/**

 * (C) 1999-2003 Lars Knoll (knoll@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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 the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#include "config.h"

#include "FontFamilyValue.h"

#include "PlatformString.h"

#include "RegularExpression.h"

namespace WebCore {

static bool isValidCSSIdentifier(const String& string)

{

    unsigned length = string.length();

    if (!length)

        return false;

    const UChar* characters = string.characters();

    UChar c = characters[0];

    if (!(c == '_' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c >= 0x80))

        return false;

    for (unsigned i = 1; i < length; ++i) {

        c = characters[i];

        if (!(c == '_' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '-' || c >= 0x80))

            return false;

    }

    return true;

}

// Quotes the string if it needs quoting.

// We use single quotes because serialization code uses double quotes, and it's nice to

// avoid having to turn all the quote marks into " as we would have to.

static String quoteStringIfNeeded(const String& string)

{

    if (isValidCSSIdentifier(string))

        return string;

    // FIXME: Also need to transform control characters (00-1F) into \ sequences.

    // FIXME: This is inefficient -- should use a Vector<UChar> instead.

    String quotedString = string;

    quotedString.replace('\\', "\\\\");

    quotedString.replace('\'', "\\'");

    return "'" + quotedString + "'";

}

FontFamilyValue::FontFamilyValue(const DeprecatedString& string)

    : CSSPrimitiveValue(String(), CSS_STRING)

{

    static const RegularExpression parenReg(" \\(.*\\)$");

    static const RegularExpression braceReg(" \\[.*\\]$");

    parsedFontName = string;

    // a language tag is often added in braces at the end. Remove it.

    parsedFontName.replace(parenReg, "");

    // remove [Xft] qualifiers

    parsedFontName.replace(braceReg, "");

}

String FontFamilyValue::cssText() const

{

    return quoteStringIfNeeded(parsedFontName);

}

}