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Merge pull request #2527 from dannon/fix_tabular_display_chunking

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Fix tabular display chunking
This commit is contained in:
Martin Cech
2016-07-05 13:21:21 -04:00
committed by GitHub
parent 3eeedc61e8 0ab502baa1
commit a630c92df4
1 changed files with 7 additions and 2 deletions
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lib/galaxy/datatypes/tabular.py
+7 -2
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@@ -61,13 +61,18 @@ class TabularData( data.Text ):
def get_chunk(self, trans, dataset, chunk):
ck_index = int(chunk)
f = open(dataset.file_name)
f.seek(ck_index * trans.app.config.display_chunk_size)
initial_offset = (ck_index * trans.app.config.display_chunk_size)
f.seek(initial_offset)
# If we aren't at the start of the file, seek to next newline. Do this better eventually.
if f.tell() != 0:
cursor = f.read(1)
while cursor and cursor != '\n':
cursor = f.read(1)
ck_data = f.read(trans.app.config.display_chunk_size)
read_start_offset = f.tell()
prechunk_skip = read_start_offset - initial_offset
# We subtract the prechunk skip out of the primary chunk read to avoid
# shifting the chunk tail onto a line it shouldn't have.
ck_data = f.read(trans.app.config.display_chunk_size - prechunk_skip)
cursor = f.read(1)
while cursor and ck_data[-1] != '\n':
ck_data += cursor