Revision cca258656cbb1b6038902dc1208a9cb4ae16e92f authored by PMazarovich on 25 February 2022, 08:49:40 UTC, committed by GitHub on 25 February 2022, 08:49:40 UTC
1 parent eac5b60
annotations-history.js
// Copyright (C) 2019-2020 Intel Corporation
//
// SPDX-License-Identifier: MIT
const MAX_HISTORY_LENGTH = 128;
class AnnotationHistory {
constructor() {
this.frozen = false;
this.clear();
}
freeze(frozen) {
this.frozen = frozen;
}
get() {
return {
undo: this._undo.map((undo) => [undo.action, undo.frame]),
redo: this._redo.map((redo) => [redo.action, redo.frame]),
};
}
do(action, undo, redo, clientIDs, frame) {
if (this.frozen) return;
const actionItem = {
clientIDs,
action,
undo,
redo,
frame,
};
this._undo = this._undo.slice(-MAX_HISTORY_LENGTH + 1);
this._undo.push(actionItem);
this._redo = [];
}
undo(count) {
const affectedObjects = [];
for (let i = 0; i < count; i++) {
const action = this._undo.pop();
if (action) {
action.undo();
this._redo.push(action);
affectedObjects.push(...action.clientIDs);
} else {
break;
}
}
return affectedObjects;
}
redo(count) {
const affectedObjects = [];
for (let i = 0; i < count; i++) {
const action = this._redo.pop();
if (action) {
action.redo();
this._undo.push(action);
affectedObjects.push(...action.clientIDs);
} else {
break;
}
}
return affectedObjects;
}
clear() {
this._undo = [];
this._redo = [];
}
}
module.exports = AnnotationHistory;
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