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livetrax/gtk2_ardour/region_selection.cc

317 lines
6.7 KiB
C++

/*
Copyright (C) 2006 Paul Davis
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.
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <algorithm>
#include "ardour/region.h"
#include "gui_thread.h"
#include "region_view.h"
#include "region_selection.h"
#include "time_axis_view.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
/** Construct an empty RegionSelection.
*/
RegionSelection::RegionSelection ()
{
RegionView::RegionViewGoingAway.connect (death_connection, MISSING_INVALIDATOR, ui_bind (&RegionSelection::remove_it, this, _1), gui_context());
_current_start = 0;
_current_end = 0;
}
/** Copy constructor.
* @param other RegionSelection to copy.
*/
RegionSelection::RegionSelection (const RegionSelection& other)
: std::list<RegionView*>()
{
RegionView::RegionViewGoingAway.connect (death_connection, MISSING_INVALIDATOR, ui_bind (&RegionSelection::remove_it, this, _1), gui_context());
_current_start = other._current_start;
_current_end = other._current_end;
for (RegionSelection::const_iterator i = other.begin(); i != other.end(); ++i) {
add (*i);
}
}
/** operator= to set a RegionSelection to be the same as another.
* @param other Other RegionSelection.
*/
RegionSelection&
RegionSelection::operator= (const RegionSelection& other)
{
if (this != &other) {
clear_all();
_current_start = other._current_start;
_current_end = other._current_end;
for (RegionSelection::const_iterator i = other.begin(); i != other.end(); ++i) {
add (*i);
}
}
return *this;
}
/** Empty this RegionSelection.
*/
void
RegionSelection::clear_all()
{
clear();
_bylayer.clear();
_current_start = 0;
_current_end = 0;
}
/**
* @param rv RegionView.
* @return true if this selection contains rv.
*/
bool RegionSelection::contains (RegionView* rv) const
{
return find (begin(), end(), rv) != end();
}
/** Add a region to the selection.
* @param rv Region to add.
* @return false if we already had the region or if it cannot be added,
* otherwise true.
*/
bool
RegionSelection::add (RegionView* rv)
{
if (!rv->region()->playlist()) {
/* not attached to a playlist - selection not allowed.
This happens if the user tries to select a region
during a capture pass.
*/
return false;
}
if (contains (rv)) {
/* we already have it */
return false;
}
if (rv->region()->first_frame() < _current_start || empty()) {
_current_start = rv->region()->first_frame();
}
if (rv->region()->last_frame() > _current_end || empty()) {
_current_end = rv->region()->last_frame();
}
push_back (rv);
/* add to layer sorted list */
add_to_layer (rv);
return true;
}
/** Remove a region from the selection.
* @param rv Region to remove.
*/
void
RegionSelection::remove_it (RegionView *rv)
{
remove (rv);
}
/** Remove a region from the selection.
* @param rv Region to remove.
* @return true if the region was in the selection, false if not.
*/
bool
RegionSelection::remove (RegionView* rv)
{
RegionSelection::iterator r;
if ((r = find (begin(), end(), rv)) != end()) {
// remove from layer sorted list
_bylayer.remove (rv);
if (size() == 1) {
/* this is the last one, so when we delete it
we will be empty.
*/
_current_start = 0;
_current_end = 0;
} else {
boost::shared_ptr<Region> region ((*r)->region());
if (region->first_frame() == _current_start) {
/* reset current start */
framepos_t ref = max_framepos;
for (RegionSelection::iterator i = begin (); i != end(); ++i) {
if (region->first_frame() < ref) {
ref = region->first_frame();
}
}
_current_start = ref;
}
if (region->last_frame() == _current_end) {
/* reset current end */
nframes_t ref = 0;
for (RegionSelection::iterator i = begin (); i != end(); ++i) {
if (region->first_frame() > ref) {
ref = region->first_frame();
}
}
_current_end = ref;
}
}
erase (r);
return true;
}
return false;
}
/** Add a region to the list sorted by layer.
* @param rv Region to add.
*/
void
RegionSelection::add_to_layer (RegionView * rv)
{
// insert it into layer sorted position
list<RegionView*>::iterator i;
for (i = _bylayer.begin(); i != _bylayer.end(); ++i)
{
if (rv->region()->layer() < (*i)->region()->layer()) {
_bylayer.insert(i, rv);
return;
}
}
// insert at end if we get here
_bylayer.insert(i, rv);
}
struct RegionSortByTime {
bool operator() (const RegionView* a, const RegionView* b) const {
return a->region()->position() < b->region()->position();
}
};
/**
* @param foo List which will be filled with the selection's regions
* sorted by position.
*/
void
RegionSelection::by_position (list<RegionView*>& foo) const
{
list<RegionView*>::const_iterator i;
RegionSortByTime sorter;
for (i = _bylayer.begin(); i != _bylayer.end(); ++i) {
foo.push_back (*i);
}
foo.sort (sorter);
return;
}
struct RegionSortByTrack {
bool operator() (const RegionView* a, const RegionView* b) const {
/* really, track and position */
if (a->get_time_axis_view().order() == b->get_time_axis_view().order()) {
return a->region()->position() < b->region()->position();
} else {
return a->get_time_axis_view().order() < b->get_time_axis_view().order();
}
}
};
/**
* @param List which will be filled with the selection's regions
* sorted by track and position.
*/
void
RegionSelection::by_track (list<RegionView*>& foo) const
{
list<RegionView*>::const_iterator i;
RegionSortByTrack sorter;
for (i = _bylayer.begin(); i != _bylayer.end(); ++i) {
foo.push_back (*i);
}
foo.sort (sorter);
return;
}
/**
* @param Sort the selection by position and track.
*/
void
RegionSelection::sort_by_position_and_track ()
{
RegionSortByTrack sorter;
sort (sorter);
}
/**
* @param tv Track.
* @return true if any of the selection's regions are on tv.
*/
bool
RegionSelection::involves (const TimeAxisView& tv) const
{
for (RegionSelection::const_iterator i = begin(); i != end(); ++i) {
if (&(*i)->get_time_axis_view() == &tv) {
return true;
}
}
return false;
}