Prvi commit

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/index.js

@@ -0,0 +1,29 @@
+import Worker from './worker.js';
+import './plugin/jspdf-plugin.js';
+import './plugin/pagebreaks.js';
+import './plugin/hyperlinks.js';
+
+/**
+ * Generate a PDF from an HTML element or string using html2canvas and jsPDF.
+ *
+ * @param {Element|string} source The source element or HTML string.
+ * @param {Object=} opt An object of optional settings: 'margin', 'filename',
+ *    'image' ('type' and 'quality'), and 'html2canvas' / 'jspdf', which are
+ *    sent as settings to their corresponding functions.
+ */
+var html2pdf = function html2pdf(src, opt) {
+  // Create a new worker with the given options.
+  var worker = new html2pdf.Worker(opt);
+
+  if (src) {
+    // If src is specified, perform the traditional 'simple' operation.
+    return worker.from(src).save();
+  } else {
+    // Otherwise, return the worker for new Promise-based operation.
+    return worker;
+  }
+}
+html2pdf.Worker = Worker;
+
+// Expose the html2pdf function.
+export default html2pdf;

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/plugin/hyperlinks.js

@@ -0,0 +1,59 @@
+import Worker from '../worker.js';
+import { unitConvert } from '../utils.js';
+
+// Add hyperlink functionality to the PDF creation.
+
+// Main link array, and refs to original functions.
+var linkInfo = [];
+var orig = {
+  toContainer: Worker.prototype.toContainer,
+  toPdf: Worker.prototype.toPdf,
+};
+
+Worker.prototype.toContainer = function toContainer() {
+  return orig.toContainer.call(this).then(function toContainer_hyperlink() {
+    // Retrieve hyperlink info if the option is enabled.
+    if (this.opt.enableLinks) {
+      // Find all anchor tags and get the container's bounds for reference.
+      var container = this.prop.container;
+      var links = container.querySelectorAll('a');
+      var containerRect = unitConvert(container.getBoundingClientRect(), this.prop.pageSize.k);
+      linkInfo = [];
+
+      // Loop through each anchor tag.
+      Array.prototype.forEach.call(links, function(link) {
+        // Treat each client rect as a separate link (for text-wrapping).
+        var clientRects = link.getClientRects();
+        for (var i=0; i<clientRects.length; i++) {
+          var clientRect = unitConvert(clientRects[i], this.prop.pageSize.k);
+          clientRect.left -= containerRect.left;
+          clientRect.top -= containerRect.top;
+
+          var page = Math.floor(clientRect.top / this.prop.pageSize.inner.height) + 1;
+          var top = this.opt.margin[0] + clientRect.top % this.prop.pageSize.inner.height;
+          var left = this.opt.margin[1] + clientRect.left;
+
+          linkInfo.push({ page, top, left, clientRect, link });
+        }
+      }, this);
+    }
+  });
+};
+
+Worker.prototype.toPdf = function toPdf() {
+  return orig.toPdf.call(this).then(function toPdf_hyperlink() {
+    // Add hyperlinks if the option is enabled.
+    if (this.opt.enableLinks) {
+      // Attach each anchor tag based on info from toContainer().
+      linkInfo.forEach(function(l) {
+        this.prop.pdf.setPage(l.page);
+        this.prop.pdf.link(l.left, l.top, l.clientRect.width, l.clientRect.height,
+                           { url: l.link.href });
+      }, this);
+
+      // Reset the active page of the PDF to the final page.
+      var nPages = this.prop.pdf.internal.getNumberOfPages();
+      this.prop.pdf.setPage(nPages);
+    }
+  });
+};

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/plugin/jspdf-plugin.js

@@ -0,0 +1,99 @@
+// Import dependencies.
+import { jsPDF } from 'jspdf';
+
+// Get dimensions of a PDF page, as determined by jsPDF.
