mirror of
https://github.com/nimiq/qr-scanner.git
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Avoid that Safari stops the video stream on hidden videos
This commit is contained in:
Daniel
Vendored
+16
-15
@@ -1,17 +1,18 @@
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class e{static hasCamera(){return navigator.mediaDevices?navigator.mediaDevices.enumerateDevices().then(a=>a.some(a=>"videoinput"===a.kind)).catch(()=>!1):Promise.resolve(!1)}constructor(a,b,c=this._onDecodeError,d=this._calculateScanRegion,f="environment"){this.$video=a;this.$canvas=document.createElement("canvas");this._onDecode=b;this._legacyCanvasSize=e.DEFAULT_CANVAS_SIZE;this._preferredFacingMode=f;this._flashOn=this._paused=this._active=!1;"number"===typeof c?(this._legacyCanvasSize=
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class e{static hasCamera(){return navigator.mediaDevices?navigator.mediaDevices.enumerateDevices().then(a=>a.some(a=>"videoinput"===a.kind)).catch(()=>!1):Promise.resolve(!1)}constructor(a,b,c=this._onDecodeError,d=this._calculateScanRegion,g="environment"){this.$video=a;this.$canvas=document.createElement("canvas");this._onDecode=b;this._legacyCanvasSize=e.DEFAULT_CANVAS_SIZE;this._preferredFacingMode=g;this._flashOn=this._paused=this._active=!1;"number"===typeof c?(this._legacyCanvasSize=
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c,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._onDecodeError=c;"number"===typeof d?(this._legacyCanvasSize=d,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._calculateScanRegion=d;this._scanRegion=this._calculateScanRegion(a);this._onPlay=this._onPlay.bind(this);this._onLoadedMetaData=this._onLoadedMetaData.bind(this);this._onVisibilityChange=this._onVisibilityChange.bind(this);
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this.$video.playsInline=!0;this.$video.muted=!0;this.$video.disablePictureInPicture=!0;this.$video.addEventListener("play",this._onPlay);this.$video.addEventListener("loadedmetadata",this._onLoadedMetaData);document.addEventListener("visibilitychange",this._onVisibilityChange);this._qrEnginePromise=e.createQrEngine()}hasFlash(){if(!("ImageCapture"in window))return Promise.resolve(!1);let a=this.$video.srcObject?this.$video.srcObject.getVideoTracks()[0]:null;return a?(new ImageCapture(a)).getPhotoCapabilities().then(a=>
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a.fillLightMode.includes("flash")).catch(a=>{console.warn(a);return!1}):Promise.reject("Camera not started or not available")}isFlashOn(){return this._flashOn}toggleFlash(){return this._setFlash(!this._flashOn)}turnFlashOff(){return this._setFlash(!1)}turnFlashOn(){return this._setFlash(!0)}destroy(){this.$video.removeEventListener("loadedmetadata",this._onLoadedMetaData);this.$video.removeEventListener("play",this._onPlay);document.removeEventListener("visibilitychange",this._onVisibilityChange);
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this.stop();e._postWorkerMessage(this._qrEnginePromise,"close")}start(){if(this._active&&!this._paused)return Promise.resolve();"https:"!==window.location.protocol&&console.warn("The camera stream is only accessible if the page is transferred via https.");this._active=!0;this._paused=!1;if(document.hidden)return Promise.resolve();clearTimeout(this._offTimeout);this._offTimeout=null;if(this.$video.srcObject)return this.$video.play(),Promise.resolve();let a=this._preferredFacingMode;return this._getCameraStream(a,
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!0).catch(()=>{a="environment"===a?"user":"environment";return this._getCameraStream()}).then(b=>{a=this._getFacingMode(b)||a;this.$video.srcObject=b;this.$video.play();this._setVideoMirror(a)}).catch(a=>{this._active=!1;throw a;})}stop(){this.pause();this._active=!1}pause(){this._paused=!0;this._active&&(this.$video.pause(),this._offTimeout||(this._offTimeout=setTimeout(()=>{let a=this.$video.srcObject?this.$video.srcObject.getTracks():[];for(let b of a)b.stop();this._offTimeout=this.$video.srcObject=
