/* -*- 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 "WinImplHelper.hxx"

#include <vector>
#include <osl/diagnose.h>
#include <rtl/ustrbuf.hxx>
#include <com/sun/star/uno/Sequence.hxx>

#ifdef _WIN32_WINNT_WINBLUE
#include <VersionHelpers.h>
#endif

using ::com::sun::star::lang::IllegalArgumentException;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::XInterface;
using ::com::sun::star::uno::Any;
using ::com::sun::star::uno::Sequence;

const OUString TILDE( "~" );
const sal_Unicode   TILDE_SIGN = L'~';
const OUString AMPERSAND( "&" );
const sal_Unicode   AMPERSAND_SIGN = L'&';

// OS NAME          Platform                    Major   Minor

// Windows NT 3.51  VER_PLATFORM_WIN32_NT       3       51
// Windows NT 4.0   VER_PLATFORM_WIN32_NT       4       0
// Windows 2000     VER_PLATFORM_WIN32_NT       5       0
// Windows XP       VER_PLATFORM_WIN32_NT       5       1
// Windows Vista    VER_PLATFORM_WIN32_NT       6       0
// Windows 7        VER_PLATFORM_WIN32_NT       6       1
// Windows 95       VER_PLATFORM_WIN32_WINDOWS  4       0
// Windows 98       VER_PLATFORM_WIN32_WINDOWS  4       10
// Windows ME       VER_PLATFORM_WIN32_WINDOWS  4       90


// determine if we are running under Vista or newer OS

bool SAL_CALL IsWindowsVistaOrNewer()
{
// the Win32 SDK 8.1 deprecates GetVersionEx()
#ifdef _WIN32_WINNT_WINBLUE
    return IsWindowsVistaOrGreater();
#else
    OSVERSIONINFO osvi;
    osvi.dwOSVersionInfoSize = sizeof(osvi);

    if(!GetVersionEx(&osvi))
        return false;

    bool bRet = (VER_PLATFORM_WIN32_NT == osvi.dwPlatformId) &&
                (osvi.dwMajorVersion >= 6);

    bRet = bRet &&
        (osvi.dwMinorVersion >=
         sal::static_int_cast< unsigned int >(0));

    return bRet;
#endif
}

void SAL_CALL ListboxAddString( HWND hwnd, const OUString& aString )
{
    LRESULT rc = SendMessageW(
        hwnd, CB_ADDSTRING, 0, reinterpret_cast< LPARAM >(aString.getStr( )) );
    (void) rc; // avoid warning
    OSL_ASSERT( (CB_ERR != rc) && (CB_ERRSPACE != rc) );
}

OUString SAL_CALL ListboxGetString( HWND hwnd, sal_Int32 aPosition )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    OUString aString;

    LRESULT lItem =
        SendMessageW( hwnd, CB_GETLBTEXTLEN, aPosition, 0 );

    if ( (CB_ERR != lItem) && (lItem > 0) )
    {
        // message returns the len of a combobox item
        // without trailing '\0' that's why += 1
        lItem++;

        std::vector<sal_Unicode> vec(lItem);

        LRESULT lRet =
            SendMessageW(
                hwnd, CB_GETLBTEXT, aPosition,
                reinterpret_cast<LPARAM>(&vec[0]));

        OSL_ASSERT( lRet != CB_ERR );

        if ( CB_ERR != lRet )
            aString = OUString(&vec[0], lRet);
    }

    return aString;
}

void SAL_CALL ListboxAddItem( HWND hwnd, const Any& aItem, const Reference< XInterface >& rXInterface, sal_Int16 aArgPos )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    if ( !aItem.hasValue( ) ||
         aItem.getValueType( ) != cppu::UnoType<OUString>::get() )
         throw IllegalArgumentException(
            "invalid value type or any has no value",
            rXInterface,
            aArgPos );

    OUString cbItem;
    aItem >>= cbItem;

    ListboxAddString( hwnd, cbItem );
}

void SAL_CALL ListboxAddItems( HWND hwnd, const Any& aItemList, const Reference< XInterface >& rXInterface, sal_Int16 aArgPos )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    if ( !aItemList.hasValue( ) ||
         aItemList.getValueType( ) != cppu::UnoType<Sequence<OUString>>::get() )
         throw IllegalArgumentException(
            "invalid value type or any has no value",
            rXInterface,
            aArgPos );

