code.delx.au - bg-scripts/blob - lib/WallChanger.py

   1 #! python
   2
   3 import commands, sys, os, os.path, subprocess, time
   4 from GregDebug import debug, setDebugLevel, DEBUG_LEVEL_DEBUG, DEBUG_LEVEL_LOW, DEBUG_LEVEL_MEDIUM, DEBUG_LEVEL_HIGH, DEBUG_INCREMENT
   5
   6 import python24_adapter # NB: Must be imported before collections
   7 import collections
   8
   9 """This is a cross platform/cross window manager way to change your current
  10 desktop image."""
  11
  12 __all__ = ('RandomBG')
  13
  14 KDE_CONFIG = os.path.expanduser('~/.kde/share/config/kdesktoprc')
  15
  16 def RandomBG(*args, **kwargs):
  17         """Desktop Changer factory"""
  18
  19         ret = None
  20
  21         debug("Testing for OSX (NonX11)", DEBUG_LEVEL_LOW)
  22         if commands.getstatusoutput("ps ax -o command -c|grep -q WindowServer")[0] == 0:
  23                 ret = __OSXChanger(*args, **kwargs)
  24
  25         if 'DISPLAY' not in os.environ or os.environ['DISPLAY'].startswith('/tmp/launch'):
  26                 # X11 is not running
  27                 return ret
  28         else:
  29                 if os.uname()[0] == 'Darwin':
  30                         # Try to detect if the X11 server is running on OSX
  31                         if commands.getstatusoutput("ps ax -o command|grep -q '/.*X11 .* %s'" % os.environ['DISPLAY'])[0] != 0:
  32                                 # X11 is not running for this display
  33                                 return ret
  34
  35         debug("Testing for KDE", DEBUG_LEVEL_LOW)
  36         if commands.getstatusoutput("xwininfo -name 'KDE Desktop'")[0] == 0:
  37                 if ret is not None:
  38                         ret.nextChanger = __KDEChanger(*args, **kwargs)
  39                 else:
  40                         ret = __KDEChanger(*args, **kwargs)
  41
  42         debug("Testing for WMaker", DEBUG_LEVEL_LOW)
  43         if commands.getstatusoutput("xlsclients | grep -qi wmaker")[0] == 0:
  44                 if ret is not None:
  45                         ret.nextChanger = __WMakerChanger(*args, **kwargs)
  46                 else:
  47                         ret = __WMakerChanger(*args, **kwargs)
  48
  49         if ret is None:
  50                 raise Exception("Unknown window manager")
  51         else:
  52                 return ret
  53
  54 class __BaseChanger(object):
  55         def __init__(self, filelist, backgroundColour='black', permanent=False):
  56                 debug('Determined the window manager is "%s"' % self.__class__.__name__, DEBUG_LEVEL_MEDIUM)
  57                 self.backgroundColour = backgroundColour
  58                 self.permanent = permanent
  59                 self.filelist = filelist
  60                 # Used to 'chain' background changers
  61                 self.nextChanger = None
  62
  63         def callChained(self, filename):
  64                 if self.nextChanger is None:
  65                         return True
  66                 else:
  67                         return self.nextChanger.changeTo(filename)
  68
  69         def cycleNext(self):
  70                 file = self.filelist.getNextRandomImage()
  71                 return self.changeTo(file) and self.callChained(file)
  72
  73         def cyclePrev(self):
  74                 file = self.filelist.getPrevRandomImage()
  75                 return self.changeTo(file) and self.callChained(file)
  76
  77         def cycleReload(self):
  78                 file = self.filelist.getCurrentImage()
  79                 return self.changeTo(file) and self.callChained(file)
  80
  81
  82 class __WMakerChanger(__BaseChanger):
  83         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  84         def _removeOldImageCache(self):
  85                 """Cleans up any old temp images"""
  86                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  87                         os.mkdir(self._ConvertedWallpaperLocation)
  88                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  89                         for filename in filenames:
  90                                 os.unlink(os.path.join(fullpath, filename))
  91                         for dirname in dirnames:
  92                                 os.unlink(os.path.join(fullpath, dirname))
  93
  94         def _convertImageFormat(self, file):
  95                 """Convert the image to a png, and store it in a local place"""
  96                 self._removeOldImageCache()
  97                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
  98                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
  99                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
 100                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 101         def changeTo(self, file):
 102                 file, convert_status = self._convertImageFormat(file)
 103                 if convert_status:
 104                         debug('Convert failed')
 105                 cmd = ["wmsetbg",
 106                         "-b", self.backgroundColour, # Sets the background colour to be what the user specified
 107                         "-S", # 'Smooth' (WTF?)
