/**
 * @preserve Copyright (C) 2009 Google Inc.
 * Copyright (C) 2010 Kyo Nagashima <kyo@hail2u.net>
 *
 * 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.
 */


/**
 * @fileoverview
 * Registers a language handler for CSS.
 *
 *
 * To use, include prettify.js and this file in your HTML page.
 * Then put your code in an HTML tag like
 *      <pre class="prettyprint lang-css"></pre>
 *
 *
 * http://www.w3.org/TR/CSS21/grammar.html Section G2 defines the lexical
 * grammar.  This scheme does not recognize keywords containing escapes.
 *
 * @author mikesamuel@gmail.com
 * @author kyo@hail2u.net
 */

PR['registerLangHandler'](
    PR['createSimpleLexer'](
        [
            // The space production <s>
            [PR['PR_PLAIN'],
                /^[ \t\r\n\f]+/, null, ' \t\r\n\f']
        ],
        [
            // Quoted strings.  <string1> and <string2>
            [PR['PR_STRING'],
                /^\"(?:[^\n\r\f\\\"]|\\(?:\r\n?|\n|\f)|\\[\s\S])*\"/, null],
            [PR['PR_STRING'],
                /^\'(?:[^\n\r\f\\\']|\\(?:\r\n?|\n|\f)|\\[\s\S])*\'/, null],
            ['lang-css-str', /^url\(([^\)\"\']*)\)/i],
            [PR['PR_KEYWORD'],
                /^(?:url|rgba?|hsla?|local|\!important|@import|@page|@media|@charset|@font-face|inherit)(?=[^\-\w]|$)/i, null],
            // A property name -- an identifier followed by a colon.
            ['lang-css-kw', /^(-?(?:[_a-z]|(?:\\[0-9a-f]+ ?))(?:[_a-z0-9\-]|\\(?:\\[0-9a-f]+ ?))*)\s*:/i],
            // A C style block comment.  The <comment> production.
            [PR['PR_COMMENT'], /^\/\*[^*]*\*+(?:[^\/*][^*]*\*+)*\//],
            // Escaping text spans
            [PR['PR_COMMENT'], /^(?:<!--|-->)/],
            // A number possibly containing a suffix.
            [PR['PR_LITERAL'], /^(?:\d+|\d*\.\d+)(?:%|[a-z]+)?/i],
            // A hex color
            [PR['PR_LITERAL'], /^#(?:[0-9a-f]{3}){1,2}/i],
            // An identifier
            [PR['PR_PLAIN'],
                /^-?(?:[_a-z]|(?:\\[\da-f]+ ?))(?:[_a-z\d\-]|\\(?:\\[\da-f]+ ?))*/i],
            // A run of punctuation
            [PR['PR_PUNCTUATION'], /^[^\s\w\'\"]+/]
        ]
    ),
    ['css']
);
PR['registerLangHandler'](
    PR['createSimpleLexer'](
        [],
        [
            [PR['PR_KEYWORD'], /^-?(?:[_a-z]|(?:\\[\da-f]+ ?))(?:[_a-z\d\-]|\\(?:\\[\da-f]+ ?))*/i]
        ]
    ),
    ['css-kw']
);
PR['registerLangHandler'](
    PR['createSimpleLexer'](
        [],
        [
            [PR['PR_STRING'], /^[^\)\"\']+/]
        ]
    ),
    ['css-str']
);