cornerstoneTools.min.js

/*! cornerstoneTools - v0.2.2 - 2014-05-08 | (c) 2014 Chris Hafey | https://github.com/chafey/cornerstoneTools */
var cornerstoneTools=function(a,b,c){"use strict";function d(a){if(!("mousewheel"===a.originalEvent.type&&0===a.originalEvent.wheelDeltaY||"DOMMouseScroll"===a.originalEvent.type&&1===a.originalEvent.axis)){var c=a.currentTarget,d=b.pageToPixel(c,a.pageX,a.pageY);a=window.event||a;var e=a.wheelDelta||-a.detail||-a.originalEvent.detail,f=Math.max(-1,Math.min(1,e)),g=({element:c,viewport:b.getViewport(c),image:b.getEnabledElement(c).image,direction:f,pageX:a.pageX,pageY:a.pageY,imageX:d.x,imageY:d.y},new CustomEvent("CornerstoneToolsMouseWheel",{detail:{event:a,direction:f,viewport:b.getViewport(c),image:b.getEnabledElement(c).image,element:c},bubbles:!1,cancelable:!1}));c.dispatchEvent(g)}}function e(b){a(b).on(g,d)}function f(b){a(b).unbind(g,d)}void 0===c&&(c={});var g="mousewheel DOMMouseScroll";return c.mouseWheelInput={enable:e,disable:f},c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c,d){"use strict";function e(a){var b=new CustomEvent("CornerstoneToolsMouseDownActivate",{detail:a,bubbles:!1,cancelable:!0});a.element.dispatchEvent(b)}function f(f){function g(a){var e={page:c.point.pageToPoint(a),image:b.pageToPixel(i,a.pageX,a.pageY)},f={page:c.point.subtract(e.page,k.page),image:c.point.subtract(e.image,k.image)},g=new CustomEvent("CornerstoneToolsMouseDrag",{detail:{event:a,which:n,viewport:b.getViewport(i),image:b.getEnabledElement(i).image,element:i,startPoints:j,lastPoints:k,currentPoints:e,deltaPoints:f},bubbles:!1,cancelable:!0});return i.dispatchEvent(g),k=d.copyPoints(e),d.pauseEvent(a)}function h(d){var e={page:c.point.pageToPoint(d),image:b.pageToPixel(i,d.pageX,d.pageY)},f={page:c.point.subtract(e.page,k.page),image:c.point.subtract(e.image,k.image)},l=new CustomEvent("CornerstoneToolsMouseUp",{detail:{event:d,which:n,viewport:b.getViewport(i),image:b.getEnabledElement(i).image,element:i,startPoints:j,lastPoints:k,currentPoints:e,deltaPoints:f},bubbles:!1,cancelable:!1});i.dispatchEvent(l),a(document).off("mousemove",g),a(document).off("mouseup",h)}var i=(f.data,f.currentTarget),j={page:c.point.pageToPoint(f),image:b.pageToPixel(i,f.pageX,f.pageY)},k=d.copyPoints(j),l={event:f,which:f.which,viewport:b.getViewport(i),image:b.getEnabledElement(i).image,element:i,startPoints:j,lastPoints:k,currentPoints:j,deltaPoints:{x:0,y:0}},m=new CustomEvent("CornerstoneToolsMouseDown",{detail:l,bubbles:!1,cancelable:!0});if(i.dispatchEvent(m)===!0&&e(l)===!0)return d.pauseEvent(f);var n=f.which;return a(document).on("mousemove",g),a(document).on("mouseup",h),d.pauseEvent(f)}function g(a){var e=(a.data,a.currentTarget),f={page:c.point.pageToPoint(a),image:b.pageToPixel(e,a.pageX,a.pageY)},g=d.copyPoints(f),h=a.which,i={page:c.point.pageToPoint(a),image:b.pageToPixel(e,a.pageX,a.pageY)},j={page:c.point.subtract(i.page,g.page),image:c.point.subtract(i.image,g.image)},k=new