+jsPDF.getPageSize = function(orientation, unit, format) {
+  // Decode options object
+  if (typeof orientation === 'object') {
+    var options = orientation;
+    orientation = options.orientation;
+    unit = options.unit || unit;
+    format = options.format || format;
+  }
+
+  // Default options
+  unit        = unit || 'mm';
+  format      = format || 'a4';
+  orientation = ('' + (orientation || 'P')).toLowerCase();
+  var format_as_string = ('' + format).toLowerCase();
+
+  // Size in pt of various paper formats
+  var pageFormats = {
+    'a0'  : [2383.94, 3370.39], 'a1'  : [1683.78, 2383.94],
+    'a2'  : [1190.55, 1683.78], 'a3'  : [ 841.89, 1190.55],
+    'a4'  : [ 595.28,  841.89], 'a5'  : [ 419.53,  595.28],
+    'a6'  : [ 297.64,  419.53], 'a7'  : [ 209.76,  297.64],
+    'a8'  : [ 147.40,  209.76], 'a9'  : [ 104.88,  147.40],
+    'a10' : [  73.70,  104.88], 'b0'  : [2834.65, 4008.19],
+    'b1'  : [2004.09, 2834.65], 'b2'  : [1417.32, 2004.09],
+    'b3'  : [1000.63, 1417.32], 'b4'  : [ 708.66, 1000.63],
+    'b5'  : [ 498.90,  708.66], 'b6'  : [ 354.33,  498.90],
+    'b7'  : [ 249.45,  354.33], 'b8'  : [ 175.75,  249.45],
+    'b9'  : [ 124.72,  175.75], 'b10' : [  87.87,  124.72],
+    'c0'  : [2599.37, 3676.54], 'c1'  : [1836.85, 2599.37],
+    'c2'  : [1298.27, 1836.85], 'c3'  : [ 918.43, 1298.27],
+    'c4'  : [ 649.13,  918.43], 'c5'  : [ 459.21,  649.13],
+    'c6'  : [ 323.15,  459.21], 'c7'  : [ 229.61,  323.15],
+    'c8'  : [ 161.57,  229.61], 'c9'  : [ 113.39,  161.57],
+    'c10' : [  79.37,  113.39], 'dl'  : [ 311.81,  623.62],
+    'letter'            : [612,   792],
+    'government-letter' : [576,   756],
+    'legal'             : [612,  1008],
+    'junior-legal'      : [576,   360],
+    'ledger'            : [1224,  792],
+    'tabloid'           : [792,  1224],
+    'credit-card'       : [153,   243]
+  };
+
+  // Unit conversion
+  switch (unit) {
+    case 'pt':  var k = 1;          break;
+    case 'mm':  var k = 72 / 25.4;  break;
+    case 'cm':  var k = 72 / 2.54;  break;
+    case 'in':  var k = 72;         break;
+    case 'px':  var k = 72 / 96;    break;
+    case 'pc':  var k = 12;         break;
+    case 'em':  var k = 12;         break;
+    case 'ex':  var k = 6;          break;
+    default:
+      throw ('Invalid unit: ' + unit);
+  }
+
+  // Dimensions are stored as user units and converted to points on output
+  if (pageFormats.hasOwnProperty(format_as_string)) {
+    var pageHeight = pageFormats[format_as_string][1] / k;
+    var pageWidth = pageFormats[format_as_string][0] / k;
+  } else {
+    try {
+      var pageHeight = format[1];
+      var pageWidth = format[0];
+    } catch (err) {
+      throw new Error('Invalid format: ' + format);
+    }
+  }
+
+  // Handle page orientation
+  if (orientation === 'p' || orientation === 'portrait') {
+    orientation = 'p';
+    if (pageWidth > pageHeight) {
+      var tmp = pageWidth;
+      pageWidth = pageHeight;
+      pageHeight = tmp;
+    }
+  } else if (orientation === 'l' || orientation === 'landscape') {
+    orientation = 'l';
+    if (pageHeight > pageWidth) {
+      var tmp = pageWidth;
+      pageWidth = pageHeight;
+      pageHeight = tmp;
+    }
+  } else {
+    throw('Invalid orientation: ' + orientation);
+  }
+
+  // Return information (k is the unit conversion ratio from pts)
+  var info = { 'width': pageWidth, 'height': pageHeight, 'unit': unit, 'k': k };
+  return info;
+};
+
+export default jsPDF;

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/plugin/pagebreaks.js

@@ -0,0 +1,134 @@
+import Worker from '../worker.js';
+import { objType, createElement } from '../utils.js';
+
+/* Pagebreak plugin:
+
+    Adds page-break functionality to the html2pdf library. Page-breaks can be
+    enabled by CSS styles, set on individual elements using selectors, or
+    avoided from breaking inside all elements.
