# this is as close as one can get to an enum in Python
class RelativeScreenPosition:
- LEFT = 0
- RIGHT = 1
- EXTERNAL_ONLY = 2
+ LEFT = 0
+ RIGHT = 1
+ EXTERNAL_ONLY = 2
# storing what's necessary for screen setup
class ScreenSetup:
- def __init__(self, relPosition, intResolution, extResolution, extIsPrimary = False):
- '''relPosition must be one of the RelativeScreenPosition members, the resolutions must be (width, height) pairs'''
- self.relPosition = relPosition
- self.intResolution = intResolution # value doesn't matter if the internal screen is disabled
- self.extResolution = extResolution
- self.extIsPrimary = extIsPrimary or self.relPosition == RelativeScreenPosition.EXTERNAL_ONLY # external is always primary if it is the only one
-
- def getInternalArgs(self):
- if self.relPosition == RelativeScreenPosition.EXTERNAL_ONLY:
- return ["--off"]
- args = ["--mode", res2xrandr(self.intResolution)] # set internal screen to desired resolution
- if not self.extIsPrimary:
- args.append('--primary')
- return args
-
- def getExternalArgs(self, intName):
- args = ["--mode", res2xrandr(self.extResolution)] # set external screen to desired resolution
- if self.extIsPrimary:
- args.append('--primary')
- if self.relPosition == RelativeScreenPosition.LEFT:
- args += ['--left-of', intName]
- elif self.relPosition == RelativeScreenPosition.RIGHT:
- args += ['--right-of', intName]
- return args
+ def __init__(self, relPosition, intResolution, extResolution, extIsPrimary = False):
+ '''relPosition must be one of the RelativeScreenPosition members, the resolutions must be (width, height) pairs'''
+ self.relPosition = relPosition
+ self.intResolution = intResolution # value doesn't matter if the internal screen is disabled
+ self.extResolution = extResolution
+ self.extIsPrimary = extIsPrimary or self.relPosition == RelativeScreenPosition.EXTERNAL_ONLY # external is always primary if it is the only one
+
+ def getInternalArgs(self):
+ if self.relPosition == RelativeScreenPosition.EXTERNAL_ONLY:
+ return ["--off"]
+ args = ["--mode", res2xrandr(self.intResolution)] # set internal screen to desired resolution
+ if not self.extIsPrimary:
+ args.append('--primary')
+ return args
+
+ def getExternalArgs(self, intName):
+ args = ["--mode", res2xrandr(self.extResolution)] # set external screen to desired resolution
+ if self.extIsPrimary:
+ args.append('--primary')
+ if self.relPosition == RelativeScreenPosition.LEFT:
+ args += ['--left-of', intName]
+ elif self.relPosition == RelativeScreenPosition.RIGHT:
+ args += ['--right-of', intName]
+ return args
# Load a section-less config file: maps parameter names to space-separated lists of strings (with shell quotation)
def loadConfigFile(filename):
- import shlex
- result = {}
- if not os.path.exists(filename):
- return result # no config file
- # read config file
- linenr = 0
- with open(filename) as f:
- for line in f:
- linenr += 1
- line = line.strip()
- if not len(line) or line.startswith("#"): continue # skip empty and comment lines
- try:
- # parse line
- pos = line.index("=") # will raise exception when substring is not found
- curKey = line[:pos].strip()
- result[curKey] = shlex.split(line[pos+1:]) # shlex.split also strips
- except Exception:
- raise Exception("Invalid config, line %d: Error parsing line (may be a quoting issue)." % linenr)
- # add some convencience get functions
- return result
+ import shlex
+ result = {}
+ if not os.path.exists(filename):
+ return result # no config file
+ # read config file
+ linenr = 0
+ with open(filename) as f:
+ for line in f:
+ linenr += 1
+ line = line.strip()
+ if not len(line) or line.startswith("#"): continue # skip empty and comment lines
+ try:
+ # parse line
+ pos = line.index("=") # will raise exception when substring is not found
+ curKey = line[:pos].strip()
+ result[curKey] = shlex.split(line[pos+1:]) # shlex.split also strips
+ except Exception:
+ raise Exception("Invalid config, line %d: Error parsing line (may be a quoting issue)." % linenr)
+ # add some convencience get functions
+ return result
# helper function: execute a process, return output as iterator, throw exception if there was an error
# you *must* iterate to the end if you use this!
def processOutputGen(*args):
- with subprocess.Popen(args, stdout=subprocess.PIPE) as p:
- for line in p.stdout:
- yield line.decode("utf-8")
- if p.returncode != 0:
- raise Exception("Error executing "+str(args))
+ with subprocess.Popen(args, stdout=subprocess.PIPE) as p:
+ for line in p.stdout:
+ yield line.decode("utf-8")
+ if p.returncode != 0:
+ raise Exception("Error executing "+str(args))
def processOutputIt(*args):
- return list(processOutputGen(*args)) # list() iterates over the generator
+ return list(processOutputGen(*args)) # list() iterates over the generator
# Run xrandr and return a dict of output names mapped to lists of available resolutions, each being a (width, height) pair.