CustomEvent("CornerstoneToolsMouseMove",{detail:{event:a,which:h,viewport:b.getViewport(e),image:b.getEnabledElement(e).image,element:e,startPoints:f,lastPoints:g,currentPoints:i,deltaPoints:j},bubbles:!1,cancelable:!1});e.dispatchEvent(k),g=d.copyPoints(i)}function h(b){a(b).on("mousedown",f),a(b).on("mousemove",g)}function i(b){a(b).off("mousedown",f),a(b).off("mousemove",g)}return void 0===d&&(d={}),d.mouseInput={enable:h,disable:i},d}($,cornerstone,cornerstoneMath,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c={activate:function(c,d){a(c).off("CornerstoneToolsMouseDownActivate",b);var e={mouseButtonMask:d};a(c).on("CornerstoneToolsMouseDownActivate",e,b)},disable:function(c){a(c).off("CornerstoneToolsMouseDownActivate",b)},enable:function(c){a(c).off("CornerstoneToolsMouseDownActivate",b)},deactivate:function(c){a(c).off("CornerstoneToolsMouseDownActivate",b)}};return c}return void 0===c&&(c={}),c.simpleMouseButtonTool=d,c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c,d){"use strict";function e(e){function f(b){var c=e.createNewMeasurement(b);d.addToolState(b.element,e.toolType,c),a(b.element).off("CornerstoneToolsMouseMove",h),d.moveHandle(b,c.handles.end,function(){d.anyHandlesOutsideImage(b,c.handles)&&d.removeToolState(b.element,e.toolType,c),a(b.element).on("CornerstoneToolsMouseMove",h)})}function g(a){var b=a.originalEvent.detail,c=a.data;return d.isMouseButtonEnabled(b.which,c.mouseButtonMask)?(f(b),!1):void 0}function h(a){var c=a.originalEvent.detail;if(0===c.which){var f=d.getToolState(c.element,e.toolType);if(void 0!==f){for(var g=!1,h=0;h<f.data.length;h++){var i=f.data[h];d.handleActivator(i.handles,c.currentPoints.image,c.viewport.scale)===!0&&(g=!0)}g===!0&&b.updateImage(c.element)}}}function i(a,b){for(var d in a.handles){var e=c.point.distanceSquared(a.handles[d],b);if(25>e)return a.handles[d]}}function j(b){function c(){d.anyHandlesOutsideImage(j,f.handles)&&d.removeToolState(j.element,e.toolType,f),a(j.element).on("CornerstoneToolsMouseMove",h)}var f,g=b.data,j=b.originalEvent.detail;if(d.isMouseButtonEnabled(j.which,g.mouseButtonMask)){var k,l=j.startPoints.image,m=d.getToolState(b.currentTarget,e.toolType);if(void 0!==m)for(k=0;k<m.data.length;k++){f=m.data[k];var n=i(f,l);if(void 0!==n)return a(j.element).off("CornerstoneToolsMouseMove",h),d.moveHandle(j,n,c),!1}if(void 0!==m&&void 0!==e.pointNearTool)for(k=0;k<m.data.length;k++)if(f=m.data[k],e.pointNearTool(f,l))return a(j.element).off("CornerstoneToolsMouseMove",h),d.moveAllHandles(b,f,m,!0),!1}}function k(c){a(c).off("CornerstoneImageRendered",e.onImageRendered),a(c).off("CornerstoneToolsMouseMove",h),a(c).off("CornerstoneToolsMouseDown",j),a(c).off("CornerstoneToolsMouseDownActivate",g),b.updateImage(c)}function l(c){a(c).off("CornerstoneImageRendered",e.onImageRendered),a(c).off("CornerstoneToolsMouseMove",h),a(c).off("CornerstoneToolsMouseDown",j),a(c).off("CornerstoneToolsMouseDownActivate",g),a(c).on("CornerstoneImageRendered",e.onImageRendered),b.updateImage(c)}function m(c,d){var f={mouseButtonMask:d};a(c).off("CornerstoneImageRendered",e.onImageRendered),a(c).off("CornerstoneToolsMouseMove",h),a(c).off("CornerstoneToolsMouseDown",j),a(c).off("CornerstoneToolsMouseDownActivate",g),a(c).on("CornerstoneImageRendered",e.onImageRendered),a(c).on("CornerstoneToolsMouseMove",f,h),a(c).on("CornerstoneToolsMouseDown",f,j),a(c).on("CornerstoneToolsMouseDownActivate",f,g),b.updateImage(c)}function n(c,d){var f={mouseButtonMask:d};a(c).off("CornerstoneImageRendered",e.onImageRendered),a(c).off("CornerstoneToolsMouseMove",h),a(c).off("CornerstoneToolsMouseDown",j),a(c).off("CornerstoneToolsMouseDownActivate",g),a(c).on("CornerstoneImageRendered",e.onImageRendered),a(c).on("CornerstoneToolsMouseMove",f,h),a(c).on("CornerstoneToolsMouseDown",f,j),b.updateImage(c)}var o={enable:l,disable:k,activate:m,deactivate:n};return o}return void 0===d&&(d={}),d.mouseButtonTool=e,d}($,cornerstone,cornerstoneMath,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c={activate:function(c){a(c).off("CornerstoneToolsMouseWheel",b);var d={};a(c).on("CornerstoneToolsMouseWheel",d,b)},disable:function(c){a(c).off("CornerstoneToolsMouseWheel",b)},enable:function(c){a(c).off("CornerstoneToolsMouseWheel",b)},deactivate:function(c){a(c).off("CornerstoneToolsMouseWheel",b)}};return c}return void 0===c&&(c={}),c.mouseWheelTool=d,c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c={activate:function(c){a(c).off("CornerstoneToolsTouchDrag",b);var d={};a(c).on("CornerstoneToolsTouchDrag",d,b)},disable:function(c){a(c).off("CornerstoneToolsTouchDrag",b)},enable:function(c){a(c).off("CornerstoneToolsTouchDrag",b)},deactivate:function(c){a(c).off("CornerstoneToolsTouchDrag",b)}};return c}return void 0===c&&(c={}),c.touchDragTool=d,c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c={activate:function(c){a(c).off("CornerstoneToolsTouchPinch",b);var d={};a(c).on("CornerstoneToolsTouchPinch",d,b)},disable:function(c){a(c).off("CornerstoneToolsTouchPinch",b)},enable:function(c){a(c).off("CornerstoneToolsTouchPinch",b)},deactivate:function(c){a(c).off("CornerstoneToolsTouchPinch",b)}};return c}return void 0===c&&(c={}),c.touchPinchTool=d,c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c,d){"use strict";function e(a){var b={visible:!0,handles:{start:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!1},end:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!0}}};return b}function f(a,b){var d={left:Math.min(a.handles.start.x,a.handles.end.x),top:Math.min(a.handles.start.y,a.handles.end.y),width:Math.abs(a.handles.start.x-a.handles.end.x),height:Math.abs(a.handles.start.y-a.handles.end.y)},e=c.rect.distanceToPoint(d,b);return 5>e}function g(a,b){var c=a.width/2,d=a.height/2;if(0>=c||0>=d)return!1;var e={x:a.left+c,y:a.top+d},f={x:b.x-e.x,y:b.y-e.y},g=f.x*f.y/(c*c)+f.y*f.y/(d*d)<=1;return g}function h(a,b){for(var c=0,d=0,e=0,f=0,h=b.top;h<b.top+b.height;h++)for(var i=b.left;i<b.left+b.width;i++)g(b,{x:i,y:h})===!0&&(c+=a[f],d+=a[f]*a[f],e++),f++;if(0===e)return{count:e,mean:0,variance:0,stdDev:0};var j=c/e,k=d/e-j*j;return{count:e,mean:j,variance:k,stdDev:Math.sqrt(k)}}function i(a){var c=d.getToolState(a.currentTarget,j);if(void 0!