完成世界书、骰子、apiconfig页面处理

This commit is contained in:
2026-04-30 01:35:10 +08:00
parent a3e3711b2b
commit ba9b925c32
4602 changed files with 785225 additions and 23 deletions

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frontend/node_modules/cytoscape-fcose/bower.json generated vendored Normal file
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{
"name": "cytoscape-fcose",
"description": "The fCoSE layout for Cytoscape.js by Bilkent with fast compound node placement",
"main": "cytoscape-fcose.js",
"dependencies": {
"cytoscape": "^3.2.0",
"cose-base": "^1.0.0"
},
"repository": {
"type": "git",
"url": "https://github.com/iVis-at-Bilkent/cytoscape.js-fcose.git"
},
"ignore": [
"**/.*",
"node_modules",
"bower_components",
"test",
"tests"
],
"keywords": [
"cytoscape",
"cytoscape-extension"
],
"license": "MIT"
}

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"relativePlacementConstraint": [
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}

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{
"presets": ["env"]
}

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{
"name": "cose-base",
"description": "Core module for compound spring embedder based layout styles",
"main": "cose-base.js",
"dependencies": {
"layout-base": "^1.0.0"
},
"repository": {
"type": "git",
"url": "https://github.com/iVis-at-Bilkent/cose-base.git"
},
"ignore": [
"**/.*",
"node_modules",
"bower_components",
"test",
"tests"
],
"keywords": [
"layout"
],
"license": "MIT"
}

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var LGraphManager = require('layout-base').LGraphManager;
function CoSEGraphManager(layout) {
LGraphManager.call(this, layout);
}
CoSEGraphManager.prototype = Object.create(LGraphManager.prototype);
for (var prop in LGraphManager) {
CoSEGraphManager[prop] = LGraphManager[prop];
}
module.exports = CoSEGraphManager;

