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korap.ids-mannheim.de / IDS-Mannheim / revealjs / 8afae13d17239edd07e72fd2009094493371d4c3 / . / inst / reveal.js-4.2.1 / plugin / notes / speaker-view.html
blob: b68fee4da6117750fbeb3868cf9d934676afa046 [file] [log] [blame]
Christophe Dervieuxe1893ae2021-10-07 17:09:02 +0200[diff] [blame]1<html lang="en">
2 <head>
3 <meta charset="utf-8">
4
5 <title>reveal.js - Speaker View</title>
6
7 <style>
8 body {
9 font-family: Helvetica;
10 font-size: 18px;
11 }
12
13 #current-slide,
14 #upcoming-slide,
15 #speaker-controls {
16 padding: 6px;
17 box-sizing: border-box;
18 -moz-box-sizing: border-box;
19 }
20
21 #current-slide iframe,
22 #upcoming-slide iframe {
23 width: 100%;
24 height: 100%;
25 border: 1px solid #ddd;
26 }
27
28 #current-slide .label,
29 #upcoming-slide .label {
30 position: absolute;
31 top: 10px;
32 left: 10px;
33 z-index: 2;
34 }
35
36 #connection-status {
37 position: absolute;
38 top: 0;
39 left: 0;
40 width: 100%;
41 height: 100%;
42 z-index: 20;
43 padding: 30% 20% 20% 20%;
44 font-size: 18px;
45 color: #222;
46 background: #fff;
47 text-align: center;
48 box-sizing: border-box;
49 line-height: 1.4;
50 }
51
52 .overlay-element {
53 height: 34px;
54 line-height: 34px;
55 padding: 0 10px;
56 text-shadow: none;
57 background: rgba( 220, 220, 220, 0.8 );
58 color: #222;
59 font-size: 14px;
60 }
61
62 .overlay-element.interactive:hover {
63 background: rgba( 220, 220, 220, 1 );
64 }
65
66 #current-slide {
67 position: absolute;
68 width: 60%;
69 height: 100%;
70 top: 0;
71 left: 0;
72 padding-right: 0;
73 }
74
75 #upcoming-slide {
76 position: absolute;
77 width: 40%;
78 height: 40%;
79 right: 0;
80 top: 0;
81 }
82
83 /* Speaker controls */
84 #speaker-controls {
85 position: absolute;
86 top: 40%;
87 right: 0;
88 width: 40%;
89 height: 60%;
90 overflow: auto;
91 font-size: 18px;
92 }
93
94 .speaker-controls-time.hidden,
95 .speaker-controls-notes.hidden {
96 display: none;
97 }
98
99 .speaker-controls-time .label,
100 .speaker-controls-pace .label,
101 .speaker-controls-notes .label {
102 text-transform: uppercase;
103 font-weight: normal;
104 font-size: 0.66em;
105 color: #666;
106 margin: 0;
107 }
108
109 .speaker-controls-time, .speaker-controls-pace {
110 border-bottom: 1px solid rgba( 200, 200, 200, 0.5 );
111 margin-bottom: 10px;
112 padding: 10px 16px;
113 padding-bottom: 20px;
114 cursor: pointer;
115 }
116
117 .speaker-controls-time .reset-button {
118 opacity: 0;
119 float: right;
120 color: #666;
121 text-decoration: none;
122 }
123 .speaker-controls-time:hover .reset-button {
124 opacity: 1;
125 }
126
127 .speaker-controls-time .timer,
128 .speaker-controls-time .clock {
129 width: 50%;
130 }
131
132 .speaker-controls-time .timer,
133 .speaker-controls-time .clock,
134 .speaker-controls-time .pacing .hours-value,
135 .speaker-controls-time .pacing .minutes-value,
136 .speaker-controls-time .pacing .seconds-value {
137 font-size: 1.9em;
138 }
139
140 .speaker-controls-time .timer {
141 float: left;
142 }
143
144 .speaker-controls-time .clock {
145 float: right;
146 text-align: right;
147 }
148
149 .speaker-controls-time span.mute {
150 opacity: 0.3;
151 }
152
153 .speaker-controls-time .pacing-title {
154 margin-top: 5px;
155 }
156
157 .speaker-controls-time .pacing.ahead {
158 color: blue;
159 }
160
161 .speaker-controls-time .pacing.on-track {
162 color: green;
163 }
164
165 .speaker-controls-time .pacing.behind {
166 color: red;
167 }
168
169 .speaker-controls-notes {
170 padding: 10px 16px;
171 }
172
173 .speaker-controls-notes .value {
174 margin-top: 5px;
175 line-height: 1.4;
176 font-size: 1.2em;
177 }
178
179 /* Layout selector */
180 #speaker-layout {
181 position: absolute;
182 top: 10px;
