mirror of
https://github.com/nimiq/qr-scanner.git
synced 2026-07-28 04:06:51 +00:00
Daniel
987bbb06c2
On Macs with an M1/M2 processor and macOS Ventura (macOS version 13), the BarcodeDetector is broken in Chromium based browsers, regardless of the version. For that constellation, the BarcodeDetector does not error but does not detect QR codes. Macs without an M1/M2 or before Ventura are fine. See https://bugs.chromium.org/p/chromium/issues/detail?id=1382442. Fixes #209
32 lines
16 KiB
JavaScript
32 lines
16 KiB
JavaScript
'use strict';(function(e,a){"object"===typeof exports&&"undefined"!==typeof module?module.exports=a():"function"===typeof define&&define.amd?define(a):(e="undefined"!==typeof globalThis?globalThis:e||self,e.QrScanner=a())})(this,function(){class e{constructor(a,b,c,d,f){this._legacyCanvasSize=e.DEFAULT_CANVAS_SIZE;this._preferredCamera="environment";this._maxScansPerSecond=25;this._lastScanTimestamp=-1;this._destroyed=this._flashOn=this._paused=this._active=!1;this.$video=a;this.$canvas=document.createElement("canvas");
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c&&"object"===typeof c?this._onDecode=b:(c||d||f?console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future"):console.warn("Note that the type of the scan result passed to onDecode will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."),this._legacyOnDecode=b);b="object"===typeof c?c:{};this._onDecodeError=b.onDecodeError||("function"===typeof c?c:this._onDecodeError);this._calculateScanRegion=
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b.calculateScanRegion||("function"===typeof d?d:this._calculateScanRegion);this._preferredCamera=b.preferredCamera||f||this._preferredCamera;this._legacyCanvasSize="number"===typeof c?c:"number"===typeof d?d:this._legacyCanvasSize;this._maxScansPerSecond=b.maxScansPerSecond||this._maxScansPerSecond;this._onPlay=this._onPlay.bind(this);this._onLoadedMetaData=this._onLoadedMetaData.bind(this);this._onVisibilityChange=this._onVisibilityChange.bind(this);this._updateOverlay=this._updateOverlay.bind(this);
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a.disablePictureInPicture=!0;a.playsInline=!0;a.muted=!0;let h=!1;a.hidden&&(a.hidden=!1,h=!0);document.body.contains(a)||(document.body.appendChild(a),h=!0);c=a.parentElement;if(b.highlightScanRegion||b.highlightCodeOutline){d=!!b.overlay;this.$overlay=b.overlay||document.createElement("div");f=this.$overlay.style;f.position="absolute";f.display="none";f.pointerEvents="none";this.$overlay.classList.add("scan-region-highlight");if(!d&&b.highlightScanRegion){this.$overlay.innerHTML='<svg class="scan-region-highlight-svg" viewBox="0 0 238 238" preserveAspectRatio="none" style="position:absolute;width:100%;height:100%;left:0;top:0;fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round"><path d="M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 0H10a8 8 0 0 1-8-8v-21"/></svg>';
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try{this.$overlay.firstElementChild.animate({transform:["scale(.98)","scale(1.01)"]},{duration:400,iterations:Infinity,direction:"alternate",easing:"ease-in-out"})}catch(m){}c.insertBefore(this.$overlay,this.$video.nextSibling)}b.highlightCodeOutline&&(this.$overlay.insertAdjacentHTML("beforeend",'<svg class="code-outline-highlight" preserveAspectRatio="none" style="display:none;width:100%;height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;stroke-linecap:round;stroke-linejoin:round"><polygon/></svg>'),