# An empty list indicates that the connector is disabled.
def getXrandrInformation():
- connectors = {} # map of connector names to a list of resolutions
- connector = None # current connector
- for line in processOutputGen("xrandr", "-q"):
- # screen?
- m = re.search(r'^Screen [0-9]+: ', line)
- if m is not None: # ignore this line
- connector = None
- continue
- # new connector?
- m = re.search(r'^([\w\-]+) (dis)?connected ', line)
- if m is not None:
- connector = m.groups()[0]
- assert connector not in connectors
- connectors[connector] = []
- continue
- # new resolution?
- m = re.search(r'^ ([\d]+)x([\d]+) +', line)
- if m is not None:
- assert connector is not None
- connectors[connector].append((int(m.groups()[0]), int(m.groups()[1])))
- continue
- # unknown line
- # not fatal as my xrandr shows strange stuff when a display is enabled, but not connected
- #raise Exception("Unknown line in xrandr output:\n"+line)
- print("Warning: Unknown xrandr line %s" % line)
- return connectors
+ connectors = {} # map of connector names to a list of resolutions
+ connector = None # current connector
+ for line in processOutputGen("xrandr", "-q"):
+ # screen?
+ m = re.search(r'^Screen [0-9]+: ', line)
+ if m is not None: # ignore this line
+ connector = None
+ continue
+ # new connector?
+ m = re.search(r'^([\w\-]+) (dis)?connected ', line)
+ if m is not None:
+ connector = m.groups()[0]
+ assert connector not in connectors
+ connectors[connector] = []
+ continue
+ # new resolution?
+ m = re.search(r'^ ([\d]+)x([\d]+) +', line)
+ if m is not None:
+ assert connector is not None
+ connectors[connector].append((int(m.groups()[0]), int(m.groups()[1])))
+ continue
+ # unknown line
+ # not fatal as my xrandr shows strange stuff when a display is enabled, but not connected
+ #raise Exception("Unknown line in xrandr output:\n"+line)
+ print("Warning: Unknown xrandr line %s" % line)
+ return connectors
# convert a (width, height) pair into a string accepted by xrandr as argument for --mode
def res2xrandr(res):
- (w, h) = res
- return str(w)+'x'+str(h)
+ (w, h) = res
+ return str(w)+'x'+str(h)
# convert a (width, height) pair into a string to be displayed to the user
def res2user(res):
- (w, h) = res
- # get ratio
- ratio = int(round(16.0*h/w))
- if ratio == 12: # 16:12 = 4:3
- strRatio = '4:3'
- elif ratio == 13: # 16:12.8 = 5:4
- strRatio = '5:4'
- else: # let's just hope this will never be 14 or more...
- strRatio = '16:%d' % ratio
- return '%dx%d (%s)' %(w, h, strRatio)
+ (w, h) = res
+ # get ratio
+ ratio = int(round(16.0*h/w))
+ if ratio == 12: # 16:12 = 4:3
+ strRatio = '4:3'
+ elif ratio == 13: # 16:12.8 = 5:4
+ strRatio = '5:4'
+ else: # let's just hope this will never be 14 or more...
+ strRatio = '16:%d' % ratio
+ return '%dx%d (%s)' %(w, h, strRatio)
# return the first available connector from those listed in tryConnectors, skipping disabled connectors
def findAvailableConnector(tryConnectors, allConnectors):
- for connector in tryConnectors:
- if connector in allConnectors and allConnectors[connector]: # if the connector exists and is active (i.e. there is a resolution)
- return connector
- return None
+ for connector in tryConnectors:
+ if connector in allConnectors and allConnectors[connector]: # if the connector exists and is active (i.e. there is a resolution)
+ return connector
+ return None
# Return a (internalConnector, externalConnectors) pair: The name of the internal connector, and a list of external connectors.
