Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 310 insertions, 0 deletions

diff --git a/juk/tracksequenceiterator.cpp b/juk/tracksequenceiterator.cpp
new file mode 100644
index 00000000..2c71008a
--- /dev/null
+++ b/juk/tracksequenceiterator.cpp
@@ -0,0 +1,310 @@
+/***************************************************************************
+    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<KToggleAction>("randomPlay")->isChecked();
+    bool loop = action("loopPlaylist") && action<KToggleAction>("loopPlaylist")->isChecked();
+    bool albumRandom = action("albumRandomPlay") && action<KToggleAction>("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[KApplication::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[KApplication::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<KToggleAction>("randomPlay")->isChecked();
+    bool albumRandom = action("albumRandomPlay") && action<KToggleAction>("albumRandomPlay")->isChecked();
+    
+    if(random || albumRandom) {
+        PlaylistItemList items = playlist->selectedItems();
+        if(items.isEmpty())
+            items = playlist->visibleItems();
+
+        PlaylistItem *newItem = 0;
+        if(!items.isEmpty())
+            newItem = items[KApplication::random() % items.count()];
+
+        setCurrent(newItem);
+        refillRandomList();
+    }
+    else {
+        QListViewItemIterator it(playlist, QListViewItemIterator::Visible | QListViewItemIterator::Selected);
+        if(!it.current())
+            it = QListViewItemIterator(playlist, QListViewItemIterator::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<KToggleAction>("randomPlay")->isChecked();
+    bool albumRandom = action("albumRandomPlay") && action<KToggleAction>("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: