Create main html

Diagram-Canvas/Content/bootstrap-reboot.css

@@ -0,0 +1,325 @@
+/*!
+ * Bootstrap Reboot v4.6.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+html {
+  font-family: sans-serif;
+  line-height: 1.15;
+  -webkit-text-size-adjust: 100%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
+  display: block;
+}
+
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+  font-size: 1rem;
+  font-weight: 400;
+  line-height: 1.5;
+  color: #212529;
+  text-align: left;
+  background-color: #fff;
+}
+
+[tabindex="-1"]:focus:not(:focus-visible) {
+  outline: 0 !important;
+}
+
+hr {
+  box-sizing: content-box;
+  height: 0;
+  overflow: visible;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  margin-top: 0;
+  margin-bottom: 0.5rem;
+}
+
+p {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+abbr[title],
+abbr[data-original-title] {
+  text-decoration: underline;
+  -webkit-text-decoration: underline dotted;
+  text-decoration: underline dotted;
+  cursor: help;
+  border-bottom: 0;
+  -webkit-text-decoration-skip-ink: none;
+  text-decoration-skip-ink: none;
+}
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: 700;
+}
+
+dd {
+  margin-bottom: .5rem;
+  margin-left: 0;
+}
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+small {
+  font-size: 80%;
+}
+
+sub,
+sup {
+  position: relative;
+  font-size: 75%;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -.25em;
+}
+
+sup {
+  top: -.5em;
+}
+
+a {
+  color: #007bff;
+  text-decoration: none;
+  background-color: transparent;
+}
+
+a:hover {
+  color: #0056b3;
+  text-decoration: underline;
+}
+
+a:not([href]):not([class]) {
+  color: inherit;
+  text-decoration: none;
+}
+
+a:not([href]):not([class]):hover {
+  color: inherit;
+  text-decoration: none;
+}
+
+pre,
+code,
+kbd,
+samp {
+  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  font-size: 1em;
+}
+
+pre {
+  margin-top: 0;
+  margin-bottom: 1rem;
+  overflow: auto;
+  -ms-overflow-style: scrollbar;
+}
+
+figure {
+  margin: 0 0 1rem;
+}
+
+img {
+  vertical-align: middle;
+  border-style: none;
+}
+
+svg {
+  overflow: hidden;
+  vertical-align: middle;
+}
+
+table {
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: 0.75rem;
+  padding-bottom: 0.75rem;
+  color: #6c757d;
+  text-align: left;
+  caption-side: bottom;
+}
+
+th {
+  text-align: inherit;
+  text-align: -webkit-match-parent;
+}
+
+label {
+  display: inline-block;
+  margin-bottom: 0.5rem;
+}
+
+button {
+  border-radius: 0;
+}
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0;
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+button,
+input {
+  overflow: visible;
+}
+
+button,
+select {
+  text-transform: none;
+}
+
+[role="button"] {
+  cursor: pointer;
+}
+
+select {
+  word-wrap: normal;
+}
+
+button,
+[type="button"],
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button;
+}
+
+button:not(:disabled),
+[type="button"]:not(:disabled),
+[type="reset"]:not(:disabled),
+[type="submit"]:not(:disabled) {
+  cursor: pointer;
+}
+
+button::-moz-focus-inner,
+[type="button"]::-moz-focus-inner,
+[type="reset"]::-moz-focus-inner,
+[type="submit"]::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+input[type="radio"],
+input[type="checkbox"] {
+  box-sizing: border-box;
+  padding: 0;
+}
+
+textarea {
+  overflow: auto;
+  resize: vertical;
+}
+
+fieldset {
+  min-width: 0;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+legend {
+  display: block;
+  width: 100%;
+  max-width: 100%;
+  padding: 0;
+  margin-bottom: .5rem;
+  font-size: 1.5rem;
+  line-height: inherit;
+  color: inherit;
+  white-space: normal;
+}
+
+progress {
+  vertical-align: baseline;
+}
+
+[type="number"]::-webkit-inner-spin-button,
+[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+[type="search"] {
+  outline-offset: -2px;
+  -webkit-appearance: none;
+}
+
+[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+::-webkit-file-upload-button {
+  font: inherit;
+  -webkit-appearance: button;
+}
+
+output {
+  display: inline-block;
+}
+
+summary {
+  display: list-item;
+  cursor: pointer;
+}
+
+template {
+  display: none;
+}
+
+[hidden] {
+  display: none !important;
+}
+/*# sourceMappingURL=bootstrap-reboot.css.map */

Diagram-Canvas/Content/bootstrap-reboot.min.css

@@ -0,0 +1,8 @@
+/*!
+ * Bootstrap Reboot v4.6.0 (https://getbootstrap.com/)
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
+ */*,::after,::before{box-sizing:border-box}html{font-family:sans-serif;line-height:1.15;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}article,aside,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Liberation Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";font-size:1rem;font-weight:400;line-height:1.5;color:#212529;text-align:left;background-color:#fff}[tabindex="-1"]:focus:not(:focus-visible){outline:0!important}hr{box-sizing:content-box;height:0;overflow:visible}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5rem}p{margin-top:0;margin-bottom:1rem}abbr[data-original-title],abbr[title]{text-decoration:underline;-webkit-text-decoration:underline dotted;text-decoration:underline dotted;cursor:help;border-bottom:0;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none}address{margin-bottom:1rem;font-style:normal;line-height:inherit}dl,ol,ul{margin-top:0;margin-bottom:1rem}ol ol,ol ul,ul ol,ul ul{margin-bottom:0}dt{font-weight:700}dd{margin-bottom:.5rem;margin-left:0}blockquote{margin:0 0 1rem}b,strong{font-weight:bolder}small{font-size:80%}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:#007bff;text-decoration:none;background-color:transparent}a:hover{color:#0056b3;text-decoration:underline}a:not([href]):not([class]){color:inherit;text-decoration:none}a:not([href]):not([class]):hover{color:inherit;text-decoration:none}code,kbd,pre,samp{font-family:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em}pre{margin-top:0;margin-bottom:1rem;overflow:auto;-ms-overflow-style:scrollbar}figure{margin:0 0 1rem}img{vertical-align:middle;border-style:none}svg{overflow:hidden;vertical-align:middle}table{border-collapse:collapse}caption{padding-top:.75rem;padding-bottom:.75rem;color:#6c757d;text-align:left;caption-side:bottom}th{text-align:inherit;text-align:-webkit-match-parent}label{display:inline-block;margin-bottom:.5rem}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,input{overflow:visible}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{padding:0;border-style:none}input[type=checkbox],input[type=radio]{box-sizing:border-box;padding:0}textarea{overflow:auto;resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{display:block;width:100%;max-width:100%;padding:0;margin-bottom:.5rem;font-size:1.5rem;line-height:inherit;color:inherit;white-space:normal}progress{vertical-align:baseline}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:none}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}summary{display:list-item;cursor:pointer}template{display:none}[hidden]{display:none!important}
+/*# sourceMappingURL=bootstrap-reboot.min.css.map */

Diagram-Canvas/Diagram.js

@@ -1,25 +0,0 @@
-var canvas = document.getElementsByTagName("canvas")[0]; 
-var but1 = document.getElementById('submit'); 
-
-function Resize() {
-    canvas.style.margin = "10px";
-    canvas.width = window.innerWidth - 20;
-    canvas.height = window.innerHeight - 70;
-}
-
-window.addEventListener("load", Resize, false);
-window.addEventListener("resize", Resize, false);
-
-but1.onclick = function () {
-    var ctx = canvas.getContext("2d");
-    ctx.clearRect(0, 0, window.innerWidth, window.innerHeight);
-
-    for (var i = 0; i < 10; i++) {
-        for (var j = 0; j < 20; j++) {
-            var t = new BlinkStatus(5 + 35 * i, 5 + 20 * j, 30, 15);
-            t.BuildDefault();
-            t.status = Math.floor(Math.random() * 4);
-            t.Print(ctx);
-        }
-    }
-}

