alternate-media.js
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webshim.ready('jmebase es5', function(){
var webshim = window.webshim;
var $ = webshim.$;
var jme = $.jme;
jme.defineProp('currentAlternateSrc', {
readonly: true,
get: function(elem){
var ret, prop;
var data = jme.data(elem);
var alternateSrces = data.media.jmeFn('getAlternateSrcData');
var currentSrc = data.media.prop('currentSrc');
if(currentSrc){
$.each(alternateSrces.groups, function(groupName, group){
if(group.srces.indexOf(currentSrc) != -1){
ret = group;
}
});
} else {
for(prop in alternateSrces.groups){
ret = alternateSrces[prop];
break;
}
}
return ret;
}
});
jme.defineMethod('getAlternateSrcData', function(srces){
var ret = {groups: {}, groupLength: 0};
var data = jme.data(this);
if(!srces){
srces = data.media.jmeProp('srces');
}
srces.forEach(function(src){
var group = src['data-alternate'];
if(!ret.groups[group]){
ret.groupLength++;
ret.groups[group] = {
group: group,
label: group,
srces: []
};
}
if(src['data-label'] || src.title){
ret.groups[group].label = src['data-label'] || src.title;
}
ret.groups[group].srces.push(src.src);
});
ret.srces = srces;
return ret;
});
jme.defineMethod('orderAlternateByName', function(names, srces){
var data = jme.data(this);
if(!srces){
srces = data.media.jmeProp('srces');
}
if(!Array.isArray(names)){
names = [names];
}
names.reverse();
srces.sort(function(src1, src2){
return names.indexOf(src2['data-alternate']) - names.indexOf(src1['data-alternate']);
});
data.media.jmeProp('srces', srces);
return srces;
});
jme.defineMethod('switchAlternateByName', function(names, srces){
var data = jme.data(this);
var isPaused = data.media.prop('paused');
var currentTime = data.media.prop('currentTime');
$(this).jmeFn('orderAlternateByName', names, srces);
if(currentTime > 1){
data.media.play();
data.media.one('loadedmetadata', function(){
if(isPaused){
data.media.pause();
}
data.media.prop('currentTime', currentTime);
});
}
if(!isPaused){
data.media.play();
}
});
function flattenSrces(src){
return src.src || src;
}
function isSameSrces(newSrces, oldScres){
var ret = true;
if(oldScres && newSrces.length === oldScres.length){
newSrces = newSrces.map(flattenSrces);
$.each(oldScres, function(i, src){
if(newSrces.indexOf(src.src || src) == -1){
ret = false;
return false;
}
});
} else {
ret = false;
}
return ret;
}
var radioGroup = 0;
function createGroupList(group){
return '<li role="presentation"><label><input type="radio" name="alternate-'+ radioGroup +'" value="'+ group.group +'" /><span>'+ group.label +'</span></label></li>';
}
jme.addToConfigmenu('alternate-media', function($container, media, base, menu){
var $menu, timer, alternateSrcData;
var itemChange = function(e){
var value = $.prop(e.target, 'value');
if(value && alternateSrcData && alternateSrcData.groups[value]){
media.jmeFn('switchAlternateByName', value, alternateSrcData.srces);
menu.hide();
}
};
var updateMenuItem = function(){
var current;
if($menu){
current = media.jmeProp('currentAlternateSrc');
if(current && current.group){
$('[value="'+ current.group +'"]', $menu).prop('checked', true);
}
}
};
var updateMenu = function(data){
if(!$menu || !alternateSrcData || !isSameSrces(data.srces, alternateSrcData.srces)){
alternateSrcData = data;
radioGroup++;
var list = $.map(alternateSrcData.groups, createGroupList);
if($menu){
$menu.remove();
}
$menu = $('<div class="media-submenu"><ul>'+ list.join('') +'</ul></div>').appendTo($container);
$menu.on('change', itemChange);
}
updateMenuItem();
};
var addRemoveMenu = function(){
var data = media.jmeFn('getAlternateSrcData');
if(data.groupLength){
updateMenu(data);
} else if($menu) {
$menu.remove();
$menu = null;
alternateSrcData = null;
}
};
var timedAddRemove = function(){
clearTimeout(timer);
timer = setTimeout(addRemoveMenu);
};
addRemoveMenu();
media.on('loadstart emptied', timedAddRemove);
media.on('loadedmetadata', updateMenuItem);
});
webshim.ready('jme-base', function(){
webshim.isReady('alternate-media', true);
});
});