-#! /usr/local/bin/python -O
-"""Select a random image from $HOME/lib/xsetbg/images subdirectories
-and set it as the desktop wallpaper (display it in the root window).
+#! /usr/bin/env python
+"""Set a random background image (XWin)
+
+Select a random image from a (list of) directory(s)
+and set it as the desktop wallpaper (display it in the root window)
+using xli program.
-Author: Oleg BroytMann <phd@phd.pp.ru>
-Copyright (C) 2000-2006 PhiloSoft Design
"""
__version__ = "$Revision$"[11:-2]
-__author__ = "Oleg BroytMann <phd@phd.pp.ru>"
-__copyright__ = "Copyright (C) 2000-2006 PhiloSoft Design"
-__date__ = "$Date$"[7:-2]
__revision__ = "$Id$"[5:-2]
+__date__ = "$Date$"[7:-2]
+
+__author__ = "Oleg Broytman <phd@phdru.name>"
+__copyright__ = "Copyright (C) 2000-2010 PhiloSoft Design"
+__license__ = "GNU GPL"
import sys, os
+from ConfigParser import SafeConfigParser
+import anydbm
+import random
+import shelve
+import subprocess
+from time import time
+from fcntl import flock, LOCK_EX, LOCK_UN, LOCK_NB
+
+from wsgiref import simple_server
+from wsgiref.handlers import SimpleHandler
+from wsgiref.simple_server import WSGIServer, make_server
+simple_server.ServerHandler = SimpleHandler # Stop logging to stdout
-def usage():
- sys.stderr.write("%s version %s\n" % (sys.argv[0], __version__))
- sys.stderr.write("Usage: %s [force]\n" % sys.argv[0])
- sys.exit(0)
def error(error_str, error_code=1):
sys.stderr.write("%s: Error: %s\n" % (sys.argv[0], error_str))
sys.exit(error_code)
-xwininfo = os.popen("xwininfo -root", 'r')
-xwininfo_lines = xwininfo.read()
-rc = xwininfo.close()
-if rc:
- error("calling xwininfo", rc)
-
-screen_width = None
-screen_height = None
-for line in xwininfo_lines.split('\n'):
- line = line.strip()
- if line.startswith("Width: "):
- screen_width = int(line[len("Width: "):])
- elif line.startswith("Height: "):
- screen_height = int(line[len("Height: "):])
-
-if not screen_width or not screen_height:
- error("parsing xwininfo output")
-
-
-from ConfigParser import SafeConfigParser
-
-xsetbg_dir = os.path.join(os.environ["HOME"], "lib", "xsetbg")
+xsetbg_dir = os.path.dirname(os.path.abspath(__file__))
os.chdir(xsetbg_dir)
config = SafeConfigParser()
else:
min_delay = 3600*24 # 24 hours
+# httpd settings
+if config.has_option("httpd", "host"):
+ host = config.get("httpd", "host")
+else:
+ host = 'localhost'
+
+if config.has_option("httpd", "port"):
+ port = config.getint("httpd", "port")
+else:
+ error("Config must specify a port to listen. Abort.")
+
del config
global_db_name = "xsetbg.db"
-import random
-import anydbm, shelve
-from time import time
-from fcntl import flock, LOCK_EX, LOCK_UN, LOCK_NB
+# DB keys
+timestamp_key = "timestamp"
+filename_key = "filename"
+old_filename_key = "old_filename"
+
-# Import pickle and all anydbm/shelve internal machinery, so that
-# when ReadyExec forks they will be ready.
-# Also create the database if it is not exists yet.
+# Create the database if it is not exists yet.
try:
global_db = shelve.open(global_db_name, flag='c')
os.remove(global_db_name)
global_db = shelve.open(global_db_name, flag='c')
-global_db.close() # Close DB in parent process
+# Remove old filenames
+old_time = time() - min_delay
+to_delete = [timestamp_key]
+for key in global_db.keys():
+ if key.startswith('/') and global_db[key] < old_time:
+ to_delete.append(key)
-# DB keys
-timestamp_key = "timestamp"
-filename_key = "filename"
-old_filename_key = "old_filename"
+for key in to_delete:
+ try:
+ del global_db[key]
+ except KeyError:
+ pass
+
+global_db.close() # Close DB in the parent process
images = []
error("No images found. Abort.")
