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Rename vars to be sensible, add comment to clarify what this is doing.

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This commit is contained in:
Dannon Baker
2016-06-22 10:37:42 -04:00
parent 56b5002aab
commit 0ab502baa1
1 changed files with 7 additions and 5 deletions
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lib/galaxy/datatypes/tabular.py
+7 -5
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@@ -56,16 +56,18 @@ class TabularData( data.Text ):
def get_chunk(self, trans, dataset, chunk):
ck_index = int(chunk)
f = open(dataset.file_name)
t_start = (ck_index * trans.app.config.display_chunk_size)
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)
t_firstnewline = f.tell()
t_skipped = t_firstnewline - t_start
ck_data = f.read(trans.app.config.display_chunk_size - (t_skipped))
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