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import * as util from '../util';
import Promise from '../promise';
import * as math from '../math';
const getLayoutDimensionOptions = util.defaults({
nodeDimensionsIncludeLabels: false
});
let elesfn = ({
// Calculates and returns node dimensions { x, y } based on options given
layoutDimensions: function( options ){
options = getLayoutDimensionOptions( options );
let dims;
if( !this.takesUpSpace() ){
dims = { w: 0, h: 0 };
} else if( options.nodeDimensionsIncludeLabels ){
let bbDim = this.boundingBox();
dims = {
w: bbDim.w,
h: bbDim.h
};
} else {
dims = {
w: this.outerWidth(),
h: this.outerHeight()
};
}
// sanitise the dimensions for external layouts (avoid division by zero)
if( dims.w === 0 || dims.h === 0 ){
dims.w = dims.h = 1;
}
return dims;
},
// using standard layout options, apply position function (w/ or w/o animation)
layoutPositions: function( layout, options, fn ){
let nodes = this.nodes().filter(n => !n.isParent());
let cy = this.cy();
let layoutEles = options.eles; // nodes & edges
let getMemoizeKey = node => node.id();
let fnMem = util.memoize( fn, getMemoizeKey ); // memoized version of position function
layout.emit( { type: 'layoutstart', layout: layout } );
layout.animations = [];
let calculateSpacing = function( spacing, nodesBb, pos ){
let center = {
x: nodesBb.x1 + nodesBb.w / 2,
y: nodesBb.y1 + nodesBb.h / 2
};
let spacingVector = { // scale from center of bounding box (not necessarily 0,0)
x: (pos.x - center.x) * spacing,
y: (pos.y - center.y) * spacing
};
return {
x: center.x + spacingVector.x,
y: center.y + spacingVector.y
};
};
let useSpacingFactor = options.spacingFactor && options.spacingFactor !== 1;
let spacingBb = function(){
if( !useSpacingFactor ){ return null; }
let bb = math.makeBoundingBox();
for( let i = 0; i < nodes.length; i++ ){
let node = nodes[i];
let pos = fnMem( node, i );
math.expandBoundingBoxByPoint( bb, pos.x, pos.y );
}
return bb;
};
let bb = spacingBb();
let getFinalPos = util.memoize( function( node, i ){
let newPos = fnMem( node, i );
if( useSpacingFactor ){
let spacing = Math.abs( options.spacingFactor );
newPos = calculateSpacing( spacing, bb, newPos );
}
if( options.transform != null ){
newPos = options.transform( node, newPos );
}
return newPos;
}, getMemoizeKey );
if( options.animate ){
for( let i = 0; i < nodes.length; i++ ){
let node = nodes[ i ];
let newPos = getFinalPos( node, i );
let animateNode = options.animateFilter == null || options.animateFilter( node, i );
if( animateNode ){
let ani = node.animation( {
position: newPos,
duration: options.animationDuration,
easing: options.animationEasing
} );
layout.animations.push( ani );
} else {
node.position( newPos );
}
}
if( options.fit ){
let fitAni = cy.animation({
fit: {
boundingBox: layoutEles.boundingBoxAt( getFinalPos ),
padding: options.padding
},
duration: options.animationDuration,
easing: options.animationEasing
});
layout.animations.push( fitAni );
} else if( options.zoom !== undefined && options.pan !== undefined ){
let zoomPanAni = cy.animation({
zoom: options.zoom,
pan: options.pan,
duration: options.animationDuration,
easing: options.animationEasing
});
layout.animations.push( zoomPanAni );
}
layout.animations.forEach(ani => ani.play());
layout.one( 'layoutready', options.ready );
layout.emit( { type: 'layoutready', layout: layout } );
Promise.all( layout.animations.map(function( ani ){
return ani.promise();
}) ).then(function(){
layout.one( 'layoutstop', options.stop );
layout.emit( { type: 'layoutstop', layout: layout } );
});
} else {
nodes.positions( getFinalPos );
if( options.fit ){
cy.fit( options.eles, options.padding );
}
if( options.zoom != null ){
cy.zoom( options.zoom );
}
if( options.pan ){
cy.pan( options.pan );
}
layout.one( 'layoutready', options.ready );
layout.emit( { type: 'layoutready', layout: layout } );
layout.one( 'layoutstop', options.stop );
layout.emit( { type: 'layoutstop', layout: layout } );
}
return this; // chaining
},
layout: function( options ){
let cy = this.cy();
return cy.makeLayout( util.extend( {}, options, {
eles: this
} ) );
}
});
// aliases:
elesfn.createLayout = elesfn.makeLayout = elesfn.layout;
export default elesfn;
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