new controller for pdf printing
This commit is contained in:
Hakim El Hattab
parent
d918d750e0
commit
b42bb586a8
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@ -0,0 +1,195 @@
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import { SLIDES_SELECTOR } from '../utils/constants.js'
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import { toArray, createStyleSheet } from '../utils/util.js'
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/**
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* Setups up our presentation for printing/exporting to PDF.
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*/
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export default class Print {
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constructor( Reveal ) {
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this.Reveal = Reveal;
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}
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/**
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* Configures the presentation for printing to a static
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* PDF.
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*/
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setupPDF() {
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let config = this.Reveal.getConfig();
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let slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
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// Dimensions of the PDF pages
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let pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
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pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
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// Dimensions of slides within the pages
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let slideWidth = slideSize.width,
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slideHeight = slideSize.height;
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// Let the browser know what page size we want to print
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createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
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// Limit the size of certain elements to the dimensions of the slide
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createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
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document.documentElement.classList.add( 'print-pdf' );
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document.body.style.width = pageWidth + 'px';
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document.body.style.height = pageHeight + 'px';
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// Make sure stretch elements fit on slide
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this.Reveal.layoutSlideContents( slideWidth, slideHeight );
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// Compute slide numbers now, before we start duplicating slides
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let doingSlideNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
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toArray( this.Reveal.getRevealElement().querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
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slide.setAttribute( 'data-slide-number', this.Reveal.slideNumber.getSlideNumber( slide ) );
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}, this );
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// Slide and slide background layout
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toArray( this.Reveal.getRevealElement().querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
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// Vertical stacks are not centred since their section
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// children will be
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if( slide.classList.contains( 'stack' ) === false ) {
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// Center the slide inside of the page, giving the slide some margin
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let left = ( pageWidth - slideWidth ) / 2,
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top = ( pageHeight - slideHeight ) / 2;
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let contentHeight = slide.scrollHeight;
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let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
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// Adhere to configured pages per slide limit
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numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
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// Center slides vertically
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if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
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top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
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}
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// Wrap the slide in a page element and hide its overflow
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// so that no page ever flows onto another
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let page = document.createElement( 'div' );
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page.className = 'pdf-page';
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page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
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slide.parentNode.insertBefore( page, slide );
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page.appendChild( slide );
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// Position the slide inside of the page
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slide.style.left = left + 'px';
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slide.style.top = top + 'px';
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slide.style.width = slideWidth + 'px';
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if( slide.slideBackgroundElement ) {
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page.insertBefore( slide.slideBackgroundElement, slide );
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}
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// Inject notes if `showNotes` is enabled
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if( config.showNotes ) {
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// Are there notes for this slide?
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let notes = getSlideNotes( slide );
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if( notes ) {
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let notesSpacing = 8;
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let notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
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let notesElement = document.createElement( 'div' );
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notesElement.classList.add( 'speaker-notes' );
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notesElement.classList.add( 'speaker-notes-pdf' );
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notesElement.setAttribute( 'data-layout', notesLayout );
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notesElement.innerHTML = notes;
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if( notesLayout === 'separate-page' ) {
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page.parentNode.insertBefore( notesElement, page.nextSibling );
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}
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else {
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notesElement.style.left = notesSpacing + 'px';
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notesElement.style.bottom = notesSpacing + 'px';
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notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
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page.appendChild( notesElement );
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}
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}
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}
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// Inject slide numbers if `slideNumbers` are enabled
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if( doingSlideNumbers ) {
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let numberElement = document.createElement( 'div' );
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numberElement.classList.add( 'slide-number' );
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numberElement.classList.add( 'slide-number-pdf' );
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numberElement.innerHTML = slide.getAttribute( 'data-slide-number' );
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page.appendChild( numberElement );
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}
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// Copy page and show fragments one after another
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if( config.pdfSeparateFragments ) {
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// Each fragment 'group' is an array containing one or more
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// fragments. Multiple fragments that appear at the same time
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// are part of the same group.
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let fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );
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let previousFragmentStep;
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let previousPage;
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fragmentGroups.forEach( function( fragments ) {
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// Remove 'current-fragment' from the previous group
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if( previousFragmentStep ) {
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previousFragmentStep.forEach( function( fragment ) {
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fragment.classList.remove( 'current-fragment' );
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} );
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}
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// Show the fragments for the current index
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fragments.forEach( function( fragment ) {
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fragment.classList.add( 'visible', 'current-fragment' );
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}, this );
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// Create a separate page for the current fragment state
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let clonedPage = page.cloneNode( true );
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page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
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previousFragmentStep = fragments;
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previousPage = clonedPage;
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}, this );
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// Reset the first/original page so that all fragments are hidden
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fragmentGroups.forEach( function( fragments ) {
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fragments.forEach( function( fragment ) {
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fragment.classList.remove( 'visible', 'current-fragment' );
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} );
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} );
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}
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// Show all fragments
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else {
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toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
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fragment.classList.add( 'visible' );
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} );
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}
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}
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}, this );
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// Notify subscribers that the PDF layout is good to go
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this.Reveal.dispatchEvent({ type: 'pdf-ready' });
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}
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/**
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* Checks if this instance is being used to print a PDF.
