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Initial support for extended data stream, enough to log into TK4

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This commit is contained in:
Andrew Kay
2020-07-27 19:01:18 -05:00
parent 78e05cc6ce
commit 2a0ad37a83
4 changed files with 24 additions and 10 deletions
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23
oec/tn3270.py
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@@ -47,12 +47,13 @@ AID_KEY_MAP = {
class TN3270Session(Session):
"""TN3270 session."""
def __init__(self, terminal, host, port):
def __init__(self, terminal, host, port, extended_data_stream=True):
self.logger = logging.getLogger(__name__)
self.terminal = terminal
self.host = host
self.port = port
self.extended_data_stream = extended_data_stream
self.telnet = None
self.emulator = None
@@ -154,6 +155,9 @@ class TN3270Session(Session):
def _connect_host(self):
terminal_type = f'IBM-3278-{self.terminal.terminal_id.model}'
if self.extended_data_stream:
terminal_type += '-E'
self.telnet = Telnet(terminal_type)
self.telnet.open(self.host, self.port)
@@ -170,9 +174,9 @@ class TN3270Session(Session):
byte = 0x00
if isinstance(cell, AttributeCell):
byte = self._map_attribute(cell.attribute)
byte = self._map_attribute(cell)
elif isinstance(cell, CharacterCell):
byte = self._map_character(cell.byte)
byte = self._map_character(cell)
self.terminal.display.buffered_write(byte, index=address)
@@ -196,17 +200,24 @@ class TN3270Session(Session):
# TODO: eek, is this the correct place to do this?
self.operator_error = None
def _map_attribute(self, attribute):
def _map_attribute(self, cell):
# Only map the protected and display bits - ignore numeric, skip and modified.
return 0xc0 | (attribute.value & 0x2c)
return 0xc0 | (cell.attribute.value & 0x2c)
def _map_character(self, cell):
byte = cell.byte
def _map_character(self, byte):
if byte == DUP:
return encode_ascii_character(ord('*'))
if byte == FM:
return encode_ascii_character(ord(';'))
# TODO: Temporary workaround to show empty reverse video fields until EAB
# support is added.
if byte == 0x40 and cell.formatting is not None and cell.formatting.reverse:
return encode_ascii_character(ord('#'))
return encode_ebcdic_character(byte)
def _format_message_area(self):