Diagram-Canvas/Scripts/README.md

@@ -0,0 +1,220 @@
+<!-- IGNORE THE HTML BLOCK BELOW, THE INTERESTING PART IS AFTER IT -->
+
+<h1 align="center">Popper.js</h1>
+
+<p align="center">
+    <strong>A library used to position poppers in web applications.</strong>
+</p>
+
+<p align="center">
+    <img src="http://badge-size.now.sh/https://unpkg.com/popper.js/dist/popper.min.js?compression=brotli" alt="Stable Release Size"/>
+  <img src="http://badge-size.now.sh/https://unpkg.com/popper.js/dist/popper.min.js?compression=gzip" alt="Stable Release Size"/>
+    <a href="https://codeclimate.com/github/FezVrasta/popper.js/coverage"><img src="https://codeclimate.com/github/FezVrasta/popper.js/badges/coverage.svg" alt="Istanbul Code Coverage"/></a>
+    <a href="https://www.npmjs.com/browse/depended/popper.js"><img src="https://badgen.net/npm/dependents/popper.js" alt="Dependents packages" /></a>
+    <a href="https://spectrum.chat/popper-js" target="_blank"><img src="https://img.shields.io/badge/chat-on_spectrum-6833F9.svg?logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPHN2ZyBpZD0iTGl2ZWxsb18xIiBkYXRhLW5hbWU9IkxpdmVsbG8gMSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2aWV3Qm94PSIwIDAgMTAgOCI%2BPGRlZnM%2BPHN0eWxlPi5jbHMtMXtmaWxsOiNmZmY7fTwvc3R5bGU%2BPC9kZWZzPjx0aXRsZT5zcGVjdHJ1bTwvdGl0bGU%2BPHBhdGggY2xhc3M9ImNscy0xIiBkPSJNNSwwQy40MiwwLDAsLjYzLDAsMy4zNGMwLDEuODQuMTksMi43MiwxLjc0LDMuMWgwVjcuNThhLjQ0LjQ0LDAsMCwwLC42OC4zNUw0LjM1LDYuNjlINWM0LjU4LDAsNS0uNjMsNS0zLjM1UzkuNTgsMCw1LDBaTTIuODMsNC4xOGEuNjMuNjMsMCwxLDEsLjY1LS42M0EuNjQuNjQsMCwwLDEsMi44Myw0LjE4Wk01LDQuMThhLjYzLjYzLDAsMSwxLC42NS0uNjNBLjY0LjY0LDAsMCwxLDUsNC4xOFptMi4xNywwYS42My42MywwLDEsMSwuNjUtLjYzQS42NC42NCwwLDAsMSw3LjE3LDQuMThaIi8%2BPC9zdmc%2B" alt="Get support or discuss"/></a>
+    <br />
+    <a href="https://travis-ci.org/FezVrasta/popper.js/branches" target="_blank"><img src="https://travis-ci.org/FezVrasta/popper.js.svg?branch=master" alt="Build Status"/></a>
+    <a href="https://saucelabs.com/u/popperjs" target="_blank"><img src="https://badges.herokuapp.com/browsers?labels=none&googlechrome=latest&firefox=latest&microsoftedge=latest&iexplore=11,10&safari=latest" alt="SauceLabs Reports"/></a>
+</p>
+
+<img src="https://raw.githubusercontent.com/FezVrasta/popper.js/master/popperjs.png" align="right" width=250 />
+
+<!-- 🚨 HEY! HERE BEGINS THE INTERESTING STUFF 🚨 -->
+
+## Wut? Poppers?
+
+A popper is an element on the screen which "pops out" from the natural flow of your application.  
+Common examples of poppers are tooltips, popovers and drop-downs.
+
+
+## So, yet another tooltip library?
+
+Well, basically, **no**.  
+Popper.js is a **positioning engine**, its purpose is to calculate the position of an element
+to make it possible to position it near a given reference element.  
+
+The engine is completely modular and most of its features are implemented as **modifiers**
+(similar to middlewares or plugins).  
+The whole code base is written in ES2015 and its features are automatically tested on real browsers thanks to [SauceLabs](https://saucelabs.com/) and [TravisCI](https://travis-ci.org/).
+
+Popper.js has zero dependencies. No jQuery, no LoDash, nothing.  
+It's used by big companies like [Twitter in Bootstrap v4](https://getbootstrap.com/), [Microsoft in WebClipper](https://github.com/OneNoteDev/WebClipper) and [Atlassian in AtlasKit](https://aui-cdn.atlassian.com/atlaskit/registry/).
+
+### Popper.js
+
+This is the engine, the library that computes and, optionally, applies the styles to
+the poppers.
+
+Some of the key points are:
+
+- Position elements keeping them in their original DOM context (doesn't mess with your DOM!);
+- Allows to export the computed informations to integrate with React and other view libraries;
+- Supports Shadow DOM elements;
+- Completely customizable thanks to the modifiers based structure;
+
+Visit our [project page](https://fezvrasta.github.io/popper.js) to see a lot of examples of what you can do with Popper.js!
+
+Find [the documentation here](/docs/_includes/popper-documentation.md).
+
+
+### Tooltip.js
+
+Since lots of users just need a simple way to integrate powerful tooltips in their projects,
+we created **Tooltip.js**.  
+It's a small library that makes it easy to automatically create tooltips using as engine Popper.js.  
+Its API is almost identical to the famous tooltip system of Bootstrap, in this way it will be
+easy to integrate it in your projects.  
+The tooltips generated by Tooltip.js are accessible thanks to the `aria` tags.
+
+Find [the documentation here](/docs/_includes/tooltip-documentation.md).
+
+
+## Installation
+Popper.js is available on the following package managers and CDNs:
+
+| Source |                                                                                  |
+|:-------|:---------------------------------------------------------------------------------|
+| npm    | `npm install popper.js --save`                                                   |
+| yarn   | `yarn add popper.js`                                                             |
+| NuGet  | `PM> Install-Package popper.js`                                                  |
+| Bower  | `bower install popper.js --save`                     |
+| unpkg  | [`https://unpkg.com/popper.js`](https://unpkg.com/popper.js)                     |
+| cdnjs  | [`https://cdnjs.com/libraries/popper.js`](https://cdnjs.com/libraries/popper.js) |
+
+Tooltip.js as well:
+
+| Source |                                                                                  |
+|:-------|:---------------------------------------------------------------------------------|
+| npm    | `npm install tooltip.js --save`                                                  |
+| yarn   | `yarn add tooltip.js`                                                            |
+| Bower* | `bower install tooltip.js=https://unpkg.com/tooltip.js --save`                   |
+| unpkg  | [`https://unpkg.com/tooltip.js`](https://unpkg.com/tooltip.js)                   |
+| cdnjs  | [`https://cdnjs.com/libraries/popper.js`](https://cdnjs.com/libraries/popper.js) |
+
+\*: Bower isn't officially supported, it can be used to install Tooltip.js only trough the unpkg.com CDN. This method has the limitation of not being able to define a specific version of the library. Bower and Popper.js suggests to use npm or Yarn for your projects.  
+For more info, [read the related issue](https://github.com/FezVrasta/popper.js/issues/390).
+
+### Dist targets
+
+Popper.js is currently shipped with 3 targets in mind: UMD, ESM and ESNext.
+
+- UMD - Universal Module Definition: AMD, RequireJS and globals;
+- ESM - ES Modules: For webpack/Rollup or browser supporting the spec;
+- ESNext: Available in `dist/`, can be used with webpack and `babel-preset-env`;
+
+Make sure to use the right one for your needs. If you want to import it with a `<script>` tag, use UMD.
+
+## Usage
+
+Given an existing popper DOM node, ask Popper.js to position it near its button
+
+```js
+var reference = document.querySelector('.my-button');
+var popper = document.querySelector('.my-popper');
+var anotherPopper = new Popper(
+    reference,
+    popper,
+    {
+        // popper options here
+    }
+);
+```
+
+### Callbacks
+
+Popper.js supports two kinds of callbacks, the `onCreate` callback is called after
+the popper has been initialized. The `onUpdate` one is called on any subsequent update.
+
+```js
+const reference = document.querySelector('.my-button');
+const popper = document.querySelector('.my-popper');
+new Popper(reference, popper, {
+    onCreate: (data) => {
+        // data is an object containing all the informations computed
+        // by Popper.js and used to style the popper and its arrow
+        // The complete description is available in Popper.js documentation
+    },
+    onUpdate: (data) => {
+        // same as `onCreate` but called on subsequent updates
+    }
+});
+```
+
+### Writing your own modifiers
+
+Popper.js is based on a "plugin-like" architecture, most of its features are fully encapsulated "modifiers".  
+A modifier is a function that is called each time Popper.js needs to compute the position of the popper. For this reason, modifiers should be very performant to avoid bottlenecks.  
+
+To learn how to create a modifier, [read the modifiers documentation](docs/_includes/popper-documentation.md#modifiers--object)
+
+
+### React, Vue.js, Angular, AngularJS, Ember.js (etc...) integration
+
+Integrating 3rd party libraries in React or other libraries can be a pain because
+they usually alter the DOM and drive the libraries crazy.  
+Popper.js limits all its DOM modifications inside the `applyStyle` modifier,
+you can simply disable it and manually apply the popper coordinates using
+your library of choice.  
+
+For a comprehensive list of libraries that let you use Popper.js into existing
+frameworks, visit the [MENTIONS](/MENTIONS.md) page.
+
+Alternatively, you may even override your own `applyStyles` with your custom one and
+integrate Popper.js by yourself!
+
+```js
+function applyReactStyle(data) {
+    // export data in your framework and use its content to apply the style to your popper
+};
+
+const reference = document.querySelector('.my-button');
+const popper = document.querySelector('.my-popper');
+new Popper(reference, popper, {
+    modifiers: {
+        applyStyle: { enabled: false },
+        applyReactStyle: {
+            enabled: true,
+            fn: applyReactStyle,
+            order: 800,
+        },
+    },
+});
+
+```
+
+### Migration from Popper.js v0
+
+Since the API changed, we prepared some migration instructions to make it easy to upgrade to
+Popper.js v1.  
+
+https://github.com/FezVrasta/popper.js/issues/62
+
+Feel free to comment inside the issue if you have any questions.
+
+### Performances
+
+Popper.js is very performant. It usually takes 0.5ms to compute a popper's position (on an iMac with 3.5G GHz Intel Core i5).  
+This means that it will not cause any [jank](https://www.chromium.org/developers/how-tos/trace-event-profiling-tool/anatomy-of-jank), leading to a smooth user experience.
+
+## Notes
+
+### Libraries using Popper.js
+
+The aim of Popper.js is to provide a stable and powerful positioning engine ready to
+be used in 3rd party libraries.  
+
+Visit the [MENTIONS](/MENTIONS.md) page for an updated list of projects.
+
+
+### Credits
+I want to thank some friends and projects for the work they did:
+
+- [@AndreaScn](https://github.com/AndreaScn) for his work on the GitHub Page and the manual testing he did during the development;
+- [@vampolo](https://github.com/vampolo) for the original idea and for the name of the library;
+- [Sysdig](https://github.com/Draios) for all the awesome things I learned during these years that made it possible for me to write this library;
+- [Tether.js](http://github.hubspot.com/tether/) for having inspired me in writing a positioning library ready for the real world;
+- [The Contributors](https://github.com/FezVrasta/popper.js/graphs/contributors) for their much appreciated Pull Requests and bug reports;
+- **you** for the star you'll give to this project and for being so awesome to give this project a try 🙂
+
+### Copyright and license
+Code and documentation copyright 2016 **Federico Zivolo**. Code released under the [MIT license](LICENSE.md). Docs released under Creative Commons.

Diagram-Canvas/Scripts/index.d.ts

@@ -0,0 +1,179 @@
+/**
+ * @fileoverview This file only declares the public portions of the API.
+ * It should not define internal pieces such as utils or modifier details.
+ *
+ * Original definitions by: edcarroll <https://github.com/edcarroll>, ggray <https://github.com/giladgray>, rhysd <https://rhysd.github.io>, joscha <https://github.com/joscha>, seckardt <https://github.com/seckardt>, marcfallows <https://github.com/marcfallows>
+ */
+
+/**
+ * This kind of namespace declaration is not necessary, but is kept here for backwards-compatibility with
+ * popper.js 1.x. It can be removed in 2.x so that the default export is simply the Popper class
+ * and all the types / interfaces are top-level named exports.
+ */
+declare namespace Popper {
+  export type Position = 'top' | 'right' | 'bottom' | 'left';
+
+  export type Placement = 'auto-start'
+    | 'auto'
+    | 'auto-end'
+    | 'top-start'
+    | 'top'
+    | 'top-end'
+    | 'right-start'
+    | 'right'
+    | 'right-end'
+    | 'bottom-end'
+    | 'bottom'
+    | 'bottom-start'
+    | 'left-end'
+    | 'left'
+    | 'left-start';
+
+  export type Boundary = 'scrollParent' | 'viewport' | 'window';
+
+  export type Behavior = 'flip' | 'clockwise' | 'counterclockwise';
+
+  export type ModifierFn = (data: Data, options: Object) => Data;
+
+  export interface Attributes {
+    'x-out-of-boundaries': '' | false;
+    'x-placement': Placement;
+  }
+
+  export interface Padding {
+    top?: number,
+    bottom?: number,
+    left?: number,
+    right?: number,
+  }
+
+  export interface BaseModifier {
+    order?: number;
+    enabled?: boolean;
+    fn?: ModifierFn;
+  }
+
+  export interface Modifiers {
+    shift?: BaseModifier;
+    offset?: BaseModifier & {
+      offset?: number | string,
+    };
+    preventOverflow?: BaseModifier & {
+      priority?: Position[],
+      padding?: number | Padding,
+      boundariesElement?: Boundary | Element,
+      escapeWithReference?: boolean
+    };
+    keepTogether?: BaseModifier;
+    arrow?: BaseModifier & {
+      element?: string | Element,
+    };
+    flip?: BaseModifier & {
+      behavior?: Behavior | Position[],
+      padding?: number | Padding,
+      boundariesElement?: Boundary | Element,
+      flipVariations?: boolean,
+      flipVariationsByContent?: boolean,
+    };
+    inner?: BaseModifier;
+    hide?: BaseModifier;
+    applyStyle?: BaseModifier & {
+      onLoad?: Function,
+      gpuAcceleration?: boolean,
+    };
+    computeStyle?: BaseModifier & {
+      gpuAcceleration?: boolean;
+      x?: 'bottom' | 'top',
+      y?: 'left' | 'right'
+    };
+
+    [name: string]: (BaseModifier & Record<string, any>) | undefined;
+  }
+
+  export interface Offset {
+    top: number;
+    left: number;
+    width: number;
+    height: number;
+  }
+
+  export interface Data {
+    instance: Popper;
+    placement: Placement;
+    originalPlacement: Placement;
+    flipped: boolean;
+    hide: boolean;
+    arrowElement: Element;
+    styles: CSSStyleDeclaration;
+    arrowStyles: CSSStyleDeclaration;
+    attributes: Attributes;
+    boundaries: Object;
+    offsets: {
+      popper: Offset,
+      reference: Offset,
+      arrow: {
+        top: number,
+        left: number,
+      },
+    };
+  }
+
+  export interface PopperOptions {
+    placement?: Placement;
+    positionFixed?: boolean;
+    eventsEnabled?: boolean;
+    modifiers?: Modifiers;
+    removeOnDestroy?: boolean;
+
+    onCreate?(data: Data): void;
+
+    onUpdate?(data: Data): void;
+  }
+
+  export interface ReferenceObject {
+    clientHeight: number;
+    clientWidth: number;
+    referenceNode?: Node;
+
+    getBoundingClientRect(): ClientRect;
+  }
+}
+
+// Re-export types in the Popper namespace so that they can be accessed as top-level named exports.
+// These re-exports should be removed in 2.x when the "declare namespace Popper" syntax is removed.
+export type Padding = Popper.Padding;
+export type Position = Popper.Position;
+export type Placement = Popper.Placement;
+export type Boundary = Popper.Boundary;
+export type Behavior = Popper.Behavior;
+export type ModifierFn = Popper.ModifierFn;
+export type BaseModifier = Popper.BaseModifier;
+export type Modifiers = Popper.Modifiers;
+export type Offset = Popper.Offset;
+export type Data = Popper.Data;
+export type PopperOptions = Popper.PopperOptions;
+export type ReferenceObject = Popper.ReferenceObject;
+
+declare class Popper {
+  static modifiers: (BaseModifier & { name: string })[];
+  static placements: Placement[];
+  static Defaults: PopperOptions;
+
+  options: PopperOptions;
+  popper: Element;
+  reference: Element | ReferenceObject;
+
+  constructor(reference: Element | ReferenceObject, popper: Element, options?: PopperOptions);
+
+  destroy(): void;
+
+  update(): void;
+
+  scheduleUpdate(): void;
+
+  enableEventListeners(): void;
+
+  disableEventListeners(): void;
+}
+
+export default Popper;

Diagram-Canvas/Scripts/index.js.flow

@@ -0,0 +1,156 @@
+// @flow
+
+export type Position = 'top' | 'right' | 'bottom' | 'left';
+
+export type Placement =
+  | 'auto-start'
+  | 'auto'
+  | 'auto-end'
+  | 'top-start'
+  | 'top'
+  | 'top-end'
+  | 'right-start'
+  | 'right'
+  | 'right-end'
+  | 'bottom-end'
+  | 'bottom'
+  | 'bottom-start'
+  | 'left-end'
+  | 'left'
+  | 'left-start';
+
+export type Offset = {
+  top: number,
+  left: number,
+  width: number,
+  height: number,
+  position: Position,
+};
+
+export type Boundary = 'scrollParent' | 'viewport' | 'window';
+
+export type Behavior = 'flip' | 'clockwise' | 'counterclockwise';
+
+export type Data = {
+  instance: Popper,
+  placement: Placement,
+  originalPlacement: Placement,
+  flipped: boolean,
+  hide: boolean,
+  arrowElement: Element,
+  styles: CSSStyleDeclaration,
+  arrowStyles: CSSStyleDeclaration,
+  boundaries: Object,
+  offsets: {
+    popper: Offset,
+    reference: Offset,
+    arrow: {
+      top: number,
+      left: number,
+    },
+  },
+};
+
+export type ModifierFn = (data: Data, options: Object) => Data;
+
+export type Padding = {
+  top?: number,
+  bottom?: number,
+  left?: number,
+  right?: number,
+};
+
+export type BaseModifier = {
+  order?: number,
+  enabled?: boolean,
+  fn?: ModifierFn,
+};
+
+export type Modifiers = {
+  shift?: BaseModifier,
+  offset?: BaseModifier & {
+    offset?: number | string,
+  },
+  preventOverflow?: BaseModifier & {
+    priority?: Position[],
+    padding?: number | Padding,
+    boundariesElement?: Boundary | Element,
+    escapeWithReference?: boolean,
+  },
+  keepTogether?: BaseModifier,
+  arrow?: BaseModifier & {
+    element?: string | Element | null,
+  },
+  flip?: BaseModifier & {
+    behavior?: Behavior | Position[],
+    padding?: number | Padding,
+    boundariesElement?: Boundary | Element,
+    flipVariations?: boolean,
+    flipVariationsByContent?: boolean,
+  },
+  inner?: BaseModifier,
+  hide?: BaseModifier,
+  applyStyle?: BaseModifier & {
+    onLoad?: Function,
+    gpuAcceleration?: boolean,
+  },
+  computeStyle?: BaseModifier & {
+    gpuAcceleration?: boolean,
+    x?: 'bottom' | 'top',
+    y?: 'left' | 'right',
+  },
+
+  [name: string]: (BaseModifier & { [string]: * }) | null,
+};
+
+export type Options = {
+  placement?: Placement,
+  positionFixed?: boolean,
+  eventsEnabled?: boolean,
+  modifiers?: Modifiers,
+  removeOnDestroy?: boolean,
+
+  onCreate?: (data: Data) => void,
+
+  onUpdate?: (data: Data) => void,
+};
+
+export type ReferenceObject = {
+  +clientHeight: number,
+  +clientWidth: number,
+  +referenceNode?: Node,
+
+  getBoundingClientRect():
+    | ClientRect
+    | {
+        width: number,
+        height: number,
+        top: number,
+        right: number,
+        bottom: number,
+        left: number,
+      },
+};
+
+export type Instance = {
+  destroy: () => void,
+  scheduleUpdate: () => void,
+  update: () => void,
+  enableEventListeners: () => void,
+  disableEventListeners: () => void,
+};
+
+declare class Popper {
+  static placements: Placement;
+
+  popper: Element;
+  reference: Element | ReferenceObject;
+
+  constructor(
+    reference: Element | ReferenceObject,
+    popper: Element,
+    options?: Options
+  ): Instance;
+}
+
+declare export default typeof Popper;

Diagram-Canvas/Scripts/src/index.js

@@ -0,0 +1,154 @@
+// Utils
+import debounce from './utils/debounce';
+import isFunction from './utils/isFunction';
+
+// Methods
+import update from './methods/update';
+import destroy from './methods/destroy';
+import enableEventListeners from './methods/enableEventListeners';
+import disableEventListeners from './methods/disableEventListeners';
+import Defaults from './methods/defaults';
+import placements from './methods/placements';
+
+export default class Popper {
+  /**
+   * Creates a new Popper.js instance.
+   * @class Popper
+   * @param {Element|referenceObject} reference - The reference element used to position the popper
+   * @param {Element} popper - The HTML / XML element used as the popper
+   * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
+   * @return {Object} instance - The generated Popper.js instance
+   */
+  constructor(reference, popper, options = {}) {
+    // make update() debounced, so that it only runs at most once-per-tick
+    this.update = debounce(this.update.bind(this));
+
+    // with {} we create a new object with the options inside it
+    this.options = { ...Popper.Defaults, ...options };
+
+    // init state
+    this.state = {
+      isDestroyed: false,
+      isCreated: false,
+      scrollParents: [],
+    };
+
+    // get reference and popper elements (allow jQuery wrappers)
+    this.reference = reference && reference.jquery ? reference[0] : reference;
+    this.popper = popper && popper.jquery ? popper[0] : popper;
+
+    // Deep merge modifiers options
+    this.options.modifiers = {};
+    Object.keys({
+      ...Popper.Defaults.modifiers,
+      ...options.modifiers,
+    }).forEach(name => {
+      this.options.modifiers[name] = {
+        // If it's a built-in modifier, use it as base
+        ...(Popper.Defaults.modifiers[name] || {}),
+        // If there are custom options, override and merge with default ones
+        ...(options.modifiers ? options.modifiers[name] : {}),
+      };
+    });
+
+    // Refactoring modifiers' list (Object => Array)
+    this.modifiers = Object.keys(this.options.modifiers)
+      .map(name => ({
+        name,
+        ...this.options.modifiers[name],
+      }))
+      // sort the modifiers by order
+      .sort((a, b) => a.order - b.order);
+
+    // modifiers have the ability to execute arbitrary code when Popper.js get inited
+    // such code is executed in the same order of its modifier
+    // they could add new properties to their options configuration
+    // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
+    this.modifiers.forEach(modifierOptions => {
+      if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
+        modifierOptions.onLoad(
+          this.reference,
+          this.popper,
+          this.options,
+          modifierOptions,
+          this.state
+        );
+      }
+    });
+
+    // fire the first update to position the popper in the right place
+    this.update();
+
+    const eventsEnabled = this.options.eventsEnabled;
+    if (eventsEnabled) {
+      // setup event listeners, they will take care of update the position in specific situations
+      this.enableEventListeners();
+    }
+
+    this.state.eventsEnabled = eventsEnabled;
+  }
+
+  // We can't use class properties because they don't get listed in the
+  // class prototype and break stuff like Sinon stubs
+  update() {
+    return update.call(this);
+  }
+  destroy() {
+    return destroy.call(this);
+  }
+  enableEventListeners() {
+    return enableEventListeners.call(this);
+  }
+  disableEventListeners() {
+    return disableEventListeners.call(this);
+  }
+
+  /**
+   * Schedules an update. It will run on the next UI update available.
+   * @method scheduleUpdate
+   * @memberof Popper
+   */
+  scheduleUpdate = () => requestAnimationFrame(this.update);
+
+  /**
+   * Collection of utilities useful when writing custom modifiers.
+   * Starting from version 1.7, this method is available only if you
+   * include `popper-utils.js` before `popper.js`.
+   *
+   * **DEPRECATION**: This way to access PopperUtils is deprecated
+   * and will be removed in v2! Use the PopperUtils module directly instead.
+   * Due to the high instability of the methods contained in Utils, we can't
+   * guarantee them to follow semver. Use them at your own risk!
+   * @static
+   * @private
+   * @type {Object}
+   * @deprecated since version 1.8
+   * @member Utils
+   * @memberof Popper
+   */
+  static Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
+
+  static placements = placements;
+
+  static Defaults = Defaults;
+}
+
+/**
+ * The `referenceObject` is an object that provides an interface compatible with Popper.js
+ * and lets you use it as replacement of a real DOM node.<br />
+ * You can use this method to position a popper relatively to a set of coordinates
+ * in case you don't have a DOM node to use as reference.
+ *
+ * ```
+ * new Popper(referenceObject, popperNode);
+ * ```
+ *
+ * NB: This feature isn't supported in Internet Explorer 10.
+ * @name referenceObject
+ * @property {Function} data.getBoundingClientRect
+ * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
+ * @property {number} data.clientWidth
+ * An ES6 getter that will return the width of the virtual reference element.
+ * @property {number} data.clientHeight
+ * An ES6 getter that will return the height of the virtual reference element.
+ */

Diagram-Canvas/Scripts/src/methods/defaults.js

@@ -0,0 +1,79 @@
+import modifiers from '../modifiers/index';
+
+/**
+ * Default options provided to Popper.js constructor.<br />
+ * These can be overridden using the `options` argument of Popper.js.<br />
+ * To override an option, simply pass an object with the same
+ * structure of the `options` object, as the 3rd argument. For example:
+ * ```
+ * new Popper(ref, pop, {
+ *   modifiers: {
+ *     preventOverflow: { enabled: false }
+ *   }
+ * })
+ * ```
+ * @type {Object}
+ * @static
+ * @memberof Popper
+ */
+export default {
+  /**
+   * Popper's placement.
+   * @prop {Popper.placements} placement='bottom'
+   */
+  placement: 'bottom',
+
+  /**
+   * Set this to true if you want popper to position it self in 'fixed' mode
+   * @prop {Boolean} positionFixed=false
+   */
+  positionFixed: false,
+
+  /**
+   * Whether events (resize, scroll) are initially enabled.
+   * @prop {Boolean} eventsEnabled=true
+   */
+  eventsEnabled: true,
+
+  /**
+   * Set to true if you want to automatically remove the popper when
+   * you call the `destroy` method.
+   * @prop {Boolean} removeOnDestroy=false
+   */
+  removeOnDestroy: false,
+
+  /**
+   * Callback called when the popper is created.<br />
+   * By default, it is set to no-op.<br />
+   * Access Popper.js instance with `data.instance`.
+   * @prop {onCreate}
+   */
+  onCreate: () => {},
+
+  /**
+   * Callback called when the popper is updated. This callback is not called
+   * on the initialization/creation of the popper, but only on subsequent
+   * updates.<br />
+   * By default, it is set to no-op.<br />
+   * Access Popper.js instance with `data.instance`.
+   * @prop {onUpdate}
+   */
+  onUpdate: () => {},
+
+  /**
+   * List of modifiers used to modify the offsets before they are applied to the popper.
+   * They provide most of the functionalities of Popper.js.
+   * @prop {modifiers}
+   */
+  modifiers,
+};
+
+/**
+ * @callback onCreate
+ * @param {dataObject} data
+ */
+
+/**
+ * @callback onUpdate
+ * @param {dataObject} data
+ */

Diagram-Canvas/Scripts/src/methods/destroy.js

@@ -0,0 +1,32 @@
+import isModifierEnabled from '../utils/isModifierEnabled';
+import getSupportedPropertyName from '../utils/getSupportedPropertyName';
+
+/**
+ * Destroys the popper.
+ * @method
+ * @memberof Popper
+ */
+export default function destroy() {
+  this.state.isDestroyed = true;
+
+  // touch DOM only if `applyStyle` modifier is enabled
+  if (isModifierEnabled(this.modifiers, 'applyStyle')) {
+    this.popper.removeAttribute('x-placement');
+    this.popper.style.position = '';
+    this.popper.style.top = '';
+    this.popper.style.left = '';
+    this.popper.style.right = '';
+    this.popper.style.bottom = '';
+    this.popper.style.willChange = '';
+    this.popper.style[getSupportedPropertyName('transform')] = '';
+  }
+
+  this.disableEventListeners();
+
+  // remove the popper if user explicitly asked for the deletion on destroy
+  // do not use `remove` because IE11 doesn't support it
+  if (this.options.removeOnDestroy) {
+    this.popper.parentNode.removeChild(this.popper);
+  }
+  return this;
+}

Diagram-Canvas/Scripts/src/methods/disableEventListeners.js

@@ -0,0 +1,15 @@
+import removeEventListeners from '../utils/removeEventListeners';
+
+/**
+ * It will remove resize/scroll events and won't recalculate popper position
+ * when they are triggered. It also won't trigger `onUpdate` callback anymore,
+ * unless you call `update` method manually.
+ * @method
+ * @memberof Popper
+ */
+export default function disableEventListeners() {
+  if (this.state.eventsEnabled) {
+    cancelAnimationFrame(this.scheduleUpdate);
+    this.state = removeEventListeners(this.reference, this.state);
+  }
+}

Diagram-Canvas/Scripts/src/methods/enableEventListeners.js

@@ -0,0 +1,18 @@
+import setupEventListeners from '../utils/setupEventListeners';
+
+/**
+ * It will add resize/scroll events and start recalculating
+ * position of the popper element when they are triggered.
+ * @method
+ * @memberof Popper
+ */
+export default function enableEventListeners() {
+  if (!this.state.eventsEnabled) {
+    this.state = setupEventListeners(
+      this.reference,
+      this.options,
+      this.state,
+      this.scheduleUpdate
+    );
+  }
+}

Diagram-Canvas/Scripts/src/methods/placements.js

@@ -0,0 +1,48 @@
+/**
+ * List of accepted placements to use as values of the `placement` option.<br />
+ * Valid placements are:
+ * - `auto`
+ * - `top`
+ * - `right`
+ * - `bottom`
+ * - `left`
+ *
+ * Each placement can have a variation from this list:
+ * - `-start`
+ * - `-end`
+ *
+ * Variations are interpreted easily if you think of them as the left to right
+ * written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
+ * is right.<br />
+ * Vertically (`left` and `right`), `start` is top and `end` is bottom.
+ *
+ * Some valid examples are:
+ * - `top-end` (on top of reference, right aligned)
+ * - `right-start` (on right of reference, top aligned)
+ * - `bottom` (on bottom, centered)
+ * - `auto-end` (on the side with more space available, alignment depends by placement)
+ *
+ * @static
+ * @type {Array}
+ * @enum {String}
+ * @readonly
+ * @method placements
+ * @memberof Popper
+ */
+export default [
+  'auto-start',
+  'auto',
+  'auto-end',
+  'top-start',
+  'top',
+  'top-end',
+  'right-start',
+  'right',
+  'right-end',
+  'bottom-end',
+  'bottom',
+  'bottom-start',
+  'left-end',
+  'left',
+  'left-start',
+];

