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/*
  This file is part of the Grantlee template system.

  Copyright (c) 2009,2010 Stephen Kelly <steveire@gmail.com>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either version
  2.1 of the Licence, 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef GRANTLEE_UTIL_P_H
#define GRANTLEE_UTIL_P_H

#include "context.h"
#include "grantlee_core_export.h"
#include "safestring.h"

#include <QtCore/QVariant>

/// @file util.h Utility functions used throughout %Grantlee.

namespace Grantlee
{

/**
  Returns whether the @p variant is evaluated to true.

  @see @ref truthiness
*/
GRANTLEE_CORE_EXPORT bool variantIsTrue( const QVariant &variant );

/**
  @deprecated Use MetaType::toVariantList instead.
  Converts the @p variant into a list.
*/
GRANTLEE_CORE_EXPORT QVariantList variantToList( const QVariant &variant );

/**
  Converts the @p input into its unescaped form.

  Double slashes are converted to single slashes, \\&quot is converted to &quot etc.
*/
GRANTLEE_CORE_EXPORT QString unescapeStringLiteral( const QString &input );

/**
  Marks the @p input as safe.
*/
GRANTLEE_CORE_EXPORT Grantlee::SafeString markSafe( const Grantlee::SafeString &input );

/**
  Marks the @p input as requiring escaping.
*/
GRANTLEE_CORE_EXPORT Grantlee::SafeString markForEscaping( const Grantlee::SafeString &input );

/**
  Retrieves and returns a SafeString from the @p input.
*/
GRANTLEE_CORE_EXPORT Grantlee::SafeString getSafeString( const QVariant &input );

/**
  Returns whether @p input contains a SafeString.
*/
GRANTLEE_CORE_EXPORT bool isSafeString( const QVariant &input );

/**
  Returns true if the type of @p input can be inserted into a rendered template directly.
  Not that lists, hashes and QObject*s can not be.
*/
GRANTLEE_CORE_EXPORT bool supportedOutputType( const QVariant &input );

/**
  Compares @p lhs and @p rhs for equality. SafeStrings are compared as raw QStrings. Their safeness is not part of the comparison.

  @see QVariant::operator==
*/
GRANTLEE_CORE_EXPORT bool equals( const QVariant &lhs, const QVariant &rhs );

#ifndef Q_QDOC
/**
  @internal
  Returns the @p list as a formatted string. This is for debugging purposes only.
*/
GRANTLEE_CORE_EXPORT Grantlee::SafeString toString( const QVariantList &list );
#endif

}

#endif