477 lines
16 KiB
Python
477 lines
16 KiB
Python
"""
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Define the PluginConfig and Plugin classes, plus the SafetyMetaclass.
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These are used in the plugin system added in poezio 0.7.5
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(see plugin_manager.py)
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"""
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import os
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from functools import partial
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from configparser import RawConfigParser
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from timed_events import TimedEvent, DelayedEvent
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import config
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import inspect
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import traceback
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import logging
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log = logging.getLogger(__name__)
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class PluginConfig(config.Config):
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"""
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Plugin configuration object.
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They are accessible inside the plugin with self.config
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and behave like the core Config object.
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"""
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def __init__(self, filename, module_name, default=None):
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config.Config.__init__(self, filename, default=default)
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self.module_name = module_name
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self.read()
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def get(self, option, default=None, section=None):
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if not section:
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section = self.module_name
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return config.Config.get(self, option, default, section)
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def set(self, option, default, section=None):
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if not section:
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section = self.module_name
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return config.Config.set_and_save(self, option, default, section)
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def remove(self, option, section=None):
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if not section:
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section = self.module_name
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return config.Config.remove_and_save(self, option, section)
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def read(self):
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"""Read the config file"""
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RawConfigParser.read(self, self.file_name)
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if not self.has_section(self.module_name):
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self.add_section(self.module_name)
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def options(self, section=None):
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"""
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Return the options of the section
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If no section is given, it defaults to the plugin name.
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"""
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if not section:
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section = self.module_name
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if not self.has_section(section):
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self.add_section(section)
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return config.Config.options(self, section)
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def write(self):
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"""Write the config to the disk"""
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try:
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fp = open(self.file_name, 'w')
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RawConfigParser.write(self, fp)
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fp.close()
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return True
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except IOError:
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return False
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class SafetyMetaclass(type):
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# A hack
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core = None
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@staticmethod
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def safe_func(f):
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def helper(*args, **kwargs):
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try:
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return f(*args, **kwargs)
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except:
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if inspect.stack()[1][1] == inspect.getfile(f):
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raise
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elif SafetyMetaclass.core:
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log.error('Error in a plugin', exc_info=True)
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SafetyMetaclass.core.information(traceback.format_exc())
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return None
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return helper
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def __new__(meta, name, bases, class_dict):
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for k, v in class_dict.items():
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if inspect.isfunction(v):
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if k != '__init__' and k != 'init':
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class_dict[k] = SafetyMetaclass.safe_func(v)
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return type.__new__(meta, name, bases, class_dict)
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class PluginWrap(object):
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"""
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A wrapper to implicitly pass the module name to PluginAPI
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"""
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def __init__(self, api, module):
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self.api = api
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self.module = module
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def __getattribute__(self, name):
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api = object.__getattribute__(self, 'api')
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module = object.__getattribute__(self, 'module')
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return partial(getattr(api, name), module)
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class PluginAPI(object):
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"""
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The public API exposed to the plugins.
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Its goal is to limit the use of the raw Core object
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as much as possible.
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"""
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def __init__(self, core, plugin_manager):
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self.core = core
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self.plugin_manager = plugin_manager
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def __getitem__(self, value):
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return PluginWrap(self, value)
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def send_message(self, _, *args, **kwargs):
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"""
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Send a message to the current tab.
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:param str msg: The message to send.
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"""
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return self.core.send_message(*args, **kwargs)
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def get_conversation_messages(self, _, *args, **kwargs):
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"""
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Get all the Messages of the current Tab.
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:returns: The list of :py:class:`text_buffer.Message` objects.
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:returns: None if the Tab does not inherit from ChatTab.
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:rtype: :py:class:`list`
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"""
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return self.core.get_conversation_messages()
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def add_timed_event(self, _, *args, **kwargs):
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"""
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Schedule a timed event.
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:param timed_events.TimedEvent event: The timed event to schedule.
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"""
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return self.core.add_timed_event(*args, **kwargs)
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def remove_timed_event(self, _, *args, **kwargs):
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"""
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Unschedule a timed event.
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:param timed_events.TimedEvent event: The event to unschedule.
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"""
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return self.core.remove_timed_event(*args, **kwargs)
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def create_timed_event(self, _, *args, **kwargs):
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"""
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Create a timed event, but do not schedule it;
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:py:func:`~PluginAPI.add_timed_event` must be used for that.
