Fix scanning of small QR codes with JS

build-scripts/gulp/gather-static.js

@@ -106,6 +106,14 @@ function copyMapPanel(staticDir) {
   );
 }
 
+function copyZXingWasm(staticDir) {
+  const staticPath = genStaticPath(staticDir);
+  copyFileDir(
+    npmPath("zxing-wasm/dist/reader/zxing_reader.wasm"),
+    staticPath("js")
+  );
+}
+
 gulp.task("copy-locale-data", async () => {
   const staticDir = paths.app_output_static;
   copyLocaleData(staticDir);
@@ -143,6 +151,7 @@ gulp.task("copy-static-app", async () => {
   copyMapPanel(staticDir);
 
   // Qr Scanner assets
+  copyZXingWasm(staticDir);
   copyQrScannerWorker(staticDir);
 });
 

package.json

@@ -98,6 +98,7 @@
     "@webcomponents/scoped-custom-element-registry": "0.0.9",
     "@webcomponents/webcomponentsjs": "2.8.0",
     "app-datepicker": "5.1.1",
+    "barcode-detector": "2.2.11",
     "chart.js": "4.4.6",
     "color-name": "2.0.0",
     "comlink": "4.4.1",

src/components/ha-qr-scanner.ts

@@ -4,6 +4,11 @@ import type { UnsubscribeFunc } from "home-assistant-js-websocket";
 import type { PropertyValues } from "lit";
 import { css, html, LitElement, nothing } from "lit";
 import { customElement, property, query, state } from "lit/decorators";
+// The BarcodeDetector Web API is not yet supported in all browsers,
+// and "qr-scanner" defaults to a suboptimal implementation if it is not available.
+// The following import makes a better implementation available that is based on a
+// WebAssembly port of ZXing:
+import { setZXingModuleOverrides } from "barcode-detector";
 import type QrScanner from "qr-scanner";
 import { fireEvent } from "../common/dom/fire_event";
 import { stopPropagation } from "../common/dom/stop_propagation";
@@ -16,6 +21,15 @@ import "./ha-list-item";
 import "./ha-textfield";
 import type { HaTextField } from "./ha-textfield";
 
+setZXingModuleOverrides({
+  locateFile: (path: string, prefix: string) => {
+    if (path.endsWith(".wasm")) {
+      return "/static/js/zxing_reader.wasm";
+    }
+    return prefix + path;
+  },
+});
+
 @customElement("ha-qr-scanner")
 class HaQrScanner extends LitElement {
   @property({ attribute: false }) public hass!: HomeAssistant;
@@ -174,7 +188,7 @@ class HaQrScanner extends LitElement {
   }
 
   private _qrCodeError = (err: any) => {
-    if (err === "No QR code found") {
+    if (err.endsWith("No QR code found")) {
       this._qrNotFoundCount++;
       if (this._qrNotFoundCount === 250) {
         this._reportError(err);

src/panels/config/integrations/integration-panels/zwave_js/dialog-zwave_js-add-node.ts

@@ -690,9 +690,6 @@ class DialogZWaveJSAddNode extends LitElement {
           provisioningInfo
         );
         this._status = "provisioned";
-        if (this._params?.addedCallback) {
-          this._params.addedCallback();
-        }
       } catch (err: any) {
         this._error = err.message;
         this._status = "failed";
@@ -831,9 +828,6 @@ class DialogZWaveJSAddNode extends LitElement {
         if (message.event === "interview completed") {
           this._unsubscribe();
           this._status = "finished";
-          if (this._params?.addedCallback) {
-            this._params.addedCallback();
-          }
         }
 
         if (message.event === "interview stage completed") {
@@ -874,6 +868,9 @@ class DialogZWaveJSAddNode extends LitElement {
     }
     if (this._entryId) {
       stopZwaveInclusion(this.hass, this._entryId);
+      if (this._params?.onStop) {
+        this._params.onStop();
+      }
     }
     this._requestedGrant = undefined;
     this._dsk = undefined;

src/panels/config/integrations/integration-panels/zwave_js/show-dialog-zwave_js-add-node.ts

