import sets, string

import color, method, minibuffer, mode, point
import random

class Which(mode.Fundamental):
    '''This is the default mode'''
    def __init__(self, w):
        mode.Fundamental.__init__(self, w)

        old_mode = w.buffer.method.old_window.mode

        self.actions = dict(old_mode.actions)
        self.bindings = dict(old_mode.bindings)

        for name in self.actions.keys():
            old_method = self.actions[name]
            new_method = HelpWrapper(old_method)
            self.actions[name] = new_method

    def name(self):
        return "Which"
    def handle_token(self, t):
        '''self.handle_token(token): handles input "token"'''
        self.window.active_point = None
        try:
            act = mode.Handler.handle_token(self, t)
            if act is None:
                return
            else:
                self.window.application.clear_error()
                act.execute(self.window)
                self.window.application.last_action = act.name
        except Exception, e:
            self.window.application.set_error('%r is not bound to anything' % self.last_sequence)
            _end(self.window)

class HelpWrapper(method.Method):
    def __init__(self, m):
        self.name = "help-for-%s" % m.name
        self.args = []
        self.help = 'provide help for the %r command' % m.name
        self._m_name = m.name
        self._m_help = m.help
    def _execute(self, window, **vargs):
        seq = window.mode.last_sequence
        s = '%r is %r: %s' % (seq, self._m_name, self._m_help)
        window.application.set_error(s)
        _end(window)

def _end(window):
    window.application.close_mini_buffer()
    window.buffer.method.old_cursor = None
    window.buffer.method.old_window = None