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The JWebSwing implementation for Source Code Prettify

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// Copyright (C) 2010 Google Inc.
//
// 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 Scala.
 *
 * Derived from http://lampsvn.epfl.ch/svn-repos/scala/scala-documentation/trunk/src/reference/SyntaxSummary.tex
 *
 * @author [email protected]
 */

PR['registerLangHandler'](
    PR['createSimpleLexer'](
        [
            // Whitespace
            [PR['PR_PLAIN'], /^[\t\n\r \xA0]+/, null, '\t\n\r \xA0'],
            // A double or single quoted string 
            // or a triple double-quoted multi-line string.
            [PR['PR_STRING'],
                /^(?:"(?:(?:""(?:""?(?!")|[^\\"]|\\.)*"{0,3})|(?:[^"\r\n\\]|\\.)*"?))/,
                null, '"'],
            [PR['PR_LITERAL'], /^`(?:[^\r\n\\`]|\\.)*`?/, null, '`'],
            [PR['PR_PUNCTUATION'], /^[!#%&()*+,\-:;<=>?@\[\\\]^{|}~]+/, null,
                '!#%&()*+,-:;<=>?@[\\]^{|}~']
        ],
        [
            // A symbol literal is a single quote followed by an identifier with no
            // single quote following
            // A character literal has single quotes on either side
            [PR['PR_STRING'], /^'(?:[^\r\n\\']|\\(?:'|[^\r\n']+))'/],
            [PR['PR_LITERAL'], /^'[a-zA-Z_$][\w$]*(?!['$\w])/],
            [PR['PR_KEYWORD'], /^(?:abstract|case|catch|class|def|do|else|extends|final|finally|for|forSome|if|implicit|import|lazy|match|new|object|override|package|private|protected|requires|return|sealed|super|throw|trait|try|type|val|var|while|with|yield)\b/],
            [PR['PR_LITERAL'], /^(?:true|false|null|this)\b/],
            [PR['PR_LITERAL'], /^(?:(?:0(?:[0-7]+|X[0-9A-F]+))L?|(?:(?:0|[1-9][0-9]*)(?:(?:\.[0-9]+)?(?:E[+\-]?[0-9]+)?F?|L?))|\\.[0-9]+(?:E[+\-]?[0-9]+)?F?)/i],
            // Treat upper camel case identifiers as types.
            [PR['PR_TYPE'], /^[$_]*[A-Z][_$A-Z0-9]*[a-z][\w$]*/],
            [PR['PR_PLAIN'], /^[$a-zA-Z_][\w$]*/],
            [PR['PR_COMMENT'], /^\/(?:\/.*|\*(?:\/|\**[^*/])*(?:\*+\/?)?)/],
            [PR['PR_PUNCTUATION'], /^(?:\.+|\/)/]
        ]),
    ['scala']);