333 lines
10 KiB
JavaScript
333 lines
10 KiB
JavaScript
/**
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* Copyright 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*
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*/
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'use strict';
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var _prodInvariant = require('./reactProdInvariant');
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var ReactCurrentOwner = require('./ReactCurrentOwner');
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var invariant = require('fbjs/lib/invariant');
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var warning = require('fbjs/lib/warning');
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function isNative(fn) {
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// Based on isNative() from Lodash
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var funcToString = Function.prototype.toString;
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var hasOwnProperty = Object.prototype.hasOwnProperty;
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var reIsNative = RegExp('^' + funcToString
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// Take an example native function source for comparison
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.call(hasOwnProperty)
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// Strip regex characters so we can use it for regex
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.replace(/[\\^$.*+?()[\]{}|]/g, '\\$&')
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// Remove hasOwnProperty from the template to make it generic
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.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$');
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try {
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var source = funcToString.call(fn);
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return reIsNative.test(source);
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} catch (err) {
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return false;
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}
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}
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var canUseCollections =
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// Array.from
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typeof Array.from === 'function' &&
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// Map
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typeof Map === 'function' && isNative(Map) &&
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// Map.prototype.keys
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Map.prototype != null && typeof Map.prototype.keys === 'function' && isNative(Map.prototype.keys) &&
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// Set
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typeof Set === 'function' && isNative(Set) &&
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// Set.prototype.keys
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Set.prototype != null && typeof Set.prototype.keys === 'function' && isNative(Set.prototype.keys);
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var setItem;
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var getItem;
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var removeItem;
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var getItemIDs;
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var addRoot;
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var removeRoot;
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var getRootIDs;
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if (canUseCollections) {
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var itemMap = new Map();
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var rootIDSet = new Set();
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setItem = function (id, item) {
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itemMap.set(id, item);
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};
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getItem = function (id) {
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return itemMap.get(id);
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};
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removeItem = function (id) {
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itemMap['delete'](id);
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};
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getItemIDs = function () {
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return Array.from(itemMap.keys());
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};
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addRoot = function (id) {
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rootIDSet.add(id);
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};
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removeRoot = function (id) {
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rootIDSet['delete'](id);
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};
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getRootIDs = function () {
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return Array.from(rootIDSet.keys());
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};
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} else {
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var itemByKey = {};
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var rootByKey = {};
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// Use non-numeric keys to prevent V8 performance issues:
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// https://github.com/facebook/react/pull/7232
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var getKeyFromID = function (id) {
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return '.' + id;
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};
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var getIDFromKey = function (key) {
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return parseInt(key.substr(1), 10);
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};
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setItem = function (id, item) {
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var key = getKeyFromID(id);
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itemByKey[key] = item;
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};
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getItem = function (id) {
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var key = getKeyFromID(id);
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return itemByKey[key];
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};
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removeItem = function (id) {
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var key = getKeyFromID(id);
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delete itemByKey[key];
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};
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getItemIDs = function () {
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return Object.keys(itemByKey).map(getIDFromKey);
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};
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addRoot = function (id) {
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var key = getKeyFromID(id);
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rootByKey[key] = true;
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};
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removeRoot = function (id) {
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var key = getKeyFromID(id);
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delete rootByKey[key];
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};
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getRootIDs = function () {
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return Object.keys(rootByKey).map(getIDFromKey);
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};
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}
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var unmountedIDs = [];
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function purgeDeep(id) {
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var item = getItem(id);
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if (item) {
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var childIDs = item.childIDs;
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removeItem(id);
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childIDs.forEach(purgeDeep);
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}
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}
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function describeComponentFrame(name, source, ownerName) {
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return '\n in ' + (name || 'Unknown') + (source ? ' (at ' + source.fileName.replace(/^.*[\\\/]/, '') + ':' + source.lineNumber + ')' : ownerName ? ' (created by ' + ownerName + ')' : '');
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}
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function getDisplayName(element) {
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if (element == null) {
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return '#empty';
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} else if (typeof element === 'string' || typeof element === 'number') {
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return '#text';
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} else if (typeof element.type === 'string') {
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return element.type;
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} else {
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return element.type.displayName || element.type.name || 'Unknown';
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}
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}
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function describeID(id) {
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var name = ReactComponentTreeHook.getDisplayName(id);
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var element = ReactComponentTreeHook.getElement(id);
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var ownerID = ReactComponentTreeHook.getOwnerID(id);
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var ownerName;
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if (ownerID) {
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ownerName = ReactComponentTreeHook.getDisplayName(ownerID);
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}
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process.env.NODE_ENV !== 'production' ? warning(element, 'ReactComponentTreeHook: Missing React element for debugID %s when ' + 'building stack', id) : void 0;
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return describeComponentFrame(name, element && element._source, ownerName);
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}
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var ReactComponentTreeHook = {
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onSetChildren: function (id, nextChildIDs) {
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var item = getItem(id);
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!item ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Item must have been set') : _prodInvariant('144') : void 0;
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item.childIDs = nextChildIDs;
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for (var i = 0; i < nextChildIDs.length; i++) {
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var nextChildID = nextChildIDs[i];
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var nextChild = getItem(nextChildID);
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!nextChild ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected hook events to fire for the child before its parent includes it in onSetChildren().') : _prodInvariant('140') : void 0;
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!(nextChild.childIDs != null || typeof nextChild.element !== 'object' || nextChild.element == null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected onSetChildren() to fire for a container child before its parent includes it in onSetChildren().') : _prodInvariant('141') : void 0;
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!nextChild.isMounted ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected onMountComponent() to fire for the child before its parent includes it in onSetChildren().') : _prodInvariant('71') : void 0;
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if (nextChild.parentID == null) {
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nextChild.parentID = id;
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// TODO: This shouldn't be necessary but mounting a new root during in
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// componentWillMount currently causes not-yet-mounted components to
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// be purged from our tree data so their parent id is missing.
