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import * as is from '../is' ;
import zIndexSort from './zsort' ;
import * as util from '../util';
let elesfn = ({
forEach: function( fn, thisArg ){
if( is.fn( fn ) ){
let N = this.length;
for( let i = 0; i < N; i++ ){
let ele = this[ i ];
let ret = thisArg ? fn.apply( thisArg, [ ele, i, this ] ) : fn( ele, i, this );
if( ret === false ){ break; } // exit each early on return false
}
}
return this;
},
toArray: function(){
let array = [];
for( let i = 0; i < this.length; i++ ){
array.push( this[ i ] );
}
return array;
},
slice: function( start, end ){
let array = [];
let thisSize = this.length;
if( end == null ){
end = thisSize;
}
if( start == null ){
start = 0;
}
if( start < 0 ){
start = thisSize + start;
}
if( end < 0 ){
end = thisSize + end;
}
for( let i = start; i >= 0 && i < end && i < thisSize; i++ ){
array.push( this[ i ] );
}
return this.spawn( array );
},
size: function(){
return this.length;
},
eq: function( i ){
return this[ i ] || this.spawn();
},
first: function(){
return this[0] || this.spawn();
},
last: function(){
return this[ this.length - 1 ] || this.spawn();
},
empty: function(){
return this.length === 0;
},
nonempty: function(){
return !this.empty();
},
sort: function( sortFn ){
if( !is.fn( sortFn ) ){
return this;
}
let sorted = this.toArray().sort( sortFn );
return this.spawn( sorted );
},
sortByZIndex: function(){
return this.sort( zIndexSort );
},
zDepth: function(){
let ele = this[0];
if( !ele ){ return undefined; }
// let cy = ele.cy();
let _p = ele._private;
let group = _p.group;
if( group === 'nodes' ){
let depth = _p.data.parent ? ele.parents().size() : 0;
if( !ele.isParent() ){
return util.MAX_INT - 1; // childless nodes always on top
}
return depth;
} else {
let src = _p.source;
let tgt = _p.target;
let srcDepth = src.zDepth();
let tgtDepth = tgt.zDepth();
return Math.max( srcDepth, tgtDepth, 0 ); // depth of deepest parent
}
}
});
elesfn.each = elesfn.forEach;
const defineSymbolIterator = () => {
const typeofUndef = typeof undefined;
const isIteratorSupported = typeof Symbol != typeofUndef && typeof Symbol.iterator != typeofUndef; // eslint-disable-line no-undef
if (isIteratorSupported) {
elesfn[Symbol.iterator] = function() { // eslint-disable-line no-undef
let entry = { value: undefined, done: false };
let i = 0;
let length = this.length;
return {
next: () => {
if ( i < length ) {
entry.value = this[i++];
} else {
entry.value = undefined;
entry.done = true;
}
return entry;
},
[Symbol.iterator]: function() { // eslint-disable-line no-undef
return this;
}
};
};
}
};
defineSymbolIterator();
export default elesfn;
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