OpenSaveDialogs.cpp

#include <windows.h>
#include <Commdlg.h>
#include <algorithm>
#include <string>
#include <vector>

using namespace std;

typedef basic_string<WCHAR> tstring;
tstring widen(string str)
{
    const size_t wchar_count = str.size()+1;
    vector<WCHAR> buf(wchar_count);
    return tstring{buf.data(),(size_t)MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,buf.data(),wchar_count)};
}

string shorten(tstring str)
{
    int nbytes = WideCharToMultiByte(CP_UTF8,0,str.c_str(),(int)str.length(),NULL,0,NULL,NULL);
    vector<char> buf((size_t)nbytes);
    return string{buf.data(),(size_t)WideCharToMultiByte(CP_UTF8,0,str.c_str(),(int)str.length(),buf.data(),nbytes,NULL,NULL)};
}

extern "C"
{
    char *get_open_filename(char *filter, char *fname)
    {
        OPENFILENAMEW ofn;
        WCHAR szFile[MAX_PATH];

        HWND SitehWnd;
        SitehWnd = GetAncestor(GetActiveWindow(), GA_ROOTOWNER);

        string str_filter = string(filter) + string("\0");
        replace(str_filter.begin(), str_filter.end(), '|', '\0');
        string str_fname = fname;

        LPCWSTR cwstr_filter = widen(str_filter).c_str();
        LPCWSTR cwstr_fname = widen(str_fname).c_str();
        wchar_t* wstr_fname = const_cast<wchar_t*>(cwstr_fname);

        ZeroMemory(&ofn, sizeof(ofn));
        ofn.lStructSize = sizeof(ofn);
        ofn.hwndOwner = SitehWnd;
        ofn.lpstrFile = wstr_fname;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = cwstr_filter;
        ofn.nFilterIndex = 1;
        ofn.lpstrTitle = NULL;
        ofn.lpstrInitialDir = NULL;
        ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_LONGNAMES;

        if (GetSaveFileNameW(&ofn) != 0)
        {
            static string result;
            result = shorten(ofn.lpstrFile);
            return (char *)result.c_str();
        }

        return (char *)"";
    }

    char *get_save_filename(char *filter, char *fname)
    {
        OPENFILENAMEW ofn;
        WCHAR szFile[MAX_PATH];

        HWND SitehWnd;
        SitehWnd = GetAncestor(GetActiveWindow(), GA_ROOTOWNER);

        string str_filter = string(filter) + string("\0");
        replace(str_filter.begin(), str_filter.end(), '|', '\0');
        string str_fname = fname;

        LPCWSTR cwstr_filter = widen(str_filter).c_str();
        LPCWSTR cwstr_fname = widen(str_fname).c_str();
        wchar_t* wstr_fname = const_cast<wchar_t*>(cwstr_fname);

        ZeroMemory(&ofn, sizeof(ofn));
        ofn.lStructSize = sizeof(ofn);
        ofn.hwndOwner = SitehWnd;
        ofn.lpstrFile = wstr_fname;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = cwstr_filter;
        ofn.nFilterIndex = 1;
        ofn.lpstrTitle = NULL;
        ofn.lpstrInitialDir = NULL;
        ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_LONGNAMES | OFN_OVERWRITEPROMPT;

        if (GetSaveFileNameW(&ofn) != 0)
        {
            static string result;
            result = shorten(ofn.lpstrFile);
            return (char *)result.c_str();
        }

        return (char *)"";
    }

    char *get_open_filename_ext(char *filter, char *fname, char *dir, char *title)
    {
        OPENFILENAMEW ofn;
        WCHAR szFile[MAX_PATH];

        HWND SitehWnd;
        SitehWnd = GetAncestor(GetActiveWindow(), GA_ROOTOWNER);

        string str_filter = string(filter) + string("\0");
        replace(str_filter.begin(), str_filter.end(), '|', '\0');
        string str_fname = fname;
        string str_dir = dir;
        string str_title = title;

        LPCWSTR cwstr_filter = widen(str_filter).c_str();
        LPCWSTR cwstr_fname = widen(str_fname).c_str();
        wchar_t* wstr_fname = const_cast<wchar_t*>(cwstr_fname);
        LPCWSTR cwstr_dir = widen(str_dir).c_str();
        LPCWSTR cwstr_title = widen(str_title).c_str();

        ZeroMemory(&ofn, sizeof(ofn));
        ofn.lStructSize = sizeof(ofn);
        ofn.hwndOwner = SitehWnd;
        ofn.lpstrFile = wstr_fname;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = cwstr_filter;
        ofn.nFilterIndex = 1;
        ofn.lpstrTitle = cwstr_title;
        ofn.lpstrInitialDir = cwstr_dir;
        ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_LONGNAMES;

        if (GetSaveFileNameW(&ofn) != 0)
        {
            static string result;
            result = shorten(ofn.lpstrFile);
            return (char *)result.c_str();
        }

        return (char *)"";
    }

    char *get_save_filename_ext(char *filter, char *fname, char *dir, char *title)
    {
        OPENFILENAMEW ofn;
        WCHAR szFile[MAX_PATH];

        HWND SitehWnd;
        SitehWnd = GetAncestor(GetActiveWindow(), GA_ROOTOWNER);

        string str_filter = string(filter) + string("\0");
        replace(str_filter.begin(), str_filter.end(), '|', '\0');
        string str_fname = fname;
        string str_dir = dir;
        string str_title = title;

        LPCWSTR cwstr_filter = widen(str_filter).c_str();
        LPCWSTR cwstr_fname = widen(str_fname).c_str();
        wchar_t* wstr_fname = const_cast<wchar_t*>(cwstr_fname);
        LPCWSTR cwstr_dir = widen(str_dir).c_str();
        LPCWSTR cwstr_title = widen(str_title).c_str();

        ZeroMemory(&ofn, sizeof(ofn));
        ofn.lStructSize = sizeof(ofn);
        ofn.hwndOwner = SitehWnd;
        ofn.lpstrFile = wstr_fname;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = cwstr_filter;
        ofn.nFilterIndex = 1;
        ofn.lpstrTitle = cwstr_title;
        ofn.lpstrInitialDir = cwstr_dir;
        ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_LONGNAMES | OFN_OVERWRITEPROMPT;

        if (GetSaveFileNameW(&ofn) != 0)
        {
            static string result;
            result = shorten(ofn.lpstrFile);
            return (char *)result.c_str();
        }

        return (char *)"";
    }
}