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/*!
Event object based on jQuery events, MIT license
https://jquery.org/license/
https://tldrlegal.com/license/mit-license
https://github.com/jquery/jquery/blob/master/src/event.js
*/
let Event = function( src, props ){
this.recycle( src, props );
};
function returnFalse(){
return false;
}
function returnTrue(){
return true;
}
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
Event.prototype = {
instanceString: function(){
return 'event';
},
recycle: function( src, props ){
this.isImmediatePropagationStopped = this.isPropagationStopped = this.isDefaultPrevented = returnFalse;
if( src != null && src.preventDefault ){ // Browser Event object
this.type = src.type;
// Events bubbling up the document may have been marked as prevented
// by a handler lower down the tree; reflect the correct value.
this.isDefaultPrevented = ( src.defaultPrevented ) ? returnTrue : returnFalse;
} else if( src != null && src.type ){ // Plain object containing all event details
props = src;
} else { // Event string
this.type = src;
}
// Put explicitly provided properties onto the event object
if( props != null ){
// more efficient to manually copy fields we use
this.originalEvent = props.originalEvent;
this.type = props.type != null ? props.type : this.type;
this.cy = props.cy;
this.target = props.target;
this.position = props.position;
this.renderedPosition = props.renderedPosition;
this.namespace = props.namespace;
this.layout = props.layout;
}
if( this.cy != null && this.position != null && this.renderedPosition == null ){
// create a rendered position based on the passed position
let pos = this.position;
let zoom = this.cy.zoom();
let pan = this.cy.pan();
this.renderedPosition = {
x: pos.x * zoom + pan.x,
y: pos.y * zoom + pan.y
};
}
// Create a timestamp if incoming event doesn't have one
this.timeStamp = src && src.timeStamp || Date.now();
},
preventDefault: function(){
this.isDefaultPrevented = returnTrue;
let e = this.originalEvent;
if( !e ){
return;
}
// if preventDefault exists run it on the original event
if( e.preventDefault ){
e.preventDefault();
}
},
stopPropagation: function(){
this.isPropagationStopped = returnTrue;
let e = this.originalEvent;
if( !e ){
return;
}
// if stopPropagation exists run it on the original event
if( e.stopPropagation ){
e.stopPropagation();
}
},
stopImmediatePropagation: function(){
this.isImmediatePropagationStopped = returnTrue;
this.stopPropagation();
},
isDefaultPrevented: returnFalse,
isPropagationStopped: returnFalse,
isImmediatePropagationStopped: returnFalse
};
export default Event;
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