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tubestats-presentation
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add webpack, move playback to own module

This commit is contained in:
Hakim El Hattab 2020-03-06 18:59:09 +01:00
parent 32bbe63ea6
commit 027dc259da
7 changed files with 1615 additions and 175 deletions
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2
demo.html
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@ -406,7 +406,7 @@ Reveal.addEventListener( 'customevent', function() {
</div>
<script src="js/reveal.js"></script>
<script src="js/reveal.min.js"></script>
<script>

8
gulpfile.js
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@ -12,6 +12,7 @@ const connect = require('gulp-connect')
const autoprefixer = require('gulp-autoprefixer')
const yargs = require('yargs')
const pkg = require('./package.json')
const webpack = require('webpack-stream');
const root = yargs.argv.root || '.'
const port = yargs.argv.port || 8000
@ -24,9 +25,12 @@ const license = `/*!
* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
*/\n`
gulp.task('js', () => gulp.src(['./js/reveal.js'])
.pipe(babel({ presets: ['@babel/preset-env'] }))
.pipe(uglify())
.pipe(webpack({
mode: 'production'
}))
.pipe(header(license, {pkg: pkg}))
.pipe(rename('reveal.min.js'))
.pipe(gulp.dest('./js')))
@ -78,7 +82,7 @@ gulp.task('serve', () => {
livereload: true
})
gulp.watch(['js/reveal.js'], gulp.series('js'))
gulp.watch(['js/reveal.js', 'js/src/*.js'], gulp.series('js'))
gulp.watch([
'css/theme/source/*.{sass,scss}',

2
index.html
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@ -30,7 +30,7 @@
</div>
</div>
<script src="js/reveal.js"></script>
<script src="js/reveal.min.js"></script>
<script>
// More info about config & dependencies:

174
js/reveal.js
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@ -1,4 +1,6 @@
/*!
import Playback from './src/playback.js'
/**
* reveal.js
* http://revealjs.com
* MIT licensed
@ -6179,176 +6181,6 @@
}
// --------------------------------------------------------------------//
// ------------------------ PLAYBACK COMPONENT ------------------------//
// --------------------------------------------------------------------//
/**
* Constructor for the playback component, which displays
* play/pause/progress controls.
*
* @param {HTMLElement} container The component will append
* itself to this
* @param {function} progressCheck A method which will be
* called frequently to get the current progress on a range
* of 0-1
*/
function Playback( container, progressCheck ) {
// Cosmetics
this.diameter = 100;
this.diameter2 = this.diameter/2;
this.thickness = 6;
// Flags if we are currently playing
this.playing = false;
// Current progress on a 0-1 range
this.progress = 0;
// Used to loop the animation smoothly
this.progressOffset = 1;
this.container = container;
this.progressCheck = progressCheck;
this.canvas = document.createElement( 'canvas' );
this.canvas.className = 'playback';
this.canvas.width = this.diameter;
this.canvas.height = this.diameter;
this.canvas.style.width = this.diameter2 + 'px';
this.canvas.style.height = this.diameter2 + 'px';
this.context = this.canvas.getContext( '2d' );
this.container.appendChild( this.canvas );
this.render();
}
/**
* @param value
*/
Playback.prototype.setPlaying = function( value ) {
var wasPlaying = this.playing;
this.playing = value;
// Start repainting if we weren't already
if( !wasPlaying && this.playing ) {
this.animate();
}
else {
this.render();
}
};
Playback.prototype.animate = function() {
var progressBefore = this.progress;
this.progress = this.progressCheck();
// When we loop, offset the progress so that it eases
// smoothly rather than immediately resetting
if( progressBefore > 0.8 && this.progress < 0.2 ) {
this.progressOffset = this.progress;
}
this.render();
if( this.playing ) {
requestAnimationFrame( this.animate.bind( this ) );
}
};
/**
* Renders the current progress and playback state.
*/
Playback.prototype.render = function() {
var progress = this.playing ? this.progress : 0,
radius = ( this.diameter2 ) - this.thickness,
x = this.diameter2,
y = this.diameter2,
iconSize = 28;
// Ease towards 1
this.progressOffset += ( 1 - this.progressOffset ) * 0.1;
var endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );
var startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );
this.context.save();
this.context.clearRect( 0, 0, this.diameter, this.diameter );
// Solid background color
this.context.beginPath();
this.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );
this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';
this.context.fill();
// Draw progress track
this.context.beginPath();
this.context.arc( x, y, radius, 0, Math.PI * 2, false );
this.context.lineWidth = this.thickness;
this.context.strokeStyle = 'rgba( 255, 255, 255, 0.2 )';
this.context.stroke();
if( this.playing ) {
// Draw progress on top of track
this.context.beginPath();
this.context.arc( x, y, radius, startAngle, endAngle, false );
this.context.lineWidth = this.thickness;
this.context.strokeStyle = '#fff';
this.context.stroke();
}
this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );
// Draw play/pause icons
if( this.playing ) {
this.context.fillStyle = '#fff';
this.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );
this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
}
else {
this.context.beginPath();
this.context.translate( 4, 0 );
this.context.moveTo( 0, 0 );
this.context.lineTo( iconSize - 4, iconSize / 2 );
this.context.lineTo( 0, iconSize );
this.context.fillStyle = '#fff';
this.context.fill();
}
this.context.restore();
};
Playback.prototype.on = function( type, listener ) {
this.canvas.addEventListener( type, listener, false );
};
Playback.prototype.off = function( type, listener ) {
this.canvas.removeEventListener( type, listener, false );
};
Playback.prototype.destroy = function() {
this.playing = false;
if( this.canvas.parentNode ) {
this.container.removeChild( this.canvas );
}
};
// --------------------------------------------------------------------//
// ------------------------------- API --------------------------------//
// --------------------------------------------------------------------//

