@theia/core/lib/common/selection-command-handler.js

"use strict";
// *****************************************************************************
// Copyright (C) 2019 TypeFox and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
// *****************************************************************************
Object.defineProperty(exports, "__esModule", { value: true });
exports.SelectionCommandHandler = void 0;
class SelectionCommandHandler {
    constructor(selectionService, toSelection, options) {
        this.selectionService = selectionService;
        this.toSelection = toSelection;
        this.options = options;
    }
    execute(...args) {
        const selection = this.getSelection(...args);
        return selection ? this.options.execute(selection, ...args) : undefined;
    }
    isVisible(...args) {
        const selection = this.getSelection(...args);
        return !!selection && (!this.options.isVisible || this.options.isVisible(selection, ...args));
    }
    isEnabled(...args) {
        const selection = this.getSelection(...args);
        return !!selection && (!this.options.isEnabled || this.options.isEnabled(selection, ...args));
    }
    isMulti() {
        return this.options && !!this.options.multi;
    }
    getSelection(...args) {
        const givenSelection = args.length && this.toSelection(args[0]);
        if (givenSelection) {
            return this.isMulti() ? [givenSelection] : givenSelection;
        }
        const globalSelection = this.getSingleSelection(this.selectionService.selection);
        if (this.isMulti()) {
            return this.getMultiSelection(globalSelection);
        }
        return this.getSingleSelection(globalSelection);
    }
    getSingleSelection(arg) {
        let selection = this.toSelection(arg);
        if (selection) {
            return selection;
        }
        if (Array.isArray(arg)) {
            for (const element of arg) {
                selection = this.toSelection(element);
                if (selection) {
                    return selection;
                }
            }
        }
        return undefined;
    }
    getMultiSelection(arg) {
        let selection = this.toSelection(arg);
        if (selection) {
            return [selection];
        }
        const result = [];
        if (Array.isArray(arg)) {
            for (const element of arg) {
                selection = this.toSelection(element);
                if (selection) {
                    result.push(selection);
                }
            }
        }
        return result.length ? result : undefined;
    }
}
exports.SelectionCommandHandler = SelectionCommandHandler;
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