forked from openlp/openlp
185 lines
7.7 KiB
Python
185 lines
7.7 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2017 OpenLP Developers #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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"""
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Provide plugin management
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"""
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import os
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from openlp.core.lib import Plugin, PluginStatus
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from openlp.core.common import AppLocation, RegistryProperties, OpenLPMixin, RegistryMixin, extension_loader
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class PluginManager(RegistryMixin, OpenLPMixin, RegistryProperties):
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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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def __init__(self, parent=None):
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"""
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The constructor for the plugin manager. Passes the controllers on to
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the plugins for them to interact with via their ServiceItems.
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"""
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super(PluginManager, self).__init__(parent)
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self.log_info('Plugin manager Initialising')
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self.base_path = os.path.abspath(str(AppLocation.get_directory(AppLocation.PluginsDir)))
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self.log_debug('Base path {path}'.format(path=self.base_path))
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self.plugins = []
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self.log_info('Plugin manager Initialised')
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def bootstrap_initialise(self):
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"""
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Bootstrap all the plugin manager functions
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"""
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self.find_plugins()
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# hook methods have to happen after find_plugins. Find plugins needs
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# the controllers hence the hooks have moved from setupUI() to here
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# Find and insert settings tabs
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self.hook_settings_tabs()
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# Find and insert media manager items
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self.hook_media_manager()
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# Call the hook method to pull in import menus.
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self.hook_import_menu()
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# Call the hook method to pull in export menus.
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self.hook_export_menu()
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# Call the hook method to pull in tools menus.
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self.hook_tools_menu()
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# Call the initialise method to setup plugins.
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self.initialise_plugins()
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def find_plugins(self):
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"""
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Scan a directory for objects inheriting from the ``Plugin`` class.
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"""
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glob_pattern = os.path.join('openlp', 'plugins', '*', '*plugin.py')
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extension_loader(glob_pattern)
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plugin_classes = Plugin.__subclasses__()
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plugin_objects = []
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for p in plugin_classes:
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try:
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plugin = p()
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self.log_debug('Loaded plugin {plugin}'.format(plugin=str(p)))
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plugin_objects.append(plugin)
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except TypeError:
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self.log_exception('Failed to load plugin {plugin}'.format(plugin=str(p)))
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plugins_list = sorted(plugin_objects, key=lambda plugin: plugin.weight)
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for plugin in plugins_list:
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if plugin.check_pre_conditions():
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self.log_debug('Plugin {plugin} active'.format(plugin=str(plugin.name)))
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plugin.set_status()
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else:
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plugin.status = PluginStatus.Disabled
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self.plugins.append(plugin)
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def hook_media_manager(self):
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"""
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Create the plugins' media manager items.
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.create_media_manager_item()
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def hook_settings_tabs(self):
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"""
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Loop through all the plugins. If a plugin has a valid settings tab
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item, add it to the settings tab.
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Tabs are set for all plugins not just Active ones
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.create_settings_tab(self.settings_form)
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def hook_import_menu(self):
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"""
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Loop through all the plugins and give them an opportunity to add an
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item to the import menu.
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.add_import_menu_item(self.main_window.file_import_menu)
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def hook_export_menu(self):
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"""
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Loop through all the plugins and give them an opportunity to add an
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item to the export menu.
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.add_export_menu_item(self.main_window.file_export_menu)
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def hook_tools_menu(self):
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"""
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Loop through all the plugins and give them an opportunity to add an
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item to the tools menu.
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.add_tools_menu_item(self.main_window.tools_menu)
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def hook_upgrade_plugin_settings(self, settings):
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"""
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Loop through all the plugins and give them an opportunity to upgrade their settings.
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:param settings: The Settings object containing the old settings.
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"""
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for plugin in self.plugins:
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if plugin.status is not PluginStatus.Disabled:
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plugin.upgrade_settings(settings)
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def initialise_plugins(self):
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"""
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Loop through all the plugins and give them an opportunity to initialise themselves.
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"""
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for plugin in self.plugins:
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self.log_info('initialising plugins {plugin} in a {state} state'.format(plugin=plugin.name,
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state=plugin.is_active()))
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if plugin.is_active():
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plugin.initialise()
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self.log_info('Initialisation Complete for {plugin}'.format(plugin=plugin.name))
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def finalise_plugins(self):
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"""
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Loop through all the plugins and give them an opportunity to clean themselves up
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"""
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for plugin in self.plugins:
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if plugin.is_active():
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plugin.finalise()
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self.log_info('Finalisation Complete for {plugin}'.format(plugin=plugin.name))
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def get_plugin_by_name(self, name):
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"""
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Return the plugin which has a name with value ``name``.
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"""
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for plugin in self.plugins:
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if plugin.name == name:
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return plugin
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return None
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def new_service_created(self):
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"""
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Loop through all the plugins and give them an opportunity to handle a new service
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"""
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for plugin in self.plugins:
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if plugin.is_active():
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plugin.new_service_created()
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