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:param datetime.datetime date: The time at which the handler must be executed
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:param function callback: The handler that will be executed
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:param \*args: Optional arguments passed to the handler.
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:return: The created event.
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:rtype: :py:class:`timed_events.TimedEvent`
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"""
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return TimedEvent(*args, **kwargs)
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def create_delayed_event(self, _, *args, **kwargs):
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"""
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Create a delayed event, but do not schedule it;
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:py:func:`~PluginAPI.add_timed_event` must be used for that.
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A delayed event is a timed event with a delay from the time
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this function is called (instead of a datetime).
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:param int delay: The number of seconds to schedule the execution
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:param function callback: The handler that will be executed
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:param \*args: Optional arguments passed to the handler.
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:return: The created event.
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:rtype: :py:class:`timed_events.DelayedEvent`
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"""
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return DelayedEvent(*args, **kwargs)
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def information(self, _, *args, **kwargs):
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"""
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Display a new message in the information buffer.
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:param str msg: The message to display.
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:param str typ: The message type (e.g. Info, Error…)
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"""
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return self.core.information(*args, **kwargs)
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def current_tab(self, _):
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"""
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Get the current Tab.
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:returns: The current tab.
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"""
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return self.core.current_tab()
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def run_command(self, _, *args, **kwargs):
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"""
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Run a command from the current tab.
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(a command starts with a /, if not, it’s a message)
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:param str line: The command to run.
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"""
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return self.core.current_tab().execute_command(*args, **kwargs)
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def all_tabs(self, _):
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"""
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Return a list of all opened tabs
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:returns list: The list of tabs.
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"""
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return self.core.tabs
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def add_command(self, module, *args, **kwargs):
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"""
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Add a global command.
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:param str name: The name of the command (/name)
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:param function handler: The function called when the command is run.
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:param str help: The complete help for that command.
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:param str short: A short description of the command.
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:param function completion: The completion function for that command
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(optional)
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:param str usage: A string showing the required and optional args
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of the command. Optional args should be surrounded by []
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and mandatory args should be surrounded by <>.
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Example string: "<server> [port]"
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:raises Exception: If the command already exists.
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"""
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return self.plugin_manager.add_command(module, *args, **kwargs)
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def del_command(self, module, *args, **kwargs):
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"""
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Remove a global command.
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:param str name: The name of the command to remove.
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That command _must_ have been added by the same plugin
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"""
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return self.plugin_manager.del_command(module, *args, **kwargs)
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def add_key(self, module, *args, **kwargs):
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"""
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Associate a global binding to a handler.
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:param str key: The curses representation of the binding.
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:param function handler: The function called when the binding is pressed.
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:raise Exception: If the binding is already present.
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"""
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return self.plugin_manager.add_key(module, *args, **kwargs)
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def del_key(self, module, *args, **kwargs):
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"""
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Remove a global binding.
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:param str key: The binding to remove.
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"""
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return self.plugin_manager.del_key(module, *args, **kwargs)
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def add_tab_key(self, module, *args, **kwargs):
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"""
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Associate a binding to a handler, but only for a certain tab type.
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:param Tab tab_type: The type of tab to target.
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:param str key: The binding to add.
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:param function handler: The function called when the binding is pressed
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"""
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return self.plugin_manager.add_tab_key(module, *args, **kwargs)
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def del_tab_key(self, module, *args, **kwargs):
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"""
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Remove a binding added with add_tab_key
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:param tabs.Tab tab_type: The type of tab to target.
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:param str key: The binding to remove.
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"""
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return self.plugin_manager.del_tab_key(module, *args, **kwargs)
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def add_tab_command(self, module, *args, **kwargs):
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"""
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Add a command to only one type of tab.
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:param tabs.Tab tab_type: The type of Tab to target.
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:param str name: The name of the command (/name)
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:param function handler: The function called when the command is run.
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:param str help: The complete help for that command.
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:param str short: A short description of the command.
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:param function completion: The completion function for that command
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(optional)
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:param str usage: A string showing the required and optional args
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of the command. Optional args should be surrounded by []
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and mandatory args should be surrounded by <>.
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Example string: "<server> [port]"
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:raise Exception: If the command already exists.
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"""
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return self.plugin_manager.add_tab_command(module, *args, **kwargs)
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def del_tab_command(self, module, *args, **kwargs):
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"""
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Remove a tab-specific command.
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:param tabs.Tab tab_type: The type of tab to target.
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:param str name: The name of the command to remove.
