brotherton-erpnext/erpnext/selling/page/point_of_sale/onscan.js

!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t()):e.onScan=t()}(this,function(){var d={attachTo:function(e,t){if(void 0!==e.scannerDetectionData)throw new Error("onScan.js is already initialized for DOM element "+e);var n={onScan:function(e,t){},onScanError:function(e){},onKeyProcess:function(e,t){},onKeyDetect:function(e,t){},onPaste:function(e,t){},keyCodeMapper:function(e){return d.decodeKeyEvent(e)},onScanButtonLongPress:function(){},scanButtonKeyCode:!1,scanButtonLongPressTime:500,timeBeforeScanTest:100,avgTimeByChar:30,minLength:6,suffixKeyCodes:[9,13],prefixKeyCodes:[],ignoreIfFocusOn:!1,stopPropagation:!1,preventDefault:!1,captureEvents:!1,reactToKeydown:!0,reactToPaste:!1,singleScanQty:1};return t=this._mergeOptions(n,t),e.scannerDetectionData={options:t,vars:{firstCharTime:0,lastCharTime:0,accumulatedString:"",testTimer:!1,longPressTimeStart:0,longPressed:!1}},!0===t.reactToPaste&&e.addEventListener("paste",this._handlePaste,t.captureEvents),!1!==t.scanButtonKeyCode&&e.addEventListener("keyup",this._handleKeyUp,t.captureEvents),!0!==t.reactToKeydown&&!1===t.scanButtonKeyCode||e.addEventListener("keydown",this._handleKeyDown,t.captureEvents),this},detachFrom:function(e){e.scannerDetectionData.options.reactToPaste&&e.removeEventListener("paste",this._handlePaste),!1!==e.scannerDetectionData.options.scanButtonKeyCode&&e.removeEventListener("keyup",this._handleKeyUp),e.removeEventListener("keydown",this._handleKeyDown),e.scannerDetectionData=void 0},getOptions:function(e){return e.scannerDetectionData.options},setOptions:function(e,t){switch(e.scannerDetectionData.options.reactToPaste){case!0:!1===t.reactToPaste&&e.removeEventListener("paste",this._handlePaste);break;case!1:!0===t.reactToPaste&&e.addEventListener("paste",this._handlePaste)}switch(e.scannerDetectionData.options.scanButtonKeyCode){case!1:!1!==t.scanButtonKeyCode&&e.addEventListener("keyup",this._handleKeyUp);break;default:!1===t.scanButtonKeyCode&&e.removeEventListener("keyup",this._handleKeyUp)}return e.scannerDetectionData.options=this._mergeOptions(e.scannerDetectionData.options,t),this._reinitialize(e),this},decodeKeyEvent:function(e){var t=this._getNormalizedKeyNum(e);switch(!0){case 48<=t&&t<=90:case 106<=t&&t<=111:if(void 0!==e.key&&""!==e.key)return e.key;var n=String.fromCharCode(t);switch(e.shiftKey){case!1:n=n.toLowerCase();break;case!0:n=n.toUpperCase()}return n;case 96<=t&&t<=105:return t-96}return""},simulate:function(e,t){return this._reinitialize(e),Array.isArray(t)?t.forEach(function(e){var t={};"object"!=typeof e&&"function"!=typeof e||null===e?t.keyCode=parseInt(e):t=e;var n=new KeyboardEvent("keydown",t);document.dispatchEvent(n)}):this._validateScanCode(e,t),this},_reinitialize:function(e){var t=e.scannerDetectionData.vars;t.firstCharTime=0,t.lastCharTime=0,t.accumulatedString=""},_isFocusOnIgnoredElement:function(e){var t=e.scannerDetectionData.options.ignoreIfFocusOn;if(!t)return!1;var n=document.activeElement;if(Array.isArray(t)){for(var a=0;a<t.length;a++)if(!0===n.matches(t[a]))return!0}else if(n.matches(t))return!0;return!1},_validateScanCode:function(e,t){var n,a=e.scannerDetectionData,i=a.options,o=a.options.singleScanQty,r=a.vars.firstCharTime,s=a.vars.lastCharTime,c={};switch(!0){case t.length<i.minLength:c={message:"Receieved code is shorter then minimal length"};break;case s-r>t.length*i.avgTimeByChar:c={message:"Receieved code was not entered in time"};break;default:return i.onScan.call(e,t,o),n=new CustomEvent("scan",{detail:{scanCode:t,qty:o}}),e.dispatchEvent(n),d._reinitialize(e),!0}return c.scanCode=t,c.scanDuration=s-r,c.avgTimeByChar=i.avgTimeByChar,c.minLength=i.minLength,i.onScanError.call(e,c),n=new CustomEvent("scanError",{detail:c}),e.dispatchEvent(n),d._reinitialize(e),!1},_mergeOptions:function(e,t){var n,a={};for(n in e)Object.prototype.hasOwnProperty.call(e,n)&&(a[n]=e[n]);for(n in t)Object.prototype.hasOwnProperty.call(t,n)&&(a[n]=t[n]);return a},_getNormalizedKeyNum:function(e){return e.which||e.keyCode},_handleKeyDown:function(e){var t=d._getNormalizedKeyNum(e),n=this.scannerDetectionData.options,a=this.scannerDetectionData.vars,i=!1;if(!1!==n.onKeyDetect.call(this,t,e)&&!d._isFocusOnIgnoredElement(this))if(!1===n.scanButtonKeyCode||t!=n.scanButtonKeyCode){switch(!0){case a.firstCharTime&&-1!==n.suffixKeyCodes.indexOf(t):e.preventDefault(),e.stopImmediatePropagation(),i=!0;break;case!a.firstCharTime&&-1!==n.prefixKeyCodes.indexOf(t):e.preventDefault(),e.stopImmediatePropagation(),i=!1;break;default:var o=n.keyCodeMapper.call(this,e);if(null===o)return;a.accumulatedString+=o,n.preventDefault&&e.preventDefault(),n.stopPropagation&&e.stopImmediatePropagation(),i=!1}a.firstCharTime||(a.firstCharTime=Date.now()),a.lastCharTime=Date.now(),a.testTimer&&clearTimeout(a.testTimer),i?(d._validateScanCode(this,a.accumulatedString),a.testTimer=!1):a.testTimer=setTimeout(d._validateScanCode,n.timeBeforeScanTest,this,a.accumulatedString),n.onKeyProcess.call(this,o,e)}else a.longPressed||(a.longPressTimer=setTimeout(n.onScanButtonLongPress,n.scanButtonLongPressTime,this),a.longPressed=!0)},_handlePaste:function(e){if(!d._isFocusOnIgnoredElement(this)){e.preventDefault(),oOptions.stopPropagation&&e.stopImmediatePropagation();var t=(event.clipboardData||window.clipboardData).getData("text");this.scannerDetectionData.options.onPaste.call(this,t,event);var n=this.scannerDetectionData.vars;n.firstCharTime=0,n.lastCharTime=0,d._validateScanCode(this,t)}},_handleKeyUp:function(e){d._isFocusOnIgnoredElement(this)||d._getNormalizedKeyNum(e)==this.scannerDetectionData.options.scanButtonKeyCode&&(clearTimeout(this.scannerDetectionData.vars.longPressTimer),this.scannerDetectionData.vars.longPressed=!1)},isScanInProgressFor:function(e){return 0<e.scannerDetectionData.vars.firstCharTime}};return d});