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 def RandomBG(*args, **kwargs):
  15         """Desktop Changer factory"""
  16
  17         ret = None
  18
  19         debug("Testing for OSX (NonX11)", DEBUG_LEVEL_LOW)
  20         if commands.getstatusoutput("ps ax -o command -c|grep -q WindowServer")[0] == 0:
  21                 ret = __OSXChanger(*args, **kwargs)
  22
  23         if 'DISPLAY' not in os.environ or os.environ['DISPLAY'].startswith('/tmp/launch'):
  24                 # X11 is not running
  25                 return ret
  26         else:
  27                 if os.uname()[0] == 'Darwin':
  28                         # Try to detect if the X11 server is running on OSX
  29                         if commands.getstatusoutput("ps ax -o command|grep -q '/.*X11 .* %s'" % os.environ['DISPLAY'])[0] != 0:
  30                                 # X11 is not running for this display
  31                                 return ret
  32
  33         debug("Testing for KDE", DEBUG_LEVEL_LOW)
  34         if commands.getstatusoutput("xwininfo -name 'KDE Desktop'")[0] == 0:
  35                 if ret is not None:
  36                         ret.nextChanger = __KDEChanger(*args, **kwargs)
  37                 else:
  38                         ret = __KDEChanger(*args, **kwargs)
  39
  40         debug("Testing for Gnome", DEBUG_LEVEL_LOW)
  41         if commands.getstatusoutput("xwininfo -name 'gnome-session'")[0] == 0:
  42                 if ret is not None:
  43                         ret.nextChanger = __GnomeChanger(*args, **kwargs)
  44                 else:
  45                         ret = __GnomeChanger(*args, **kwargs)
  46
  47         debug("Testing for WMaker", DEBUG_LEVEL_LOW)
  48         if commands.getstatusoutput("xlsclients | grep -qi wmaker")[0] == 0:
  49                 if ret is not None:
  50                         ret.nextChanger = __WMakerChanger(*args, **kwargs)
  51                 else:
  52                         ret = __WMakerChanger(*args, **kwargs)
  53
  54         if ret is None:
  55                 raise Exception("Unknown window manager")
  56         else:
  57                 return ret
  58
  59 class __BaseChanger(object):
  60         def __init__(self, backgroundColour='black', permanent=False):
  61                 debug('Determined the window manager is "%s"' % self.__class__.__name__, DEBUG_LEVEL_MEDIUM)
  62                 self.backgroundColour = backgroundColour
  63                 self.permanent = permanent
  64                 # Used to 'chain' background changers
  65                 self.nextChanger = None
  66
  67         def setImage(self, filename):
  68                 self._setImage(filename)
  69                 if self.nextChanger is not None:
  70                         self.nextChange.changeTo(filename)
  71
  72 class __WMakerChanger(__BaseChanger):
  73         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  74         def _removeOldImageCache(self):
  75                 """Cleans up any old temp images"""
  76                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  77                         os.mkdir(self._ConvertedWallpaperLocation)
  78                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  79                         for filename in filenames:
  80                                 os.unlink(os.path.join(fullpath, filename))
  81                         for dirname in dirnames:
  82                                 os.unlink(os.path.join(fullpath, dirname))
  83
  84         def _convertImageFormat(self, file):
  85                 """Convert the image to a png, and store it in a local place"""
  86                 self._removeOldImageCache()
  87                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
  88                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
  89                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
  90                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
  91
  92         def _setImage(self, file):
  93                 file, convert_status = self._convertImageFormat(file)
  94                 if convert_status:
  95                         debug('Convert failed')
  96                 cmd = ["wmsetbg",
  97                         "-b", self.backgroundColour, # Sets the background colour to be what the user specified
  98                         "-S", # 'Smooth' (WTF?)
  99                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
 100 ###                     "-a", # scale the image, keeping the aspect ratio
 101                         "-u", # Force this to be the default background
 102                         "-d"  # dither
 103                         ]
 104                 if self.permanent:
 105                         cmd += ["-u"] # update the wmaker database
 106                 cmd += [file]
 107                 debug('''WMaker bgset command: "'%s'"''' % "' '".join(cmd), DEBUG_LEVEL_DEBUG)
 108                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 109
 110 class __OSXChanger(__BaseChanger):
 111         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 112         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 113
 114         def _removeOldImageCache(self):
 115                 """Cleans up any old temp images"""
 116                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 117                         os.mkdir(self._ConvertedWallpaperLocation)
 118                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 119                         for filename in filenames:
 120                                 os.unlink(os.path.join(fullpath, filename))
 121                         for dirname in dirnames:
 122                                 os.unlink(os.path.join(fullpath, dirname))
 123
 124         def _convertImageFormat(self, file):
 125                 """Convert the image to a png, and store it in a local place"""
 126                 self._removeOldImageCache()
 127                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 128                 try:
 129                         import PIL, PIL.Image
 130                         img = PIL.Image.open(file)
 131                         img.save(output_name, "PNG")
 132                         return output_name, True
 133                 except ImportError:
 134                         debug('Could not load PIL, going to try just copying the image')
 135                         import shutil
 136                         output_name = os.path.join(self._ConvertedWallpaperLocation, os.path.basename(file))
 137                         shutil.copyfile(file, output_name)
 138                         return output_name, True
 139
 140         def _fixDesktopPList(self):
 141                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 142                 try:
 143                         import Foundation
 144                         desktopPList = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 145                         # Remove all but the 'default' entry
 146                         for k in desktopPList['Background'].keys():
 147                                 if k == 'default':
 148                                         continue
 149                                 desktopPList['Background'].removeObjectForKey_(k)
 150                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 151                         desktopPList.writeToFile_atomically_(self._DesktopPlistLocation, True)
 152                 except ImportError:
 153                         debug('Could not import the Foundation module, you may have problems with dual screens', DEBUG_LEVEL_MEDIUM)
 154
 155         def _setImage(self, file):
 156                 output_name, ret = self._convertImageFormat(file)
 157                 if not ret:
 158                         debug("Convert failed")
 159                         return False
 160                 self._fixDesktopPList()
 161                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 162                 debug(cmd, DEBUG_LEVEL_DEBUG)
 163                 return not commands.getstatusoutput(cmd)[0]
 164
 165 class __GnomeChanger(__BaseChanger):
 166         def _setImage(self, file):
 167                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 168                 debug(cmd, DEBUG_LEVEL_DEBUG)
 169                 return subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 170
 171 class __KDEChanger(__BaseChanger):
 172         def _setImage(self, file):
 173                 cmds = []
 174                 for group in ('Desktop0', 'Desktop0Screen0'):
 175                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 176                         cmds.append(base + ['Wallpaper', file])
 177                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 178                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 179                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 180
 181                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 182                 for cmd in cmds:
 183                         debug(cmd, DEBUG_LEVEL_DEBUG)
 184                         if subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait() != 0:
 185                                 return 1 # Fail
 186
 187                 return 0 # Success
 188