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, subprocess, 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         def set_image(self, filename):
  63                 raise NotImplementedError()
  64
  65 class WMakerChanger(BaseChanger):
  66         name = "WindowMaker"
  67         _ConvertedWallpaperLocation = '/tmp/wallpapers_wmaker/'
  68         def remove_old_image_cache(self):
  69                 """Cleans up any old temp images"""
  70                 if not os.path.isdir(self._ConvertedWallpaperLocation):
  71                         os.mkdir(self._ConvertedWallpaperLocation)
  72                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
  73                         for filename in filenames:
  74                                 os.unlink(os.path.join(fullpath, filename))
  75                         for dirname in dirnames:
  76                                 os.unlink(os.path.join(fullpath, dirname))
  77
  78         def convert_image_format(self, file):
  79                 """Convert the image to a png, and store it in a local place"""
  80                 self.remove_old_image_cache()
  81                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
  82                 cmd = ["convert", '-resize', '1280', '-gravity', 'Center', '-crop', '1280x800+0+0', file, output_name]
  83                 logging.debug("""Convert command: '"%s"'""", '" "'.join(cmd))
  84                 return output_name, subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
  85
  86         def set_image(self, file):
  87                 if self.convert:
  88                         file, convert_status = self.convert_image_format(file)
  89                         if convert_status:
  90                                 logging.debug('Convert failed')
  91                 cmd = ["wmsetbg",
  92                         "-b", self.background_color, # Sets the background colour to be what the user specified
  93                         "-S", # 'Smooth' (WTF?)
  94                         "-e", # Center the image on the screen (only affects when the image in no the in the correct aspect ratio
  95 ###                     "-a", # scale the image, keeping the aspect ratio
  96                         "-u", # Force this to be the default background
  97                         "-d"  # dither
  98                         ]
  99                 if self.permanent:
 100                         cmd += ["-u"] # update the wmaker database
 101                 cmd += [file]
 102                 logging.debug('''WMaker bgset command: "'%s'"''', "' '".join(cmd))
 103                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 104
 105 class OSXChanger(BaseChanger):
 106         name = "Mac OS X"
 107         _ConvertedWallpaperLocation = '/tmp/wallpapers/'
 108         _DesktopPlistLocation = os.path.expanduser('~/Library/Preferences/com.apple.desktop.plist')
 109
 110         def __init__(self, *args, **kwargs):
 111                 BaseChanger.__init__(self, *args, **kwargs)
 112
 113         def remove_old_image_cache(self):
 114                 """Cleans up any old temp images"""
 115                 if not os.path.isdir(self._ConvertedWallpaperLocation):
 116                         os.mkdir(self._ConvertedWallpaperLocation)
 117                 for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
 118                         for filename in filenames:
 119                                 os.unlink(os.path.join(fullpath, filename))
 120                         for dirname in dirnames:
 121                                 os.unlink(os.path.join(fullpath, dirname))
 122
 123         def convert_image_format(self, file):
 124                 """Convert the image to a png, and store it in a local place"""
 125                 self.remove_old_image_cache()
 126                 output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.png' % time.time())
 127                 try:
 128                         import PIL, PIL.Image
 129                         img = PIL.Image.open(file)
 130                         img.save(output_name, "PNG")
 131                         return output_name, True
 132                 except ImportError:
 133                         logging.debug('Could not load PIL, going to try just copying the image')
 134                         import shutil
 135                         output_name = os.path.join(self._ConvertedWallpaperLocation, os.path.basename(file))
 136                         shutil.copyfile(file, output_name)
 137                         return output_name, True
 138
 139         def fix_desktop_plist(self):
 140                 """Removes the entry in the desktop plist file that specifies the wallpaper for each monitor"""
 141                 try:
 142                         import Foundation
 143                         desktop_plist = Foundation.NSMutableDictionary.dictionaryWithContentsOfFile_(self._DesktopPlistLocation)
 144                         # Remove all but the 'default' entry
 145                         for k in desktop_plist['Background'].keys():
 146                                 if k == 'default':
 147                                         continue
 148                                 desktop_plist['Background'].removeObjectForKey_(k)
 149                         # Store the plist again (Make sure we write it out atomically -- Don't want to break finder)
 150                         desktop_plist.writeToFile_atomically_(self._DesktopPlistLocation, True)
 151                 except ImportError:
 152                         logging.debug('Could not import the Foundation module, you may have problems with dual screens')
 153
 154         def set_image(self, filename):
 155                 self.fix_desktop_plist()
 156                 if self.convert:
 157                         filename, ret = self.convert_image_format(filename)
 158                         if not ret:
 159                                 logging.debug("Convert failed")
 160                                 return False
 161                 cmd = """osascript -e 'tell application "finder" to set desktop picture to posix file "%s"'""" % filename
 162                 logging.debug(cmd)
 163                 return not commands.getstatusoutput(cmd)[0]
 164
 165 class GnomeChanger(BaseChanger):
 166         name = "Gnome"
 167         def set_image(self, file):
 168                 cmd = ['gconftool-2', '--type', 'string', '--set', '/desktop/gnome/background/picture_filename', file]
 169                 logging.debug(cmd)
 170                 return not subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait()
 171
 172 class KDEChanger(BaseChanger):
 173         name = "KDE"
 174         def set_image(self, file):
 175                 cmds = []
 176                 for group in ('Desktop0', 'Desktop0Screen0'):
 177                         base = ['kwriteconfig', '--file', 'kdesktoprc', '--group', group, '--key']
 178                         cmds.append(base + ['Wallpaper', file])
 179                         cmds.append(base + ['UseSHM', '--type', 'bool', 'true'])
 180                         cmds.append(base + ['WallpaperMode', 'ScaleAndCrop'])
 181                         cmds.append(base + ['MultiWallpaperMode', 'NoMulti'])
 182
 183                 cmds.append(['dcop', 'kdesktop', 'KBackgroundIface', 'configure'])
 184                 for cmd in cmds:
 185                         logging.debug(cmd)
 186                         if subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, stdin=None).wait() != 0:
 187                                 return False
 188
 189                 return True
 190
 191
 192 def main(filename):
 193         logging.basicConfig(level=logging.DEBUG, format="%(levelname)s: %(message)s")
 194         init()
 195         set_image(filename)
 196
 197 if __name__ == "__main__":
 198         try:
 199                 filename = sys.argv[1]
 200         except:
 201                 print >>sys.stderr, "Usage: %s filename" % sys.argv[0]
 202                 sys.exit(1)
 203
 204         main(filename)
 205
 206