def ds9Cmd(cmd=None, trap=True, flush=False, silent=True, frame=None, get=False):
"""Issue a ds9 command, raising errors as appropriate"""
if getDefaultFrame() is None:
return
global cmdBuffer
if cmd:
if frame is not None:
cmd = "%s;" % selectFrame(frame) + cmd
if get:
return xpa.get(None, getXpaAccessPoint(), cmd, "").strip()
# Work around xpa's habit of silently truncating long lines
if cmdBuffer._lenCommands + len(cmd) > XPA_SZ_LINE - 5: # 5 to handle newlines and such like
ds9Cmd(flush=True, silent=silent)
cmdBuffer._commands += ";" + cmd
cmdBuffer._lenCommands += 1 + len(cmd)
if flush or cmdBuffer._lenCommands >= cmdBuffer._getSize():
cmd = cmdBuffer._commands + "\n"
cmdBuffer._commands = ""
cmdBuffer._lenCommands = 0
else:
return
try:
xpa.set(None, getXpaAccessPoint(), cmd, "", "", 0)
except IOError, e:
if not trap:
raise Ds9Error, "XPA: %s, (%s)" % (e, cmd)
elif not silent:
print >> sys.stderr, "Caught ds9 exception processing command \"%s\": %s" % (cmd, e)
def list_active_ds9():
"""Display information about the DS9 windows currently registered with XPA.
Notes
-----
when I start a unix socket with connect() the xpa register isn't
seeing it when I call this function. I think because it's only
listening on the inet socket which starts by default in the OS.
That's if xpans is installed on the machine. Otherwise, no
nameserver is running at all.
"""
# only run if XPA/xpans is installed on the machine
if find_xpans():
try:
sessions = xpa.get(b"xpans")
if sessions is None:
print("No active sessions")
if len(sessions) < 1:
print("No active sessions")
else:
print(sessions.decode())
except xpa.XpaException:
print("No active sessions registered")
else:
print("XPA nameserver not installed or not on PATH, \
function unavailable")
def ds9Version():
"""Return the version of ds9 in use, as a string"""
try:
v = xpa.get(None, getXpaAccessPoint(), "about", "").strip()
return v.splitlines()[1].split()[1]
except Exception, e:
print >> sys.stderr, "Error reading version: %s (%s)" % (v, e)
return "0.0.0"
def list_active_ds9(verbose=True):
"""
Display and/or return information about the DS9 windows currently
registered with the XPA.
Parameters
----------
verbose : bool
If True, prints out all the information about what DS9 windows
are active.
Returns
-------
session_list : list
The list of sessions that have been registered. Each entry in the list
is a list containing the information that xpans yields. Typically the
fourth element in that tuple contains the actual target name.
Notes
-----
when I start a unix socket with connect() the xpa register isn't
seeing it when I call this function. I think because it's only
listening on the inet socket which starts by default in the OS.
That's if xpans is installed on the machine. Otherwise, no
nameserver is running at all. This helps with object cont
"""
session_dict = {}
# only run if XPA/xpans is installed on the machine
if find_xpans():
sessions = None
try:
sessions = xpa.get(b"xpans").decode().strip().split("\n")
if ((sessions is None or len(sessions) < 1) and verbose):
print("No active sessions")
else:
for line in sessions:
classn, name, access, ids, user = tuple(line.split())
session_dict[ids] = (name, user, classn, access)
if verbose:
for line in sessions:
print(line)
except xpa.XpaException:
print("No active sessions registered")
else:
print("XPA nameserver not installed or not on PATH, \
function unavailable")
return session_dict
def list_active_ds9(verbose=True):
"""
Display and/or return information about the DS9 windows currently registered
with XPA.
Parameters
----------
verbose : bool
If True, prints out all the information about what DS9 windows are active.
Returns
-------
session_list : list
The list of sessions that have been registered. Each entry in the list
is a list containing the information that xpans yields. Typically the
fourth element in that tuple contains the actual target name.
Notes
-----
when I start a unix socket with connect() the xpa register isn't
seeing it when I call this function. I think because it's only
listening on the inet socket which starts by default in the OS.
That's if xpans is installed on the machine. Otherwise, no
nameserver is running at all. This helps with object cont
"""
session_dict = {}
# only run if XPA/xpans is installed on the machine
if find_xpans():
sessions = None
try:
sessions = xpa.get(b"xpans").decode().strip().split("\n")
if ((sessions is None or len(sessions) < 1) and verbose):
print("No active sessions")
else:
for line in sessions:
classn, name, access, ids, user = tuple(line.split())
session_dict[ids] = (name, user, classn, access)
if verbose:
for line in sessions:
print(line)
except xpa.XpaException:
print("No active sessions registered")
else:
print("XPA nameserver not installed or not on PATH, \
function unavailable")
return session_dict
def ds9Cmd(cmd=None,
trap=True,
flush=False,
silent=True,
frame=None,
get=False):
"""Issue a ds9 command, raising errors as appropriate"""
if getDefaultFrame() is None:
return
global cmdBuffer
if cmd:
if frame is not None:
cmd = "%s;" % selectFrame(frame) + cmd
if get:
return xpa.get(None, getXpaAccessPoint(), cmd, "").strip()
# Work around xpa's habit of silently truncating long lines
if cmdBuffer._lenCommands + len(
cmd) > XPA_SZ_LINE - 5: # 5 to handle newlines and such like
ds9Cmd(flush=True, silent=silent)
cmdBuffer._commands += ";" + cmd
cmdBuffer._lenCommands += 1 + len(cmd)
if flush or cmdBuffer._lenCommands >= cmdBuffer._getSize():
cmd = cmdBuffer._commands + "\n"
cmdBuffer._commands = ""
cmdBuffer._lenCommands = 0
else:
return
cmd = cmd.rstrip()
if not cmd:
return
try:
ret = xpa.set(None, getXpaAccessPoint(), cmd, "", "", 0)
if ret:
raise IOError(ret)
except IOError, e:
if not trap:
raise Ds9Error, "XPA: %s, (%s)" % (e, cmd)
elif not silent:
print >> sys.stderr, "Caught ds9 exception processing command \"%s\": %s" % (
cmd, e)
