history.py

Revision 1, 1.5 kB (checked in by mjoc, 2 years ago)
Initial import.

Line
1	# OpenDict
2	# Copyright (c) 2003 Martynas Jocius <mjoc@akl.lt>
3	#
4	# This program is free software; you can redistribute it and/or modify
5	# it under the terms of the GNU General Public License as published by
6	# the Free Software Foundation; either version 2 of the License, or
7	# (at your opinion) any later version.
8	#
9	# This program is distributed in the hope that will be useful,
10	# but WITHOUT ANY WARRANTY; without even the implied warranty of
11	# MECHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	# GNU General Public License for more detals.
13	#
14	# You shoud have received a copy of the GNU General Public License
15	# along with this program; if not, write to the Free Software
16	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17	# 02111-1307 USA
18	#
19	# Module: history
20
21	class History:
22
23	def __init__(self):
24
25	self.pages = []
26	self.index = -1
27
28	def add(self, page):
29
30	self.pages.append(page)
31	self.index = len(self.pages) - 1
32
33	def clear(self):
34
35	self.pages = []
36	self.index = -1
37
38	def back(self):
39
40	if self.index > 0:
41	self.index -= 1
42	page = self.pages[self.index]
43	else:
44	page = self.pages[self.index]
45
46	return page
47
48	def forward(self):
49
50	if self.index < len(self.pages) - 1:
51	self.index += 1
52	page = self.pages[self.index]
53	else:
54	page = self.pages[self.index]
55
56	return page
57
58	def canBack(self):
59
60	return self.index > 0
61
62	def canForward(self):
63
64	return self.index < len(self.pages) - 1
65

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