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this.$codeOutlineHighlight=this.$overlay.lastElementChild)}this._scanRegion=this._calculateScanRegion(a);requestAnimationFrame(()=>{let m=window.getComputedStyle(a);"none"===m.display&&(a.style.setProperty("display","block","important"),h=!0);"visible"!==m.visibility&&(a.style.setProperty("visibility","visible","important"),h=!0);h&&(console.warn("QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."),a.style.opacity="0",a.style.width="0",a.style.height="0",this.$overlay&&
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this.$overlay.parentElement&&this.$overlay.parentElement.removeChild(this.$overlay),delete this.$overlay,delete this.$codeOutlineHighlight);this.$overlay&&this._updateOverlay()});a.addEventListener("play",this._onPlay);a.addEventListener("loadedmetadata",this._onLoadedMetaData);document.addEventListener("visibilitychange",this._onVisibilityChange);window.addEventListener("resize",this._updateOverlay);this._qrEnginePromise=e.createQrEngine()}static set WORKER_PATH(a){console.warn("Setting QrScanner.WORKER_PATH is not required and not supported anymore. Have a look at the README for new setup instructions.")}static async hasCamera(){try{return!!(await e.listCameras(!1)).length}catch(a){return!1}}static async listCameras(a=
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!1){if(!navigator.mediaDevices)return[];let b=async()=>(await navigator.mediaDevices.enumerateDevices()).filter(d=>"videoinput"===d.kind),c;try{a&&(await b()).every(d=>!d.label)&&(c=await navigator.mediaDevices.getUserMedia({audio:!1,video:!0}))}catch(d){}try{return(await b()).map((d,f)=>({id:d.deviceId,label:d.label||(0===f?"Default Camera":`Camera ${f+1}`)}))}finally{c&&(console.warn("Call listCameras after successfully starting a QR scanner to avoid creating a temporary video stream"),e._stopVideoStream(c))}}async hasFlash(){let a;
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try{if(this.$video.srcObject){if(!(this.$video.srcObject instanceof MediaStream))return!1;a=this.$video.srcObject}else a=(await this._getCameraStream()).stream;return"torch"in a.getVideoTracks()[0].getSettings()}catch(b){return!1}finally{a&&a!==this.$video.srcObject&&(console.warn("Call hasFlash after successfully starting the scanner to avoid creating a temporary video stream"),e._stopVideoStream(a))}}isFlashOn(){return this._flashOn}async toggleFlash(){this._flashOn?await this.turnFlashOff():await this.turnFlashOn()}async turnFlashOn(){if(!this._flashOn&&
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!this._destroyed&&(this._flashOn=!0,this._active&&!this._paused))try{if(!await this.hasFlash())throw"No flash available";await this.$video.srcObject.getVideoTracks()[0].applyConstraints({advanced:[{torch:!0}]})}catch(a){throw this._flashOn=!1,a;}}async turnFlashOff(){this._flashOn&&(this._flashOn=!1,await this._restartVideoStream())}destroy(){this.$video.removeEventListener("loadedmetadata",this._onLoadedMetaData);this.$video.removeEventListener("play",this._onPlay);document.removeEventListener("visibilitychange",
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this._onVisibilityChange);window.removeEventListener("resize",this._updateOverlay);this._destroyed=!0;this._flashOn=!1;this.stop();e._postWorkerMessage(this._qrEnginePromise,"close")}async start(){if(this._destroyed)throw Error("The QR scanner can not be started as it had been destroyed.");if(!this._active||this._paused)if("https:"!==window.location.protocol&&console.warn("The camera stream is only accessible if the page is transferred via https."),this._active=!0,!document.hidden)if(this._paused=
