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/*!
Copyright (c) The Cytoscape Consortium
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the “Software”), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
;(function(){ 'use strict';
// registers the extension on a cytoscape lib ref
var register = function( cytoscape, dagre ){
if( !cytoscape || !dagre ){ return; } // can't register if cytoscape unspecified
var isFunction = function(o){ return typeof o === 'function'; };
// default layout options
var defaults = {
// dagre algo options, uses default value on undefined
nodeSep: undefined, // the separation between adjacent nodes in the same rank
edgeSep: undefined, // the separation between adjacent edges in the same rank
rankSep: undefined, // the separation between adjacent nodes in the same rank
rankDir: undefined, // 'TB' for top to bottom flow, 'LR' for left to right
minLen: function( edge ){ return 1; }, // number of ranks to keep between the source and target of the edge
edgeWeight: function( edge ){ return 1; }, // higher weight edges are generally made shorter and straighter than lower weight edges
// general layout options
fit: true, // whether to fit to viewport
padding: 30, // fit padding
animate: false, // whether to transition the node positions
animationDuration: 500, // duration of animation in ms if enabled
animationEasing: undefined, // easing of animation if enabled
boundingBox: undefined, // constrain layout bounds; { x1, y1, x2, y2 } or { x1, y1, w, h }
ready: function(){}, // on layoutready
stop: function(){} // on layoutstop
};
// constructor
// options : object containing layout options
function DagreLayout( options ){
var opts = this.options = {};
for( var i in defaults ){ opts[i] = defaults[i]; }
for( var i in options ){ opts[i] = options[i]; }
}
// runs the layout
DagreLayout.prototype.run = function(){
var options = this.options;
var layout = this;
var cy = options.cy; // cy is automatically populated for us in the constructor
var eles = options.eles;
var getVal = function( ele, val ){
return isFunction(val) ? val.apply( ele, [ ele ] ) : val;
};
var bb = options.boundingBox || { x1: 0, y1: 0, w: cy.width(), h: cy.height() };
if( bb.x2 === undefined ){ bb.x2 = bb.x1 + bb.w; }
if( bb.w === undefined ){ bb.w = bb.x2 - bb.x1; }
if( bb.y2 === undefined ){ bb.y2 = bb.y1 + bb.h; }
if( bb.h === undefined ){ bb.h = bb.y2 - bb.y1; }
var g = new dagre.graphlib.Graph({
multigraph: true,
compound: true
});
var gObj = {};
var setGObj = function( name, val ){
if( val != null ){
gObj[ name ] = val;
}
};
setGObj( 'nodesep', options.nodeSep );
setGObj( 'edgesep', options.edgeSep );
setGObj( 'ranksep', options.rankSep );
setGObj( 'rankdir', options.rankDir );
g.setGraph( gObj );
g.setDefaultEdgeLabel(function() { return {}; });
g.setDefaultNodeLabel(function() { return {}; });
// add nodes to dagre
var nodes = eles.nodes();
for( var i = 0; i < nodes.length; i++ ){
var node = nodes[i];
var nbb = node.boundingBox();
g.setNode( node.id(), {
width: nbb.w,
height: nbb.h,
name: node.id()
} );
// console.log( g.node(node.id()) );
}
// set compound parents
for( var i = 0; i < nodes.length; i++ ){
var node = nodes[i];
if( node.isChild() ){
g.setParent( node.id(), node.parent().id() );
}
}
// add edges to dagre
var edges = eles.edges().stdFilter(function( edge ){
return !edge.source().isParent() && !edge.target().isParent(); // dagre can't handle edges on compound nodes
});
for( var i = 0; i < edges.length; i++ ){
var edge = edges[i];
g.setEdge( edge.source().id(), edge.target().id(), {
minlen: getVal( edge, options.minLen ),
weight: getVal( edge, options.edgeWeight ),
name: edge.id()
}, edge.id() );
// console.log( g.edge(edge.source().id(), edge.target().id(), edge.id()) );
}
dagre.layout( g );
var gNodeIds = g.nodes();
for( var i = 0; i < gNodeIds.length; i++ ){
var id = gNodeIds[i];
var n = g.node( id );
cy.getElementById(id).scratch().dagre = n;
}
var dagreBB;
if( options.boundingBox ){
dagreBB = { x1: Infinity, x2: -Infinity, y1: Infinity, y2: -Infinity };
nodes.forEach(function( node ){
var dModel = node.scratch().dagre;
dagreBB.x1 = Math.min( dagreBB.x1, dModel.x );
dagreBB.x2 = Math.max( dagreBB.x2, dModel.x );
dagreBB.y1 = Math.min( dagreBB.y1, dModel.y );
dagreBB.y2 = Math.max( dagreBB.y2, dModel.y );
});
dagreBB.w = dagreBB.x2 - dagreBB.x1;
dagreBB.h = dagreBB.y2 - dagreBB.y1;
} else {
dagreBB = bb;
}
var constrainPos = function( p ){
if( options.boundingBox ){
var xPct = dagreBB.w === 0 ? 0 : (p.x - dagreBB.x1) / dagreBB.w;
var yPct = dagreBB.h === 0 ? 0 : (p.y - dagreBB.y1) / dagreBB.h;
return {
x: bb.x1 + xPct * bb.w,
y: bb.y1 + yPct * bb.h
};
} else {
return p;
}
};
nodes.layoutPositions(layout, options, function(){
var dModel = this.scratch().dagre;
return constrainPos({
x: dModel.x,
y: dModel.y
});
});
return this; // chaining
};
cytoscape('layout', 'dagre', DagreLayout);
};
if( typeof module !== 'undefined' && module.exports ){ // expose as a commonjs module
module.exports = register;
}
if( typeof define !== 'undefined' && define.amd ){ // expose as an amd/requirejs module
define('cytoscape-dagre', function(){
return register;
});
}
if( typeof cytoscape !== 'undefined' && typeof dagre !== 'undefined' ){ // expose to global cytoscape (i.e. window.cytoscape)
register( cytoscape, dagre );
}
})();
