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/*
 * Copyright (c) 2019-2024 Ronald Brill.
 *
 * 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.
 */
package org.htmlunit.cssparser.dom;

import java.io.IOException;

import org.htmlunit.cssparser.parser.CSSException;
import org.htmlunit.cssparser.parser.CSSOMParser;
import org.htmlunit.cssparser.util.ParserUtils;
import org.w3c.dom.DOMException;

/**
 * Implementation of CSSCharsetRule.
 *
 * @author Ronald Brill
 *
 */
public class CSSCharsetRuleImpl extends AbstractCSSRuleImpl {

    private String encoding_;

    /**
     * Ctor.
     *
     * @param parentStyleSheet the parent style sheet
     * @param parentRule the parent rule
     * @param encoding the encoding
     */
    public CSSCharsetRuleImpl(
            final CSSStyleSheetImpl parentStyleSheet,
            final AbstractCSSRuleImpl parentRule,
            final String encoding) {
        super(parentStyleSheet, parentRule);
        encoding_ = encoding;
    }

    /** {@inheritDoc} */
    @Override
    public void setCssText(final String cssText) throws DOMException {
        try {
            final CSSOMParser parser = new CSSOMParser();
            final AbstractCSSRuleImpl r = parser.parseRule(cssText);

            // The rule must be a charset rule
            if (r instanceof CSSCharsetRuleImpl) {
                encoding_ = ((CSSCharsetRuleImpl) r).encoding_;
            }
            else {
                throw new DOMExceptionImpl(
                    DOMException.INVALID_MODIFICATION_ERR,
                    DOMExceptionImpl.EXPECTING_CHARSET_RULE);
            }
        }
        catch (final CSSException e) {
            throw new DOMExceptionImpl(
                DOMException.SYNTAX_ERR,
                DOMExceptionImpl.SYNTAX_ERROR,
                e.getMessage());
        }
        catch (final IOException e) {
            throw new DOMExceptionImpl(
                DOMException.SYNTAX_ERR,
                DOMExceptionImpl.SYNTAX_ERROR,
                e.getMessage());
        }
    }

    /**
     * 

getEncoding.

* * @return the encoding */ public String getEncoding() { return encoding_; } /** {@inheritDoc} */ @Override public boolean equals(final Object obj) { if (this == obj) { return true; } if (!(obj instanceof CSSCharsetRuleImpl)) { return false; } final CSSCharsetRuleImpl ccr = (CSSCharsetRuleImpl) obj; return super.equals(obj) && ParserUtils.equals(getEncoding(), ccr.getEncoding()); } /** {@inheritDoc} */ @Override public int hashCode() { int hash = super.hashCode(); hash = ParserUtils.hashCode(hash, encoding_); return hash; } /** {@inheritDoc} */ @Override public String toString() { return getCssText(); } /** {@inheritDoc} */ @Override public String getCssText() { final StringBuilder sb = new StringBuilder(); sb.append("@charset \""); final String enc = getEncoding(); if (null != enc) { sb.append(enc); } sb.append("\";"); return sb.toString(); } }




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