Diagram-Canvas/Scripts/src/methods/update.js

@@ -0,0 +1,75 @@
+import computeAutoPlacement from '../utils/computeAutoPlacement';
+import getReferenceOffsets from '../utils/getReferenceOffsets';
+import getPopperOffsets from '../utils/getPopperOffsets';
+import runModifiers from '../utils/runModifiers';
+
+/**
+ * Updates the position of the popper, computing the new offsets and applying
+ * the new style.<br />
+ * Prefer `scheduleUpdate` over `update` because of performance reasons.
+ * @method
+ * @memberof Popper
+ */
+export default function update() {
+  // if popper is destroyed, don't perform any further update
+  if (this.state.isDestroyed) {
+    return;
+  }
+
+  let data = {
+    instance: this,
+    styles: {},
+    arrowStyles: {},
+    attributes: {},
+    flipped: false,
+    offsets: {},
+  };
+
+  // compute reference element offsets
+  data.offsets.reference = getReferenceOffsets(
+    this.state,
+    this.popper,
+    this.reference,
+    this.options.positionFixed
+  );
+
+  // compute auto placement, store placement inside the data object,
+  // modifiers will be able to edit `placement` if needed
+  // and refer to originalPlacement to know the original value
+  data.placement = computeAutoPlacement(
+    this.options.placement,
+    data.offsets.reference,
+    this.popper,
+    this.reference,
+    this.options.modifiers.flip.boundariesElement,
+    this.options.modifiers.flip.padding
+  );
+
+  // store the computed placement inside `originalPlacement`
+  data.originalPlacement = data.placement;
+
+  data.positionFixed = this.options.positionFixed;
+
+  // compute the popper offsets
+  data.offsets.popper = getPopperOffsets(
+    this.popper,
+    data.offsets.reference,
+    data.placement
+  );
+
+  data.offsets.popper.position = this.options.positionFixed
+    ? 'fixed'
+    : 'absolute';
+
+  // run the modifiers
+  data = runModifiers(this.modifiers, data);
+
+  // the first `update` will call `onCreate` callback
+  // the other ones will call `onUpdate` callback
+  if (!this.state.isCreated) {
+    this.state.isCreated = true;
+    this.options.onCreate(data);
+  } else {
+    this.options.onUpdate(data);
+  }
+}

Diagram-Canvas/Scripts/src/modifiers/applyStyle.js

@@ -0,0 +1,73 @@
+import setStyles from '../utils/setStyles';
+import setAttributes from '../utils/setAttributes';
+import getReferenceOffsets from '../utils/getReferenceOffsets';
+import computeAutoPlacement from '../utils/computeAutoPlacement';
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} data.styles - List of style properties - values to apply to popper element
+ * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The same data object
+ */
+export default function applyStyle(data) {
+  // any property present in `data.styles` will be applied to the popper,
+  // in this way we can make the 3rd party modifiers add custom styles to it
+  // Be aware, modifiers could override the properties defined in the previous
+  // lines of this modifier!
+  setStyles(data.instance.popper, data.styles);
+
+  // any property present in `data.attributes` will be applied to the popper,
+  // they will be set as HTML attributes of the element
+  setAttributes(data.instance.popper, data.attributes);
+
+  // if arrowElement is defined and arrowStyles has some properties
+  if (data.arrowElement && Object.keys(data.arrowStyles).length) {
+    setStyles(data.arrowElement, data.arrowStyles);
+  }
+
+  return data;
+}
+
+/**
+ * Set the x-placement attribute before everything else because it could be used
+ * to add margins to the popper margins needs to be calculated to get the
+ * correct popper offsets.
+ * @method
+ * @memberof Popper.modifiers
+ * @param {HTMLElement} reference - The reference element used to position the popper
+ * @param {HTMLElement} popper - The HTML element used as popper
+ * @param {Object} options - Popper.js options
+ */
+export function applyStyleOnLoad(
+  reference,
+  popper,
+  options,
+  modifierOptions,
+  state
+) {
+  // compute reference element offsets
+  const referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);
+
+  // compute auto placement, store placement inside the data object,
+  // modifiers will be able to edit `placement` if needed
+  // and refer to originalPlacement to know the original value
+  const placement = computeAutoPlacement(
+    options.placement,
+    referenceOffsets,
+    popper,
+    reference,
+    options.modifiers.flip.boundariesElement,
+    options.modifiers.flip.padding
+  );
+
+  popper.setAttribute('x-placement', placement);
+
+  // Apply `position` to popper before anything else because
+  // without the position applied we can't guarantee correct computations
+  setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });
+
+  return options;
+}

Diagram-Canvas/Scripts/src/modifiers/arrow.js

@@ -0,0 +1,89 @@
+import getClientRect from '../utils/getClientRect';
+import getOuterSizes from '../utils/getOuterSizes';
+import isModifierRequired from '../utils/isModifierRequired';
+import getStyleComputedProperty from '../utils/getStyleComputedProperty';
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function arrow(data, options) {
+  // arrow depends on keepTogether in order to work
+  if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
+    return data;
+  }
+
+  let arrowElement = options.element;
+
+  // if arrowElement is a string, suppose it's a CSS selector
+  if (typeof arrowElement === 'string') {
+    arrowElement = data.instance.popper.querySelector(arrowElement);
+
+    // if arrowElement is not found, don't run the modifier
+    if (!arrowElement) {
+      return data;
+    }
+  } else {
+    // if the arrowElement isn't a query selector we must check that the
+    // provided DOM node is child of its popper node
+    if (!data.instance.popper.contains(arrowElement)) {
+      console.warn(
+        'WARNING: `arrow.element` must be child of its popper element!'
+      );
+      return data;
+    }
+  }
+
+  const placement = data.placement.split('-')[0];
+  const { popper, reference } = data.offsets;
+  const isVertical = ['left', 'right'].indexOf(placement) !== -1;
+
+  const len = isVertical ? 'height' : 'width';
+  const sideCapitalized = isVertical ? 'Top' : 'Left';
+  const side = sideCapitalized.toLowerCase();
+  const altSide = isVertical ? 'left' : 'top';
+  const opSide = isVertical ? 'bottom' : 'right';
+  const arrowElementSize = getOuterSizes(arrowElement)[len];
+
+  //
+  // extends keepTogether behavior making sure the popper and its
+  // reference have enough pixels in conjunction
+  //
+
+  // top/left side
+  if (reference[opSide] - arrowElementSize < popper[side]) {
+    data.offsets.popper[side] -=
+      popper[side] - (reference[opSide] - arrowElementSize);
+  }
+  // bottom/right side
+  if (reference[side] + arrowElementSize > popper[opSide]) {
+    data.offsets.popper[side] +=
+      reference[side] + arrowElementSize - popper[opSide];
+  }
+  data.offsets.popper = getClientRect(data.offsets.popper);
+
+  // compute center of the popper
+  const center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
+
+  // Compute the sideValue using the updated popper offsets
+  // take popper margin in account because we don't have this info available
+  const css = getStyleComputedProperty(data.instance.popper);
+  const popperMarginSide = parseFloat(css[`margin${sideCapitalized}`]);
+  const popperBorderSide = parseFloat(css[`border${sideCapitalized}Width`]);
+  let sideValue =
+    center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
+
+  // prevent arrowElement from being placed not contiguously to its popper
+  sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
+
+  data.arrowElement = arrowElement;
+  data.offsets.arrow = {
+    [side]: Math.round(sideValue),
+    [altSide]: '', // make sure to unset any eventual altSide value from the DOM node
+  };
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/computeStyle.js

@@ -0,0 +1,112 @@
+import getSupportedPropertyName from '../utils/getSupportedPropertyName';
+import find from '../utils/find';
+import getOffsetParent from '../utils/getOffsetParent';
+import getBoundingClientRect from '../utils/getBoundingClientRect';
+import getRoundedOffsets from '../utils/getRoundedOffsets';
+import isBrowser from '../utils/isBrowser';
+
+const isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function computeStyle(data, options) {
+  const { x, y } = options;
+  const { popper } = data.offsets;
+
+  // Remove this legacy support in Popper.js v2
+  const legacyGpuAccelerationOption = find(
+    data.instance.modifiers,
+    modifier => modifier.name === 'applyStyle'
+  ).gpuAcceleration;
+  if (legacyGpuAccelerationOption !== undefined) {
+    console.warn(
+      'WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!'
+    );
+  }
+  const gpuAcceleration =
+    legacyGpuAccelerationOption !== undefined
+      ? legacyGpuAccelerationOption
+      : options.gpuAcceleration;
+
+  const offsetParent = getOffsetParent(data.instance.popper);
+  const offsetParentRect = getBoundingClientRect(offsetParent);
+
+  // Styles
+  const styles = {
+    position: popper.position,
+  };
+
+  const offsets = getRoundedOffsets(
+    data,
+    window.devicePixelRatio < 2 || !isFirefox
+  );
+
+  const sideA = x === 'bottom' ? 'top' : 'bottom';
+  const sideB = y === 'right' ? 'left' : 'right';
+
+  // if gpuAcceleration is set to `true` and transform is supported,
+  //  we use `translate3d` to apply the position to the popper we
+  // automatically use the supported prefixed version if needed
+  const prefixedProperty = getSupportedPropertyName('transform');
+
+  // now, let's make a step back and look at this code closely (wtf?)
+  // If the content of the popper grows once it's been positioned, it
+  // may happen that the popper gets misplaced because of the new content
+  // overflowing its reference element
+  // To avoid this problem, we provide two options (x and y), which allow
+  // the consumer to define the offset origin.
+  // If we position a popper on top of a reference element, we can set
+  // `x` to `top` to make the popper grow towards its top instead of
+  // its bottom.
+  let left, top;
+  if (sideA === 'bottom') {
+    // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)
+    // and not the bottom of the html element
+    if (offsetParent.nodeName === 'HTML') {
+      top = -offsetParent.clientHeight + offsets.bottom;
+    } else {
+      top = -offsetParentRect.height + offsets.bottom;
+    }
+  } else {
+    top = offsets.top;
+  }
+  if (sideB === 'right') {
+    if (offsetParent.nodeName === 'HTML') {
+      left = -offsetParent.clientWidth + offsets.right;
+    } else {
+      left = -offsetParentRect.width + offsets.right;
+    }
+  } else {
+    left = offsets.left;
+  }
+  if (gpuAcceleration && prefixedProperty) {
+    styles[prefixedProperty] = `translate3d(${left}px, ${top}px, 0)`;
+    styles[sideA] = 0;
+    styles[sideB] = 0;
+    styles.willChange = 'transform';
+  } else {
+    // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
+    const invertTop = sideA === 'bottom' ? -1 : 1;
+    const invertLeft = sideB === 'right' ? -1 : 1;
+    styles[sideA] = top * invertTop;
+    styles[sideB] = left * invertLeft;
+    styles.willChange = `${sideA}, ${sideB}`;
+  }
+
+  // Attributes
+  const attributes = {
+    'x-placement': data.placement,
+  };
+
+  // Update `data` attributes, styles and arrowStyles
+  data.attributes = { ...attributes, ...data.attributes };
+  data.styles = { ...styles, ...data.styles };
+  data.arrowStyles = { ...data.offsets.arrow, ...data.arrowStyles };
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/flip.js

