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function Playlist(pl) {
this.pl = pl;
this.current = null;
this.lastalbum = null;
this.get = function(path, track) {
var li = this.pl.getElementsByTagName('li')[0];
while(li) {
var as = li.getElementsByTagName('a');
if(as.length == 2) {
var a = as[0];
if(a.ml.path == path && (!track || a.ml.track == track))
return li;
}
li = li.nextElementSibling;
}
return null;
}
this.add = function(ml) {
var a = document.createElement('a');
a.setAttribute('class', 'song');
a.setAttribute('href', '#');
var name = ml.get_text();
a.appendChild(document.createTextNode(name));
a.ml = ml;
var li = document.createElement('li');
var pl = this;
a.onclick = function() {
while(li.previousElementSibling && li.previousElementSibling.getAttribute('class') != 'album')
li.previousElementSibling.parentElement.removeChild(li.previousElementSibling);
// Remove children above the album marker.
// This could probably be done in a more elegant way.
if(li.previousElementSibling && li.previousElementSibling.previousElementSibling)
while(li.previousElementSibling.previousElementSibling)
li.previousElementSibling.previousElementSibling.parentElement.removeChild(li.previousElementSibling.previousElementSibling);
if(li.previousElementSibling && pl.pl.firstChild != li.previousElementSibling)
pl.pl.removeChild(pl.pl.firstChild);
a.setAttribute('class', 'song playing');
pl.current = li;
ml.play();
var nextsong = li.nextElementSibling;
// avoid breaking when a track has been removed
while(nextsong && nextsong.childElementCount == 0)
nextsong = nextsong.nextElementSibling;
if(nextsong && nextsong.getAttribute('class') == 'album')
nextsong = nextsong.nextElementSibling;
if(nextsong) {
var nexta = nextsong.getElementsByTagName('a')[0];
nexta.ml.recode();
}
return false;
}
// album header
if(ml.metadata.album != this.lastalbum) {
var album_li = document.createElement('li');
album_li.appendChild(document.createTextNode(ml.metadata.album));
album_li.setAttribute('class', 'album');
var a_del = document.createElement('a');
a_del.setAttribute('class', 'delete');
a_del.setAttribute('href', '#');
a_del.setAttribute('title', 'Remove');
var del_img = new Image();
del_img.src = '/static/icons/delete.png';
a_del.appendChild(del_img);
a_del.onclick = (function(album_li) {
return function() {
while(album_li.nextElementSibling && album_li.nextElementSibling.getAttribute('class') != 'album')
pl.pl.removeChild(album_li.nextElementSibling);
pl.pl.removeChild(album_li);
return false;
}
})(album_li);
var span = document.createElement('span');
span.style.display = 'none';
album_li.onmouseover = (function(span) {
return function() {
span.style.display = '';
}
})(span);
album_li.onmouseout = (function(span) {
return function() {
span.style.display = 'none';
}
})(span);
span.appendChild(a_del);
album_li.appendChild(span);
this.pl.appendChild(album_li);
this.lastalbum = ml.metadata.album;
}
var div = document.createElement('div');
// anchor to remove track from playlist
var a_del = document.createElement('a');
a_del.setAttribute('class', 'delete');
a_del.setAttribute('href', '#');
a_del.setAttribute('title', 'Remove');
var del_img = new Image();
del_img.src = '/static/icons/delete.png';
a_del.appendChild(del_img);
a_del.onclick = function() {
// remove previous element if it is an album header and we're at end of queue,
// or next element is an album header
if(li.previousElementSibling && li.previousElementSibling.getAttribute('class') == 'album'
&& (!li.nextElementSibling || li.nextElementSibling.getAttribute('class') == 'album'))
pl.pl.removeChild(li.previousElementSibling);
pl.pl.removeChild(li);
if(pl.pl.childElementCount == 0)
pl.lastalbum = null;
// recode next
var next = pl.get_next();
if(next)
next.getElementsByTagName('a')[0].ml.recode();
return false;
}
var span = document.createElement('span');
span.style.display = 'none';
div.onmouseover = (function(span) {
return function() {
span.style.display = '';
}
})(span);
div.onmouseout = (function(span) {
return function() {
span.style.display = 'none';
}
})(span);
div.appendChild(a);
div.appendChild(document.createTextNode(' '));
span.appendChild(a_del);
span.setAttribute('class', 'right');
div.appendChild(span);
li.appendChild(div);
this.pl.appendChild(li);
if(this.get_next() == li)
ml.recode();
}
// get the next queued song
this.get_next = function() {
var next = null;
if(this.current)
next = this.current.nextElementSibling;
else if(this.pl.firstChild)
next = this.pl.firstChild;
if(!next)
return null;
if(next.getAttribute('class') == 'album')
next = next.nextElementSibling;
return next;
}
// play the next queued song
this.next = function() {
if(this.current) {
var old = this.current;
this.current = this.current.nextElementSibling;
old.parentElement.removeChild(old);
}
// avoid breaking when a track has been removed
while(this.current && this.current.getAttribute('class') == 'album') {
this.current = this.current.nextElementSibling;
}
if(this.current) {
var a = this.current.getElementsByTagName('a')[0];
a.onclick();
} else {
this.lastalbum = null;
this.pl.removeChild(this.pl.firstChild);
}
}
}
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