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Kovid Goyal 2012-04-28 22:25:58 +05:30
parent 89e01414c5
commit 2509e6e51f
1 changed files with 9 additions and 3 deletions
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12
src/calibre/ebooks/mobi/writer8/tbs.py
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@ -132,7 +132,7 @@ def encode_strands_as_sequences(strands, tbs_type=8):
entries[-1].action == 'completes' and entries[-1].action == 'completes' and
entries[-1].length_offset != max_length_offset): entries[-1].length_offset != max_length_offset):
# I can't figure out exactly when kindlegen decides to insert # I can't figure out exactly when kindlegen decides to insert
# this # this, so disable it for now.
extra[0b1] = entries[-1].length_offset extra[0b1] = entries[-1].length_offset
if entries[0] is first_entry: if entries[0] is first_entry:
@ -143,12 +143,17 @@ def encode_strands_as_sequences(strands, tbs_type=8):
index = entries[0].index - (entries[0].parent or 0) index = entries[0].index - (entries[0].parent or 0)
if ans and not strand_seqs: if ans and not strand_seqs:
# We are in the second or later strands, so we need to use a
# special flag and index value. The index value if the entry
# index - the index of the last entry in the previous strand.
extra[0b1000] = True extra[0b1000] = True
index = last_index - entries[0].index index = last_index - entries[0].index
last_index = entries[-1].index last_index = entries[-1].index
strand_seqs.append((index, extra)) strand_seqs.append((index, extra))
# Handle the case of consecutive action == 'spans' entries # Handle the case of consecutive action == 'spans' entries. In this
# case, the 0b1 = 0 flag should be present only in the last consecutive
# spans entry.
for i, seq in enumerate(strand_seqs): for i, seq in enumerate(strand_seqs):
if i + 1 < len(strand_seqs): if i + 1 < len(strand_seqs):
if 0b1 in seq[1] and 0b1 in strand_seqs[i+1][1]: if 0b1 in seq[1] and 0b1 in strand_seqs[i+1][1]:
@ -162,7 +167,8 @@ def sequences_to_bytes(sequences):
flag_size = 3 flag_size = 3
for val, extra in sequences: for val, extra in sequences:
ans.append(encode_tbs(val, extra, flag_size)) ans.append(encode_tbs(val, extra, flag_size))
flag_size = 4 flag_size = 4 # only the first seuqence has flag size 3 as all
# subsequent sequences could need the 0b1000 flag
return b''.join(ans) return b''.join(ans)
def apply_trailing_byte_sequences(index_table, records, text_record_lengths): def apply_trailing_byte_sequences(index_table, records, text_record_lengths):