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h=i.get("context");h.lineWidth=s,h.beginPath(),h.moveTo(Number(t.toFixed(1)),Number(e.toFixed(1))),h.quadraticCurveTo(Number(n.toFixed(1)),Number(o.toFixed(1)),Number(a.toFixed(1)),Number(r.toFixed(1))),h.stroke(),h.draw&&h.draw(!0)},this.getRadianData=function(t,e,i,n){var o=i-t,a=n-e;if(0===o)return{val:0,pos:-1};if(0===a)return{val:0,pos:1};var r=Math.abs(Math.atan(a/o));return i>t&&e>n||t>i&&n>e?{val:r,pos:1}:{val:r,pos:-1}},this.getRadianPoints=function(t,e,i,n){if(0===t.val)return 1===t.pos?[{x:e,y:i+n},{x:e,y:i-n}]:[{y:i,x:e+n},{y:i,x:e-n}];var o=Math.sin(t.val)*n,a=Math.cos(t.val)*n;return 1===t.pos?[{x:e+o,y:i+a},{x:e-o,y:i-a}]:[{x:e+o,y:i-a},{x:e-o,y:i+a}]},this.drawSmoothLine=function(t,e){var n=e.x-t.x,o=e.y-t.y;if(Math.abs(n)+Math.abs(o)>2?(e.lastX1=t.x+.3*n,e.lastY1=t.y+.3*o,e.lastX2=t.x+.7*n,e.lastY2=t.y+.7*o):(e.lastX1=e.lastX2=t.x+.5*n,e.lastY1=e.lastY2=t.y+.5*o),e.perLineWidth=(t.lineWidth+e.lineWidth)/2,"number"==typeof t.lastX1){if(i.drawCurveLine(t.lastX2,t.lastY2,t.x,t.y,e.lastX1,e.lastY1,e.perLineWidth),t.isFirstPoint)return;if(t.lastX1===t.lastX2&&t.lastY1===t.lastY2)return;var a=i.getRadianData(t.lastX1,t.lastY1,t.lastX2,t.lastY2),r=i.getRadianPoints(a,t.lastX1,t.lastY1,t.perLineWidth/2),s=i.getRadianPoints(a,t.lastX2,t.lastY2,e.perLineWidth/2);i.drawTrapezoid(r[0],s[0],s[1],r[1])}else e.isFirstPoint=!0},this.addHistory=function(){var t=i.get("options").maxHistoryLength;if(t&&i.canAddHistory)if(i.canAddHistory=!1,i.get("createImage")){var e=null;e=i.get("createImage")();var n=i.get("toDataURL")&&i.get("toDataURL")();p(n)?e.src=n:n.then((function(t){e.src=t})),e.onload=function(){var n=D;D=e,i.historyList.push(n),i.historyList=i.historyList.slice(-t)}}else i.historyList.length++},this.drawByImage=function(t){var e=i.get("context"),n=i.get("width"),o=i.get("height");e.clearRect(0,0,n,o);try{t&&e.drawImage(t,0,0,n,o),e.draw&&e.draw(!0)}catch(t){i.historyList.length=0}},this.isEmpty=function(){return i.get("options").maxHistoryLength>0?0===i.historyList.length:i._isEmpty},this.clear=function(){if(!i.get("options").disabled){var t=i.get("context");t.clearRect(0,0,i.get("width"),i.get("height")),t.draw&&t.draw(),i._isEmpty=!0,D=null,i.historyList.length=0}},this.undo=function(){if(!i.get("options").disabled&&(0===i.get("options").maxHistoryLength&&i.clear(),i.get("createImage")&&i.historyList.length)){var t=i.historyList.pop();i.drawByImage(t),i.undoneList.push(D),D=t,i.historyList.length||i.undoneList.length||i.clear()}},this.redo=function(){if(i.undoneList.length&&!i.get("options").disabled){var t=i.undoneList.pop();i.historyList.push(D),i.drawByImage(t),D=t,i._isEmpty=!1}},this.canvas=e,this.canvas.set("pen",S),this.init()}return a(t,[{key:"getOption",value:function(){}},{key:"setOption",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},i=e({},t),n=i.maxLineWidth;if(n&&t.penSize&&n==S.maxLineWidth){var o=Math.max(n,t.penSize);i.maxLineWidth=o}this.canvas.set("pen",Object.assign({},S,i))}},{key:"get",value:function(t){return this.canvas.get("options"==t?"pen":t)}},{key:"init",value:function(){var t=this;this.get("context").lineCap="round",this.canvas.on("touchstart",(function(e){return t.onDrawStart(e)})),this.canvas.on("touchmove",(function(e){return t.onDrawMove(e)})),this.canvas.on("touchend",(function(e){return t.onDrawEnd(e)}))}},{key:"drawBackground",value:function(){var t=this.get("context"),e=this.get("width"),i=this.get("height"),n=this.get("options"),o=n.backgroundColor,a=n.backgroundImage;o&&(t.fillStyle=o,t.fillRect(0,0,e,i),t.draw&&t.draw(!0)),a&&this.drawByImage(a)}},{key:"getImageData",value:function(t){if(t){var e=this.get("width"),i=this.get("height"),n=this.get("el"),o="CANVAS"===n.nodeName,a=o?e:n.width,r=o?i:n.height;if(o){var s=document.createElement("canvas");s.width=e,s.height=i;var h=s.getContext("2d");h.drawImage(n,0,0,e,i);var u=h.getImageData(0,0,e,i).data;return t(u)}var c,l=this.get("context").getImageData(0,0,a,r);return v(c=l)&&g(c.then)&&g(c.catch)?