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2 lines
20 KiB
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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")();y(n)?e.src=n:n.then((function(t){e.src=t})),e.onload=function(){var n=O;O=e,i.historyList.push(n),i.historyList=i.historyList.slice(-t)}}else i.historyList.length++},this.drawByImage=function(t){var 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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 u=s.getContext("2d");u.drawImage(n,0,0,e,i);var h=u.getImageData(0,0,e,i).data;return t(h)}var c,l=this.get("context").getImageData(0,0,a,r);return f(c=l)&&m(c.then)&&m(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),u=0,h=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),u=Math.max(u,l),h=Math.max(h,v)}}var f={width:(u-o+1)/e,height:(h-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)},a=this.get("el").canvas;a&&a.requestAnimationFrame?a.requestAnimationFrame((function(){return o()})):"function"==typeof requestAnimationFrame?requestAnimationFrame((function(){return o()})):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}(),C=function(){function t(e){o(this,t),this.canvas=void 0,this._ee=void 0,this.pen=void 0;var i=new S(e);i.set("parent",this),this.canvas=i,this._ee=new x,this.pen=new W(i),this.init()}return r(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}();t.Signature=C,t.default=C,Object.defineProperty(t,"__esModule",{value:!0})}));
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