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, filelist, 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                 self.filelist = filelist
  65                 # Used to 'chain' background changers
  66                 self.nextChanger = None
  67
  68         def callChained(self, filename):
  69                 if self.nextChanger is None:
  70                         return True
  71                 else:
  72                         return self.nextChanger.changeTo(filename)
  73
  74         def cycleNext(self):
  75                 file = self.filelist.getNextRandomImage()
  76                 return self.changeTo(file) and self.callChained(file)
  77
  78         def cyclePrev(self):
  79                 file = self.filelist.getPrevRandomImage()
  80                 return self.changeTo(file) and self.callChained(file)
  81
  82         def cycleReload(self):
  83                 file = self.filelist.getCurrentImage()
  84                 return self.changeTo(file) and self.callChained(file)
  85
  86
  87 class __WMakerChanger(__BaseChanger):
  88         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  89         def _removeOldImageCache(self):
  90                 """Cleans up any old temp images"""
  91                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  92                         os.mkdir(self._ConvertedWallpaperLocation)
  93                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  94                         for filename in filenames:
  95                                 os.unlink(os.path.join(fullpath, filename))
  96                         for dirname in dirnames:
  97                                 os.unlink(os.path.join(fullpath, dirname))
  98
  99         def _convertImageFormat(self, file):
 100                 """Convert the image to a png, and store it in a local place"""
 101                 self._removeOldImageCache()
 102                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 103                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
 104                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
 105                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 106         def changeTo(self, file):
 107                 file, convert_status = self._convertImageFormat(file)
 108                 if convert_status:
 109                         debug('Convert failed')
 110                 cmd = ["wmsetbg",
 111                         "-b", self.backgroundColour, # Sets the background colour to be what the user specified
 112                         "-S", # 'Smooth' (WTF?)
 113                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
 114 ###                     "-a", # scale the image, keeping the aspect ratio
 115                         "-u", # Force this to be the default background
 116                         "-d"  # dither
 117                         ]
 118                 if self.permanent:
 119                         cmd += ["-u"] # update the wmaker database
 120                 cmd += [file]
 121                 debug('''WMaker bgset command: "'%s'"''' % "' '".join(cmd), DEBUG_LEVEL_DEBUG)
 122                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 123
 124 class __OSXChanger(__BaseChanger):
 125         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 126         def _removeOldImageCache(self):
 127                 """Cleans up any old temp images"""
 128                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 129                         os.mkdir(self._ConvertedWallpaperLocation)
 130                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 131                         for filename in filenames:
 132                                 os.unlink(os.path.join(fullpath, filename))
 133                         for dirname in dirnames:
 134                                 os.unlink(os.path.join(fullpath, dirname))
 135
 136         def _convertImageFormat(self, file):
 137                 """Convert the image to a png, and store it in a local place"""
 138                 self._removeOldImageCache()
 139                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 140                 cmd = ["convert", file, output_name]
 141                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd), DEBUG_LEVEL_DEBUG)
 142                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 143
 144         def changeTo(self, file):
 145                 output_name, ret = self._convertImageFormat(file)
 146                 if ret: # Since 0 indicates success
 147                         debug("Convert failed %s" % ret)
 148                         return False
 149                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 150                 debug(cmd, DEBUG_LEVEL_DEBUG)
 151                 return not commands.getstatusoutput(cmd)[0]
 152
 153 class __GnomeChanger(__BaseChanger):
 154         def changeTo(self, file):
 155                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 156                 debug(cmd, DEBUG_LEVEL_DEBUG)
 157                 return subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 158
 159 class __KDEChanger(__BaseChanger):
 160         def changeTo(self, file):
 161                 cmds = []
 162                 for group in ('Desktop0', 'Desktop0Screen0'):
 163                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 164                         cmds.append(base + ['Wallpaper', file])
 165                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 166                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 167                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 168
 169                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 170                 for cmd in cmds:
 171                         debug(cmd, DEBUG_LEVEL_DEBUG)
 172                         if subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait() != 0:
 173                                 return 1 # Fail
 174
 175                 return 0 # Success
 176