feat: shim web worker

package.json

@@ -83,7 +83,7 @@
     "react-dom": "16.9.0",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-web-worker-loader": "p0lip/rollup-plugin-web-worker-loader",
+    "rollup-plugin-web-worker-loader": "p0lip/rollup-plugin-web-worker-loader#d833c63590598ec66d051066826b6ce8d57710a9",
     "ts-jest": "^24.0.2",
     "tslint": "^5.19.0",
     "tslint-config-stoplight": "^1.2.0",

src/components/JsonSchemaViewer.tsx

@@ -3,7 +3,7 @@ import { Intent, Spinner } from '@stoplight/ui-kit';
 import cn from 'classnames';
 import { runInAction } from 'mobx';
 import * as React from 'react';
-import SchemaWorker from 'web-worker:../workers/schema.ts';
+import SchemaWorker, { WebWorker } from 'web-worker:../workers/schema.ts';
 
 import { JSONSchema4 } from 'json-schema';
 import { GoToRefHandler, RowRenderer, SchemaTreeListNode } from '../types';
@@ -35,7 +35,7 @@ export interface IJsonSchemaViewer {
 export class JsonSchemaViewerComponent extends React.PureComponent<IJsonSchemaViewer> {
   protected treeStore: TreeStore;
   protected instanceId: string;
-  protected schemaWorker?: Worker;
+  protected schemaWorker?: WebWorker;
 
   public state = {
     computing: false,
@@ -82,19 +82,23 @@ export class JsonSchemaViewerComponent extends React.PureComponent<IJsonSchemaVi
 
   protected prerenderSchema() {
     const schema = this.schema;
-    let needsFullRendering = true;
+    const isWorkerSpawn = this.schemaWorker !== void 0 && !('isShim' in this.schemaWorker);
+    let needsFullRendering = isWorkerSpawn;
+
     const renderedSchema = renderSchema(
       schema,
       0,
       { path: [] },
-      {
-        depth: this.expandedDepth + 1,
-      },
+      isWorkerSpawn
+        ? {
+            depth: this.expandedDepth + 1,
+          }
+        : void 0,
     );
 
     const nodes: SchemaTreeListNode[] = [];
 
-    if (this.props.maxRows !== undefined) {
+    if (isWorkerSpawn && this.props.maxRows !== undefined) {
       let i = this.props.maxRows;
       let hasAllOf = false;
       for (const node of renderedSchema) {

src/components/__tests__/JsonSchemaViewer.spec.tsx

@@ -41,6 +41,10 @@ describe('JSON Schema Viewer component', () => {
     (SchemaWorker.prototype.addEventListener as jest.Mock).mockClear();
   });
 
+  afterEach(() => {
+    delete SchemaWorker.prototype.isShim;
+  });
+
   test('should render empty message if schema is empty', () => {
     (isSchemaViewerEmpty as jest.Mock).mockReturnValue(true);
     const wrapper = shallow(<JsonSchemaViewerComponent schema={{}} />);
@@ -155,6 +159,14 @@ describe('JSON Schema Viewer component', () => {
     expect(wrapper.instance()).toHaveProperty('treeStore.nodes', nodes);
   });
 
+  test('should render all nodes on main thread when worker cannot be spawned regardless of maxRows or schema', () => {
+    SchemaWorker.prototype.isShim = true;
+    const wrapper = shallow(<JsonSchemaViewerComponent schema={schema as JSONSchema4} maxRows={1} />);
+
+    expect(SchemaWorker.prototype.postMessage).not.toHaveBeenCalled();
+    expect(wrapper.instance()).toHaveProperty('treeStore.nodes.length', 4);
+  });
+
   test('should not apply result of full processing in a worker if instance ids do not match', () => {
     const wrapper = shallow(<JsonSchemaViewerComponent schema={schema as JSONSchema4} maxRows={0} />);
     expect(SchemaWorker.prototype.postMessage).toHaveBeenCalledWith({

web-worker-loader.d.ts

@@ -1,10 +1,16 @@
 declare module 'web-worker:*' {
-  declare var WebWorker: {
-    prototype: Worker;
-    new (): Worker;
+  // tslint:disable-next-line:interface-name
+  declare interface ShimmedWebWorker extends Worker {
+    isShim: true;
+  }
+
+  declare const WebWorker: {
+    prototype: Worker | ShimmedWebWorker;
+    new (): Worker | ShimmedWebWorker;
   };
 
   export default WebWorker;
+  export type WebWorker = Worker | ShimmedWebWorker;
 }
 
 declare module 'rollup-plugin-web-worker-loader-helper' {

yarn.lock

@@ -5354,7 +5354,7 @@ debug@^4.0.0, debug@^4.0.1, debug@^4.1.0, debug@^4.1.1:
   dependencies:
     ms "^2.1.1"
 
