Converts HTML slides (usually via reveal) to a PDF - useful for video editing

html-slides-to-pdf.js

/*global console:true, phantom:true, slidedeck:true*/

var webpage = require('webpage'),
    page = webpage.create(),
    system = require('system'),
    url = system.args[1] || 'index.html',
    fs = require('fs'),
    imageSources = [],
    imageTags,
    width = system.args[2] || 1920,
    height = system.args[3] || 1080;

function onLoadFinished(status) {
  "use strict";
  var slideCount;

  if (status !== 'success') {
    console.log('Target file not found.');
    phantom.exit();
  }

  page.paperSize = { width: width, height: height, border: '0px' };
  page.clipRect = { top: 0, left: 0, width: width, height: height };
  page.viewportSize = { width: width, height: height };

  slideCount = page.evaluate(function(width, height) {
    var s = document.createElement('style');
    s.innerHTML = 'html, body { background: black; width: ' + width + 'px; height: ' + height + 'px; overflow: hidden; } * { -webkit-transition: all 0ms !important; } slide { width: ' + width + 'px !important; }';
    document.head.appendChild(s);

    return document.querySelectorAll('slide').length;
  }, 'width', 'height');

  fs.makeDirectory('temp-slides');

  console.log('Slide has ' + slideCount + ' slides');

  var i = 0;

  setTimeout(function () {
    var lasturl = null;
    var timer = setInterval(function () {
      i++;

      console.log(page.url);

      if (page.url === lasturl) {//i > slideCount) {
        clearInterval(timer);
        phantom.exit();
        return;
      }

      console.log('Doing ' + i);
      var src = 'temp-slides/output-' + i + '.png';
      imageSources.push(src);
      console.log('Rendering slide #' + i);
      page.render(src);
      console.log('Done slide #' + i);

      lasturl = page.url;

      page.evaluate(function() {

        // This is the bespoke method of progressing through the slides
        slidedeck.nextSlide();
      });
    }, 250);
  }, 1000);
}

page.open(url, onLoadFinished);