183 right: 10px;
184 color: #222;
185 z-index: 10;
186 }
187 #speaker-layout select {
188 position: absolute;
189 width: 100%;
190 height: 100%;
191 top: 0;
192 left: 0;
193 border: 0;
194 box-shadow: 0;
195 cursor: pointer;
196 opacity: 0;
197
198 font-size: 1em;
199 background-color: transparent;
200
201 -moz-appearance: none;
202 -webkit-appearance: none;
203 -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
204 }
205
206 #speaker-layout select:focus {
207 outline: none;
208 box-shadow: none;
209 }
210
211 .clear {
212 clear: both;
213 }
214
215 /* Speaker layout: Wide */
216 body[data-speaker-layout="wide"] #current-slide,
217 body[data-speaker-layout="wide"] #upcoming-slide {
218 width: 50%;
219 height: 45%;
220 padding: 6px;
221 }
222
223 body[data-speaker-layout="wide"] #current-slide {
224 top: 0;
225 left: 0;
226 }
227
228 body[data-speaker-layout="wide"] #upcoming-slide {
229 top: 0;
230 left: 50%;
231 }
232
233 body[data-speaker-layout="wide"] #speaker-controls {
234 top: 45%;
235 left: 0;
236 width: 100%;
237 height: 50%;
238 font-size: 1.25em;
239 }
240
241 /* Speaker layout: Tall */
242 body[data-speaker-layout="tall"] #current-slide,
243 body[data-speaker-layout="tall"] #upcoming-slide {
244 width: 45%;
245 height: 50%;
246 padding: 6px;
247 }
248
249 body[data-speaker-layout="tall"] #current-slide {
250 top: 0;
251 left: 0;
252 }
253
254 body[data-speaker-layout="tall"] #upcoming-slide {
255 top: 50%;
256 left: 0;
257 }
258
259 body[data-speaker-layout="tall"] #speaker-controls {
260 padding-top: 40px;
261 top: 0;
262 left: 45%;
263 width: 55%;
264 height: 100%;
265 font-size: 1.25em;
266 }
267
268 /* Speaker layout: Notes only */
269 body[data-speaker-layout="notes-only"] #current-slide,
270 body[data-speaker-layout="notes-only"] #upcoming-slide {
271 display: none;
272 }
273
274 body[data-speaker-layout="notes-only"] #speaker-controls {
275 padding-top: 40px;
276 top: 0;
277 left: 0;
278 width: 100%;
279 height: 100%;
280 font-size: 1.25em;
281 }
282
283 @media screen and (max-width: 1080px) {
284 body[data-speaker-layout="default"] #speaker-controls {
285 font-size: 16px;
286 }
287 }
288
289 @media screen and (max-width: 900px) {
290 body[data-speaker-layout="default"] #speaker-controls {
291 font-size: 14px;
292 }
293 }
294
295 @media screen and (max-width: 800px) {
296 body[data-speaker-layout="default"] #speaker-controls {
297 font-size: 12px;
298 }
299 }
300
301 </style>
302 </head>
303
304 <body>
305
306 <div id="connection-status">Loading speaker view...</div>
307
308 <div id="current-slide"></div>
309 <div id="upcoming-slide"><span class="overlay-element label">Upcoming</span></div>
310 <div id="speaker-controls">
311 <div class="speaker-controls-time">
312 <h4 class="label">Time <span class="reset-button">Click to Reset</span></h4>
313 <div class="clock">
314 <span class="clock-value">0:00 AM</span>
315 </div>
316 <div class="timer">
317 <span class="hours-value">00</span><span class="minutes-value">:00</span><span class="seconds-value">:00</span>
318 </div>
319 <div class="clear"></div>
320
321 <h4 class="label pacing-title" style="display: none">Pacing – Time to finish current slide</h4>
322 <div class="pacing" style="display: none">
323 <span class="hours-value">00</span><span class="minutes-value">:00</span><span class="seconds-value">:00</span>
324 </div>
325 </div>
326
327 <div class="speaker-controls-notes hidden">
328 <h4 class="label">Notes</h4>
329 <div class="value"></div>
330 </div>
331 </div>
332 <div id="speaker-layout" class="overlay-element interactive">
333 <span class="speaker-layout-label"></span>
334 <select class="speaker-layout-dropdown"></select>
335 </div>
336
337 <script>
338
339 (function() {
340
341 var notes,
342 notesValue,
