First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/cytoscape/src/collection/degree.mjs

@@ -0,0 +1,119 @@
+import * as util from '../util/index.mjs';
+
+let elesfn = {};
+
+function defineDegreeFunction( callback ){
+  return function( includeLoops ){
+    let self = this;
+
+    if( includeLoops === undefined ){
+      includeLoops = true;
+    }
+
+    if( self.length === 0 ){ return; }
+
+    if( self.isNode() && !self.removed() ){
+      let degree = 0;
+      let node = self[0];
+      let connectedEdges = node._private.edges;
+
+      for( let i = 0; i < connectedEdges.length; i++ ){
+        let edge = connectedEdges[ i ];
+
+        if( !includeLoops && edge.isLoop() ){
+          continue;
+        }
+
+        degree += callback( node, edge );
+      }
+
+      return degree;
+    } else {
+      return;
+    }
+  };
+}
+
+util.extend( elesfn, {
+  degree: defineDegreeFunction( function( node, edge ){
+    if( edge.source().same( edge.target() ) ){
+      return 2;
+    } else {
+      return 1;
+    }
+  } ),
+
+  indegree: defineDegreeFunction( function( node, edge ){
+    if( edge.target().same( node ) ){
+      return 1;
+    } else {
+      return 0;
+    }
+  } ),
+
+  outdegree: defineDegreeFunction( function( node, edge ){
+    if( edge.source().same( node ) ){
+      return 1;
+    } else {
+      return 0;
+    }
+  } )
+} );
+
+function defineDegreeBoundsFunction( degreeFn, callback ){
+  return function( includeLoops ){
+    let ret;
+    let nodes = this.nodes();
+
+    for( let i = 0; i < nodes.length; i++ ){
+      let ele = nodes[ i ];
+      let degree = ele[ degreeFn ]( includeLoops );
+      if( degree !== undefined && (ret === undefined || callback( degree, ret )) ){
+        ret = degree;
+      }
+    }
+
+    return ret;
+  };
+}
+
+util.extend( elesfn, {
+  minDegree: defineDegreeBoundsFunction( 'degree', function( degree, min ){
+    return degree < min;
+  } ),
+
+  maxDegree: defineDegreeBoundsFunction( 'degree', function( degree, max ){
+    return degree > max;
+  } ),
+
+  minIndegree: defineDegreeBoundsFunction( 'indegree', function( degree, min ){
+    return degree < min;
+  } ),
+
+  maxIndegree: defineDegreeBoundsFunction( 'indegree', function( degree, max ){
+    return degree > max;
+  } ),
+
+  minOutdegree: defineDegreeBoundsFunction( 'outdegree', function( degree, min ){
+    return degree < min;
+  } ),
+
+  maxOutdegree: defineDegreeBoundsFunction( 'outdegree', function( degree, max ){
+    return degree > max;
+  } )
+} );
+
+util.extend( elesfn, {
+  totalDegree: function( includeLoops ){
+    let total = 0;
+    let nodes = this.nodes();
+
+    for( let i = 0; i < nodes.length; i++ ){
+      total += nodes[ i ].degree( includeLoops );
+    }
+
+    return total;
+  }
+} );
+
+export default elesfn;