+
+    Options on the `opt.pagebreak` object:
+
+    mode:   String or array of strings: 'avoid-all', 'css', and/or 'legacy'
+            Default: ['css', 'legacy']
+
+    before: String or array of CSS selectors for which to add page-breaks
+            before each element. Can be a specific element with an ID
+            ('#myID'), all elements of a type (e.g. 'img'), all of a class
+            ('.myClass'), or even '*' to match every element.
+
+    after:  Like 'before', but adds a page-break immediately after the element.
+
+    avoid:  Like 'before', but avoids page-breaks on these elements. You can
+            enable this feature on every element using the 'avoid-all' mode.
+*/
+
+// Refs to original functions.
+var orig = {
+  toContainer: Worker.prototype.toContainer
+};
+
+// Add pagebreak default options to the Worker template.
+Worker.template.opt.pagebreak = {
+  mode: ['css', 'legacy'],
+  before: [],
+  after: [],
+  avoid: []
+};
+
+Worker.prototype.toContainer = function toContainer() {
+  return orig.toContainer.call(this).then(function toContainer_pagebreak() {
+    // Setup root element and inner page height.
+    var root = this.prop.container;
+    var pxPageHeight = this.prop.pageSize.inner.px.height;
+
+    // Check all requested modes.
+    var modeSrc = [].concat(this.opt.pagebreak.mode);
+    var mode = {
+      avoidAll:   modeSrc.indexOf('avoid-all') !== -1,
+      css:        modeSrc.indexOf('css') !== -1,
+      legacy:     modeSrc.indexOf('legacy') !== -1
+    };
+
+    // Get arrays of all explicitly requested elements.
+    var select = {};
+    var self = this;
+    ['before', 'after', 'avoid'].forEach(function(key) {
+      var all = mode.avoidAll && key === 'avoid';
+      select[key] = all ? [] : [].concat(self.opt.pagebreak[key] || []);
+      if (select[key].length > 0) {
+        select[key] = Array.prototype.slice.call(
+          root.querySelectorAll(select[key].join(', ')));
+      }
+    });
+
+    // Get all legacy page-break elements.
+    var legacyEls = root.querySelectorAll('.html2pdf__page-break');
+    legacyEls = Array.prototype.slice.call(legacyEls);
+
+    // Loop through all elements.
+    var els = root.querySelectorAll('*');
+    Array.prototype.forEach.call(els, function pagebreak_loop(el) {
+      // Setup pagebreak rules based on legacy and avoidAll modes.
+      var rules = {
+        before: false,
+        after:  mode.legacy && legacyEls.indexOf(el) !== -1,
+        avoid:  mode.avoidAll
+      };
+
+      // Add rules for css mode.
+      if (mode.css) {
+        // TODO: Check if this is valid with iFrames.
+        var style = window.getComputedStyle(el);
+        // TODO: Handle 'left' and 'right' correctly.
+        // TODO: Add support for 'avoid' on breakBefore/After.
+        var breakOpt = ['always', 'page', 'left', 'right'];
+        var avoidOpt = ['avoid', 'avoid-page'];
+        rules = {
+          before: rules.before || breakOpt.indexOf(style.breakBefore || style.pageBreakBefore) !== -1,
+          after:  rules.after || breakOpt.indexOf(style.breakAfter || style.pageBreakAfter) !== -1,
+          avoid:  rules.avoid || avoidOpt.indexOf(style.breakInside || style.pageBreakInside) !== -1
+        };
+      }
+
+      // Add rules for explicit requests.
+      Object.keys(rules).forEach(function(key) {
+        rules[key] = rules[key] || select[key].indexOf(el) !== -1;
+      });
+
+      // Get element position on the screen.
+      // TODO: Subtract the top of the container from clientRect.top/bottom?
+      var clientRect = el.getBoundingClientRect();
+
+      // Avoid: Check if a break happens mid-element.
+      if (rules.avoid && !rules.before) {
+        var startPage = Math.floor(clientRect.top / pxPageHeight);
+        var endPage = Math.floor(clientRect.bottom / pxPageHeight);
+        var nPages = Math.abs(clientRect.bottom - clientRect.top) / pxPageHeight;
+
+        // Turn on rules.before if the el is broken and is at most one page long.