    Sequence< OUString > aStringList;
    aItemList >>= aStringList;

    sal_Int32 nItemCount = aStringList.getLength( );
    for( sal_Int32 i = 0; i < nItemCount; i++ )
    {
        ListboxAddString( hwnd, aStringList[i] );
    }
}

void SAL_CALL ListboxDeleteItem( HWND hwnd, const Any& aPosition, const Reference< XInterface >& rXInterface, sal_Int16 aArgPos )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    if ( !aPosition.hasValue( ) ||
         ( (aPosition.getValueType( ) != cppu::UnoType<sal_Int32>::get()) &&
           (aPosition.getValueType( ) != cppu::UnoType<sal_Int16>::get()) &&
           (aPosition.getValueType( ) != cppu::UnoType<sal_Int8>::get()) ) )
         throw IllegalArgumentException(
            "invalid value type or any has no value",
            rXInterface,
            aArgPos );

    sal_Int32 nPos;
    aPosition >>= nPos;

    LRESULT lRet = SendMessageW( hwnd, CB_DELETESTRING, nPos, 0 );

    // if the return value is CB_ERR the given
    // index was not correct
    if ( CB_ERR == lRet )
        throw IllegalArgumentException(
            "invalid item position",
            rXInterface,
            aArgPos );
}

void SAL_CALL ListboxDeleteItems( HWND hwnd, const Any&, const Reference< XInterface >&, sal_Int16 )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    LRESULT lRet = 0;

    do
    {
        // the return value on success is the number
        // of remaining elements in the listbox
        lRet = SendMessageW( hwnd, CB_DELETESTRING, 0, 0 );
    }
    while ( (lRet != CB_ERR) && (lRet > 0) );
}

void SAL_CALL ListboxSetSelectedItem( HWND hwnd, const Any& aPosition, const Reference< XInterface >& rXInterface, sal_Int16 aArgPos )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

     if ( !aPosition.hasValue( ) ||
         ( (aPosition.getValueType( ) != cppu::UnoType<sal_Int32>::get()) &&
           (aPosition.getValueType( ) != cppu::UnoType<sal_Int16>::get()) &&
           (aPosition.getValueType( ) != cppu::UnoType<sal_Int8>::get()) ) )
         throw IllegalArgumentException(
            "invalid value type or any has no value",
            rXInterface,
            aArgPos );

    sal_Int32 nPos;
    aPosition >>= nPos;

    if ( nPos < -1 )
        throw IllegalArgumentException(
            "invalid index",
            rXInterface,
            aArgPos );

    LRESULT lRet = SendMessageW( hwnd, CB_SETCURSEL, nPos, 0 );

    if ( (CB_ERR == lRet) && (-1 != nPos) )
        throw IllegalArgumentException(
            "invalid index",
            rXInterface,
            aArgPos );
}

Any SAL_CALL ListboxGetItems( HWND hwnd )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    LRESULT nItemCount = SendMessageW( hwnd, CB_GETCOUNT, 0, 0 );

    Sequence< OUString > aItemList;

    if ( CB_ERR != nItemCount )
    {
        aItemList.realloc( nItemCount );

        for ( LRESULT i = 0; i < nItemCount; i++ )
        {
            aItemList[i] = ListboxGetString( hwnd, i );
        }
    }

    return Any(aItemList);
}

Any SAL_CALL ListboxGetSelectedItem( HWND hwnd )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    LRESULT idxItem = SendMessageW( hwnd, CB_GETCURSEL, 0, 0 );

    return Any( ListboxGetString( hwnd, idxItem ) );
}

Any SAL_CALL ListboxGetSelectedItemIndex( HWND hwnd )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    LRESULT idxItem = SendMessageW( hwnd, CB_GETCURSEL, 0, 0 );

    return Any( static_cast< sal_Int32 >( idxItem ) );
}

Any SAL_CALL CheckboxGetState( HWND hwnd )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    LRESULT lChkState = SendMessageW( hwnd, BM_GETCHECK, 0, 0 );
    bool bChkState = (lChkState == BST_CHECKED);
    return Any(bChkState);
}

void SAL_CALL CheckboxSetState(
    HWND hwnd, const css::uno::Any& aState, const Reference< XInterface >& rXInterface, sal_Int16 aArgPos )
    throw( IllegalArgumentException )
{
    OSL_ASSERT( IsWindow( hwnd ) );