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null},300)))}static scanImage(a,b=null,c=null,d=null,f=!1,k=!1){let h=c instanceof Worker,g=Promise.all([c||e.createQrEngine(),e._loadImage(a)]).then(([a,g])=>{c=a;let k;[d,k]=this._drawToCanvas(g,b,d,f);return c instanceof Worker?(h||c.postMessage({type:"inversionMode",data:"both"}),new Promise((a,b)=>{let f,l,g;l=d=>{"qrResult"===d.data.type&&(c.removeEventListener("message",l),c.removeEventListener("error",g),clearTimeout(f),null!==d.data.data?a(d.data.data):b(e.NO_QR_CODE_FOUND))};g=a=>{c.removeEventListener("message",
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l);c.removeEventListener("error",g);clearTimeout(f);b("Scanner error: "+(a?a.message||a:"Unknown Error"))};c.addEventListener("message",l);c.addEventListener("error",g);f=setTimeout(()=>g("timeout"),1E4);let h=k.getImageData(0,0,d.width,d.height);c.postMessage({type:"decode",data:h},[h.data.buffer])})):new Promise((a,b)=>{let f=setTimeout(()=>b("Scanner error: timeout"),1E4);c.detect(d).then(c=>{c.length?a(c[0].rawValue):b(e.NO_QR_CODE_FOUND)}).catch(a=>b("Scanner error: "+(a.message||a))).finally(()=>
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clearTimeout(f))})});b&&k&&(g=g.catch(()=>e.scanImage(a,null,c,d,f)));return g=g.finally(()=>{h||e._postWorkerMessage(c,"close")})}setGrayscaleWeights(a,b,c,d=!0){e._postWorkerMessage(this._qrEnginePromise,"grayscaleWeights",{red:a,green:b,blue:c,useIntegerApproximation:d})}setInversionMode(a){e._postWorkerMessage(this._qrEnginePromise,"inversionMode",a)}static createQrEngine(a=e.WORKER_PATH){return("BarcodeDetector"in window?BarcodeDetector.getSupportedFormats():Promise.resolve([])).then(b=>-1!==
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b.indexOf("qr_code")?new BarcodeDetector({formats:["qr_code"]}):new Worker(a))}_onPlay(){this._scanRegion=this._calculateScanRegion(this.$video);this._scanFrame()}_onLoadedMetaData(){this._scanRegion=this._calculateScanRegion(this.$video)}_onVisibilityChange(){document.hidden?this.pause():this._active&&this.start()}_calculateScanRegion(a){let b=Math.round(2/3*Math.min(a.videoWidth,a.videoHeight));return{x:Math.round((a.videoWidth-b)/2),y:Math.round((a.videoHeight-b)/2),width:b,height:b,downScaledWidth:this._legacyCanvasSize,
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downScaledHeight:this._legacyCanvasSize}}_scanFrame(){if(!this._active||this.$video.paused||this.$video.ended)return!1;requestAnimationFrame(()=>{1>=this.$video.readyState?this._scanFrame():this._qrEnginePromise.then(a=>e.scanImage(this.$video,this._scanRegion,a,this.$canvas)).then(this._onDecode,a=>{this._active&&(-1!==(a.message||a).indexOf("service unavailable")&&(this._qrEnginePromise=e.createQrEngine()),this._onDecodeError(a))}).then(()=>this._scanFrame())})}_onDecodeError(a){a!==e.NO_QR_CODE_FOUND&&
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console.log(a)}_getCameraStream(a,b=!1){let c=[{width:{min:1024}},{width:{min:768}},{}];a&&(b&&(a={exact:a}),c.forEach(b=>b.facingMode=a));return this._getMatchingCameraStream(c)}_getMatchingCameraStream(a){return navigator.mediaDevices&&0!==a.length?navigator.mediaDevices.getUserMedia({video:a.shift()}).catch(()=>this._getMatchingCameraStream(a)):Promise.reject("Camera not found.")}_setFlash(a){return this.hasFlash().then(b=>b?this.$video.srcObject.getVideoTracks()[0].applyConstraints({advanced:[{torch:a}]}):
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Promise.reject("No flash available")).then(()=>this._flashOn=a)}_setVideoMirror(a){this.$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=null,c=null,d=!1){c=c||document.createElement("canvas");let f=b&&b.x?b.x:0,k=b&&b.y?b.y:0,h=b&&b.width?b.width:a.width||a.videoWidth,g=b&&b.height?b.height:a.height||a.videoHeight;
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d||(d=b&&b.downScaledWidth?b.downScaledWidth:h,b=b&&b.downScaledHeight?b.downScaledHeight:g,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,k,h,g,0,0,c.width,c.height);return[c,b]}static _loadImage(a){if(a instanceof HTMLCanvasElement||a instanceof HTMLVideoElement||window.ImageBitmap&&a instanceof window.ImageBitmap||window.OffscreenCanvas&&a instanceof window.OffscreenCanvas)return Promise.resolve(a);if(a instanceof