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!1,this.$video.srcObject)await this.$video.play();else try{let {stream:a,facingMode:b}=await this._getCameraStream();!this._active||this._paused?e._stopVideoStream(a):(this._setVideoMirror(b),this.$video.srcObject=a,await this.$video.play(),this._flashOn&&(this._flashOn=!1,this.turnFlashOn().catch(()=>{})))}catch(a){if(!this._paused)throw this._active=!1,a;}}stop(){this.pause();this._active=!1}async pause(a=!1){this._paused=!0;if(!this._active)return!0;this.$video.pause();this.$overlay&&(this.$overlay.style.display=
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"none");let b=()=>{this.$video.srcObject instanceof MediaStream&&(e._stopVideoStream(this.$video.srcObject),this.$video.srcObject=null)};if(a)return b(),!0;await new Promise(c=>setTimeout(c,300));if(!this._paused)return!1;b();return!0}async setCamera(a){a!==this._preferredCamera&&(this._preferredCamera=a,await this._restartVideoStream())}static async scanImage(a,b,c,d,f=!1,h=!1){let m,n=!1;b&&("scanRegion"in b||"qrEngine"in b||"canvas"in b||"disallowCanvasResizing"in b||"alsoTryWithoutScanRegion"in
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b||"returnDetailedScanResult"in b)?(m=b.scanRegion,c=b.qrEngine,d=b.canvas,f=b.disallowCanvasResizing||!1,h=b.alsoTryWithoutScanRegion||!1,n=!0):b||c||d||f||h?console.warn("You're using a deprecated api for scanImage which will be removed in the future."):console.warn("Note that the return type of scanImage will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true.");b=!!c;try{let p,k;[c,p]=await Promise.all([c||e.createQrEngine(),e._loadImage(a)]);
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[d,k]=e._drawToCanvas(p,m,d,f);let q;if(c instanceof Worker){let g=c;b||e._postWorkerMessageSync(g,"inversionMode","both");q=await new Promise((l,v)=>{let w,u,r,y=-1;u=t=>{t.data.id===y&&(g.removeEventListener("message",u),g.removeEventListener("error",r),clearTimeout(w),null!==t.data.data?l({data:t.data.data,cornerPoints:e._convertPoints(t.data.cornerPoints,m)}):v(e.NO_QR_CODE_FOUND))};r=t=>{g.removeEventListener("message",u);g.removeEventListener("error",r);clearTimeout(w);v("Scanner error: "+(t?
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t.message||t:"Unknown Error"))};g.addEventListener("message",u);g.addEventListener("error",r);w=setTimeout(()=>r("timeout"),1E4);let x=k.getImageData(0,0,d.width,d.height);y=e._postWorkerMessageSync(g,"decode",x,[x.data.buffer])})}else q=await Promise.race([new Promise((g,l)=>window.setTimeout(()=>l("Scanner error: timeout"),1E4)),(async()=>{try{var [g]=await c.detect(d);if(!g)throw e.NO_QR_CODE_FOUND;return{data:g.rawValue,cornerPoints:e._convertPoints(g.cornerPoints,m)}}catch(l){g=l.message||l;
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if(/not implemented|service unavailable/.test(g))return e._disableBarcodeDetector=!0,e.scanImage(a,{scanRegion:m,canvas:d,disallowCanvasResizing:f,alsoTryWithoutScanRegion:h});throw`Scanner error: ${g}`;}})()]);return n?q:q.data}catch(p){if(!m||!h)throw p;let k=await e.scanImage(a,{qrEngine:c,canvas:d,disallowCanvasResizing:f});return n?k:k.data}finally{b||e._postWorkerMessage(c,"close")}}setGrayscaleWeights(a,b,c,d=!0){e._postWorkerMessage(this._qrEnginePromise,"grayscaleWeights",{red:a,green:b,
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blue:c,useIntegerApproximation:d})}setInversionMode(a){e._postWorkerMessage(this._qrEnginePromise,"inversionMode",a)}static async createQrEngine(a){a&&console.warn("Specifying a worker path is not required and not supported anymore.");a=()=>import("./qr-scanner-worker.min.js").then(c=>c.createWorker());if(!(!e._disableBarcodeDetector&&"BarcodeDetector"in window&&BarcodeDetector.getSupportedFormats&&(await BarcodeDetector.getSupportedFormats()).includes("qr_code")))return a();let b=navigator.userAgentData;
