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90 lines
3.5 KiB
90 lines
3.5 KiB
6 years ago
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from __future__ import print_function, unicode_literals
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import re
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from .formatbase import FormatBase
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from .ssaevent import SSAEvent
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from .ssastyle import SSAStyle
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from .substation import parse_tags
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from .time import ms_to_times, make_time, TIMESTAMP, timestamp_to_ms
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#: Largest timestamp allowed in SubRip, ie. 99:59:59,999.
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MAX_REPRESENTABLE_TIME = make_time(h=100) - 1
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def ms_to_timestamp(ms):
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"""Convert ms to 'HH:MM:SS,mmm'"""
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# XXX throw on overflow/underflow?
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if ms < 0: ms = 0
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if ms > MAX_REPRESENTABLE_TIME: ms = MAX_REPRESENTABLE_TIME
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h, m, s, ms = ms_to_times(ms)
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return "%02d:%02d:%02d,%03d" % (h, m, s, ms)
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class SubripFormat(FormatBase):
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@classmethod
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def guess_format(cls, text):
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if "[Script Info]" in text or "[V4+ Styles]" in text:
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# disambiguation vs. SSA/ASS
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return None
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for line in text.splitlines():
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if len(TIMESTAMP.findall(line)) == 2:
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return "srt"
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@classmethod
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def from_file(cls, subs, fp, format_, **kwargs):
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timestamps = [] # (start, end)
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following_lines = [] # contains lists of lines following each timestamp
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for line in fp:
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stamps = TIMESTAMP.findall(line)
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if len(stamps) == 2: # timestamp line
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start, end = map(timestamp_to_ms, stamps)
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timestamps.append((start, end))
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following_lines.append([])
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else:
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if timestamps:
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following_lines[-1].append(line)
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def prepare_text(lines):
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s = "".join(lines).strip()
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s = re.sub(r"\n* *\d+ *$", "", s) # strip number of next subtitle
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s = re.sub(r"< *i *>", r"{\i1}", s)
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s = re.sub(r"< */ *i *>", r"{\i0}", s)
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s = re.sub(r"< *s *>", r"{\s1}", s)
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s = re.sub(r"< */ *s *>", r"{\s0}", s)
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s = re.sub(r"< *u *>", "{\\u1}", s) # not r" for Python 2.7 compat, triggers unicodeescape
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s = re.sub(r"< */ *u *>", "{\\u0}", s)
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s = re.sub(r"< */? *[a-zA-Z][^>]*>", "", s) # strip other HTML tags
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s = re.sub(r"\r", "", s) # convert newlines
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s = re.sub(r"\n", r"\N", s) # convert newlines
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return s
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subs.events = [SSAEvent(start=start, end=end, text=prepare_text(lines))
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for (start, end), lines in zip(timestamps, following_lines)]
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@classmethod
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def to_file(cls, subs, fp, format_, **kwargs):
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def prepare_text(text, style):
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body = []
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for fragment, sty in parse_tags(text, style, subs.styles):
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fragment = fragment.replace(r"\h", " ")
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fragment = fragment.replace(r"\n", "\n")
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fragment = fragment.replace(r"\N", "\n")
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if sty.italic: fragment = "<i>%s</i>" % fragment
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if sty.underline: fragment = "<u>%s</u>" % fragment
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if sty.strikeout: fragment = "<s>%s</s>" % fragment
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body.append(fragment)
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return re.sub("\n+", "\n", "".join(body).strip())
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visible_lines = (line for line in subs if not line.is_comment)
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for i, line in enumerate(visible_lines, 1):
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start = ms_to_timestamp(line.start)
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end = ms_to_timestamp(line.end)
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text = prepare_text(line.text, subs.styles.get(line.style, SSAStyle.DEFAULT_STYLE))
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print("%d" % i, file=fp) # Python 2.7 compat
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print(start, "-->", end, file=fp)
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print(text, end="\n\n", file=fp)
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