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Image)return e._awaitImageLoad(a).then(()=>a);if(a instanceof 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;return e._awaitImageLoad(b).then(()=>{(a instanceof File||a instanceof Blob)&&URL.revokeObjectURL(b.src);return b})}return Promise.reject("Unsupported image type.")}static _awaitImageLoad(a){return new Promise((b,c)=>{if(a.complete&&0!==a.naturalWidth)b();else{let d,f;d=()=>{a.removeEventListener("load",
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d);a.removeEventListener("error",f);b()};f=()=>{a.removeEventListener("load",d);a.removeEventListener("error",f);c("Image load error")};a.addEventListener("load",d);a.addEventListener("error",f)}})}static _postWorkerMessage(a,b,c){return Promise.resolve(a).then(a=>{a instanceof Worker&&a.postMessage({type:b,data:c})})}}e.DEFAULT_CANVAS_SIZE=400;e.NO_QR_CODE_FOUND="No QR code found";e.WORKER_PATH="qr-scanner-worker.min.js";export default e
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a.disablePictureInPicture=!0;a.playsInline=!0;a.muted=!0;let f=!1;a.hidden&&(a.hidden=!1,f=!0);document.body.contains(a)||(document.body.appendChild(a),f=!0);requestAnimationFrame(()=>{let b=window.getComputedStyle(a);"none"===b.display&&(a.style.setProperty("display","block","important"),f=!0);"visible"!==b.visibility&&(a.style.setProperty("visibility","visible","important"),f=!0);f&&(console.warn("QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."),a.style.opacity=
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0,a.style.width=0,a.style.height=0)});a.addEventListener("play",this._onPlay);a.addEventListener("loadedmetadata",this._onLoadedMetaData);document.addEventListener("visibilitychange",this._onVisibilityChange);this._qrEnginePromise=e.createQrEngine()}hasFlash(){if(!("ImageCapture"in window))return Promise.resolve(!1);let a=this.$video.srcObject?this.$video.srcObject.getVideoTracks()[0]:null;return a?(new ImageCapture(a)).getPhotoCapabilities().then(a=>a.fillLightMode.includes("flash")).catch(a=>{console.warn(a);
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return!1}):Promise.reject("Camera not started or not available")}isFlashOn(){return this._flashOn}toggleFlash(){return this._setFlash(!this._flashOn)}turnFlashOff(){return this._setFlash(!1)}turnFlashOn(){return this._setFlash(!0)}destroy(){this.$video.removeEventListener("loadedmetadata",this._onLoadedMetaData);this.$video.removeEventListener("play",this._onPlay);document.removeEventListener("visibilitychange",this._onVisibilityChange);this.stop();e._postWorkerMessage(this._qrEnginePromise,"close")}start(){if(this._active&&
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!this._paused)return Promise.resolve();"https:"!==window.location.protocol&&console.warn("The camera stream is only accessible if the page is transferred via https.");this._active=!0;this._paused=!1;if(document.hidden)return Promise.resolve();clearTimeout(this._offTimeout);this._offTimeout=null;if(this.$video.srcObject)return this.$video.play(),Promise.resolve();let a=this._preferredFacingMode;return this._getCameraStream(a,!0).catch(()=>{a="environment"===a?"user":"environment";return this._getCameraStream()}).then(b=>
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{a=this._getFacingMode(b)||a;this.$video.srcObject=b;this.$video.play();this._setVideoMirror(a)}).catch(a=>{this._active=!1;throw a;})}stop(){this.pause();this._active=!1}pause(){this._paused=!0;this._active&&(this.$video.pause(),this._offTimeout||(this._offTimeout=setTimeout(()=>{let a=this.$video.srcObject?this.$video.srcObject.getTracks():[];for(let b of a)b.stop();this._offTimeout=this.$video.srcObject=null},300)))}static scanImage(a,b=null,c=null,d=null,g=!1,f=!1){let h=c instanceof Worker,k=
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Promise.all([c||e.createQrEngine(),e._loadImage(a)]).then(([a,f])=>{c=a;let k;[d,k]=this._drawToCanvas(f,b,d,g);return c instanceof Worker?(h||c.postMessage({type:"inversionMode",data:"both"}),new Promise((a,b)=>{let g,f,h;f=d=>{"qrResult"===d.data.type&&(c.removeEventListener("message",f),c.removeEventListener("error",h),clearTimeout(g),null!==d.data.data?a(d.data.data):b(e.NO_QR_CODE_FOUND))};h=a=>{c.removeEventListener("message",f);c.removeEventListener("error",h);clearTimeout(g);b("Scanner error: "+
