forked from openlp/openlp
557114fd7f
Added display updates when Bibles load Try to fix the creeping progress bar. bzr-revno: 299
117 lines
4.5 KiB
Python
117 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4
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"""
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OpenLP - Open Source Lyrics Projection
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Copyright (c) 2008 Raoul Snyman
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Portions copyright (c) 2008 Martin Thompson, Tim Bentley,
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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import os
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import sys
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import logging
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from openlp.core.lib import Plugin
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class PluginManager(object):
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"""
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This is the Plugin manager, which loads all the plugins,
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and executes all the hooks, as and when necessary.
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"""
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global log
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log=logging.getLogger("PluginMgr")
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log.info("Plugin manager loaded")
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def __init__(self, dir):
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"""
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The constructor for the plugin manager. This does a, b and c.
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"""
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log.info("Plugin manager initing")
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if not dir in sys.path:
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log.debug("Inserting %s into sys.path", dir)
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sys.path.insert(0, dir)
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self.basepath = os.path.abspath(dir)
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log.debug("Base path %s ", self.basepath)
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self.plugins = []
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self.find_plugins(dir)
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log.info("Plugin manager done init")
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def find_plugins(self, dir):
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"""
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Scan the directory dir for objects inheriting from openlp.plugin
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"""
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startdepth=len(os.path.abspath(dir).split(os.sep))
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log.debug("find plugins %s at depth %d" %( str(dir), startdepth))
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for root, dirs, files in os.walk(dir):
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for name in files:
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if name.endswith(".py") and not name.startswith("__"):
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path = os.path.abspath(os.path.join(root, name))
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thisdepth=len(path.split(os.sep))
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if thisdepth-startdepth > 2: # skip anything lower down
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continue
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modulename, pyext = os.path.splitext(path)
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prefix = os.path.commonprefix([self.basepath, path])
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# hack off the plugin base path
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modulename = modulename[len(prefix) + 1:]
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modulename = modulename.replace(os.path.sep, '.')
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# import the modules
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log.debug("Importing %s from %s. Depth %d" % (modulename, path, thisdepth))
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try:
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__import__(modulename, globals(), locals(), [])
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except ImportError, e:
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log.error("Failed to import module %s on path %s for reason %s", modulename, path, e.message)
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self.plugin_classes = Plugin.__subclasses__()
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self.plugins = []
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plugin_objects = []
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for p in self.plugin_classes:
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plugin = p()
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if plugin.check_pre_conditions():
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plugin_objects.append(plugin)
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self.plugins = sorted(plugin_objects, self.order_by_weight)
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def order_by_weight(self, x, y):
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return cmp(x.weight, y.weight)
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def hook_media_manager(self, mediatoolbox):
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"""
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Loop through all the plugins. If a plugin has a valid media manager item,
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add it to the media manager.
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"""
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for plugin in self.plugins:
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media_manager_item = plugin.get_media_manager_item()
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if media_manager_item is not None:
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log.debug('Inserting media manager item from %s' % plugin.name)
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mediatoolbox.addItem(media_manager_item, plugin.icon, media_manager_item.title)
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plugin.initialise()
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def hook_import_menu(self, import_menu):
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"""
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Loop through all the plugins and give them an opportunity to add an item
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to the import menu.
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"""
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for plugin in self.plugins:
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plugin.add_import_menu_item(import_menu)
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def hook_export_menu(self, export_menu):
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"""
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Loop through all the plugins and give them an opportunity to add an item
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to the export menu.
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"""
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for plugin in self.plugins:
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plugin.add_export_menu_item(export_menu)
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def hook_handle_event(self, event):
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pass
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