164
js/src/playback.js Normal file
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@ -0,0 +1,164 @@
/**
* Constructor for the playback component, which displays
* play/pause/progress controls.
*
* @param {HTMLElement} container The component will append
* itself to this
* @param {function} progressCheck A method which will be
* called frequently to get the current progress on a range
* of 0-1
*/
export default class Playback {
constructor( container, progressCheck ) {
// Cosmetics
this.diameter = 100;
this.diameter2 = this.diameter/2;
this.thickness = 6;
// Flags if we are currently playing
this.playing = false;
// Current progress on a 0-1 range
this.progress = 0;
// Used to loop the animation smoothly
this.progressOffset = 1;
this.container = container;
this.progressCheck = progressCheck;
this.canvas = document.createElement( 'canvas' );
this.canvas.className = 'playback';
this.canvas.width = this.diameter;
this.canvas.height = this.diameter;
this.canvas.style.width = this.diameter2 + 'px';
this.canvas.style.height = this.diameter2 + 'px';
this.context = this.canvas.getContext( '2d' );
this.container.appendChild( this.canvas );
this.render();
}
setPlaying( value ) {
const wasPlaying = this.playing;
this.playing = value;
// Start repainting if we weren't already
if( !wasPlaying && this.playing ) {
this.animate();
}
else {
this.render();
}
}
animate() {
const progressBefore = this.progress;
this.progress = this.progressCheck();
// When we loop, offset the progress so that it eases
// smoothly rather than immediately resetting
if( progressBefore > 0.8 && this.progress < 0.2 ) {
this.progressOffset = this.progress;
}
this.render();
if( this.playing ) {
requestAnimationFrame( this.animate.bind( this ) );
}
}
/**
* Renders the current progress and playback state.
*/
render() {
let progress = this.playing ? this.progress : 0,
radius = ( this.diameter2 ) - this.thickness,
x = this.diameter2,
y = this.diameter2,
iconSize = 28;
// Ease towards 1
this.progressOffset += ( 1 - this.progressOffset ) * 0.1;
const endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );
const startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );
this.context.save();
this.context.clearRect( 0, 0, this.diameter, this.diameter );
// Solid background color
this.context.beginPath();
this.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );
this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';
this.context.fill();
// Draw progress track
this.context.beginPath();
this.context.arc( x, y, radius, 0, Math.PI * 2, false );
this.context.lineWidth = this.thickness;
this.context.strokeStyle = 'rgba( 255, 255, 255, 0.2 )';
this.context.stroke();
if( this.playing ) {
// Draw progress on top of track
this.context.beginPath();
this.context.arc( x, y, radius, startAngle, endAngle, false );
this.context.lineWidth = this.thickness;
this.context.strokeStyle = '#fff';
this.context.stroke();
}
this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );
// Draw play/pause icons
if( this.playing ) {
this.context.fillStyle = '#fff';
this.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );
this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
}
else {
this.context.beginPath();
this.context.translate( 4, 0 );
this.context.moveTo( 0, 0 );
this.context.lineTo( iconSize - 4, iconSize / 2 );
this.context.lineTo( 0, iconSize );
this.context.fillStyle = '#fff';
this.context.fill();
}
this.context.restore();
}
on( type, listener ) {
this.canvas.addEventListener( type, listener, false );
}
off( type, listener ) {
this.canvas.removeEventListener( type, listener, false );
}
destroy() {
this.playing = false;
if( this.canvas.parentNode ) {
this.container.removeChild( this.canvas );
}
}
}

1439
package-lock.json generated
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1
package.json
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@ -40,6 +40,7 @@
"mustache": "^4.0.0",
"socket.io": "^2.3.0",
"yargs": "^15.1.0",
"webpack-stream": "^5.2.1",
"@babel/core": "^7.8.7",
"@babel/preset-env": "^7.8.7"
},