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(a?a.message||a:"Unknown Error"))};c.addEventListener("message",f);c.addEventListener("error",h);g=setTimeout(()=>h("timeout"),1E4);let l=k.getImageData(0,0,d.width,d.height);c.postMessage({type:"decode",data:l},[l.data.buffer])})):new Promise((a,b)=>{let f=setTimeout(()=>b("Scanner error: timeout"),1E4);c.detect(d).then(c=>{c.length?a(c[0].rawValue):b(e.NO_QR_CODE_FOUND)}).catch(a=>b("Scanner error: "+(a.message||a))).finally(()=>clearTimeout(f))})});b&&f&&(k=k.catch(()=>e.scanImage(a,null,c,d,g)));
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return k=k.finally(()=>{h||e._postWorkerMessage(c,"close")})}setGrayscaleWeights(a,b,c,d=!0){e._postWorkerMessage(this._qrEnginePromise,"grayscaleWeights",{red:a,green:b,blue:c,useIntegerApproximation:d})}setInversionMode(a){e._postWorkerMessage(this._qrEnginePromise,"inversionMode",a)}static createQrEngine(a=e.WORKER_PATH){return("BarcodeDetector"in window?BarcodeDetector.getSupportedFormats():Promise.resolve([])).then(b=>-1!==b.indexOf("qr_code")?new BarcodeDetector({formats:["qr_code"]}):new Worker(a))}_onPlay(){this._scanRegion=
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this._calculateScanRegion(this.$video);this._scanFrame()}_onLoadedMetaData(){this._scanRegion=this._calculateScanRegion(this.$video)}_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}}_scanFrame(){if(!this._active||this.$video.paused||
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this.$video.ended)return!1;requestAnimationFrame(()=>{1>=this.$video.readyState?this._scanFrame():this._qrEnginePromise.then(a=>e.scanImage(this.$video,this._scanRegion,a,this.$canvas)).then(this._onDecode,a=>{this._active&&(-1!==(a.message||a).indexOf("service unavailable")&&(this._qrEnginePromise=e.createQrEngine()),this._onDecodeError(a))}).then(()=>this._scanFrame())})}_onDecodeError(a){a!==e.NO_QR_CODE_FOUND&&console.log(a)}_getCameraStream(a,b=!1){let c=[{width:{min:1024}},{width:{min:768}},
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{}];a&&(b&&(a={exact:a}),c.forEach(b=>b.facingMode=a));return this._getMatchingCameraStream(c)}_getMatchingCameraStream(a){return navigator.mediaDevices&&0!==a.length?navigator.mediaDevices.getUserMedia({video:a.shift()}).catch(()=>this._getMatchingCameraStream(a)):Promise.reject("Camera not found.")}_setFlash(a){return this.hasFlash().then(b=>b?this.$video.srcObject.getVideoTracks()[0].applyConstraints({advanced:[{torch:a}]}):Promise.reject("No flash available")).then(()=>this._flashOn=a)}_setVideoMirror(a){this.$video.style.transform=
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"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=null,c=null,d=!1){c=c||document.createElement("canvas");let g=b&&b.x?b.x:0,f=b&&b.y?b.y:0,h=b&&b.width?b.width:a.width||a.videoWidth,k=b&&b.height?b.height:a.height||a.videoHeight;d||(d=b&&b.downScaledWidth?b.downScaledWidth:h,b=b&&b.downScaledHeight?b.downScaledHeight:k,c.width!==d&&(c.width=
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d),c.height!==b&&(c.height=b));b=c.getContext("2d",{alpha:!1});b.imageSmoothingEnabled=!1;b.drawImage(a,g,f,h,k,0,0,c.width,c.height);return[c,b]}static _loadImage(a){if(a instanceof HTMLCanvasElement||a instanceof HTMLVideoElement||window.ImageBitmap&&a instanceof window.ImageBitmap||window.OffscreenCanvas&&a instanceof window.OffscreenCanvas)return Promise.resolve(a);if(a instanceof Image)return e._awaitImageLoad(a).then(()=>a);if(a instanceof File||a instanceof Blob||a instanceof URL||"string"===
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typeof a){let b=new Image;b.src=a instanceof File||a instanceof Blob?URL.createObjectURL(a):a;return e._awaitImageLoad(b).then(()=>{(a instanceof File||a instanceof Blob)&&URL.revokeObjectURL(b.src);return b})}return Promise.reject("Unsupported image type.")}static _awaitImageLoad(a){return new Promise((b,c)=>{if(a.complete&&0!==a.naturalWidth)b();else{let d,g;d=()=>{a.removeEventListener("load",d);a.removeEventListener("error",g);b()};g=()=>{a.removeEventListener("load",d);a.removeEventListener("error",
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g);c("Image load error")};a.addEventListener("load",d);a.addEventListener("error",g)}})}static _postWorkerMessage(a,b,c){return Promise.resolve(a).then(a=>{a instanceof Worker&&a.postMessage({type:b,data:c})})}}e.DEFAULT_CANVAS_SIZE=400;e.NO_QR_CODE_FOUND="No QR code found";e.WORKER_PATH="qr-scanner-worker.min.js";export default e