==c){var e=a.originalEvent.detail,f=e.canvasContext.canvas.getContext("2d");b.setToPixelCoordinateSystem(e.enabledElement,f);for(var g=0;g<c.data.length;g++){f.save();var i=c.data[g],k=Math.abs(i.handles.start.x-i.handles.end.x),l=Math.abs(i.handles.start.y-i.handles.end.y),m=Math.min(i.handles.start.x,i.handles.end.x),n=Math.min(i.handles.start.y,i.handles.end.y),o=(i.handles.start.x+i.handles.end.x)/2,p=(i.handles.start.y+i.handles.end.y)/2;f.beginPath(),f.strokeStyle="white",f.lineWidth=1/e.viewport.scale,d.drawEllipse(f,m,n,k,l),f.closePath(),f.beginPath(),d.drawHandles(f,e,i.handles),f.stroke();var q=b.getStoredPixels(e.element,m,n,k,l),r={left:m,top:n,width:k,height:l},s=h(q,r),t=Math.PI*(k*e.image.columnPixelSpacing/2)*(l*e.image.rowPixelSpacing/2),u="Area: "+t.toFixed(2)+" mm^2",v=d.setContextToDisplayFontSize(e.enabledElement,e.canvasContext,15);f.font=""+v.fontSize+"px Arial";var w=f.measureText(t),x=v.lineHeight,y=o<e.image.columns/2?o+k/2:o-k/2-w.width*v.fontScale,z=p<e.image.rows/2?p+l/2:p-l/2;y/=v.fontScale,z/=v.fontScale,f.fillStyle="white",f.fillText("Mean: "+s.mean.toFixed(2),y,z-x),f.fillText("StdDev: "+s.stdDev.toFixed(2),y,z),f.fillText(u,y,z+x),f.restore()}}}void 0===d&&(d={});var j="ellipticalRoi";return d.ellipticalRoi=d.mouseButtonTool({createNewMeasurement:e,onImageRendered:i,pointNearTool:f,toolType:j}),d}($,cornerstone,cornerstoneMath,cornerstoneTools),cornerstoneTools=function(a,b,c,d){"use strict";function e(a){var b={visible:!0,handles:{start:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!1},end:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!0}}};return b}function f(a,b){var d={start:a.handles.start,end:a.handles.end},e=c.lineSegment.distanceToPoint(d,b);return 5>e}function g(a){var c=d.getToolState(a.currentTarget,h);if(void 0!==c){var e=a.originalEvent.detail,f=e.canvasContext.canvas.getContext("2d");b.setToPixelCoordinateSystem(e.enabledElement,f);for(var g=0;g<c.data.length;g++){f.save();var i=c.data[g];f.beginPath(),f.strokeStyle="white",f.lineWidth=1/e.viewport.scale,f.moveTo(i.handles.start.x,i.handles.start.y),f.lineTo(i.handles.end.x,i.handles.end.y),f.stroke(),f.beginPath(),d.drawHandles(f,e,i.handles),f.stroke(),f.fillStyle="white";var j=i.handles.start.x-i.handles.end.x*e.image.columnPixelSpacing,k=i.handles.start.y-i.handles.end.y*e.image.rowPixelSpacing,l=Math.sqrt(j*j+k*k),m=""+l.toFixed(2)+" mm",n=d.setContextToDisplayFontSize(e.enabledElement,e.canvasContext,15);f.font=""+n.fontSize+"px Arial";var o=(i.handles.start.x+i.handles.end.x)/2/n.fontScale,p=(i.handles.start.y+i.handles.end.y)/2/n.fontScale;f.fillText(m,o,p),f.restore()}}}void 0===d&&(d={});var h="length";return d.length=d.mouseButtonTool({createNewMeasurement:e,onImageRendered:g,pointNearTool:f,toolType:h}),d}($,cornerstone,cornerstoneMath,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c=b.originalEvent.detail;a(c.element).off("CornerstoneToolsMouseDrag",f),a(c.element).off("CornerstoneToolsMouseUp",d)}function e(b){var e=b.originalEvent.detail;return c.isMouseButtonEnabled(e.which,b.data.mouseButtonMask)?