diff options
Diffstat (limited to 'ttystatus/messager.py')
| -rw-r--r-- | ttystatus/messager.py | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/ttystatus/messager.py b/ttystatus/messager.py index 6433391..c6b4f6e 100644 --- a/ttystatus/messager.py +++ b/ttystatus/messager.py @@ -14,6 +14,8 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. +import fcntl +import struct import sys import time @@ -28,13 +30,34 @@ class Messager(object): self._last_time = 0 # When did we write last? self._period = 1 # How long between updates? self._cached_msg = '' # Last message from user, to write() method. - self.width = 80 # Width of terminal + self.width = self._get_terminal_width() # Width of terminal def _now(self): '''Return current time.''' # This is a wrapper around time.time(), for testing. return time.time() + def _get_terminal_width(self): # pragma: no cover + '''Return width of terminal in characters. + + If this fails, assume 80. + + Borrowed and adapted from bzrlib. + + ''' + + default_width = 80 + try: + s = struct.pack('HHHH', 0, 0, 0, 0) + x = fcntl.ioctl(self.output.fileno(), termios.TIOCGWINSZ, s) + return struct.unpack('HHHH', x)[1] + except IOError: + return default_width + except AttributeError: + if not hasattr(self.output, 'fileno'): + return default_width + raise + def _raw_write(self, string): '''Write raw data if output is terminal.''' if self.output.isatty(): |