# Use the config file at ~/.dsl.conf and fall back to auto-detection
def classifyConnectors(allConnectors):
- config = loadConfigFile(os.getenv('HOME') + '/.dsl.conf')
- # find internal connector
- if 'internalConnector' in config:
- if len(config['internalConnector']) != 1:
- raise Exception("You must specify exactly one internal connector.")
- internalConnector = config['internalConnector'][0]
- if not internalConnector in allConnectors:
- raise Exception("Connector %s does not exist, there is an error in your config file." % internalConnector)
- else:
- # auto-config
- internalConnector = findAvailableConnector(commonInternalConnectorNames, allConnectors)
- if internalConnector is None:
- raise Exception("Could not automatically find internal connector, please use ~/.dsl.conf to specify it manually.")
- # all the rest is external then, obviously - unless the user wants to do that manually
- if 'externalConnectors' in config:
- externalConnectors = config['externalConnectors']
- for connector in externalConnectors:
- if not connector in allConnectors:
- raise Exception("Connector %s does not exist, there is an error in your config file." % connector)
- if connector == internalConnector:
- raise Exception("%s is both internal and external, that doesn't make sense." % connector)
- else:
- externalConnectors = list(allConnectors.keys())
- externalConnectors.remove(internalConnector)
- if not externalConnectors:
- raise Exception("No external connector found - either your config is wrong, or your machine has only one connector.")
- # done!
- return (internalConnector, externalConnectors)
+ config = loadConfigFile(os.getenv('HOME') + '/.dsl.conf')
+ # find internal connector
+ if 'internalConnector' in config:
+ if len(config['internalConnector']) != 1:
+ raise Exception("You must specify exactly one internal connector.")
+ internalConnector = config['internalConnector'][0]
+ if not internalConnector in allConnectors:
+ raise Exception("Connector %s does not exist, there is an error in your config file." % internalConnector)
+ else:
+ # auto-config
+ internalConnector = findAvailableConnector(commonInternalConnectorNames, allConnectors)
+ if internalConnector is None:
+ raise Exception("Could not automatically find internal connector, please use ~/.dsl.conf to specify it manually.")
+ # all the rest is external then, obviously - unless the user wants to do that manually
+ if 'externalConnectors' in config:
+ externalConnectors = config['externalConnectors']
+ for connector in externalConnectors:
+ if not connector in allConnectors:
+ raise Exception("Connector %s does not exist, there is an error in your config file." % connector)
+ if connector == internalConnector:
+ raise Exception("%s is both internal and external, that doesn't make sense." % connector)
+ else:
+ externalConnectors = list(allConnectors.keys())
+ externalConnectors.remove(internalConnector)
+ if not externalConnectors:
+ raise Exception("No external connector found - either your config is wrong, or your machine has only one connector.")
+ # done!
+ return (internalConnector, externalConnectors)
# if we run top-level
if __name__ == "__main__":
- try:
- # parse command-line arguments
- parser = argparse.ArgumentParser(description='easy Display Setup for Laptops')
- parser.add_argument("-f", "--frontend",
- dest="frontend",
- help="The frontend to be used for user interaction")
- parser.add_argument("-r", "--relative-position",
- dest="rel_position", choices=('left', 'right', 'external-only'),
- help="Position of external screen relative to internal one")
- parser.add_argument("-i", "--internal-only",
- dest="internal_only", action='store_true',
- help="Enable internal screen, disable all the others (as if no external screen was connected")
- cmdArgs = parser.parse_args()
-
- # load frontend
- frontend = getFrontend(cmdArgs.frontend)
-
- # load connectors and classify them
- connectors = getXrandrInformation()
- (internalConnector, externalConnectors) = classifyConnectors(connectors)
-
- # default: screen off
- connectorArgs = {} # maps connector names to xrand arguments
- for c in externalConnectors+[internalConnector]:
- connectorArgs[c] = ["--off"]
-
- # check whether we got an external screen or not
- # Check what to do
- usedExternalConnector = findAvailableConnector(externalConnectors, connectors) # *the* external connector which is actually used
- hasExternal = not cmdArgs.internal_only and usedExternalConnector is not None
- if hasExternal:
- # there's an external screen connected, we need to get a setup
- if cmdArgs.rel_position is not None:
- # use command-line arguments (can we do this relPosition stuff more elegant?)
