/*
    Copyright 1991-2015 Amebis

    This file is part of libatl.

    Setup is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Setup 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 General Public License for more details.

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

#pragma once

#include <atlstr.h>
#include <Windows.h>


inline int GetWindowTextA(__in HWND hWnd, __out ATL::CAtlStringA &sValue)
{
    int iResult;

    // Query the final string length first.
    iResult = ::GetWindowTextLengthA(hWnd);
    if (iResult > 0) {
        // Prepare the buffer to format the string data into and read it.
        LPSTR szBuffer = sValue.GetBuffer(iResult++);
        if (!szBuffer) return 0;
        iResult = ::GetWindowTextA(hWnd, szBuffer, iResult);
        sValue.ReleaseBuffer(iResult);
        return iResult;
    } else {
        // The result is empty.
        sValue.Empty();
        return 0;
    }
}


inline int GetWindowTextW(__in HWND hWnd, __out ATL::CAtlStringW &sValue)
{
    int iResult;

    // Query the final string length first.
    iResult = ::GetWindowTextLengthW(hWnd);
    if (iResult > 0) {
        // Prepare the buffer to format the string data into and read it.
        LPWSTR szBuffer = sValue.GetBuffer(iResult++);
        if (!szBuffer) return 0;
        iResult = ::GetWindowTextW(hWnd, szBuffer, iResult);
        sValue.ReleaseBuffer(iResult);
        return iResult;
    } else {
        // The result is empty.
        sValue.Empty();
        return 0;
    }
}