first commit

wp-includes/js/dist/undo-manager.js

@@ -0,0 +1,157 @@
+"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);
+})();