+        if (endPage !== startPage && nPages <= 1) {
+          rules.before = true;
+        }
+      }
+
+      // Before: Create a padding div to push the element to the next page.
+      if (rules.before) {
+        var pad = createElement('div', {style: {
+          display: 'block',
+          height: pxPageHeight - (clientRect.top % pxPageHeight) + 'px'
+        }});
+        el.parentNode.insertBefore(pad, el);
+      }
+
+      // After: Create a padding div to fill the remaining page.
+      if (rules.after) {
+        var pad = createElement('div', {style: {
+          display: 'block',
+          height: pxPageHeight - (clientRect.bottom % pxPageHeight) + 'px'
+        }});
+        el.parentNode.insertBefore(pad, el.nextSibling);
+      }
+    });
+  });
+};

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/utils.js

@@ -0,0 +1,78 @@
+// Determine the type of a variable/object.
+export const objType = function objType(obj) {
+  var type = typeof obj;
+  if (type === 'undefined')                                 return 'undefined';
+  else if (type === 'string' || obj instanceof String)      return 'string';
+  else if (type === 'number' || obj instanceof Number)      return 'number';
+  else if (type === 'function' || obj instanceof Function)  return 'function';
+  else if (!!obj && obj.constructor === Array)              return 'array';
+  else if (obj && obj.nodeType === 1)                       return 'element';
+  else if (type === 'object')                               return 'object';
+  else                                                      return 'unknown';
+};
+
+// Create an HTML element with optional className, innerHTML, and style.
+export const createElement = function createElement(tagName, opt) {
+  var el = document.createElement(tagName);
+  if (opt.className)  el.className = opt.className;
+  if (opt.innerHTML) {
+    el.innerHTML = opt.innerHTML;
+    var scripts = el.getElementsByTagName('script');
+    for (var i = scripts.length; i-- > 0; null) {
+      scripts[i].parentNode.removeChild(scripts[i]);
+    }
+  }
+  for (var key in opt.style) {
+    el.style[key] = opt.style[key];
+  }
+  return el;
+};
+
+// Deep-clone a node and preserve contents/properties.
+export const cloneNode = function cloneNode(node, javascriptEnabled) {
+  // Recursively clone the node.
+  var clone = node.nodeType === 3 ? document.createTextNode(node.nodeValue) : node.cloneNode(false);
+  for (var child = node.firstChild; child; child = child.nextSibling) {
+    if (javascriptEnabled === true || child.nodeType !== 1 || child.nodeName !== 'SCRIPT') {
+      clone.appendChild(cloneNode(child, javascriptEnabled));
+    }
+  }
+
+  if (node.nodeType === 1) {
+    // Preserve contents/properties of special nodes.
+    if (node.nodeName === 'CANVAS') {
+      clone.width = node.width;
+      clone.height = node.height;
+      clone.getContext('2d').drawImage(node, 0, 0);
+    } else if (node.nodeName === 'TEXTAREA' || node.nodeName === 'SELECT') {
+      clone.value = node.value;
+    }
+
+    // Preserve the node's scroll position when it loads.
+    clone.addEventListener('load', function() {
+      clone.scrollTop = node.scrollTop;
+      clone.scrollLeft = node.scrollLeft;
+    }, true);
+  }
+
+  // Return the cloned node.
+  return clone;
+}
+
+// Convert units from px using the conversion value 'k' from jsPDF.
+export const unitConvert = function unitConvert(obj, k) {
+  if (objType(obj) === 'number') {
+    return obj * 72 / 96 / k;
+  } else {
+    var newObj = {};
+    for (var key in obj) {
+      newObj[key] = obj[key] * 72 / 96 / k;
+    }
+    return newObj;
+  }
+};
+
+// Convert units to px using the conversion value 'k' from jsPDF.
+export const toPx = function toPx(val, k) {
+  return Math.floor(val * k / 72 * 96);
+}

EveryThing/wwwroot/vendor/libs/html2pdf.js/src/worker.js

@@ -0,0 +1,481 @@
+import { jsPDF } from 'jspdf';
+import * as html2canvas from 'html2canvas';
+import { objType, createElement, cloneNode, toPx } from './utils.js';
+import es6promise from 'es6-promise';
+var Promise = es6promise.Promise;
+
+/* ----- CONSTRUCTOR ----- */
+
+var Worker = function Worker(opt) {
+  // Create the root parent for the proto chain, and the starting Worker.
