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a&&a.tagName.toLowerCase()===e.toLowerCase()||(i=a||null,a=sd(t.ownerDocument,e,r),t.insertBefore(a,i)),a}function fd(t,n){for(var e=t.childNodes,r=e.length;r>n;)t.removeChild(e[--r]);return t}function hd(t){return"mark-"+t.marktype+(t.role?" role-"+t.role:"")+(t.name?" 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i=e._call;e._ready=e._loader.ready().then((function(t){t&&i(),e._ready=null}))}return r},yd.sanitizeURL=function(t){return this._load("sanitizeURL",t)},yd.loadImage=function(t){return this._load("loadImage",t)};var _d="dragleave",xd="mousedown",bd="mousemove",wd="mouseout",kd="click",Ad=["keydown","keypress","keyup","dragenter",_d,"dragover",xd,"mouseup",bd,wd,"mouseover",kd,"dblclick","wheel","mousewheel","touchstart","touchmove","touchend"],Md=bd,Ed=wd,Cd=kd;function Dd(t,n){pd.call(this,t,n),this._down=null,this._touch=null,this._first=!0,this._events={}}var Fd=xt(Dd,pd);Fd.initialize=function(t,n,e){var r=this;return this._canvas=t&&ld(t,"canvas"),[kd,xd,bd,wd,_d].forEach((function(t){return Sd(r,t)})),pd.prototype.initialize.call(this,t,n,e)};function Sd(t,n){(function(t){return"touchstart"===t||"touchmove"===t||"touchend"===t?["touchstart","touchmove","touchend"]:[t]})(n).forEach((function(n){return function(t,n){var e=t.canvas();e&&!t._events[n]&&(t._events[n]=1,e.addEventListener(n,t[n]?function(e){return t[n](e)}:function(e){return t.fire(n,e)}))}(t,n)}))}function Td(t,n,e){return function(r){var i=this._active,a=this.pickEvent(r);a===i||(i&&i.exit||this.fire(e,r),this._active=a,this.fire(n,r)),this.fire(t,r)}}function Bd(t){return function(n){this.fire(t,n),this._active=null}}Fd.canvas=function(){return this._canvas},Fd.context=function(){return this._canvas.getContext("2d")},Fd.events=Ad,Fd.DOMMouseScroll=function(t){this.fire("mousewheel",t)},Fd.mousemove=Td(bd,"mouseover",wd),Fd.dragover=Td("dragover","dragenter",_d),Fd.mouseout=Bd(wd),Fd.dragleave=Bd(_d),Fd.mousedown=function(t){this._down=this._active,this.fire(xd,t)},Fd.click=function(t){this._down===this._active&&(this.fire(kd,t),this._down=null)},Fd.touchstart=function(t){this._touch=this.pickEvent(t.changedTouches[0]),this._first&&(this._active=this._touch,this._first=!1),this.fire("touchstart",t,!0)},Fd.touchmove=function(t){this.fire("touchmove",t,!0)},Fd.touchend=function(t){this.fire("touchend",t,!0),this._touch=null},Fd.fire=function(t,n,e){var r=e?this._touch:this._active,i=this._handlers[t];if(n.vegaType=t,t===Cd&&r&&r.href?this.handleHref(n,r,r.href):t!==Md&&t!==Ed||this.handleTooltip(n,r,t!==Ed),i)for(var a=0,u=i.length;a<u;++a)i[a].handler.call(this._obj,n,r)},Fd.on=function(t,n){var e=this.eventName(t),r=this._handlers;return this._handlerIndex(r[e],t,n)<0&&(Sd(this,t),(r[e]||(r[e]=[])).push({type:t,handler:n})),this},Fd.off=function(t,n){var e=this.eventName(t),r=this._handlers[e],i=this._handlerIndex(r,t,n);return i>=0&&r.splice(i,1),this},Fd.pickEvent=function(t){var n=dd(t,this._canvas),e=this._origin;return this.pick(this._scene,n[0],n[1],n[0]-e[0],n[1]-e[1])},Fd.pick=function(t,n,e,r,i){var a=this.context();return Qh[t.marktype].pick.call(this,a,t,n,e,r,i)};var Od="undefined"!=typeof window&&window.devicePixelRatio||1;function zd(t){md.call(this,t),this._options={},this._redraw=!1,this._dirty=new sf,this._tempb=new sf}var Rd=xt(zd,md),Nd=md.prototype;Rd.initialize=function(t,n,e,r,i,a){return 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this._options.externalContext||(this._canvas?this._canvas.getContext("2d"):null)},Rd.dirty=function(t){for(var n=this._tempb.clear().union(t.bounds),e=t.mark.group;e;)n.translate(e.x||0,e.y||0),e=e.mark.group;this._dirty.union(n)};function Pd(t,n){pd.call(this,t,n);var e=this;e._hrefHandler=Ld(e,(function(t,n){n&&n.href&&e.handleHref(t,n,n.href)})),e._tooltipHandler=Ld(e,(function(t,n){e.handleTooltip(t,n,t.type!==Ed)}))}Rd._render=function(t){var n=this.context(),e=this._origin,r=this._width,i=this._height,a=this._dirty,u=function(t,n,e){return(new sf).set(0,0,n,e).translate(-t[0],-t[1])}(e,r,i);n.save();var o=this._redraw||a.empty()?(this._redraw=!1,u.expand(1)):function(t,n,e){return n.expand(1).round(),t.pixelRatio%1&&n.scale(t.pixelRatio).round().scale(1/t.pixelRatio),n.translate(-e[0]%1,-e[1]%1),t.beginPath(),t.rect(n.x1,n.y1,n.width(),n.height()),t.clip(),n}(n,u.intersect(a),e);return this.clear(-e[0],-e[1],r,i),this.draw(n,t,o),n.restore(),a.clear(),this},Rd.draw=function(t,n,e){var r=Qh[n.marktype];n.clip&&function(t,n){var e=n.clip;t.save(),it(e)?(t.beginPath(),e(t),t.clip()):ch(t,n.group)}(t,n),r.draw.call(this,t,n,e),n.clip&&t.restore()},Rd.clear=function(t,n,e,r){var i=this._options,a=this.context();"pdf"===i.type||i.externalContext||a.clearRect(t,n,e,r),null!=this._bgcolor&&(a.fillStyle=this._bgcolor,a.fillRect(t,n,e,r))};var qd=xt(Pd,pd);qd.initialize=function(t,n,e){var r=this._svg;return r&&(r.removeEventListener(Cd,this._hrefHandler),r.removeEventListener(Md,this._tooltipHandler),r.removeEventListener(Ed,this._tooltipHandler)),this._svg=r=t&&ld(t,"svg"),r&&(r.addEventListener(Cd,this._hrefHandler),r.addEventListener(Md,this._tooltipHandler),r.addEventListener(Ed,this._tooltipHandler)),pd.prototype.initialize.call(this,t,n,e)},qd.canvas=function(){return this._svg};var Ld=function(t,n){return function(e){var 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25:t.next=30;break;case 27:t.prev=27,t.t0=t.catch(3),r.e(t.t0);case 30:return t.prev=30,r.f(),t.finish(30);case 33:case"end":return t.stop()}}),t,this,[[3,27,30,33]])}))},{key:"_cell",value:function(t){var n=this.circumcenters,e=this.delaunay,r=e.inedges,i=e.halfedges,a=e.triangles,u=r[t];if(-1===u)return null;var o=[],s=u;do{var l=Math.floor(s/3);if(o.push(n[2*l],n[2*l+1]),a[s=s%3==2?s-2:s+1]!==t)break;s=i[s]}while(s!==u&&-1!==s);return o}},{key:"_clip",value:function(t){if(0===t&&1===this.delaunay.hull.length)return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];var n=this._cell(t);if(null===n)return null;var e=this.vectors,r=4*t;return e[r]||e[r+1]?this._clipInfinite(t,n,e[r],e[r+1],e[r+2],e[r+3]):this._clipFinite(t,n)}},{key:"_clipFinite",value:function(t,n){for(var e,r,i,a,u,o=n.length,s=null,l=n[o-2],c=n[o-1],f=this._regioncode(l,c),h=0;h<o;h+=2)if(e=l,r=c,l=n[h],c=n[h+1],i=f,f=this._regioncode(l,c),0===i&&0===f)a=u,u=0,s?s.push(l,c):s=[l,c];else{var d=void 0,p=void 0,v=void 0,g=void 0,m=void 0;if(0===i){if(null===(d=this._clipSegment(e,r,l,c,i,f)))continue;var y=_slicedToArray(d,4);p=y[0],v=y[1],g=y[2],m=y[3]}else{if(null===(d=this._clipSegment(l,c,e,r,f,i)))continue;var _=_slicedToArray(d,4);g=_[0],m=_[1],p=_[2],v=_[3],a=u,u=this._edgecode(p,v),a&&u&&this._edge(t,a,u,s,s.length),s?s.push(p,v):s=[p,v]}a=u,u=this._edgecode(g,m),a&&u&&this._edge(t,a,u,s,s.length),s?s.push(g,m):s=[g,m]}if(s)a=u,u=this._edgecode(s[0],s[1]),a&&u&&this._edge(t,a,u,s,s.length);else if(this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2))return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];return s}},{key:"_clipSegment",value:function(t,n,e,r,i,a){for(;;){if(0===i&&0===a)return[t,n,e,r];if(i&a)return null;var u=void 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