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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
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/*
 * Copyright (c) 2002-2023 Gargoyle Software Inc.
 *
 * 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
 * https://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.
 */
package org.htmlunit.javascript.host.css;

import static org.htmlunit.BrowserVersionFeatures.CSS_CSSTEXT_IE_STYLE;
import static org.htmlunit.javascript.configuration.SupportedBrowser.CHROME;
import static org.htmlunit.javascript.configuration.SupportedBrowser.EDGE;
import static org.htmlunit.javascript.configuration.SupportedBrowser.FF;
import static org.htmlunit.javascript.configuration.SupportedBrowser.FF_ESR;

import org.htmlunit.cssparser.dom.CSSImportRuleImpl;
import org.htmlunit.cssparser.dom.MediaListImpl;

import org.htmlunit.css.CssMediaList;
import org.htmlunit.css.CssStyleSheet;
import org.htmlunit.javascript.configuration.JsxClass;
import org.htmlunit.javascript.configuration.JsxConstructor;
import org.htmlunit.javascript.configuration.JsxGetter;
import org.htmlunit.javascript.host.html.HTMLElement;

/**
 * A JavaScript object for {@code CSSImportRule}.
 *
 * @author Daniel Gredler
 * @author Ahmed Ashour
 * @author Ronald Brill
 */
@JsxClass
public class CSSImportRule extends CSSRule {

    private MediaList media_;
    private CSSStyleSheet importedStylesheet_;

    /**
     * Creates a new instance.
     */
    public CSSImportRule() {
    }

    /**
     * Creates an instance.
     */
    @JsxConstructor({CHROME, EDGE, FF, FF_ESR})
    @Override
    public void jsConstructor() {
        super.jsConstructor();
    }

    /**
     * Creates a new instance.
     * @param stylesheet the Stylesheet of this rule.
     * @param rule the wrapped rule
     */
    protected CSSImportRule(final CSSStyleSheet stylesheet, final CSSImportRuleImpl rule) {
        super(stylesheet, rule);
    }

    /**
     * Returns the URL of the imported style sheet.
     * @return the URL of the imported style sheet
     */
    @JsxGetter
    public String getHref() {
        return getImportRule().getHref();
    }

    /**
     * Returns the media types that the imported CSS style sheet applies to.
     * @return the media types that the imported CSS style sheet applies to
     */
    @JsxGetter
    public MediaList getMedia() {
        if (media_ == null) {
            final CSSStyleSheet parent = getParentStyleSheet();
            final MediaListImpl ml = getImportRule().getMedia();

            media_ = new MediaList(parent, new CssMediaList(ml));
        }
        return media_;
    }

    /**
     * Returns the style sheet referred to by this rule.
     * @return the style sheet referred to by this rule
     */
    @JsxGetter
    public CSSStyleSheet getStyleSheet() {
        if (importedStylesheet_ == null) {
            final CSSStyleSheet owningSheet = getParentStyleSheet();
            final HTMLElement ownerNode = owningSheet.getOwnerNode();
            final CssStyleSheet importedSheet = owningSheet.getCssStyleSheet().getImportedStyleSheet(getImportRule());
            importedStylesheet_ = new CSSStyleSheet(null, ownerNode.getWindow(), importedSheet);
        }
        return importedStylesheet_;
    }

    /**
     * Returns the wrapped rule, as an import rule.
     * @return the wrapped rule, as an import rule
     */
    private CSSImportRuleImpl getImportRule() {
        return (CSSImportRuleImpl) getRule();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getCssText() {
        String cssText = super.getCssText();
        if (getBrowserVersion().hasFeature(CSS_CSSTEXT_IE_STYLE)) {
            cssText = REPLACEMENT_IE.matcher(cssText).replaceFirst("url( $1 )");
        }
        return cssText;
    }
}