343 currentState,
344 currentSlide,
345 upcomingSlide,
346 layoutLabel,
347 layoutDropdown,
348 pendingCalls = {},
349 lastRevealApiCallId = 0,
350 connected = false;
351
352 var SPEAKER_LAYOUTS = {
353 'default': 'Default',
354 'wide': 'Wide',
355 'tall': 'Tall',
356 'notes-only': 'Notes only'
357 };
358
359 setupLayout();
360
361 var connectionStatus = document.querySelector( '#connection-status' );
362 var connectionTimeout = setTimeout( function() {
363 connectionStatus.innerHTML = 'Error connecting to main window.<br>Please try closing and reopening the speaker view.';
364 }, 5000 );
365
366 window.addEventListener( 'message', function( event ) {
367
368 clearTimeout( connectionTimeout );
369 connectionStatus.style.display = 'none';
370
371 var data = JSON.parse( event.data );
372
373 // The overview mode is only useful to the reveal.js instance
374 // where navigation occurs so we don't sync it
375 if( data.state ) delete data.state.overview;
376
377 // Messages sent by the notes plugin inside of the main window
378 if( data && data.namespace === 'reveal-notes' ) {
379 if( data.type === 'connect' ) {
380 handleConnectMessage( data );
381 }
382 else if( data.type === 'state' ) {
383 handleStateMessage( data );
384 }
385 else if( data.type === 'return' ) {
386 pendingCalls[data.callId](data.result);
387 delete pendingCalls[data.callId];
388 }
389 }
390 // Messages sent by the reveal.js inside of the current slide preview
391 else if( data && data.namespace === 'reveal' ) {
392 if( /ready/.test( data.eventName ) ) {
393 // Send a message back to notify that the handshake is complete
394 window.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'connected'} ), '*' );
395 }
396 else if( /slidechanged|fragmentshown|fragmenthidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {
397
398 window.opener.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ]} ), '*' );
399
400 }
401 }
402
403 } );
404
405 /**
406 * Asynchronously calls the Reveal.js API of the main frame.
407 */
408 function callRevealApi( methodName, methodArguments, callback ) {
409
410 var callId = ++lastRevealApiCallId;
411 pendingCalls[callId] = callback;
412 window.opener.postMessage( JSON.stringify( {
413 namespace: 'reveal-notes',
414 type: 'call',
415 callId: callId,
416 methodName: methodName,
417 arguments: methodArguments
418 } ), '*' );
419
420 }
421
422 /**
423 * Called when the main window is trying to establish a
424 * connection.
425 */
426 function handleConnectMessage( data ) {
427
428 if( connected === false ) {
429 connected = true;
430
431 setupIframes( data );
432 setupKeyboard();
433 setupNotes();
434 setupTimer();
435 }
436
437 }
438
439 /**
440 * Called when the main window sends an updated state.
441 */
442 function handleStateMessage( data ) {
443
444 // Store the most recently set state to avoid circular loops
445 // applying the same state
446 currentState = JSON.stringify( data.state );
447
448 // No need for updating the notes in case of fragment changes
449 if ( data.notes ) {
450 notes.classList.remove( 'hidden' );
451 notesValue.style.whiteSpace = data.whitespace;
452 if( data.markdown ) {
453 notesValue.innerHTML = marked( data.notes );
454 }
455 else {
456 notesValue.innerHTML = data.notes;
457 }
458 }
459 else {
460 notes.classList.add( 'hidden' );
461 }
462
463 // Update the note slides
464 currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
465 upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
466 upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'next' }), '*' );
467
468 }
469
470 // Limit to max one state update per X ms
471 handleStateMessage = debounce( handleStateMessage, 200 );
472
473 /**
474 * Forward keyboard events to the current slide window.
