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:
  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         def _removeOldImageCache(self):
 122                 """Cleans up any old temp images"""
 123                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 124                         os.mkdir(self._ConvertedWallpaperLocation)
 125                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 126                         for filename in filenames:
 127                                 os.unlink(os.path.join(fullpath, filename))
 128                         for dirname in dirnames:
 129                                 os.unlink(os.path.join(fullpath, dirname))
 130
 131         def _convertImageFormat(self, file):
 132                 """Convert the image to a png, and store it in a local place"""
 133                 self._removeOldImageCache()
 134                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 135                 cmd = ["convert", file, output_name]
 136                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
 137                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 138
 139         def changeTo(self, file):
 140                 output_name, ret = self._convertImageFormat(file)
 141                 if ret: # Since 0 indicates success
 142                         debug("Convert failed %s" % ret)
 143                         return False
 144                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 145                 debug(cmd, DEBUG_LEVEL_DEBUG)
 146                 return not commands.getstatusoutput(cmd)[0]
 147
 148 class __KDEChanger(__BaseChanger):
 149         def _parseKDEConfig(self, filename = KDE_CONFIG):
 150                 fd = open(filename, 'r')
 151                 result = collection.defaultdict(dict)
 152                 section = None
 153                 for line in fd:
 154                         line = line.strip()
 155                         if not line or line.startswith('#'):
 156                                 continue
 157
 158                         if line.startswith('[') and line.endswith(']'):
 159                                 section = line[1:-1]
 160                                 result[section] = {}
 161                                 continue
 162                         elif not section:
 163                                 raise Exception('Invalid kdesktoprc file')
 164
 165                         unpack = line.split('=', 1)
 166                         if len(unpack) == 2:
 167                                 key, val = unpack
 168                         else:
 169                                 key, val = unpack[0], None
 170                         result[section][key] = val
 171
 172                 fd.close()
 173                 return result
 174
 175         def _writeKDEConfig(self, config, filename = KDE_CONFIG):
 176                 fd = open(filename, 'w')
 177                 for section, values in config.items():
 178                         print >>fd, '[%s]' % section
 179                         for k, v in values.items():
 180                                 if v != None:
 181                                         print >>fd, '%s=%s' % (k,v)
 182                                 else:
 183                                         print >>fd, k
 184                         print >>fd
 185                 fd.close()
 186
 187         def changeTo(self, file):
 188                 kdeconfig = self._parseKDEConfig()
 189                 #kdeconfig['Background Common']['DrawBackgroundPerScreen_0']='true'
 190                 for section in ('Desktop0', 'Desktop0Screen0'):
 191                         kdeconfig[section]['Wallpaper'] = file
 192                         kdeconfig[section]['UseSHM'] = 'true'
 193                         kdeconfig[section]['WallpaperMode'] = 'ScaleAndCrop'
 194                         # Ensure that random mode is disabled...
 195                         if 'MultiWallpaperMode' in kdeconfig[section]:
 196                                 del kdeconfig[section]['MultiWallpaperMode']
 197
 198                 self._writeKDEConfig(kdeconfig)
 199
 200                 return not subprocess.Popen(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'],
 201                            stdout=sys.stdout, stderr=sys.stderr, stdin=open('/dev/null', 'r')).wait()