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add autoPlayMedia config option, overrides individual autoplay settings

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This commit is contained in:
Hakim El Hattab 2017-03-23 11:44:02 +01:00
parent 7e6fb9ec87
commit a0a3b4f80d
2 changed files with 45 additions and 14 deletions
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18
README.md
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@ -228,6 +228,12 @@ Reveal.initialize({
// Flags if speaker notes should be visible to all viewers
showNotes: false,
// Global override for autolaying embedded media (video/audio/iframe)
// - null: Media will only autoplay if data-autoplay is present
// - true: All media will autoplay, regardless of individual setting
// - false: No media will autoplay, regardless of individual setting
autoPlayMedia: null,
// Number of milliseconds between automatically proceeding to the
// next slide, disabled when set to 0, this value can be overwritten
// by using a data-autoslide attribute on your slides
@ -789,20 +795,26 @@ Reveal.addEventListener( 'overviewhidden', function( event ) { /* ... */ } );
Reveal.toggleOverview();
```
### Fullscreen mode
Just press »F« on your keyboard to show your presentation in fullscreen mode. Press the »ESC« key to exit fullscreen mode.
### Embedded media
Embedded HTML5 `<video>`/`<audio>` and YouTube iframes are automatically paused when you navigate away from a slide. This can be disabled by decorating your element with a `data-ignore` attribute.
Add `data-autoplay` to your media element if you want it to automatically start playing when the slide is shown:
```html
<video data-autoplay src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"></video>
```
Additionally the framework automatically pushes two [post messages](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage) to all iframes, ```slide:start``` when the slide containing the iframe is made visible and ```slide:stop``` when it is hidden.
If you want to enable or disable autoplay globally, for all embedded media, you can use the `autoPlayMedia` configuration option. If you set this to `true` ALL media will autoplay regardless of individual `data-autoplay` attributes. If you initialize with `autoPlayMedia: false` NO media will autoplay.
Note that embedded HTML5 `<video>`/`<audio>` and YouTube/Vimeo iframes are automatically paused when you navigate away from a slide. This can be disabled by decorating your element with a `data-ignore` attribute.
### Embedded iframes
reveal.js automatically pushes two [post messages](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage) to embedded iframes. ```slide:start``` when the slide containing the iframe is made visible and ```slide:stop``` when it is hidden.
### Stretching elements

41
js/reveal.js
View File

@ -105,6 +105,12 @@
// Flags if speaker notes should be visible to all viewers
showNotes: false,
// Global override for autolaying embedded media (video/audio/iframe)
// - null: Media will only autoplay if data-autoplay is present
// - true: All media will autoplay, regardless of individual setting
// - false: No media will autoplay, regardless of individual setting
autoPlayMedia: null,
// Number of milliseconds between automatically proceeding to the
// next slide, disabled when set to 0, this value can be overwritten
// by using a data-autoslide attribute on your slides
@ -2450,7 +2456,14 @@
updateNotes();
formatEmbeddedContent();
startEmbeddedContent( currentSlide );
// Start or stop embedded content depending on global config
if( config.autoPlayMedia === false ) {
stopEmbeddedContent( currentSlide );
}
else {
startEmbeddedContent( currentSlide );
}
if( isOverview() ) {
layoutOverview();
@ -3249,24 +3262,23 @@
return;
}
// Autoplay is always on for slide backgrounds
var autoplay = el.hasAttribute( 'data-autoplay' ) ||
el.hasAttribute( 'data-paused-by-reveal' ) ||
!!closestParent( el, '.slide-background' );
// Prefer an explicit global autoplay setting
var autoplay = config.autoPlayMedia;
// If no global setting is available, fall back on the element's
// own autoplay setting
if( typeof autoplay !== 'boolean' ) {
autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
}
if( autoplay && typeof el.play === 'function' ) {
el.removeAttribute( 'data-paused-by-reveal' );
if( el.readyState > 1 ) {
startEmbeddedMedia( { target: el } );
}
else {
el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes
el.addEventListener( 'loadeddata', startEmbeddedMedia );
// `loadeddata` never fires unless we start playing on iPad
if( /ipad/gi.test( UA ) ) el.play();
}
}
@ -3335,7 +3347,14 @@
if( isAttachedToDOM && isVisible ) {
var autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
// Prefer an explicit global autoplay setting
var autoplay = config.autoPlayMedia;
// If no global setting is available, fall back on the element's
// own autoplay setting
if( typeof autoplay !== 'boolean' ) {
autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
}
// YouTube postMessage API
if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {