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/**
	 * Tiny stack for browser or server
	 *
	 * @author Jason Mulligan <jason.mulligan@avoidwork.com>
	 * @copyright 2018
	 * @license BSD-3-Clause
	 * @link http://avoidwork.github.io/tiny-stack
	 * @version 1.1.0
	 */
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	 *
	 * @author Jason Mulligan <jason.mulligan@avoidwork.com>
	 * @copyright 2018
	 * @license BSD-3-Clause
	 * @link http://avoidwork.github.io/tiny-stack
	 * @version 1.1.0
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i=this;e.on("canvas.init",function(e){i._init(!1!==t.enabled)})}Ar.$inject=["config.zoomScroll","eventBus","canvas"],Ar.prototype.scroll=function(e){this._canvas.scroll(e)},Ar.prototype.reset=function(){this._canvas.zoom("fit-viewport")},Ar.prototype.zoom=function(e,t){var n=Er(_r,20);this._totalDelta+=e,.1<Math.abs(this._totalDelta)&&(this._zoom(e,t,n),this._totalDelta=0)},Ar.prototype._handleWheel=function(e){if(!B(e.target,".djs-scrollable",!0)){var t=this._container;e.preventDefault();var n,i=e.ctrlKey,r=e.shiftKey,a=-1*this._scale;if(a*=i?0===e.deltaMode?.02:.32:0===e.deltaMode?1:16,i){var o=t.getBoundingClientRect(),s={x:e.clientX-o.left,y:e.clientY-o.top};n=Math.sqrt(Math.pow(e.deltaY,2)+Math.pow(e.deltaX,2))*wr(e.deltaY)*a,this.zoom(n,s)}else n=r?{dx:a*e.deltaY,dy:0}:{dx:a*e.deltaX,dy:a*e.deltaY},this.scroll(n)}},Ar.prototype.stepZoom=function(e,t){var n=Er(_r,10);this._zoom(e,t,n)},Ar.prototype._zoom=function(e,t,n){var i=this._canvas,r=0<e?1:-1,a=xr(i.zoom()),o=Math.round(a/n)*n;o+=n*r;var s,l,p=Math.pow(10,o);i.zoom((s=_r,l=p,Math.max(s.min,Math.min(s.max,l))),t)},Ar.prototype.toggle=function(e){var t=this._container,n=this._handleWheel,i=this._enabled;return void 0===e&&(e=!i),i!==e&&j[e?"bind":"unbind"](t,"wheel",n,!1),this._enabled=e},Ar.prototype._init=function(e){this.toggle(e)};var Sr={__init__:["zoomScroll"],zoomScroll:["type",Ar]};function Rr(e){ir.call(this,e)}return t(Rr,ir),Rr.prototype._modules=[].concat(Rr.prototype._modules,Rr.prototype._navigationModules=[mr,br,Sr]),Rr});