/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */
#include "precompiled_sfx2.hxx"

#include "ContextMatcher.hxx"
#include "Context.hxx"

using ::rtl::OUString;

namespace sfx2 { namespace sidebar {

namespace {
    static const sal_Char* gsAny = "any";
}



ContextMatcher::ContextMatcher (void)
    : maEntries()
{
}




ContextMatcher::~ContextMatcher (void)
{
}




sal_Int32 ContextMatcher::EvaluateMatch (
    const Context& rContext) const
{
    sal_Int32 nBestMatch (Context::NoMatch);

    for (::std::vector<Entry>::const_iterator
             iEntry(maEntries.begin()),
             iEnd(maEntries.end());
         iEntry!=iEnd;
         ++iEntry)
    {
        const sal_Int32 nMatch (EvaluateMatch(rContext, *iEntry));
        if (nMatch < nBestMatch)
            nBestMatch = nMatch;
            if (nBestMatch == Context::OptimalMatch)
            break;
    }

    return nBestMatch;
}




sal_Int32 ContextMatcher::EvaluateMatch (
    const Context& rContext,
    const Entry& rEntry) const
{
    sal_Int32 nApplicationMatch (Context::NoMatch);
    if (rContext.msApplication.equals(rEntry.msApplicationName))
        nApplicationMatch = 0;
    else if (rEntry.msApplicationName.equalsAscii(gsAny))
        nApplicationMatch = Context::ApplicationWildcardMatch;
    else
        return Context::NoMatch;

    sal_Int32 nBestContextMatch (Context::NoMatch);
    for (::std::vector<OUString>::const_iterator
             iContext(rEntry.maContextNames.begin()),
             iEnd(rEntry.maContextNames.end());
         iContext!=iEnd;
         ++iContext)
    {
        sal_Int32 nContextMatch (Context::NoMatch);
        if (rContext.msContext.equals(*iContext))
            nContextMatch = 0;
        else if (iContext->equalsAscii(gsAny))
            nContextMatch = Context::ContextWildcardMatch;
        else
            continue;
        if (nContextMatch < nBestContextMatch)
            nBestContextMatch = nContextMatch;
    }

    if (rEntry.mbIsContextListNegated)
        nBestContextMatch = Context::NoMatch - nBestContextMatch;

    return nApplicationMatch + nBestContextMatch;
}




void ContextMatcher::AddMatcher (
    const ::rtl::OUString& rsApplicationName,
    const ::std::vector<rtl::OUString>& rContextNames,
    const bool bIsContextListNegated)
{
    maEntries.push_back(Entry());
    maEntries.back().msApplicationName = rsApplicationName;
    maEntries.back().maContextNames = rContextNames;
    maEntries.back().mbIsContextListNegated = bIsContextListNegated;
}




void ContextMatcher::AddMatcher (
    const ::rtl::OUString& rsApplicationName,
    const ::rtl::OUString& rsContextName)
{
    maEntries.push_back(Entry());
    maEntries.back().msApplicationName = rsApplicationName;
    maEntries.back().maContextNames.push_back(rsContextName);
    maEntries.back().mbIsContextListNegated = false;
}


} } // end of namespace sfx2::sidebar