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var CoSEConstants = require('./CoSEConstants');
var LinkedList = require('layout-base').LinkedList;
var Matrix = require('layout-base').Matrix;
var SVD = require('layout-base').SVD;
function ConstraintHandler() {
}
ConstraintHandler.handleConstraints = function (layout)
{
// let layout = this.graphManager.getLayout();
// get constraints from layout
let constraints = {};
constraints.fixedNodeConstraint = layout.constraints.fixedNodeConstraint;
constraints.alignmentConstraint = layout.constraints.alignmentConstraint;
constraints.relativePlacementConstraint = layout.constraints.relativePlacementConstraint;
let idToNodeMap = new Map();
let nodeIndexes = new Map();
let xCoords = [];
let yCoords = [];
let allNodes = layout.getAllNodes();
let index = 0;
// fill index map and coordinates
for (let i = 0; i < allNodes.length; i++) {
let node = allNodes[i];
if (node.getChild() == null) {
nodeIndexes.set(node.id, index++);
xCoords.push(node.getCenterX());
yCoords.push(node.getCenterY());
idToNodeMap.set(node.id, node);
}
}
// if there exists relative placement constraint without gap value, set it to default
if (constraints.relativePlacementConstraint) {
constraints.relativePlacementConstraint.forEach(function(constraint) {
if (!constraint.gap && constraint.gap != 0) {
if (constraint.left) {
constraint.gap = CoSEConstants.DEFAULT_EDGE_LENGTH + idToNodeMap.get(constraint.left).getWidth()/2 + idToNodeMap.get(constraint.right).getWidth()/2;
}
else {
constraint.gap = CoSEConstants.DEFAULT_EDGE_LENGTH + idToNodeMap.get(constraint.top).getHeight()/2 + idToNodeMap.get(constraint.bottom).getHeight()/2;
}
}
});
}
/* auxiliary functions */
// calculate difference between two position objects
let calculatePositionDiff = function(pos1, pos2) {
return {x: pos1.x - pos2.x, y: pos1.y - pos2.y};
};
// calculate average position of the nodes
let calculateAvgPosition = function(nodeIdSet) {
let xPosSum = 0;
let yPosSum = 0;
nodeIdSet.forEach(function(nodeId) {
xPosSum += xCoords[nodeIndexes.get(nodeId)];
yPosSum += yCoords[nodeIndexes.get(nodeId)];
});
return {x: xPosSum / nodeIdSet.size, y: yPosSum / nodeIdSet.size};
};
// find an appropriate positioning for the nodes in a given graph according to relative placement constraints
// this function also takes the fixed nodes and alignment constraints into account
// graph: dag to be evaluated, direction: "horizontal" or "vertical",
// fixedNodes: set of fixed nodes to consider during evaluation, dummyPositions: appropriate coordinates of the dummy nodes
let findAppropriatePositionForRelativePlacement = function(graph, direction, fixedNodes, dummyPositions, componentSources) {
// find union of two sets
function setUnion(setA, setB) {
let union = new Set(setA);
for (let elem of setB) {
union.add(elem);
}
return union;
}
// find indegree count for each node
let inDegrees = new Map();
graph.forEach(function(value, key) {
inDegrees.set(key, 0);
});
graph.forEach(function(value, key) {
value.forEach(function(adjacent) {
inDegrees.set(adjacent.id, inDegrees.get(adjacent.id) + 1);
});
});
let positionMap = new Map(); // keeps the position for each node
let pastMap = new Map(); // keeps the predecessors(past) of a node
let queue = new LinkedList();
inDegrees.forEach(function(value, key) {
if (value == 0) {
queue.push(key);
if (!fixedNodes) {
if (direction == "horizontal") {
positionMap.set(key, nodeIndexes.has(key) ? xCoords[nodeIndexes.get(key)] : dummyPositions.get(key));
}
else {
positionMap.set(key, nodeIndexes.has(key) ? yCoords[nodeIndexes.get(key)] : dummyPositions.get(key));
}
}
}
else {
positionMap.set(key, Number.NEGATIVE_INFINITY);
}
if (fixedNodes) {
pastMap.set(key, new Set([key]));
}
});
// align sources of each component in enforcement phase
if (fixedNodes) {
componentSources.forEach(function(component) {
let fixedIds = [];
component.forEach(function(nodeId) {
if (fixedNodes.has(nodeId)) {
fixedIds.push(nodeId);
}
});
if (fixedIds.length > 0) {
let position = 0;
fixedIds.forEach(function(fixedId) {
if (direction == "horizontal") {
positionMap.set(fixedId, nodeIndexes.has(fixedId) ? xCoords[nodeIndexes.get(fixedId)] : dummyPositions.get(fixedId));
position += positionMap.get(fixedId);
}
else {
positionMap.set(fixedId, nodeIndexes.has(fixedId) ? yCoords[nodeIndexes.get(fixedId)] : dummyPositions.get(fixedId));
position += positionMap.get(fixedId);
}
});
position = position / fixedIds.length;
component.forEach(function(nodeId) {
if (!fixedNodes.has(nodeId)) {
positionMap.set(nodeId, position);
}
});
}
else {
let position = 0;
component.forEach(function(nodeId) {
if (direction == "horizontal") {
position += nodeIndexes.has(nodeId) ? xCoords[nodeIndexes.get(nodeId)] : dummyPositions.get(nodeId);
}
else {
position += nodeIndexes.has(nodeId) ? yCoords[nodeIndexes.get(nodeId)] : dummyPositions.get(nodeId);
}
});
position = position / component.length;
component.forEach(function(nodeId) {
positionMap.set(nodeId, position);
});
}
});
}
// calculate positions of the nodes
while (queue.length != 0) {
let currentNode = queue.shift();
let neighbors = graph.get(currentNode);
neighbors.forEach(function(neighbor) {
if (positionMap.get(neighbor.id) < (positionMap.get(currentNode) + neighbor.gap)) {
if (fixedNodes && fixedNodes.has(neighbor.id)) {
let fixedPosition;
if (direction == "horizontal") {
fixedPosition = nodeIndexes.has(neighbor.id) ? xCoords[nodeIndexes.get(neighbor.id)] : dummyPositions.get(neighbor.id);
}
else {
fixedPosition = nodeIndexes.has(neighbor.id) ? yCoords[nodeIndexes.get(neighbor.id)] : dummyPositions.get(neighbor.id);
}
positionMap.set(neighbor.id, fixedPosition); // TODO: may do unnecessary work
if (fixedPosition < (positionMap.get(currentNode) + neighbor.gap)) {
let diff = (positionMap.get(currentNode) + neighbor.gap) - fixedPosition;
pastMap.get(currentNode).forEach(function(nodeId) {
positionMap.set(nodeId, positionMap.get(nodeId) - diff);
});
}
}
else {
positionMap.set(neighbor.id, positionMap.get(currentNode) + neighbor.gap);
}
}
inDegrees.set(neighbor.id, inDegrees.get(neighbor.id) - 1);
if (inDegrees.get(neighbor.id) == 0) {
queue.push(neighbor.id);
}
if (fixedNodes) {
pastMap.set(neighbor.id, setUnion(pastMap.get(currentNode), pastMap.get(neighbor.id)));
}
});
}
// readjust position of the nodes after enforcement
if (fixedNodes) {
// find indegree count for each node
let sinkNodes = new Set();
graph.forEach(function(value, key) {
if (value.length == 0) {
sinkNodes.add(key);
}
});
let components = [];
pastMap.forEach(function(value, key) {
if (sinkNodes.has(key)) {
let isFixedComponent = false;
for (let nodeId of value) {
if (fixedNodes.has(nodeId)) {
isFixedComponent = true;
}
}
if (!isFixedComponent) {
let isExist = false;
let existAt;
components.forEach(function(component, index) {
if (component.has([...value][0])) {
isExist = true;
existAt = index;
}
});
if (!isExist) {
components.push(new Set(value));
}
else {
value.forEach(function(ele) {
components[existAt].add(ele);
});
}
}
}
});
components.forEach(function(component, index) {
let minBefore = Number.POSITIVE_INFINITY;
let minAfter = Number.POSITIVE_INFINITY;
let maxBefore = Number.NEGATIVE_INFINITY;
let maxAfter = Number.NEGATIVE_INFINITY;
for (let nodeId of component) {
let posBefore;
if (direction == "horizontal") {
posBefore = nodeIndexes.has(nodeId) ? xCoords[nodeIndexes.get(nodeId)] : dummyPositions.get(nodeId);
}
else {
posBefore = nodeIndexes.has(nodeId) ? yCoords[nodeIndexes.get(nodeId)] : dummyPositions.get(nodeId);
}
let posAfter = positionMap.get(nodeId);
if (posBefore < minBefore) {
minBefore = posBefore;
}
if (posBefore > maxBefore) {
maxBefore = posBefore;
}
if (posAfter < minAfter) {
minAfter = posAfter;
}
if (posAfter > maxAfter) {
maxAfter = posAfter;
}
}
let diff = (minBefore + maxBefore) / 2 - (minAfter + maxAfter) / 2;
for (let nodeId of component) {
positionMap.set(nodeId, positionMap.get(nodeId) + diff);
}
});
}
return positionMap;
};
// find transformation based on rel. placement constraints if there are both alignment and rel. placement constraints
// or if there are only rel. placement contraints where the largest component isn't sufficiently large
let applyReflectionForRelativePlacement = function (relativePlacementConstraints) {
// variables to count votes
let reflectOnY = 0, notReflectOnY = 0;
let reflectOnX = 0, notReflectOnX = 0;
relativePlacementConstraints.forEach(function(constraint) {
if (constraint.left) {
(xCoords[nodeIndexes.get(constraint.left)] - xCoords[nodeIndexes.get(constraint.right)] >= 0) ? reflectOnY++ : notReflectOnY++;
}
else {
(yCoords[nodeIndexes.get(constraint.top)] - yCoords[nodeIndexes.get(constraint.bottom)] >= 0) ? reflectOnX++ : notReflectOnX++;
}
});
if (reflectOnY > notReflectOnY && reflectOnX > notReflectOnX) {
for (let i = 0; i < nodeIndexes.size; i++) {
xCoords[i] = -1 * xCoords[i];
yCoords[i] = -1 * yCoords[i];
}
}
else if (reflectOnY > notReflectOnY) {
for (let i = 0; i < nodeIndexes.size; i++) {
xCoords[i] = -1 * xCoords[i];
}
}
else if (reflectOnX > notReflectOnX) {
for (let i = 0; i < nodeIndexes.size; i++) {
yCoords[i] = -1 * yCoords[i];
}
}
};
// find weakly connected components in undirected graph
let findComponents = function(graph) {
// find weakly connected components in dag
let components = [];
let queue = new LinkedList();
let visited = new Set();
let count = 0;
graph.forEach(function(value, key) {
if (!visited.has(key)) {
components[count] = [];
let currentNode = key;
queue.push(currentNode);
visited.add(currentNode);
components[count].push(currentNode);
while (queue.length != 0) {
currentNode = queue.shift();
let neighbors = graph.get(currentNode);
neighbors.forEach(function(neighbor) {
if (!visited.has(neighbor.id)) {
queue.push(neighbor.id);
visited.add(neighbor.id);
components[count].push(neighbor.id);
}
});
}
count++;
}
});
return components;
};
// return undirected version of given dag
let dagToUndirected = function(dag) {
let undirected = new Map();
dag.forEach(function(value, key) {
undirected.set(key, []);
});
dag.forEach(function(value, key) {
value.forEach(function(adjacent) {
undirected.get(key).push(adjacent);
undirected.get(adjacent.id).push({id: key, gap: adjacent.gap, direction: adjacent.direction});
});
});
return undirected;
};
// return reversed (directions inverted) version of given dag
let dagToReversed = function(dag) {
let reversed = new Map();
dag.forEach(function(value, key) {
reversed.set(key, []);
});
dag.forEach(function(value, key) {
value.forEach(function(adjacent) {
reversed.get(adjacent.id).push({id: key, gap: adjacent.gap, direction: adjacent.direction});
});
});
return reversed;
};
/**** apply transformation to the initial draft layout to better align with constrained nodes ****/
// solve the Orthogonal Procrustean Problem to rotate and/or reflect initial draft layout
// here we follow the solution in Chapter 20.2 of Borg, I. & Groenen, P. (2005) Modern Multidimensional Scaling: Theory and Applications
/* construct source and target configurations */
let targetMatrix = []; // A - target configuration
let sourceMatrix = []; // B - source configuration
let standardTransformation = false; // false for no transformation, true for standart (Procrustes) transformation (rotation and/or reflection)
let reflectionType = false; // false/true for reflection check, 'reflectOnX', 'reflectOnY' or 'reflectOnBoth' for reflection type if necessary
let fixedNodes = new Set();
let dag = new Map(); // adjacency list to keep directed acyclic graph (dag) that consists of relative placement constraints
let dagUndirected = new Map(); // undirected version of the dag
let components = []; // weakly connected components
// fill fixedNodes collection to use later
if (constraints.fixedNodeConstraint) {
constraints.fixedNodeConstraint.forEach(function(nodeData) {
fixedNodes.add(nodeData.nodeId);
});
}
// construct dag from relative placement constraints
if (constraints.relativePlacementConstraint) {
// construct both directed and undirected version of the dag
constraints.relativePlacementConstraint.forEach(function(constraint) {
if (constraint.left) {
if (dag.has(constraint.left)) {
dag.get(constraint.left).push({id: constraint.right, gap: constraint.gap, direction: "horizontal"});
}
else {
dag.set(constraint.left, [{id: constraint.right, gap: constraint.gap, direction: "horizontal"}]);
}
if (!dag.has(constraint.right)) {
dag.set(constraint.right, []);
}
}
else {
if (dag.has(constraint.top)) {
dag.get(constraint.top).push({id: constraint.bottom, gap: constraint.gap, direction: "vertical"});
}
else {
dag.set(constraint.top, [{id: constraint.bottom, gap: constraint.gap, direction: "vertical"}]);
}
if (!dag.has(constraint.bottom)) {
dag.set(constraint.bottom, []);
}
}
});
dagUndirected = dagToUndirected(dag);
components = findComponents(dagUndirected);
}
if (CoSEConstants.TRANSFORM_ON_CONSTRAINT_HANDLING) {
// first check fixed node constraint
if (constraints.fixedNodeConstraint && constraints.fixedNodeConstraint.length > 1) {
constraints.fixedNodeConstraint.forEach(function(nodeData, i) {
targetMatrix[i] = [nodeData.position.x, nodeData.position.y];
sourceMatrix[i] = [xCoords[nodeIndexes.get(nodeData.nodeId)], yCoords[nodeIndexes.get(nodeData.nodeId)]];
});
standardTransformation = true;
}
else if (constraints.alignmentConstraint) { // then check alignment constraint
let count = 0;
if (constraints.alignmentConstraint.vertical) {
let verticalAlign = constraints.alignmentConstraint.vertical;
for (let i = 0; i < verticalAlign.length; i++) {
let alignmentSet = new Set();
verticalAlign[i].forEach(function(nodeId) {
alignmentSet.add(nodeId);
});
let intersection = new Set([...alignmentSet].filter(x => fixedNodes.has(x)));
let xPos;
if (intersection.size > 0)
xPos = xCoords[nodeIndexes.get(intersection.values().next().value)];
else
xPos = calculateAvgPosition(alignmentSet).x;
verticalAlign[i].forEach(function(nodeId) {
targetMatrix[count] = [xPos, yCoords[nodeIndexes.get(nodeId)]];
sourceMatrix[count] = [xCoords[nodeIndexes.get(nodeId)], yCoords[nodeIndexes.get(nodeId)]];
count++;
});
}
standardTransformation = true;
}
if (constraints.alignmentConstraint.horizontal) {
let horizontalAlign = constraints.alignmentConstraint.horizontal;
for (let i = 0; i < horizontalAlign.length; i++) {
let alignmentSet = new Set();
horizontalAlign[i].forEach(function(nodeId) {
alignmentSet.add(nodeId);
});
let intersection = new Set([...alignmentSet].filter(x => fixedNodes.has(x)));
let yPos;
if (intersection.size > 0)
yPos = xCoords[nodeIndexes.get(intersection.values().next().value)];
else
yPos = calculateAvgPosition(alignmentSet).y;
horizontalAlign[i].forEach(function(nodeId) {
targetMatrix[count] = [xCoords[nodeIndexes.get(nodeId)], yPos];
sourceMatrix[count] = [xCoords[nodeIndexes.get(nodeId)], yCoords[nodeIndexes.get(nodeId)]];
count++;
});
}
standardTransformation = true;
}
if (constraints.relativePlacementConstraint) {
reflectionType = true;
}
}
else if (constraints.relativePlacementConstraint) { // finally check relative placement constraint
// find largest component in dag
let largestComponentSize = 0;
let largestComponentIndex = 0;
for (let i = 0; i < components.length; i++) {
if (components[i].length > largestComponentSize) {
largestComponentSize = components[i].length;
largestComponentIndex = i;
}
}
// if largest component isn't dominant, then take the votes for reflection
if (largestComponentSize < (dagUndirected.size / 2)) {
applyReflectionForRelativePlacement(constraints.relativePlacementConstraint);
standardTransformation = false;
reflectionType = false;
}
else { // use largest component for transformation
// construct horizontal and vertical subgraphs in the largest component
let subGraphOnHorizontal = new Map();
let subGraphOnVertical = new Map();
let constraintsInlargestComponent = [];
components[largestComponentIndex].forEach(function(nodeId) {
dag.get(nodeId).forEach(function(adjacent) {
if (adjacent.direction == "horizontal") {
if (subGraphOnHorizontal.has(nodeId)) {
subGraphOnHorizontal.get(nodeId).push(adjacent);
}
else {
subGraphOnHorizontal.set(nodeId, [adjacent]);
}
if (!subGraphOnHorizontal.has(adjacent.id)) {
subGraphOnHorizontal.set(adjacent.id, []);
}
constraintsInlargestComponent.push({left: nodeId, right: adjacent.id});
}
else {
if (subGraphOnVertical.has(nodeId)) {
subGraphOnVertical.get(nodeId).push(adjacent);
}
else {
subGraphOnVertical.set(nodeId, [adjacent]);
}
if (!subGraphOnVertical.has(adjacent.id)) {
subGraphOnVertical.set(adjacent.id, []);
}
constraintsInlargestComponent.push({top: nodeId, bottom: adjacent.id});
}
});
});
applyReflectionForRelativePlacement(constraintsInlargestComponent);
reflectionType = false;
// calculate appropriate positioning for subgraphs
let positionMapHorizontal = findAppropriatePositionForRelativePlacement(subGraphOnHorizontal, "horizontal");
let positionMapVertical = findAppropriatePositionForRelativePlacement(subGraphOnVertical, "vertical");
// construct source and target configuration
components[largestComponentIndex].forEach(function(nodeId, i) {
sourceMatrix[i] = [xCoords[nodeIndexes.get(nodeId)], yCoords[nodeIndexes.get(nodeId)]];
targetMatrix[i] = [];
if (positionMapHorizontal.has(nodeId)) {
targetMatrix[i][0] = positionMapHorizontal.get(nodeId);
}
else {
targetMatrix[i][0] = xCoords[nodeIndexes.get(nodeId)];
}
if (positionMapVertical.has(nodeId)) {
targetMatrix[i][1] = positionMapVertical.get(nodeId);
}
else {
targetMatrix[i][1] = yCoords[nodeIndexes.get(nodeId)];
}
});
standardTransformation = true;
}
}
// if transformation is required, then calculate and apply transformation matrix
if (standardTransformation) {
/* calculate transformation matrix */
let transformationMatrix;
let targetMatrixTranspose = Matrix.transpose(targetMatrix); // A'
let sourceMatrixTranspose = Matrix.transpose(sourceMatrix); // B'
// centralize transpose matrices
for (let i = 0; i < targetMatrixTranspose.length; i++) {
targetMatrixTranspose[i] = Matrix.multGamma(targetMatrixTranspose[i]);
sourceMatrixTranspose[i] = Matrix.multGamma(sourceMatrixTranspose[i]);
}
// do actual calculation for transformation matrix
let tempMatrix = Matrix.multMat(targetMatrixTranspose, Matrix.transpose(sourceMatrixTranspose)); // tempMatrix = A'B
let SVDResult = SVD.svd(tempMatrix); // SVD(A'B) = USV', svd function returns U, S and V
transformationMatrix = Matrix.multMat(SVDResult.V, Matrix.transpose(SVDResult.U)); // transformationMatrix = T = VU'
/* apply found transformation matrix to obtain final draft layout */
for (let i = 0; i < nodeIndexes.size; i++) {
let temp1 = [xCoords[i], yCoords[i]];
let temp2 = [transformationMatrix[0][0], transformationMatrix[1][0]];
let temp3 = [transformationMatrix[0][1], transformationMatrix[1][1]];
xCoords[i] = Matrix.dotProduct(temp1, temp2);
yCoords[i] = Matrix.dotProduct(temp1, temp3);
}
// applied only both alignment and rel. placement constraints exist
if (reflectionType) {
applyReflectionForRelativePlacement(constraints.relativePlacementConstraint);
}
}
}
if (CoSEConstants.ENFORCE_CONSTRAINTS) {
/**** enforce constraints on the transformed draft layout ****/
/* first enforce fixed node constraint */
if (constraints.fixedNodeConstraint && constraints.fixedNodeConstraint.length > 0) {
let translationAmount = { x: 0, y: 0 };
constraints.fixedNodeConstraint.forEach(function(nodeData, i) {
let posInTheory = {x: xCoords[nodeIndexes.get(nodeData.nodeId)], y: yCoords[nodeIndexes.get(nodeData.nodeId)]};
let posDesired = nodeData.position;
let posDiff = calculatePositionDiff(posDesired, posInTheory);
translationAmount.x += posDiff.x;
translationAmount.y += posDiff.y;
});
translationAmount.x /= constraints.fixedNodeConstraint.length;
translationAmount.y /= constraints.fixedNodeConstraint.length;
xCoords.forEach(function(value, i) {
xCoords[i] += translationAmount.x;
});
yCoords.forEach(function(value, i) {
yCoords[i] += translationAmount.y;
});
constraints.fixedNodeConstraint.forEach(function(nodeData) {
xCoords[nodeIndexes.get(nodeData.nodeId)] = nodeData.position.x;
yCoords[nodeIndexes.get(nodeData.nodeId)] = nodeData.position.y;
});
}
/* then enforce alignment constraint */
if (constraints.alignmentConstraint) {
if (constraints.alignmentConstraint.vertical) {
let xAlign = constraints.alignmentConstraint.vertical;
for (let i = 0; i < xAlign.length; i++) {
let alignmentSet = new Set();
xAlign[i].forEach(function(nodeId) {
alignmentSet.add(nodeId);
});
let intersection = new Set([...alignmentSet].filter(x => fixedNodes.has(x)));
let xPos;
if (intersection.size > 0)
xPos = xCoords[nodeIndexes.get(intersection.values().next().value)];
else
xPos = calculateAvgPosition(alignmentSet).x;
alignmentSet.forEach(function(nodeId) {
if (!fixedNodes.has(nodeId))
xCoords[nodeIndexes.get(nodeId)] = xPos;
});
}
}
if (constraints.alignmentConstraint.horizontal) {
let yAlign = constraints.alignmentConstraint.horizontal;
for (let i = 0; i < yAlign.length; i++) {
let alignmentSet = new Set();
yAlign[i].forEach(function(nodeId) {
alignmentSet.add(nodeId);
});
let intersection = new Set([...alignmentSet].filter(x => fixedNodes.has(x)));
let yPos;
if (intersection.size > 0)
yPos = yCoords[nodeIndexes.get(intersection.values().next().value)];
else
yPos = calculateAvgPosition(alignmentSet).y;
alignmentSet.forEach(function(nodeId) {
if (!fixedNodes.has(nodeId))
yCoords[nodeIndexes.get(nodeId)] = yPos;
});
}
}
}
/* finally enforce relative placement constraint */
if (constraints.relativePlacementConstraint) {
let nodeToDummyForVerticalAlignment = new Map();
let nodeToDummyForHorizontalAlignment = new Map();
let dummyToNodeForVerticalAlignment = new Map();
let dummyToNodeForHorizontalAlignment = new Map();
let dummyPositionsForVerticalAlignment = new Map();
let dummyPositionsForHorizontalAlignment = new Map();
let fixedNodesOnHorizontal = new Set();
let fixedNodesOnVertical = new Set();
// fill maps and sets
fixedNodes.forEach(function(nodeId) {
fixedNodesOnHorizontal.add(nodeId);
fixedNodesOnVertical.add(nodeId);
});
if (constraints.alignmentConstraint) {
if (constraints.alignmentConstraint.vertical) {
let verticalAlignment = constraints.alignmentConstraint.vertical;
for (let i = 0; i < verticalAlignment.length; i++) {
dummyToNodeForVerticalAlignment.set("dummy" + i, []);
verticalAlignment[i].forEach(function(nodeId) {
nodeToDummyForVerticalAlignment.set(nodeId, "dummy" + i);
dummyToNodeForVerticalAlignment.get("dummy" + i).push(nodeId);
if (fixedNodes.has(nodeId)) {
fixedNodesOnHorizontal.add("dummy" + i);
}
});
dummyPositionsForVerticalAlignment.set("dummy" + i, xCoords[nodeIndexes.get(verticalAlignment[i][0])]);
}
}
if (constraints.alignmentConstraint.horizontal) {
let horizontalAlignment = constraints.alignmentConstraint.horizontal;
for (let i = 0; i < horizontalAlignment.length; i++) {
dummyToNodeForHorizontalAlignment.set("dummy" + i, []);
horizontalAlignment[i].forEach(function(nodeId) {
nodeToDummyForHorizontalAlignment.set(nodeId, "dummy" + i);
dummyToNodeForHorizontalAlignment.get("dummy" + i).push(nodeId);
if (fixedNodes.has(nodeId)) {
fixedNodesOnVertical.add("dummy" + i);
}
});
dummyPositionsForHorizontalAlignment.set("dummy" + i, yCoords[nodeIndexes.get(horizontalAlignment[i][0])]);
}
}
}
// construct horizontal and vertical dags (subgraphs) from overall dag
let dagOnHorizontal = new Map();
let dagOnVertical = new Map();
for (let nodeId of dag.keys()) {
dag.get(nodeId).forEach(function(adjacent) {
let sourceId;
let targetNode;
if (adjacent["direction"] == "horizontal") {
sourceId = nodeToDummyForVerticalAlignment.get(nodeId) ? nodeToDummyForVerticalAlignment.get(nodeId) : nodeId;
if (nodeToDummyForVerticalAlignment.get(adjacent.id)) {
targetNode = {id: nodeToDummyForVerticalAlignment.get(adjacent.id), gap: adjacent.gap, direction: adjacent.direction};
}
else {
targetNode = adjacent;
}
if (dagOnHorizontal.has(sourceId)) {
dagOnHorizontal.get(sourceId).push(targetNode);
}
else {
dagOnHorizontal.set(sourceId, [targetNode]);
}
if (!dagOnHorizontal.has(targetNode.id)) {
dagOnHorizontal.set(targetNode.id, []);
}
}
else {
sourceId = nodeToDummyForHorizontalAlignment.get(nodeId) ? nodeToDummyForHorizontalAlignment.get(nodeId) : nodeId;
if (nodeToDummyForHorizontalAlignment.get(adjacent.id)) {
targetNode = {id: nodeToDummyForHorizontalAlignment.get(adjacent.id), gap: adjacent.gap, direction: adjacent.direction};
}
else {
targetNode = adjacent;
}
if (dagOnVertical.has(sourceId)) {
dagOnVertical.get(sourceId).push(targetNode);
}
else {
dagOnVertical.set(sourceId, [targetNode]);
}
if (!dagOnVertical.has(targetNode.id)) {
dagOnVertical.set(targetNode.id, []);
}
}
});
}
// find source nodes of each component in horizontal and vertical dags
let undirectedOnHorizontal = dagToUndirected(dagOnHorizontal);
let undirectedOnVertical = dagToUndirected(dagOnVertical);
let componentsOnHorizontal = findComponents(undirectedOnHorizontal);
let componentsOnVertical = findComponents(undirectedOnVertical);
let reversedDagOnHorizontal = dagToReversed(dagOnHorizontal);
let reversedDagOnVertical = dagToReversed(dagOnVertical);
let componentSourcesOnHorizontal = [];
let componentSourcesOnVertical = [];
componentsOnHorizontal.forEach(function(component, index) {
componentSourcesOnHorizontal[index] = [];
component.forEach(function(nodeId) {
if (reversedDagOnHorizontal.get(nodeId).length == 0) {
componentSourcesOnHorizontal[index].push(nodeId);
}
});
});
componentsOnVertical.forEach(function(component, index) {
componentSourcesOnVertical[index] = [];
component.forEach(function(nodeId) {
if (reversedDagOnVertical.get(nodeId).length == 0) {
componentSourcesOnVertical[index].push(nodeId);
}
});
});
// calculate appropriate positioning for subgraphs
let positionMapHorizontal = findAppropriatePositionForRelativePlacement(dagOnHorizontal, "horizontal", fixedNodesOnHorizontal, dummyPositionsForVerticalAlignment, componentSourcesOnHorizontal);
let positionMapVertical = findAppropriatePositionForRelativePlacement(dagOnVertical, "vertical", fixedNodesOnVertical, dummyPositionsForHorizontalAlignment, componentSourcesOnVertical);
// update positions of the nodes based on relative placement constraints
for (let key of positionMapHorizontal.keys()) {
if (dummyToNodeForVerticalAlignment.get(key)) {
dummyToNodeForVerticalAlignment.get(key).forEach(function(nodeId) {
xCoords[nodeIndexes.get(nodeId)] = positionMapHorizontal.get(key);
});
}
else {
xCoords[nodeIndexes.get(key)] = positionMapHorizontal.get(key);
}
}
for (let key of positionMapVertical.keys()) {
if (dummyToNodeForHorizontalAlignment.get(key)) {
dummyToNodeForHorizontalAlignment.get(key).forEach(function(nodeId) {
yCoords[nodeIndexes.get(nodeId)] = positionMapVertical.get(key);
});
}
else {
yCoords[nodeIndexes.get(key)] = positionMapVertical.get(key);
}
}
}
}
// assign new coordinates to nodes after constraint handling
for (let i = 0; i < allNodes.length; i++) {
let node = allNodes[i];
if (node.getChild() == null) {
node.setCenter(xCoords[nodeIndexes.get(node.id)], yCoords[nodeIndexes.get(node.id)]);
}
}
};
module.exports = ConstraintHandler;

