X-Git-Url: https://git.ralfj.de/lilass.git/blobdiff_plain/1fabdda231c0be36747b39fd681773a03d1bcf93..8d8ac3226f3669f8524eef50161ae7241a808d7e:/dsl.py diff --git a/dsl.py b/dsl.py index dad969a..606809c 100755 --- a/dsl.py +++ b/dsl.py @@ -1,6 +1,6 @@ -#!/usr/bin/python +#!/usr/bin/python3 # DSL - easy Display Setup for Laptops -# Copyright (C) 2012 Ralf Jung +# Copyright (C) 2012-2014 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 @@ -13,157 +13,249 @@ # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License -# along with this program (gpl.txt); if not, write to the Free Software +# 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, re, subprocess -from selector_window import PositionSelection -import gui +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 + 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(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 (quoting issue?)." % linenr) - # add some convencience get functions - return result +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 + +# 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: - # 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]))) - p.communicate() - if p.returncode != 0: raise Exception("Querying xrandr for data failed.") - 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) - -def findAvailableConnector(tryConnectors): - for connector in tryConnectors: - if connector in connectors and connectors[connector]: # if the connector exists and is active (i.e. there is a resolution) - return connector - return None - -# the main function -def main(): - # 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.") + (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) - # default: screen off - args = {} # maps connector names to xrand arguments - for c in externalConnectors+[internalConnector]: - args[c] = ["--off"] +# 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 - # 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"] - 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"] - 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) +# 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__": - try: - main() - except Exception as e: - gui.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=RelativeScreenPosition.__names__.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 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: + # 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) + 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