59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
/* global document */
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( function( document ) {
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"use strict";
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var root;
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var stepids = [];
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// Get stepids from the steps under impress root
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var getSteps = function() {
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stepids = [];
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var steps = root.querySelectorAll( ".step" );
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for ( var i = 0; i < steps.length; i++ )
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{
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stepids[ i + 1 ] = steps[ i ].id;
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}
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};
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// Wait for impress.js to be initialized
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document.addEventListener( "impress:init", function( event ) {
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root = event.target;
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getSteps();
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var gc = event.detail.api.lib.gc;
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gc.pushCallback( function() {
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stepids = [];
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if ( progressbar ) {
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progressbar.style.width = "";
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}
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if ( progress ) {
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progress.innerHTML = "";
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}
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} );
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} );
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var progressbar = document.querySelector( "div.impress-progressbar div" );
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var progress = document.querySelector( "div.impress-progress" );
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if ( null !== progressbar || null !== progress ) {
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document.addEventListener( "impress:stepleave", function( event ) {
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updateProgressbar( event.detail.next.id );
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} );
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document.addEventListener( "impress:steprefresh", function( event ) {
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getSteps();
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updateProgressbar( event.target.id );
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} );
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}
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function updateProgressbar( slideId ) {
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var slideNumber = stepids.indexOf( slideId );
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if ( null !== progressbar ) {
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var width = 100 / ( stepids.length - 1 ) * ( slideNumber );
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progressbar.style.width = width.toFixed( 2 ) + "%";
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}
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if ( null !== progress ) {
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progress.innerHTML = slideNumber + "/" + ( stepids.length - 1 );
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}
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}
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} )( document );
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