-#! /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 or xsetbg programs.
+using xli program.
"""
-__version__ = "$Revision$"[11:-2]
-__revision__ = "$Id$"[5:-2]
-__date__ = "$Date$"[7:-2]
-
-__author__ = "Oleg BroytMann <phd@phd.pp.ru>"
-__copyright__ = "Copyright (C) 2000-2009 PhiloSoft Design"
-__license__ = "GNU GPL"
-
-
-import sys, os
-
+from fcntl import flock, LOCK_EX, LOCK_UN, LOCK_NB
+from datetime import timedelta
+import os
+import random
+import re
+import subprocess
+import sys
+from time import time
-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)
+from xsetbg_conf import xsetbg_dir, xsetbg_conf
+from xsetbg_db import xsetbg_db
-def error(error_str, error_code=1):
- sys.stderr.write("%s: Error: %s\n" % (sys.argv[0], error_str))
- sys.exit(error_code)
+__all__ = ['change']
-from ConfigParser import SafeConfigParser
+def error(error_str):
+ sys.exit("%s: Error: %s\n" % (sys.argv[0], error_str))
-xsetbg_dir = os.path.join(os.environ["HOME"], "lib", "xsetbg")
-os.chdir(xsetbg_dir)
-config = SafeConfigParser()
-config.read("xsetbg.conf")
+if not xsetbg_db:
+ error("No database found. Run rescan_fs.py. Abort.")
-if config.has_option("images", "directory") or \
- config.has_option("images", "directory0") or \
- config.has_option("images", "directory1"):
- image_dirs = []
- if config.has_option("images", "directory"):
- image_dirs.append(config.get("images", "directory"))
- if config.has_option("images", "directory0"):
- image_dirs.append(config.get("images", "directory0"))
- if config.has_option("images", "directory1"):
- image_dirs.append(config.get("images", "directory1"))
- i = 2
- while True:
- option = "directory%d" % i
- if config.has_option("images", option):
- image_dirs.append(config.get("images", option))
- i += 1
- else:
- break
-else:
- image_dirs = ["images"]
+if xsetbg_db.select().count() == 0:
+ error("No images found. Run rescan_fs.py. Abort.")
-image_dirs = [os.path.join(xsetbg_dir,
- os.path.expandvars(os.path.expanduser(dirname)))
- for dirname in image_dirs
-]
# minimum time in seconds between background image changes
-if config.has_option("xsetbg", "min_pause"):
- min_pause = config.getint("xsetbg", "min_pause")
+if xsetbg_conf.has_option("xsetbg", "min_pause"):
+ min_pause = xsetbg_conf.getint("xsetbg", "min_pause")
else:
- min_pause = 60
+ min_pause = 60
-borders = config.get("xsetbg", "borders").split(',')
-if config.has_option("xsetbg", "borders"):
- borders = [border.strip() for border in config.get("xsetbg", "borders").split(',')]
+borders = xsetbg_conf.get("xsetbg", "borders").split(',')
+if xsetbg_conf.has_option("xsetbg", "borders"):
+ borders = [border.strip() for border in
+ xsetbg_conf.get("xsetbg", "borders").split(',')]
else:
- borders = ["darkcyan", "steelblue", "midnightblue"]
+ borders = ["darkcyan", "steelblue", "midnightblue"]
# minimum time in seconds between occurences of the same image
-if config.has_option("xsetbg", "min_delay"):
- min_delay = config.getint("xsetbg", "min_delay")
-else:
- min_delay = 3600*24 # 24 hours
-
-del config
-
-
-os.umask(0066) # octal; -rw-------; make the global persistent dictionary
- # readable only by the user
-global_db_name = "xsetbg.db"
-
-
-# DB keys
-timestamp_key = "timestamp"
-filename_key = "filename"
-old_filename_key = "old_filename"
-
-
-import random
-import anydbm, shelve
-from time import time
-from fcntl import flock, LOCK_EX, LOCK_UN, LOCK_NB
-
-# 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.
-
-try:
- global_db = shelve.open(global_db_name, flag='c')
-except anydbm.error, msg:
- if str(msg) == "db type could not be determined":
- os.remove(global_db_name)
- global_db = shelve.open(global_db_name, flag='c')
-
-# 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)
-
-for key in to_delete:
- try:
- del global_db[key]
- except KeyError:
- pass
-
-global_db.close() # Close DB in the parent process
-
-
-images = []
-
-for image_dir in image_dirs:
- # List images in all subdirectories
- for dirpath, dirs, files in os.walk(image_dir):
- images.extend([os.path.join(dirpath, file) for file in files])
-
-if not images:
- error("No images found. Abort.")
+if xsetbg_conf.has_option("xsetbg", "min_delay"):
+ min_delay = xsetbg_conf.get("xsetbg", "min_delay")
+
+ # Borrowed from http://stackoverflow.com/a/2765366
+ td_re = re.compile('(?:(?P<years>\\d+)y)?'
