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impress-notes.js
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impress-notes.js
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/**
* Slight modification of impress.js notes from David Souther.
*
* Adds support for inline speaker notes.
*
* MIT Licensed.
*
* Copyright 2012 David Souther (davidsouther@gmail.com)
* Modified by Justin Grant (jlgrock@hotmial.com)
*/
(function ( document, window ) {
'use strict';
var globalImpress = impress();
//We have a child!
var notesWindow = null;
//Some default HTML, if there's no template.
var notesTemplate = document.getElementById('impress-notes-template') ?
document.byId('notesTemplate').innerHTML :
'<div class="controls"> ' +
'<a href="#" onclick="impress().prev(); return false;" />Prev</a>' +
'<a href="#" onclick="impress().next(); return false;" style="float:right;"/>Next</a>' +
'</div>' +
'<div id="notes" style="text-align: justify;"></div>' +
'<div class="controls"> ' +
'<a href="#" onclick="impress().prev(); return false;" />Prev</a>' +
'<a href="#" onclick="impress().next(); return false;" style="float:right;"/>Next</a>' +
'</div>';
//Add a new function to the impress() object.
//SIDE EFFECT: If impress hasn't already run, it just got initialized.
//TODO look at what to do if there are multiple impress roots.
globalImpress.openNotes = function(){
if(notesWindow && !notesWindow.closed) {
notesWindow.focus();
} else {
notesWindow = window.open();
notesWindow.document.title = "Impress.js Speaker Notes (" + document.title + ")";
notesWindow.impress = window.impress;
notesWindow.document.body.innerHTML = notesTemplate;
notesWindow.document.addEventListener("keydown", function ( event ) {
switch( event.keyCode ) {
case 8: ; // backspace
case 33: ; // pg up
case 37: ; // left
case 38: // up
impress().prev();
break;
case 9: ; // tab
case 32: ; // space
case 34: ; // pg down
case 39: ; // right
case 40: // down
impress().next();
break;
default: break;
}
event.preventDefault();
}, false);
slideChange();
}
};
// Replace the HTML
var slideChange = function(){
if(notesWindow) {
notesWindow.document.getElementById('notes').innerHTML =
document.querySelector('.active .notes').innerHTML;
}
};
var currentNext = globalImpress.next;
var impressNextOverride = function() {
currentNext();
slideChange();
};
globalImpress.next = impressNextOverride;
var currentPrev = globalImpress.prev;
var impressPrevOverride = function() {
currentPrev();
slideChange();
};
globalImpress.prev = impressPrevOverride;
//When the window closes, clean up after ourselves.
window.onunload = function(){
if (notesWindow && !notesWindow.closed) {
notesWindow.close();
}
};
//Open speaker notes when they press 'n'
document.addEventListener("keyup", function ( event ) {
if ( event.keyCode === 78 ) {
impress().openNotes();
}
}, false);
//If they set the notesOnStartup to the window's impress object, start it
if(impress.notesOnStartup) {
impress().openNotes();
}
})(document, window);