code.delx.au - bg-scripts/blob - wallchanger.py

   1 #!/usr/bin/env python
   2 # Copyright 2008 Greg Darke <greg@tsukasa.net.au>
   3 # Copyright 2008 James Bunton <jamesbunton@fastmail.fm>
   4 # Licensed for distribution under the GPL version 2, check COPYING for details
   5 # This is a cross platform/cross window manager way to change your wallpaper
   6
   7 import commands, sys, os, os.path, time
   8 import logging
   9
  10 __all__ = ("init", "set_image")
  11
  12
  13 changers = []
  14
  15 def set_image(filename):
  16         logging.info("Setting image: %s", filename)
  17         for changer in changers:
  18                 if not changer.set_image(filename):
  19                         logging.warning("Failed to set background: wallchanger.set_image(%s), changer=%s", filename, changer)
  20
  21 def init(*args, **kwargs):
  22         """Desktop Changer factory"""
  23
  24         logging.debug("Testing for OSX (NonX11)")
  25         if commands.getstatusoutput("ps ax -o command -c|grep -q WindowServer")[0] == 0:
  26                 changers.append(OSXChanger(*args, **kwargs))
  27
  28         if 'DISPLAY' not in os.environ or os.environ['DISPLAY'].startswith('/tmp/launch'):
  29                 # X11 is not running
  30                 return
  31         else:
  32                 if os.uname()[0] == 'Darwin':
  33                         # Try to detect if the X11 server is running on OSX
  34                         if commands.getstatusoutput("ps ax -o command|grep -q '^/.*X11 .* %s'" % os.environ['DISPLAY'])[0] != 0:
  35                                 # X11 is not running for this display
  36                                 return
  37
  38         logging.debug("Testing for KDE")
  39         if commands.getstatusoutput("xwininfo -name 'KDE Desktop'")[0] == 0:
  40                 changers.append(KDEChanger(*args, **kwargs))
  41
  42         logging.debug("Testing for Gnome")
  43         if commands.getstatusoutput("xwininfo -name 'gnome-session'")[0] == 0:
  44                 changers.append(GnomeChanger(*args, **kwargs))
  45
  46         logging.debug("Testing for WMaker")
  47         if commands.getstatusoutput("xlsclients | grep -qi wmaker")[0] == 0:
  48                 changers.append(WMakerChanger(*args, **kwargs))
  49
  50         if len(changers) == 0:
  51                 raise Exception("Unknown window manager")
  52
  53
  54 class BaseChanger(object):
  55         name = "undefined"
  56         def __init__(self, background_color='black', permanent=False, convert=False):
  57                 logging.info('Determined the window manager is "%s"', self.name)
  58                 self.background_color = background_color
  59                 self.permanent = permanent
  60                 self.convert = convert
  61
  62                 try:
  63                         import subprocess
  64                 except ImportError:
  65                         self._runProgram = self._runProgram_command
  66                 else:
  67                         self._runProgram = self._runProgram_subprocess
  68
  69         def _runProgram_subprocess(self, cmd):
  70                 import subprocess
  71                 return subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
  72
  73         # A simple implementation of subprocess for python2.4
  74         def _runProgram_command(self, cmd):
  75                 """Runs a program given in cmd"""
  76                 return os.spawnvp(os.P_WAIT, cmd[0], cmd)
  77
  78         def set_image(self, filename):
  79                 raise NotImplementedError()
  80
  81 class WMakerChanger(BaseChanger):
  82         name = "WindowMaker"
  83         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  84         def remove_old_image_cache(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 convert_image_format(self, file):
  95                 """Convert the image to a png, and store it in a local place"""
  96                 self.remove_old_image_cache()
  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                 logging.debug("""Convert command: '"%s"'""", '" "'.join(cmd))
 100                 return output_name, self._runProgram(cmd)
 101
 102         def set_image(self, file):
 103                 if self.convert:
 104                         file, convert_status = self.convert_image_format(file)
 105                         if convert_status:
 106                                 logging.debug('Convert failed')
 107                 cmd = ["wmsetbg",
 108                         "-b", self.background_color, # Sets the background colour to be what the user specified
 109                         "-S", # 'Smooth' (WTF?)