(l.then((function(e){return t(e.data)})),null):t(l.data)}}},{key:"getMaskedImageData",value:function(t){if(t)return this.getImageData((function(e){for(var i=0;e.length>i;i+=4){0===e[i+3]?(e[i]=0,e[i+1]=0,e[i+2]=0):(e[i]=255,e[i+1]=255,e[i+2]=255)}return t(e)}))}},{key:"getContentBoundingBox",value:function(t){var e=this.get("pixelRatio"),i=this.get("width"),n=this.get("height"),o=this.get("el"),a="CANVAS"===o.nodeName,r=a?i:o.width,s=a?n:o.height;e=a?1:e;return this.getImageData((function(i){for(var n=Math.floor(r),o=n,a=Math.floor(s),h=0,u=0,c=0;i.length>c;c+=4){if(i[c+3]>0){var l=c/4%n,v=Math.floor(c/4/n);o=Math.min(o,l),a=Math.min(a,v),h=Math.max(h,l),u=Math.max(u,v)}}var f={width:(h-o+1)/e,height:(u-a+1)/e,startX:o/e,startY:a/e};return t&&t(f),f}))}},{key:"remove",value:function(){var t=this;this.canvas.off("touchstart",(function(e){return t.onDrawStart(e)})),this.canvas.off("touchmove",(function(e){return t.onDrawMove(e)})),this.canvas.off("touchend",(function(e){return t.onDrawEnd(e)}))}},{key:"disableScroll",value:function(t){t.preventDefault&&this.get("options").disableScroll&&t.preventDefault()}},{key:"onDrawStart",value:function(t){if(!this.get("options").disabled){this.disableScroll(t),this.undoneList.length=0;var e=t.points;if(this.active){this.canAddHistory=!0,this.get("context").strokeStyle=this.get("options").penColor;var i=e[0];this.initPoint(i.x,i.y)}}}},{key:"onDrawMove",value:function(t){if(!this.get("options").disabled&&(this.disableScroll(t),this.active)){var e=t.points[0];this.initPoint(e.x,e.y),this.onDraw()}}},{key:"onDrawEnd",value:function(t){this.active&&!this.get("options").disabled&&(this.addHistory(),this.canAddHistory=!0,this.points=[])}},{key:"onDraw",value:function(){var t=this,e=this.get("context");if(this.points.length>=2){e.lineWidth=this.get("options").penSize||2;var i=this.points.slice(-1)[0],n=this.points.slice(-2,-1)[0],o=function(){t._isEmpty=!1,t.get("options").openSmooth?t.drawSmoothLine(n,i):t.drawNoSmoothLine(n,i)};o()}}},{key:"getMaxLineWidth",value:function(){var t=this.get("options");return Math.min(t.penSize,t.maxLineWidth)}},{key:"initPoint",value:function(t,e){var i={x:t,y:e,t:Date.now()},n=this.points.slice(-1)[0];if(!n||n.t!==i.t&&(n.x!==t||n.y!==e)){if(this.get("options").openSmooth&&n){var o=this.points.slice(-2,-1)[0];if(i.distance=Math.sqrt(Math.pow(i.x-n.x,2)+Math.pow(i.y-n.y,2)),i.speed=i.distance/(i.t-n.t||.1),i.lineWidth=this.getLineWidth(i.speed),o&&o.lineWidth&&n.lineWidth){var a=(i.lineWidth-n.lineWidth)/n.lineWidth,r=this.get("options").maxWidthDiffRate/100;if(r=r>1?1:.01>r?.01:r,Math.abs(a)>r)i.lineWidth=n.lineWidth*(1+(a>0?r:-r))}}this.points.push(i),this.points=this.points.slice(-3)}}}]),t}(),W=function(){function t(e){n(this,t),this.canvas=void 0,this._ee=void 0,this.pen=void 0;var i=new T(e);i.set("parent",this),this.canvas=i,this._ee=new m,this.pen=new O(i),this.init()}return a(t,[{key:"init",value:function(){this.pen.active=!0}},{key:"destroy",value:function(){this.canvas.destroy()}},{key:"clear",value:function(){this.pen.clear()}},{key:"undo",value:function(){this.pen.undo()}},{key:"redo",value:function(){this.pen.redo()}},{key:"save",value:function(){}},{key:"getContentBoundingBox",value:function(t){return this.pen.getContentBoundingBox(t)}},{key:"getMaskedImageData",value:function(t){return this.pen.getMaskedImageData(t)}},{key:"isEmpty",value:function(){return this.pen.isEmpty()}},{key:"on",value:function(t,e){this._ee.on(t,e)}},{key:"emit",value:function(t,e){this._ee.emit(t,e)}},{key:"off",value:function(t,e){this._ee.off(t,e)}}]),t}();export default W;export{W as Signature};