@@ -2,7 +2,7 @@ import { fireEvent } from "../../../../../common/dom/fire_event";
 
 export interface ZWaveJSAddNodeDialogParams {
   entry_id: string;
-  addedCallback?: () => void;
+  onStop?: () => void;
 }
 
 export const loadAddNodeDialog = () => import("./dialog-zwave_js-add-node");

src/panels/config/integrations/integration-panels/zwave_js/zwave_js-config-dashboard.ts

@@ -564,7 +564,8 @@ class ZWaveJSConfigDashboard extends SubscribeMixin(LitElement) {
   private async _addNodeClicked() {
     showZWaveJSAddNodeDialog(this, {
       entry_id: this.configEntryId!,
-      addedCallback: () => this._fetchData(),
+      // refresh the data after the dialog is closed. add a small delay for the inclusion state to update
+      onStop: () => setTimeout(() => this._fetchData(), 100),
     });
   }
 

yarn.lock

@@ -3944,6 +3944,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/dom-webcodecs@npm:^0.1.13":
+  version: 0.1.13
+  resolution: "@types/dom-webcodecs@npm:0.1.13"
+  checksum: 10/99cb227416725efd4b22175ef18988ae3fc728480fe6ed2192777d7dba52d18af540b4df49fcfa3cf73753d1dcf9d5399b089702bde215d78679284848b078f7
+  languageName: node
+  linkType: hard
+
+"@types/emscripten@npm:^1.39.13":
+  version: 1.39.13
+  resolution: "@types/emscripten@npm:1.39.13"
+  checksum: 10/02c0446150f9cc2c74dc3a551f86ce13df266c33d8b98d11d9f17263e2d98a6a6b4d36bdd15066c4e1547ae1ed2d52eed9420116b4935d119009e0f53ddbb041
+  languageName: node
+  linkType: hard
+
 "@types/eslint-scope@npm:^3.7.7":
   version: 3.7.7
   resolution: "@types/eslint-scope@npm:3.7.7"
@@ -5742,6 +5756,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"barcode-detector@npm:2.2.11":
+  version: 2.2.11
+  resolution: "barcode-detector@npm:2.2.11"
+  dependencies:
+    "@types/dom-webcodecs": "npm:^0.1.13"
+    zxing-wasm: "npm:1.2.14"
+  checksum: 10/91f04ac8a73a5fccf15d08c2b148e3f9584448956de9b2506f5c5c3213ba133c504cd6890926f4fde2b1294e42b9943f979820440bc8373388d5a86cb6c764c5
+  languageName: node
+  linkType: hard
+
 "bare-events@npm:^2.2.0":
   version: 2.5.0
   resolution: "bare-events@npm:2.5.0"
@@ -8833,6 +8857,7 @@ __metadata:
     app-datepicker: "npm:5.1.1"
     babel-loader: "npm:9.2.1"
     babel-plugin-template-html-minifier: "npm:4.1.0"
+    barcode-detector: "npm:2.2.11"
     browserslist-useragent-regexp: "npm:4.1.3"
     chai: "npm:5.1.2"
     chart.js: "npm:4.4.6"
@@ -15465,3 +15490,12 @@ __metadata:
   checksum: 10/f2e05b767ed3141e6372a80af9caa4715d60969227f38b1a4370d60bffe153c9c5b33a862905609afc9b375ec57cd40999810d20e5e10229a204e8bde7ef255c
   languageName: node
   linkType: hard
+
+"zxing-wasm@npm:1.2.14":
+  version: 1.2.14
+  resolution: "zxing-wasm@npm:1.2.14"
+  dependencies:
+    "@types/emscripten": "npm:^1.39.13"
+  checksum: 10/02ea0408553f1aebb412a97c5e11887c58da1b2adff636302232535e752b91bdb3f358411259b6cddd34b341df565336bc03f48895e362f61316018d9bbff8c3
+  languageName: node
+  linkType: hard