X-Git-Url: https://git.ralfj.de/lilass.git/blobdiff_plain/705710cfb8b5179fe42e031c856ccd3f771a1865..14aaede5b451a5b903dde99202925eb4a016c231:/dsl.py diff --git a/dsl.py b/dsl.py index d14675f..7dc8665 100755 --- a/dsl.py +++ b/dsl.py @@ -1,24 +1,71 @@ -#!/usr/bin/python +#!/usr/bin/python3 # 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 os, sys, re, subprocess -from PyQt4 import QtGui -from selector_window import PositionSelection -app = QtGui.QApplication(sys.argv) +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. # for auto-config: common names of internal connectors -commonInternalConnectorNames = ['LVDS', 'LVDS1'] +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): +def loadConfigFile(filename): import shlex result = {} - if not os.path.exists(file): + if not os.path.exists(filename): return result # no config file # read config file linenr = 0 - with open(file) as file: - for line in file: + 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 @@ -28,17 +75,34 @@ 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 +# 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(): - 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: + 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) + m = re.search(r'^([\w\-]+) (dis)?connected ', line) if m is not None: connector = m.groups()[0] assert connector not in connectors @@ -49,14 +113,19 @@ def getXrandrInformation(): if m is not None: assert connector is not None connectors[connector].append((int(m.groups()[0]), int(m.groups()[1]))) - p.communicate() - if p.returncode != 0: raise Exception("Querying xrandr for data failed") + 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 @@ -69,77 +138,101 @@ 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 = 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") + 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 + 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 = 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: - 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: + frontend.error(str(e)) + raise