# clean {\X0} tags before processing
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# fixme: handle nested tags?
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start_tag = u""
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end_tag = u""
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if line.startswith(self.font_style_tag_start):
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start_tag = line[:5]
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line = line[5:]
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if line[-5:-3] == self.font_style_tag_start:
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end_tag = line[-5:]
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line = line[:-5]
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last_procs_mods = []
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# fixme: this double loop is ugly
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for order, identifier, args in mods:
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mod = self.initialized_mods[identifier]
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try:
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line = mod.modify(line.strip(), entry=t, debug=self.debug, parent=self, index=index,
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**args)
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except EmptyEntryError:
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if self.debug:
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logger.debug(u"%d: %s: %r -> ''", index, identifier, t)
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skip_entry = True
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break
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if not line:
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if self.debug:
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logger.debug(u"%d: %s: %r -> ''", index, identifier, old_line)
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skip_line = True
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break
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applied_mods.append(identifier)
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if mod.last_processors:
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last_procs_mods.append([identifier, args])
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if skip_entry:
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lines = []
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break
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if skip_line:
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continue
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for identifier, args in last_procs_mods:
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mod = self.initialized_mods[identifier]
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try:
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line = mod.modify(line.strip(), entry=t, debug=self.debug, parent=self, index=index,
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procs=["last_process"], **args)
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except EmptyEntryError:
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if self.debug:
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logger.debug(u"%d: %s: %r -> ''", index, identifier, t)
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skip_entry = True
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break
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if not line:
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if self.debug:
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logger.debug(u"%d: %s: %r -> ''", index, identifier, old_line)
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skip_line = True
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break
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if skip_entry:
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lines = []
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break
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if skip_line:
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continue
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if start_tag:
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start_tags.append(start_tag)
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if end_tag:
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end_tags.append(end_tag)
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# append new line and clean possibly newly added empty tags
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cleaned_line = EMPTY_TAG_PROCESSOR.process(start_tag + line + end_tag, debug=self.debug).strip()
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if cleaned_line:
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# we may have a single closing tag, if so, try appending it to the previous line
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if len(cleaned_line) == 5 and cleaned_line.startswith("{\\") and cleaned_line.endswith("0}"):
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if lines:
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prev_line = lines.pop()
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lines.append(prev_line + cleaned_line)
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continue
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lines.append(cleaned_line)
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else:
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if self.debug:
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logger.debug(u"%d: Ditching now empty line (%r)", index, line)
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if not lines:
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# don't bother logging when the entry only had one line
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if self.debug and line_count > 1:
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logger.debug(u"%d: %r -> ''", index, entry.text)
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continue
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new_text = r"\N".join(lines)
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# cheap man's approach to avoid open tags
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add_start_tags = []
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add_end_tags = []
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if len(start_tags) != len(end_tags):
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for tag in start_tags:
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end_tag = tag.replace("1", "0")
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if end_tag not in end_tags and new_text.count(tag) > new_text.count(end_tag):
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add_end_tags.append(end_tag)
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for tag in end_tags:
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start_tag = tag.replace("0", "1")
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if start_tag not in start_tags and new_text.count(tag) > new_text.count(start_tag):
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add_start_tags.append(start_tag)
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if add_end_tags or add_start_tags:
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entry.text = u"".join(add_start_tags) + new_text + u"".join(add_end_tags)
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if self.debug:
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logger.debug(u"Fixing tags: %s (%r -> %r)", str(add_start_tags+add_end_tags), new_text,
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entry.text)
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else:
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entry.text = new_text
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else:
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entry.text = new_text
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new_entries.append(entry)
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SubMod = SubtitleModifications
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