114 lines
2.6 KiB
JavaScript
114 lines
2.6 KiB
JavaScript
/**
|
|
* Handles the showing and
|
|
*/
|
|
export default class Notes {
|
|
|
|
constructor( Reveal ) {
|
|
|
|
this.Reveal = Reveal;
|
|
|
|
}
|
|
|
|
render() {
|
|
|
|
this.element = document.createElement( 'div' );
|
|
this.element.className = 'speaker-notes';
|
|
this.element.setAttribute( 'data-prevent-swipe', '' );
|
|
this.element.setAttribute( 'tabindex', '0' );
|
|
this.Reveal.getRevealElement().appendChild( this.element );
|
|
|
|
}
|
|
|
|
/**
|
|
* Called when the reveal.js config is updated.
|
|
*/
|
|
configure( config, oldConfig ) {
|
|
|
|
if( config.showNotes ) {
|
|
this.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Pick up notes from the current slide and display them
|
|
* to the viewer.
|
|
*
|
|
* @see {@link config.showNotes}
|
|
*/
|
|
update() {
|
|
|
|
if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) {
|
|
|
|
this.element.innerHTML = this.getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Updates the visibility of the speaker notes sidebar that
|
|
* is used to share annotated slides. The notes sidebar is
|
|
* only visible if showNotes is true and there are notes on
|
|
* one or more slides in the deck.
|
|
*/
|
|
updateVisibility() {
|
|
|
|
if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {
|
|
this.Reveal.getRevealElement().classList.add( 'show-notes' );
|
|
}
|
|
else {
|
|
this.Reveal.getRevealElement().classList.remove( 'show-notes' );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Checks if there are speaker notes for ANY slide in the
|
|
* presentation.
|
|
*/
|
|
hasNotes() {
|
|
|
|
return this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;
|
|
|
|
}
|
|
|
|
/**
|
|
* Checks if this presentation is running inside of the
|
|
* speaker notes window.
|
|
*
|
|
* @return {boolean}
|
|
*/
|
|
isSpeakerNotesWindow() {
|
|
|
|
return !!window.location.search.match( /receiver/gi );
|
|
|
|
}
|
|
|
|
/**
|
|
* Retrieves the speaker notes from a slide. Notes can be
|
|
* defined in two ways:
|
|
* 1. As a data-notes attribute on the slide <section>
|
|
* 2. As an <aside class="notes"> inside of the slide
|
|
*
|
|
* @param {HTMLElement} [slide=currentSlide]
|
|
* @return {(string|null)}
|
|
*/
|
|
getSlideNotes( slide = this.Reveal.getCurrentSlide() ) {
|
|
|
|
// Notes can be specified via the data-notes attribute...
|
|
if( slide.hasAttribute( 'data-notes' ) ) {
|
|
return slide.getAttribute( 'data-notes' );
|
|
}
|
|
|
|
// ... or using an <aside class="notes"> element
|
|
let notesElement = slide.querySelector( 'aside.notes' );
|
|
if( notesElement ) {
|
|
return notesElement.innerHTML;
|
|
}
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
} |