1 /* 2 Drawpile - a collaborative drawing program. 3 4 Copyright (C) 2008-2019 Calle Laakkonen 5 6 Drawpile is free software: you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation, either version 3 of the License, or 9 (at your option) any later version. 10 11 Drawpile is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with Drawpile. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "history.h" 21 #include "../libshared/net/undo.h" 22 23 namespace canvas { 24 25 using namespace protocol; 26 History()27History::History() 28 : m_offset(0), m_bytes(0) 29 { 30 } 31 append(MessagePtr msg)32void History::append(MessagePtr msg) 33 { 34 m_messages.append(msg); 35 m_bytes += msg->length(); 36 } 37 cleanup(int indexlimit)38void History::cleanup(int indexlimit) 39 { 40 Q_ASSERT(indexlimit <= end()); 41 42 while(m_offset < indexlimit) { 43 m_bytes -= m_messages.takeFirst()->length(); 44 ++m_offset; 45 } 46 } 47 resetTo(int newoffset)48void History::resetTo(int newoffset) 49 { 50 Q_ASSERT(newoffset >= 0); 51 m_offset = newoffset; 52 m_messages.clear(); 53 m_bytes = 0; 54 } 55 56 } 57