-debuglog@*, debuglog@^1.0.1:
+debuglog@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debuglog/-/debuglog-1.0.1.tgz#aa24ffb9ac3df9a2351837cfb2d279360cd78492"
   integrity sha1-qiT/uaw9+aI1GDfPstJ5NgzXhJI=
@@ -7580,7 +7580,7 @@ import-local@^2.0.0:
     pkg-dir "^3.0.0"
     resolve-cwd "^2.0.0"
 
-imurmurhash@*, imurmurhash@^0.1.4:
+imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
   integrity sha1-khi5srkoojixPcT7a21XbyMUU+o=
@@ -9261,11 +9261,6 @@ lodash-es@^4.17.11, lodash-es@^4.17.15:
   resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.15.tgz#21bd96839354412f23d7a10340e5eac6ee455d78"
   integrity sha512-rlrc3yU3+JNOpZ9zj5pQtxnx2THmvRykwL4Xlxoa8I9lHBlVbbyPhgyPMioxVZ4NqyxaVVtaJnzsyOidQIhyyQ==
 
-lodash._baseindexof@*:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/lodash._baseindexof/-/lodash._baseindexof-3.1.0.tgz#fe52b53a1c6761e42618d654e4a25789ed61822c"
-  integrity sha1-/lK1OhxnYeQmGNZU5KJXie1hgiw=
-
 lodash._baseisequal@^3.0.0:
   version "3.0.7"
   resolved "https://registry.yarnpkg.com/lodash._baseisequal/-/lodash._baseisequal-3.0.7.tgz#d8025f76339d29342767dcc887ce5cb95a5b51f1"
@@ -9283,29 +9278,17 @@ lodash._baseuniq@~4.6.0:
     lodash._createset "~4.0.0"
     lodash._root "~3.0.0"
 
-lodash._bindcallback@*, lodash._bindcallback@^3.0.0:
+lodash._bindcallback@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/lodash._bindcallback/-/lodash._bindcallback-3.0.1.tgz#e531c27644cf8b57a99e17ed95b35c748789392e"
   integrity sha1-5THCdkTPi1epnhftlbNcdIeJOS4=
 
-lodash._cacheindexof@*:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/lodash._cacheindexof/-/lodash._cacheindexof-3.0.2.tgz#3dc69ac82498d2ee5e3ce56091bafd2adc7bde92"
-  integrity sha1-PcaayCSY0u5ePOVgkbr9Ktx73pI=
-
-lodash._createcache@*:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/lodash._createcache/-/lodash._createcache-3.1.2.tgz#56d6a064017625e79ebca6b8018e17440bdcf093"
-  integrity sha1-VtagZAF2JeeevKa4AY4XRAvc8JM=
-  dependencies:
-    lodash._getnative "^3.0.0"
-
 lodash._createset@~4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/lodash._createset/-/lodash._createset-4.0.3.tgz#0f4659fbb09d75194fa9e2b88a6644d363c9fe26"
   integrity sha1-D0ZZ+7CddRlPqeK4imZE02PJ/iY=
 
-lodash._getnative@*, lodash._getnative@^3.0.0:
+lodash._getnative@^3.0.0:
   version "3.9.1"
   resolved "https://registry.yarnpkg.com/lodash._getnative/-/lodash._getnative-3.9.1.tgz#570bc7dede46d61cdcde687d65d3eecbaa3aaff5"
   integrity sha1-VwvH3t5G1hzc3mh9ZdPuy6o6r/U=
@@ -9422,11 +9405,6 @@ lodash.pick@^4.4.0:
   resolved "https://registry.yarnpkg.com/lodash.pick/-/lodash.pick-4.4.0.tgz#52f05610fff9ded422611441ed1fc123a03001b3"
   integrity sha1-UvBWEP/53tQiYRRB7R/BI6AwAbM=
 
-lodash.restparam@*:
-  version "3.6.1"
-  resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
-  integrity sha1-k2pOMJ7zMKdkXtQUWYbIWuWyCAU=
-
 lodash.set@^4.3.2:
   version "4.3.2"
   resolved "https://registry.yarnpkg.com/lodash.set/-/lodash.set-4.3.2.tgz#d8757b1da807dde24816b0d6a84bea1a76230b23"
@@ -13014,9 +12992,9 @@ rollup-plugin-typescript2@^0.21.1:
     rollup-pluginutils "2.6.0"
     tslib "1.9.3"
 
-rollup-plugin-web-worker-loader@p0lip/rollup-plugin-web-worker-loader:
-  version "0.5.2"
-  resolved "https://codeload.github.com/p0lip/rollup-plugin-web-worker-loader/tar.gz/c06acd26282c537e03d30848dcabecd4581e4111"
+rollup-plugin-web-worker-loader@p0lip/rollup-plugin-web-worker-loader#d833c63590598ec66d051066826b6ce8d57710a9:
+  version "0.5.3"
+  resolved "https://codeload.github.com/p0lip/rollup-plugin-web-worker-loader/tar.gz/d833c63590598ec66d051066826b6ce8d57710a9"
 
 rollup-pluginutils@2.6.0:
   version "2.6.0"