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tdemultimedia/juk/tracksequenceiterator.cpp

311 lines
8.9 KiB

/***************************************************************************
begin : Thu Aug 19 2004
copyright : (C) 2002 - 2004 by Michael Pyne
email : michael.pyne@kde.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 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <kaction.h>
#include <kapplication.h>
#include <kdebug.h>
#include "tracksequenceiterator.h"
#include "playlist.h"
#include "actioncollection.h"
#include "tag.h"
#include "filehandle.h"
using namespace ActionCollection;
TrackSequenceIterator::TrackSequenceIterator() :
m_current(0)
{
}
TrackSequenceIterator::TrackSequenceIterator(const TrackSequenceIterator &other) :
m_current(other.m_current)
{
}
TrackSequenceIterator::~TrackSequenceIterator()
{
}
void TrackSequenceIterator::setCurrent(PlaylistItem *current)
{
m_current = current;
}
void TrackSequenceIterator::playlistChanged()
{
}
void TrackSequenceIterator::itemAboutToDie(const PlaylistItem *)
{
}
DefaultSequenceIterator::DefaultSequenceIterator() :
TrackSequenceIterator()
{
}
DefaultSequenceIterator::DefaultSequenceIterator(const DefaultSequenceIterator &other)
: TrackSequenceIterator(other)
{
}
DefaultSequenceIterator::~DefaultSequenceIterator()
{
}
void DefaultSequenceIterator::advance()
{
if(!current())
return;
bool isRandom = action("randomPlay") && action<TDEToggleAction>("randomPlay")->isChecked();
bool loop = action("loopPlaylist") && action<TDEToggleAction>("loopPlaylist")->isChecked();
bool albumRandom = action("albumRandomPlay") && action<TDEToggleAction>("albumRandomPlay")->isChecked();
if(isRandom || albumRandom) {
if(m_randomItems.isEmpty() && loop) {
// Since refillRandomList will remove the currently playing item,
// we should clear it out first since that's not good for e.g.
// lists with 1-2 items. We need to remember the Playlist though.
Playlist *playlist = current()->playlist();
setCurrent(0);
refillRandomList(playlist);
}
if(m_randomItems.isEmpty()) {
setCurrent(0);
return;
}
PlaylistItem *item;
if(albumRandom) {
if(m_albumSearch.isNull() || m_albumSearch.matchedItems().isEmpty()) {
item = m_randomItems[TDEApplication::random() % m_randomItems.count()];
initAlbumSearch(item);
}
// This can be null if initAlbumSearch() left the m_albumSearch
// empty because the album text was empty. Since we initAlbumSearch()
// with an item, the matchedItems() should never be empty.
if(!m_albumSearch.isNull()) {
PlaylistItemList albumMatches = m_albumSearch.matchedItems();
if(albumMatches.isEmpty()) {
kdError(65432) << "Unable to initialize album random play.\n";
kdError(65432) << "List of potential results is empty.\n";
return; // item is still set to random song from a few lines earlier.
}
item = albumMatches[0];
// Pick first song remaining in list.