(a(e.element).on("CornerstoneToolsMouseDrag",f),a(e.element).on("CornerstoneToolsMouseUp",d),!1):void 0}function f(a){var c=a.originalEvent.detail;return c.viewport.translation.x+=c.deltaPoints.page.x/c.viewport.scale,c.viewport.translation.y+=c.deltaPoints.page.y/c.viewport.scale,b.setViewport(c.element,c.viewport),!1}function g(a){var c=a.originalEvent.detail;return c.viewport.translation.x+=c.deltaPoints.page.x/c.viewport.scale,c.viewport.translation.y+=c.deltaPoints.page.y/c.viewport.scale,b.setViewport(c.element,c.viewport),!1}return void 0===c&&(c={}),c.pan=c.simpleMouseButtonTool(e),c.panTouchDrag=c.touchDragTool(g),c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(a){var b={visible:!0,handles:{end:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!0}}};return b}function e(a){var d=c.getToolState(a.currentTarget,f);if(void 0!==d){var e=a.originalEvent.detail,g=e.canvasContext.canvas.getContext("2d");b.setToPixelCoordinateSystem(e.enabledElement,g);for(var h=0;h<d.data.length;h++){g.save();var i=d.data[h];g.beginPath(),c.drawHandles(g,e,i.handles),g.stroke();var j=c.setContextToDisplayFontSize(e.enabledElement,e.canvasContext,15);g.font=""+j.fontSize+"px Arial";var k=Math.round(i.handles.end.x),l=Math.round(i.handles.end.y);m=i.handles.end.x+3,n=i.handles.end.y-3;var m=m/j.fontScale,n=n/j.fontScale;g.fillStyle="white";var o=b.getStoredPixels(e.element,k,l,1,1),p=o[0],q=p*e.image.slope+e.image.intercept;g.fillText(""+k+","+l,m,n),g.fillText("SP: "+p+" MO: "+q,m,n+j.lineHeight),g.restore()}}}void 0===c&&(c={});var f="probe";return c.probe=c.mouseButtonTool({createNewMeasurement:d,onImageRendered:e,toolType:f}),c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c,d){"use strict";function e(a){var b={visible:!0,handles:{start:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!1},end:{x:a.currentPoints.image.x,y:a.currentPoints.image.y,highlight:!0,active:!0}}};return b}function f(a,b){var d={left:Math.min(a.handles.start.x,a.handles.end.x),top:Math.min(a.handles.start.y,a.handles.end.y),width:Math.abs(a.handles.start.x-a.handles.end.x),height:Math.abs(a.handles.start.y-a.handles.end.y)},e=c.rect.distanceToPoint(d,b);return 5>e}function g(a,b){for(var c=0,d=0,e=0,f=0,g=b.top;g<b.top+b.height;g++)for(var h=b.left;h<b.left+b.width;h++)c+=a[f],d+=a[f]*a[f],e++,f++;if(0===e)return{count:e,mean:0,variance:0,stdDev:0};var i=c/e,j=d/e-i*i;return{count:e,mean:i,variance:j,stdDev:Math.sqrt(j)}}function h(a){var c=d.getToolState(a.currentTarget,i);if(void 0!==c){var e=a.originalEvent.detail,f=e.canvasContext.canvas.getContext("2d");b.setToPixelCoordinateSystem(e.enabledElement,f);for(var h=0;h<c.data.length;h++){f.save();var j=c.data[h],k=Math.abs(j.handles.start.x-j.handles.end.x),l=Math.abs(j.handles.start.y-j.handles.end.y),m=Math.min(j.handles.start.x,j.handles.end.x),n=Math.min(j.handles.start.y,j.handles.end.y),o=(j.handles.start.x+j.handles.end.x)/2,p=(j.handles.start.y+j.handles.end.y)/2;f.beginPath(),f.strokeStyle="white",f.lineWidth=1/e.viewport.scale,f.rect(m,n,k,l),f.stroke(),f.beginPath(),d.drawHandles(f,e,j.handles),f.stroke();var