-try:
- from PIL import Image
- use_PIL = True
-except ImportError:
- use_PIL = False
-
-
-def run():
- if len(sys.argv) not in (1, 2):
- usage()
-
- force = False
- if len(sys.argv) == 2:
- if sys.argv[1] == "force":
- force = True
- else:
- usage()
+def published(func):
+ func._wsgi_published = True
+ return func
+@published
+def ping(force=False):
# Use the program's file as the lock file:
# lock it to prevent two processes run in parallel.
lock_file = open("xsetbg.py", 'r')
try:
- flock(lock_file , LOCK_EX|LOCK_NB)
+ flock(lock_file, LOCK_EX|LOCK_NB)
except IOError: # already locked
lock_file.close()
return
global_db = None
try:
- # Re-seed the RNG; this is neccessary because ReadyExecd forks
- # and RNG in a child process got the same seed from the parent
- # after every fork.
- random.seed()
-
# Reopen the global persistent dictionary
global_db = shelve.open(global_db_name, 'w')
break
global_db[image_name] = current_time
- border = random.choice(borders)
- root, ext = os.path.splitext(image_name)
-
# Save filename
if global_db.has_key(filename_key):
global_db[old_filename_key] = global_db[filename_key]
global_db[filename_key] = image_name
- placement_options = []
- if use_PIL:
- image = Image.open(image_name, 'r')
- im_w, im_h = image.size
- del image
- if (im_w > screen_width) or (im_h > screen_height):
- zoom = min(screen_width*100//im_w, screen_height*100//im_h)
- if zoom > 0: placement_options = ["-zoom", str(zoom)]
+ program_options = ["xli", "-onroot", "-quiet"] + \
+ ["-center", "-border", random.choice(borders), "-zoom", "auto",
+ image_name]
+
+ rc = subprocess.call(program_options)
+ if rc:
+ error("cannot execute xli!")
finally:
# Unlock and close the lock file
- flock(lock_file , LOCK_UN)
+ flock(lock_file, LOCK_UN)
lock_file.close()
# Flush and close the global persistent dictionary
if global_db: global_db.close()
-
- if ext.lower() in (".bmp", ".png"):
- # xsetbg does not recognize BMP files.
- # PNG files have gamma settings, and xli can adapt it to the display gamma;
- # xloadimage/xview/xsetbg display them with wrong gamma.
- program_options = ["xli", "xli", "-onroot", "-quiet"] + placement_options + \
- ["-center", "-border", border, image_name]
- os.execlp(*program_options)
- error("cannot execute xli!")
- else:
- # ...but xli failed to load many image types, use xsetbg for them
- program_options = ["xsetbg", "xsetbg"] + placement_options + \
- ["-center", "-border", border, image_name]
- os.execlp(*program_options)
- error("cannot execute xsetbg!")
-
-
-if __name__ == "__main__":
- run()
+@published
+def force():
+ ping(force=True)
+
+@published
+def stop():
+ QuitWSGIServer._quit_flag = True
+
+
+g = globals().copy()
+commands = dict([(name, g[name]) for name in g
+ if getattr(g[name], '_wsgi_published', False)])
+del g
+
+class QuitWSGIServer(WSGIServer):
+ _quit_flag = False
+
+ def serve_forever(self):
+ while not self._quit_flag:
+ self.handle_request()
+
+def app(env, start_response):
+ command = env['PATH_INFO'][1:] # Remove the leading slash
+ if command not in commands:
+ status = '404 Not found'
+ response_headers = [('Content-type', 'text/plain')]
+ start_response(status, response_headers)
+ return ['The command was not found.\n']
+
+ try:
+ commands[command]()
+ except:
+ status = '500 Error'
+ response_headers = [('Content-type', 'text/plain')]
+ start_response(status, response_headers)
+ return ['Error occured!\n']
+
+ status = '200 OK'
+ response_headers = [('Content-type', 'text/plain')]
+ start_response(status, response_headers)
+ return ['Ok\n']
+
+force()
+httpd = make_server(host, port, app, server_class=QuitWSGIServer)
+httpd.serve_forever()
projects / xsetbg.git / blobdiff