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layout-base
================================================================================
## Description
This repository implements a basic layout model and some utilities for Cytoscape.js layout extensions.
## Usage instructions
Add `layout-base` as a dependecy to your layout extension.
`require()` in the extension to reach functionality:
* `var Integer = require(layout-base).Integer`,
* `var Layout = require(layout-base).Layout`,
* `...`
For a usage example, see [cose-base](https://github.com/iVis-at-Bilkent/cose-base) or [avsdf-base](https://github.com/iVis-at-Bilkent/avsdf-base).
![](https://github.com/iVis-at-Bilkent/layout-base/blob/master/layout-schema.png)

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var LGraphObject = require('./LGraphObject');
var IGeometry = require('./util/IGeometry');
var IMath = require('./util/IMath');
function LEdge(source, target, vEdge) {
LGraphObject.call(this, vEdge);
this.isOverlapingSourceAndTarget = false;
this.vGraphObject = vEdge;
this.bendpoints = [];
this.source = source;
this.target = target;
}
LEdge.prototype = Object.create(LGraphObject.prototype);
for (var prop in LGraphObject) {
LEdge[prop] = LGraphObject[prop];
}
LEdge.prototype.getSource = function ()
{
return this.source;
};
LEdge.prototype.getTarget = function ()
{
return this.target;
};
LEdge.prototype.isInterGraph = function ()
{
return this.isInterGraph;
};
LEdge.prototype.getLength = function ()
{
return this.length;
};
LEdge.prototype.isOverlapingSourceAndTarget = function ()
{
return this.isOverlapingSourceAndTarget;
};
LEdge.prototype.getBendpoints = function ()
{
return this.bendpoints;
};
LEdge.prototype.getLca = function ()
{
return this.lca;
};
LEdge.prototype.getSourceInLca = function ()
{
return this.sourceInLca;
};
LEdge.prototype.getTargetInLca = function ()
{
return this.targetInLca;
};
LEdge.prototype.getOtherEnd = function (node)
{
if (this.source === node)
{
return this.target;
}
else if (this.target === node)
{
return this.source;
}
else
{
throw "Node is not incident with this edge";
}
}
LEdge.prototype.getOtherEndInGraph = function (node, graph)
{
var otherEnd = this.getOtherEnd(node);
var root = graph.getGraphManager().getRoot();
while (true)
{
if (otherEnd.getOwner() == graph)
{
return otherEnd;
}
if (otherEnd.getOwner() == root)
{
break;
}
otherEnd = otherEnd.getOwner().getParent();
}
return null;
};
LEdge.prototype.updateLength = function ()
{
var clipPointCoordinates = new Array(4);
this.isOverlapingSourceAndTarget =
IGeometry.getIntersection(this.target.getRect(),
this.source.getRect(),
clipPointCoordinates);
if (!this.isOverlapingSourceAndTarget)
{
this.lengthX = clipPointCoordinates[0] - clipPointCoordinates[2];
this.lengthY = clipPointCoordinates[1] - clipPointCoordinates[3];
if (Math.abs(this.lengthX) < 1.0)
{
this.lengthX = IMath.sign(this.lengthX);
}
if (Math.abs(this.lengthY) < 1.0)
{
this.lengthY = IMath.sign(this.lengthY);
}
this.length = Math.sqrt(
this.lengthX * this.lengthX + this.lengthY * this.lengthY);
}
};
LEdge.prototype.updateLengthSimple = function ()
{
this.lengthX = this.target.getCenterX() - this.source.getCenterX();
this.lengthY = this.target.getCenterY() - this.source.getCenterY();
if (Math.abs(this.lengthX) < 1.0)
{
this.lengthX = IMath.sign(this.lengthX);
}
if (Math.abs(this.lengthY) < 1.0)
{
this.lengthY = IMath.sign(this.lengthY);
}
this.length = Math.sqrt(
this.lengthX * this.lengthX + this.lengthY * this.lengthY);
}
module.exports = LEdge;