 110                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
 111 ###                     "-a", # scale the image, keeping the aspect ratio
 112                         "-u", # Force this to be the default background
 113                         "-d"  # dither
 114                         ]
 115                 if self.permanent:
 116                         cmd += ["-u"] # update the wmaker database
 117                 cmd += [file]
 118                 logging.debug('''WMaker bgset command: "'%s'"''', "' '".join(cmd))
 119                 return not self._runProgram(cmd)
 120
 121 class OSXChanger(BaseChanger):
 122         name = "Mac OS X"
 123         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 124         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 125
 126         def __init__(self, *args, **kwargs):
 127                 BaseChanger.__init__(self, *args, **kwargs)
 128
 129         def remove_old_image_cache(self):
 130                 """Cleans up any old temp images"""
 131                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 132                         os.mkdir(self._ConvertedWallpaperLocation)
 133                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 134                         for filename in filenames:
 135                                 os.unlink(os.path.join(fullpath, filename))
 136                         for dirname in dirnames:
 137                                 os.unlink(os.path.join(fullpath, dirname))
 138
 139         def convert_image_format(self, file):
 140                 """Convert the image to a png, and store it in a local place"""
 141                 self.remove_old_image_cache()
 142                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 143                 try:
 144                         import PIL, PIL.Image
 145                         img = PIL.Image.open(file)
 146                         img.save(output_name, "PNG")
 147                         return output_name, True
 148                 except ImportError:
 149                         logging.debug('Could not load PIL, going to try just copying the image')
 150                         import shutil
 151                         output_name = os.path.join(self._ConvertedWallpaperLocation, os.path.basename(file))
 152                         shutil.copyfile(file, output_name)
 153                         return output_name, True
 154
 155         def fix_desktop_plist(self):
 156                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 157                 try:
 158                         import Foundation
 159                         desktop_plist = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 160                         # Remove all but the 'default' entry
 161                         for k in desktop_plist['Background'].keys():
 162                                 if k == 'default':
 163                                         continue
 164                                 desktop_plist['Background'].removeObjectForKey_(k)
 165                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 166                         desktop_plist.writeToFile_atomically_(self._DesktopPlistLocation, True)
 167                 except ImportError:
 168                         logging.debug('Could not import the Foundation module, you may have problems with dual screens')
 169
 170         def set_image(self, filename):
 171                 self.fix_desktop_plist()
 172                 if self.convert:
 173                         filename, ret = self.convert_image_format(filename)
 174                         if not ret:
 175                                 logging.debug("Convert failed")
 176                                 return False
 177                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % filename
 178                 logging.debug(cmd)
 179                 return not commands.getstatusoutput(cmd)[0]
 180
 181 class GnomeChanger(BaseChanger):
 182         name = "Gnome"
 183         def set_image(self, file):
 184                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 185                 logging.debug(cmd)
 186                 return not self._runProgram(cmd)
 187
 188 class KDEChanger(BaseChanger):
 189         name = "KDE"
 190         def set_image(self, file):
 191                 cmds = []
 192                 for group in ('Desktop0', 'Desktop0Screen0'):
 193                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 194                         cmds.append(base + ['Wallpaper', file])
 195                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 196                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 197                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 198
 199                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 200                 for cmd in cmds:
 201                         logging.debug(cmd)
 202                         if self._runProgram(cmd) != 0:
 203                                 return False
 204
 205                 return True
 206
 207
 208 def main(filename):
 209         logging.basicConfig(level=logging.DEBUG, format="%(levelname)s: %(message)s")
 210         init()
 211         set_image(filename)
 212
 213 if __name__ == "__main__":
 214         try:
 215                 filename = sys.argv[1]
 216         except:
 217                 print >>sys.stderr, "Usage: %s filename" % sys.argv[0]
 218                 sys.exit(1)
 219
 220         main(filename)
 221
 222