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//# sourceMappingURL=qr-scanner.min.js.map
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Vendored
+12
-11
@@ -1,17 +1,18 @@
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'use strict';(function(d,a){"object"===typeof exports&&"undefined"!==typeof module?module.exports=a():"function"===typeof define&&define.amd?define(a):(d=d||self,d.QrScanner=a())})(this,function(){class d{static hasCamera(){return navigator.mediaDevices?navigator.mediaDevices.enumerateDevices().then(a=>a.some(a=>"videoinput"===a.kind)).catch(()=>!1):Promise.resolve(!1)}constructor(a,b,c=this._onDecodeError,e=this._calculateScanRegion,g="environment"){this.$video=a;this.$canvas=document.createElement("canvas");
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this._onDecode=b;this._legacyCanvasSize=d.DEFAULT_CANVAS_SIZE;this._preferredFacingMode=g;this._flashOn=this._paused=this._active=!1;"number"===typeof c?(this._legacyCanvasSize=c,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._onDecodeError=c;"number"===typeof e?(this._legacyCanvasSize=e,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._calculateScanRegion=
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e;this._scanRegion=this._calculateScanRegion(a);this._onPlay=this._onPlay.bind(this);this._onLoadedMetaData=this._onLoadedMetaData.bind(this);this._onVisibilityChange=this._onVisibilityChange.bind(this);this.$video.playsInline=!0;this.$video.muted=!0;this.$video.disablePictureInPicture=!0;this.$video.addEventListener("play",this._onPlay);this.$video.addEventListener("loadedmetadata",this._onLoadedMetaData);document.addEventListener("visibilitychange",this._onVisibilityChange);this._qrEnginePromise=
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d.createQrEngine()}hasFlash(){if(!("ImageCapture"in window))return Promise.resolve(!1);let a=this.$video.srcObject?this.$video.srcObject.getVideoTracks()[0]:null;return a?(new ImageCapture(a)).getPhotoCapabilities().then(a=>a.fillLightMode.includes("flash")).catch(a=>{console.warn(a);return!1}):Promise.reject("Camera not started or not available")}isFlashOn(){return this._flashOn}toggleFlash(){return this._setFlash(!this._flashOn)}turnFlashOff(){return this._setFlash(!1)}turnFlashOn(){return this._setFlash(!0)}destroy(){this.$video.removeEventListener("loadedmetadata",
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this._onLoadedMetaData);this.$video.removeEventListener("play",this._onPlay);document.removeEventListener("visibilitychange",this._onVisibilityChange);this.stop();d._postWorkerMessage(this._qrEnginePromise,"close")}start(){if(this._active&&!this._paused)return Promise.resolve();"https:"!==window.location.protocol&&console.warn("The camera stream is only accessible if the page is transferred via https.");this._active=!0;this._paused=!1;if(document.hidden)return Promise.resolve();clearTimeout(this._offTimeout);
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this._offTimeout=null;if(this.$video.srcObject)return this.$video.play(),Promise.resolve();let a=this._preferredFacingMode;return this._getCameraStream(a,!0).catch(()=>{a="environment"===a?"user":"environment";return this._getCameraStream()}).then(b=>{a=this._getFacingMode(b)||a;this.$video.srcObject=b;this.$video.play();this._setVideoMirror(a)}).catch(a=>{this._active=!1;throw a;})}stop(){this.pause();this._active=!1}pause(){this._paused=!0;this._active&&(this.$video.pause(),this._offTimeout||(this._offTimeout=
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setTimeout(()=>{let a=this.$video.srcObject?this.$video.srcObject.getTracks():[];for(let b of a)b.stop();this._offTimeout=this.$video.srcObject=null},300)))}static scanImage(a,b=null,c=null,e=null,g=!1,k=!1){let h=c instanceof Worker,f=Promise.all([c||d.createQrEngine(),d._loadImage(a)]).then(([a,f])=>{c=a;let k;[e,k]=this._drawToCanvas(f,b,e,g);return c instanceof Worker?(h||c.postMessage({type:"inversionMode",data:"both"}),new Promise((a,b)=>{let g,l,f;l=e=>{"qrResult"===e.data.type&&(c.removeEventListener("message",
