|
/*
|
* Licensed to the Apache Software Foundation (ASF) under one
|
* or more contributor license agreements. See the NOTICE file
|
* distributed with this work for additional information
|
* regarding copyright ownership. The ASF licenses this file
|
* to you under the Apache License, Version 2.0 (the
|
* "License"); you may not use this file except in compliance
|
* with the License. You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing,
|
* software distributed under the License is distributed on an
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
* KIND, either express or implied. See the License for the
|
* specific language governing permissions and limitations
|
* under the License.
|
*/
|
|
|
/**
|
* AUTO-GENERATED FILE. DO NOT MODIFY.
|
*/
|
|
/*
|
* Licensed to the Apache Software Foundation (ASF) under one
|
* or more contributor license agreements. See the NOTICE file
|
* distributed with this work for additional information
|
* regarding copyright ownership. The ASF licenses this file
|
* to you under the Apache License, Version 2.0 (the
|
* "License"); you may not use this file except in compliance
|
* with the License. You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing,
|
* software distributed under the License is distributed on an
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
* KIND, either express or implied. See the License for the
|
* specific language governing permissions and limitations
|
* under the License.
|
*/
|
import * as layout from '../../util/layout.js';
|
import * as zrUtil from 'zrender/lib/core/util.js';
|
import { groupData } from '../../util/model.js';
|
export default function sankeyLayout(ecModel, api) {
|
ecModel.eachSeriesByType('sankey', function (seriesModel) {
|
var nodeWidth = seriesModel.get('nodeWidth');
|
var nodeGap = seriesModel.get('nodeGap');
|
var layoutInfo = getViewRect(seriesModel, api);
|
seriesModel.layoutInfo = layoutInfo;
|
var width = layoutInfo.width;
|
var height = layoutInfo.height;
|
var graph = seriesModel.getGraph();
|
var nodes = graph.nodes;
|
var edges = graph.edges;
|
computeNodeValues(nodes);
|
var filteredNodes = zrUtil.filter(nodes, function (node) {
|
return node.getLayout().value === 0;
|
});
|
var iterations = filteredNodes.length !== 0 ? 0 : seriesModel.get('layoutIterations');
|
var orient = seriesModel.get('orient');
|
var nodeAlign = seriesModel.get('nodeAlign');
|
layoutSankey(nodes, edges, nodeWidth, nodeGap, width, height, iterations, orient, nodeAlign);
|
});
|
}
|
/**
|
* Get the layout position of the whole view
|
*/
|
function getViewRect(seriesModel, api) {
|
return layout.getLayoutRect(seriesModel.getBoxLayoutParams(), {
|
width: api.getWidth(),
|
height: api.getHeight()
|
});
|
}
|
function layoutSankey(nodes, edges, nodeWidth, nodeGap, width, height, iterations, orient, nodeAlign) {
|
computeNodeBreadths(nodes, edges, nodeWidth, width, height, orient, nodeAlign);
|
computeNodeDepths(nodes, edges, height, width, nodeGap, iterations, orient);
|
computeEdgeDepths(nodes, orient);
|
}
|
/**
|
* Compute the value of each node by summing the associated edge's value
|
*/
|
function computeNodeValues(nodes) {
|
zrUtil.each(nodes, function (node) {
|
var value1 = sum(node.outEdges, getEdgeValue);
|
var value2 = sum(node.inEdges, getEdgeValue);
|
var nodeRawValue = node.getValue() || 0;
|
var value = Math.max(value1, value2, nodeRawValue);
|
node.setLayout({
|
value: value
|
}, true);
|
});
|
}
|
/**
|
* Compute the x-position for each node.
|
*
|
* Here we use Kahn algorithm to detect cycle when we traverse
|
* the node to computer the initial x position.
|
*/
|
function computeNodeBreadths(nodes, edges, nodeWidth, width, height, orient, nodeAlign) {
|
// Used to mark whether the edge is deleted. if it is deleted,
|
// the value is 0, otherwise it is 1.
|
var remainEdges = [];
|
// Storage each node's indegree.
|
var indegreeArr = [];
|
// Used to storage the node with indegree is equal to 0.
|
var zeroIndegrees = [];
|
var nextTargetNode = [];
|
var x = 0;
|
// let kx = 0;
|
for (var i = 0; i < edges.length; i++) {
|
remainEdges[i] = 1;
|
}
|
for (var i = 0; i < nodes.length; i++) {
|
indegreeArr[i] = nodes[i].inEdges.length;
|
if (indegreeArr[i] === 0) {
|
zeroIndegrees.push(nodes[i]);
|
}
|
}
|
var maxNodeDepth = -1;
|
// Traversing nodes using topological sorting to calculate the
|
// horizontal(if orient === 'horizontal') or vertical(if orient === 'vertical')
|
// position of the nodes.