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var LayoutConstants = require('./LayoutConstants');
var LGraphManager = require('./LGraphManager');
var LNode = require('./LNode');
var LEdge = require('./LEdge');
var LGraph = require('./LGraph');
var PointD = require('./util/PointD');
var Transform = require('./util/Transform');
var Emitter = require('./util/Emitter');
function Layout(isRemoteUse) {
Emitter.call( this );
//Layout Quality: 0:draft, 1:default, 2:proof
this.layoutQuality = LayoutConstants.QUALITY;
//Whether layout should create bendpoints as needed or not
this.createBendsAsNeeded =
LayoutConstants.DEFAULT_CREATE_BENDS_AS_NEEDED;
//Whether layout should be incremental or not
this.incremental = LayoutConstants.DEFAULT_INCREMENTAL;
//Whether we animate from before to after layout node positions
this.animationOnLayout =
LayoutConstants.DEFAULT_ANIMATION_ON_LAYOUT;
//Whether we animate the layout process or not
this.animationDuringLayout = LayoutConstants.DEFAULT_ANIMATION_DURING_LAYOUT;
//Number iterations that should be done between two successive animations
this.animationPeriod = LayoutConstants.DEFAULT_ANIMATION_PERIOD;
/**
* Whether or not leaf nodes (non-compound nodes) are of uniform sizes. When
* they are, both spring and repulsion forces between two leaf nodes can be
* calculated without the expensive clipping point calculations, resulting
* in major speed-up.
*/
this.uniformLeafNodeSizes =
LayoutConstants.DEFAULT_UNIFORM_LEAF_NODE_SIZES;
/**
* This is used for creation of bendpoints by using dummy nodes and edges.
* Maps an LEdge to its dummy bendpoint path.
*/
this.edgeToDummyNodes = new Map();
this.graphManager = new LGraphManager(this);
this.isLayoutFinished = false;
this.isSubLayout = false;
this.isRemoteUse = false;
if (isRemoteUse != null) {
this.isRemoteUse = isRemoteUse;
}
}
Layout.RANDOM_SEED = 1;
Layout.prototype = Object.create( Emitter.prototype );
Layout.prototype.getGraphManager = function () {
return this.graphManager;
};
Layout.prototype.getAllNodes = function () {
return this.graphManager.getAllNodes();
};
Layout.prototype.getAllEdges = function () {
return this.graphManager.getAllEdges();
};
Layout.prototype.getAllNodesToApplyGravitation = function () {
return this.graphManager.getAllNodesToApplyGravitation();
};
Layout.prototype.newGraphManager = function () {
var gm = new LGraphManager(this);
this.graphManager = gm;
return gm;
};
Layout.prototype.newGraph = function (vGraph)
{
return new LGraph(null, this.graphManager, vGraph);
};
Layout.prototype.newNode = function (vNode)
{
return new LNode(this.graphManager, vNode);
};
Layout.prototype.newEdge = function (vEdge)
{
return new LEdge(null, null, vEdge);
};
Layout.prototype.checkLayoutSuccess = function() {
return (this.graphManager.getRoot() == null)
|| this.graphManager.getRoot().getNodes().length == 0
|| this.graphManager.includesInvalidEdge();
};
Layout.prototype.runLayout = function ()
{
this.isLayoutFinished = false;
if (this.tilingPreLayout) {
this.tilingPreLayout();
}
this.initParameters();
var isLayoutSuccessfull;
if (this.checkLayoutSuccess())
{
isLayoutSuccessfull = false;
}
else
{
isLayoutSuccessfull = this.layout();
}
if (LayoutConstants.ANIMATE === 'during') {
// If this is a 'during' layout animation. Layout is not finished yet.
// We need to perform these in index.js when layout is really finished.
return false;
}
if (isLayoutSuccessfull)
{
if (!this.isSubLayout)
{
this.doPostLayout();
}
}
if (this.tilingPostLayout) {
this.tilingPostLayout();
}
this.isLayoutFinished = true;
return isLayoutSuccessfull;
};
/**
* This method performs the operations required after layout.
*/
Layout.prototype.doPostLayout = function ()
{
//assert !isSubLayout : "Should not be called on sub-layout!";
// Propagate geometric changes to v-level objects
if(!this.incremental){
this.transform();
}
this.update();
};
/**
* This method updates the geometry of the target graph according to
* calculated layout.
*/
Layout.prototype.update2 = function () {
// update bend points
if (this.createBendsAsNeeded)
{
this.createBendpointsFromDummyNodes();
// reset all edges, since the topology has changed
this.graphManager.resetAllEdges();
}
// perform edge, node and root updates if layout is not called
// remotely
if (!this.isRemoteUse)
{
// update all edges
var edge;
var allEdges = this.graphManager.getAllEdges();
for (var i = 0; i < allEdges.length; i++)
{
edge = allEdges[i];
// this.update(edge);
}
// recursively update nodes
var node;
var nodes = this.graphManager.getRoot().getNodes();
for (var i = 0; i < nodes.length; i++)
{
node = nodes[i];
// this.update(node);
}
// update root graph
this.update(this.graphManager.getRoot());
}
};
Layout.prototype.update = function (obj) {
if (obj == null) {
this.update2();
}
else if (obj instanceof LNode) {
var node = obj;
if (node.getChild() != null)
{
// since node is compound, recursively update child nodes
var nodes = node.getChild().getNodes();
for (var i = 0; i < nodes.length; i++)
{
update(nodes[i]);
}
}
// if the l-level node is associated with a v-level graph object,
// then it is assumed that the v-level node implements the
// interface Updatable.
if (node.vGraphObject != null)
{
// cast to Updatable without any type check
var vNode = node.vGraphObject;
// call the update method of the interface
vNode.update(node);
}
}
else if (obj instanceof LEdge) {
var edge = obj;
// if the l-level edge is associated with a v-level graph object,
// then it is assumed that the v-level edge implements the
// interface Updatable.
if (edge.vGraphObject != null)
{
// cast to Updatable without any type check
var vEdge = edge.vGraphObject;
// call the update method of the interface
vEdge.update(edge);
}
}
else if (obj instanceof LGraph) {
var graph = obj;
// if the l-level graph is associated with a v-level graph object,
// then it is assumed that the v-level object implements the
// interface Updatable.
if (graph.vGraphObject != null)
{
// cast to Updatable without any type check
var vGraph = graph.vGraphObject;
// call the update method of the interface
vGraph.update(graph);
}
}
};
/**
* This method is used to set all layout parameters to default values
* determined at compile time.
*/
Layout.prototype.initParameters = function () {
if (!this.isSubLayout)
{
this.layoutQuality = LayoutConstants.QUALITY;
this.animationDuringLayout = LayoutConstants.DEFAULT_ANIMATION_DURING_LAYOUT;
this.animationPeriod = LayoutConstants.DEFAULT_ANIMATION_PERIOD;
this.animationOnLayout = LayoutConstants.DEFAULT_ANIMATION_ON_LAYOUT;
this.incremental = LayoutConstants.DEFAULT_INCREMENTAL;
this.createBendsAsNeeded = LayoutConstants.DEFAULT_CREATE_BENDS_AS_NEEDED;
this.uniformLeafNodeSizes = LayoutConstants.DEFAULT_UNIFORM_LEAF_NODE_SIZES;
}
if (this.animationDuringLayout)
{
this.animationOnLayout = false;
}
};
Layout.prototype.transform = function (newLeftTop) {
if (newLeftTop == undefined) {
this.transform(new PointD(0, 0));
}
else {
// create a transformation object (from Eclipse to layout). When an
// inverse transform is applied, we get upper-left coordinate of the
// drawing or the root graph at given input coordinate (some margins
// already included in calculation of left-top).
var trans = new Transform();
var leftTop = this.graphManager.getRoot().updateLeftTop();
if (leftTop != null)
{
trans.setWorldOrgX(newLeftTop.x);
trans.setWorldOrgY(newLeftTop.y);
trans.setDeviceOrgX(leftTop.x);
trans.setDeviceOrgY(leftTop.y);
var nodes = this.getAllNodes();
var node;
for (var i = 0; i < nodes.length; i++)
{
node = nodes[i];
node.transform(trans);
}
}
}
};
Layout.prototype.positionNodesRandomly = function (graph) {
if (graph == undefined) {
//assert !this.incremental;
this.positionNodesRandomly(this.getGraphManager().getRoot());
this.getGraphManager().getRoot().updateBounds(true);
}
else {
var lNode;
var childGraph;
var nodes = graph.getNodes();
for (var i = 0; i < nodes.length; i++)
{
lNode = nodes[i];
childGraph = lNode.getChild();
if (childGraph == null)
{
lNode.scatter();
}
else if (childGraph.getNodes().length == 0)
{
lNode.scatter();
}
else
{
this.positionNodesRandomly(childGraph);
lNode.updateBounds();
}
}
}
};
/**
* This method returns a list of trees where each tree is represented as a
* list of l-nodes. The method returns a list of size 0 when:
* - The graph is not flat or
* - One of the component(s) of the graph is not a tree.
*/
Layout.prototype.getFlatForest = function ()
{
var flatForest = [];
var isForest = true;
// Quick reference for all nodes in the graph manager associated with
// this layout. The list should not be changed.
var allNodes = this.graphManager.getRoot().getNodes();
// First be sure that the graph is flat
var isFlat = true;
for (var i = 0; i < allNodes.length; i++)
{
if (allNodes[i].getChild() != null)
{
isFlat = false;
}
}
// Return empty forest if the graph is not flat.
if (!isFlat)
{
return flatForest;
}
// Run BFS for each component of the graph.
var visited = new Set();
var toBeVisited = [];
var parents = new Map();
var unProcessedNodes = [];
unProcessedNodes = unProcessedNodes.concat(allNodes);
// Each iteration of this loop finds a component of the graph and
// decides whether it is a tree or not. If it is a tree, adds it to the
// forest and continued with the next component.
while (unProcessedNodes.length > 0 && isForest)
{
toBeVisited.push(unProcessedNodes[0]);
// Start the BFS. Each iteration of this loop visits a node in a
// BFS manner.
while (toBeVisited.length > 0 && isForest)
{
//pool operation
var currentNode = toBeVisited[0];
toBeVisited.splice(0, 1);
visited.add(currentNode);
// Traverse all neighbors of this node
var neighborEdges = currentNode.getEdges();
for (var i = 0; i < neighborEdges.length; i++)
{
var currentNeighbor =
neighborEdges[i].getOtherEnd(currentNode);
// If BFS is not growing from this neighbor.
if (parents.get(currentNode) != currentNeighbor)
{
// We haven't previously visited this neighbor.
if (!visited.has(currentNeighbor))
{
toBeVisited.push(currentNeighbor);
parents.set(currentNeighbor, currentNode);
}
// Since we have previously visited this neighbor and
// this neighbor is not parent of currentNode, given
// graph contains a component that is not tree, hence
// it is not a forest.
else
{
isForest = false;
break;
}
}
}
}
// The graph contains a component that is not a tree. Empty
// previously found trees. The method will end.
if (!isForest)
{
flatForest = [];
}
// Save currently visited nodes as a tree in our forest. Reset
// visited and parents lists. Continue with the next component of
// the graph, if any.
else
{
var temp = [...visited];
flatForest.push(temp);
//flatForest = flatForest.concat(temp);
//unProcessedNodes.removeAll(visited);
for (var i = 0; i < temp.length; i++) {
var value = temp[i];
var index = unProcessedNodes.indexOf(value);
if (index > -1) {
unProcessedNodes.splice(index, 1);
}
}
visited = new Set();
parents = new Map();
}
}
return flatForest;
};
/**
* This method creates dummy nodes (an l-level node with minimal dimensions)
* for the given edge (one per bendpoint). The existing l-level structure
* is updated accordingly.
*/
Layout.prototype.createDummyNodesForBendpoints = function (edge)
{
var dummyNodes = [];
var prev = edge.source;
var graph = this.graphManager.calcLowestCommonAncestor(edge.source, edge.target);
for (var i = 0; i < edge.bendpoints.length; i++)
{
// create new dummy node
var dummyNode = this.newNode(null);
dummyNode.setRect(new Point(0, 0), new Dimension(1, 1));
graph.add(dummyNode);
// create new dummy edge between prev and dummy node
var dummyEdge = this.newEdge(null);
this.graphManager.add(dummyEdge, prev, dummyNode);
dummyNodes.add(dummyNode);
prev = dummyNode;
}
var dummyEdge = this.newEdge(null);
this.graphManager.add(dummyEdge, prev, edge.target);
this.edgeToDummyNodes.set(edge, dummyNodes);
// remove real edge from graph manager if it is inter-graph
if (edge.isInterGraph())
{
this.graphManager.remove(edge);
}
// else, remove the edge from the current graph
else
{
graph.remove(edge);
}
return dummyNodes;
};
/**
* This method creates bendpoints for edges from the dummy nodes
* at l-level.
*/
Layout.prototype.createBendpointsFromDummyNodes = function ()
{
var edges = [];
edges = edges.concat(this.graphManager.getAllEdges());
edges = [...this.edgeToDummyNodes.keys()].concat(edges);
for (var k = 0; k < edges.length; k++)
{
var lEdge = edges[k];
if (lEdge.bendpoints.length > 0)
{
var path = this.edgeToDummyNodes.get(lEdge);
for (var i = 0; i < path.length; i++)
{
var dummyNode = path[i];
var p = new PointD(dummyNode.getCenterX(),
dummyNode.getCenterY());
// update bendpoint's location according to dummy node
var ebp = lEdge.bendpoints.get(i);
ebp.x = p.x;
ebp.y = p.y;
// remove the dummy node, dummy edges incident with this
// dummy node is also removed (within the remove method)
dummyNode.getOwner().remove(dummyNode);
}
// add the real edge to graph
this.graphManager.add(lEdge, lEdge.source, lEdge.target);
}
}
};
Layout.transform = function (sliderValue, defaultValue, minDiv, maxMul) {
if (minDiv != undefined && maxMul != undefined) {
var value = defaultValue;
if (sliderValue <= 50)
{
var minValue = defaultValue / minDiv;
value -= ((defaultValue - minValue) / 50) * (50 - sliderValue);
}
else
{
var maxValue = defaultValue * maxMul;
value += ((maxValue - defaultValue) / 50) * (sliderValue - 50);
}
return value;
}
else {
var a, b;
if (sliderValue <= 50)
{
a = 9.0 * defaultValue / 500.0;
b = defaultValue / 10.0;
}
else
{
a = 9.0 * defaultValue / 50.0;
b = -8 * defaultValue;
}
return (a * sliderValue + b);
}
};
/**
* This method finds and returns the center of the given nodes, assuming
* that the given nodes form a tree in themselves.
*/
Layout.findCenterOfTree = function (nodes)
{
var list = [];
list = list.concat(nodes);
var removedNodes = [];
var remainingDegrees = new Map();
var foundCenter = false;
var centerNode = null;
if (list.length == 1 || list.length == 2)
{
foundCenter = true;
centerNode = list[0];
}
for (var i = 0; i < list.length; i++)
{
var node = list[i];
var degree = node.getNeighborsList().size;
remainingDegrees.set(node, node.getNeighborsList().size);
if (degree == 1)
{
removedNodes.push(node);
}
}
var tempList = [];
tempList = tempList.concat(removedNodes);
while (!foundCenter)
{
var tempList2 = [];
tempList2 = tempList2.concat(tempList);
tempList = [];
for (var i = 0; i < list.length; i++)
{
var node = list[i];
var index = list.indexOf(node);
if (index >= 0) {
list.splice(index, 1);
}
var neighbours = node.getNeighborsList();
neighbours.forEach(function(neighbour) {
if (removedNodes.indexOf(neighbour) < 0)
{
var otherDegree = remainingDegrees.get(neighbour);
var newDegree = otherDegree - 1;
if (newDegree == 1)
{
tempList.push(neighbour);
}
remainingDegrees.set(neighbour, newDegree);
}
});
}
removedNodes = removedNodes.concat(tempList);
if (list.length == 1 || list.length == 2)
{
foundCenter = true;
centerNode = list[0];
}
}
return centerNode;
};
/**
* During the coarsening process, this layout may be referenced by two graph managers
* this setter function grants access to change the currently being used graph manager
*/
Layout.prototype.setGraphManager = function (gm)
{
this.graphManager = gm;
};
module.exports = Layout;

