code.delx.au - bg-scripts/blob - bin/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, subprocess, time
   8 from logging import debug, info, warning
   9
  10 __all__ = ("init", "set_image")
  11
  12
  13 changers = []
  14
  15 def set_image(filename):
  16         for changer in changers:
  17                 if not changer.set_image(filename):
  18                         warning("Failed to set background: wallchanger.set_image(%s), changer=%s" % (filename, changer))
  19
  20 def init(*args, **kwargs):
  21         """Desktop Changer factory"""
  22
  23         debug("Testing for OSX (NonX11)")
  24         if commands.getstatusoutput("ps ax -o command -c|grep -q WindowServer")[0] == 0:
  25                 changers.append(OSXChanger(*args, **kwargs))
  26
  27         if 'DISPLAY' not in os.environ or os.environ['DISPLAY'].startswith('/tmp/launch'):
  28                 # X11 is not running
  29                 return
  30         else:
  31                 if os.uname()[0] == 'Darwin':
  32                         # Try to detect if the X11 server is running on OSX
  33                         if commands.getstatusoutput("ps ax -o command|grep -q '/.*X11 .* %s'" % os.environ['DISPLAY'])[0] != 0:
  34                                 # X11 is not running for this display
  35                                 return
  36
  37         debug("Testing for KDE")
  38         if commands.getstatusoutput("xwininfo -name 'KDE Desktop'")[0] == 0:
  39                 changers.append(KDEChanger(*args, **kwargs))
  40
  41         debug("Testing for Gnome")
  42         if commands.getstatusoutput("xwininfo -name 'gnome-session'")[0] == 0:
  43                 changers.append(GnomeChanger(*args, **kwargs))
  44
  45         debug("Testing for WMaker")
  46         if commands.getstatusoutput("xlsclients | grep -qi wmaker")[0] == 0:
  47                 changers.append(WMakerChanger(*args, **kwargs))
  48
  49         if len(changers) == 0:
  50                 raise Exception("Unknown window manager")
  51
  52
  53 class BaseChanger(object):
  54         name = "undefined"
  55         def __init__(self, background_color='black', permanent=False):
  56                 info('Determined the window manager is "%s"' % self.name)
  57                 self.background_color = background_color
  58                 self.permanent = permanent
  59
  60         def set_image(self, filename):
  61                 raise NotImplementedError()
  62
  63 class WMakerChanger(BaseChanger):
  64         name = "WindowMaker"
  65         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  66         def remove_old_image_cache(self):
  67                 """Cleans up any old temp images"""
  68                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  69                         os.mkdir(self._ConvertedWallpaperLocation)
  70                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  71                         for filename in filenames:
  72                                 os.unlink(os.path.join(fullpath, filename))
  73                         for dirname in dirnames:
  74                                 os.unlink(os.path.join(fullpath, dirname))
  75
  76         def convert_image_format(self, file):
  77                 """Convert the image to a png, and store it in a local place"""
  78                 self.remove_old_image_cache()
  79                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
  80                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
  81                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd))
  82                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
  83
  84         def set_image(self, file):
  85                 file, convert_status = self.convert_image_format(file)
  86                 if convert_status:
  87                         debug('Convert failed')
  88                 cmd = ["wmsetbg",
  89                         "-b", self.background_color, # Sets the background colour to be what the user specified
  90                         "-S", # 'Smooth' (WTF?)
  91                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
  92 ###                     "-a", # scale the image, keeping the aspect ratio
  93                         "-u", # Force this to be the default background
  94                         "-d"  # dither
  95                         ]
  96                 if self.permanent:
  97                         cmd += ["-u"] # update the wmaker database
  98                 cmd += [file]
  99                 debug('''WMaker bgset command: "'%s'"''' % "' '".join(cmd))
 100                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 101
 102 class OSXChanger(BaseChanger):
 103         name = "Mac OS X"
 104         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 105         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 106
 107         def remove_old_image_cache(self):
 108                 """Cleans up any old temp images"""
 109                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 110                         os.mkdir(self._ConvertedWallpaperLocation)
 111                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 112                         for filename in filenames:
 113                                 os.unlink(os.path.join(fullpath, filename))
 114                         for dirname in dirnames:
 115                                 os.unlink(os.path.join(fullpath, dirname))
 116
 117         def convert_image_format(self, file):
 118                 """Convert the image to a png, and store it in a local place"""
 119                 self.remove_old_image_cache()
 120                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 121                 try:
 122                         import PIL, PIL.Image
 123                         img = PIL.Image.open(file)
 124                         img.save(output_name, "PNG")
 125                         return output_name, True
 126                 except ImportError:
 127                         debug('Could not load PIL, going to try just copying the image')
 128                         import shutil
 129                         output_name = os.path.join(self._ConvertedWallpaperLocation, os.path.basename(file))
 130                         shutil.copyfile(file, output_name)
 131                         return output_name, True
 132
 133         def fix_desktop_plist(self):
 134                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 135                 try:
 136                         import Foundation
 137                         desktop_plist = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 138                         # Remove all but the 'default' entry
 139                         for k in desktop_plist['Background'].keys():
 140                                 if k == 'default':
 141                                         continue
 142                                 desktop_plist['Background'].removeObjectForKey_(k)
 143                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 144                         desktop_plist.writeToFile_atomically_(self._DesktopPlistLocation, True)
 145                 except ImportError:
 146                         debug('Could not import the Foundation module, you may have problems with dual screens')
 147
 148         def set_image(self, file):
 149                 output_name, ret = self.convert_image_format(file)
 150                 if not ret:
 151                         debug("Convert failed")
 152                         return False
 153                 self.fix_desktop_plist()
 154                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 155                 debug(cmd)
 156                 return not commands.getstatusoutput(cmd)[0]
 157
 158 class GnomeChanger(BaseChanger):
 159         name = "Gnome"
 160         def set_image(self, file):
 161                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 162                 debug(cmd)
 163                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 164
 165 class KDEChanger(BaseChanger):
 166         name = "KDE"
 167         def set_image(self, file):
 168                 cmds = []
 169                 for group in ('Desktop0', 'Desktop0Screen0'):
 170                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 171                         cmds.append(base + ['Wallpaper', file])
 172                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 173                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 174                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 175
 176                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 177                 for cmd in cmds:
 178                         debug(cmd)
 179                         if subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait() != 0:
 180                                 return False
 181
 182                 return True
 183
 184
 185 def main(filename):
 186         import logging
 187         logging.basicConfig(level=logging.DEBUG, format="%(levelname)s: %(message)s")
 188         init()
 189         set_image(filename)
 190
 191 if __name__ == "__main__":
 192         try:
 193                 filename = sys.argv[1]
 194         except:
 195                 print >>sys.stderr, "Usage: %s filename" % sys.argv[0]
 196                 sys.exit(1)
 197
 198         main(filename)
 199
 200