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l),c.removeEventListener("error",f),clearTimeout(g),null!==e.data.data?a(e.data.data):b(d.NO_QR_CODE_FOUND))};f=a=>{c.removeEventListener("message",l);c.removeEventListener("error",f);clearTimeout(g);b("Scanner error: "+(a?a.message||a:"Unknown Error"))};c.addEventListener("message",l);c.addEventListener("error",f);g=setTimeout(()=>f("timeout"),1E4);let h=k.getImageData(0,0,e.width,e.height);c.postMessage({type:"decode",data:h},[h.data.buffer])})):new Promise((a,b)=>{let g=setTimeout(()=>b("Scanner error: timeout"),
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1E4);c.detect(e).then(c=>{c.length?a(c[0].rawValue):b(d.NO_QR_CODE_FOUND)}).catch(a=>b("Scanner error: "+(a.message||a))).finally(()=>clearTimeout(g))})});b&&k&&(f=f.catch(()=>d.scanImage(a,null,c,e,g)));return f=f.finally(()=>{h||d._postWorkerMessage(c,"close")})}setGrayscaleWeights(a,b,c,e=!0){d._postWorkerMessage(this._qrEnginePromise,"grayscaleWeights",{red:a,green:b,blue:c,useIntegerApproximation:e})}setInversionMode(a){d._postWorkerMessage(this._qrEnginePromise,"inversionMode",a)}static createQrEngine(a=
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'use strict';(function(d,a){"object"===typeof exports&&"undefined"!==typeof module?module.exports=a():"function"===typeof define&&define.amd?define(a):(d=d||self,d.QrScanner=a())})(this,function(){class d{static hasCamera(){return navigator.mediaDevices?navigator.mediaDevices.enumerateDevices().then(a=>a.some(a=>"videoinput"===a.kind)).catch(()=>!1):Promise.resolve(!1)}constructor(a,b,c=this._onDecodeError,e=this._calculateScanRegion,k="environment"){this.$video=a;this.$canvas=document.createElement("canvas");
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this._onDecode=b;this._legacyCanvasSize=d.DEFAULT_CANVAS_SIZE;this._preferredFacingMode=k;this._flashOn=this._paused=this._active=!1;"number"===typeof c?(this._legacyCanvasSize=c,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._onDecodeError=c;"number"===typeof e?(this._legacyCanvasSize=e,console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future")):this._calculateScanRegion=
|
||||
e;this._scanRegion=this._calculateScanRegion(a);this._onPlay=this._onPlay.bind(this);this._onLoadedMetaData=this._onLoadedMetaData.bind(this);this._onVisibilityChange=this._onVisibilityChange.bind(this);a.disablePictureInPicture=!0;a.playsInline=!0;a.muted=!0;let f=!1;a.hidden&&(a.hidden=!1,f=!0);document.body.contains(a)||(document.body.appendChild(a),f=!0);requestAnimationFrame(()=>{let b=window.getComputedStyle(a);"none"===b.display&&(a.style.setProperty("display","block","important"),f=!0);"visible"!==
|
||||
b.visibility&&(a.style.setProperty("visibility","visible","important"),f=!0);f&&(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)});a.addEventListener("play",this._onPlay);a.addEventListener("loadedmetadata",this._onLoadedMetaData);document.addEventListener("visibilitychange",this._onVisibilityChange);this._qrEnginePromise=d.createQrEngine()}hasFlash(){if(!("ImageCapture"in window))return Promise.resolve(!1);
|
||||
let a=this.$video.srcObject?this.$video.srcObject.getVideoTracks()[0]:null;return a?(new ImageCapture(a)).getPhotoCapabilities().then(a=>a.fillLightMode.includes("flash")).catch(a=>{console.warn(a);return!1}):Promise.reject("Camera not started or not available")}isFlashOn(){return this._flashOn}toggleFlash(){return this._setFlash(!this._flashOn)}turnFlashOff(){return this._setFlash(!1)}turnFlashOn(){return this._setFlash(!0)}destroy(){this.$video.removeEventListener("loadedmetadata",this._onLoadedMetaData);
|
||||
this.$video.removeEventListener("play",this._onPlay);document.removeEventListener("visibilitychange",this._onVisibilityChange);this.stop();d._postWorkerMessage(this._qrEnginePromise,"close")}start(){if(this._active&&!this._paused)return Promise.resolve();"https:"!==window.location.protocol&&console.warn("The camera stream is only accessible if the page is transferred via https.");this._active=!0;this._paused=!1;if(document.hidden)return Promise.resolve();clearTimeout(this._offTimeout);this._offTimeout=
|
||||