    if ( !aState.hasValue( ) ||
         aState.getValueType( ) != cppu::UnoType<sal_Bool>::get())
         throw IllegalArgumentException(
            "invalid value type or any has no value",
            rXInterface,
            aArgPos );

    bool bCheckState = *static_cast< const sal_Bool* >( aState.getValue( ) );
    WPARAM wParam = bCheckState ? BST_CHECKED : BST_UNCHECKED;
    SendMessageW( hwnd, BM_SETCHECK, wParam, 0 );
}

sal_uInt32 SAL_CALL wcslenex( const sal_Unicode* pStr )
{
    if ( !pStr )
        return 0;

    const sal_Unicode* pTemp = pStr;
    sal_uInt32 strLen = 0;
    while( *pTemp || *(pTemp + 1) )
    {
        pTemp++;
        strLen++;
    }

    return strLen;
}

void Replace( const OUString& aLabel, sal_Unicode OldChar, sal_Unicode NewChar, OUStringBuffer& aBuffer )
{
    OSL_ASSERT( aLabel.getLength( ) );
    OSL_ASSERT( aBuffer.getCapacity( ) >= (aLabel.getLength( )) );

    sal_Int32 i = 0;
    const sal_Unicode* pCurrent  = aLabel.getStr( );
    const sal_Unicode* pNext     = aLabel.getStr( ) + 1;
    const sal_Unicode* pEnd      = aLabel.getStr( ) + aLabel.getLength( );

    while( pCurrent < pEnd )
    {
        OSL_ASSERT( pNext <= pEnd );
        OSL_ASSERT( (i >= 0) && (i < aBuffer.getCapacity( )) );

        if ( OldChar == *pCurrent )
        {
            if ( OldChar == *pNext )
            {
                // two OldChars in line will
                // be replaced by one
                // e.g. ~~ -> ~
                aBuffer.insert( i, *pCurrent );

                // skip the next one
                pCurrent++;
                pNext++;
            }
            else
            {
                // one OldChar will be replace
                // by NexChar
                aBuffer.insert( i, NewChar );
            }
         }
         else if ( *pCurrent == NewChar )
         {
            // a NewChar will be replaced by
             // two NewChars
             // e.g. & -> &&
            aBuffer.insert( i++, *pCurrent );
            aBuffer.insert( i, *pCurrent );
         }
         else
         {
            aBuffer.insert( i, *pCurrent );
         }

         pCurrent++;
         pNext++;
         i++;
    }
}

// converts a soffice label to a windows label
// the following rules for character replacements
// will be done:
// '~'  -> '&'
// '~~' -> '~'
// '&'  -> '&&'

OUString SOfficeToWindowsLabel( const OUString& aSOLabel )
{
    OUString aWinLabel = aSOLabel;

    if ( (aWinLabel.indexOf( TILDE ) > -1) || (aWinLabel.indexOf( AMPERSAND ) > -1) )
    {
        sal_Int32 nStrLen = aWinLabel.getLength( );

        // in the worst case the new string is
        // doubled in length, maybe some waste
        // of memory but how long is a label
        // normally(?)
        OUStringBuffer aBuffer( nStrLen * 2 );

        Replace( aWinLabel, TILDE_SIGN, AMPERSAND_SIGN, aBuffer );

        aWinLabel = aBuffer.makeStringAndClear( );
    }

    return aWinLabel;
}

// converts a windows label to a soffice label
// the following rules for character replacements
// will be done:
// '&'  -> '~'
// '&&' -> '&'
// '~'  -> '~~'

OUString WindowsToSOfficeLabel( const OUString& aWinLabel )
{
    OUString aSOLabel = aWinLabel;

    if ( (aSOLabel.indexOf( TILDE ) > -1) || (aSOLabel.indexOf( AMPERSAND ) > -1) )
    {
        sal_Int32 nStrLen = aSOLabel.getLength( );

        // in the worst case the new string is
        // doubled in length, maybe some waste
        // of memory but how long is a label
        // normally(?)
        OUStringBuffer aBuffer( nStrLen * 2 );

        Replace( aSOLabel, AMPERSAND_SIGN, TILDE_SIGN, aBuffer );

        aSOLabel = aBuffer.makeStringAndClear( );
    }

    return aSOLabel;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