+ '(?:(?P<months>\\d+)m)?'
+ '(?:(?P<days>\\d+)d)?'
+ '(?:T(?:(?P<hours>\\d+)h)?'
+ '(?:(?P<minutes>\\d+)m)?(?:(?P<seconds>\\d+)s)?)?')
+ td_dict = td_re.match(min_delay).groupdict(0)
+ delta = timedelta(days=int(td_dict['days']) +
+ (int(td_dict['months']) * 30) +
+ (int(td_dict['years']) * 365),
+ hours=int(td_dict['hours']),
+ minutes=int(td_dict['minutes']),
+ seconds=int(td_dict['seconds']))
+
+ if delta:
+ min_delay = delta.days * 24*3600 + delta.seconds
+ else:
+ min_delay = int(min_delay)
+else:
+ min_delay = 3600*24 # 24 hours
-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()
+if xsetbg_db.select(
+ '(is_image = 1) AND (last_shown IS NULL OR last_shown < %d)' %
+ (time() - min_delay)).count() == 0:
+ error("No unshown images found. Run rescan_fs.py "
+ "or decrease min_delay. Abort.")
- # 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)
- except IOError: # already locked
- lock_file.close()
- return
+fs_encoding = xsetbg_conf.get("images", "fs_encoding")
- 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()
+def change(force=False):
+ # Use the program's file as the lock file:
+ # lock it to prevent two processes run in parallel.
+ lock_file = open(os.path.join(xsetbg_dir, 'xsetbg.py'), 'r')
- # Reopen the global persistent dictionary
- global_db = shelve.open(global_db_name, 'w')
+ try:
+ flock(lock_file, LOCK_EX | LOCK_NB)
+ except IOError: # already locked
+ lock_file.close()
+ return
- timestamp = global_db.get(timestamp_key)
- current_time = time()
+ try:
+ timestamp = xsetbg_db.select(
+ '(is_image = 1) AND (last_shown IS NOT NULL)',
+ orderBy='-last_shown')[0].last_shown
+ current_time = time()
- if not force and timestamp is not None and \
- current_time - timestamp < min_pause: # Too early to change background
+ if not force and timestamp is not None and \
+ current_time - timestamp < min_pause:
+ # Too early to change background
return
- # Save current time
- global_db[timestamp_key] = current_time
-
- # Select a random image and check if we've seen it recently;
- # loop until we can find a new image (never seen before) or old enough.
- for i in xrange(len(images)): # ensure the loop is not infinite
- image_name = random.choice(images)
- if global_db.has_key(image_name):
- image_time = global_db[image_name]
- if current_time - image_time > min_delay:
- break
- else:
- break
- global_db[image_name] = current_time
-
- # Save filename
- if global_db.has_key(filename_key):
- global_db[old_filename_key] = global_db[filename_key]
- global_db[filename_key] = image_name
-
- finally:
- # Unlock and close the lock file
- flock(lock_file, LOCK_UN)
- lock_file.close()
- # Flush and close the global persistent dictionary
- if global_db: global_db.close()
-
- program_options = ["xli", "xli", "-onroot", "-quiet"] + \
- ["-center", "-border", random.choice(borders), "-zoom", "auto",
- image_name]
-
- os.execlp(*program_options)
- error("cannot execute xli!")
-
-
-if __name__ == "__main__":
- run()
+ # Select a random image that has never been shown
+ not_shown_select = xsetbg_db.select(
+ '(is_image = 1) AND (last_shown IS NULL)')
+ not_shown_count = not_shown_select.count()
+ if not_shown_count:
+ row = not_shown_select[random.randint(0, not_shown_count - 1)]
+ else:
+ old_shown_select = xsetbg_db.select(
+ '(is_image = 1) AND '
+ '(last_shown IS NOT NULL AND last_shown < %d)' %
+ current_time - min_delay)
+ old_shown_count = old_shown_select.count()
+ if old_shown_count:
+ row = old_shown_select[random.randint(0, old_shown_count - 1)]
+ else:
+ error("No images to show found. Run rescan_fs.py "
+ "or decrease min_delay. Abort.")
+
+ program_options = ["xli", "-border", random.choice(borders),
+ "-center", "-onroot", "-quiet", "-zoom", "auto",
+ row.full_name.encode(fs_encoding)]
+
+ ext = os.path.splitext(row.full_name)[1].lower()
+ if ext in ('tif', 'tiff'):
+ program_options[0] = 'xsetbg'
+
+ if ext == 'webp':
+ program_options = ['display', '-backdrop',
+ '-background', random.choice(borders),
+ '-window', 'root',
+ row.full_name.encode(fs_encoding)]
+
+ rc = subprocess.call(program_options)
+ if rc:
+ error("cannot execute xli!")
+ else:
+ row.last_shown = current_time
+
+ finally:
+ # Unlock and close the lock file
+ flock(lock_file, LOCK_UN)
+ lock_file.close()
projects / xsetbg.git / blobdiff