com.itextpdf.styledxmlparser.css.selector.item.CssPseudoClassEmptySelectorItem Maven / Gradle / Ivy

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Styled XML parser is used by iText modules to parse HTML and XML

There is a newer version: 9.0.0

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2024 Apryse Group NV
    Authors: Apryse Software.

    This program is offered under a commercial and under the AGPL license.
    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.

    AGPL licensing:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see .
 */
package com.itextpdf.styledxmlparser.css.selector.item;

import com.itextpdf.styledxmlparser.css.CommonCssConstants;
import com.itextpdf.styledxmlparser.node.ICustomElementNode;
import com.itextpdf.styledxmlparser.node.IDocumentNode;
import com.itextpdf.styledxmlparser.node.IElementNode;
import com.itextpdf.styledxmlparser.node.INode;
import com.itextpdf.styledxmlparser.node.ITextNode;

class CssPseudoClassEmptySelectorItem extends CssPseudoClassSelectorItem {
    private static final CssPseudoClassEmptySelectorItem instance = new CssPseudoClassEmptySelectorItem();

    private CssPseudoClassEmptySelectorItem() {
        super(CommonCssConstants.EMPTY);
    }

    public static CssPseudoClassEmptySelectorItem getInstance() {
        return instance;
    }

    @Override
    public boolean matches(INode node) {
        if (!(node instanceof IElementNode) || node instanceof ICustomElementNode || node instanceof IDocumentNode) {
            return false;
        }
        if (node.childNodes().isEmpty()) {
            return true;
        }
        for (INode childNode : node.childNodes()) {
            if (!(childNode instanceof ITextNode) || !((ITextNode) childNode).wholeText().isEmpty()) {
                return false;
            }
        }
        return true;
    }
}