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var Layout = require('../Layout');
var FDLayoutConstants = require('./FDLayoutConstants');
var LayoutConstants = require('../LayoutConstants');
var IGeometry = require('../util/IGeometry');
var IMath = require('../util/IMath');
function FDLayout() {
Layout.call(this);
this.useSmartIdealEdgeLengthCalculation = FDLayoutConstants.DEFAULT_USE_SMART_IDEAL_EDGE_LENGTH_CALCULATION;
this.gravityConstant = FDLayoutConstants.DEFAULT_GRAVITY_STRENGTH;
this.compoundGravityConstant = FDLayoutConstants.DEFAULT_COMPOUND_GRAVITY_STRENGTH;
this.gravityRangeFactor = FDLayoutConstants.DEFAULT_GRAVITY_RANGE_FACTOR;
this.compoundGravityRangeFactor = FDLayoutConstants.DEFAULT_COMPOUND_GRAVITY_RANGE_FACTOR;
this.displacementThresholdPerNode = (3.0 * FDLayoutConstants.DEFAULT_EDGE_LENGTH) / 100;
this.coolingFactor = FDLayoutConstants.DEFAULT_COOLING_FACTOR_INCREMENTAL;
this.initialCoolingFactor = FDLayoutConstants.DEFAULT_COOLING_FACTOR_INCREMENTAL;
this.totalDisplacement = 0.0;
this.oldTotalDisplacement = 0.0;
this.maxIterations = FDLayoutConstants.MAX_ITERATIONS;
}
FDLayout.prototype = Object.create(Layout.prototype);
for (var prop in Layout) {
FDLayout[prop] = Layout[prop];
}
FDLayout.prototype.initParameters = function () {
Layout.prototype.initParameters.call(this, arguments);
this.totalIterations = 0;
this.notAnimatedIterations = 0;
this.useFRGridVariant = FDLayoutConstants.DEFAULT_USE_SMART_REPULSION_RANGE_CALCULATION;
this.grid = [];
};
FDLayout.prototype.calcIdealEdgeLengths = function () {
var edge;
var originalIdealLength;
var lcaDepth;
var source;
var target;
var sizeOfSourceInLca;
var sizeOfTargetInLca;
var allEdges = this.getGraphManager().getAllEdges();
for (var i = 0; i < allEdges.length; i++)
{
edge = allEdges[i];
originalIdealLength = edge.idealLength;
if (edge.isInterGraph)
{
source = edge.getSource();
target = edge.getTarget();
sizeOfSourceInLca = edge.getSourceInLca().getEstimatedSize();
sizeOfTargetInLca = edge.getTargetInLca().getEstimatedSize();
if (this.useSmartIdealEdgeLengthCalculation)
{
edge.idealLength += sizeOfSourceInLca + sizeOfTargetInLca -
2 * LayoutConstants.SIMPLE_NODE_SIZE;
}
lcaDepth = edge.getLca().getInclusionTreeDepth();
edge.idealLength += originalIdealLength *
FDLayoutConstants.PER_LEVEL_IDEAL_EDGE_LENGTH_FACTOR *
(source.getInclusionTreeDepth() +
target.getInclusionTreeDepth() - 2 * lcaDepth);
}
}
};
FDLayout.prototype.initSpringEmbedder = function () {
var s = this.getAllNodes().length;
if (this.incremental) {
if(s > FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT){
this.coolingFactor = Math.max(this.coolingFactor*FDLayoutConstants.COOLING_ADAPTATION_FACTOR, this.coolingFactor -
(s-FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT)/(FDLayoutConstants.ADAPTATION_UPPER_NODE_LIMIT-FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT)*this.coolingFactor*(1-FDLayoutConstants.COOLING_ADAPTATION_FACTOR));
}
this.maxNodeDisplacement = FDLayoutConstants.MAX_NODE_DISPLACEMENT_INCREMENTAL;
}
else {
if(s > FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT){
this.coolingFactor = Math.max(FDLayoutConstants.COOLING_ADAPTATION_FACTOR, 1.0 -
(s-FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT)/(FDLayoutConstants.ADAPTATION_UPPER_NODE_LIMIT-FDLayoutConstants.ADAPTATION_LOWER_NODE_LIMIT)*(1-FDLayoutConstants.COOLING_ADAPTATION_FACTOR));
}
else {
this.coolingFactor = 1.0;
}
this.initialCoolingFactor = this.coolingFactor;
this.maxNodeDisplacement = FDLayoutConstants.MAX_NODE_DISPLACEMENT;
}
this.maxIterations =
Math.max(this.getAllNodes().length * 5, this.maxIterations);
// Reassign this attribute by using new constant value
this.displacementThresholdPerNode = (3.0 * FDLayoutConstants.DEFAULT_EDGE_LENGTH) / 100;
this.totalDisplacementThreshold = this.displacementThresholdPerNode * this.getAllNodes().length;
this.repulsionRange = this.calcRepulsionRange();
};
FDLayout.prototype.calcSpringForces = function () {
var lEdges = this.getAllEdges();
var edge;
for (var i = 0; i < lEdges.length; i++)
{
edge = lEdges[i];
this.calcSpringForce(edge, edge.idealLength);
}
};
FDLayout.prototype.calcRepulsionForces = function (gridUpdateAllowed = true, forceToNodeSurroundingUpdate = false) {
var i, j;
var nodeA, nodeB;
var lNodes = this.getAllNodes();
var processedNodeSet;
if (this.useFRGridVariant)
{
if ((this.totalIterations % FDLayoutConstants.GRID_CALCULATION_CHECK_PERIOD == 1 && gridUpdateAllowed))
{
this.updateGrid();
}
processedNodeSet = new Set();
// calculate repulsion forces between each nodes and its surrounding
for (i = 0; i < lNodes.length; i++)
{
nodeA = lNodes[i];
this.calculateRepulsionForceOfANode(nodeA, processedNodeSet, gridUpdateAllowed, forceToNodeSurroundingUpdate);
processedNodeSet.add(nodeA);
}
}
else
{
for (i = 0; i < lNodes.length; i++)
{
nodeA = lNodes[i];
for (j = i + 1; j < lNodes.length; j++)
{
nodeB = lNodes[j];
// If both nodes are not members of the same graph, skip.
if (nodeA.getOwner() != nodeB.getOwner())
{
continue;
}
this.calcRepulsionForce(nodeA, nodeB);
}
}
}
};
FDLayout.prototype.calcGravitationalForces = function () {
var node;
var lNodes = this.getAllNodesToApplyGravitation();
for (var i = 0; i < lNodes.length; i++)
{
node = lNodes[i];
this.calcGravitationalForce(node);
}
};
FDLayout.prototype.moveNodes = function () {
var lNodes = this.getAllNodes();
var node;
for (var i = 0; i < lNodes.length; i++)
{
node = lNodes[i];
node.move();
}
}
FDLayout.prototype.calcSpringForce = function (edge, idealLength) {
var sourceNode = edge.getSource();
var targetNode = edge.getTarget();
var length;
var springForce;
var springForceX;
var springForceY;
// Update edge length
if (this.uniformLeafNodeSizes &&
sourceNode.getChild() == null && targetNode.getChild() == null)
{
edge.updateLengthSimple();
}
else
{
edge.updateLength();
if (edge.isOverlapingSourceAndTarget)
{
return;
}
}
length = edge.getLength();
if(length == 0)
return;
// Calculate spring forces
springForce = edge.edgeElasticity * (length - idealLength);
// Project force onto x and y axes
springForceX = springForce * (edge.lengthX / length);
springForceY = springForce * (edge.lengthY / length);
// Apply forces on the end nodes
sourceNode.springForceX += springForceX;
sourceNode.springForceY += springForceY;
targetNode.springForceX -= springForceX;
targetNode.springForceY -= springForceY;
};
FDLayout.prototype.calcRepulsionForce = function (nodeA, nodeB) {
var rectA = nodeA.getRect();
var rectB = nodeB.getRect();
var overlapAmount = new Array(2);
var clipPoints = new Array(4);
var distanceX;
var distanceY;
var distanceSquared;
var distance;
var repulsionForce;
var repulsionForceX;
var repulsionForceY;
if (rectA.intersects(rectB))// two nodes overlap
{
// calculate separation amount in x and y directions
IGeometry.calcSeparationAmount(rectA,
rectB,
overlapAmount,
FDLayoutConstants.DEFAULT_EDGE_LENGTH / 2.0);
repulsionForceX = 2 * overlapAmount[0];
repulsionForceY = 2 * overlapAmount[1];
var childrenConstant = nodeA.noOfChildren * nodeB.noOfChildren / (nodeA.noOfChildren + nodeB.noOfChildren);
// Apply forces on the two nodes
nodeA.repulsionForceX -= childrenConstant * repulsionForceX;
nodeA.repulsionForceY -= childrenConstant * repulsionForceY;
nodeB.repulsionForceX += childrenConstant * repulsionForceX;
nodeB.repulsionForceY += childrenConstant * repulsionForceY;
}
else// no overlap
{
// calculate distance
if (this.uniformLeafNodeSizes &&
nodeA.getChild() == null && nodeB.getChild() == null)// simply base repulsion on distance of node centers
{
distanceX = rectB.getCenterX() - rectA.getCenterX();
distanceY = rectB.getCenterY() - rectA.getCenterY();
}
else// use clipping points
{
IGeometry.getIntersection(rectA, rectB, clipPoints);
distanceX = clipPoints[2] - clipPoints[0];
distanceY = clipPoints[3] - clipPoints[1];
}
// No repulsion range. FR grid variant should take care of this.
if (Math.abs(distanceX) < FDLayoutConstants.MIN_REPULSION_DIST)
{
distanceX = IMath.sign(distanceX) *
FDLayoutConstants.MIN_REPULSION_DIST;
}
if (Math.abs(distanceY) < FDLayoutConstants.MIN_REPULSION_DIST)
{
distanceY = IMath.sign(distanceY) *
FDLayoutConstants.MIN_REPULSION_DIST;
}
distanceSquared = distanceX * distanceX + distanceY * distanceY;
distance = Math.sqrt(distanceSquared);
// Here we use half of the nodes' repulsion values for backward compatibility
repulsionForce = (nodeA.nodeRepulsion / 2 + nodeB.nodeRepulsion / 2) * nodeA.noOfChildren * nodeB.noOfChildren / distanceSquared;
// Project force onto x and y axes
repulsionForceX = repulsionForce * distanceX / distance;
repulsionForceY = repulsionForce * distanceY / distance;
// Apply forces on the two nodes
nodeA.repulsionForceX -= repulsionForceX;
nodeA.repulsionForceY -= repulsionForceY;
nodeB.repulsionForceX += repulsionForceX;
nodeB.repulsionForceY += repulsionForceY;
}
};
FDLayout.prototype.calcGravitationalForce = function (node) {
var ownerGraph;
var ownerCenterX;
var ownerCenterY;
var distanceX;
var distanceY;
var absDistanceX;
var absDistanceY;
var estimatedSize;
ownerGraph = node.getOwner();
ownerCenterX = (ownerGraph.getRight() + ownerGraph.getLeft()) / 2;
ownerCenterY = (ownerGraph.getTop() + ownerGraph.getBottom()) / 2;
distanceX = node.getCenterX() - ownerCenterX;
distanceY = node.getCenterY() - ownerCenterY;
absDistanceX = Math.abs(distanceX) + node.getWidth() / 2;
absDistanceY = Math.abs(distanceY) + node.getHeight() / 2;
if (node.getOwner() == this.graphManager.getRoot())// in the root graph
{
estimatedSize = ownerGraph.getEstimatedSize() * this.gravityRangeFactor;
if (absDistanceX > estimatedSize || absDistanceY > estimatedSize)
{
node.gravitationForceX = -this.gravityConstant * distanceX;
node.gravitationForceY = -this.gravityConstant * distanceY;
}
}
else// inside a compound
{
estimatedSize = ownerGraph.getEstimatedSize() * this.compoundGravityRangeFactor;
if (absDistanceX > estimatedSize || absDistanceY > estimatedSize)
{
node.gravitationForceX = -this.gravityConstant * distanceX *
this.compoundGravityConstant;
node.gravitationForceY = -this.gravityConstant * distanceY *
this.compoundGravityConstant;
}
}
};
FDLayout.prototype.isConverged = function () {
var converged;
var oscilating = false;
if (this.totalIterations > this.maxIterations / 3)
{
oscilating =
Math.abs(this.totalDisplacement - this.oldTotalDisplacement) < 2;
}
converged = this.totalDisplacement < this.totalDisplacementThreshold;
this.oldTotalDisplacement = this.totalDisplacement;
return converged || oscilating;
};
FDLayout.prototype.animate = function () {
if (this.animationDuringLayout && !this.isSubLayout)
{
if (this.notAnimatedIterations == this.animationPeriod)
{
this.update();
this.notAnimatedIterations = 0;
}
else
{
this.notAnimatedIterations++;
}
}
};
//This method calculates the number of children (weight) for all nodes
FDLayout.prototype.calcNoOfChildrenForAllNodes = function ()
{
var node;
var allNodes = this.graphManager.getAllNodes();
for(var i = 0; i < allNodes.length; i++)
{
node = allNodes[i];
node.noOfChildren = node.getNoOfChildren();
}
};
// -----------------------------------------------------------------------------
// Section: FR-Grid Variant Repulsion Force Calculation
// -----------------------------------------------------------------------------
FDLayout.prototype.calcGrid = function (graph){
var sizeX = 0;
var sizeY = 0;
sizeX = parseInt(Math.ceil((graph.getRight() - graph.getLeft()) / this.repulsionRange));
sizeY = parseInt(Math.ceil((graph.getBottom() - graph.getTop()) / this.repulsionRange));
var grid = new Array(sizeX);
for(var i = 0; i < sizeX; i++){
grid[i] = new Array(sizeY);
}
for(var i = 0; i < sizeX; i++){
for(var j = 0; j < sizeY; j++){
grid[i][j] = new Array();
}
}
return grid;
};
FDLayout.prototype.addNodeToGrid = function (v, left, top){
var startX = 0;
var finishX = 0;
var startY = 0;
var finishY = 0;
startX = parseInt(Math.floor((v.getRect().x - left) / this.repulsionRange));
finishX = parseInt(Math.floor((v.getRect().width + v.getRect().x - left) / this.repulsionRange));
startY = parseInt(Math.floor((v.getRect().y - top) / this.repulsionRange));
finishY = parseInt(Math.floor((v.getRect().height + v.getRect().y - top) / this.repulsionRange));
for (var i = startX; i <= finishX; i++)
{
for (var j = startY; j <= finishY; j++)
{
this.grid[i][j].push(v);
v.setGridCoordinates(startX, finishX, startY, finishY);
}
}
};
FDLayout.prototype.updateGrid = function() {
var i;
var nodeA;
var lNodes = this.getAllNodes();
this.grid = this.calcGrid(this.graphManager.getRoot());
// put all nodes to proper grid cells
for (i = 0; i < lNodes.length; i++)
{
nodeA = lNodes[i];
this.addNodeToGrid(nodeA, this.graphManager.getRoot().getLeft(), this.graphManager.getRoot().getTop());
}
};
FDLayout.prototype.calculateRepulsionForceOfANode = function (nodeA, processedNodeSet, gridUpdateAllowed, forceToNodeSurroundingUpdate){
if ((this.totalIterations % FDLayoutConstants.GRID_CALCULATION_CHECK_PERIOD == 1 && gridUpdateAllowed) || forceToNodeSurroundingUpdate)
{
var surrounding = new Set();
nodeA.surrounding = new Array();
var nodeB;
var grid = this.grid;
for (var i = (nodeA.startX - 1); i < (nodeA.finishX + 2); i++)
{
for (var j = (nodeA.startY - 1); j < (nodeA.finishY + 2); j++)
{
if (!((i < 0) || (j < 0) || (i >= grid.length) || (j >= grid[0].length)))
{
for (var k = 0; k < grid[i][j].length; k++) {
nodeB = grid[i][j][k];
// If both nodes are not members of the same graph,
// or both nodes are the same, skip.
if ((nodeA.getOwner() != nodeB.getOwner()) || (nodeA == nodeB))
{
continue;
}
// check if the repulsion force between
// nodeA and nodeB has already been calculated
if (!processedNodeSet.has(nodeB) && !surrounding.has(nodeB))
{
var distanceX = Math.abs(nodeA.getCenterX()-nodeB.getCenterX()) -
((nodeA.getWidth()/2) + (nodeB.getWidth()/2));
var distanceY = Math.abs(nodeA.getCenterY()-nodeB.getCenterY()) -
((nodeA.getHeight()/2) + (nodeB.getHeight()/2));
// if the distance between nodeA and nodeB
// is less then calculation range
if ((distanceX <= this.repulsionRange) && (distanceY <= this.repulsionRange))
{
//then add nodeB to surrounding of nodeA
surrounding.add(nodeB);
}
}
}
}
}
}
nodeA.surrounding = [...surrounding];
}
for (i = 0; i < nodeA.surrounding.length; i++)
{
this.calcRepulsionForce(nodeA, nodeA.surrounding[i]);
}
};
FDLayout.prototype.calcRepulsionRange = function () {
return 0.0;
};
module.exports = FDLayout;

