new postMessage-based notes plugin, moved node-based notes to notes-server (#190)

plugin/notes/notes.js

@@ -0,0 +1,74 @@
+/**
+ * Handles opening of and synchronization with the reveal.js
+ * notes window.
+ */
+var RevealNotes = (function() {
+
+	function openNotes() {
+		var notesPopup = window.open( 'plugin/notes/notes.html', 'reveal.js - Notes', 'width=1120,height=850' );
+
+		Reveal.addEventListener( 'slidechanged', post );
+
+		// Posts the current slide data to the notes window
+		function post() {
+			var slideElement = Reveal.getCurrentSlide(),
+				indexh = Reveal.getIndices().h,
+				indexv = Reveal.getIndices().v,
+				nextindexh,
+				nextindexv;
+
+			if( slideElement.nextElementSibling && slideElement.parentNode.nodeName == 'SECTION' ) {
+				nextindexh = indexh;
+				nextindexv = indexv + 1;
+			} else {
+				nextindexh = indexh + 1;
+				nextindexv = 0;
+			}
+
+			var notes = slideElement.querySelector( 'aside.notes' );
+
+			var slideData = {
+				notes : notes ? notes.innerHTML : '',
+				indexh : indexh,
+				indexv : indexv,
+				nextindexh : nextindexh,
+				nextindexv : nextindexv,
+				markdown : notes ? typeof notes.getAttribute( 'data-markdown' ) === 'string' : false
+			};
+
+			notesPopup.postMessage( JSON.stringify( slideData ), '*' );
+		}
+
+		// The main presentation is kept in sync when navigating the 
+		// note slides so that the popup may be used as a remote
+		window.addEventListener( 'message', function( event ) {
+			var data = JSON.parse( event.data );
+
+			if( data && typeof data.indexh === 'number' && typeof data.indexv === 'number' ) {
+				Reveal.slide( data.indexh, data.indexv );
+			}
+		} );
+
+		// Navigate to the current slide when the notes are loaded
+		notesPopup.addEventListener( 'load', 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 }
+})();