for(unsigned i = 0; i < albumMatches.count(); ++i)
if(albumMatches[i]->file().tag()->track() < item->file().tag()->track())
item = albumMatches[i];
m_albumSearch.clearItem(item);
if(m_albumSearch.matchedItems().isEmpty()) {
m_albumSearch.clearComponents();
m_albumSearch.search();
}
}
else
kdError(65432) << "Unable to perform album random play on " << *item << endl;
}
else
item = m_randomItems[TDEApplication::random() % m_randomItems.count()];
setCurrent(item);
m_randomItems.remove(item);
}
else {
PlaylistItem *next = current()->itemBelow();
if(!next && loop) {
Playlist *p = current()->playlist();
next = p->firstChild();
while(next && !next->isVisible())
next = static_cast<PlaylistItem *>(next->nextSibling());
}
setCurrent(next);
}
}
void DefaultSequenceIterator::backup()
{
if(!current())
return;
PlaylistItem *item = current()->itemAbove();
if(item)
setCurrent(item);
}
void DefaultSequenceIterator::prepareToPlay(Playlist *playlist)
{
bool random = action("randomPlay") && action<TDEToggleAction>("randomPlay")->isChecked();
bool albumRandom = action("albumRandomPlay") && action<TDEToggleAction>("albumRandomPlay")->isChecked();
if(random || albumRandom) {
PlaylistItemList items = playlist->selectedItems();
if(items.isEmpty())
items = playlist->visibleItems();
PlaylistItem *newItem = 0;
if(!items.isEmpty())
newItem = items[TDEApplication::random() % items.count()];
setCurrent(newItem);
refillRandomList();
}
else {
TQListViewItemIterator it(playlist, TQListViewItemIterator::Visible | TQListViewItemIterator::Selected);
if(!it.current())
it = TQListViewItemIterator(playlist, TQListViewItemIterator::Visible);
setCurrent(static_cast<PlaylistItem *>(it.current()));
}
}
void DefaultSequenceIterator::reset()
{
m_randomItems.clear();
m_albumSearch.clearComponents();
m_albumSearch.search();
setCurrent(0);
}
void DefaultSequenceIterator::playlistChanged()
{
refillRandomList();
}
void DefaultSequenceIterator::itemAboutToDie(const PlaylistItem *item)
{
PlaylistItem *stfu_gcc = const_cast<PlaylistItem *>(item);
m_randomItems.remove(stfu_gcc);
}
void DefaultSequenceIterator::setCurrent(PlaylistItem *current)
{
PlaylistItem *oldCurrent = DefaultSequenceIterator::current();
TrackSequenceIterator::setCurrent(current);
bool random = action("randomPlay") && action<TDEToggleAction>("randomPlay")->isChecked();
bool albumRandom = action("albumRandomPlay") && action<TDEToggleAction>("albumRandomPlay")->isChecked();
if((albumRandom || random) && current && m_randomItems.isEmpty()) {
// We're setting a current item, refill the random list now, and remove
// the current item.
refillRandomList();
}
m_randomItems.remove(current);
if(albumRandom && current && !oldCurrent) {
// Same idea as above
initAlbumSearch(current);
m_albumSearch.clearItem(current);
}
}
DefaultSequenceIterator *DefaultSequenceIterator::clone() const
{
return new DefaultSequenceIterator(*this);
}
void DefaultSequenceIterator::refillRandomList(Playlist *p)
{
if(!p) {
if (!current())
return;
p = current()->playlist();
if(!p) {
kdError(65432) << k_funcinfo << "Item has no playlist!\n";
return;
}
}
m_randomItems = p->visibleItems();
m_randomItems.remove(current());
m_albumSearch.clearComponents();
m_albumSearch.search();
}
void DefaultSequenceIterator::initAlbumSearch(PlaylistItem *searchItem)
{
if(!searchItem)
return;
m_albumSearch.clearPlaylists();
m_albumSearch.addPlaylist(searchItem->playlist());
ColumnList columns;
m_albumSearch.setSearchMode(PlaylistSearch::MatchAll);
m_albumSearch.clearComponents();
// If the album name is empty, it will mess up the search,
// so ignore empty album names.
if(searchItem->file().tag()->album().isEmpty())
return;
columns.append(PlaylistItem::AlbumColumn);
m_albumSearch.addComponent(PlaylistSearch::Component(
searchItem->file().tag()->album(),
true,
columns,
PlaylistSearch::Component::Exact)
);
// If there is an Artist tag with the track, match against it as well
// to avoid things like multiple "Greatest Hits" albums matching the
// search.
if(!searchItem->file().tag()->artist().isEmpty()) {
kdDebug(65432) << "Searching both artist and album.\n";
columns[0] = PlaylistItem::ArtistColumn;
m_albumSearch.addComponent(PlaylistSearch::Component(
searchItem->file().tag()->artist(),
true,
columns,
PlaylistSearch::Component::Exact)
);
}
m_albumSearch.search();
}
// vim: set et sw=4 tw=0: