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/**
* Handles opening of and synchronization with the reveal.js
* notes window.
*/
var RevealNotes = (function() {
function openNotes() {
var jsFileLocation = document.querySelector('script[src$="notes.js"]').src; // this js file path
jsFileLocation = jsFileLocation.replace(/notes\.js(\?.*)?$/, ''); // the js folder path
var notesPopup = window.open( jsFileLocation + 'notes.html', 'reveal.js - Notes', 'width=1120,height=850' );
// Fires when slide is changed
Reveal.addEventListener( 'slidechanged', post );
// Fires when a fragment is shown
Reveal.addEventListener( 'fragmentshown', post );
// Fires when a fragment is hidden
Reveal.addEventListener( 'fragmenthidden', post );
/**
* Posts the current slide data to the notes window
*/
function post() {
var slideElement = Reveal.getCurrentSlide(),
slideIndices = Reveal.getIndices(),
messageData;
var notes = slideElement.querySelector( 'aside.notes' ),
nextindexh,
nextindexv;
if( slideElement.nextElementSibling && slideElement.parentNode.nodeName == 'SECTION' ) {
nextindexh = slideIndices.h;
nextindexv = slideIndices.v + 1;
} else {
nextindexh = slideIndices.h + 1;
nextindexv = 0;
}
messageData = {
notes : notes ? notes.innerHTML : '',
indexh : slideIndices.h,
indexv : slideIndices.v,
indexf : slideIndices.f,
nextindexh : nextindexh,
nextindexv : nextindexv,
markdown : notes ? typeof notes.getAttribute( 'data-markdown' ) === 'string' : false
};
notesPopup.postMessage( JSON.stringify( messageData ), '*' );
}
// Navigate to the current slide when the notes are loaded
notesPopup.addEventListener( 'load', function( event ) {
post();
}, false );
}
// If the there's a 'notes' query set, open directly
if( window.location.search.match( /(\?|\&)notes/gi ) !== null ) {
openNotes();
}
// Open the notes when the 's' key is hit
document.addEventListener( 'keydown', function( event ) {
// Disregard the event if the target is editable or a
// modifier is present
if ( document.querySelector( ':focus' ) !== null || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
if( event.keyCode === 83 ) {
event.preventDefault();
openNotes();
}
}, false );
return { open: openNotes };
})();
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