q=b.getStoredPixels(e.element,m,n,k,l),r={left:m,top:n,width:k,height:l},s=g(q,r),t=k*e.image.columnPixelSpacing*l*e.image.rowPixelSpacing,u="Area: "+t.toFixed(2)+" mm^2",v=d.setContextToDisplayFontSize(e.enabledElement,e.canvasContext,15);f.font=""+v.fontSize+"px Arial";var w=f.measureText(t),x=v.lineHeight,y=o<e.image.columns/2?o+k/2:o-k/2-w.width*v.fontScale,z=p<e.image.rows/2?p+l/2:p-l/2;y/=v.fontScale,z/=v.fontScale,f.fillStyle="white",f.fillText("Mean: "+s.mean.toFixed(2),y,z-x),f.fillText("StdDev: "+s.stdDev.toFixed(2),y,z),f.fillText(u,y,z+x),f.restore()}}}void 0===d&&(d={});var i="rectangleRoi";return d.rectangleRoi=d.mouseButtonTool({createNewMeasurement:e,onImageRendered:h,pointNearTool:f,toolType:i}),d}($,cornerstone,cornerstoneMath,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(b){var c=b.originalEvent.detail;a(c.element).off("CornerstoneToolsMouseDrag",f),a(c.element).off("CornerstoneToolsMouseUp",d)}function e(b){var e=b.originalEvent.detail;return c.isMouseButtonEnabled(e.which,b.data.mouseButtonMask)?(a(e.element).on("CornerstoneToolsMouseDrag",f),a(e.element).on("CornerstoneToolsMouseUp",d),!1):void 0}function f(a){var c=a.originalEvent.detail,d=c.image.maxPixelValue-c.image.minPixelValue,e=d/1024;return c.viewport.voi.windowWidth+=c.deltaPoints.page.x*e,c.viewport.voi.windowCenter+=c.deltaPoints.page.y*e,b.setViewport(c.element,c.viewport),!1}function g(a){var c=a.originalEvent.detail,d=c.image.maxPixelValue-c.image.minPixelValue,e=d/1024;c.viewport.voi.windowWidth+=c.deltaPoints.page.x*e,c.viewport.voi.windowCenter+=c.deltaPoints.page.y*e,b.setViewport(c.element,c.viewport)}return void 0===c&&(c={}),c.wwwc=c.simpleMouseButtonTool(e),c.wwwcTouchDrag=c.touchDragTool(g),c}($,cornerstone,cornerstoneTools),cornerstoneTools=function(a,b,c){"use strict";function d(a,c,d){var e=1.7,f=Math.log(c.scale)/Math.log(e),g=f+d,h=Math.pow(e,g);c.scale=h,b.setViewport(a,c)}function e(b){var c=b.originalEvent.detail;a(c.element).off("CornerstoneToolsMouseDrag",g),a(c.element).off("CornerstoneToolsMouseUp",e)}function f(b){var d=b.originalEvent.detail;return c.isMouseButtonEnabled(d.which,b.data.mouseButtonMask)?(a(d.element).on("CornerstoneToolsMouseDrag",g),a(d.element).on("CornerstoneToolsMouseUp",e),!1):void 0}function g(a){var c=a.originalEvent.detail,e=c.deltaPoints.page.y/100;d(c.element,c.viewport,e);var f=b.pageToPixel(c.element,c.startPoints.page.x,c.startPoints.page.y);return c.viewport.translation.x-=c.startPoints.image.x-f.x,c.viewport.translation.y-=c.startPoints.image.y-f.y,b.setViewport(c.element,c.viewport),!1}function h(a){var b=a.originalEvent.detail,c=-b.direction/4;d(b.element,b.viewport,c)}function i(a){var b=a.originalEvent.detail;d(b.element,b.viewport,b.direction/4)}function j(a){var c=a.originalEvent.detail,e=c.deltaPoints.page.y/100;d(c.element,c.viewport,e);var f=b.pageToPixel(c.element,c.startPoints.page.x,c.startPoints.page.y);return c.viewport.translation.x-=c.startPoints.image.x-f.x,c.viewport.translation.y-=c.startPoints.image.y-f.y,b.setViewport(c.element,c.viewport),!1}return void 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