|
while (zeroIndegrees.length) {
|
for (var idx = 0; idx < zeroIndegrees.length; idx++) {
|
var node = zeroIndegrees[idx];
|
var item = node.hostGraph.data.getRawDataItem(node.dataIndex);
|
var isItemDepth = item.depth != null && item.depth >= 0;
|
if (isItemDepth && item.depth > maxNodeDepth) {
|
maxNodeDepth = item.depth;
|
}
|
node.setLayout({
|
depth: isItemDepth ? item.depth : x
|
}, true);
|
orient === 'vertical' ? node.setLayout({
|
dy: nodeWidth
|
}, true) : node.setLayout({
|
dx: nodeWidth
|
}, true);
|
for (var edgeIdx = 0; edgeIdx < node.outEdges.length; edgeIdx++) {
|
var edge = node.outEdges[edgeIdx];
|
var indexEdge = edges.indexOf(edge);
|
remainEdges[indexEdge] = 0;
|
var targetNode = edge.node2;
|
var nodeIndex = nodes.indexOf(targetNode);
|
if (--indegreeArr[nodeIndex] === 0 && nextTargetNode.indexOf(targetNode) < 0) {
|
nextTargetNode.push(targetNode);
|
}
|
}
|
}
|
++x;
|
zeroIndegrees = nextTargetNode;
|
nextTargetNode = [];
|
}
|
for (var i = 0; i < remainEdges.length; i++) {
|
if (remainEdges[i] === 1) {
|
throw new Error('Sankey is a DAG, the original data has cycle!');
|
}
|
}
|
var maxDepth = maxNodeDepth > x - 1 ? maxNodeDepth : x - 1;
|
if (nodeAlign && nodeAlign !== 'left') {
|
adjustNodeWithNodeAlign(nodes, nodeAlign, orient, maxDepth);
|
}
|
var kx = orient === 'vertical' ? (height - nodeWidth) / maxDepth : (width - nodeWidth) / maxDepth;
|
scaleNodeBreadths(nodes, kx, orient);
|
}
|
function isNodeDepth(node) {
|
var item = node.hostGraph.data.getRawDataItem(node.dataIndex);
|
return item.depth != null && item.depth >= 0;
|
}
|
function adjustNodeWithNodeAlign(nodes, nodeAlign, orient, maxDepth) {
|
if (nodeAlign === 'right') {
|
var nextSourceNode = [];
|
var remainNodes = nodes;
|
var nodeHeight = 0;
|
while (remainNodes.length) {
|
for (var i = 0; i < remainNodes.length; i++) {
|
var node = remainNodes[i];
|
node.setLayout({
|
skNodeHeight: nodeHeight
|
}, true);
|
for (var j = 0; j < node.inEdges.length; j++) {
|
var edge = node.inEdges[j];
|
if (nextSourceNode.indexOf(edge.node1) < 0) {
|
nextSourceNode.push(edge.node1);
|
}
|
}
|
}
|
remainNodes = nextSourceNode;
|
nextSourceNode = [];
|
++nodeHeight;
|
}
|
zrUtil.each(nodes, function (node) {
|
if (!isNodeDepth(node)) {
|
node.setLayout({
|
depth: Math.max(0, maxDepth - node.getLayout().skNodeHeight)
|
}, true);
|
}
|
});
|
} else if (nodeAlign === 'justify') {
|
moveSinksRight(nodes, maxDepth);
|
}
|
}
|
/**
|
* All the node without outEgdes are assigned maximum x-position and
|
* be aligned in the last column.
|
*
|
* @param nodes. node of sankey view.
|
* @param maxDepth. use to assign to node without outEdges as x-position.
|
*/
|
function moveSinksRight(nodes, maxDepth) {
|
zrUtil.each(nodes, function (node) {
|
if (!isNodeDepth(node) && !node.outEdges.length) {
|
node.setLayout({
|
depth: maxDepth
|
}, true);
|
}
|
});
|
}
|
/**
|
* Scale node x-position to the width
|
*
|
* @param nodes node of sankey view
|
* @param kx multiple used to scale nodes
|
*/
|
function scaleNodeBreadths(nodes, kx, orient) {
|
zrUtil.each(nodes, function (node) {
|
var nodeDepth = node.getLayout().depth * kx;
|
orient === 'vertical' ? node.setLayout({
|
y: nodeDepth
|
}, true) : node.setLayout({
|
x: nodeDepth
|
}, true);
|
});
|
}
|
/**
|
* Using Gauss-Seidel iterations method to compute the node depth(y-position)
|
*
|
* @param nodes node of sankey view
|
* @param edges edge of sankey view
|
* @param height the whole height of the area to draw the view
|
* @param nodeGap the vertical distance between two nodes
|
* in the same column.