@@ -0,0 +1,146 @@
+import getOppositePlacement from '../utils/getOppositePlacement';
+import getOppositeVariation from '../utils/getOppositeVariation';
+import getPopperOffsets from '../utils/getPopperOffsets';
+import runModifiers from '../utils/runModifiers';
+import getBoundaries from '../utils/getBoundaries';
+import isModifierEnabled from '../utils/isModifierEnabled';
+import clockwise from '../utils/clockwise';
+
+const BEHAVIORS = {
+  FLIP: 'flip',
+  CLOCKWISE: 'clockwise',
+  COUNTERCLOCKWISE: 'counterclockwise',
+};
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function flip(data, options) {
+  // if `inner` modifier is enabled, we can't use the `flip` modifier
+  if (isModifierEnabled(data.instance.modifiers, 'inner')) {
+    return data;
+  }
+
+  if (data.flipped && data.placement === data.originalPlacement) {
+    // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
+    return data;
+  }
+
+  const boundaries = getBoundaries(
+    data.instance.popper,
+    data.instance.reference,
+    options.padding,
+    options.boundariesElement,
+    data.positionFixed
+  );
+
+  let placement = data.placement.split('-')[0];
+  let placementOpposite = getOppositePlacement(placement);
+  let variation = data.placement.split('-')[1] || '';
+
+  let flipOrder = [];
+
+  switch (options.behavior) {
+    case BEHAVIORS.FLIP:
+      flipOrder = [placement, placementOpposite];
+      break;
+    case BEHAVIORS.CLOCKWISE:
+      flipOrder = clockwise(placement);
+      break;
+    case BEHAVIORS.COUNTERCLOCKWISE:
+      flipOrder = clockwise(placement, true);
+      break;
+    default:
+      flipOrder = options.behavior;
+  }
+
+  flipOrder.forEach((step, index) => {
+    if (placement !== step || flipOrder.length === index + 1) {
+      return data;
+    }
+
+    placement = data.placement.split('-')[0];
+    placementOpposite = getOppositePlacement(placement);
+
+    const popperOffsets = data.offsets.popper;
+    const refOffsets = data.offsets.reference;
+
+    // using floor because the reference offsets may contain decimals we are not going to consider here
+    const floor = Math.floor;
+    const overlapsRef =
+      (placement === 'left' &&
+        floor(popperOffsets.right) > floor(refOffsets.left)) ||
+      (placement === 'right' &&
+        floor(popperOffsets.left) < floor(refOffsets.right)) ||
+      (placement === 'top' &&
+        floor(popperOffsets.bottom) > floor(refOffsets.top)) ||
+      (placement === 'bottom' &&
+        floor(popperOffsets.top) < floor(refOffsets.bottom));
+
+    const overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
+    const overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
+    const overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
+    const overflowsBottom =
+      floor(popperOffsets.bottom) > floor(boundaries.bottom);
+
+    const overflowsBoundaries =
+      (placement === 'left' && overflowsLeft) ||
+      (placement === 'right' && overflowsRight) ||
+      (placement === 'top' && overflowsTop) ||
+      (placement === 'bottom' && overflowsBottom);
+
+    // flip the variation if required
+    const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
+
+    // flips variation if reference element overflows boundaries
+    const flippedVariationByRef =
+      !!options.flipVariations &&
+      ((isVertical && variation === 'start' && overflowsLeft) ||
+        (isVertical && variation === 'end' && overflowsRight) ||
+        (!isVertical && variation === 'start' && overflowsTop) ||
+        (!isVertical && variation === 'end' && overflowsBottom));
+
+    // flips variation if popper content overflows boundaries
+    const flippedVariationByContent =
+      !!options.flipVariationsByContent &&
+      ((isVertical && variation === 'start' && overflowsRight) ||
+        (isVertical && variation === 'end' && overflowsLeft) ||
+        (!isVertical && variation === 'start' && overflowsBottom) ||
+        (!isVertical && variation === 'end' && overflowsTop));
+
+    const flippedVariation = flippedVariationByRef || flippedVariationByContent;
+
+    if (overlapsRef || overflowsBoundaries || flippedVariation) {
+      // this boolean to detect any flip loop
+      data.flipped = true;
+
+      if (overlapsRef || overflowsBoundaries) {
+        placement = flipOrder[index + 1];
+      }
+
+      if (flippedVariation) {
+        variation = getOppositeVariation(variation);
+      }
+
+      data.placement = placement + (variation ? '-' + variation : '');
+
+      // this object contains `position`, we want to preserve it along with
+      // any additional property we may add in the future
+      data.offsets.popper = {
+        ...data.offsets.popper,
+        ...getPopperOffsets(
+          data.instance.popper,
+          data.offsets.reference,
+          data.placement
+        ),
+      };
+
+      data = runModifiers(data.instance.modifiers, data, 'flip');
+    }
+  });
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/hide.js

@@ -0,0 +1,46 @@
+import isModifierRequired from '../utils/isModifierRequired';
+import find from '../utils/find';
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function hide(data) {
+  if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
+    return data;
+  }
+
+  const refRect = data.offsets.reference;
+  const bound = find(
+    data.instance.modifiers,
+    modifier => modifier.name === 'preventOverflow'
+  ).boundaries;
+
+  if (
+    refRect.bottom < bound.top ||
+    refRect.left > bound.right ||
+    refRect.top > bound.bottom ||
+    refRect.right < bound.left
+  ) {
+    // Avoid unnecessary DOM access if visibility hasn't changed
+    if (data.hide === true) {
+      return data;
+    }
+
+    data.hide = true;
+    data.attributes['x-out-of-boundaries'] = '';
+  } else {
+    // Avoid unnecessary DOM access if visibility hasn't changed
+    if (data.hide === false) {
+      return data;
+    }
+
+    data.hide = false;
+    data.attributes['x-out-of-boundaries'] = false;
+  }
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/index.js

@@ -0,0 +1,369 @@
+import applyStyle, { applyStyleOnLoad } from './applyStyle';
+import computeStyle from './computeStyle';
+import arrow from './arrow';
+import flip from './flip';
+import keepTogether from './keepTogether';
+import offset from './offset';
+import preventOverflow from './preventOverflow';
+import shift from './shift';
+import hide from './hide';
+import inner from './inner';
+
+/**
+ * Modifier function, each modifier can have a function of this type assigned
+ * to its `fn` property.<br />
+ * These functions will be called on each update, this means that you must
+ * make sure they are performant enough to avoid performance bottlenecks.
+ *
+ * @function ModifierFn
+ * @argument {dataObject} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {dataObject} The data object, properly modified
+ */
+
+/**
+ * Modifiers are plugins used to alter the behavior of your poppers.<br />
+ * Popper.js uses a set of 9 modifiers to provide all the basic functionalities
+ * needed by the library.
+ *
+ * Usually you don't want to override the `order`, `fn` and `onLoad` props.
+ * All the other properties are configurations that could be tweaked.
+ * @namespace modifiers
+ */
+export default {
+  /**
+   * Modifier used to shift the popper on the start or end of its reference
+   * element.<br />
+   * It will read the variation of the `placement` property.<br />
+   * It can be one either `-end` or `-start`.
+   * @memberof modifiers
+   * @inner
+   */
+  shift: {
+    /** @prop {number} order=100 - Index used to define the order of execution */
+    order: 100,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: shift,
+  },
+
+  /**
+   * The `offset` modifier can shift your popper on both its axis.
+   *
+   * It accepts the following units:
+   * - `px` or unit-less, interpreted as pixels
+   * - `%` or `%r`, percentage relative to the length of the reference element
+   * - `%p`, percentage relative to the length of the popper element
+   * - `vw`, CSS viewport width unit
+   * - `vh`, CSS viewport height unit
+   *
+   * For length is intended the main axis relative to the placement of the popper.<br />
+   * This means that if the placement is `top` or `bottom`, the length will be the
+   * `width`. In case of `left` or `right`, it will be the `height`.
+   *
+   * You can provide a single value (as `Number` or `String`), or a pair of values
+   * as `String` divided by a comma or one (or more) white spaces.<br />
+   * The latter is a deprecated method because it leads to confusion and will be
+   * removed in v2.<br />
+   * Additionally, it accepts additions and subtractions between different units.
+   * Note that multiplications and divisions aren't supported.
+   *
+   * Valid examples are:
+   * ```
+   * 10
+   * '10%'
+   * '10, 10'
+   * '10%, 10'
+   * '10 + 10%'
+   * '10 - 5vh + 3%'
+   * '-10px + 5vh, 5px - 6%'
+   * ```
+   * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
+   * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
+   * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).
+   *
+   * @memberof modifiers
+   * @inner
+   */
+  offset: {
+    /** @prop {number} order=200 - Index used to define the order of execution */
+    order: 200,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: offset,
+    /** @prop {Number|String} offset=0
+     * The offset value as described in the modifier description
+     */
+    offset: 0,
+  },
+
+  /**
+   * Modifier used to prevent the popper from being positioned outside the boundary.
+   *
+   * A scenario exists where the reference itself is not within the boundaries.<br />
+   * We can say it has "escaped the boundaries" — or just "escaped".<br />
+   * In this case we need to decide whether the popper should either:
+   *
+   * - detach from the reference and remain "trapped" in the boundaries, or
+   * - if it should ignore the boundary and "escape with its reference"
+   *
+   * When `escapeWithReference` is set to`true` and reference is completely
+   * outside its boundaries, the popper will overflow (or completely leave)
+   * the boundaries in order to remain attached to the edge of the reference.
+   *
+   * @memberof modifiers
+   * @inner
+   */
+  preventOverflow: {
+    /** @prop {number} order=300 - Index used to define the order of execution */
+    order: 300,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: preventOverflow,
+    /**
+     * @prop {Array} [priority=['left','right','top','bottom']]
+     * Popper will try to prevent overflow following these priorities by default,
+     * then, it could overflow on the left and on top of the `boundariesElement`
+     */
+    priority: ['left', 'right', 'top', 'bottom'],
+    /**
+     * @prop {number} padding=5
+     * Amount of pixel used to define a minimum distance between the boundaries
+     * and the popper. This makes sure the popper always has a little padding
+     * between the edges of its container
+     */
+    padding: 5,
+    /**
+     * @prop {String|HTMLElement} boundariesElement='scrollParent'
+     * Boundaries used by the modifier. Can be `scrollParent`, `window`,
+     * `viewport` or any DOM element.
+     */
+    boundariesElement: 'scrollParent',
+  },
+
+  /**
+   * Modifier used to make sure the reference and its popper stay near each other
+   * without leaving any gap between the two. Especially useful when the arrow is
+   * enabled and you want to ensure that it points to its reference element.
+   * It cares only about the first axis. You can still have poppers with margin
+   * between the popper and its reference element.
+   * @memberof modifiers
+   * @inner
+   */
+  keepTogether: {
+    /** @prop {number} order=400 - Index used to define the order of execution */
+    order: 400,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: keepTogether,
+  },
+
+  /**
+   * This modifier is used to move the `arrowElement` of the popper to make
+   * sure it is positioned between the reference element and its popper element.
+   * It will read the outer size of the `arrowElement` node to detect how many
+   * pixels of conjunction are needed.
+   *
+   * It has no effect if no `arrowElement` is provided.
+   * @memberof modifiers
+   * @inner
+   */
+  arrow: {
+    /** @prop {number} order=500 - Index used to define the order of execution */
+    order: 500,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: arrow,
+    /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
+    element: '[x-arrow]',
+  },
+
+  /**
+   * Modifier used to flip the popper's placement when it starts to overlap its
+   * reference element.
+   *
+   * Requires the `preventOverflow` modifier before it in order to work.
+   *
+   * **NOTE:** this modifier will interrupt the current update cycle and will
+   * restart it if it detects the need to flip the placement.
+   * @memberof modifiers
+   * @inner
+   */
+  flip: {
+    /** @prop {number} order=600 - Index used to define the order of execution */
+    order: 600,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: flip,
+    /**
+     * @prop {String|Array} behavior='flip'
+     * The behavior used to change the popper's placement. It can be one of
+     * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
+     * placements (with optional variations)
+     */
+    behavior: 'flip',
+    /**
+     * @prop {number} padding=5
+     * The popper will flip if it hits the edges of the `boundariesElement`
+     */
+    padding: 5,
+    /**
+     * @prop {String|HTMLElement} boundariesElement='viewport'
+     * The element which will define the boundaries of the popper position.
+     * The popper will never be placed outside of the defined boundaries
+     * (except if `keepTogether` is enabled)
+     */
+    boundariesElement: 'viewport',
+    /**
+     * @prop {Boolean} flipVariations=false
+     * The popper will switch placement variation between `-start` and `-end` when
+     * the reference element overlaps its boundaries.
+     *
+     * The original placement should have a set variation.
+     */
+    flipVariations: false,
+    /**
+     * @prop {Boolean} flipVariationsByContent=false
+     * The popper will switch placement variation between `-start` and `-end` when
+     * the popper element overlaps its reference boundaries.
+     *
+     * The original placement should have a set variation.
+     */
+    flipVariationsByContent: false,
+  },
+
+  /**
+   * Modifier used to make the popper flow toward the inner of the reference element.
+   * By default, when this modifier is disabled, the popper will be placed outside
+   * the reference element.
+   * @memberof modifiers
+   * @inner
+   */
+  inner: {
+    /** @prop {number} order=700 - Index used to define the order of execution */
+    order: 700,
+    /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
+    enabled: false,
+    /** @prop {ModifierFn} */
+    fn: inner,
+  },
+
+  /**
+   * Modifier used to hide the popper when its reference element is outside of the
+   * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
+   * be used to hide with a CSS selector the popper when its reference is
+   * out of boundaries.
+   *
+   * Requires the `preventOverflow` modifier before it in order to work.
+   * @memberof modifiers
+   * @inner
+   */
+  hide: {
+    /** @prop {number} order=800 - Index used to define the order of execution */
+    order: 800,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: hide,
+  },
+
+  /**
+   * Computes the style that will be applied to the popper element to gets
+   * properly positioned.
+   *
+   * Note that this modifier will not touch the DOM, it just prepares the styles
+   * so that `applyStyle` modifier can apply it. This separation is useful
+   * in case you need to replace `applyStyle` with a custom implementation.
+   *
+   * This modifier has `850` as `order` value to maintain backward compatibility
+   * with previous versions of Popper.js. Expect the modifiers ordering method
+   * to change in future major versions of the library.
+   *
+   * @memberof modifiers
+   * @inner
+   */
+  computeStyle: {
+    /** @prop {number} order=850 - Index used to define the order of execution */
+    order: 850,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: computeStyle,
+    /**
+     * @prop {Boolean} gpuAcceleration=true
+     * If true, it uses the CSS 3D transformation to position the popper.
+     * Otherwise, it will use the `top` and `left` properties
+     */
+    gpuAcceleration: true,
+    /**
+     * @prop {string} [x='bottom']
+     * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
+     * Change this if your popper should grow in a direction different from `bottom`
+     */
+    x: 'bottom',
+    /**
+     * @prop {string} [x='left']
+     * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
+     * Change this if your popper should grow in a direction different from `right`
+     */
+    y: 'right',
+  },
+
+  /**
+   * Applies the computed styles to the popper element.
+   *
+   * All the DOM manipulations are limited to this modifier. This is useful in case
+   * you want to integrate Popper.js inside a framework or view library and you
+   * want to delegate all the DOM manipulations to it.
+   *
+   * Note that if you disable this modifier, you must make sure the popper element
+   * has its position set to `absolute` before Popper.js can do its work!
+   *
+   * Just disable this modifier and define your own to achieve the desired effect.
+   *
+   * @memberof modifiers
+   * @inner
+   */
+  applyStyle: {
+    /** @prop {number} order=900 - Index used to define the order of execution */
+    order: 900,
+    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+    enabled: true,
+    /** @prop {ModifierFn} */
+    fn: applyStyle,
+    /** @prop {Function} */
+    onLoad: applyStyleOnLoad,
+    /**
+     * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
+     * @prop {Boolean} gpuAcceleration=true
+     * If true, it uses the CSS 3D transformation to position the popper.
+     * Otherwise, it will use the `top` and `left` properties
+     */
+    gpuAcceleration: undefined,
+  },
+};
+
+/**
+ * The `dataObject` is an object containing all the information used by Popper.js.
+ * This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
+ * @name dataObject
+ * @property {Object} data.instance The Popper.js instance
+ * @property {String} data.placement Placement applied to popper
+ * @property {String} data.originalPlacement Placement originally defined on init
+ * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
+ * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper
+ * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
+ * @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)
+ * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)
+ * @property {Object} data.boundaries Offsets of the popper boundaries
+ * @property {Object} data.offsets The measurements of popper, reference and arrow elements
+ * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
+ * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
+ * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
+ */

