X-Git-Url: https://git.ralfj.de/lilass.git/blobdiff_plain/fa823bb6e20373991482a7d07476742452487543..45869c9872e2c3c589cf6be3ff257d1095ac4897:/dsl.py diff --git a/dsl.py b/dsl.py index 396468d..f78e67f 100755 --- a/dsl.py +++ b/dsl.py @@ -16,14 +16,45 @@ # along with this program (gpl.txt); if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -import os, sys, re, subprocess -from PyQt4 import QtGui -from selector_window import PositionSelection -app = QtGui.QApplication(sys.argv) +import argparse, sys, os, re, subprocess +import gui # for auto-config: common names of internal connectors commonInternalConnectorNames = ['LVDS', 'LVDS0', 'LVDS1', 'LVDS-0', 'LVDS-1'] +# this is as close as one can get to an enum in Python +class RelativeScreenPosition: + 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 + # Load a section-less config file: maps parameter names to space-separated lists of strings (with shell quotation) def loadConfigFile(file): import shlex @@ -43,17 +74,21 @@ def loadConfigFile(file): 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 (quoting issue?)" % linenr) + raise Exception("Invalid config, line %d: Error parsing line (may be a quoting issue)." % linenr) # add some convencience get functions return result +# 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(): p = subprocess.Popen(["xrandr", "-q"], stdout=subprocess.PIPE) connectors = {} # map of connector names to a list of resolutions connector = None # current connector for line in p.stdout: - # ignore screens - if line.startswith("Screen"): + # 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) @@ -67,14 +102,23 @@ def getXrandrInformation(): 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 + # be sure to always proprly finish up with the xrandr p.communicate() - if p.returncode != 0: raise Exception("Querying xrandr for data failed") + # if everything succeededso far, check return code + if p.returncode != 0: raise Exception("Querying xrandr for data failed.") 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) +# convert a (width, height) pair into a string to be displayed to the user def res2user(res): (w, h) = res # get ratio @@ -87,77 +131,95 @@ def res2user(res): strRatio = '16:%d' % ratio return '%dx%d (%s)' %(w, h, strRatio) -def findAvailableConnector(tryConnectors): +# return the first available connector from those listed in tryConnectors, skipping disabled connectors +def findAvailableConnector(tryConnectors, allConnectors): for connector in tryConnectors: - if connector in connectors and connectors[connector]: # if the connector exists and is active (i.e. there is a resolution) + if connector in allConnectors and allConnectors[connector]: # if the connector exists and is active (i.e. there is a resolution) return connector return None -# load connectors and options -connectors = getXrandrInformation() -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 connectors: - raise Exception("Connector %s does not exist, there is an error in your config file" % internalConnector) -else: - # auto-config - internalConnector = findAvailableConnector(commonInternalConnectorNames) - 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 connectors: - raise Exception("Connector %s does not exist, there is an error in your config file" % internalConnector) -else: - externalConnectors = connectors.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") - -# default: screen off -args = {} # maps connector names to xrand arguments -for c in externalConnectors+[internalConnector]: - args[c] = ["--off"] - -# Check what to do -usedExternalConnector = findAvailableConnector(externalConnectors) # *the* external connector which is actually used -if usedExternalConnector is not None: # there's an external screen connected, we need to ask what to do - internalResolutions = connectors[internalConnector] - externalResolutions = connectors[usedExternalConnector] - extPosition = PositionSelection(usedExternalConnector, map(res2user, internalResolutions), map(res2user, externalResolutions)) - extPosition.exec_() - if not extPosition.result(): sys.exit(1) # the user canceled - extResolution = res2xrandr(externalResolutions[extPosition.extResolutions.currentIndex()]) - intResolution = res2xrandr(internalResolutions[extPosition.intResolutions.currentIndex()]) - # build command-line - args[usedExternalConnector] = ["--mode", extResolution] # set external screen to desired resolution - if extPosition.extOnly.isChecked(): - args[usedExternalConnector] += ["--primary"] +# 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: - # there are two screens - args[internalConnector] = ["--mode", intResolution] # set internal screen to desired resolution - # set position - if extPosition.posLeft.isChecked(): - args[usedExternalConnector] += ["--left-of", internalConnector] - else: - args[usedExternalConnector] += ["--right-of", internalConnector] - # set primary screen - if extPosition.primExt.isChecked(): - args[usedExternalConnector] += ["--primary"] + # 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 = 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("-r, --relative-position", + dest="rel_position", choices=('left', 'right', 'external-only'), + help="Position of external screen relative to internal one") + cmdArgs = parser.parse_args() + + # 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 + if usedExternalConnector is not None: + # 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 = gui.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: - args[internalConnector] += ["--primary"] -else: - # use first resolution - args[internalConnector] = ["--mode", res2xrandr(connectors[internalConnector][0]), "--primary"] -# and do it -call = ["xrandr"] -for name in args: - call += ["--output", name] + args[name] -print "Call that will be made:",call -subprocess.check_call(call) + # 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) + except Exception as e: + gui.error(str(e)) + raise