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var LNode = require('../LNode');
var FDLayoutConstants = require('./FDLayoutConstants');
function FDLayoutNode(gm, loc, size, vNode) {
// alternative constructor is handled inside LNode
LNode.call(this, gm, loc, size, vNode);
// Repulsion value of this node
this.nodeRepulsion = FDLayoutConstants.DEFAULT_REPULSION_STRENGTH;
//Spring, repulsion and gravitational forces acting on this node
this.springForceX = 0;
this.springForceY = 0;
this.repulsionForceX = 0;
this.repulsionForceY = 0;
this.gravitationForceX = 0;
this.gravitationForceY = 0;
//Amount by which this node is to be moved in this iteration
this.displacementX = 0;
this.displacementY = 0;
//Start and finish grid coordinates that this node is fallen into
this.startX = 0;
this.finishX = 0;
this.startY = 0;
this.finishY = 0;
//Geometric neighbors of this node
this.surrounding = [];
}
FDLayoutNode.prototype = Object.create(LNode.prototype);
for (var prop in LNode) {
FDLayoutNode[prop] = LNode[prop];
}
FDLayoutNode.prototype.setGridCoordinates = function (_startX, _finishX, _startY, _finishY)
{
this.startX = _startX;
this.finishX = _finishX;
this.startY = _startY;
this.finishY = _finishY;
};
module.exports = FDLayoutNode;

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function Emitter(){
this.listeners = [];
}
var p = Emitter.prototype;
p.addListener = function( event, callback ){
this.listeners.push({
event: event,
callback: callback
});
};
p.removeListener = function( event, callback ){
for( var i = this.listeners.length; i >= 0; i-- ){
var l = this.listeners[i];
if( l.event === event && l.callback === callback ){
this.listeners.splice( i, 1 );
}
}
};
p.emit = function( event, data ){
for( var i = 0; i < this.listeners.length; i++ ){
var l = this.listeners[i];
if( event === l.event ){
l.callback( data );
}
}
};
module.exports = Emitter;

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var UniqueIDGeneretor = require('./UniqueIDGeneretor');
function HashMap() {
this.map = {};
this.keys = [];
}
HashMap.prototype.put = function (key, value) {
var theId = UniqueIDGeneretor.createID(key);
if (!this.contains(theId)) {
this.map[theId] = value;
this.keys.push(key);
}
};
HashMap.prototype.contains = function (key) {
var theId = UniqueIDGeneretor.createID(key);
return this.map[key] != null;
};
HashMap.prototype.get = function (key) {
var theId = UniqueIDGeneretor.createID(key);
return this.map[theId];
};
HashMap.prototype.keySet = function () {
return this.keys;
};
module.exports = HashMap;

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var UniqueIDGeneretor = require('./UniqueIDGeneretor');
function HashSet() {
this.set = {};
}
;
HashSet.prototype.add = function (obj) {
var theId = UniqueIDGeneretor.createID(obj);
if (!this.contains(theId))
this.set[theId] = obj;
};
HashSet.prototype.remove = function (obj) {
delete this.set[UniqueIDGeneretor.createID(obj)];
};
HashSet.prototype.clear = function () {
this.set = {};
};
HashSet.prototype.contains = function (obj) {
return this.set[UniqueIDGeneretor.createID(obj)] == obj;
};
HashSet.prototype.isEmpty = function () {
return this.size() === 0;
};
HashSet.prototype.size = function () {
return Object.keys(this.set).length;
};
//concats this.set to the given list
HashSet.prototype.addAllTo = function (list) {
var keys = Object.keys(this.set);
var length = keys.length;
for (var i = 0; i < length; i++) {
list.push(this.set[keys[i]]);
}
};
HashSet.prototype.size = function () {
return Object.keys(this.set).length;
};
HashSet.prototype.addAll = function (list) {
var s = list.length;
for (var i = 0; i < s; i++) {
var v = list[i];
this.add(v);
}
};
module.exports = HashSet;

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/**
* This class maintains a list of static geometry related utility methods.
*
*
* Copyright: i-Vis Research Group, Bilkent University, 2007 - present
*/
const Point = require('./Point');
function IGeometry() {
}
/**
* This method calculates *half* the amount in x and y directions of the two
* input rectangles needed to separate them keeping their respective
* positioning, and returns the result in the input array. An input
* separation buffer added to the amount in both directions. We assume that
* the two rectangles do intersect.
*/
IGeometry.calcSeparationAmount = function (rectA, rectB, overlapAmount, separationBuffer)
{
if (!rectA.intersects(rectB)) {
throw "assert failed";
}
let directions = new Array(2);
this.decideDirectionsForOverlappingNodes(rectA, rectB, directions);
overlapAmount[0] = Math.min(rectA.getRight(), rectB.getRight()) -
Math.max(rectA.x, rectB.x);
overlapAmount[1] = Math.min(rectA.getBottom(), rectB.getBottom()) -
Math.max(rectA.y, rectB.y);
// update the overlapping amounts for the following cases:
if ((rectA.getX() <= rectB.getX()) && (rectA.getRight() >= rectB.getRight()))
{
/* Case x.1:
*
* rectA
* | |
* | _________ |
* | | | |
* |________|_______|______|
* | |
* | |
* rectB
*/
overlapAmount[0] += Math.min((rectB.getX() - rectA.getX()),
(rectA.getRight() - rectB.getRight()));
}
else if ((rectB.getX() <= rectA.getX()) && (rectB.getRight() >= rectA.getRight()))
{
/* Case x.2:
*
* rectB
* | |
* | _________ |
* | | | |
* |________|_______|______|
* | |
* | |
* rectA
*/
overlapAmount[0] += Math.min((rectA.getX() - rectB.getX()),
(rectB.getRight() - rectA.getRight()));
}
if ((rectA.getY() <= rectB.getY()) && (rectA.getBottom() >= rectB.getBottom()))
{
/* Case y.1:
* ________ rectA
* |
* |
* ______|____ rectB
* | |
* | |
* ______|____|
* |
* |
* |________
*
*/
overlapAmount[1] += Math.min((rectB.getY() - rectA.getY()),
(rectA.getBottom() - rectB.getBottom()));
}
else if ((rectB.getY() <= rectA.getY()) && (rectB.getBottom() >= rectA.getBottom()))
{
/* Case y.2:
* ________ rectB
* |
* |
* ______|____ rectA
* | |
* | |
* ______|____|
* |
* |
* |________
*
*/
overlapAmount[1] += Math.min((rectA.getY() - rectB.getY()),
(rectB.getBottom() - rectA.getBottom()));
}
// find slope of the line passes two centers
let slope = Math.abs((rectB.getCenterY() - rectA.getCenterY()) /
(rectB.getCenterX() - rectA.getCenterX()));
// if centers are overlapped
if ((rectB.getCenterY() === rectA.getCenterY()) &&
(rectB.getCenterX() === rectA.getCenterX()))
{
// assume the slope is 1 (45 degree)
slope = 1.0;
}
let moveByY = slope * overlapAmount[0];
let moveByX = overlapAmount[1] / slope;
if (overlapAmount[0] < moveByX)
{
moveByX = overlapAmount[0];
}
else
{
moveByY = overlapAmount[1];
}
// return half the amount so that if each rectangle is moved by these
// amounts in opposite directions, overlap will be resolved
overlapAmount[0] = -1 * directions[0] * ((moveByX / 2) + separationBuffer);
overlapAmount[1] = -1 * directions[1] * ((moveByY / 2) + separationBuffer);
};
/**
* This method decides the separation direction of overlapping nodes
*
* if directions[0] = -1, then rectA goes left
* if directions[0] = 1, then rectA goes right
* if directions[1] = -1, then rectA goes up
* if directions[1] = 1, then rectA goes down
*/
IGeometry.decideDirectionsForOverlappingNodes = function (rectA, rectB, directions)
{
if (rectA.getCenterX() < rectB.getCenterX())
{
directions[0] = -1;
}
else
{
directions[0] = 1;
}
if (rectA.getCenterY() < rectB.getCenterY())
{
directions[1] = -1;
}
else
{
directions[1] = 1;
}
};
/**
* This method calculates the intersection (clipping) points of the two
* input rectangles with line segment defined by the centers of these two
* rectangles. The clipping points are saved in the input double array and
* whether or not the two rectangles overlap is returned.
*/
IGeometry.getIntersection2 = function(rectA, rectB, result)
{
//result[0-1] will contain clipPoint of rectA, result[2-3] will contain clipPoint of rectB
let p1x = rectA.getCenterX();
let p1y = rectA.getCenterY();
let p2x = rectB.getCenterX();
let p2y = rectB.getCenterY();
//if two rectangles intersect, then clipping points are centers
if (rectA.intersects(rectB))
{
result[0] = p1x;
result[1] = p1y;
result[2] = p2x;
result[3] = p2y;
return true;
}
//variables for rectA
let topLeftAx = rectA.getX();
let topLeftAy = rectA.getY();
let topRightAx = rectA.getRight();
let bottomLeftAx = rectA.getX();
let bottomLeftAy = rectA.getBottom();
let bottomRightAx = rectA.getRight();
let halfWidthA = rectA.getWidthHalf();
let halfHeightA = rectA.getHeightHalf();
//variables for rectB
let topLeftBx = rectB.getX();
let topLeftBy = rectB.getY();
let topRightBx = rectB.getRight();
let bottomLeftBx = rectB.getX();
let bottomLeftBy = rectB.getBottom();
let bottomRightBx = rectB.getRight();
let halfWidthB = rectB.getWidthHalf();
let halfHeightB = rectB.getHeightHalf();
//flag whether clipping points are found
let clipPointAFound = false;
let clipPointBFound = false;
// line is vertical
if (p1x === p2x)
{
if (p1y > p2y)
{
result[0] = p1x;
result[1] = topLeftAy;
result[2] = p2x;
result[3] = bottomLeftBy;
return false;
}
else if (p1y < p2y)
{
result[0] = p1x;
result[1] = bottomLeftAy;
result[2] = p2x;
result[3] = topLeftBy;
return false;
}
else
{
//not line, return null;
}
}
// line is horizontal
else if (p1y === p2y)
{
if (p1x > p2x)
{
result[0] = topLeftAx;
result[1] = p1y;
result[2] = topRightBx;
result[3] = p2y;
return false;
}
else if (p1x < p2x)
{
result[0] = topRightAx;
result[1] = p1y;
result[2] = topLeftBx;
result[3] = p2y;
return false;
}
else
{
//not valid line, return null;
}
}
else
{
//slopes of rectA's and rectB's diagonals
let slopeA = rectA.height / rectA.width;
let slopeB = rectB.height / rectB.width;
//slope of line between center of rectA and center of rectB
let slopePrime = (p2y - p1y) / (p2x - p1x);
let cardinalDirectionA;
let cardinalDirectionB;
let tempPointAx;
let tempPointAy;
let tempPointBx;
let tempPointBy;
//determine whether clipping point is the corner of nodeA
if ((-slopeA) === slopePrime)
{
if (p1x > p2x)
{
result[0] = bottomLeftAx;
result[1] = bottomLeftAy;
clipPointAFound = true;
}
else
{
result[0] = topRightAx;
result[1] = topLeftAy;
clipPointAFound = true;
}
}
else if (slopeA === slopePrime)
{
if (p1x > p2x)
{
result[0] = topLeftAx;
result[1] = topLeftAy;
clipPointAFound = true;
}
else
{
result[0] = bottomRightAx;
result[1] = bottomLeftAy;
clipPointAFound = true;
}
}
//determine whether clipping point is the corner of nodeB
if ((-slopeB) === slopePrime)
{
if (p2x > p1x)
{
result[2] = bottomLeftBx;
result[3] = bottomLeftBy;
clipPointBFound = true;
}
else
{
result[2] = topRightBx;
result[3] = topLeftBy;
clipPointBFound = true;
}
}
else if (slopeB === slopePrime)
{
if (p2x > p1x)
{
result[2] = topLeftBx;
result[3] = topLeftBy;
clipPointBFound = true;
}
else
{
result[2] = bottomRightBx;
result[3] = bottomLeftBy;
clipPointBFound = true;
}
}
//if both clipping points are corners
if (clipPointAFound && clipPointBFound)
{
return false;
}
//determine Cardinal Direction of rectangles
if (p1x > p2x)
{
if (p1y > p2y)
{
cardinalDirectionA = this.getCardinalDirection(slopeA, slopePrime, 4);
cardinalDirectionB = this.getCardinalDirection(slopeB, slopePrime, 2);
}
else
{
cardinalDirectionA = this.getCardinalDirection(-slopeA, slopePrime, 3);
cardinalDirectionB = this.getCardinalDirection(-slopeB, slopePrime, 1);
}
}
else
{
if (p1y > p2y)
{
cardinalDirectionA = this.getCardinalDirection(-slopeA, slopePrime, 1);
cardinalDirectionB = this.getCardinalDirection(-slopeB, slopePrime, 3);
}
else
{
cardinalDirectionA = this.getCardinalDirection(slopeA, slopePrime, 2);
cardinalDirectionB = this.getCardinalDirection(slopeB, slopePrime, 4);
}
}
//calculate clipping Point if it is not found before
if (!clipPointAFound)
{
switch (cardinalDirectionA)
{
case 1:
tempPointAy = topLeftAy;
tempPointAx = p1x + (-halfHeightA) / slopePrime;
result[0] = tempPointAx;
result[1] = tempPointAy;
break;
case 2:
tempPointAx = bottomRightAx;
tempPointAy = p1y + halfWidthA * slopePrime;
result[0] = tempPointAx;
result[1] = tempPointAy;
break;
case 3:
tempPointAy = bottomLeftAy;
tempPointAx = p1x + halfHeightA / slopePrime;
result[0] = tempPointAx;
result[1] = tempPointAy;
break;
case 4:
tempPointAx = bottomLeftAx;
tempPointAy = p1y + (-halfWidthA) * slopePrime;
result[0] = tempPointAx;
result[1] = tempPointAy;
break;
}
}
if (!clipPointBFound)
{
switch (cardinalDirectionB)
{
case 1:
tempPointBy = topLeftBy;
tempPointBx = p2x + (-halfHeightB) / slopePrime;
result[2] = tempPointBx;
result[3] = tempPointBy;
break;
case 2:
tempPointBx = bottomRightBx;
tempPointBy = p2y + halfWidthB * slopePrime;
result[2] = tempPointBx;
result[3] = tempPointBy;
break;
case 3:
tempPointBy = bottomLeftBy;
tempPointBx = p2x + halfHeightB / slopePrime;
result[2] = tempPointBx;
result[3] = tempPointBy;
break;
case 4:
tempPointBx = bottomLeftBx;
tempPointBy = p2y + (-halfWidthB) * slopePrime;
result[2] = tempPointBx;
result[3] = tempPointBy;
break;
}
}
}
return false;
};
/**
* This method returns in which cardinal direction does input point stays
* 1: North
* 2: East
* 3: South
* 4: West
*/
IGeometry.getCardinalDirection = function (slope, slopePrime, line)
{
if (slope > slopePrime)
{
return line;
}
else
{
return 1 + line % 4;
}
};
/**
* This method calculates the intersection of the two lines defined by
* point pairs (s1,s2) and (f1,f2).
*/
IGeometry.getIntersection = function(s1, s2, f1, f2)
{
if (f2 == null) {
return this.getIntersection2(s1, s2, f1);
}
let x1 = s1.x;
let y1 = s1.y;
let x2 = s2.x;
let y2 = s2.y;
let x3 = f1.x;
let y3 = f1.y;
let x4 = f2.x;
let y4 = f2.y;
let x, y; // intersection point
let a1, a2, b1, b2, c1, c2; // coefficients of line eqns.
let denom;
a1 = y2 - y1;
b1 = x1 - x2;
c1 = x2 * y1 - x1 * y2; // { a1*x + b1*y + c1 = 0 is line 1 }
a2 = y4 - y3;
b2 = x3 - x4;
c2 = x4 * y3 - x3 * y4; // { a2*x + b2*y + c2 = 0 is line 2 }
denom = a1 * b2 - a2 * b1;
if (denom === 0)
{
return null;
}
x = (b1 * c2 - b2 * c1) / denom;
y = (a2 * c1 - a1 * c2) / denom;
return new Point(x, y);
};
/**
* This method finds and returns the angle of the vector from the + x-axis
* in clockwise direction (compatible w/ Java coordinate system!).
*/
IGeometry.angleOfVector = function(Cx, Cy, Nx, Ny)
{
let C_angle;
if (Cx !== Nx)
{
C_angle = Math.atan((Ny - Cy) / (Nx - Cx));
if (Nx < Cx)
{
C_angle += Math.PI;
}
else if (Ny < Cy)
{
C_angle += this.TWO_PI;
}
}
else if (Ny < Cy)
{
C_angle = this.ONE_AND_HALF_PI; // 270 degrees
}
else
{
C_angle = this.HALF_PI; // 90 degrees
}
return C_angle;
};
/**
* This method checks whether the given two line segments (one with point
* p1 and p2, the other with point p3 and p4) intersect at a point other
* than these points.
*/
IGeometry.doIntersect = function(p1, p2, p3, p4){
let a = p1.x;
let b = p1.y;
let c = p2.x;
let d = p2.y;
let p = p3.x;
let q = p3.y;
let r = p4.x;
let s = p4.y;
let det = (c - a) * (s - q) - (r - p) * (d - b);
if (det === 0) {
return false;
} else {
let lambda = ((s - q) * (r - a) + (p - r) * (s - b)) / det;
let gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det;
return (0 < lambda && lambda < 1) && (0 < gamma && gamma < 1);
}
};
/**
* This method checks and calculates the intersection of
* a line segment and a circle.
*/
IGeometry.findCircleLineIntersections = function(Ex, Ey, Lx, Ly, Cx, Cy, r) {
// E is the starting point of the ray,
// L is the end point of the ray,
// C is the center of sphere you're testing against
// r is the radius of that sphere
// Compute:
// d = L - E ( Direction vector of ray, from start to end )
// f = E - C ( Vector from center sphere to ray start )
// Then the intersection is found by..
// P = E + t * d
// This is a parametric equation:
// Px = Ex + tdx
// Py = Ey + tdy
// get a, b, c values
let a = (Lx-Ex)*(Lx-Ex) + (Ly-Ey)*(Ly-Ey);
let b = 2*((Ex-Cx)*(Lx-Ex)+(Ey-Cy)*(Ly-Ey)) ;
let c = (Ex-Cx)*(Ex-Cx)+(Ey-Cy)*(Ey-Cy) - r*r ;
// get discriminant
var disc = b*b - 4 * a * c;
if (disc >= 0) {
// insert into quadratic formula
let t1 = (-b + Math.sqrt(b*b - 4 * a * c)) / (2 * a);
let t2 = (-b - Math.sqrt(b*b - 4 * a * c)) / (2 * a);
let intersections = null;
if( t1 >= 0 && t1 <= 1 )
{
// t1 is the intersection, and it's closer than t2
// (since t1 uses -b - discriminant)
// Impale, Poke
return [t1];
}
// here t1 didn't intersect so we are either started
// inside the sphere or completely past it
if( t2 >= 0 && t2 <= 1 )
{
// ExitWound
return [t2] ;
}
return intersections;
}
else
return null;
};
// -----------------------------------------------------------------------------
// Section: Class Constants
// -----------------------------------------------------------------------------
/**
* Some useful pre-calculated constants
*/
IGeometry.HALF_PI = 0.5 * Math.PI;
IGeometry.ONE_AND_HALF_PI = 1.5 * Math.PI;
IGeometry.TWO_PI = 2.0 * Math.PI;
IGeometry.THREE_PI = 3.0 * Math.PI;
module.exports = IGeometry;