+  var root = Object.assign(Worker.convert(Promise.resolve()),
+                           JSON.parse(JSON.stringify(Worker.template)));
+  var self = Worker.convert(Promise.resolve(), root);
+
+  // Set progress, optional settings, and return.
+  self = self.setProgress(1, Worker, 1, [Worker]);
+  self = self.set(opt);
+  return self;
+};
+
+// Boilerplate for subclassing Promise.
+Worker.prototype = Object.create(Promise.prototype);
+Worker.prototype.constructor = Worker;
+
+// Converts/casts promises into Workers.
+Worker.convert = function convert(promise, inherit) {
+  // Uses prototypal inheritance to receive changes made to ancestors' properties.
+  promise.__proto__ = inherit || Worker.prototype;
+  return promise;
+};
+
+Worker.template = {
+  prop: {
+    src: null,
+    container: null,
+    overlay: null,
+    canvas: null,
+    img: null,
+    pdf: null,
+    pageSize: null
+  },
+  progress: {
+    val: 0,
+    state: null,
+    n: 0,
+    stack: []
+  },
+  opt: {
+    filename: 'file.pdf',
+    margin: [0,0,0,0],
+    image: { type: 'jpeg', quality: 0.95 },
+    enableLinks: true,
+    html2canvas: {},
+    jsPDF: {}
+  }
+};
+
+/* ----- FROM / TO ----- */
+
+Worker.prototype.from = function from(src, type) {
+  function getType(src) {
+    switch (objType(src)) {
+      case 'string':  return 'string';
+      case 'element': return src.nodeName.toLowerCase === 'canvas' ? 'canvas' : 'element';
+      default:        return 'unknown';
+    }
+  }
+
+  return this.then(function from_main() {
+    type = type || getType(src);
+    switch (type) {
+      case 'string':  return this.set({ src: createElement('div', {innerHTML: src}) });
+      case 'element': return this.set({ src: src });
+      case 'canvas':  return this.set({ canvas: src });
+      case 'img':     return this.set({ img: src });
+      default:        return this.error('Unknown source type.');
+    }
+  });
+};
+
+Worker.prototype.to = function to(target) {
+  // Route the 'to' request to the appropriate method.
+  switch (target) {
+    case 'container':
+      return this.toContainer();
+    case 'canvas':
+      return this.toCanvas();
+    case 'img':
+      return this.toImg();
+    case 'pdf':
+      return this.toPdf();
+    default:
+      return this.error('Invalid target.');
+  }
+};
+
+Worker.prototype.toContainer = function toContainer() {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkSrc() { return this.prop.src || this.error('Cannot duplicate - no source HTML.'); },
+    function checkPageSize() { return this.prop.pageSize || this.setPageSize(); }
+  ];
+
+  return this.thenList(prereqs).then(function toContainer_main() {
+    // Define the CSS styles for the container and its overlay parent.
+    var overlayCSS = {
+      position: 'fixed', overflow: 'hidden', zIndex: 1000,
+      left: 0, right: 0, bottom: 0, top: 0,
+      backgroundColor: 'rgba(0,0,0,0.8)'
+    };
+    var containerCSS = {
+      position: 'absolute', width: this.prop.pageSize.inner.width + this.prop.pageSize.unit,
+      left: 0, right: 0, top: 0, height: 'auto', margin: 'auto',
+      backgroundColor: 'white'
+    };
+
+    // Set the overlay to hidden (could be changed in the future to provide a print preview).
+    overlayCSS.opacity = 0;
+
+    // Create and attach the elements.
+    var source = cloneNode(this.prop.src, this.opt.html2canvas.javascriptEnabled);
+    this.prop.overlay = createElement('div',   { className: 'html2pdf__overlay', style: overlayCSS });
+    this.prop.container = createElement('div', { className: 'html2pdf__container', style: containerCSS });
+    this.prop.container.appendChild(source);
+    this.prop.overlay.appendChild(this.prop.container);
+    document.body.appendChild(this.prop.overlay);
+  });
+};
+
+Worker.prototype.toCanvas = function toCanvas() {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkContainer() { return document.body.contains(this.prop.container)
+                               || this.toContainer(); }
+  ];
+
+  // Fulfill prereqs then create the canvas.