475 * This enables keyboard events to work even if focus
476 * isn't set on the current slide iframe.
477 *
478 * Block F5 default handling, it reloads and disconnects
479 * the speaker notes window.
480 */
481 function setupKeyboard() {
482
483 document.addEventListener( 'keydown', function( event ) {
484 if( event.keyCode === 116 || ( event.metaKey && event.keyCode === 82 ) ) {
485 event.preventDefault();
486 return false;
487 }
488 currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'triggerKey', args: [ event.keyCode ] }), '*' );
489 } );
490
491 }
492
493 /**
494 * Creates the preview iframes.
495 */
496 function setupIframes( data ) {
497
498 var params = [
499 'receiver',
500 'progress=false',
501 'history=false',
502 'transition=none',
503 'autoSlide=0',
504 'backgroundTransition=none'
505 ].join( '&' );
506
507 var urlSeparator = /\?/.test(data.url) ? '&' : '?';
508 var hash = '#/' + data.state.indexh + '/' + data.state.indexv;
509 var currentURL = data.url + urlSeparator + params + '&postMessageEvents=true' + hash;
510 var upcomingURL = data.url + urlSeparator + params + '&controls=false' + hash;
511
512 currentSlide = document.createElement( 'iframe' );
513 currentSlide.setAttribute( 'width', 1280 );
514 currentSlide.setAttribute( 'height', 1024 );
515 currentSlide.setAttribute( 'src', currentURL );
516 document.querySelector( '#current-slide' ).appendChild( currentSlide );
517
518 upcomingSlide = document.createElement( 'iframe' );
519 upcomingSlide.setAttribute( 'width', 640 );
520 upcomingSlide.setAttribute( 'height', 512 );
521 upcomingSlide.setAttribute( 'src', upcomingURL );
522 document.querySelector( '#upcoming-slide' ).appendChild( upcomingSlide );
523
524 }
525
526 /**
527 * Setup the notes UI.
528 */
529 function setupNotes() {
530
531 notes = document.querySelector( '.speaker-controls-notes' );
532 notesValue = document.querySelector( '.speaker-controls-notes .value' );
533
534 }
535
536 function getTimings( callback ) {
537
538 callRevealApi( 'getSlidesAttributes', [], function ( slideAttributes ) {
539 callRevealApi( 'getConfig', [], function ( config ) {
540 var totalTime = config.totalTime;
541 var minTimePerSlide = config.minimumTimePerSlide || 0;
542 var defaultTiming = config.defaultTiming;
543 if ((defaultTiming == null) && (totalTime == null)) {
544 callback(null);
545 return;
546 }
547 // Setting totalTime overrides defaultTiming
548 if (totalTime) {
549 defaultTiming = 0;
550 }
551 var timings = [];
552 for ( var i in slideAttributes ) {
553 var slide = slideAttributes[ i ];
554 var timing = defaultTiming;
555 if( slide.hasOwnProperty( 'data-timing' )) {
556 var t = slide[ 'data-timing' ];
557 timing = parseInt(t);
558 if( isNaN(timing) ) {
559 console.warn("Could not parse timing '" + t + "' of slide " + i + "; using default of " + defaultTiming);
560 timing = defaultTiming;
561 }
562 }
563 timings.push(timing);
564 }
565 if ( totalTime ) {
566 // After we've allocated time to individual slides, we summarize it and
567 // subtract it from the total time
568 var remainingTime = totalTime - timings.reduce( function(a, b) { return a + b; }, 0 );
569 // The remaining time is divided by the number of slides that have 0 seconds
570 // allocated at the moment, giving the average time-per-slide on the remaining slides
571 var remainingSlides = (timings.filter( function(x) { return x == 0 }) ).length
572 var timePerSlide = Math.round( remainingTime / remainingSlides, 0 )
573 // And now we replace every zero-value timing with that average
574 timings = timings.map( function(x) { return (x==0 ? timePerSlide : x) } );
575 }
576 var slidesUnderMinimum = timings.filter( function(x) { return (x < minTimePerSlide) } ).length
577 if ( slidesUnderMinimum ) {
578 message = "The pacing time for " + slidesUnderMinimum + " slide(s) is under the configured minimum of " + minTimePerSlide + " seconds. Check the data-timing attribute on individual slides, or consider increasing the totalTime or minimumTimePerSlide configuration options (or removing some slides).";
579 alert(message);
580 }
581 callback( timings );
582 } );
583 } );
584
585 }
586
587 /**
588 * Return the number of seconds allocated for presenting
589 * all slides up to and including this one.
