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/*

 * Copyright (c) 2000 World Wide Web Consortium,

 * (Massachusetts Institute of Technology, Institut National de

 * Recherche en Informatique et en Automatique, Keio University). All

 * Rights Reserved. This program is distributed under the W3C's Software

 * Intellectual Property License. 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 W3C License http://www.w3.org/Consortium/Legal/ for more details.

 */

package org.w3c.dom.css;

import org.w3c.dom.DOMException;

import org.w3c.dom.stylesheets.StyleSheet;

/**

 *  The <code>CSSStyleSheet</code> interface is a concrete interface used to

 * represent a CSS style sheet i.e., a style sheet whose content type is

 * "text/css".

 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.

 * @since DOM Level 2

 */

public interface CSSStyleSheet extends StyleSheet {

    /**

     *  If this style sheet comes from an <code>@import</code> rule, the

     * <code>ownerRule</code> attribute will contain the

     * <code>CSSImportRule</code>. In that case, the <code>ownerNode</code>

     * attribute in the <code>StyleSheet</code> interface will be

     * <code>null</code>. If the style sheet comes from an element or a

     * processing instruction, the <code>ownerRule</code> attribute will be

     * <code>null</code> and the <code>ownerNode</code> attribute will

     * contain the <code>Node</code>.

     */

    public CSSRule getOwnerRule();

    /**

     *  The list of all CSS rules contained within the style sheet. This

     * includes both rule sets and at-rules.

     */

    public CSSRuleList getCssRules();

    /**

     *  Used to insert a new rule into the style sheet. The new rule now

     * becomes part of the cascade.

     * @param rule  The parsable text representing the rule. For rule sets

     *   this contains both the selector and the style declaration. For

     *   at-rules, this specifies both the at-identifier and the rule

     *   content.

     * @param index  The index within the style sheet's rule list of the rule

     *   before which to insert the specified rule. If the specified index

     *   is equal to the length of the style sheet's rule collection, the

     *   rule will be added to the end of the style sheet.

     * @return  The index within the style sheet's rule collection of the

     *   newly inserted rule.

     * @exception DOMException

     *   HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the

     *   specified index e.g. if an <code>@import</code> rule is inserted

     *   after a standard rule set or other at-rule.

     *   <br>INDEX_SIZE_ERR: Raised if the specified index is not a valid

     *   insertion point.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this style sheet is

     *   readonly.

     *   <br>SYNTAX_ERR: Raised if the specified rule has a syntax error and

     *   is unparsable.

     */

    public int insertRule(String rule,

                          int index)

                          throws DOMException;

    /**

     *  Used to delete a rule from the style sheet.

     * @param index  The index within the style sheet's rule list of the rule

     *   to remove.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified index does not correspond to

     *   a rule in the style sheet's rule list.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this style sheet is

     *   readonly.

     */

    public void deleteRule(int index)

                           throws DOMException;

}