+  return this.thenList(prereqs).then(function toCanvas_main() {
+    // Handle old-fashioned 'onrendered' argument.
+    var options = Object.assign({}, this.opt.html2canvas);
+    delete options.onrendered;
+
+    return html2canvas(this.prop.container, options);
+  }).then(function toCanvas_post(canvas) {
+    // Handle old-fashioned 'onrendered' argument.
+    var onRendered = this.opt.html2canvas.onrendered || function () {};
+    onRendered(canvas);
+
+    this.prop.canvas = canvas;
+    document.body.removeChild(this.prop.overlay);
+  });
+};
+
+Worker.prototype.toImg = function toImg() {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkCanvas() { return this.prop.canvas || this.toCanvas(); }
+  ];
+
+  // Fulfill prereqs then create the image.
+  return this.thenList(prereqs).then(function toImg_main() {
+    var imgData = this.prop.canvas.toDataURL('image/' + this.opt.image.type, this.opt.image.quality);
+    this.prop.img = document.createElement('img');
+    this.prop.img.src = imgData;
+  });
+};
+
+Worker.prototype.toPdf = function toPdf() {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkCanvas() { return this.prop.canvas || this.toCanvas(); }
+  ];
+
+  // Fulfill prereqs then create the image.
+  return this.thenList(prereqs).then(function toPdf_main() {
+    // Create local copies of frequently used properties.
+    var canvas = this.prop.canvas;
+    var opt = this.opt;
+
+    // Calculate the number of pages.
+    var pxFullHeight = canvas.height;
+    var pxPageHeight = Math.floor(canvas.width * this.prop.pageSize.inner.ratio);
+    var nPages = Math.ceil(pxFullHeight / pxPageHeight);
+
+    // Define pageHeight separately so it can be trimmed on the final page.
+    var pageHeight = this.prop.pageSize.inner.height;
+
+    // Create a one-page canvas to split up the full image.
+    var pageCanvas = document.createElement('canvas');
+    var pageCtx = pageCanvas.getContext('2d');
+    pageCanvas.width = canvas.width;
+    pageCanvas.height = pxPageHeight;
+
+    // Initialize the PDF.
+    this.prop.pdf = this.prop.pdf || new jsPDF(opt.jsPDF);
+
+    for (var page=0; page<nPages; page++) {
+      // Trim the final page to reduce file size.
+      if (page === nPages-1 && pxFullHeight % pxPageHeight !== 0) {
+        pageCanvas.height = pxFullHeight % pxPageHeight;
+        pageHeight = pageCanvas.height * this.prop.pageSize.inner.width / pageCanvas.width;
+      }
+
+      // Display the page.
+      var w = pageCanvas.width;
+      var h = pageCanvas.height;
+      pageCtx.fillStyle = 'white';
+      pageCtx.fillRect(0, 0, w, h);
+      pageCtx.drawImage(canvas, 0, page*pxPageHeight, w, h, 0, 0, w, h);
+
+      // Add the page to the PDF.
+      if (page)  this.prop.pdf.addPage();
+      var imgData = pageCanvas.toDataURL('image/' + opt.image.type, opt.image.quality);
+      this.prop.pdf.addImage(imgData, opt.image.type, opt.margin[1], opt.margin[0],
+                        this.prop.pageSize.inner.width, pageHeight);
+    }
+  });
+};
+
+
+/* ----- OUTPUT / SAVE ----- */
+
+Worker.prototype.output = function output(type, options, src) {
+  // Redirect requests to the correct function (outputPdf / outputImg).
+  src = src || 'pdf';
+  if (src.toLowerCase() === 'img' || src.toLowerCase() === 'image') {
+    return this.outputImg(type, options);
+  } else {
+    return this.outputPdf(type, options);
+  }
+};
+
+Worker.prototype.outputPdf = function outputPdf(type, options) {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkPdf() { return this.prop.pdf || this.toPdf(); }
+  ];
+
+  // Fulfill prereqs then perform the appropriate output.
