/******/ (() => { // webpackBootstrap
/******/ "use strict";
/******/ var __webpack_modules__ = ({

/***/ 923:
/***/ ((module) => {

module.exports = window["wp"]["isShallowEqual"];

/***/ })

/******/ });
/************************************************************************/
/******/ // The module cache
/******/ var __webpack_module_cache__ = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/ // Check if module is in cache
/******/ var cachedModule = __webpack_module_cache__[moduleId];
/******/ if (cachedModule !== undefined) {
/******/ return cachedModule.exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = __webpack_module_cache__[moduleId] = {
/******/ // no module.id needed
/******/ // no module.loaded needed
/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ __webpack_modules__[moduleId](module, module.exports, __webpack_require__);
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/************************************************************************/
/******/ /* webpack/runtime/compat get default export */
/******/ (() => {
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = (module) => {
/******/ var getter = module && module.__esModule ?
/******/ () => (module['default']) :
/******/ () => (module);
/******/ __webpack_require__.d(getter, { a: getter });
/******/ return getter;
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/define property getters */
/******/ (() => {
/******/ // define getter functions for harmony exports
/******/ __webpack_require__.d = (exports, definition) => {
/******/ for(var key in definition) {
/******/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
/******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ }
/******/ }
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/hasOwnProperty shorthand */
/******/ (() => {
/******/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
/******/ })();
/******/
/******/ /* webpack/runtime/make namespace object */
/******/ (() => {
/******/ // define __esModule on exports
/******/ __webpack_require__.r = (exports) => {
/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/ })();
/******/
/************************************************************************/
var __webpack_exports__ = {};
// This entry need to be wrapped in an IIFE because it need to be isolated against other modules in the chunk.
(() => {
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */ createUndoManager: () => (/* binding */ createUndoManager)
/* harmony export */ });
/* harmony import */ var _wordpress_is_shallow_equal__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(923);
/* harmony import */ var _wordpress_is_shallow_equal__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_wordpress_is_shallow_equal__WEBPACK_IMPORTED_MODULE_0__);
/**
* WordPress dependencies
*/


/** @typedef {import('./types').HistoryRecord} HistoryRecord */
/** @typedef {import('./types').HistoryChange} HistoryChange */
/** @typedef {import('./types').HistoryChanges} HistoryChanges */
/** @typedef {import('./types').UndoManager} UndoManager */

/**
* Merge changes for a single item into a record of changes.
*
* @param {Record< string, HistoryChange >} changes1 Previous changes
* @param {Record< string, HistoryChange >} changes2 NextChanges
*
* @return {Record< string, HistoryChange >} Merged changes
*/
function mergeHistoryChanges(changes1, changes2) {
/**
* @type {Record< string, HistoryChange >}
*/
const newChanges = {
...changes1
};
Object.entries(changes2).forEach(([key, value]) => {
if (newChanges[key]) {
newChanges[key] = {
...newChanges[key],
to: value.to
};
} else {
newChanges[key] = value;
}
});
return newChanges;
}

/**
* Adds history changes for a single item into a record of changes.
*
* @param {HistoryRecord} record The record to merge into.
* @param {HistoryChanges} changes The changes to merge.
*/
const addHistoryChangesIntoRecord = (record, changes) => {
const existingChangesIndex = record?.findIndex(({
id: recordIdentifier
}) => {
return typeof recordIdentifier === 'string' ? recordIdentifier === changes.id : _wordpress_is_shallow_equal__WEBPACK_IMPORTED_MODULE_0___default()(recordIdentifier, changes.id);
});
const nextRecord = [...record];
if (existingChangesIndex !== -1) {
// If the edit is already in the stack leave the initial "from" value.
nextRecord[existingChangesIndex] = {
id: changes.id,
changes: mergeHistoryChanges(nextRecord[existingChangesIndex].changes, changes.changes)
};
} else {
nextRecord.push(changes);
}
return nextRecord;
};

/**
* Creates an undo manager.
*
* @return {UndoManager} Undo manager.
*/
function createUndoManager() {
/**
* @type {HistoryRecord[]}
*/
let history = [];
/**
* @type {HistoryRecord}
*/
let stagedRecord = [];
/**
* @type {number}
*/
let offset = 0;
const dropPendingRedos = () => {
history = history.slice(0, offset || undefined);
offset = 0;
};
const appendStagedRecordToLatestHistoryRecord = () => {
var _history$index;
const index = history.length === 0 ? 0 : history.length - 1;
let latestRecord = (_history$index = history[index]) !== null && _history$index !== void 0 ? _history$index : [];
stagedRecord.forEach(changes => {
latestRecord = addHistoryChangesIntoRecord(latestRecord, changes);
});
stagedRecord = [];
history[index] = latestRecord;
};

/**
* Checks whether a record is empty.
* A record is considered empty if it the changes keep the same values.
* Also updates to function values are ignored.
*
* @param {HistoryRecord} record
* @return {boolean} Whether the record is empty.
*/
const isRecordEmpty = record => {
const filteredRecord = record.filter(({
changes
}) => {
return Object.values(changes).some(({
from,
to
}) => typeof from !== 'function' && typeof to !== 'function' && !_wordpress_is_shallow_equal__WEBPACK_IMPORTED_MODULE_0___default()(from, to));
});
return !filteredRecord.length;
};
return {
/**
* Record changes into the history.
*
* @param {HistoryRecord=} record A record of changes to record.
* @param {boolean} isStaged Whether to immediately create an undo point or not.
*/
addRecord(record, isStaged = false) {
const isEmpty = !record || isRecordEmpty(record);
if (isStaged) {
if (isEmpty) {
return;
}
record.forEach(changes => {
stagedRecord = addHistoryChangesIntoRecord(stagedRecord, changes);
});
} else {
dropPendingRedos();
if (stagedRecord.length) {
appendStagedRecordToLatestHistoryRecord();
}
if (isEmpty) {
return;
}
history.push(record);
}
},
undo() {
if (stagedRecord.length) {
dropPendingRedos();
appendStagedRecordToLatestHistoryRecord();
}
const undoRecord = history[history.length - 1 + offset];
if (!undoRecord) {
return;
}
offset -= 1;
return undoRecord;
},
redo() {
const redoRecord = history[history.length + offset];
if (!redoRecord) {
return;
}
offset += 1;
return redoRecord;
},
hasUndo() {
return !!history[history.length - 1 + offset];
},
hasRedo() {
return !!history[history.length + offset];
}
};
}

})();

(window.wp = window.wp || {}).undoManager = __webpack_exports__;
/******/ })()
;