107 lines
3.0 KiB
JavaScript
107 lines
3.0 KiB
JavaScript
/**
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* Handles opening of and synchronization with the reveal.js
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* notes window.
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*/
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var RevealNotes = (function() {
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function openNotes() {
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var notesPopup = window.open( 'plugin/notes/notes.html', 'reveal.js - Notes', 'width=1120,height=850' );
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// Fires when slide is changed
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Reveal.addEventListener( 'slidechanged', function( event ) {
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post('slidechanged');
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} );
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// Fires when a fragment is shown
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Reveal.addEventListener( 'fragmentshown', function( event ) {
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post('fragmentshown');
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} );
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// Fires when a fragment is hidden
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Reveal.addEventListener( 'fragmenthidden', function( event ) {
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post('fragmenthidden');
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} );
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/**
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* @description Posts the current slide data to the notes window
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*
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* @param {string} eventType Expecting 'slidechanged', 'fragmentshown' or 'fragmenthidden'
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* set in the events above to define the needed slideDate.
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*/
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function post(eventType) {
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var slideElement = Reveal.getCurrentSlide(),
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indexh = Reveal.getIndices().h,
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indexv = Reveal.getIndices().v,
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notes = slideElement.querySelector( 'aside.notes' ),
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nextindexh,
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nextindexv,
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slideData;
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if( slideElement.nextElementSibling && slideElement.parentNode.nodeName == 'SECTION' ) {
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nextindexh = indexh;
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nextindexv = indexv + 1;
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} else {
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nextindexh = indexh + 1;
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nextindexv = 0;
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}
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if (eventType === 'slidechanged') {
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slideData = {
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notes : notes ? notes.innerHTML : '',
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indexh : indexh,
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indexv : indexv,
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nextindexh : nextindexh,
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nextindexv : nextindexv,
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markdown : notes ? typeof notes.getAttribute( 'data-markdown' ) === 'string' : false
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};
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}
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else if (eventType === 'fragmentshown') {
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slideData = {
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fragment : 'next'
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};
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}
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else if (eventType === 'fragmenthidden') {
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slideData = {
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fragment : 'prev'
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};
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}
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notesPopup.postMessage( JSON.stringify( slideData ), '*' );
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}
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// The main presentation is kept in sync when navigating the
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// note slides so that the popup may be used as a remote
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window.addEventListener( 'message', function( event ) {
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var data = JSON.parse( event.data );
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if( data && typeof data.indexh === 'number' && typeof data.indexv === 'number' ) {
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Reveal.slide( data.indexh, data.indexv );
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}
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} );
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// Navigate to the current slide when the notes are loaded
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notesPopup.addEventListener( 'load', function( event ) {
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post('slidechanged');
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}, false );
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}
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// If the there's a 'notes' query set, open directly
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if( window.location.search.match(/(\?|\&)notes/gi ) !== null ) {
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openNotes();
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}
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// Open the notes when the 's' key is hit
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document.addEventListener( 'keydown', function( event ) {
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// Disregard the event if the target is editable or a
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// modifier is present
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if ( document.querySelector( ':focus' ) !== null || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
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if( event.keyCode === 83 ) {
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event.preventDefault();
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openNotes();
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}
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}, false );
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return { open: openNotes };
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})();
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