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(function() {
// don't emit events from inside the previews themselves
if( window.location.search.match( /receiver/gi ) ) { return; }
var socket = io.connect( window.location.origin ),
socketId = Math.random().toString().slice( 2 );
console.log( 'View slide notes at ' + window.location.origin + '/notes/' + socketId );
window.open( window.location.origin + '/notes/' + socketId, 'notes-' + socketId );
/**
* Posts the current slide data to the notes window
*/
function post() {
var slideElement = Reveal.getCurrentSlide(),
notesElement = slideElement.querySelector( 'aside.notes' );
var messageData = {
notes: '',
markdown: false,
socketId: socketId,
state: Reveal.getState()
};
// Look for notes defined in a slide attribute
if( slideElement.hasAttribute( 'data-notes' ) ) {
messageData.notes = slideElement.getAttribute( 'data-notes' );
}
// Look for notes defined in an aside element
if( notesElement ) {
messageData.notes = notesElement.innerHTML;
messageData.markdown = typeof notesElement.getAttribute( 'data-markdown' ) === 'string';
}
socket.emit( 'statechanged', messageData );
}
// When a new notes window connects, post our current state
socket.on( 'new-subscriber', function( data ) {
post();
} );
// Monitor events that trigger a change in state
Reveal.addEventListener( 'slidechanged', post );
Reveal.addEventListener( 'fragmentshown', post );
Reveal.addEventListener( 'fragmenthidden', post );
Reveal.addEventListener( 'overviewhidden', post );
Reveal.addEventListener( 'overviewshown', post );
Reveal.addEventListener( 'paused', post );
Reveal.addEventListener( 'resumed', post );
// Post the initial state
post();
}());
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