X-Git-Url: https://git.ralfj.de/lilass.git/blobdiff_plain/1435ea5976a4c64c80ab9f7ea3e46cc632e11812..f9da06538394990906d6148d7cbc2dad7a7967c7:/dsl.py?ds=inline diff --git a/dsl.py b/dsl.py index d8d88c9..890ea70 100755 --- a/dsl.py +++ b/dsl.py @@ -1,18 +1,97 @@ #!/usr/bin/python # DSL - easy Display Setup for Laptops +# Copyright (C) 2012 Ralf Jung +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -import 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 + result = {} + if not os.path.exists(file): + return result # no config file + # read config file + linenr = 0 + with open(file) as file: + for line in file: + 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 + +# 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: + # 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]+) connected ', line) + m = re.search(r'^([\w\-]+) (dis)?connected ', line) if m is not None: connector = m.groups()[0] assert connector not in connectors @@ -23,14 +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 @@ -43,51 +131,95 @@ def res2user(res): strRatio = '16:%d' % ratio return '%dx%d (%s)' %(w, h, strRatio) -# Check screen setup -internalName = "LVDS1" -externalNames = ["HDMI1", "DP1", "VGA1"] -connectors = getXrandrInformation() -internalResolutions = connectors[internalName] # there must be a screen assoicated to the internal connector -externalName = None # *the* external connector which is actually used -externalResolutions = None # resultions of the external connector -args = {} # maps connector names to xrand arguments +# 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 -# look for enabled external screen, disable all the others -for name in externalNames: - if externalResolutions is None and name in connectors: - externalName = name - externalResolutions = connectors[name] +# 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: - args[name] = ["--off"] - -# Check what to do -if externalName is not None: # we need to ask what to do - extPosition = PositionSelection(externalName, 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[externalName] = ["--mode", extResolution] # we definitely want an external screen - if extPosition.extOnly.isChecked(): - args[internalName] = ["--off"] - args[externalName] += ["--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: - # there are two screens - args[internalName] = ["--mode", intResolution] - if extPosition.posLeft.isChecked(): - args[externalName] += ["--left-of", internalName] - else: - args[externalName] += ["--right-of", internalName] - if extPosition.primExt.isChecked(): - args[externalName] += ["--primary"] + 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[internalName] += ["--primary"] -else: - args[internalName] = ["--mode", res2xrandr(internalResolutions[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