X-Git-Url: https://git.phdru.name/?a=blobdiff_plain;f=xsetbg.py;h=0d9d646e50fd94963c435bb6832395c7dab78184;hb=74669ff7c80440e8d0def1b9955239e9146f1308;hp=0a4a3f97b6169e3de3bbe12035b2d97b5b5abab6;hpb=9e375793293e76527dddcf4645c4336a51670127;p=xsetbg.git diff --git a/xsetbg.py b/xsetbg.py index 0a4a3f9..0d9d646 100755 --- a/xsetbg.py +++ b/xsetbg.py @@ -1,53 +1,43 @@ -#! /usr/local/bin/python -O -"""Select a random image from $HOME/lib/xsetbg/images subdirectories -and set it as the desktop wallpaper (display it in the root window). +#! /usr/bin/env python +"""Set a random background image (XWin) + +Select a random image from a (list of) directory(s) +and set it as the desktop wallpaper (display it in the root window) +using xli program. -Author: Oleg BroytMann -Copyright (C) 2000-2006 PhiloSoft Design """ -__version__ = "2.17.0" -__author__ = "Oleg BroytMann " -__copyright__ = "Copyright (C) 2000-2006 PhiloSoft Design" +__version__ = "$Revision$"[11:-2] __revision__ = "$Id$"[5:-2] __date__ = "$Date$"[7:-2] +__author__ = "Oleg Broytman " +__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() @@ -91,6 +81,23 @@ if config.has_option("xsetbg", "borders"): else: 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 + +# 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 @@ -99,14 +106,13 @@ os.umask(0066) # octal; -rw-------; make the global persistent dictionary 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') @@ -115,13 +121,21 @@ except anydbm.error, msg: 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 = [] @@ -135,29 +149,17 @@ if not 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 @@ -165,11 +167,6 @@ def run(): 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') @@ -183,47 +180,80 @@ def run(): # Save current time global_db[timestamp_key] = current_time - border = random.choice(borders) - image_name = random.choice(images) - root, ext = os.path.splitext(image_name) + # 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 - 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()