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return b&&b.brands.some(({brand:c})=>/Chromium/i.test(c))&&/mac ?OS/i.test(b.platform)&&await b.getHighEntropyValues(["architecture","platformVersion"]).then(({architecture:c,platformVersion:d})=>/arm/i.test(c||"arm")&&13<=parseInt(d||"13")).catch(()=>!0)?a():new BarcodeDetector({formats:["qr_code"]})}_onPlay(){this._scanRegion=this._calculateScanRegion(this.$video);this._updateOverlay();this.$overlay&&(this.$overlay.style.display="");this._scanFrame()}_onLoadedMetaData(){this._scanRegion=this._calculateScanRegion(this.$video);
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this._updateOverlay()}_onVisibilityChange(){document.hidden?this.pause():this._active&&this.start()}_calculateScanRegion(a){let b=Math.round(2/3*Math.min(a.videoWidth,a.videoHeight));return{x:Math.round((a.videoWidth-b)/2),y:Math.round((a.videoHeight-b)/2),width:b,height:b,downScaledWidth:this._legacyCanvasSize,downScaledHeight:this._legacyCanvasSize}}_updateOverlay(){requestAnimationFrame(()=>{if(this.$overlay){var a=this.$video,b=a.videoWidth,c=a.videoHeight,d=a.offsetWidth,f=a.offsetHeight,h=a.offsetLeft,
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m=a.offsetTop,n=window.getComputedStyle(a),p=n.objectFit,k=b/c,q=d/f;switch(p){case "none":var g=b;var l=c;break;case "fill":g=d;l=f;break;default:("cover"===p?k>q:k<q)?(l=f,g=l*k):(g=d,l=g/k),"scale-down"===p&&(g=Math.min(g,b),l=Math.min(l,c))}var [v,w]=n.objectPosition.split(" ").map((r,y)=>{const x=parseFloat(r);return r.endsWith("%")?(y?f-l:d-g)*x/100:x});n=this._scanRegion.width||b;q=this._scanRegion.height||c;p=this._scanRegion.x||0;var u=this._scanRegion.y||0;k=this.$overlay.style;k.width=
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`${n/b*g}px`;k.height=`${q/c*l}px`;k.top=`${m+w+u/c*l}px`;c=/scaleX\(-1\)/.test(a.style.transform);k.left=`${h+(c?d-v-g:v)+(c?b-p-n:p)/b*g}px`;k.transform=a.style.transform}})}static _convertPoints(a,b){if(!b)return a;let c=b.x||0,d=b.y||0,f=b.width&&b.downScaledWidth?b.width/b.downScaledWidth:1;b=b.height&&b.downScaledHeight?b.height/b.downScaledHeight:1;for(let h of a)h.x=h.x*f+c,h.y=h.y*b+d;return a}_scanFrame(){!this._active||this.$video.paused||this.$video.ended||("requestVideoFrameCallback"in
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this.$video?this.$video.requestVideoFrameCallback.bind(this.$video):requestAnimationFrame)(async()=>{if(!(1>=this.$video.readyState)){var a=Date.now()-this._lastScanTimestamp,b=1E3/this._maxScansPerSecond;a<b&&await new Promise(d=>setTimeout(d,b-a));this._lastScanTimestamp=Date.now();try{var c=await e.scanImage(this.$video,{scanRegion:this._scanRegion,qrEngine:this._qrEnginePromise,canvas:this.$canvas})}catch(d){if(!this._active)return;this._onDecodeError(d)}!e._disableBarcodeDetector||await this._qrEnginePromise instanceof
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Worker||(this._qrEnginePromise=e.createQrEngine());c?(this._onDecode?this._onDecode(c):this._legacyOnDecode&&this._legacyOnDecode(c.data),this.$codeOutlineHighlight&&(clearTimeout(this._codeOutlineHighlightRemovalTimeout),this._codeOutlineHighlightRemovalTimeout=void 0,this.$codeOutlineHighlight.setAttribute("viewBox",`${this._scanRegion.x||0} `+`${this._scanRegion.y||0} `+`${this._scanRegion.width||this.$video.videoWidth} `+`${this._scanRegion.height||this.$video.videoHeight}`),this.$codeOutlineHighlight.firstElementChild.setAttribute("points",