|
* @param iterations the number of iterations for the algorithm
|
*/
|
function computeNodeDepths(nodes, edges, height, width, nodeGap, iterations, orient) {
|
var nodesByBreadth = prepareNodesByBreadth(nodes, orient);
|
initializeNodeDepth(nodesByBreadth, edges, height, width, nodeGap, orient);
|
resolveCollisions(nodesByBreadth, nodeGap, height, width, orient);
|
for (var alpha = 1; iterations > 0; iterations--) {
|
// 0.99 is a experience parameter, ensure that each iterations of
|
// changes as small as possible.
|
alpha *= 0.99;
|
relaxRightToLeft(nodesByBreadth, alpha, orient);
|
resolveCollisions(nodesByBreadth, nodeGap, height, width, orient);
|
relaxLeftToRight(nodesByBreadth, alpha, orient);
|
resolveCollisions(nodesByBreadth, nodeGap, height, width, orient);
|
}
|
}
|
function prepareNodesByBreadth(nodes, orient) {
|
var nodesByBreadth = [];
|
var keyAttr = orient === 'vertical' ? 'y' : 'x';
|
var groupResult = groupData(nodes, function (node) {
|
return node.getLayout()[keyAttr];
|
});
|
groupResult.keys.sort(function (a, b) {
|
return a - b;
|
});
|
zrUtil.each(groupResult.keys, function (key) {
|
nodesByBreadth.push(groupResult.buckets.get(key));
|
});
|
return nodesByBreadth;
|
}
|
/**
|
* Compute the original y-position for each node
|
*/
|
function initializeNodeDepth(nodesByBreadth, edges, height, width, nodeGap, orient) {
|
var minKy = Infinity;
|
zrUtil.each(nodesByBreadth, function (nodes) {
|
var n = nodes.length;
|
var sum = 0;
|
zrUtil.each(nodes, function (node) {
|
sum += node.getLayout().value;
|
});
|
var ky = orient === 'vertical' ? (width - (n - 1) * nodeGap) / sum : (height - (n - 1) * nodeGap) / sum;
|
if (ky < minKy) {
|
minKy = ky;
|
}
|
});
|
zrUtil.each(nodesByBreadth, function (nodes) {
|
zrUtil.each(nodes, function (node, i) {
|
var nodeDy = node.getLayout().value * minKy;
|
if (orient === 'vertical') {
|
node.setLayout({
|
x: i
|
}, true);
|
node.setLayout({
|
dx: nodeDy
|
}, true);
|
} else {
|
node.setLayout({
|
y: i
|
}, true);
|
node.setLayout({
|
dy: nodeDy
|
}, true);
|
}
|
});
|
});
|
zrUtil.each(edges, function (edge) {
|
var edgeDy = +edge.getValue() * minKy;
|
edge.setLayout({
|
dy: edgeDy
|
}, true);
|
});
|
}
|
/**
|
* Resolve the collision of initialized depth (y-position)
|
*/
|
function resolveCollisions(nodesByBreadth, nodeGap, height, width, orient) {
|
var keyAttr = orient === 'vertical' ? 'x' : 'y';
|
zrUtil.each(nodesByBreadth, function (nodes) {
|
nodes.sort(function (a, b) {
|
return a.getLayout()[keyAttr] - b.getLayout()[keyAttr];
|
});
|
var nodeX;
|
var node;
|
var dy;
|
var y0 = 0;
|
var n = nodes.length;
|
var nodeDyAttr = orient === 'vertical' ? 'dx' : 'dy';
|
for (var i = 0; i < n; i++) {
|
node = nodes[i];
|
dy = y0 - node.getLayout()[keyAttr];
|
if (dy > 0) {
|
nodeX = node.getLayout()[keyAttr] + dy;
|
orient === 'vertical' ? node.setLayout({
|
x: nodeX
|
}, true) : node.setLayout({
|
y: nodeX
|
}, true);
|
}
|
y0 = node.getLayout()[keyAttr] + node.getLayout()[nodeDyAttr] + nodeGap;
|
}
|
var viewWidth = orient === 'vertical' ? width : height;
|
// If the bottommost node goes outside the bounds, push it back up
|
dy = y0 - nodeGap - viewWidth;
|
if (dy > 0) {
|
nodeX = node.getLayout()[keyAttr] - dy;
|
orient === 'vertical' ? node.setLayout({
|
x: nodeX
|
}, true) : node.setLayout({
|
y: nodeX
|
}, true);
|
y0 = nodeX;
|
for (var i = n - 2; i >= 0; --i) {
|
node = nodes[i];
|