Diagram-Canvas/Scripts/src/modifiers/inner.js

@@ -0,0 +1,27 @@
+import getClientRect from '../utils/getClientRect';
+import getOppositePlacement from '../utils/getOppositePlacement';
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function inner(data) {
+  const placement = data.placement;
+  const basePlacement = placement.split('-')[0];
+  const { popper, reference } = data.offsets;
+  const isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
+
+  const subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
+
+  popper[isHoriz ? 'left' : 'top'] =
+    reference[basePlacement] -
+    (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
+
+  data.placement = getOppositePlacement(placement);
+  data.offsets.popper = getClientRect(popper);
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/keepTogether.js

@@ -0,0 +1,26 @@
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function keepTogether(data) {
+  const { popper, reference } = data.offsets;
+  const placement = data.placement.split('-')[0];
+  const floor = Math.floor;
+  const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
+  const side = isVertical ? 'right' : 'bottom';
+  const opSide = isVertical ? 'left' : 'top';
+  const measurement = isVertical ? 'width' : 'height';
+
+  if (popper[side] < floor(reference[opSide])) {
+    data.offsets.popper[opSide] =
+      floor(reference[opSide]) - popper[measurement];
+  }
+  if (popper[opSide] > floor(reference[side])) {
+    data.offsets.popper[opSide] = floor(reference[side]);
+  }
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/offset.js

@@ -0,0 +1,194 @@
+import isNumeric from '../utils/isNumeric';
+import getClientRect from '../utils/getClientRect';
+import find from '../utils/find';
+
+/**
+ * Converts a string containing value + unit into a px value number
+ * @function
+ * @memberof {modifiers~offset}
+ * @private
+ * @argument {String} str - Value + unit string
+ * @argument {String} measurement - `height` or `width`
+ * @argument {Object} popperOffsets
+ * @argument {Object} referenceOffsets
+ * @returns {Number|String}
+ * Value in pixels, or original string if no values were extracted
+ */
+export function toValue(str, measurement, popperOffsets, referenceOffsets) {
+  // separate value from unit
+  const split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
+  const value = +split[1];
+  const unit = split[2];
+
+  // If it's not a number it's an operator, I guess
+  if (!value) {
+    return str;
+  }
+
+  if (unit.indexOf('%') === 0) {
+    let element;
+    switch (unit) {
+      case '%p':
+        element = popperOffsets;
+        break;
+      case '%':
+      case '%r':
+      default:
+        element = referenceOffsets;
+    }
+
+    const rect = getClientRect(element);
+    return rect[measurement] / 100 * value;
+  } else if (unit === 'vh' || unit === 'vw') {
+    // if is a vh or vw, we calculate the size based on the viewport
+    let size;
+    if (unit === 'vh') {
+      size = Math.max(
+        document.documentElement.clientHeight,
+        window.innerHeight || 0
+      );
+    } else {
+      size = Math.max(
+        document.documentElement.clientWidth,
+        window.innerWidth || 0
+      );
+    }
+    return size / 100 * value;
+  } else {
+    // if is an explicit pixel unit, we get rid of the unit and keep the value
+    // if is an implicit unit, it's px, and we return just the value
+    return value;
+  }
+}
+
+/**
+ * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
+ * @function
+ * @memberof {modifiers~offset}
+ * @private
+ * @argument {String} offset
+ * @argument {Object} popperOffsets
+ * @argument {Object} referenceOffsets
+ * @argument {String} basePlacement
+ * @returns {Array} a two cells array with x and y offsets in numbers
+ */
+export function parseOffset(
+  offset,
+  popperOffsets,
+  referenceOffsets,
+  basePlacement
+) {
+  const offsets = [0, 0];
+
+  // Use height if placement is left or right and index is 0 otherwise use width
+  // in this way the first offset will use an axis and the second one
+  // will use the other one
+  const useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
+
+  // Split the offset string to obtain a list of values and operands
+  // The regex addresses values with the plus or minus sign in front (+10, -20, etc)
+  const fragments = offset.split(/(\+|\-)/).map(frag => frag.trim());
+
+  // Detect if the offset string contains a pair of values or a single one
+  // they could be separated by comma or space
+  const divider = fragments.indexOf(
+    find(fragments, frag => frag.search(/,|\s/) !== -1)
+  );
+
+  if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
+    console.warn(
+      'Offsets separated by white space(s) are deprecated, use a comma (,) instead.'
+    );
+  }
+
+  // If divider is found, we divide the list of values and operands to divide
+  // them by ofset X and Y.
+  const splitRegex = /\s*,\s*|\s+/;
+  let ops = divider !== -1
+    ? [
+        fragments
+          .slice(0, divider)
+          .concat([fragments[divider].split(splitRegex)[0]]),
+        [fragments[divider].split(splitRegex)[1]].concat(
+          fragments.slice(divider + 1)
+        ),
+      ]
+    : [fragments];
+
+  // Convert the values with units to absolute pixels to allow our computations
+  ops = ops.map((op, index) => {
+    // Most of the units rely on the orientation of the popper
+    const measurement = (index === 1 ? !useHeight : useHeight)
+      ? 'height'
+      : 'width';
+    let mergeWithPrevious = false;
+    return (
+      op
+        // This aggregates any `+` or `-` sign that aren't considered operators
+        // e.g.: 10 + +5 => [10, +, +5]
+        .reduce((a, b) => {
+          if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
+            a[a.length - 1] = b;
+            mergeWithPrevious = true;
+            return a;
+          } else if (mergeWithPrevious) {
+            a[a.length - 1] += b;
+            mergeWithPrevious = false;
+            return a;
+          } else {
+            return a.concat(b);
+          }
+        }, [])
+        // Here we convert the string values into number values (in px)
+        .map(str => toValue(str, measurement, popperOffsets, referenceOffsets))
+    );
+  });
+
+  // Loop trough the offsets arrays and execute the operations
+  ops.forEach((op, index) => {
+    op.forEach((frag, index2) => {
+      if (isNumeric(frag)) {
+        offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
+      }
+    });
+  });
+  return offsets;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @argument {Number|String} options.offset=0
+ * The offset value as described in the modifier description
+ * @returns {Object} The data object, properly modified
+ */
+export default function offset(data, { offset }) {
+  const { placement, offsets: { popper, reference } } = data;
+  const basePlacement = placement.split('-')[0];
+
+  let offsets;
+  if (isNumeric(+offset)) {
+    offsets = [+offset, 0];
+  } else {
+    offsets = parseOffset(offset, popper, reference, basePlacement);
+  }
+
+  if (basePlacement === 'left') {
+    popper.top += offsets[0];
+    popper.left -= offsets[1];
+  } else if (basePlacement === 'right') {
+    popper.top += offsets[0];
+    popper.left += offsets[1];
+  } else if (basePlacement === 'top') {
+    popper.left += offsets[0];
+    popper.top -= offsets[1];
+  } else if (basePlacement === 'bottom') {
+    popper.left += offsets[0];
+    popper.top += offsets[1];
+  }
+
+  data.popper = popper;
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/preventOverflow.js

@@ -0,0 +1,89 @@
+import getOffsetParent from '../utils/getOffsetParent';
+import getBoundaries from '../utils/getBoundaries';
+import getSupportedPropertyName from '../utils/getSupportedPropertyName';
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function preventOverflow(data, options) {
+  let boundariesElement =
+    options.boundariesElement || getOffsetParent(data.instance.popper);
+
+  // If offsetParent is the reference element, we really want to
+  // go one step up and use the next offsetParent as reference to
+  // avoid to make this modifier completely useless and look like broken
+  if (data.instance.reference === boundariesElement) {
+    boundariesElement = getOffsetParent(boundariesElement);
+  }
+
+  // NOTE: DOM access here
+  // resets the popper's position so that the document size can be calculated excluding
+  // the size of the popper element itself
+  const transformProp = getSupportedPropertyName('transform');
+  const popperStyles = data.instance.popper.style; // assignment to help minification
+  const { top, left, [transformProp]: transform } = popperStyles;
+  popperStyles.top = '';
+  popperStyles.left = '';
+  popperStyles[transformProp] = '';
+
+  const boundaries = getBoundaries(
+    data.instance.popper,
+    data.instance.reference,
+    options.padding,
+    boundariesElement,
+    data.positionFixed
+  );
+
+  // NOTE: DOM access here
+  // restores the original style properties after the offsets have been computed
+  popperStyles.top = top;
+  popperStyles.left = left;
+  popperStyles[transformProp] = transform;
+
+  options.boundaries = boundaries;
+
+  const order = options.priority;
+  let popper = data.offsets.popper;
+
+  const check = {
+    primary(placement) {
+      let value = popper[placement];
+      if (
+        popper[placement] < boundaries[placement] &&
+        !options.escapeWithReference
+      ) {
+        value = Math.max(popper[placement], boundaries[placement]);
+      }
+      return { [placement]: value };
+    },
+    secondary(placement) {
+      const mainSide = placement === 'right' ? 'left' : 'top';
+      let value = popper[mainSide];
+      if (
+        popper[placement] > boundaries[placement] &&
+        !options.escapeWithReference
+      ) {
+        value = Math.min(
+          popper[mainSide],
+          boundaries[placement] -
+            (placement === 'right' ? popper.width : popper.height)
+        );
+      }
+      return { [mainSide]: value };
+    },
+  };
+
+  order.forEach(placement => {
+    const side =
+      ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
+    popper = { ...popper, ...check[side](placement) };
+  });
+
+  data.offsets.popper = popper;
+
+  return data;
+}

Diagram-Canvas/Scripts/src/modifiers/shift.js

@@ -0,0 +1,31 @@
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function shift(data) {
+  const placement = data.placement;
+  const basePlacement = placement.split('-')[0];
+  const shiftvariation = placement.split('-')[1];
+
+  // if shift shiftvariation is specified, run the modifier
+  if (shiftvariation) {
+    const { reference, popper } = data.offsets;
+    const isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
+    const side = isVertical ? 'left' : 'top';
+    const measurement = isVertical ? 'width' : 'height';
+
+    const shiftOffsets = {
+      start: { [side]: reference[side] },
+      end: {
+        [side]: reference[side] + reference[measurement] - popper[measurement],
+      },
+    };
+
+    data.offsets.popper = { ...popper, ...shiftOffsets[shiftvariation] };
+  }
+
+  return data;
+}

Diagram-Canvas/Scripts/src/utils/clockwise.js

@@ -0,0 +1,22 @@
+import placements from '../methods/placements';
+
+// Get rid of `auto` `auto-start` and `auto-end`
+const validPlacements = placements.slice(3);
+
+/**
+ * Given an initial placement, returns all the subsequent placements
+ * clockwise (or counter-clockwise).
+ *
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement - A valid placement (it accepts variations)
+ * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
+ * @returns {Array} placements including their variations
+ */
+export default function clockwise(placement, counter = false) {
+  const index = validPlacements.indexOf(placement);
+  const arr = validPlacements
+    .slice(index + 1)
+    .concat(validPlacements.slice(0, index));
+  return counter ? arr.reverse() : arr;
+}

Diagram-Canvas/Scripts/src/utils/computeAutoPlacement.js

@@ -0,0 +1,74 @@
+import getBoundaries from '../utils/getBoundaries';
+
+function getArea({ width, height }) {
+  return width * height;
+}
+
+/**
+ * Utility used to transform the `auto` placement to the placement with more
+ * available space.
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+export default function computeAutoPlacement(
+  placement,
+  refRect,
+  popper,
+  reference,
+  boundariesElement,
+  padding = 0
+) {
+  if (placement.indexOf('auto') === -1) {
+    return placement;
+  }
+
+  const boundaries = getBoundaries(
+    popper,
+    reference,
+    padding,
+    boundariesElement
+  );
+
+  const rects = {
+    top: {
+      width: boundaries.width,
+      height: refRect.top - boundaries.top,
+    },
+    right: {
+      width: boundaries.right - refRect.right,
+      height: boundaries.height,
+    },
+    bottom: {
+      width: boundaries.width,
+      height: boundaries.bottom - refRect.bottom,
+    },
+    left: {
+      width: refRect.left - boundaries.left,
+      height: boundaries.height,
+    },
+  };
+
+  const sortedAreas = Object.keys(rects)
+    .map(key => ({
+      key,
+      ...rects[key],
+      area: getArea(rects[key]),
+    }))
+    .sort((a, b) => b.area - a.area);
+
+  const filteredAreas = sortedAreas.filter(
+    ({ width, height }) =>
+      width >= popper.clientWidth && height >= popper.clientHeight
+  );
+
+  const computedPlacement = filteredAreas.length > 0
+    ? filteredAreas[0].key
+    : sortedAreas[0].key;
+
+  const variation = placement.split('-')[1];
+
+  return computedPlacement + (variation ? `-${variation}` : '');
+}

