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         info("Setting image: %s" % filename)
  17         for changer in changers:
  18                 if not changer.set_image(filename):
  19                         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         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         debug("Testing for KDE")
  39         if commands.getstatusoutput("xwininfo -name 'KDE Desktop'")[0] == 0:
  40                 changers.append(KDEChanger(*args, **kwargs))
  41
  42         debug("Testing for Gnome")
  43         if commands.getstatusoutput("xwininfo -name 'gnome-session'")[0] == 0:
  44                 changers.append(GnomeChanger(*args, **kwargs))
  45
  46         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):
  57                 info('Determined the window manager is "%s"' % self.name)
  58                 self.background_color = background_color
  59                 self.permanent = permanent
  60
  61         def set_image(self, filename):
  62                 raise NotImplementedError()
  63
  64 class WMakerChanger(BaseChanger):
  65         name = "WindowMaker"
  66         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  67         def remove_old_image_cache(self):
  68                 """Cleans up any old temp images"""
  69                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  70                         os.mkdir(self._ConvertedWallpaperLocation)
  71                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  72                         for filename in filenames:
  73                                 os.unlink(os.path.join(fullpath, filename))
  74                         for dirname in dirnames:
  75                                 os.unlink(os.path.join(fullpath, dirname))
  76
  77         def convert_image_format(self, file):
  78                 """Convert the image to a png, and store it in a local place"""
  79                 self.remove_old_image_cache()
  80                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
  81                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
  82                 debug("""Convert command: '"%s"'""" % '" "'.join(cmd))
  83                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
  84
  85         def set_image(self, file):
  86                 file, convert_status = self.convert_image_format(file)
  87                 if convert_status:
  88                         debug('Convert failed')
  89                 cmd = ["wmsetbg",
  90                         "-b", self.background_color, # Sets the background colour to be what the user specified
  91                         "-S", # 'Smooth' (WTF?)
  92                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
  93 ###                     "-a", # scale the image, keeping the aspect ratio
  94                         "-u", # Force this to be the default background
  95                         "-d"  # dither
  96                         ]
  97                 if self.permanent:
  98                         cmd += ["-u"] # update the wmaker database
  99                 cmd += [file]
 100                 debug('''WMaker bgset command: "'%s'"''' % "' '".join(cmd))
 101                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 102
 103 class OSXChanger(BaseChanger):
 104         name = "Mac OS X"
 105         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 106         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 107
 108         def remove_old_image_cache(self):
 109                 """Cleans up any old temp images"""
 110                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 111                         os.mkdir(self._ConvertedWallpaperLocation)
 112                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 113                         for filename in filenames:
 114                                 os.unlink(os.path.join(fullpath, filename))
 115                         for dirname in dirnames:
 116                                 os.unlink(os.path.join(fullpath, dirname))
 117
 118         def convert_image_format(self, file):
 119                 """Convert the image to a png, and store it in a local place"""
 120                 self.remove_old_image_cache()
 121                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 122                 try:
 123                         import PIL, PIL.Image
 124                         img = PIL.Image.open(file)
 125                         img.save(output_name, "PNG")
 126                         return output_name, True
 127                 except ImportError:
 128                         debug('Could not load PIL, going to try just copying the image')
 129                         import shutil
 130                         output_name = os.path.join(self._ConvertedWallpaperLocation, os.path.basename(file))
 131                         shutil.copyfile(file, output_name)
 132                         return output_name, True
 133
 134         def fix_desktop_plist(self):
 135                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 136                 try:
 137                         import Foundation
 138                         desktop_plist = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 139                         # Remove all but the 'default' entry
 140                         for k in desktop_plist['Background'].keys():
 141                                 if k == 'default':
 142                                         continue
 143                                 desktop_plist['Background'].removeObjectForKey_(k)
 144                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 145                         desktop_plist.writeToFile_atomically_(self._DesktopPlistLocation, True)
 146                 except ImportError:
 147                         debug('Could not import the Foundation module, you may have problems with dual screens')
 148
 149         def set_image(self, file):
 150                 output_name, ret = self.convert_image_format(file)
 151                 if not ret:
 152                         debug("Convert failed")
 153                         return False
 154                 self.fix_desktop_plist()
 155                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % output_name
 156                 debug(cmd)
 157                 return not commands.getstatusoutput(cmd)[0]
 158
 159 class GnomeChanger(BaseChanger):
 160         name = "Gnome"
 161         def set_image(self, file):
 162                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 163                 debug(cmd)
 164                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 165
 166 class KDEChanger(BaseChanger):
 167         name = "KDE"
 168         def set_image(self, file):
 169                 cmds = []
 170                 for group in ('Desktop0', 'Desktop0Screen0'):
 171                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 172                         cmds.append(base + ['Wallpaper', file])
 173                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 174                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 175                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 176
 177                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 178                 for cmd in cmds:
 179                         debug(cmd)
 180                         if subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait() != 0:
 181                                 return False
 182
 183                 return True
 184
 185
 186 def main(filename):
 187         import logging
 188         logging.basicConfig(level=logging.DEBUG, format="%(levelname)s: %(message)s")
 189         init()
 190         set_image(filename)
 191
 192 if __name__ == "__main__":
 193         try:
 194                 filename = sys.argv[1]
 195         except:
 196                 print >>sys.stderr, "Usage: %s filename" % sys.argv[0]
 197                 sys.exit(1)
 198
 199         main(filename)
 200
 201