154 lines
4.6 KiB
JavaScript
154 lines
4.6 KiB
JavaScript
import * as d3 from 'd3';
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import { LINK_SELECTOR, NODE_SELECTOR, IS_HIGHLIGHTED } from './constants';
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export const highlightIn = 1;
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export const highlightOut = 0.2;
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const getCurrent = (idx, collection) => d3.select(collection[idx]);
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const getLiveLinks = () => d3.selectAll(`.${LINK_SELECTOR}.${IS_HIGHLIGHTED}`);
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const getOtherLinks = () => d3.selectAll(`.${LINK_SELECTOR}:not(.${IS_HIGHLIGHTED})`);
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const getNodesNotLive = () => d3.selectAll(`.${NODE_SELECTOR}:not(.${IS_HIGHLIGHTED})`);
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export const getLiveLinksAsDict = () => {
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return Object.fromEntries(
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getLiveLinks()
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.data()
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.map(d => [d.uid, d]),
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);
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};
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export const currentIsLive = (idx, collection) =>
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getCurrent(idx, collection).classed(IS_HIGHLIGHTED);
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const backgroundLinks = selection => selection.style('stroke-opacity', highlightOut);
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const backgroundNodes = selection => selection.attr('stroke', '#f2f2f2');
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const foregroundLinks = selection => selection.style('stroke-opacity', highlightIn);
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const foregroundNodes = selection => selection.attr('stroke', d => d.color);
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const renewLinks = (selection, baseOpacity) => selection.style('stroke-opacity', baseOpacity);
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const renewNodes = selection => selection.attr('stroke', d => d.color);
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export const getAllLinkAncestors = node => {
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if (node.targetLinks) {
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return node.targetLinks.flatMap(n => {
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return [n, ...getAllLinkAncestors(n.source)];
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});
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}
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return [];
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};
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const getAllNodeAncestors = node => {
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let allNodes = [];
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if (node.targetLinks) {
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allNodes = node.targetLinks.flatMap(n => {
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return getAllNodeAncestors(n.source);
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});
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}
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return [...allNodes, node.uid];
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};
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export const highlightLinks = (d, idx, collection) => {
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const currentLink = getCurrent(idx, collection);
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const currentSourceNode = d3.select(`#${d.source.uid}`);
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const currentTargetNode = d3.select(`#${d.target.uid}`);
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/* Higlight selected link, de-emphasize others */
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backgroundLinks(getOtherLinks());
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foregroundLinks(currentLink);
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/* Do the same to related nodes */
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backgroundNodes(getNodesNotLive());
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foregroundNodes(currentSourceNode);
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foregroundNodes(currentTargetNode);
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};
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const highlightPath = (parentLinks, parentNodes) => {
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/* de-emphasize everything else */
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backgroundLinks(getOtherLinks());
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backgroundNodes(getNodesNotLive());
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/* highlight correct links */
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parentLinks.forEach(({ uid }) => {
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foregroundLinks(d3.select(`#${uid}`)).classed(IS_HIGHLIGHTED, true);
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});
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/* highlight correct nodes */
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parentNodes.forEach(id => {
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foregroundNodes(d3.select(`#${id}`)).classed(IS_HIGHLIGHTED, true);
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});
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};
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const restoreNodes = () => {
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/*
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When paths are unclicked, they can take down nodes that
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are still in use for other paths. This checks the live paths and
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rehighlights their nodes.
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*/
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getLiveLinks().each(d => {
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foregroundNodes(d3.select(`#${d.source.uid}`)).classed(IS_HIGHLIGHTED, true);
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foregroundNodes(d3.select(`#${d.target.uid}`)).classed(IS_HIGHLIGHTED, true);
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});
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};
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const restorePath = (parentLinks, parentNodes, baseOpacity) => {
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parentLinks.forEach(({ uid }) => {
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renewLinks(d3.select(`#${uid}`), baseOpacity).classed(IS_HIGHLIGHTED, false);
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});
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parentNodes.forEach(id => {
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d3.select(`#${id}`).classed(IS_HIGHLIGHTED, false);
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});
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if (d3.selectAll(`.${IS_HIGHLIGHTED}`).empty()) {
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renewLinks(getOtherLinks(), baseOpacity);
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renewNodes(getNodesNotLive());
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return;
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}
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backgroundLinks(getOtherLinks());
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backgroundNodes(getNodesNotLive());
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restoreNodes();
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};
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export const restoreLinks = baseOpacity => {
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/*
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if there exist live links, reset to highlight out / pale
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otherwise, reset to base
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*/
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if (d3.selectAll(`.${IS_HIGHLIGHTED}`).empty()) {
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renewLinks(d3.selectAll(`.${LINK_SELECTOR}`), baseOpacity);
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renewNodes(d3.selectAll(`.${NODE_SELECTOR}`));
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return;
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}
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backgroundLinks(getOtherLinks());
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backgroundNodes(getNodesNotLive());
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};
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export const toggleLinkHighlight = (baseOpacity, d, idx, collection) => {
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if (currentIsLive(idx, collection)) {
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restorePath([d], [d.source.uid, d.target.uid], baseOpacity);
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restoreNodes();
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return;
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}
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highlightPath([d], [d.source.uid, d.target.uid]);
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};
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export const togglePathHighlights = (baseOpacity, d, idx, collection) => {
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const parentLinks = getAllLinkAncestors(d);
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const parentNodes = getAllNodeAncestors(d);
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const currentNode = getCurrent(idx, collection);
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/* if this node is already live, make it unlive and reset its path */
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if (currentIsLive(idx, collection)) {
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currentNode.classed(IS_HIGHLIGHTED, false);
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restorePath(parentLinks, parentNodes, baseOpacity);
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return;
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}
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highlightPath(parentLinks, parentNodes);
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};
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