46 lines
1.4 KiB
TypeScript
46 lines
1.4 KiB
TypeScript
/*
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* Copyright [2015] [wisemapping]
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*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
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* It is basically the Apache License, Version 2.0 (the "License") plus the
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* "powered by wisemapping" text requirement on every single page;
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the license at
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*
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* http://www.wisemapping.org/license
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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export const createDocument = (): Document => {
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var doc: Document | null = null;
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if (window.document.implementation?.createDocument) {
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doc = window.document.implementation.createDocument('', '', null);
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}
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if (!doc) {
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throw new Error('Document could not be initialized');
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}
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return doc;
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};
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export const $defined = (obj: any) => {
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return obj != undefined && obj != null;
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};
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export const $assert = (assert, message: string): void => {
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if (!$defined(assert) || !assert) {
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console.error(message);
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throw new Error(message);
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}
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};
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export const sign = (value: number): 1 | -1 => {
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return value >= 0 ? 1 : -1;
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};
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