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*/
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isPrintingPDF() {
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return ( /print-pdf/gi ).test( window.location.search );
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}
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}
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207
js/reveal.js
207
js/reveal.js
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@ -6,6 +6,7 @@ import Overview from './controllers/overview.js'
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import Keyboard from './controllers/keyboard.js'
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import Location from './controllers/location.js'
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import Plugins from './controllers/plugins.js'
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import Print from './controllers/print.js'
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import Touch from './controllers/touch.js'
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import Playback from './components/playback.js'
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import defaultConfig from './config.js'
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@ -24,7 +25,6 @@ import {
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deserialize,
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transformElement,
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createSingletonNode,
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createStyleSheet,
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closestParent,
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enterFullscreen,
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getQueryHash
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@ -96,6 +96,9 @@ export default function( revealElement, options ) {
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// Controller for plugin loading
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plugins = new Plugins(),
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// Handles exporting to PDF
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print = new Print( Reveal ),
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// Controls touch/swipe navigation for our deck
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touch = new Touch( Reveal ),
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@ -205,16 +208,16 @@ export default function( revealElement, options ) {
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}, 1 );
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// Special setup and config is required when printing to PDF
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if( isPrintingPDF() ) {
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if( print.isPrintingPDF() ) {
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removeEventListeners();
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// The document needs to have loaded for the PDF layout
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// measurements to be accurate
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if( document.readyState === 'complete' ) {
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setupPDF();
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print.setupPDF();
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}
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else {
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window.addEventListener( 'load', setupPDF );
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window.addEventListener( 'load', print.setupPDF );
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}
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}
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}
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/**
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* Configures the presentation for printing to a static
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* PDF.
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*/
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function setupPDF() {
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let slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
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// Dimensions of the PDF pages
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let pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
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pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
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// Dimensions of slides within the pages
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let slideWidth = slideSize.width,
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slideHeight = slideSize.height;
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// Let the browser know what page size we want to print
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createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
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// Limit the size of certain elements to the dimensions of the slide
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createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
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document.documentElement.classList.add( 'print-pdf' );
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document.body.style.width = pageWidth + 'px';
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document.body.style.height = pageHeight + 'px';
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// Make sure stretch elements fit on slide
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layoutSlideContents( slideWidth, slideHeight );
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// Compute slide numbers now, before we start duplicating slides
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let doingSlideNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
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toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
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slide.setAttribute( 'data-slide-number', slideNumber.getSlideNumber( slide ) );
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} );
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// Slide and slide background layout
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toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
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// Vertical stacks are not centred since their section
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// children will be
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if( slide.classList.contains( 'stack' ) === false ) {
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// Center the slide inside of the page, giving the slide some margin
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let left = ( pageWidth - slideWidth ) / 2,
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top = ( pageHeight - slideHeight ) / 2;
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let contentHeight = slide.scrollHeight;
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let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
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// Adhere to configured pages per slide limit
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numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
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// Center slides vertically
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if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
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top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
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}
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// Wrap the slide in a page element and hide its overflow
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// so that no page ever flows onto another
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let page = document.createElement( 'div' );
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page.className = 'pdf-page';
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page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
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slide.parentNode.insertBefore( page, slide );
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page.appendChild( slide );
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// Position the slide inside of the page
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slide.style.left = left + 'px';
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slide.style.top = top + 'px';
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slide.style.width = slideWidth + 'px';
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if( slide.slideBackgroundElement ) {
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page.insertBefore( slide.slideBackgroundElement, slide );
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}
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// Inject notes if `showNotes` is enabled
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if( config.showNotes ) {
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// Are there notes for this slide?
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let notes = getSlideNotes( slide );
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if( notes ) {
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let notesSpacing = 8;
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let notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
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let notesElement = document.createElement( 'div' );
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notesElement.classList.add( 'speaker-notes' );
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notesElement.classList.add( 'speaker-notes-pdf' );
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notesElement.setAttribute( 'data-layout', notesLayout );
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notesElement.innerHTML = notes;
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if( notesLayout === 'separate-page' ) {
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page.parentNode.insertBefore( notesElement, page.nextSibling );
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}
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else {
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notesElement.style.left = notesSpacing + 'px';
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notesElement.style.bottom = notesSpacing + 'px';
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notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
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page.appendChild( notesElement );
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}
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}
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}
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// Inject slide numbers if `slideNumbers` are enabled
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if( doingSlideNumbers ) {
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let numberElement = document.createElement( 'div' );
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numberElement.classList.add( 'slide-number' );
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numberElement.classList.add( 'slide-number-pdf' );
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numberElement.innerHTML = slide.getAttribute( 'data-slide-number' );
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page.appendChild( numberElement );
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}
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// Copy page and show fragments one after another
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if( config.pdfSeparateFragments ) {
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// Each fragment 'group' is an array containing one or more
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// fragments. Multiple fragments that appear at the same time
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// are part of the same group.