dy = node.getLayout()[keyAttr] + node.getLayout()[nodeDyAttr] + nodeGap - y0;
|
if (dy > 0) {
|
nodeX = node.getLayout()[keyAttr] - dy;
|
orient === 'vertical' ? node.setLayout({
|
x: nodeX
|
}, true) : node.setLayout({
|
y: nodeX
|
}, true);
|
}
|
y0 = node.getLayout()[keyAttr];
|
}
|
}
|
});
|
}
|
/**
|
* Change the y-position of the nodes, except most the right side nodes
|
* @param nodesByBreadth
|
* @param alpha parameter used to adjust the nodes y-position
|
*/
|
function relaxRightToLeft(nodesByBreadth, alpha, orient) {
|
zrUtil.each(nodesByBreadth.slice().reverse(), function (nodes) {
|
zrUtil.each(nodes, function (node) {
|
if (node.outEdges.length) {
|
var y = sum(node.outEdges, weightedTarget, orient) / sum(node.outEdges, getEdgeValue);
|
if (isNaN(y)) {
|
var len = node.outEdges.length;
|
y = len ? sum(node.outEdges, centerTarget, orient) / len : 0;
|
}
|
if (orient === 'vertical') {
|
var nodeX = node.getLayout().x + (y - center(node, orient)) * alpha;
|
node.setLayout({
|
x: nodeX
|
}, true);
|
} else {
|
var nodeY = node.getLayout().y + (y - center(node, orient)) * alpha;
|
node.setLayout({
|
y: nodeY
|
}, true);
|
}
|
}
|
});
|
});
|
}
|
function weightedTarget(edge, orient) {
|
return center(edge.node2, orient) * edge.getValue();
|
}
|
function centerTarget(edge, orient) {
|
return center(edge.node2, orient);
|
}
|
function weightedSource(edge, orient) {
|
return center(edge.node1, orient) * edge.getValue();
|
}
|
function centerSource(edge, orient) {
|
return center(edge.node1, orient);
|
}
|
function center(node, orient) {
|
return orient === 'vertical' ? node.getLayout().x + node.getLayout().dx / 2 : node.getLayout().y + node.getLayout().dy / 2;
|
}
|
function getEdgeValue(edge) {
|
return edge.getValue();
|
}
|
function sum(array, cb, orient) {
|
var sum = 0;
|
var len = array.length;
|
var i = -1;
|
while (++i < len) {
|
var value = +cb(array[i], orient);
|
if (!isNaN(value)) {
|
sum += value;
|
}
|
}
|
return sum;
|
}
|
/**
|
* Change the y-position of the nodes, except most the left side nodes
|
*/
|
function relaxLeftToRight(nodesByBreadth, alpha, orient) {
|
zrUtil.each(nodesByBreadth, function (nodes) {
|
zrUtil.each(nodes, function (node) {
|
if (node.inEdges.length) {
|
var y = sum(node.inEdges, weightedSource, orient) / sum(node.inEdges, getEdgeValue);
|
if (isNaN(y)) {
|
var len = node.inEdges.length;
|
y = len ? sum(node.inEdges, centerSource, orient) / len : 0;
|
}
|
if (orient === 'vertical') {
|
var nodeX = node.getLayout().x + (y - center(node, orient)) * alpha;
|
node.setLayout({
|
x: nodeX
|
}, true);
|
} else {
|
var nodeY = node.getLayout().y + (y - center(node, orient)) * alpha;
|
node.setLayout({
|
y: nodeY
|
}, true);
|
}
|
}
|
});
|
});
|
}
|
/**
|
* Compute the depth(y-position) of each edge
|
*/
|
function computeEdgeDepths(nodes, orient) {
|
var keyAttr = orient === 'vertical' ? 'x' : 'y';
|
zrUtil.each(nodes, function (node) {
|
node.outEdges.sort(function (a, b) {
|
return a.node2.getLayout()[keyAttr] - b.node2.getLayout()[keyAttr];
|
});
|
node.inEdges.sort(function (a, b) {
|
return a.node1.getLayout()[keyAttr] - b.node1.getLayout()[keyAttr];
|
});
|
});
|
zrUtil.each(nodes, function (node) {
|
var sy = 0;
|
var ty = 0;
|
zrUtil.each(node.outEdges, function (edge) {
|
edge.setLayout({
|
sy: sy
|
}, true);
|
sy += edge.getLayout().dy;
|
});
|
zrUtil.each(node.inEdges, function (edge) {
|
edge.setLayout({
|
ty: ty
|
}, true);
|
ty += edge.getLayout().dy;
|
});
|
});
|
}
|
