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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
pytagomacs – An Emacs like key–value editor library for Python
Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
class Killring():
'''
Killring class
'''
def __init__(self, limit = 50):
'''
Constructor
@param limit:int The maximum size of the killring
'''
self.killring, self.killmax, self.killptr = [], limit, 0
def add(self, text):
'''
Add a text to the killring
@param text:str The text to add
'''
self.killring.append(text)
if len(self.killring) > self.killmax:
self.killring[:] = self.killring[1:]
def is_empty(self):
'''
Checks if the killring is empty
@return :bool Whether the killring is empty
'''
return len(self.killring) == 0
def reset(self):
'''
Resets the killring pointer
'''
self.killptr = len(self.killring) - 1
def next(self):
'''
Get to the next item in the killring
'''
self.killptr -= 1
if self.killptr < 0:
self.killptr += len(self.killring)
def get(self):
'''
Gets the current item in the killring
@return :str The current item in the killring
'''
return self.killring[self.killptr]
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