590 */
591 function getTimeAllocated( timings, callback ) {
592
593 callRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {
594 var allocated = 0;
595 for (var i in timings.slice(0, currentSlide + 1)) {
596 allocated += timings[i];
597 }
598 callback( allocated );
599 } );
600
601 }
602
603 /**
604 * Create the timer and clock and start updating them
605 * at an interval.
606 */
607 function setupTimer() {
608
609 var start = new Date(),
610 timeEl = document.querySelector( '.speaker-controls-time' ),
611 clockEl = timeEl.querySelector( '.clock-value' ),
612 hoursEl = timeEl.querySelector( '.hours-value' ),
613 minutesEl = timeEl.querySelector( '.minutes-value' ),
614 secondsEl = timeEl.querySelector( '.seconds-value' ),
615 pacingTitleEl = timeEl.querySelector( '.pacing-title' ),
616 pacingEl = timeEl.querySelector( '.pacing' ),
617 pacingHoursEl = pacingEl.querySelector( '.hours-value' ),
618 pacingMinutesEl = pacingEl.querySelector( '.minutes-value' ),
619 pacingSecondsEl = pacingEl.querySelector( '.seconds-value' );
620
621 var timings = null;
622 getTimings( function ( _timings ) {
623
624 timings = _timings;
625 if (_timings !== null) {
626 pacingTitleEl.style.removeProperty('display');
627 pacingEl.style.removeProperty('display');
628 }
629
630 // Update once directly
631 _updateTimer();
632
633 // Then update every second
634 setInterval( _updateTimer, 1000 );
635
636 } );
637
638
639 function _resetTimer() {
640
641 if (timings == null) {
642 start = new Date();
643 _updateTimer();
644 }
645 else {
646 // Reset timer to beginning of current slide
647 getTimeAllocated( timings, function ( slideEndTimingSeconds ) {
648 var slideEndTiming = slideEndTimingSeconds * 1000;
649 callRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {
650 var currentSlideTiming = timings[currentSlide] * 1000;
651 var previousSlidesTiming = slideEndTiming - currentSlideTiming;
652 var now = new Date();
653 start = new Date(now.getTime() - previousSlidesTiming);
654 _updateTimer();
655 } );
656 } );
657 }
658
659 }
660
661 timeEl.addEventListener( 'click', function() {
662 _resetTimer();
663 return false;
664 } );
665
666 function _displayTime( hrEl, minEl, secEl, time) {
667
668 var sign = Math.sign(time) == -1 ? "-" : "";
669 time = Math.abs(Math.round(time / 1000));
670 var seconds = time % 60;
671 var minutes = Math.floor( time / 60 ) % 60 ;
672 var hours = Math.floor( time / ( 60 * 60 )) ;
673 hrEl.innerHTML = sign + zeroPadInteger( hours );
674 if (hours == 0) {
675 hrEl.classList.add( 'mute' );
676 }
677 else {
678 hrEl.classList.remove( 'mute' );
679 }
680 minEl.innerHTML = ':' + zeroPadInteger( minutes );
681 if (hours == 0 && minutes == 0) {
682 minEl.classList.add( 'mute' );
683 }
684 else {
685 minEl.classList.remove( 'mute' );
686 }
687 secEl.innerHTML = ':' + zeroPadInteger( seconds );
688 }
689
690 function _updateTimer() {
691
692 var diff, hours, minutes, seconds,
693 now = new Date();
694
695 diff = now.getTime() - start.getTime();
696
697 clockEl.innerHTML = now.toLocaleTimeString( 'en-US', { hour12: true, hour: '2-digit', minute:'2-digit' } );
698 _displayTime( hoursEl, minutesEl, secondsEl, diff );
699 if (timings !== null) {
700 _updatePacing(diff);
701 }
702
703 }
704
705 function _updatePacing(diff) {
706
707 getTimeAllocated( timings, function ( slideEndTimingSeconds ) {
708 var slideEndTiming = slideEndTimingSeconds * 1000;
709
710 callRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {
711 var currentSlideTiming = timings[currentSlide] * 1000;
712 var timeLeftCurrentSlide = slideEndTiming - diff;
713 if (timeLeftCurrentSlide < 0) {
714 pacingEl.className = 'pacing behind';
715 }
716 else if (timeLeftCurrentSlide < currentSlideTiming) {
717 pacingEl.className = 'pacing on-track';
718 }
719 else {
720 pacingEl.className = 'pacing ahead';
721 }
722 _displayTime( pacingHoursEl, pacingMinutesEl, pacingSecondsEl, timeLeftCurrentSlide );
723 } );
724 } );
725 }
726
727 }
728
729 /**
730 * Sets up the speaker view layout and layout selector.
