/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * 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 <svl/lngmisc.hxx>

#include <comphelper/string.hxx>

#include <rtl/ustrbuf.hxx>

#include <tools/debug.hxx>

namespace linguistic

{

    sal_Int32 GetNumControlChars(std::u16string_view rTxt)

    {

        sal_Int32 nCnt = 0;

        for(const auto ch : rTxt)

        {

            if(IsControlChar(ch))

                ++nCnt;

        }

        return nCnt;

    }

    bool RemoveHyphens(OUString &rTxt)

    {

        sal_Int32 n = rTxt.getLength();

        rTxt = rTxt.replaceAll(OUStringChar(SVT_SOFT_HYPHEN), "");

        rTxt = rTxt.replaceAll(OUStringChar(SVT_HARD_HYPHEN), "");

        return n != rTxt.getLength();

    }

    bool RemoveControlChars(OUString &rTxt)

    {

        sal_Int32 nSize = rTxt.getLength() - GetNumControlChars(rTxt);

        if(nSize == rTxt.getLength())

            return false;

        OUStringBuffer aBuf(nSize);

        aBuf.setLength(nSize);

        for (sal_Int32 i = 0, j = 0; i < rTxt.getLength() && j < nSize; ++i)

            if (!IsControlChar(rTxt[i]))

                aBuf[j++] = rTxt[i];

        rTxt = aBuf.makeStringAndClear();

        DBG_ASSERT(rTxt.getLength() == nSize, "GetNumControlChars returned a different number of control characters than were actually removed.");

        return true;

    }

    bool ReplaceControlChars(OUString &rTxt)

    {

        // non breaking field character

        static const char CH_TXTATR_INWORD = static_cast<char>(0x02);

        // the resulting string looks like this:

        // 1. non breaking field characters get removed

        // 2. remaining control characters will be replaced by ' '

        if (GetNumControlChars(rTxt) == 0)

            return false;

        sal_Int32 n = rTxt.getLength();

        OUStringBuffer aBuf(n);

        aBuf.setLength(n);

        sal_Int32 j = 0;

        for (sal_Int32 i = 0; i < n && j < n; ++i)

        {

            if (CH_TXTATR_INWORD == rTxt[i])

                continue;

            aBuf[j++] = IsControlChar(rTxt[i]) ? ' ' : rTxt[i];

        }

        aBuf.setLength(j);

        rTxt = aBuf.makeStringAndClear();

        return true;

    }

    OUString GetThesaurusReplaceText(const OUString &rText)

    {

        // The strings for synonyms returned by the thesaurus sometimes have some

        // explanation text put in between '(' and ')' or a trailing '*'.

        // These parts should not be put in the ReplaceEdit Text that may get

        // inserted into the document. Thus we strip them from the text.

        OUString aText(rText);

        sal_Int32 nPos = aText.indexOf('(');

        while (nPos >= 0)

        {

            sal_Int32 nEnd = aText.indexOf(')', nPos);

            if (nEnd >= 0)

            {

                OUStringBuffer aTextBuf(aText);

                aTextBuf.remove(nPos, nEnd - nPos + 1);

                aText = aTextBuf.makeStringAndClear();

            }

            else

                break;

            nPos = aText.indexOf('(');

        }

        nPos = aText.indexOf('*');

        if(nPos == 0)

            return OUString();

        else if(nPos > 0)

            aText = aText.copy(0, nPos);

        // remove any possible remaining ' ' that may confuse the thesaurus

        // when it gets called with the text

        return comphelper::string::strip(aText, ' ');

    }

} // namespace linguistic

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