View File

@@ -0,0 +1,30 @@
function IMath() {
}
/**
* This method returns the sign of the input value.
*/
IMath.sign = function (value) {
if (value > 0)
{
return 1;
}
else if (value < 0)
{
return -1;
}
else
{
return 0;
}
};
IMath.floor = function (value) {
return value < 0 ? Math.ceil(value) : Math.floor(value);
};
IMath.ceil = function (value) {
return value < 0 ? Math.floor(value) : Math.ceil(value);
};
module.exports = IMath;

View File

@@ -0,0 +1,7 @@
function Integer() {
}
Integer.MAX_VALUE = 2147483647;
Integer.MIN_VALUE = -2147483648;
module.exports = Integer;

View File

@@ -0,0 +1,639 @@
// Singular Value Decomposition implementation
function SVD() {
};
/* Below singular value decomposition (svd) code including hypot function is adopted from https://github.com/dragonfly-ai/JamaJS
Some changes are applied to make the code compatible with the fcose code and to make it independent from Jama.
Input matrix is changed to a 2D array instead of Jama matrix. Matrix dimensions are taken according to 2D array instead of using Jama functions.
An object that includes singular value components is created for return.
The types of input parameters of the hypot function are removed.
let is used instead of var for the variable initialization.
*/
/*
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*/
SVD.svd = function (A) {
this.U = null;
this.V = null;
this.s = null;
this.m = 0;
this.n = 0;
this.m = A.length;
this.n = A[0].length;
let nu = Math.min(this.m, this.n);
this.s = (function (s) {
let a = [];
while (s-- > 0)
a.push(0);
return a;
})(Math.min(this.m + 1, this.n));
this.U = (function (dims) {
let allocate = function (dims) {
if (dims.length == 0) {
return 0;
} else {
let array = [];
for (let i = 0; i < dims[0]; i++) {
array.push(allocate(dims.slice(1)));
}
return array;
}
};
return allocate(dims);
})([this.m, nu]);
this.V = (function (dims) {
let allocate = function (dims) {
if (dims.length == 0) {
return 0;
} else {
let array = [];
for (let i = 0; i < dims[0]; i++) {
array.push(allocate(dims.slice(1)));
}
return array;
}
};
return allocate(dims);
})([this.n, this.n]);
let e = (function (s) {
let a = [];
while (s-- > 0)
a.push(0);
return a;
})(this.n);
let work = (function (s) {
let a = [];
while (s-- > 0)
a.push(0);
return a;
})(this.m);
let wantu = true;
let wantv = true;
let nct = Math.min(this.m - 1, this.n);
let nrt = Math.max(0, Math.min(this.n - 2, this.m));
for (let k = 0; k < Math.max(nct, nrt); k++) {
if (k < nct) {
this.s[k] = 0;
for (let i = k; i < this.m; i++) {
this.s[k] = SVD.hypot(this.s[k], A[i][k]);
}
;
if (this.s[k] !== 0.0) {
if (A[k][k] < 0.0) {
this.s[k] = -this.s[k];
}
for (let i = k; i < this.m; i++) {
A[i][k] /= this.s[k];
}
;
A[k][k] += 1.0;
}
this.s[k] = -this.s[k];
}
for (let j = k + 1; j < this.n; j++) {
if ((function (lhs, rhs) {
return lhs && rhs;
})((k < nct), (this.s[k] !== 0.0))) {
let t = 0;
for (let i = k; i < this.m; i++) {
t += A[i][k] * A[i][j];
}
;
t = -t / A[k][k];
for (let i = k; i < this.m; i++) {
A[i][j] += t * A[i][k];
}
;
}
e[j] = A[k][j];
}
;
if ((function (lhs, rhs) {
return lhs && rhs;
})(wantu, (k < nct))) {
for (let i = k; i < this.m; i++) {
this.U[i][k] = A[i][k];
}
;
}
if (k < nrt) {
e[k] = 0;
for (let i = k + 1; i < this.n; i++) {
e[k] = SVD.hypot(e[k], e[i]);
}
;
if (e[k] !== 0.0) {
if (e[k + 1] < 0.0) {
e[k] = -e[k];
}
for (let i = k + 1; i < this.n; i++) {
e[i] /= e[k];
}
;
e[k + 1] += 1.0;
}
e[k] = -e[k];
if ((function (lhs, rhs) {
return lhs && rhs;
})((k + 1 < this.m), (e[k] !== 0.0))) {
for (let i = k + 1; i < this.m; i++) {
work[i] = 0.0;
}
;
for (let j = k + 1; j < this.n; j++) {
for (let i = k + 1; i < this.m; i++) {
work[i] += e[j] * A[i][j];
}
;
}
;
for (let j = k + 1; j < this.n; j++) {
let t = -e[j] / e[k + 1];
for (let i = k + 1; i < this.m; i++) {
A[i][j] += t * work[i];
}
;
}
;
}
if (wantv) {
for (let i = k + 1; i < this.n; i++) {
this.V[i][k] = e[i];
};
}
}
};
let p = Math.min(this.n, this.m + 1);
if (nct < this.n) {
this.s[nct] = A[nct][nct];
}
if (this.m < p) {
this.s[p - 1] = 0.0;
}
if (nrt + 1 < p) {
e[nrt] = A[nrt][p - 1];
}
e[p - 1] = 0.0;
if (wantu) {
for (let j = nct; j < nu; j++) {
for (let i = 0; i < this.m; i++) {
this.U[i][j] = 0.0;
}
;
this.U[j][j] = 1.0;
};
for (let k = nct - 1; k >= 0; k--) {
if (this.s[k] !== 0.0) {
for (let j = k + 1; j < nu; j++) {
let t = 0;
for (let i = k; i < this.m; i++) {
t += this.U[i][k] * this.U[i][j];
};
t = -t / this.U[k][k];
for (let i = k; i < this.m; i++) {
this.U[i][j] += t * this.U[i][k];
};
};
for (let i = k; i < this.m; i++) {
this.U[i][k] = -this.U[i][k];
};
this.U[k][k] = 1.0 + this.U[k][k];
for (let i = 0; i < k - 1; i++) {
this.U[i][k] = 0.0;
};
} else {
for (let i = 0; i < this.m; i++) {
this.U[i][k] = 0.0;
};
this.U[k][k] = 1.0;
}
};
}
if (wantv) {
for (let k = this.n - 1; k >= 0; k--) {
if ((function (lhs, rhs) {
return lhs && rhs;
})((k < nrt), (e[k] !== 0.0))) {
for (let j = k + 1; j < nu; j++) {
let t = 0;
for (let i = k + 1; i < this.n; i++) {
t += this.V[i][k] * this.V[i][j];
};
t = -t / this.V[k + 1][k];
for (let i = k + 1; i < this.n; i++) {
this.V[i][j] += t * this.V[i][k];
};
};
}
for (let i = 0; i < this.n; i++) {
this.V[i][k] = 0.0;
};
this.V[k][k] = 1.0;
};
}
let pp = p - 1;
let iter = 0;
let eps = Math.pow(2.0, -52.0);
let tiny = Math.pow(2.0, -966.0);
while ((p > 0)) {
let k = void 0;
let kase = void 0;
for (k = p - 2; k >= -1; k--) {
if (k === -1) {
break;
}
if (Math.abs(e[k]) <= tiny + eps * (Math.abs(this.s[k]) + Math.abs(this.s[k + 1]))) {
e[k] = 0.0;
break;
}
};
if (k === p - 2) {
kase = 4;
} else {
let ks = void 0;
for (ks = p - 1; ks >= k; ks--) {
if (ks === k) {
break;
}
let t = (ks !== p ? Math.abs(e[ks]) : 0.0) + (ks !== k + 1 ? Math.abs(e[ks - 1]) : 0.0);
if (Math.abs(this.s[ks]) <= tiny + eps * t) {
this.s[ks] = 0.0;
break;
}
};
if (ks === k) {
kase = 3;
} else if (ks === p - 1) {
kase = 1;
} else {
kase = 2;
k = ks;
}
}
k++;
switch ((kase)) {
case 1:
{
let f = e[p - 2];
e[p - 2] = 0.0;
for (let j = p - 2; j >= k; j--) {
let t = SVD.hypot(this.s[j], f);
let cs = this.s[j] / t;
let sn = f / t;
this.s[j] = t;
if (j !== k) {
f = -sn * e[j - 1];
e[j - 1] = cs * e[j - 1];
}
if (wantv) {
for (let i = 0; i < this.n; i++) {
t = cs * this.V[i][j] + sn * this.V[i][p - 1];
this.V[i][p - 1] = -sn * this.V[i][j] + cs * this.V[i][p - 1];
this.V[i][j] = t;
};
}
};
};
break;
case 2:
{
let f = e[k - 1];
e[k - 1] = 0.0;
for (let j = k; j < p; j++) {
let t = SVD.hypot(this.s[j], f);
let cs = this.s[j] / t;
let sn = f / t;
this.s[j] = t;
f = -sn * e[j];
e[j] = cs * e[j];
if (wantu) {
for (let i = 0; i < this.m; i++) {
t = cs * this.U[i][j] + sn * this.U[i][k - 1];
this.U[i][k - 1] = -sn * this.U[i][j] + cs * this.U[i][k - 1];
this.U[i][j] = t;
};
}
};
};
break;
case 3:
{
let scale = Math.max(Math.max(Math.max(Math.max(Math.abs(this.s[p - 1]), Math.abs(this.s[p - 2])), Math.abs(e[p - 2])), Math.abs(this.s[k])), Math.abs(e[k]));
let sp = this.s[p - 1] / scale;
let spm1 = this.s[p - 2] / scale;
let epm1 = e[p - 2] / scale;
let sk = this.s[k] / scale;
let ek = e[k] / scale;
let b = ((spm1 + sp) * (spm1 - sp) + epm1 * epm1) / 2.0;
let c = (sp * epm1) * (sp * epm1);
let shift = 0.0;
if ((function (lhs, rhs) {
return lhs || rhs;
})((b !== 0.0), (c !== 0.0))) {
shift = Math.sqrt(b * b + c);
if (b < 0.0) {
shift = -shift;
}
shift = c / (b + shift);
}
let f = (sk + sp) * (sk - sp) + shift;
let g = sk * ek;
for (let j = k; j < p - 1; j++) {
let t = SVD.hypot(f, g);
let cs = f / t;
let sn = g / t;
if (j !== k) {
e[j - 1] = t;
}
f = cs * this.s[j] + sn * e[j];
e[j] = cs * e[j] - sn * this.s[j];
g = sn * this.s[j + 1];
this.s[j + 1] = cs * this.s[j + 1];
if (wantv) {
for (let i = 0; i < this.n; i++) {
t = cs * this.V[i][j] + sn * this.V[i][j + 1];
this.V[i][j + 1] = -sn * this.V[i][j] + cs * this.V[i][j + 1];
this.V[i][j] = t;
};
}
t = SVD.hypot(f, g);
cs = f / t;
sn = g / t;
this.s[j] = t;
f = cs * e[j] + sn * this.s[j + 1];
this.s[j + 1] = -sn * e[j] + cs * this.s[j + 1];
g = sn * e[j + 1];
e[j + 1] = cs * e[j + 1];
if (wantu && (j < this.m - 1)) {
for (let i = 0; i < this.m; i++) {
t = cs * this.U[i][j] + sn * this.U[i][j + 1];
this.U[i][j + 1] = -sn * this.U[i][j] + cs * this.U[i][j + 1];
this.U[i][j] = t;
};
}
};
e[p - 2] = f;
iter = iter + 1;
};
break;
case 4:
{
if (this.s[k] <= 0.0) {
this.s[k] = (this.s[k] < 0.0 ? -this.s[k] : 0.0);
if (wantv) {
for (let i = 0; i <= pp; i++) {
this.V[i][k] = -this.V[i][k];
};
}
}
while ((k < pp)) {
if (this.s[k] >= this.s[k + 1]) {
break;
}
let t = this.s[k];
this.s[k] = this.s[k + 1];
this.s[k + 1] = t;
if (wantv && (k < this.n - 1)) {
for (let i = 0; i < this.n; i++) {
t = this.V[i][k + 1];
this.V[i][k + 1] = this.V[i][k];
this.V[i][k] = t;
};
}
if (wantu && (k < this.m - 1)) {
for (let i = 0; i < this.m; i++) {
t = this.U[i][k + 1];
this.U[i][k + 1] = this.U[i][k];
this.U[i][k] = t;
};
}
k++;
};
iter = 0;
p--;
};
break;
}
};
let result = {U: this.U, V: this.V, S: this.s};
return result;
};
// sqrt(a^2 + b^2) without under/overflow.
SVD.hypot = function(a, b) {
let r;
if (Math.abs(a) > Math.abs(b)) {
r = b/a;
r = Math.abs(a)*Math.sqrt(1+r*r);
} else if (b != 0) {
r = a/b;
r = Math.abs(b)*Math.sqrt(1+r*r);
} else {
r = 0.0;
}
return r;
};
module.exports = SVD;

