control-freak-ide/misc/pocs/GoJS/extensionsTS/LocalStorageCommandHandler.js

var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "../release/go"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    /*
    *  Copyright (C) 1998-2017 by Northwoods Software Corporation. All Rights Reserved.
    */
    var go = require("../release/go");
    /**
        * @constructor
        * @extends CommandHandler
        * @class
        * This CommandHandler class uses localStorage as the repository for the clipboard,
        * rather than an in-memory global variable.
        * It requires that the {@link Diagram#model} be serializable and deserializable using {@link Model#toJson} and {@link Model.fromJson}.
        * <p>
        * The {@link #copyToClipboard} and {@link #pasteFromClipboard} functions fall back to using the standard definitions
        * if there are any errors calling <code>Storage.getItem</code> or <code>Storage.setItem</code>.
        * <p>
        * Typical usage:
        * <pre>
        *   $(go.Diagram, "myDiagramDiv",
        *     {
        *       commandHandler: $(LocalStorageCommandHandler),
        *       . . .
        *     }
        *   )
        * </pre>
        * or:
        * <pre>
        *    myDiagram.commandHandler = new LocalStorageCommandHandler();
        * </pre>
        */
    var LocalStorageCommandHandler = /** @class */ (function (_super) {
        __extends(LocalStorageCommandHandler, _super);
        function LocalStorageCommandHandler() {
            var _this = _super !== null && _super.apply(this, arguments) || this;
            _this.StorageKey = "go._clipboard";
            _this.FormatKey = "go._clipboardFormat";
            return _this;
        }
        /**
              * @override
              * @this {LocalStorageCommandHandler}
              * @param {Iterable.<Part>} coll a collection of {@link Part}s.
              */
        LocalStorageCommandHandler.prototype.copyToClipboard = function (coll) {
            try {
                if (coll === null) {
                    window.localStorage.setItem(this.StorageKey, "");
                    window.localStorage.setItem(this.FormatKey, "");
                }
                else {
                    var clipdiag = new go.Diagram(); // create a temporary Diagram
                    // copy from this diagram to the temporary diagram some properties that affects copying:
                    clipdiag.isTreePathToChildren = this.diagram.isTreePathToChildren;
                    clipdiag.toolManager.draggingTool.dragsLink = this.diagram.toolManager.draggingTool.dragsLink;
                    // create a model like this one but with no data
                    clipdiag.model = this.diagram.model.copy();
                    // copy the given Parts into this temporary Diagram
                    this.diagram.copyParts(coll, clipdiag, false);
                    window.localStorage.setItem(this.StorageKey, clipdiag.model.toJson());
                    window.localStorage.setItem(this.FormatKey, clipdiag.model.dataFormat);
                }
            }
            catch (ex) {
                // fallback implementation
                go.CommandHandler.prototype.copyToClipboard.call(this, coll);
            }
        };
        /**
            * @override
            * @this {LocalStorageCommandHandler}
            * @return {Set.<Part>} a collection of newly pasted {@link Part}s
            */
        LocalStorageCommandHandler.prototype.pasteFromClipboard = function () {
            var coll = new go.Set(go.Part);
            try {
                var clipstr = window.localStorage.getItem(this.StorageKey);
                var clipfrmt = window.localStorage.getItem(this.FormatKey);
                if (clipstr === null || clipstr === "" || clipfrmt !== this.diagram.model.dataFormat) {
                    return coll;
                }
                else {
                    var clipdiag = new go.Diagram(); // create a temporary Diagram
                    // recover the model from the clipboard rendering
                    clipdiag.model = go.Model.fromJson(clipstr);
                    // copy all the CLIPDIAG Parts into this Diagram
                    var allparts = new go.Set(go.Part);
                    allparts.addAll(clipdiag.parts).addAll(clipdiag.nodes).addAll(clipdiag.links);
                    var copymap = this.diagram.copyParts(allparts, this.diagram, false);
                    // return a Set of the copied Parts
                    return new go.Set(go.Part).addAll(copymap.iteratorValues);
                }
            }
            catch (ex) {
                // fallback implementation
                return go.CommandHandler.prototype.pasteFromClipboard.call(this);
            }
        };
        /**
            * @override
            * @this {LocalStorageCommandHandler}
            * @return {boolean}
            */
        LocalStorageCommandHandler.prototype.canPasteSelection = function () {
            var diagram = this.diagram;
            if (diagram.isReadOnly || diagram.isModelReadOnly)
                return false;
            if (!diagram.allowInsert || !diagram.allowClipboard)
                return false;
            try {
                var clipstr = window.localStorage.getItem(this.StorageKey);
                var clipfrmt = window.localStorage.getItem(this.FormatKey);
                if (clipstr === null || clipstr === "")
                    return false;
                if (clipfrmt !== diagram.model.dataFormat)
                    return false;
                return true;
            }
            catch (ex) {
                // fallback implementation
                return go.CommandHandler.prototype.canPasteSelection();
            }
        };
        return LocalStorageCommandHandler;
    }(go.CommandHandler));
    exports.LocalStorageCommandHandler = LocalStorageCommandHandler;
});