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let fragmentGroups = fragments.sort( page.querySelectorAll( '.fragment' ), true );
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let previousFragmentStep;
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let previousPage;
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fragmentGroups.forEach( function( fragments ) {
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// Remove 'current-fragment' from the previous group
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if( previousFragmentStep ) {
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previousFragmentStep.forEach( function( fragment ) {
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fragment.classList.remove( 'current-fragment' );
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} );
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}
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// Show the fragments for the current index
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fragments.forEach( function( fragment ) {
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fragment.classList.add( 'visible', 'current-fragment' );
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} );
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// Create a separate page for the current fragment state
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let clonedPage = page.cloneNode( true );
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page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
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previousFragmentStep = fragments;
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previousPage = clonedPage;
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} );
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// Reset the first/original page so that all fragments are hidden
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fragmentGroups.forEach( function( fragments ) {
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fragments.forEach( function( fragment ) {
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fragment.classList.remove( 'visible', 'current-fragment' );
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} );
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} );
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}
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// Show all fragments
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else {
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toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
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fragment.classList.add( 'visible' );
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} );
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}
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}
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} );
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// Notify subscribers that the PDF layout is good to go
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dispatchEvent({ type: 'pdf-ready' });
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}
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/**
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* This is an unfortunate necessity. Some actions – such as
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* an input field being focused in an iframe or using the
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@ -545,7 +379,7 @@ export default function( revealElement, options ) {
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*/
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function createBackgrounds() {
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let printMode = isPrintingPDF();
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let printMode = print.isPrintingPDF();
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// Clear prior backgrounds
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dom.background.innerHTML = '';
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@ -1051,15 +885,6 @@ export default function( revealElement, options ) {
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}
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/**
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* Checks if this instance is being used to print a PDF.
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*/
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function isPrintingPDF() {
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return ( /print-pdf/gi ).test( window.location.search );
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}
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/**
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* Dispatches an event of the specified type from the
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* reveal DOM element.
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@ -1259,7 +1084,7 @@ export default function( revealElement, options ) {
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*/
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function layout() {
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if( dom.wrapper && !isPrintingPDF() ) {
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if( dom.wrapper && !print.isPrintingPDF() ) {
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if( !config.disableLayout ) {
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@ -1986,7 +1811,7 @@ export default function( revealElement, options ) {
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let slides = toArray( dom.wrapper.querySelectorAll( selector ) ),
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slidesLength = slides.length;
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let printMode = isPrintingPDF();
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let printMode = print.isPrintingPDF();
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if( slidesLength ) {
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@ -2110,7 +1935,7 @@ export default function( revealElement, options ) {
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}
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// All slides need to be visible when exporting to PDF
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if( isPrintingPDF() ) {
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if( print.isPrintingPDF() ) {
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viewDistance = Number.MAX_VALUE;
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}
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@ -2185,7 +2010,7 @@ export default function( revealElement, options ) {
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*/
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function updateNotes() {
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if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) {
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if( config.showNotes && dom.speakerNotes && currentSlide && !print.isPrintingPDF() ) {
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dom.speakerNotes.innerHTML = getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
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@ -3368,11 +3193,11 @@ export default function( revealElement, options ) {
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isVerticalSlide,
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// State checks
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isOverview: overview.isActive.bind( overview ),
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isPaused,
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isAutoSliding,
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isSpeakerNotes,
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isPrintingPDF,
|
||||
isOverview: overview.isActive.bind( overview ),
|
||||
isPrintingPDF: print.isPrintingPDF.bind( print ),
|
||||
|
||||
// Slide preloading
|
||||
loadSlide: slideContent.load.bind( slideContent ),
|
||||
|
|
@ -3475,12 +3300,16 @@ export default function( revealElement, options ) {
|
|||
|
||||
location,
|
||||
overview,
|
||||
fragments,
|
||||
slideContent,
|
||||
slideNumber,
|
||||
|
||||
onUserInput,
|
||||
closeOverlay,
|
||||
updateControls,
|
||||
updateProgress,
|
||||
updateSlidesVisibility,
|
||||
layoutSlideContents,
|
||||
transformSlides,
|
||||
cueAutoSlide,
|
||||
cancelAutoSlide
|
||||
|
|
|
|||
Loading…
Reference in New Issue