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Preserve tag order when reading metadata from MOBI files

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Kovid Goyal 2019-07-31 15:44:40 +05:30
parent 4da23549bf
commit 67298f3c5a
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1 changed files with 9 additions and 1 deletions
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10
src/calibre/ebooks/mobi/reader/headers.py
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@ -21,6 +21,14 @@ from polyglot.builtins import unicode_type
NULL_INDEX = 0xffffffff NULL_INDEX = 0xffffffff
def uniq(vals):
''' Remove all duplicates from vals, while preserving order. '''
vals = vals or ()
seen = set()
seen_add = seen.add
return list(x for x in vals if x not in seen and not seen_add(x))
class EXTHHeader(object): # {{{ class EXTHHeader(object): # {{{
def __init__(self, raw, codec, title): def __init__(self, raw, codec, title):
@ -135,7 +143,7 @@ class EXTHHeader(object): # {{{
if not self.mi.tags: if not self.mi.tags:
self.mi.tags = [] self.mi.tags = []
self.mi.tags.extend([x.strip() for x in clean_xml_chars(self.decode(content)).split(';')]) self.mi.tags.extend([x.strip() for x in clean_xml_chars(self.decode(content)).split(';')])
self.mi.tags = list(set(self.mi.tags)) self.mi.tags = uniq(self.mi.tags)
elif idx == 106: elif idx == 106:
try: try:
self.mi.pubdate = parse_date(self.decode(content), as_utc=False) self.mi.pubdate = parse_date(self.decode(content), as_utc=False)