null;if(this.$video.srcObject)return this.$video.play(),Promise.resolve();let a=this._preferredFacingMode;return this._getCameraStream(a,!0).catch(()=>{a="environment"===a?"user":"environment";return this._getCameraStream()}).then(b=>{a=this._getFacingMode(b)||a;this.$video.srcObject=b;this.$video.play();this._setVideoMirror(a)}).catch(a=>{this._active=!1;throw a;})}stop(){this.pause();this._active=!1}pause(){this._paused=!0;this._active&&(this.$video.pause(),this._offTimeout||(this._offTimeout=setTimeout(()=>
|
||||
{let a=this.$video.srcObject?this.$video.srcObject.getTracks():[];for(let b of a)b.stop();this._offTimeout=this.$video.srcObject=null},300)))}static scanImage(a,b=null,c=null,e=null,k=!1,f=!1){let g=c instanceof Worker,h=Promise.all([c||d.createQrEngine(),d._loadImage(a)]).then(([a,f])=>{c=a;let h;[e,h]=this._drawToCanvas(f,b,e,k);return c instanceof Worker?(g||c.postMessage({type:"inversionMode",data:"both"}),new Promise((a,b)=>{let k,f,g;f=e=>{"qrResult"===e.data.type&&(c.removeEventListener("message",
|
||||
f),c.removeEventListener("error",g),clearTimeout(k),null!==e.data.data?a(e.data.data):b(d.NO_QR_CODE_FOUND))};g=a=>{c.removeEventListener("message",f);c.removeEventListener("error",g);clearTimeout(k);b("Scanner error: "+(a?a.message||a:"Unknown Error"))};c.addEventListener("message",f);c.addEventListener("error",g);k=setTimeout(()=>g("timeout"),1E4);let l=h.getImageData(0,0,e.width,e.height);c.postMessage({type:"decode",data:l},[l.data.buffer])})):new Promise((a,b)=>{let f=setTimeout(()=>b("Scanner error: timeout"),
|
||||
1E4);c.detect(e).then(c=>{c.length?a(c[0].rawValue):b(d.NO_QR_CODE_FOUND)}).catch(a=>b("Scanner error: "+(a.message||a))).finally(()=>clearTimeout(f))})});b&&f&&(h=h.catch(()=>d.scanImage(a,null,c,e,k)));return h=h.finally(()=>{g||d._postWorkerMessage(c,"close")})}setGrayscaleWeights(a,b,c,e=!0){d._postWorkerMessage(this._qrEnginePromise,"grayscaleWeights",{red:a,green:b,blue:c,useIntegerApproximation:e})}setInversionMode(a){d._postWorkerMessage(this._qrEnginePromise,"inversionMode",a)}static createQrEngine(a=
|
||||
d.WORKER_PATH){return("BarcodeDetector"in window?BarcodeDetector.getSupportedFormats():Promise.resolve([])).then(b=>-1!==b.indexOf("qr_code")?new BarcodeDetector({formats:["qr_code"]}):new Worker(a))}_onPlay(){this._scanRegion=this._calculateScanRegion(this.$video);this._scanFrame()}_onLoadedMetaData(){this._scanRegion=this._calculateScanRegion(this.$video)}_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}}_scanFrame(){if(!this._active||this.$video.paused||this.$video.ended)return!1;requestAnimationFrame(()=>{1>=this.$video.readyState?this._scanFrame():this._qrEnginePromise.then(a=>d.scanImage(this.$video,this._scanRegion,a,this.$canvas)).then(this._onDecode,a=>{this._active&&(-1!==(a.message||a).indexOf("service unavailable")&&
|
||||
(this._qrEnginePromise=d.createQrEngine()),this._onDecodeError(a))}).then(()=>this._scanFrame())})}_onDecodeError(a){a!==d.NO_QR_CODE_FOUND&&console.log(a)}_getCameraStream(a,b=!1){let c=[{width:{min:1024}},{width:{min:768}},{}];a&&(b&&(a={exact:a}),c.forEach(b=>b.facingMode=a));return this._getMatchingCameraStream(c)}_getMatchingCameraStream(a){return navigator.mediaDevices&&0!==a.length?navigator.mediaDevices.getUserMedia({video:a.shift()}).catch(()=>this._getMatchingCameraStream(a)):Promise.reject("Camera not found.")}_setFlash(a){return this.hasFlash().then(b=>
|
||||
b?this.$video.srcObject.getVideoTracks()[0].applyConstraints({advanced:[{torch:a}]}):Promise.reject("No flash available")).then(()=>this._flashOn=a)}_setVideoMirror(a){this.$video.style.transform="scaleX("+("user"===a?-1:1)+")"}_getFacingMode(a){return(a=a.getVideoTracks()[0])?/rear|back|environment/i.test(a.label)?"environment":/front|user|face/i.test(a.label)?"user":null:null}static _drawToCanvas(a,b=null,c=null,e=!1){c=c||document.createElement("canvas");let d=b&&b.x?b.x:0,k=b&&b.y?b.y:0,h=b&&
|
||||
b.width?b.width:a.width||a.videoWidth,f=b&&b.height?b.height:a.height||a.videoHeight;e||(e=b&&b.downScaledWidth?b.downScaledWidth:h,b=b&&b.downScaledHeight?b.downScaledHeight:f,c.width!==e&&(c.width=e),c.height!==b&&(c.height=b));b=c.getContext("2d",{alpha:!1});b.imageSmoothingEnabled=!1;b.drawImage(a,d,k,h,f,0,0,c.width,c.height);return[c,b]}static _loadImage(a){if(a instanceof HTMLCanvasElement||a instanceof HTMLVideoElement||window.ImageBitmap&&a instanceof window.ImageBitmap||window.OffscreenCanvas&&
|
||||
