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A CSS parser which implements SAC (the Simple API for CSS).
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/*
 * Copyright (C) 1999-2020 David Schweinsberg.
 *
 * 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 com.steadystate.css.sac;

import org.w3c.css.sac.CSSException;
import org.w3c.css.sac.DocumentHandler;
import org.w3c.css.sac.LexicalUnit;
import org.w3c.css.sac.Locator;
import org.w3c.css.sac.SACMediaList;
import org.w3c.css.sac.SelectorList;

/**
 * Extension of the DocumentHanlder interface.
 * This was added to support the locator parameter to
 * inform about the code position.
 */
public interface DocumentHandlerExt extends DocumentHandler {

    /**
     * Receive notification of a charset at-rule.
     *
     * @param characterEncoding the character encoding
     * @param locator the SAC locator
     * @throws CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void charset(String characterEncoding, Locator locator) throws CSSException;

    /**
     * Receive notification of a import statement in the style sheet.
     *
     * @param uri The URI of the imported style sheet.
     * @param media The intended destination media for style information.
     * @param defaultNamespaceURI The default namespace URI for the imported
     *  style sheet.
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void importStyle(String uri, SACMediaList media,
        String defaultNamespaceURI, Locator locator) throws CSSException;

    /**
     * Receive notification of an unknown rule t-rule not supported by this
     * parser.
     *
     * @param atRule The complete ignored at-rule.
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void ignorableAtRule(String atRule, Locator locator) throws CSSException;

    /**
     * Receive notification of the beginning of a font face statement.
     *
     * The Parser will invoke this method at the beginning of every font face
     * statement in the style sheet. there will be a corresponding endFontFace()
     * event for every startFontFace() event.
     *
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void startFontFace(Locator locator) throws CSSException;

    /**
     * Receive notification of the beginning of a page statement.
     *
     * The Parser will invoke this method at the beginning of every page
     * statement in the style sheet. there will be a corresponding endPage()
     * event for every startPage() event.
     *
     * @param name the name of the page (if any, null otherwise)
     * @param pseudoPage the pseudo page (if any, null otherwise)
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void startPage(String name, String pseudoPage, Locator locator) throws CSSException;

    /**
     * Receive notification of the beginning of a media statement.
     *
     * The Parser will invoke this method at the beginning of every media
     * statement in the style sheet. there will be a corresponding endMedia()
     * event for every startElement() event.
     *
     * @param media The intended destination media for style information.
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void startMedia(SACMediaList media, Locator locator) throws CSSException;

    /**
     * Receive notification of the beginning of a rule statement.
     *
     * @param selectors All intended selectors for all declarations.
     * @param locator the SAC locator
     * @exception CSSException Any CSS exception, possibly wrapping another
     *  exception.
     */
    void startSelector(SelectorList selectors, Locator locator) throws CSSException;

    /**
     * Receive notification of a declaration.
     *
     * @param name the name of the property.
     * @param value the value of the property. All whitespace are stripped.
     * @param important is this property important ?
     * @param locator the SAC locator
     */
    void property(String name, LexicalUnit value, boolean important, Locator locator);
}