140 lines
3.5 KiB
JavaScript
140 lines
3.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.find = find;
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exports.findParent = findParent;
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exports.getAncestry = getAncestry;
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exports.getDeepestCommonAncestorFrom = getDeepestCommonAncestorFrom;
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exports.getEarliestCommonAncestorFrom = getEarliestCommonAncestorFrom;
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exports.getFunctionParent = getFunctionParent;
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exports.getStatementParent = getStatementParent;
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exports.inType = inType;
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exports.isAncestor = isAncestor;
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exports.isDescendant = isDescendant;
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var _t = require("@babel/types");
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const {
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VISITOR_KEYS
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} = _t;
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function findParent(callback) {
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let path = this;
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while (path = path.parentPath) {
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if (callback(path)) return path;
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}
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return null;
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}
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function find(callback) {
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let path = this;
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do {
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if (callback(path)) return path;
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} while (path = path.parentPath);
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return null;
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}
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function getFunctionParent() {
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return this.findParent(p => p.isFunction());
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}
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function getStatementParent() {
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let path = this;
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do {
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if (!path.parentPath || Array.isArray(path.container) && path.isStatement()) {
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break;
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} else {
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path = path.parentPath;
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}
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} while (path);
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if (path && (path.isProgram() || path.isFile())) {
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throw new Error("File/Program node, we can't possibly find a statement parent to this");
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}
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return path;
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}
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function getEarliestCommonAncestorFrom(paths) {
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return this.getDeepestCommonAncestorFrom(paths, function (deepest, i, ancestries) {
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let earliest;
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const keys = VISITOR_KEYS[deepest.type];
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for (const ancestry of ancestries) {
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const path = ancestry[i + 1];
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if (!earliest) {
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earliest = path;
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continue;
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}
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if (path.listKey && earliest.listKey === path.listKey) {
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if (path.key < earliest.key) {
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earliest = path;
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continue;
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}
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}
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const earliestKeyIndex = keys.indexOf(earliest.parentKey);
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const currentKeyIndex = keys.indexOf(path.parentKey);
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if (earliestKeyIndex > currentKeyIndex) {
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earliest = path;
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}
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}
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return earliest;
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});
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}
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function getDeepestCommonAncestorFrom(paths, filter) {
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if (!paths.length) {
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return this;
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}
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if (paths.length === 1) {
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return paths[0];
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}
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let minDepth = Infinity;
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let lastCommonIndex, lastCommon;
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const ancestries = paths.map(path => {
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const ancestry = [];
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do {
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ancestry.unshift(path);
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} while ((path = path.parentPath) && path !== this);
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if (ancestry.length < minDepth) {
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minDepth = ancestry.length;
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}
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return ancestry;
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});
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const first = ancestries[0];
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depthLoop: for (let i = 0; i < minDepth; i++) {
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const shouldMatch = first[i];
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for (const ancestry of ancestries) {
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if (ancestry[i] !== shouldMatch) {
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break depthLoop;
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}
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}
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lastCommonIndex = i;
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lastCommon = shouldMatch;
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}
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if (lastCommon) {
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if (filter) {
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return filter(lastCommon, lastCommonIndex, ancestries);
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} else {
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return lastCommon;
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}
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} else {
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throw new Error("Couldn't find intersection");
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}
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}
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function getAncestry() {
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let path = this;
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const paths = [];
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do {
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paths.push(path);
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} while (path = path.parentPath);
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return paths;
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}
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function isAncestor(maybeDescendant) {
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return maybeDescendant.isDescendant(this);
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}
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function isDescendant(maybeAncestor) {
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return !!this.findParent(parent => parent === maybeAncestor);
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}
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function inType(...candidateTypes) {
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let path = this;
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while (path) {
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if (candidateTypes.includes(path.node.type)) return true;
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path = path.parentPath;
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}
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return false;
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}
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//# sourceMappingURL=ancestry.js.map
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