+  return this.thenList(prereqs).then(function outputPdf_main() {
+    /* Currently implemented output types:
+     *    https://rawgit.com/MrRio/jsPDF/master/docs/jspdf.js.html#line992
+     *  save(options), arraybuffer, blob, bloburi/bloburl,
+     *  datauristring/dataurlstring, dataurlnewwindow, datauri/dataurl
+     */
+    return this.prop.pdf.output(type, options);
+  });
+};
+
+Worker.prototype.outputImg = function outputImg(type, options) {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkImg() { return this.prop.img || this.toImg(); }
+  ];
+
+  // Fulfill prereqs then perform the appropriate output.
+  return this.thenList(prereqs).then(function outputImg_main() {
+    switch (type) {
+      case undefined:
+      case 'img':
+        return this.prop.img;
+      case 'datauristring':
+      case 'dataurlstring':
+        return this.prop.img.src;
+      case 'datauri':
+      case 'dataurl':
+        return document.location.href = this.prop.img.src;
+      default:
+        throw 'Image output type "' + type + '" is not supported.';
+    }
+  });
+};
+
+Worker.prototype.save = function save(filename) {
+  // Set up function prerequisites.
+  var prereqs = [
+    function checkPdf() { return this.prop.pdf || this.toPdf(); }
+  ];
+
+  // Fulfill prereqs, update the filename (if provided), and save the PDF.
+  return this.thenList(prereqs).set(
+    filename ? { filename: filename } : null
+  ).then(function save_main() {
+    this.prop.pdf.save(this.opt.filename);
+  });
+};
+
+/* ----- SET / GET ----- */
+
+Worker.prototype.set = function set(opt) {
+  // TODO: Implement ordered pairs?
+
+  // Silently ignore invalid or empty input.
+  if (objType(opt) !== 'object') {
+    return this;
+  }
+
+  // Build an array of setter functions to queue.
+  var fns = Object.keys(opt || {}).map(function (key) {
+    switch (key) {
+      case 'margin':
+        return this.setMargin.bind(this, opt.margin);
+      case 'jsPDF':
+        return function set_jsPDF() { this.opt.jsPDF = opt.jsPDF; return this.setPageSize(); }
+      case 'pageSize':
+        return this.setPageSize.bind(this, opt.pageSize);
+      default:
+        if (key in Worker.template.prop) {
+          // Set pre-defined properties in prop.
+          return function set_prop() { this.prop[key] = opt[key]; }
+        } else {
+          // Set any other properties in opt.
+          return function set_opt() { this.opt[key] = opt[key] };
+        }
+    }
+  }, this);
+
+  // Set properties within the promise chain.
+  return this.then(function set_main() {
+    return this.thenList(fns);
+  });
+};
+
+Worker.prototype.get = function get(key, cbk) {
+  return this.then(function get_main() {
+    // Fetch the requested property, either as a predefined prop or in opt.
+    var val = (key in Worker.template.prop) ? this.prop[key] : this.opt[key];
+    return cbk ? cbk(val) : val;
+  });
+};
+
+Worker.prototype.setMargin = function setMargin(margin) {
+  return this.then(function setMargin_main() {
+    // Parse the margin property: [top, left, bottom, right].
+    switch (objType(margin)) {
+      case 'number':
+        margin = [margin, margin, margin, margin];
+      case 'array':
+        if (margin.length === 2) {
+          margin = [margin[0], margin[1], margin[0], margin[1]];
+        }
+        if (margin.length === 4) {
+          break;
+        }
+      default:
+        return this.error('Invalid margin array.');
+    }
+
+    // Set the margin property, then update pageSize.
+    this.opt.margin = margin;
+  }).then(this.setPageSize);
+}
+
+Worker.prototype.setPageSize = function setPageSize(pageSize) {
+  return this.then(function setPageSize_main() {
+    // Retrieve page-size based on jsPDF settings, if not explicitly provided.
+    pageSize = pageSize || jsPDF.getPageSize(this.opt.jsPDF);
+
+    // Add 'inner' field if not present.
+    if (!pageSize.hasOwnProperty('inner')) {
+      pageSize.inner = {
+        width:  pageSize.width - this.opt.margin[1] - this.opt.margin[3],
+        height: pageSize.height - this.opt.margin[0] - this.opt.margin[2]
+      };
+      pageSize.inner.px = {
+        width:  toPx(pageSize.inner.width, pageSize.k),
+        height: toPx(pageSize.inner.height, pageSize.k)
+      };
+      pageSize.inner.ratio = pageSize.inner.height / pageSize.inner.width;
+    }
+
+    // Attach pageSize to this.