Diagram-Canvas/Scripts/src/utils/debounce.js

@@ -0,0 +1,54 @@
+import isBrowser from './isBrowser';
+
+const timeoutDuration = (function(){
+  const longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
+  for (let i = 0; i < longerTimeoutBrowsers.length; i += 1) {
+    if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
+      return 1;
+    }
+  }
+  return 0;
+}());
+
+export function microtaskDebounce(fn) {
+  let called = false
+  return () => {
+    if (called) {
+      return
+    }
+    called = true
+    window.Promise.resolve().then(() => {
+      called = false
+      fn()
+    })
+  }
+}
+
+export function taskDebounce(fn) {
+  let scheduled = false;
+  return () => {
+    if (!scheduled) {
+      scheduled = true;
+      setTimeout(() => {
+        scheduled = false;
+        fn();
+      }, timeoutDuration);
+    }
+  };
+}
+
+const supportsMicroTasks = isBrowser && window.Promise
+
+
+/**
+* Create a debounced version of a method, that's asynchronously deferred
+* but called in the minimum time possible.
+*
+* @method
+* @memberof Popper.Utils
+* @argument {Function} fn
+* @returns {Function}
+*/
+export default (supportsMicroTasks
+  ? microtaskDebounce
+  : taskDebounce);

Diagram-Canvas/Scripts/src/utils/find.js

@@ -0,0 +1,18 @@
+/**
+ * Mimics the `find` method of Array
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Array} arr
+ * @argument prop
+ * @argument value
+ * @returns index or -1
+ */
+export default function find(arr, check) {
+  // use native find if supported
+  if (Array.prototype.find) {
+    return arr.find(check);
+  }
+
+  // use `filter` to obtain the same behavior of `find`
+  return arr.filter(check)[0];
+}

Diagram-Canvas/Scripts/src/utils/findCommonOffsetParent.js

@@ -0,0 +1,52 @@
+import isOffsetContainer from './isOffsetContainer';
+import getRoot from './getRoot';
+import getOffsetParent from './getOffsetParent';
+
+/**
+ * Finds the offset parent common to the two provided nodes
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element1
+ * @argument {Element} element2
+ * @returns {Element} common offset parent
+ */
+export default function findCommonOffsetParent(element1, element2) {
+  // This check is needed to avoid errors in case one of the elements isn't defined for any reason
+  if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
+    return document.documentElement;
+  }
+
+  // Here we make sure to give as "start" the element that comes first in the DOM
+  const order =
+    element1.compareDocumentPosition(element2) &
+    Node.DOCUMENT_POSITION_FOLLOWING;
+  const start = order ? element1 : element2;
+  const end = order ? element2 : element1;
+
+  // Get common ancestor container
+  const range = document.createRange();
+  range.setStart(start, 0);
+  range.setEnd(end, 0);
+  const { commonAncestorContainer } = range;
+
+  // Both nodes are inside #document
+  if (
+    (element1 !== commonAncestorContainer &&
+      element2 !== commonAncestorContainer) ||
+    start.contains(end)
+  ) {
+    if (isOffsetContainer(commonAncestorContainer)) {
+      return commonAncestorContainer;
+    }
+
+    return getOffsetParent(commonAncestorContainer);
+  }
+
+  // one of the nodes is inside shadowDOM, find which one
+  const element1root = getRoot(element1);
+  if (element1root.host) {
+    return findCommonOffsetParent(element1root.host, element2);
+  } else {
+    return findCommonOffsetParent(element1, getRoot(element2).host);
+  }
+}

Diagram-Canvas/Scripts/src/utils/findIndex.js

@@ -0,0 +1,21 @@
+import find from './find';
+
+/**
+ * Return the index of the matching object
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Array} arr
+ * @argument prop
+ * @argument value
+ * @returns index or -1
+ */
+export default function findIndex(arr, prop, value) {
+  // use native findIndex if supported
+  if (Array.prototype.findIndex) {
+    return arr.findIndex(cur => cur[prop] === value);
+  }
+
+  // use `find` + `indexOf` if `findIndex` isn't supported
+  const match = find(arr, obj => obj[prop] === value);
+  return arr.indexOf(match);
+}

Diagram-Canvas/Scripts/src/utils/getBordersSize.js

@@ -0,0 +1,19 @@
+/*
+ * Helper to detect borders of a given element
+ * @method
+ * @memberof Popper.Utils
+ * @param {CSSStyleDeclaration} styles
+ * Result of `getStyleComputedProperty` on the given element
+ * @param {String} axis - `x` or `y`
+ * @return {number} borders - The borders size of the given axis
+ */
+
+export default function getBordersSize(styles, axis) {
+  const sideA = axis === 'x' ? 'Left' : 'Top';
+  const sideB = sideA === 'Left' ? 'Right' : 'Bottom';
+
+  return (
+    parseFloat(styles[`border${sideA}Width`]) +
+    parseFloat(styles[`border${sideB}Width`])
+  );
+}

Diagram-Canvas/Scripts/src/utils/getBoundaries.js

@@ -0,0 +1,81 @@
+import getScrollParent from './getScrollParent';
+import getParentNode from './getParentNode';
+import getReferenceNode from './getReferenceNode';
+import findCommonOffsetParent from './findCommonOffsetParent';
+import getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';
+import getViewportOffsetRectRelativeToArtbitraryNode from './getViewportOffsetRectRelativeToArtbitraryNode';
+import getWindowSizes from './getWindowSizes';
+import isFixed from './isFixed';
+import getFixedPositionOffsetParent from './getFixedPositionOffsetParent';
+
+/**
+ * Computed the boundaries limits and return them
+ * @method
+ * @memberof Popper.Utils
+ * @param {HTMLElement} popper
+ * @param {HTMLElement} reference
+ * @param {number} padding
+ * @param {HTMLElement} boundariesElement - Element used to define the boundaries
+ * @param {Boolean} fixedPosition - Is in fixed position mode
+ * @returns {Object} Coordinates of the boundaries
+ */
+export default function getBoundaries(
+  popper,
+  reference,
+  padding,
+  boundariesElement,
+  fixedPosition = false
+) {
+  // NOTE: 1 DOM access here
+
+  let boundaries = { top: 0, left: 0 };
+  const offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
+
+  // Handle viewport case
+  if (boundariesElement === 'viewport' ) {
+    boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
+  }
+
+  else {
+    // Handle other cases based on DOM element used as boundaries
+    let boundariesNode;
+    if (boundariesElement === 'scrollParent') {
+      boundariesNode = getScrollParent(getParentNode(reference));
+      if (boundariesNode.nodeName === 'BODY') {
+        boundariesNode = popper.ownerDocument.documentElement;
+      }
+    } else if (boundariesElement === 'window') {
+      boundariesNode = popper.ownerDocument.documentElement;
+    } else {
+      boundariesNode = boundariesElement;
+    }
+
+    const offsets = getOffsetRectRelativeToArbitraryNode(
+      boundariesNode,
+      offsetParent,
+      fixedPosition
+    );
+
+    // In case of HTML, we need a different computation
+    if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
+      const { height, width } = getWindowSizes(popper.ownerDocument);
+      boundaries.top += offsets.top - offsets.marginTop;
+      boundaries.bottom = height + offsets.top;
+      boundaries.left += offsets.left - offsets.marginLeft;
+      boundaries.right = width + offsets.left;
+    } else {
+      // for all the other DOM elements, this one is good
+      boundaries = offsets;
+    }
+  }
+
+  // Add paddings
+  padding = padding || 0;
+  const isPaddingNumber = typeof padding === 'number';
+  boundaries.left += isPaddingNumber ? padding : padding.left || 0; 
+  boundaries.top += isPaddingNumber ? padding : padding.top || 0; 
+  boundaries.right -= isPaddingNumber ? padding : padding.right || 0; 
+  boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0; 
+
+  return boundaries;
+}

Diagram-Canvas/Scripts/src/utils/getBoundingClientRect.js

@@ -0,0 +1,66 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import getBordersSize from './getBordersSize';
+import getWindowSizes from './getWindowSizes';
+import getScroll from './getScroll';
+import getClientRect from './getClientRect';
+import isIE from './isIE';
+
+/**
+ * Get bounding client rect of given element
+ * @method
+ * @memberof Popper.Utils
+ * @param {HTMLElement} element
+ * @return {Object} client rect
+ */
+export default function getBoundingClientRect(element) {
+  let rect = {};
+
+  // IE10 10 FIX: Please, don't ask, the element isn't
+  // considered in DOM in some circumstances...
+  // This isn't reproducible in IE10 compatibility mode of IE11
+  try {
+    if (isIE(10)) {
+      rect = element.getBoundingClientRect();
+      const scrollTop = getScroll(element, 'top');
+      const scrollLeft = getScroll(element, 'left');
+      rect.top += scrollTop;
+      rect.left += scrollLeft;
+      rect.bottom += scrollTop;
+      rect.right += scrollLeft;
+    }
+    else {
+      rect = element.getBoundingClientRect();
+    }
+  }
+  catch(e){}
+
+  const result = {
+    left: rect.left,
+    top: rect.top,
+    width: rect.right - rect.left,
+    height: rect.bottom - rect.top,
+  };
+
+  // subtract scrollbar size from sizes
+  const sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};
+  const width =
+    sizes.width || element.clientWidth || result.width;
+  const height =
+    sizes.height || element.clientHeight || result.height;
+
+  let horizScrollbar = element.offsetWidth - width;
+  let vertScrollbar = element.offsetHeight - height;
+
+  // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
+  // we make this check conditional for performance reasons
+  if (horizScrollbar || vertScrollbar) {
+    const styles = getStyleComputedProperty(element);
+    horizScrollbar -= getBordersSize(styles, 'x');
+    vertScrollbar -= getBordersSize(styles, 'y');
+
+    result.width -= horizScrollbar;
+    result.height -= vertScrollbar;
+  }
+
+  return getClientRect(result);
+}

Diagram-Canvas/Scripts/src/utils/getClientRect.js

@@ -0,0 +1,14 @@
+/**
+ * Given element offsets, generate an output similar to getBoundingClientRect
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Object} offsets
+ * @returns {Object} ClientRect like output
+ */
+export default function getClientRect(offsets) {
+  return {
+    ...offsets,
+    right: offsets.left + offsets.width,
+    bottom: offsets.top + offsets.height,
+  };
+}

Diagram-Canvas/Scripts/src/utils/getFixedPositionOffsetParent.js

@@ -0,0 +1,22 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import isIE from './isIE';
+/**
+ * Finds the first parent of an element that has a transformed property defined
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} first transformed parent or documentElement
+ */
+
+export default function getFixedPositionOffsetParent(element) {
+  // This check is needed to avoid errors in case one of the elements isn't defined for any reason
+   if (!element || !element.parentElement || isIE()) {
+    return document.documentElement;
+  }
+  let el = element.parentElement;
+  while (el && getStyleComputedProperty(el, 'transform') === 'none') {
+    el = el.parentElement;
+  }
+  return el || document.documentElement;
+
+}

Diagram-Canvas/Scripts/src/utils/getOffsetParent.js

@@ -0,0 +1,40 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import isIE from './isIE';
+/**
+ * Returns the offset parent of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} offset parent
+ */
+export default function getOffsetParent(element) {
+  if (!element) {
+    return document.documentElement;
+  }
+
+  const noOffsetParent = isIE(10) ? document.body : null;
+
+  // NOTE: 1 DOM access here
+  let offsetParent = element.offsetParent || null;
+  // Skip hidden elements which don't have an offsetParent
+  while (offsetParent === noOffsetParent && element.nextElementSibling) {
+    offsetParent = (element = element.nextElementSibling).offsetParent;
+  }
+
+  const nodeName = offsetParent && offsetParent.nodeName;
+
+  if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
+    return element ? element.ownerDocument.documentElement : document.documentElement;
+  }
+
+  // .offsetParent will return the closest TH, TD or TABLE in case
+  // no offsetParent is present, I hate this job...
+  if (
+    ['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 &&
+    getStyleComputedProperty(offsetParent, 'position') === 'static'
+  ) {
+    return getOffsetParent(offsetParent);
+  }
+
+  return offsetParent;
+}