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}
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!(nextChild.parentID === id) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected onBeforeMountComponent() parent and onSetChildren() to be consistent (%s has parents %s and %s).', nextChildID, nextChild.parentID, id) : _prodInvariant('142', nextChildID, nextChild.parentID, id) : void 0;
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}
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},
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onBeforeMountComponent: function (id, element, parentID) {
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var item = {
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element: element,
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parentID: parentID,
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text: null,
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childIDs: [],
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isMounted: false,
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updateCount: 0
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};
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setItem(id, item);
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},
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onBeforeUpdateComponent: function (id, element) {
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var item = getItem(id);
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if (!item || !item.isMounted) {
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// We may end up here as a result of setState() in componentWillUnmount().
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// In this case, ignore the element.
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return;
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}
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item.element = element;
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},
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onMountComponent: function (id) {
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var item = getItem(id);
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!item ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Item must have been set') : _prodInvariant('144') : void 0;
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item.isMounted = true;
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var isRoot = item.parentID === 0;
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if (isRoot) {
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addRoot(id);
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}
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},
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onUpdateComponent: function (id) {
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var item = getItem(id);
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if (!item || !item.isMounted) {
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// We may end up here as a result of setState() in componentWillUnmount().
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// In this case, ignore the element.
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return;
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}
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item.updateCount++;
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},
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onUnmountComponent: function (id) {
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var item = getItem(id);
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if (item) {
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// We need to check if it exists.
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// `item` might not exist if it is inside an error boundary, and a sibling
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// error boundary child threw while mounting. Then this instance never
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// got a chance to mount, but it still gets an unmounting event during
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// the error boundary cleanup.
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item.isMounted = false;
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var isRoot = item.parentID === 0;
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if (isRoot) {
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removeRoot(id);
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}
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}
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unmountedIDs.push(id);
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},
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purgeUnmountedComponents: function () {
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if (ReactComponentTreeHook._preventPurging) {
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// Should only be used for testing.
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return;
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}
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for (var i = 0; i < unmountedIDs.length; i++) {
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var id = unmountedIDs[i];
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purgeDeep(id);
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}
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unmountedIDs.length = 0;
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},
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isMounted: function (id) {
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var item = getItem(id);
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return item ? item.isMounted : false;
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},
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getCurrentStackAddendum: function (topElement) {
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var info = '';
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if (topElement) {
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var name = getDisplayName(topElement);
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var owner = topElement._owner;
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info += describeComponentFrame(name, topElement._source, owner && owner.getName());
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}
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var currentOwner = ReactCurrentOwner.current;
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var id = currentOwner && currentOwner._debugID;
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info += ReactComponentTreeHook.getStackAddendumByID(id);
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return info;
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},
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getStackAddendumByID: function (id) {
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var info = '';
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while (id) {
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info += describeID(id);
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id = ReactComponentTreeHook.getParentID(id);
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}
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return info;
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},
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getChildIDs: function (id) {
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var item = getItem(id);
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return item ? item.childIDs : [];
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},
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getDisplayName: function (id) {
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var element = ReactComponentTreeHook.getElement(id);
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if (!element) {
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return null;
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}
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return getDisplayName(element);
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},
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getElement: function (id) {
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var item = getItem(id);
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return item ? item.element : null;
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},
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getOwnerID: function (id) {
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var element = ReactComponentTreeHook.getElement(id);
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if (!element || !element._owner) {
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return null;
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}
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return element._owner._debugID;
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},
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getParentID: function (id) {
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var item = getItem(id);
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return item ? item.parentID : null;
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},
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getSource: function (id) {
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var item = getItem(id);
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var element = item ? item.element : null;
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var source = element != null ? element._source : null;
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return source;
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},
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getText: function (id) {
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var element = ReactComponentTreeHook.getElement(id);
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if (typeof element === 'string') {
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return element;
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} else if (typeof element === 'number') {
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return '' + element;
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} else {
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return null;
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}
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},
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getUpdateCount: function (id) {
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var item = getItem(id);
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return item ? item.updateCount : 0;
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},
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getRootIDs: getRootIDs,
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getRegisteredIDs: getItemIDs
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};
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module.exports = ReactComponentTreeHook; |