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import * as util from '../../util';
import * as is from '../../is';
import { copyPosition } from '../../math';
let defaults = {
positions: undefined, // map of (node id) => (position obj); or function(node){ return somPos; }
zoom: undefined, // the zoom level to set (prob want fit = false if set)
pan: undefined, // the pan level to set (prob want fit = false if set)
fit: true, // whether to fit to viewport
padding: 30, // padding on fit
spacingFactor: undefined, // Applies a multiplicative factor (>0) to expand or compress the overall area that the nodes take up
animate: false, // whether to transition the node positions
animationDuration: 500, // duration of animation in ms if enabled
animationEasing: undefined, // easing of animation if enabled
animateFilter: function ( node, i ){ return true; }, // a function that determines whether the node should be animated. All nodes animated by default on animate enabled. Non-animated nodes are positioned immediately when the layout starts
ready: undefined, // callback on layoutready
stop: undefined, // callback on layoutstop
transform: function (node, position ){ return position; } // transform a given node position. Useful for changing flow direction in discrete layouts
};
function PresetLayout( options ){
this.options = util.extend( {}, defaults, options );
}
PresetLayout.prototype.run = function(){
let options = this.options;
let eles = options.eles;
let nodes = eles.nodes();
let posIsFn = is.fn( options.positions );
function getPosition( node ){
if( options.positions == null ){
return copyPosition( node.position() );
}
if( posIsFn ){
return options.positions( node );
}
let pos = options.positions[ node._private.data.id ];
if( pos == null ){
return null;
}
return pos;
}
nodes.layoutPositions( this, options, function( node, i ){
let position = getPosition( node );
if( node.locked() || position == null ){
return false;
}
return position;
} );
return this; // chaining
};
export default PresetLayout;
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