Diagram-Canvas/Scripts/src/utils/getOffsetRect.js

@@ -0,0 +1,32 @@
+import getWindowSizes from './getWindowSizes';
+import getClientRect from './getClientRect';
+
+/**
+ * Get the position of the given element, relative to its offset parent
+ * @method
+ * @memberof Popper.Utils
+ * @param {Element} element
+ * @return {Object} position - Coordinates of the element and its `scrollTop`
+ */
+export default function getOffsetRect(element) {
+  let elementRect;
+  if (element.nodeName === 'HTML') {
+    const { width, height } = getWindowSizes(element.ownerDocument);
+    elementRect = {
+      width,
+      height,
+      left: 0,
+      top: 0,
+    };
+  } else {
+    elementRect = {
+      width: element.offsetWidth,
+      height: element.offsetHeight,
+      left: element.offsetLeft,
+      top: element.offsetTop,
+    };
+  }
+
+  // position
+  return getClientRect(elementRect);
+}

Diagram-Canvas/Scripts/src/utils/getOffsetRectRelativeToArbitraryNode.js

@@ -0,0 +1,60 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import includeScroll from './includeScroll';
+import getScrollParent from './getScrollParent';
+import getBoundingClientRect from './getBoundingClientRect';
+import runIsIE from './isIE';
+import getClientRect from './getClientRect';
+
+export default function getOffsetRectRelativeToArbitraryNode(children, parent, fixedPosition = false) {
+  const isIE10 = runIsIE(10);
+  const isHTML = parent.nodeName === 'HTML';
+  const childrenRect = getBoundingClientRect(children);
+  const parentRect = getBoundingClientRect(parent);
+  const scrollParent = getScrollParent(children);
+
+  const styles = getStyleComputedProperty(parent);
+  const borderTopWidth = parseFloat(styles.borderTopWidth);
+  const borderLeftWidth = parseFloat(styles.borderLeftWidth);
+
+  // In cases where the parent is fixed, we must ignore negative scroll in offset calc
+  if(fixedPosition && isHTML) {
+    parentRect.top = Math.max(parentRect.top, 0);
+    parentRect.left = Math.max(parentRect.left, 0);
+  }
+  let offsets = getClientRect({
+    top: childrenRect.top - parentRect.top - borderTopWidth,
+    left: childrenRect.left - parentRect.left - borderLeftWidth,
+    width: childrenRect.width,
+    height: childrenRect.height,
+  });
+  offsets.marginTop = 0;
+  offsets.marginLeft = 0;
+
+  // Subtract margins of documentElement in case it's being used as parent
+  // we do this only on HTML because it's the only element that behaves
+  // differently when margins are applied to it. The margins are included in
+  // the box of the documentElement, in the other cases not.
+  if (!isIE10 && isHTML) {
+    const marginTop = parseFloat(styles.marginTop);
+    const marginLeft = parseFloat(styles.marginLeft);
+
+    offsets.top -= borderTopWidth - marginTop;
+    offsets.bottom -= borderTopWidth - marginTop;
+    offsets.left -= borderLeftWidth - marginLeft;
+    offsets.right -= borderLeftWidth - marginLeft;
+
+    // Attach marginTop and marginLeft because in some circumstances we may need them
+    offsets.marginTop = marginTop;
+    offsets.marginLeft = marginLeft;
+  }
+
+  if (
+    isIE10 && !fixedPosition
+      ? parent.contains(scrollParent)
+      : parent === scrollParent && scrollParent.nodeName !== 'BODY'
+  ) {
+    offsets = includeScroll(offsets, parent);
+  }
+
+  return offsets;
+}

Diagram-Canvas/Scripts/src/utils/getOppositePlacement.js

@@ -0,0 +1,11 @@
+/**
+ * Get the opposite placement of the given one
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement
+ * @returns {String} flipped placement
+ */
+export default function getOppositePlacement(placement) {
+  const hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
+  return placement.replace(/left|right|bottom|top/g, matched => hash[matched]);
+}

Diagram-Canvas/Scripts/src/utils/getOppositeVariation.js

@@ -0,0 +1,15 @@
+/**
+ * Get the opposite placement variation of the given one
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement variation
+ * @returns {String} flipped placement variation
+ */
+export default function getOppositeVariation(variation) {
+  if (variation === 'end') {
+    return 'start';
+  } else if (variation === 'start') {
+    return 'end';
+  }
+  return variation;
+}

Diagram-Canvas/Scripts/src/utils/getOuterSizes.js

@@ -0,0 +1,18 @@
+/**
+ * Get the outer sizes of the given element (offset size + margins)
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Object} object containing width and height properties
+ */
+export default function getOuterSizes(element) {
+  const window = element.ownerDocument.defaultView;
+  const styles = window.getComputedStyle(element);
+  const x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);
+  const y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);
+  const result = {
+    width: element.offsetWidth + y,
+    height: element.offsetHeight + x,
+  };
+  return result;
+}

Diagram-Canvas/Scripts/src/utils/getParentNode.js

@@ -0,0 +1,13 @@
+/**
+ * Returns the parentNode or the host of the element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} parent
+ */
+export default function getParentNode(element) {
+  if (element.nodeName === 'HTML') {
+    return element;
+  }
+  return element.parentNode || element.host;
+}

Diagram-Canvas/Scripts/src/utils/getPopperOffsets.js

@@ -0,0 +1,46 @@
+import getOuterSizes from './getOuterSizes';
+import getOppositePlacement from './getOppositePlacement';
+
+/**
+ * Get offsets to the popper
+ * @method
+ * @memberof Popper.Utils
+ * @param {Object} position - CSS position the Popper will get applied
+ * @param {HTMLElement} popper - the popper element
+ * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
+ * @param {String} placement - one of the valid placement options
+ * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
+ */
+export default function getPopperOffsets(popper, referenceOffsets, placement) {
+  placement = placement.split('-')[0];
+
+  // Get popper node sizes
+  const popperRect = getOuterSizes(popper);
+
+  // Add position, width and height to our offsets object
+  const popperOffsets = {
+    width: popperRect.width,
+    height: popperRect.height,
+  };
+
+  // depending by the popper placement we have to compute its offsets slightly differently
+  const isHoriz = ['right', 'left'].indexOf(placement) !== -1;
+  const mainSide = isHoriz ? 'top' : 'left';
+  const secondarySide = isHoriz ? 'left' : 'top';
+  const measurement = isHoriz ? 'height' : 'width';
+  const secondaryMeasurement = !isHoriz ? 'height' : 'width';
+
+  popperOffsets[mainSide] =
+    referenceOffsets[mainSide] +
+    referenceOffsets[measurement] / 2 -
+    popperRect[measurement] / 2;
+  if (placement === secondarySide) {
+    popperOffsets[secondarySide] =
+      referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
+  } else {
+    popperOffsets[secondarySide] =
+      referenceOffsets[getOppositePlacement(secondarySide)];
+  }
+
+  return popperOffsets;
+}

Diagram-Canvas/Scripts/src/utils/getReferenceNode.js

@@ -0,0 +1,10 @@
+/**
+ * Returns the reference node of the reference object, or the reference object itself.
+ * @method
+ * @memberof Popper.Utils
+ * @param {Element|Object} reference - the reference element (the popper will be relative to this)
+ * @returns {Element} parent
+ */
+export default function getReferenceNode(reference) {
+  return reference && reference.referenceNode ? reference.referenceNode : reference;
+}

Diagram-Canvas/Scripts/src/utils/getReferenceOffsets.js

@@ -0,0 +1,19 @@
+import findCommonOffsetParent from './findCommonOffsetParent';
+import getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';
+import getFixedPositionOffsetParent from './getFixedPositionOffsetParent';
+import getReferenceNode from './getReferenceNode';
+
+/**
+ * Get offsets to the reference element
+ * @method
+ * @memberof Popper.Utils
+ * @param {Object} state
+ * @param {Element} popper - the popper element
+ * @param {Element} reference - the reference element (the popper will be relative to this)
+ * @param {Element} fixedPosition - is in fixed position mode
+ * @returns {Object} An object containing the offsets which will be applied to the popper
+ */
+export default function getReferenceOffsets(state, popper, reference, fixedPosition = null) {
+  const commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
+  return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
+}

Diagram-Canvas/Scripts/src/utils/getRoot.js

@@ -0,0 +1,14 @@
+/**
+ * Finds the root node (document, shadowDOM root) of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} node
+ * @returns {Element} root node
+ */
+export default function getRoot(node) {
+  if (node.parentNode !== null) {
+    return getRoot(node.parentNode);
+  }
+
+  return node;
+}

Diagram-Canvas/Scripts/src/utils/getRoundedOffsets.js

@@ -0,0 +1,50 @@
+/**
+ * @function
+ * @memberof Popper.Utils
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Boolean} shouldRound - If the offsets should be rounded at all
+ * @returns {Object} The popper's position offsets rounded
+ *
+ * The tale of pixel-perfect positioning. It's still not 100% perfect, but as
+ * good as it can be within reason.
+ * Discussion here: https://github.com/FezVrasta/popper.js/pull/715
+ *
+ * Low DPI screens cause a popper to be blurry if not using full pixels (Safari
+ * as well on High DPI screens).
+ *
+ * Firefox prefers no rounding for positioning and does not have blurriness on
+ * high DPI screens.
+ *
+ * Only horizontal placement and left/right values need to be considered.
+ */
+export default function getRoundedOffsets(data, shouldRound) {
+  const { popper, reference } = data.offsets;
+  const { round, floor } = Math;
+  const noRound = v => v;
+  
+  const referenceWidth = round(reference.width);
+  const popperWidth = round(popper.width);
+  
+  const isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
+  const isVariation = data.placement.indexOf('-') !== -1;
+  const sameWidthParity = referenceWidth % 2 === popperWidth % 2;
+  const bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
+
+  const horizontalToInteger = !shouldRound
+    ? noRound
+    : isVertical || isVariation || sameWidthParity
+    ? round
+    : floor;
+  const verticalToInteger = !shouldRound ? noRound : round;
+
+  return {
+    left: horizontalToInteger(
+      bothOddWidth && !isVariation && shouldRound
+        ? popper.left - 1
+        : popper.left
+    ),
+    top: verticalToInteger(popper.top),
+    bottom: verticalToInteger(popper.bottom),
+    right: horizontalToInteger(popper.right),
+  };
+}

Diagram-Canvas/Scripts/src/utils/getScroll.js

@@ -0,0 +1,20 @@
+/**
+ * Gets the scroll value of the given element in the given side (top and left)
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @argument {String} side `top` or `left`
+ * @returns {number} amount of scrolled pixels
+ */
+export default function getScroll(element, side = 'top') {
+  const upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
+  const nodeName = element.nodeName;
+
+  if (nodeName === 'BODY' || nodeName === 'HTML') {
+    const html = element.ownerDocument.documentElement;
+    const scrollingElement = element.ownerDocument.scrollingElement || html;
+    return scrollingElement[upperSide];
+  }
+
+  return element[upperSide];
+}

Diagram-Canvas/Scripts/src/utils/getScrollParent.js

@@ -0,0 +1,32 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import getParentNode from './getParentNode';
+
+/**
+ * Returns the scrolling parent of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} scroll parent
+ */
+export default function getScrollParent(element) {
+  // Return body, `getScroll` will take care to get the correct `scrollTop` from it
+  if (!element) {
+    return document.body
+  }
+
+  switch (element.nodeName) {
+    case 'HTML':
+    case 'BODY':
+      return element.ownerDocument.body
+    case '#document':
+      return element.body
+  }
+
+  // Firefox want us to check `-x` and `-y` variations as well
+  const { overflow, overflowX, overflowY } = getStyleComputedProperty(element);
+  if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
+    return element;
+  }
+
+  return getScrollParent(getParentNode(element));
+}

Diagram-Canvas/Scripts/src/utils/getStyleComputedProperty.js

@@ -0,0 +1,16 @@
+/**
+ * Get CSS computed property of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Eement} element
+ * @argument {String} property
+ */
+export default function getStyleComputedProperty(element, property) {
+  if (element.nodeType !== 1) {
+    return [];
+  }
+  // NOTE: 1 DOM access here
+  const window = element.ownerDocument.defaultView;
+  const css = window.getComputedStyle(element, null);
+  return property ? css[property] : css;
+}

Diagram-Canvas/Scripts/src/utils/getSupportedPropertyName.js

@@ -0,0 +1,20 @@
+/**
+ * Get the prefixed supported property name
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} property (camelCase)
+ * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)
+ */
+export default function getSupportedPropertyName(property) {
+  const prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
+  const upperProp = property.charAt(0).toUpperCase() + property.slice(1);
+
+  for (let i = 0; i < prefixes.length; i++) {
+    const prefix = prefixes[i];
+    const toCheck = prefix ? `${prefix}${upperProp}` : property;
+    if (typeof document.body.style[toCheck] !== 'undefined') {
+      return toCheck;
+    }
+  }
+  return null;
+}

Diagram-Canvas/Scripts/src/utils/getViewportOffsetRectRelativeToArtbitraryNode.js

@@ -0,0 +1,22 @@
+import getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';
+import getScroll from './getScroll';
+import getClientRect from './getClientRect';
+
+export default function getViewportOffsetRectRelativeToArtbitraryNode(element, excludeScroll = false) {
+  const html = element.ownerDocument.documentElement;
+  const relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
+  const width = Math.max(html.clientWidth, window.innerWidth || 0);
+  const height = Math.max(html.clientHeight, window.innerHeight || 0);
+
+  const scrollTop = !excludeScroll ? getScroll(html) : 0;
+  const scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;
+
+  const offset = {
+    top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
+    left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
+    width,
+    height,
+  };
+
+  return getClientRect(offset);
+}