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Code Issues Releases Wiki Activity

reader mode progress bar

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This commit is contained in:
Hakim El Hattab
2023-10-10 10:24:02 +02:00
parent 1871824fae
commit f80ee3b917
2 changed files with 155 additions and 27 deletions
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71
css/reveal.scss
View File

@@ -10,6 +10,8 @@
@import 'layout';
$controlsSpacing: 12px;
/*********************************************
* GLOBAL STYLES
*********************************************/
@@ -271,13 +273,11 @@ $controlsArrowAngleActive: 36deg;
}
.reveal .controls {
$spacing: 12px;
display: none;
position: absolute;
top: auto;
bottom: $spacing;
right: $spacing;
bottom: $controlsSpacing;
right: $controlsSpacing;
left: auto;
z-index: 11;
color: #000;
@@ -509,7 +509,7 @@ $controlsArrowAngleActive: 36deg;
// Edge aligned controls layout
@media screen and (min-width: 500px) {
$spacing: 0.8em;
$controlsSpacing: 0.8em;
.reveal .controls[data-controls-layout="edges"] {
& {
@@ -529,24 +529,24 @@ $controlsArrowAngleActive: 36deg;
.navigate-left {
top: 50%;
left: $spacing;
left: $controlsSpacing;
margin-top: -$controlArrowSize*0.5;
}
.navigate-right {
top: 50%;
right: $spacing;
right: $controlsSpacing;
margin-top: -$controlArrowSize*0.5;
}
.navigate-up {
top: $spacing;
top: $controlsSpacing;
left: 50%;
margin-left: -$controlArrowSize*0.5;
}
.navigate-down {
bottom: $spacing - $controlArrowSpacing + 0.3em;
bottom: $controlsSpacing - $controlArrowSpacing + 0.3em;
left: 50%;
margin-left: -$controlArrowSize*0.5;
}
@@ -2003,6 +2003,59 @@ $notesWidthPercent: 25%;
}
}
.reveal-viewport.reveal-reader::-webkit-scrollbar {
display: none;
}
.reveal-viewport.reveal-reader .reader-progress {
position: sticky;
top: 50%;
z-index: 20;
.reader-progress-inner {
position: absolute;
width: 8px;
height: 90vh;
right: $controlsSpacing;
top: 0;
transform: translateY(-50%);
border-radius: 8px;
z-index: 10;
overflow: hidden;
}
.reader-progress-playhead {
position: absolute;
width: 8px;
height: 8px;
top: 0;
left: 0;
border-radius: 8px;
background-color: rgba( 255, 255, 255, 0.7);
transition: all 0.1s ease;
z-index: 2;
}
.reader-progress-slide {
position: absolute;
width: 100%;
transition: all 0.2s ease;
background-color: rgba( 0, 0, 0, 0.4 );
border-radius: 8px;
}
.reader-progress-slide:last-child {
border-bottom-left-radius: 8px;
border-bottom-right-radius: 8px;
}
.reader-progress-slide.active {
background-color: #000;
border-radius: 8px;
}
}
/*********************************************
* PRINT STYLES

