X-Git-Url: https://git.ralfj.de/lilass.git/blobdiff_plain/4dd0918b62956f292f8448c32d8c61fbbeacfeb4..ffc98865eecc0de34e0a33d7d83461ed9d4ee29b:/dsl.py diff --git a/dsl.py b/dsl.py index 707a5c0..41db08c 100755 --- a/dsl.py +++ b/dsl.py @@ -1,6 +1,6 @@ #!/usr/bin/python3 # DSL - easy Display Setup for Laptops -# Copyright (C) 2012-2014 Ralf Jung +# Copyright (C) 2012-2015 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 @@ -17,58 +17,18 @@ # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. import argparse, sys, os, re, subprocess -from gui import getFrontend -frontend = getFrontend("cli") # the fallback, until we got a proper frontend. This is guaranteed to be available. +from enum import Enum +import gui, screen +frontend = gui.getFrontend("cli") # the fallback, until we got a proper frontend. This is guaranteed to be available. # for auto-config: common names of internal connectors commonInternalConnectorPrefixes = ['LVDS', 'eDP'] commonInternalConnectorSuffices = ['', '0', '1', '-0', '-1'] +def commonInternalConnectorNames(): + for prefix in commonInternalConnectorPrefixes: + for suffix in commonInternalConnectorSuffices: + yield prefix+suffix -# this is as close as one can get to an enum in Python -class RelativeScreenPosition: - LEFT = 0 - RIGHT = 1 - EXTERNAL_ONLY = 2 - MIRROR = 3 - - __names__ = { - 'left': LEFT, - 'right': RIGHT, - 'external-only': EXTERNAL_ONLY, - 'mirror': MIRROR - } - -# 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') - # set position - if self.relPosition == RelativeScreenPosition.LEFT: - args += ['--left-of', intName] - elif self.relPosition == RelativeScreenPosition.RIGHT: - args += ['--right-of', intName] - elif self.relPosition == RelativeScreenPosition.MIRROR: - args += ['--same-as', intName] - else: - assert self.relPosition == RelativeScreenPosition.EXTERNAL_ONLY - return args # Load a section-less config file: maps parameter names to space-separated lists of strings (with shell quotation) def loadConfigFile(filename): @@ -93,109 +53,18 @@ def loadConfigFile(filename): # add some convencience get functions return result -# iterator yielding common names of internal connectors -def commonInternalConnectorNames(): - for prefix in commonInternalConnectorPrefixes: - for suffix in commonInternalConnectorSuffices: - yield prefix+suffix - -# 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)) -def processOutputIt(*args): - 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 -# 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 - 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 +# Make sure the backlight is turned on +def turnOnBacklight(): + try: + 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 FileNotFoundError: + print("xbacklight has not been found, unable to turn your laptop backlight on.") + except subprocess.CalledProcessError: + print("xbacklight returned an error while attempting to turn your laptop backlight on.") -# 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) # if we run top-level if __name__ == "__main__": @@ -205,67 +74,36 @@ if __name__ == "__main__": dest="frontend", help="The frontend to be used for user interaction") parser.add_argument("-r", "--relative-position", - dest="rel_position", choices=RelativeScreenPosition.__names__.keys(), + dest="rel_position", choices=list(map(str.lower, screen.RelativeScreenPosition.__members__.keys())), 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 frontend early (for error mssages) + frontend = gui.getFrontend(cmdArgs.frontend) try: - # load connectors and classify them - connectors = getXrandrInformation() - (internalConnector, externalConnectors) = classifyConnectors(connectors) + # see what situation we are in + situation = screen.ScreenSituation(commonInternalConnectorNames()) - # 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 - usedExternalConnector = findAvailableConnector(externalConnectors, connectors) # *the* external connector which is actually used - hasExternal = not cmdArgs.internal_only and usedExternalConnector is not None - if hasExternal: - # compute the list of resolutons available on both - commonRes = [res for res in connectors[usedExternalConnector] if res in connectors[internalConnector]] - # there's an external screen connected, we need to get a setup - if cmdArgs.rel_position is not None: - # use command-line arguments - relPosition = RelativeScreenPosition.__names__[cmdArgs.rel_position] - if relPosition == RelativeScreenPosition.MIRROR: - setup = ScreenSetup(relPosition, commonRes[0], commonRes[0]) # use default resolutions - else: - setup = ScreenSetup(relPosition, connectors[internalConnector][0], connectors[usedExternalConnector][0]) # use default resolutions - else: - # use GUI - setup = frontend.setup(connectors[internalConnector], connectors[usedExternalConnector], commonRes) + # construct the ScreenSetup + setup = None + if situation.externalResolutions() is not None: + setup = frontend.setup(situation) 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"] + setup = ScreenSetup(intResolution = situation.internalResolutions()[0], extResolution = None) - # 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) + # call xrandr + xrandrCall = situation.forXrandr(setup) + print("Call that will be made:",xrandrCall) + subprocess.check_call(xrandrCall) # make sure the internal screen is really, *really* turned on if there is no external screen - if not hasExternal: - try: - 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 FileNotFoundError: - print("xbacklight has not been found, unable to turn your laptop backlight on.") - except subprocess.CalledProcessError: - print("xbacklight returned an error while attempting to turn your laptop backlight on.") + if setup.extResolution is None: + turnOnBacklight() except Exception as e: frontend.error(str(e)) raise