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"use strict";
var wp;
(wp ||= {}).undoManager = (() => {
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __commonJS = (cb, mod) => function __require() {
return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
};
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
// If the importer is in node compatibility mode or this is not an ESM
// file that has been converted to a CommonJS file using a Babel-
// compatible transform (i.e. "__esModule" has not been set), then set
// "default" to the CommonJS "module.exports" for node compatibility.
isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
// package-external:@wordpress/is-shallow-equal
var require_is_shallow_equal = __commonJS({
"package-external:@wordpress/is-shallow-equal"(exports, module) {
module.exports = window.wp.isShallowEqual;
}
});
// packages/undo-manager/build-module/index.mjs
var index_exports = {};
__export(index_exports, {
createUndoManager: () => createUndoManager
});
var import_is_shallow_equal = __toESM(require_is_shallow_equal(), 1);
function mergeHistoryChanges(changes1, changes2) {
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;
}
var addHistoryChangesIntoRecord = (record, changes) => {
const existingChangesIndex = record?.findIndex(
({ id: recordIdentifier }) => {
return typeof recordIdentifier === "string" ? recordIdentifier === changes.id : (0, import_is_shallow_equal.isShallowEqual)(recordIdentifier, changes.id);
}
);
const nextRecord = [...record];
if (existingChangesIndex !== -1) {
nextRecord[existingChangesIndex] = {
id: changes.id,
changes: mergeHistoryChanges(
nextRecord[existingChangesIndex].changes,
changes.changes
)
};
} else {
nextRecord.push(changes);
}
return nextRecord;
};
function createUndoManager() {
let history = [];
let stagedRecord = [];
let offset = 0;
const dropPendingRedos = () => {
history = history.slice(0, offset || void 0);
offset = 0;
};
const appendStagedRecordToLatestHistoryRecord = () => {
const index = history.length === 0 ? 0 : history.length - 1;
let latestRecord = history[index] ?? [];
stagedRecord.forEach((changes) => {
latestRecord = addHistoryChangesIntoRecord(latestRecord, changes);
});
stagedRecord = [];
history[index] = latestRecord;
};
const isRecordEmpty = (record) => {
const filteredRecord = record.filter(({ changes }) => {
return Object.values(changes).some(
({ from, to }) => typeof from !== "function" && typeof to !== "function" && !(0, import_is_shallow_equal.isShallowEqual)(from, to)
);
});
return !filteredRecord.length;
};
return {
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];
}
};
}
return __toCommonJS(index_exports);
})();