jsfiddle/modules/canvaskit-fiddle-sk/canvaskit-fiddle-sk.ts

import 'elements-sk/error-toast-sk';
import { define } from 'elements-sk/define';
import { html } from 'lit-html';
import { CanvasKitInit as CKInit } from 'canvaskit-wasm';
import { WasmFiddle } from '../wasm-fiddle-sk/wasm-fiddle-sk';
import '../../../infra-sk/modules/theme-chooser-sk';
import '../../../infra-sk/modules/app-sk';

// It is assumed that canvaskit.js has been loaded and this symbol is available globally.
declare const CanvasKitInit: typeof CKInit;

// It is assumed that this symbol is being provided by a version.js file loaded in before this
// file.
declare const SKIA_VERSION: string;

// Main template for this element
const template = (ele: WasmFiddle) => html`
<app-sk>
  <header>
    <h1>CanvasKit Fiddle</h1>
    <div class="version">
      <a href="https://skia.googlesource.com/skia/+show/${SKIA_VERSION}"
        >${SKIA_VERSION.substring(0, 10)}</a
      >
      <theme-chooser-sk></theme-chooser-sk>
    </div>
  </header>

  <main>
    ${WasmFiddle.codeEditor(ele)}
    <div class="output">
      ${ele.sliders.map(WasmFiddle.floatSlider)}
      ${ele.colorpickers.map(WasmFiddle.colorPicker)}
      ${ele.fpsMeter ? html`<div class="widget" id="fps">0 FPS</div>` : ''}
      <div class="buttons">
        <button
          class="action ${ele.hasRun || !ele.loadedWasm ? '' : 'prompt'}"
          @click=${ele.run}
        >
          Run
        </button>
        <button @click=${ele.save}>Save</button>
      </div>
      <div id="canvasContainer"><canvas width="500" height="500"></canvas></div>
      <textarea id="logsContainer" placeholder="Console Logs" readonly>
${ele.log}</textarea
      >
    </div>
  </main>
  <footer>
    <error-toast-sk></error-toast-sk>
  </footer>
</app-sk>
`;

const wasmPromise = CanvasKitInit({
  locateFile: (file: string) => `/res/${file}`,
});

/**
 * @module jsfiddle/modules/canvaskit-fiddle-sk
 * @description <h2><code>canvaskit-fiddle-sk</code></h2>
 *
 * <p>
 *   The top level element for displaying canvaskit fiddles.
 *   The main elements are a code editor box (textarea), a canvas
 *   on which to render the result and a few buttons.
 * </p>
 *
 */

class CanvasKitFiddle extends WasmFiddle {
  constructor() {
    super(wasmPromise, template, 'CanvasKit', 'canvaskit');
  }
}

define(
  'canvaskit-fiddle-sk', CanvasKitFiddle,
);