@makakwastaken/ts-edifact
Version:
Edifact parser library
61 lines • 2.33 kB
JavaScript
/**
* @author Roman Vottner
* @copyright 2021 Roman Vottner
* @license Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { DomHandler } from 'htmlparser2';
/**
* Customization of the `DomHandler` class to allow for extending the behavior
* performed on processing text and "open tags by the dom handler.
*
* This implementation is necessary due to a version update of htmlparser2
* and/or domhandler which now manages elements passed to the `opentag` method
* by putting such on an `openTag` stack and removing these on processing
* `onclosetag` calls. By replacing the function calls as previously done
* DomHandler isn't able to manage this tag stack properly and thus invalid
* operations are attempted on `undefined` references.
*
* This implementation overrides `ontext` and `onopentag` methods of DomHandler
* and defines two replacement functions (`onText` and`onOpenTag`), which need
* to be implemented by the user class. These replacement functions are invoked
* after the parent methods got called.
*/
export class UNECEDomHandler extends DomHandler {
/**
* Do not use this method. Please use {@link onText} instead.
*
* This method just ensures that the parent method is executed before an
* overriden version of {@link onText}
*
* @internal
*/
ontext(data) {
super.ontext(data);
this.onText(data);
}
/**
* Do not use this method. Please use {@link onOpenTag} instead.
*
* This method just ensures that the parent method is executed before an
* overriden version of {@link onOpenTag}
*
* @internal
*/
onopentag(name, attribs) {
super.onopentag(name, attribs);
this.onOpenTag(name, attribs);
}
}
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