- if cmdArgs.rel_position == 'left':
- relPosition = RelativeScreenPosition.LEFT
- elif cmdArgs.rel_position == 'right':
- relPosition = RelativeScreenPosition.RIGHT
- else:
- relPosition = RelativeScreenPosition.EXTERNAL_ONLY
- setup = ScreenSetup(relPosition, connectors[internalConnector][0], connectors[usedExternalConnector][0]) # use default resolutions
- else:
- # use GUI
- setup = frontend.setup(connectors[internalConnector], connectors[usedExternalConnector])
- if setup is None: sys.exit(1) # the user canceled
- # apply it
- connectorArgs[internalConnector] = setup.getInternalArgs()
- connectorArgs[usedExternalConnector] = setup.getExternalArgs(internalConnector)
- else:
- # use first resolution of internal connector
- connectorArgs[internalConnector] = ["--mode", res2xrandr(connectors[internalConnector][0]), "--primary"]
-
- # and do it
- call = ["xrandr"]
- for name in connectorArgs:
- call += ["--output", name] + connectorArgs[name]
- print("Call that will be made:",call)
- subprocess.check_call(call)
-
- # make sure the internal screen is really, *really* turned on if there is no external screen
- if not hasExternal:
- backlight = float(subprocess.check_output(["xbacklight", "-get"]).strip())
- if backlight == 0: # it's completely turned off, we better enable it
- subprocess.check_call(["xbacklight", "-set", "100"])
- except Exception as e:
- frontend.error(str(e))
- raise
+ try:
+ # parse command-line arguments
+ parser = argparse.ArgumentParser(description='easy Display Setup for Laptops')
+ parser.add_argument("-f", "--frontend",
+ dest="frontend",
+ help="The frontend to be used for user interaction")
+ parser.add_argument("-r", "--relative-position",
+ dest="rel_position", choices=('left', 'right', 'external-only'),
+ help="Position of external screen relative to internal one")
+ parser.add_argument("-i", "--internal-only",
+ dest="internal_only", action='store_true',
+ help="Enable internal screen, disable all the others (as if no external screen was connected")
+ cmdArgs = parser.parse_args()
+
+ # load frontend
+ frontend = getFrontend(cmdArgs.frontend)
+
+ # load connectors and classify them
+ connectors = getXrandrInformation()
+ (internalConnector, externalConnectors) = classifyConnectors(connectors)
+
+ # default: screen off
+ connectorArgs = {} # maps connector names to xrand arguments
+ for c in externalConnectors+[internalConnector]:
+ connectorArgs[c] = ["--off"]
+
+ # check whether we got an external screen or not
+ # Check what to do
+ usedExternalConnector = findAvailableConnector(externalConnectors, connectors) # *the* external connector which is actually used
+ hasExternal = not cmdArgs.internal_only and usedExternalConnector is not None
+ if hasExternal:
+ # there's an external screen connected, we need to get a setup
+ if cmdArgs.rel_position is not None:
+ # use command-line arguments (can we do this relPosition stuff more elegant?)
+ if cmdArgs.rel_position == 'left':
+ relPosition = RelativeScreenPosition.LEFT
+ elif cmdArgs.rel_position == 'right':
+ relPosition = RelativeScreenPosition.RIGHT
+ else:
+ relPosition = RelativeScreenPosition.EXTERNAL_ONLY
+ setup = ScreenSetup(relPosition, connectors[internalConnector][0], connectors[usedExternalConnector][0]) # use default resolutions
+ else:
+ # use GUI
+ setup = frontend.setup(connectors[internalConnector], connectors[usedExternalConnector])
+ if setup is None: sys.exit(1) # the user canceled
+ # apply it
+ connectorArgs[internalConnector] = setup.getInternalArgs()
+ connectorArgs[usedExternalConnector] = setup.getExternalArgs(internalConnector)
+ else:
+ # use first resolution of internal connector
+ connectorArgs[internalConnector] = ["--mode", res2xrandr(connectors[internalConnector][0]), "--primary"]
+
+ # and do it
+ call = ["xrandr"]
+ for name in connectorArgs:
+ call += ["--output", name] + connectorArgs[name]
+ print("Call that will be made:",call)
+ subprocess.check_call(call)
+
+ # make sure the internal screen is really, *really* turned on if there is no external screen
+ if not hasExternal:
+ backlight = float(subprocess.check_output(["xbacklight", "-get"]).strip())
+ if backlight == 0: # it's completely turned off, we better enable it
+ subprocess.check_call(["xbacklight", "-set", "100"])
+ except Exception as e:
+ frontend.error(str(e))
+ raise
projects / lilass.git / blobdiff