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 *
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 * 1.1 (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.mozilla.org/MPL/
 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Bespin.
 *
 * The Initial Developer of the Original Code is
 * Mozilla.
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 *
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 *   Bespin Team (bespin@mozilla.com)
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"define metadata";
({
    "description": "CSS syntax highlighter",
    "dependencies": {
        "standard_syntax": "0.0.0"
    },
    "environments": {
        "worker": true
    },
    "provides": [
        {
            "ep": "syntax",
            "name": "css",
            "pointer": "#CSSSyntax",
            "fileexts": [ "css", "less" ]
        }
    ]
});
"end";

var Promise = require('bespin:promise').Promise;
var StandardSyntax = require('standard_syntax').StandardSyntax;

var COMMENT_REGEXP = {
    regex:  /^\/\/.*/,
    tag:    'comment'
};

var createCommentState = function(jumpBackState) {
    return [
        {
            regex:  /^[^*\/]+/,
            tag:    'comment'
        },
        {
            regex:  /^\*\//,
            tag:    'comment',
            then:   jumpBackState
        },
        {
            regex:  /^[*\/]/,
            tag:    'comment'
        }
    ];
};

var states = {
    start: [
        {
            //style names
            regex:  /^([a-zA-Z-\s]*)(?:\:)/,
            tag:    'identifier',
            then:   'style'
        },
        {
            //tags
            regex:  /^([\w]+)(?![a-zA-Z0-9_:])([,|{]*?)(?!;)(?!(;|%))/,
            tag:    'keyword',
            then:   'header'
        },
        {
            //id
            regex:  /^#([a-zA-Z]*)(?=.*{*?)/,
            tag:    'keyword',
            then:   'header'
        },
        {
            //classes
            regex:  /^\.([a-zA-Z]*)(?=.*{*?)/,
            tag:    'keyword',
            then:   'header'
        },
            COMMENT_REGEXP,
        {
            regex:  /^\/\*/,
            tag:    'comment',
            then:   'comment'
        },
        {
            regex:  /^./,
            tag:    'plain'
        }
    ],

    header: [
        {
            regex:  /^[^{|\/\/|\/\*]*/,
            tag:    'keyword',
            then:   'start'
        },
            COMMENT_REGEXP,
        {
            regex:  /^\/\*/,
            tag:    'comment',
            then:   'comment_header'
        }
    ],

    style: [
        {
            regex:  /^[^;|}|\/\/|\/\*]+/,
            tag:    'plain'
        },
        {
            regex:  /^;|}/,
            tag:    'plain',
            then:   'start'
        },
            COMMENT_REGEXP,
        {
            regex:  /^\/\*/,
            tag:    'comment',
            then:   'comment_style'
        }
    ],

    comment:        createCommentState('start'),
    comment_header: createCommentState('header'),
    comment_style:  createCommentState('style')
};

exports.CSSSyntax = new StandardSyntax(states);
