open.cpp

Go to the documentation of this file.

/*
   Copyright (C) 2013 - 2016 by Ignacio Riquelme Morelle <[email protected]>
   Part of the Battle for Wesnoth Project http://www.wesnoth.org/

   This program 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 2 of the License, or
   (at your option) any later version.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY.

   See the COPYING file for more details.
*/

#include "desktop/open.hpp"

#include "log.hpp"
#include "serialization/unicode.hpp"

#if defined(_X11) || defined(__APPLE__)

#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h> // fork(), exec family

#elif defined(_WIN32)

#ifndef UNICODE
#define UNICODE
#endif
#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <shellapi.h> // ShellExecute()

#endif

static lg::log_domain log_desktop("desktop");
#define ERR_DU LOG_STREAM(err, log_desktop)
#define LOG_DU LOG_STREAM(info, log_desktop)

namespace desktop {

bool open_object_is_supported()
{
#if defined(_X11) || defined(__APPLE__) || defined(_WIN32)
    return true;
#else
    return false;
#endif
}

bool open_object(const std::string& path_or_url)
{
    LOG_DU << "open_object(): requested object: " << path_or_url << '\n';

#if defined(_X11) || defined(__APPLE__)

#ifndef __APPLE__
    LOG_DU << "open_object(): on X11, will use xdg-open\n";
    const char launcher[] = "xdg-open";
#else
    LOG_DU << "open_object(): on OS X, will use open\n";
    const char launcher[] = "open";
#endif

    int child_status = 0;
    const pid_t child = fork();

    if(child == -1) {
        ERR_DU << "open_object(): fork() failed" << std::endl;
        return false;
    } else if(child == 0) {
        execlp(launcher, launcher, path_or_url.c_str(), nullptr);
        _exit(1); // This shouldn't happen.
    } else if(waitpid(child, &child_status, 0) == -1) {
        ERR_DU << "open_object(): waitpid() failed" << std::endl;
        return false;
    }

    if(child_status) {
//Those status check macros seem to trigger old style casts on some compiler versions
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
        if(WIFEXITED(child_status)) {
            ERR_DU << "open_object(): " << launcher << " returned "
                   << WEXITSTATUS(child_status) << '\n';
#pragma GCC diagnostic pop
        } else {
            ERR_DU << "open_object(): " << launcher << " failed" << std::endl;
        }

        return false;
    }

    return true;

#elif defined(_WIN32)

    LOG_DU << "open_object(): on Win32, will use ShellExecute()\n";

    std::wstring u16path = unicode_cast<std::wstring>(path_or_url);

    const ptrdiff_t res = reinterpret_cast<ptrdiff_t>(ShellExecute(nullptr, L"open", u16path.c_str(), nullptr, nullptr, SW_SHOW));
    if(res <= 32) {
        ERR_DU << "open_object(): ShellExecute() failed (" << res << ")" << std::endl;
        return false;
    }

    return true;

#else

    UNUSED(path_or_url); // silence gcc's -Wunused-parameter
    ERR_DU << "open_object(): unsupported platform" << std::endl;
    return false;

#endif
}

}