 108                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
 109 ###                     "-a", # scale the image, keeping the aspect ratio
 110                         "-u", # Force this to be the default background
 111                         "-d"  # dither
 112                         ]
 113                 if self.permanent:
 114                         cmd += ["-u"] # update the wmaker database
 115                 cmd += [file]
 116                 debug('''WMaker bgset command: "'%s'"''' % "' '".join(cmd), DEBUG_LEVEL_DEBUG)
 117                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 118
 119 class __OSXChanger(__BaseChanger):
 120         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 121         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 122
 123         def _removeOldImageCache(self):
 124                 """Cleans up any old temp images"""
 125                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 126                         os.mkdir(self._ConvertedWallpaperLocation)
 127                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 128                         for filename in filenames:
 129                                 os.unlink(os.path.join(fullpath, filename))
 130                         for dirname in dirnames:
 131                                 os.unlink(os.path.join(fullpath, dirname))
 132
 133         def _convertImageFormat(self, file):
 134                 """Convert the image to a png, and store it in a local place"""
 135                 self._removeOldImageCache()
 136                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 137                 cmd = ["convert", file, output_name]
 138                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
 139                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 140
 141         def _fixDesktopPList(self):
 142                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 143                 try:
 144                         import Foundation
 145                         desktopPList = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 146                         # Remove all but the 'default' entry
 147                         for k in desktopPList['Background'].keys():
 148                                 if k == 'default':
 149                                         continue
 150                                 desktopPList['Background'].removeObjectForKey_(k)
 151                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 152                         desktopPList.writeToFile_atomically_(self._DesktopPlistLocation, True)
 153                 except ImportError:
 154                         debug('Could not import the Foundation module, you may have problems with dual screens', DEBUG_LEVEL_MEDIUM)
 155
 156         def changeTo(self, file):
 157                 output_name, ret = self._convertImageFormat(file)
 158                 if ret: # Since 0 indicates success
 159                         debug("Convert failed %s" % ret)
 160                         return False
 161                 self._fixDesktopPList()
 162                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 163                 debug(cmd, DEBUG_LEVEL_DEBUG)
 164                 return not commands.getstatusoutput(cmd)[0]
 165
 166 class __KDEChanger(__BaseChanger):
 167         def _parseKDEConfig(self, filename = KDE_CONFIG):
 168                 fd = open(filename, 'r')
 169                 result = collection.defaultdict(dict)
 170                 section = None
 171                 for line in fd:
 172                         line = line.strip()
 173                         if not line or line.startswith('#'):
 174                                 continue
 175
 176                         if line.startswith('[') and line.endswith(']'):
 177                                 section = line[1:-1]
 178                                 result[section] = {}
 179                                 continue
 180                         elif not section:
 181                                 raise Exception('Invalid kdesktoprc file')
 182
 183                         unpack = line.split('=', 1)
 184                         if len(unpack) == 2:
 185                                 key, val = unpack
 186                         else:
 187                                 key, val = unpack[0], None
 188                         result[section][key] = val
 189
 190                 fd.close()
 191                 return result
 192
 193         def _writeKDEConfig(self, config, filename = KDE_CONFIG):
 194                 fd = open(filename, 'w')
 195                 for section, values in config.items():
 196                         print >>fd, '[%s]' % section
 197                         for k, v in values.items():
 198                                 if v != None:
 199                                         print >>fd, '%s=%s' % (k,v)
 200                                 else:
 201                                         print >>fd, k
 202                         print >>fd
 203                 fd.close()
 204
 205         def changeTo(self, file):
 206                 kdeconfig = self._parseKDEConfig()
 207                 #kdeconfig['Background Common']['DrawBackgroundPerScreen_0']='true'
 208                 for section in ('Desktop0', 'Desktop0Screen0'):
 209                         kdeconfig[section]['Wallpaper'] = file
 210                         kdeconfig[section]['UseSHM'] = 'true'
 211                         kdeconfig[section]['WallpaperMode'] = 'ScaleAndCrop'
 212                         # Ensure that random mode is disabled...
 213                         if 'MultiWallpaperMode' in kdeconfig[section]:
 214                                 del kdeconfig[section]['MultiWallpaperMode']
 215
 216                 self._writeKDEConfig(kdeconfig)
 217
 218                 return not subprocess.Popen(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'],
 219                            stdout=sys.stdout, stderr=sys.stderr, stdin=open('/dev/null', 'r')).wait()