107
js/controllers/reader.js
View File

@@ -32,15 +32,14 @@ export default class Reader {
this.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;
const viewportElement = this.Reveal.getViewportElement();
const horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );
viewportElement.classList.add( 'loading-scroll-mode', 'reveal-reader' );
viewportElement.addEventListener( 'scroll', this.onScroll );
this.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-reader' );
this.viewportElement.addEventListener( 'scroll', this.onScroll );
let presentationBackground;
const viewportStyles = window.getComputedStyle( viewportElement );
const viewportStyles = window.getComputedStyle( this.viewportElement );
if( viewportStyles && viewportStyles.background ) {
presentationBackground = viewportStyles.background;
}
@@ -97,6 +96,8 @@ export default class Reader {
}, this );
this.createProgressBar();
// Remove leftover stacks
queryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );
@@ -108,13 +109,30 @@ export default class Reader {
this.Reveal.layout();
this.Reveal.setState( state );
viewportElement.classList.remove( 'loading-scroll-mode' );
this.viewportElement.classList.remove( 'loading-scroll-mode' );
this.activatedCallbacks.forEach( callback => callback() );
this.activatedCallbacks = [];
}
createProgressBar() {
this.progressBar = document.createElement( 'div' );
this.progressBar.className = 'reader-progress';
this.progressBarInner = document.createElement( 'div' );
this.progressBarInner.className = 'reader-progress-inner';
this.progressBar.appendChild( this.progressBarInner );
this.progressBarPlayhead = document.createElement( 'div' );
this.progressBarPlayhead.className = 'reader-progress-playhead';
this.progressBarInner.appendChild( this.progressBarPlayhead );
this.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );
}
/**
* Deactivates the reader mode and restores the standard slide-based
* presentation.
@@ -127,10 +145,10 @@ export default class Reader {
this.active = false;
const viewportElement = this.Reveal.getViewportElement();
this.viewportElement.removeEventListener( 'scroll', this.onScroll );
this.viewportElement.classList.remove( 'reveal-reader' );
viewportElement.removeEventListener( 'scroll', this.onScroll );
viewportElement.classList.remove( 'reveal-reader' );
this.progressBar.remove();
this.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;
this.Reveal.sync();
@@ -159,6 +177,14 @@ export default class Reader {
}
/**
* Retrieve a slide by its original h/v index (i.e. the indices the
* slide had before being linearized).
*
* @param {number} h
* @param {number} v
* @returns {HTMLElement}
*/
getSlideByIndices( h, v ) {
const page = this.pages.find( page => page.indexh === h && page.indexv === v );
@@ -179,16 +205,15 @@ export default class Reader {
const scale = this.Reveal.getScale();
const readerLayout = config.readerLayout;
const viewportElement = this.Reveal.getViewportElement();
const viewportHeight = viewportElement.offsetHeight;
const viewportHeight = this.viewportElement.offsetHeight;
const compactHeight = slideSize.height * scale;
const pageHeight = readerLayout === 'full' ? viewportHeight : compactHeight;
// The height that needs to be scrolled between scroll triggers
const scrollTriggerHeight = viewportHeight / 2;
viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );
viewportElement.style.scrollSnapType = typeof config.readerScrollSnap === 'string' ?
this.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );
this.viewportElement.style.scrollSnapType = typeof config.readerScrollSnap === 'string' ?
`y ${config.readerScrollSnap}` : '';
const pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.reader-page' ) );
@@ -270,12 +295,56 @@ export default class Reader {
return page;
} );
this.createProgressBarSlides();
}
createProgressBarSlides() {
this.progressBarInner.querySelectorAll( '.reader-progress-slide' ).forEach( slide => slide.remove() );
const spacing = 2;
const viewportHeight = this.viewportElement.offsetHeight;
const scrollHeight = this.viewportElement.scrollHeight;
this.progressBarHeight = this.progressBarInner.offsetHeight;
this.playheadHeight = viewportHeight / scrollHeight * this.progressBarHeight;
this.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;
this.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';
this.pages.forEach( page => {
page.progressBarSlide = document.createElement( 'div' );
page.progressBarSlide.className = 'reader-progress-slide';
page.progressBarSlide.style.top = page.top / scrollHeight * this.progressBarHeight + 'px';
page.progressBarSlide.style.height = page.totalHeight / scrollHeight * this.progressBarHeight - spacing + 'px';
this.progressBarInner.appendChild( page.progressBarSlide );
} );
}
layout() {
if( this.isActive() ) {
this.sync();
this.onScroll();
}
}
moveProgressBarTo( progress ) {
this.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;
this.pages.forEach( ( page ) => {
page.progressBarSlide.classList.toggle( 'active', !!page.active );
page.scrollTriggers.forEach( trigger => {
// page.progressBarSlide.classList.toggle( 'active', !!trigger.active );
} );
} );
}
@@ -292,10 +361,8 @@ export default class Reader {
onScroll() {
const viewportElement = this.Reveal.getViewportElement();
const viewportHeight = viewportElement.offsetHeight;
const scrollTop = viewportElement.scrollTop;
const viewportHeight = this.viewportElement.offsetHeight;
const scrollTop = this.viewportElement.scrollTop;
// Find the page closest to the center of the viewport, this
// is the page we want to focus and activate
@@ -367,6 +434,14 @@ export default class Reader {
}
} );
this.moveProgressBarTo( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );
}
get viewportElement() {
return this.Reveal.getViewportElement();
}
}