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Try to force split across clear screens

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This commit is contained in:
Jarrod Johnson 2019-03-29 17:07:01 -04:00
parent e0c0f0f1f3
commit 6397709e47
1 changed files with 37 additions and 18 deletions
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55
misc/cblreader.py
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@ -1,3 +1,4 @@
import collections
import os
import struct
import sys
@ -19,29 +20,34 @@ def writeout(data):
def main(binfile, txtfile):
binf = open(binfile, 'r')
txtf = open(txtfile, 'r')
record = binf.read(16)
records = collections.deque([])
records.append(get_next_text_record(binf))
oldtcattr = termios.tcgetattr(sys.stdin.fileno())
tty.setraw(sys.stdin.fileno())
currfl = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL, currfl | os.O_NONBLOCK)
recordcount = 1
while record:
showrecords(record, txtf, binf, recordcount)
recordcount = 1
while True:
newdata = showrecords(records, txtf, binf)
select.select((sys.stdin,), (), (), 86400)
myinput = sys.stdin.read()
if myinput == '\x1b[C': # right
record = binf.read(16)
if newdata:
sys.stdout.write(newdata)
newdata = ''
if not records:
records.append(get_next_text_record(binf))
elif myinput == '\x1b[D': # left
sys.stdout.write('\x1b[2J\x1b[;H')
numrecords = 0
prevoffset = 1
while numrecords < 16 and prevoffset > 0:
restoreoffset = binf.tell() - 16
while len(records) < 16 and prevoffset > 0:
prevoffset = binf.tell() - 32
if prevoffset < 0:
prevoffset = 0
binf.seek(prevoffset)
record = binf.read(16)
if not record:
break
while record[1] != '\x02' and prevoffset > 0:
prevoffset = binf.tell() - 32
if prevoffset < 0:
@ -49,19 +55,33 @@ def main(binfile, txtfile):
binf.seek(prevoffset)
record = binf.read(16)
if record[1] == '\x02':
numrecords += 1
recordcount = numrecords
records.appendleft(record)
else:
records.appendleft(get_next_text_record(binf))
binf.seek(restoreoffset if restoreoffset > 0 else 0)
elif myinput.lower() == 'q':
break
elif myinput.lower() == 'd':
print(repr(records))
print(repr(binf.tell()))
else:
record = binf.read(16)
records.append(get_next_text_record(binf))
currfl = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL, currfl ^ os.O_NONBLOCK)
termios.tcsetattr(sys.stdin.fileno(), termios.TCSANOW, oldtcattr)
sys.stdout.write('\x1b[m')
def showrecords(record, txtf, binf, recordcount):
while record and recordcount:
def get_next_text_record(binf):
record = binf.read(16)
while record and record[1] != '\x02':
record = binf.read(16)
return record
def showrecords(records, txtf, binf):
extradata = ''
while records and records[0] and not extradata:
record = records.popleft()
recs = struct.unpack('!BBIHIBBH', record)
offset = recs[2]
size = recs[3]
@ -70,14 +90,13 @@ def showrecords(record, txtf, binf, recordcount):
tstamp = time.strftime('%m/%d %H:%M:%S ', time.localtime(tstamp))
txtf.seek(offset)
currdata = txtf.read(size)
if not records and not currdata.startswith('\x1b[2J') and '\x1b[2J' in currdata:
currdata, extradata = currdata.split('\x1b[2J', 1)
extradata = '\x1b[2J' + extradata
sys.stdout.write(currdata)
sys.stdout.write('\x1b]0;{0}\x07'.format(tstamp))
sys.stdout.flush()
recordcount -= 1
if recordcount:
record = binf.read(16)
else:
record = binf.read(16)
return extradata