9
frontend/node_modules/cytoscape-fcose/src/assign.js generated vendored Normal file
View File

@@ -0,0 +1,9 @@
// Simple, internal Object.assign() polyfill for options objects etc.
module.exports = Object.assign != null ? Object.assign.bind( Object ) : function( tgt, ...srcs ){
srcs.forEach( src => {
Object.keys( src ).forEach( k => tgt[k] = src[k] );
} );
return tgt;
};

View File

@@ -0,0 +1,269 @@
/*
* Auxiliary functions
*/
const LinkedList = require('cose-base').layoutBase.LinkedList;
let auxiliary = {};
// get the top most nodes
auxiliary.getTopMostNodes = function(nodes) {
let nodesMap = {};
for (let i = 0; i < nodes.length; i++) {
nodesMap[nodes[i].id()] = true;
}
let roots = nodes.filter(function (ele, i) {
if(typeof ele === "number") {
ele = i;
}
let parent = ele.parent()[0];
while(parent != null){
if(nodesMap[parent.id()]){
return false;
}
parent = parent.parent()[0];
}
return true;
});
return roots;
};
// find disconnected components and create dummy nodes that connect them
auxiliary.connectComponents = function(cy, eles, topMostNodes, dummyNodes){
let queue = new LinkedList();
let visited = new Set();
let visitedTopMostNodes = [];
let currentNeighbor;
let minDegreeNode;
let minDegree;
let isConnected = false;
let count = 1;
let nodesConnectedToDummy = [];
let components = [];
do{
let cmpt = cy.collection();
components.push(cmpt);
let currentNode = topMostNodes[0];
let childrenOfCurrentNode = cy.collection();
childrenOfCurrentNode.merge(currentNode).merge(currentNode.descendants().intersection(eles));
visitedTopMostNodes.push(currentNode);
childrenOfCurrentNode.forEach(function(node) {
queue.push(node);
visited.add(node);
cmpt.merge(node);
});
while(queue.length != 0){
currentNode = queue.shift();
// Traverse all neighbors of this node
let neighborNodes = cy.collection();
currentNode.neighborhood().nodes().forEach(function(node){
if(eles.intersection(currentNode.edgesWith(node)).length > 0){
neighborNodes.merge(node);
}
});
for(let i = 0; i < neighborNodes.length; i++){
let neighborNode = neighborNodes[i];
currentNeighbor = topMostNodes.intersection(neighborNode.union(neighborNode.ancestors()));
if(currentNeighbor != null && !visited.has(currentNeighbor[0])){
let childrenOfNeighbor = currentNeighbor.union(currentNeighbor.descendants());
childrenOfNeighbor.forEach(function(node){
queue.push(node);
visited.add(node);
cmpt.merge(node);
if(topMostNodes.has(node)){
visitedTopMostNodes.push(node);
}
});
}
}
}
cmpt.forEach(node => {
eles.intersection(node.connectedEdges()).forEach(e => { // connectedEdges() usually cached
if( cmpt.has(e.source()) && cmpt.has(e.target()) ){ // has() is cheap
cmpt.merge(e);
}
});
});
if(visitedTopMostNodes.length == topMostNodes.length){
isConnected = true;
}
if(!isConnected || (isConnected && count > 1)){
minDegreeNode = visitedTopMostNodes[0];
minDegree = minDegreeNode.connectedEdges().length;
visitedTopMostNodes.forEach(function(node){
if(node.connectedEdges().length < minDegree){
minDegree = node.connectedEdges().length;
minDegreeNode = node;
}
});
nodesConnectedToDummy.push(minDegreeNode.id());
// TO DO: Check efficiency of this part
let temp = cy.collection();
temp.merge(visitedTopMostNodes[0]);
visitedTopMostNodes.forEach(function(node){
temp.merge(node);
});
visitedTopMostNodes = [];
topMostNodes = topMostNodes.difference(temp);
count++;
}
}
while(!isConnected);
if(dummyNodes){
if(nodesConnectedToDummy.length > 0 ){
dummyNodes.set('dummy'+(dummyNodes.size+1), nodesConnectedToDummy);
}
}
return components;
};
// relocates componentResult to originalCenter if there is no fixedNodeConstraint
auxiliary.relocateComponent = function(originalCenter, componentResult, options) {
if (!options.fixedNodeConstraint) {
let minXCoord = Number.POSITIVE_INFINITY;
let maxXCoord = Number.NEGATIVE_INFINITY;
let minYCoord = Number.POSITIVE_INFINITY;
let maxYCoord = Number.NEGATIVE_INFINITY;
if (options.quality == "draft") {
// calculate current bounding box
for (let [key, value] of componentResult.nodeIndexes) {
let cyNode = options.cy.getElementById(key);
if (cyNode) {
let nodeBB = cyNode.boundingBox();
let leftX = componentResult.xCoords[value] - nodeBB.w / 2;
let rightX = componentResult.xCoords[value] + nodeBB.w / 2;
let topY = componentResult.yCoords[value] - nodeBB.h / 2;
let bottomY = componentResult.yCoords[value] + nodeBB.h / 2;
if (leftX < minXCoord)
minXCoord = leftX;
if (rightX > maxXCoord)
maxXCoord = rightX;
if (topY < minYCoord)
minYCoord = topY;
if (bottomY > maxYCoord)
maxYCoord = bottomY;
}
}
// find difference between current and original center
let diffOnX = originalCenter.x - (maxXCoord + minXCoord) / 2;
let diffOnY = originalCenter.y - (maxYCoord + minYCoord) / 2;
// move component to original center
componentResult.xCoords = componentResult.xCoords.map(x => x + diffOnX);
componentResult.yCoords = componentResult.yCoords.map(y => y + diffOnY);
}
else {
// calculate current bounding box
Object.keys(componentResult).forEach(function (item) {
let node = componentResult[item];
let leftX = node.getRect().x;
let rightX = node.getRect().x + node.getRect().width;
let topY = node.getRect().y;
let bottomY = node.getRect().y + node.getRect().height;
if (leftX < minXCoord)
minXCoord = leftX;
if (rightX > maxXCoord)
maxXCoord = rightX;
if (topY < minYCoord)
minYCoord = topY;
if (bottomY > maxYCoord)
maxYCoord = bottomY;
});
// find difference between current and original center
let diffOnX = originalCenter.x - (maxXCoord + minXCoord) / 2;
let diffOnY = originalCenter.y - (maxYCoord + minYCoord) / 2;
// move component to original center
Object.keys(componentResult).forEach(function (item) {
let node = componentResult[item];
node.setCenter(node.getCenterX() + diffOnX, node.getCenterY() + diffOnY);
});
}
}
};
auxiliary.calcBoundingBox = function(parentNode, xCoords, yCoords, nodeIndexes){
// calculate bounds
let left = Number.MAX_SAFE_INTEGER;
let right = Number.MIN_SAFE_INTEGER;
let top = Number.MAX_SAFE_INTEGER;
let bottom = Number.MIN_SAFE_INTEGER;
let nodeLeft;
let nodeRight;
let nodeTop;
let nodeBottom;
let nodes = parentNode.descendants().not(":parent");
let s = nodes.length;
for (let i = 0; i < s; i++)
{
let node = nodes[i];
nodeLeft = xCoords[nodeIndexes.get(node.id())] - node.width()/2;
nodeRight = xCoords[nodeIndexes.get(node.id())] + node.width()/2;
nodeTop = yCoords[nodeIndexes.get(node.id())] - node.height()/2;
nodeBottom = yCoords[nodeIndexes.get(node.id())] + node.height()/2;
if (left > nodeLeft)
{
left = nodeLeft;
}
if (right < nodeRight)
{
right = nodeRight;
}
if (top > nodeTop)
{
top = nodeTop;
}
if (bottom < nodeBottom)
{
bottom = nodeBottom;
}
}
let boundingBox = {};
boundingBox.topLeftX = left;
boundingBox.topLeftY = top;
boundingBox.width = right - left;
boundingBox.height = bottom - top;
return boundingBox;
};
// This function finds and returns parent nodes whose all children are hidden
auxiliary.calcParentsWithoutChildren = function(cy, eles){
let parentsWithoutChildren = cy.collection();
eles.nodes(':parent').forEach((parent) => {
let check = false;
parent.children().forEach((child) => {
if(child.css('display') != 'none') {
check = true;
}
});
if(!check) {
parentsWithoutChildren.merge(parent);
}
});
return parentsWithoutChildren;
}
module.exports = auxiliary;