+    this.prop.pageSize = pageSize;
+  });
+}
+
+Worker.prototype.setProgress = function setProgress(val, state, n, stack) {
+  // Immediately update all progress values.
+  if (val != null)    this.progress.val = val;
+  if (state != null)  this.progress.state = state;
+  if (n != null)      this.progress.n = n;
+  if (stack != null)  this.progress.stack = stack;
+  this.progress.ratio = this.progress.val / this.progress.state;
+
+  // Return this for command chaining.
+  return this;
+};
+
+Worker.prototype.updateProgress = function updateProgress(val, state, n, stack) {
+  // Immediately update all progress values, using setProgress.
+  return this.setProgress(
+    val ? this.progress.val + val : null,
+    state ? state : null,
+    n ? this.progress.n + n : null,
+    stack ? this.progress.stack.concat(stack) : null
+  );
+};
+
+/* ----- PROMISE MAPPING ----- */
+
+Worker.prototype.then = function then(onFulfilled, onRejected) {
+  // Wrap `this` for encapsulation.
+  var self = this;
+
+  return this.thenCore(onFulfilled, onRejected, function then_main(onFulfilled, onRejected) {
+    // Update progress while queuing, calling, and resolving `then`.
+    self.updateProgress(null, null, 1, [onFulfilled]);
+    return Promise.prototype.then.call(this, function then_pre(val) {
+      self.updateProgress(null, onFulfilled);
+      return val;
+    }).then(onFulfilled, onRejected).then(function then_post(val) {
+      self.updateProgress(1);
+      return val;
+    });
+  });
+};
+
+Worker.prototype.thenCore = function thenCore(onFulfilled, onRejected, thenBase) {
+  // Handle optional thenBase parameter.
+  thenBase = thenBase || Promise.prototype.then;
+
+  // Wrap `this` for encapsulation and bind it to the promise handlers.
+  var self = this;
+  if (onFulfilled)  { onFulfilled = onFulfilled.bind(self); }
+  if (onRejected)   { onRejected = onRejected.bind(self); }
+
+  // Cast self into a Promise to avoid polyfills recursively defining `then`.
+  var isNative = Promise.toString().indexOf('[native code]') !== -1 && Promise.name === 'Promise';
+  var selfPromise = isNative ? self : Worker.convert(Object.assign({}, self), Promise.prototype);
+
+  // Return the promise, after casting it into a Worker and preserving props.
+  var returnVal = thenBase.call(selfPromise, onFulfilled, onRejected);
+  return Worker.convert(returnVal, self.__proto__);
+};
+
+Worker.prototype.thenExternal = function thenExternal(onFulfilled, onRejected) {
+  // Call `then` and return a standard promise (exits the Worker chain).
+  return Promise.prototype.then.call(this, onFulfilled, onRejected);
+};
+
+Worker.prototype.thenList = function thenList(fns) {
+  // Queue a series of promise 'factories' into the promise chain.
+  var self = this;
+  fns.forEach(function thenList_forEach(fn) {
+    self = self.thenCore(fn);
+  });
+  return self;
+};
+
+Worker.prototype['catch'] = function (onRejected) {
+  // Bind `this` to the promise handler, call `catch`, and return a Worker.
+  if (onRejected)   { onRejected = onRejected.bind(this); }
+  var returnVal = Promise.prototype['catch'].call(this, onRejected);
+  return Worker.convert(returnVal, this);
+};
+
+Worker.prototype.catchExternal = function catchExternal(onRejected) {
+  // Call `catch` and return a standard promise (exits the Worker chain).
+  return Promise.prototype['catch'].call(this, onRejected);
+};
+
+Worker.prototype.error = function error(msg) {
+  // Throw the error in the Promise chain.
+  return this.then(function error_main() {
+    throw new Error(msg);
+  });
+};
+
+
+/* ----- ALIASES ----- */
+
+Worker.prototype.using = Worker.prototype.set;
+Worker.prototype.saveAs = Worker.prototype.save;
+Worker.prototype.export = Worker.prototype.output;
+Worker.prototype.run = Worker.prototype.then;
+
+
+/* ----- FINISHING ----- */
+
+// Expose the Worker class.
+export default Worker;