b?this.$video.srcObject.getVideoTracks()[0].applyConstraints({advanced:[{torch:a}]}):Promise.reject("No flash available")).then(()=>this._flashOn=a)}_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=null,c=null,e=!1){c=c||document.createElement("canvas");let d=b&&b.x?b.x:0,f=b&&b.y?b.y:0,g=b&&
|
||||
b.width?b.width:a.width||a.videoWidth,h=b&&b.height?b.height:a.height||a.videoHeight;e||(e=b&&b.downScaledWidth?b.downScaledWidth:g,b=b&&b.downScaledHeight?b.downScaledHeight:h,c.width!==e&&(c.width=e),c.height!==b&&(c.height=b));b=c.getContext("2d",{alpha:!1});b.imageSmoothingEnabled=!1;b.drawImage(a,d,f,g,h,0,0,c.width,c.height);return[c,b]}static _loadImage(a){if(a instanceof HTMLCanvasElement||a instanceof HTMLVideoElement||window.ImageBitmap&&a instanceof window.ImageBitmap||window.OffscreenCanvas&&
|
||||
a instanceof window.OffscreenCanvas)return Promise.resolve(a);if(a instanceof Image)return d._awaitImageLoad(a).then(()=>a);if(a instanceof 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;return d._awaitImageLoad(b).then(()=>{(a instanceof File||a instanceof Blob)&&URL.revokeObjectURL(b.src);return b})}return Promise.reject("Unsupported image type.")}static _awaitImageLoad(a){return new Promise((b,
|
||||
c)=>{if(a.complete&&0!==a.naturalWidth)b();else{let e,d;e=()=>{a.removeEventListener("load",e);a.removeEventListener("error",d);b()};d=()=>{a.removeEventListener("load",e);a.removeEventListener("error",d);c("Image load error")};a.addEventListener("load",e);a.addEventListener("error",d)}})}static _postWorkerMessage(a,b,c){return Promise.resolve(a).then(a=>{a instanceof Worker&&a.postMessage({type:b,data:c})})}}d.DEFAULT_CANVAS_SIZE=400;d.NO_QR_CODE_FOUND="No QR code found";d.WORKER_PATH="qr-scanner-worker.min.js";
|
||||
return d})
|
||||
|
||||
File diff suppressed because one or more lines are too long
+37
-5
@@ -50,15 +50,47 @@ export default class QrScanner {
|
||||
this._onLoadedMetaData = this._onLoadedMetaData.bind(this);
|
||||
this._onVisibilityChange = this._onVisibilityChange.bind(this);
|
||||
|
||||
video.disablePictureInPicture = true;
|
||||
// Allow inline playback on iPhone instead of requiring full screen playback,
|
||||
// see https://webkit.org/blog/6784/new-video-policies-for-ios/
|
||||
this.$video.playsInline = true;
|
||||
video.playsInline = true;
|
||||
// Allow play() on iPhone without requiring a user gesture. Should not really be needed as camera stream
|
||||
// includes no audio, but just to be safe.
|
||||
this.$video.muted = true;
|
||||
this.$video.disablePictureInPicture = true;
|
||||
this.$video.addEventListener('play', this._onPlay);
|
||||
this.$video.addEventListener('loadedmetadata', this._onLoadedMetaData);
|
||||
video.muted = true;
|
||||
|
||||
// Avoid Safari stopping the video stream on a hidden video.
|
||||
// See https://github.com/cozmo/jsQR/issues/185
|
||||
let shouldHideVideo = false;
|
||||
if (video.hidden) {
|
||||
video.hidden = false;
|
||||
shouldHideVideo = true;
|
||||
}
|
||||
if (!document.body.contains(video)) {
|
||||
document.body.appendChild(video);
|
||||
shouldHideVideo = true;
|
||||
}
|
||||
requestAnimationFrame(() => {
|
||||
// Checking in requestAnimationFrame which should avoid a potential additional re-flow for getComputedStyle.
|
||||
const computedStyle = window.getComputedStyle(video);
|
||||
if (computedStyle.display === 'none') {
|
||||
video.style.setProperty('display', 'block', 'important');
|
||||
shouldHideVideo = true;
|
||||
}
|
||||
if (computedStyle.visibility !== 'visible') {
|
||||
video.style.setProperty('visibility', 'visible', 'important');
|
||||
shouldHideVideo = true;
|
||||
}
|
||||
if (shouldHideVideo) {
|
||||
// Hide the video in a way that doesn't cause Safari to stop the playback.
|
||||
console.warn('QrScanner has overwritten the video hiding style to avoid Safari stopping the playback.');
|
||||
video.style.opacity = 0;
|
||||
video.style.width = 0;
|
||||
video.style.height = 0;
|
||||
}
|
||||
});
|
||||
|
||||
video.addEventListener('play', this._onPlay);
|
||||
video.addEventListener('loadedmetadata', this._onLoadedMetaData);
|
||||
document.addEventListener('visibilitychange', this._onVisibilityChange);
|
||||
|
||||
this._qrEnginePromise = QrScanner.createQrEngine();
|
||||
|
||||
Reference in New Issue
Block a user