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c.cornerPoints.map(({x:d,y:f})=>`${d},${f}`).join(" ")),this.$codeOutlineHighlight.style.display="")):this.$codeOutlineHighlight&&!this._codeOutlineHighlightRemovalTimeout&&(this._codeOutlineHighlightRemovalTimeout=setTimeout(()=>this.$codeOutlineHighlight.style.display="none",100))}this._scanFrame()})}_onDecodeError(a){a!==e.NO_QR_CODE_FOUND&&console.log(a)}async _getCameraStream(){if(!navigator.mediaDevices)throw"Camera not found.";let a=/^(environment|user)$/.test(this._preferredCamera)?"facingMode":
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"deviceId",b=[{width:{min:1024}},{width:{min:768}},{}],c=b.map(d=>Object.assign({},d,{[a]:{exact:this._preferredCamera}}));for(let d of[...c,...b])try{let f=await navigator.mediaDevices.getUserMedia({video:d,audio:!1}),h=this._getFacingMode(f)||(d.facingMode?this._preferredCamera:"environment"===this._preferredCamera?"user":"environment");return{stream:f,facingMode:h}}catch(f){}throw"Camera not found.";}async _restartVideoStream(){let a=this._paused;await this.pause(!0)&&!a&&this._active&&await this.start()}static _stopVideoStream(a){for(let b of a.getTracks())b.stop(),
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a.removeTrack(b)}_setVideoMirror(a){this.$video.style.transform="scaleX("+("user"===a?-1:1)+")"}_getFacingMode(a){return(a=a.getVideoTracks()[0])?/rear|back|environment/i.test(a.label)?"environment":/front|user|face/i.test(a.label)?"user":null:null}static _drawToCanvas(a,b,c,d=!1){c=c||document.createElement("canvas");let f=b&&b.x?b.x:0,h=b&&b.y?b.y:0,m=b&&b.width?b.width:a.videoWidth||a.width,n=b&&b.height?b.height:a.videoHeight||a.height;d||(d=b&&b.downScaledWidth?b.downScaledWidth:m,b=b&&b.downScaledHeight?
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b.downScaledHeight:n,c.width!==d&&(c.width=d),c.height!==b&&(c.height=b));b=c.getContext("2d",{alpha:!1});b.imageSmoothingEnabled=!1;b.drawImage(a,f,h,m,n,0,0,c.width,c.height);return[c,b]}static async _loadImage(a){if(a instanceof Image)return await e._awaitImageLoad(a),a;if(a instanceof HTMLVideoElement||a instanceof HTMLCanvasElement||a instanceof SVGImageElement||"OffscreenCanvas"in window&&a instanceof OffscreenCanvas||"ImageBitmap"in window&&a instanceof ImageBitmap)return a;if(a instanceof
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File||a instanceof Blob||a instanceof URL||"string"===typeof a){let b=new Image;b.src=a instanceof File||a instanceof Blob?URL.createObjectURL(a):a.toString();try{return await e._awaitImageLoad(b),b}finally{(a instanceof File||a instanceof Blob)&&URL.revokeObjectURL(b.src)}}else throw"Unsupported image type.";}static async _awaitImageLoad(a){a.complete&&0!==a.naturalWidth||await new Promise((b,c)=>{let d=f=>{a.removeEventListener("load",d);a.removeEventListener("error",d);f instanceof ErrorEvent?
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c("Image load error"):b()};a.addEventListener("load",d);a.addEventListener("error",d)})}static async _postWorkerMessage(a,b,c,d){return e._postWorkerMessageSync(await a,b,c,d)}static _postWorkerMessageSync(a,b,c,d){if(!(a instanceof Worker))return-1;let f=e._workerMessageId++;a.postMessage({id:f,type:b,data:c},d);return f}}e.DEFAULT_CANVAS_SIZE=400;e.NO_QR_CODE_FOUND="No QR code found";e._disableBarcodeDetector=!1;e._workerMessageId=0;return e})
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//# sourceMappingURL=qr-scanner.umd.min.js.map
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