731 */
732 function setupLayout() {
733
734 layoutDropdown = document.querySelector( '.speaker-layout-dropdown' );
735 layoutLabel = document.querySelector( '.speaker-layout-label' );
736
737 // Render the list of available layouts
738 for( var id in SPEAKER_LAYOUTS ) {
739 var option = document.createElement( 'option' );
740 option.setAttribute( 'value', id );
741 option.textContent = SPEAKER_LAYOUTS[ id ];
742 layoutDropdown.appendChild( option );
743 }
744
745 // Monitor the dropdown for changes
746 layoutDropdown.addEventListener( 'change', function( event ) {
747
748 setLayout( layoutDropdown.value );
749
750 }, false );
751
752 // Restore any currently persisted layout
753 setLayout( getLayout() );
754
755 }
756
757 /**
758 * Sets a new speaker view layout. The layout is persisted
759 * in local storage.
760 */
761 function setLayout( value ) {
762
763 var title = SPEAKER_LAYOUTS[ value ];
764
765 layoutLabel.innerHTML = 'Layout' + ( title ? ( ': ' + title ) : '' );
766 layoutDropdown.value = value;
767
768 document.body.setAttribute( 'data-speaker-layout', value );
769
770 // Persist locally
771 if( supportsLocalStorage() ) {
772 window.localStorage.setItem( 'reveal-speaker-layout', value );
773 }
774
775 }
776
777 /**
778 * Returns the ID of the most recently set speaker layout
779 * or our default layout if none has been set.
780 */
781 function getLayout() {
782
783 if( supportsLocalStorage() ) {
784 var layout = window.localStorage.getItem( 'reveal-speaker-layout' );
785 if( layout ) {
786 return layout;
787 }
788 }
789
790 // Default to the first record in the layouts hash
791 for( var id in SPEAKER_LAYOUTS ) {
792 return id;
793 }
794
795 }
796
797 function supportsLocalStorage() {
798
799 try {
800 localStorage.setItem('test', 'test');
801 localStorage.removeItem('test');
802 return true;
803 }
804 catch( e ) {
805 return false;
806 }
807
808 }
809
810 function zeroPadInteger( num ) {
811
812 var str = '00' + parseInt( num );
813 return str.substring( str.length - 2 );
814
815 }
816
817 /**
818 * Limits the frequency at which a function can be called.
819 */
820 function debounce( fn, ms ) {
821
822 var lastTime = 0,
823 timeout;
824
825 return function() {
826
827 var args = arguments;
828 var context = this;
829
830 clearTimeout( timeout );
831
832 var timeSinceLastCall = Date.now() - lastTime;
833 if( timeSinceLastCall > ms ) {
834 fn.apply( context, args );
835 lastTime = Date.now();
836 }
837 else {
838 timeout = setTimeout( function() {
839 fn.apply( context, args );
840 lastTime = Date.now();
841 }, ms - timeSinceLastCall );
842 }
843
844 }
845
846 }
847
848 })();
849
850 </script>
851 </body>
852</html>