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That command _must_ have been added by the same plugin
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"""
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return self.plugin_manager.del_tab_command(module, *args, **kwargs)
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def add_event_handler(self, module, *args, **kwargs):
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"""
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Add an event handler for a poezio event.
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:param str event_name: The event name.
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:param function handler: The handler function.
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:param int position: The position of that handler in the handler list.
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This is useful for plugins like GPG or OTR, which must be the last
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function called on the text.
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Defaults to 0.
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A complete list of those events can be found at
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http://poezio.eu/doc/en/dev/events.html
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"""
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return self.plugin_manager.add_event_handler(module, *args, **kwargs)
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def del_event_handler(self, module, *args, **kwargs):
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"""
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Remove a handler for a poezio event.
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:param str event_name: The name of the targeted event.
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:param function handler: The function to remove from the handlers.
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"""
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return self.plugin_manager.del_event_handler(module, *args, **kwargs)
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def add_slix_event_handler(self, module, event_name, handler):
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"""
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Add an event handler for a slixmpp event.
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:param str event_name: The event name.
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:param function handler: The handler function.
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A list of the slixmpp events can be found here
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http://sleekxmpp.com/event_index.html
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"""
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self.core.xmpp.add_event_handler(event_name, handler)
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def del_slix_event_handler(self, module, event_name, handler):
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"""
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Remove a handler for a slixmpp event
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:param str event_name: The name of the targeted event.
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:param function handler: The function to remove from the handlers.
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"""
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self.core.xmpp.del_event_handler(event_name, handler)
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class BasePlugin(object, metaclass=SafetyMetaclass):
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"""
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Class that all plugins derive from.
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"""
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default_config = None
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def __init__(self, plugin_api, core, plugins_conf_dir):
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self.core = core
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# More hack; luckily we'll never have more than one core object
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SafetyMetaclass.core = core
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conf = os.path.join(plugins_conf_dir, self.__module__+'.cfg')
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try:
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self.config = PluginConfig(conf, self.__module__,
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default=self.default_config)
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except Exception:
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log.debug('Error while creating the plugin config', exc_info=True)
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self.config = PluginConfig(conf, self.__module__)
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self._api = plugin_api[self.name]
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self.init()
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@property
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def name(self):
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"""
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Get the name (module name) of the plugin.
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"""
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return self.__module__
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@property
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def api(self):
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return self._api
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def init(self):
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"""
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Method called at the creation of the plugin.
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Do not overwrite __init__ and use this instead.
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"""
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pass
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def cleanup(self):
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"""
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Called when the plugin is unloaded.
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Overwrite this if you want to erase or save things before the plugin is disabled.
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"""
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pass
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def unload(self):
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self.cleanup()
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def add_command(self, name, handler, help, completion=None, short='', usage=''):
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"""
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Add a global command.
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You cannot overwrite the existing commands.
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"""
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return self.api.add_command(name, handler, help,
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completion=completion, short=short, usage=usage)
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def del_command(self, name):
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"""
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Remove a global command.
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This only works if the command was added by the plugin
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"""
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return self.api.del_command(name)
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def add_key(self, key, handler):
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"""
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Add a global keybind
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"""
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return self.api.add_key(key, handler)
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def del_key(self, key):
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"""
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Remove a global keybind
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"""
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return self.api.del_key(key)
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def add_tab_key(self, tab_type, key, handler):
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"""
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Add a keybind only for a type of tab.
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"""
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return self.api.add_tab_key(tab_type, key, handler)
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def del_tab_key(self, tab_type, key):
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"""
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Remove a keybind added through add_tab_key.
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"""
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return self.api.del_tab_key(tab_type, key)
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def add_tab_command(self, tab_type, name, handler, help, completion=None, short='', usage=''):
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"""
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Add a command only for a type of tab.
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"""
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return self.api.add_tab_command(tab_type, name, handler, help,
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completion=completion, short=short, usage=usage)
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def del_tab_command(self, tab_type, name):
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"""
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Delete a command added through add_tab_command.
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"""
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return self.api.del_tab_command(tab_type, name)
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def add_event_handler(self, event_name, handler, position=0):
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"""
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Add an event handler to the event event_name.
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An optional position in the event handler list can be provided.
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"""
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return self.api.add_event_handler(event_name, handler, position)
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def del_event_handler(self, event_name, handler):
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"""
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Remove 'handler' from the event list for 'event_name'.
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"""
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return self.api.del_event_handler(event_name, handler)
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