Mercurial > hg > svcore
view base/Selection.cpp @ 283:7336fe3a7caa
* Fix failure to properly load from text files with old-style Mac line endings
author | Chris Cannam |
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date | Thu, 09 Aug 2007 10:06:02 +0000 |
parents | d397ea0a79f5 |
children | 5877d68815c7 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam. 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 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "Selection.h" Selection::Selection() : m_startFrame(0), m_endFrame(0) { } Selection::Selection(size_t startFrame, size_t endFrame) : m_startFrame(startFrame), m_endFrame(endFrame) { if (m_startFrame > m_endFrame) { size_t tmp = m_endFrame; m_endFrame = m_startFrame; m_startFrame = tmp; } } Selection::Selection(const Selection &s) : m_startFrame(s.m_startFrame), m_endFrame(s.m_endFrame) { } Selection & Selection::operator=(const Selection &s) { if (this != &s) { m_startFrame = s.m_startFrame; m_endFrame = s.m_endFrame; } return *this; } Selection::~Selection() { } bool Selection::isEmpty() const { return m_startFrame == m_endFrame; } size_t Selection::getStartFrame() const { return m_startFrame; } size_t Selection::getEndFrame() const { return m_endFrame; } bool Selection::contains(size_t frame) const { return (frame >= m_startFrame) && (frame < m_endFrame); } bool Selection::operator<(const Selection &s) const { if (isEmpty()) { if (s.isEmpty()) return false; else return true; } else { if (s.isEmpty()) return false; else return (m_startFrame < s.m_startFrame); } } bool Selection::operator==(const Selection &s) const { if (isEmpty()) return s.isEmpty(); return (m_startFrame == s.m_startFrame && m_endFrame == s.m_endFrame); } MultiSelection::MultiSelection() { } MultiSelection::~MultiSelection() { } const MultiSelection::SelectionList & MultiSelection::getSelections() const { return m_selections; } void MultiSelection::setSelection(const Selection &selection) { clearSelections(); addSelection(selection); } void MultiSelection::addSelection(const Selection &selection) { m_selections.insert(selection); // Cope with a sitation where the new selection overlaps one or // more existing ones. This is a terribly inefficient way to do // this, but that probably isn't significant in real life. // It's essential for the correct operation of // getContainingSelection that the selections do not overlap, so // this is not just a frill. for (SelectionList::iterator i = m_selections.begin(); i != m_selections.end(); ) { SelectionList::iterator j = i; if (++j == m_selections.end()) break; if (i->getEndFrame() >= j->getStartFrame()) { Selection merged(i->getStartFrame(), std::max(i->getEndFrame(), j->getEndFrame())); m_selections.erase(i); m_selections.erase(j); m_selections.insert(merged); i = m_selections.begin(); } else { ++i; } } } void MultiSelection::removeSelection(const Selection &selection) { //!!! Likewise this needs to cope correctly with the situation //where selection is not one of the original selection set but //simply overlaps one of them (cutting down the original selection //appropriately) if (m_selections.find(selection) != m_selections.end()) { m_selections.erase(selection); } } void MultiSelection::clearSelections() { if (!m_selections.empty()) { m_selections.clear(); } } Selection MultiSelection::getContainingSelection(size_t frame, bool defaultToFollowing) const { // This scales very badly with the number of selections, but it's // more efficient for very small numbers of selections than a more // scalable method, and I think that may be what we need for (SelectionList::const_iterator i = m_selections.begin(); i != m_selections.end(); ++i) { if (i->contains(frame)) return *i; if (i->getStartFrame() > frame) { if (defaultToFollowing) return *i; else return Selection(); } } return Selection(); } QString MultiSelection::toXmlString(QString indent, QString extraAttributes) const { QString s; s += indent + QString("<selections %1>\n").arg(extraAttributes); for (SelectionList::iterator i = m_selections.begin(); i != m_selections.end(); ++i) { s += indent + QString(" <selection start=\"%1\" end=\"%2\"/>\n") .arg(i->getStartFrame()).arg(i->getEndFrame()); } s += indent + "</selections>\n"; return s; }