gambas-source-code/main/lib/gui/main.c

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/***************************************************************************
main.c
(c) 2000-2017 Benoît Minisini <g4mba5@gmail.com>
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, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
***************************************************************************/
#define __MAIN_C
#include "main.h"
enum { USE_NOTHING, USE_GB_QT4, USE_GB_QT5, USE_GB_GTK, USE_GB_GTK3 };
static char use_list[4][3] = {
{ USE_GB_QT5, USE_GB_GTK, USE_GB_GTK3 },
{ USE_GB_QT4, USE_GB_GTK3, USE_GB_GTK },
{ USE_GB_GTK3, USE_GB_QT4, USE_GB_QT5 },
{ USE_GB_GTK, USE_GB_QT5, USE_GB_QT4 },
};
GB_INTERFACE GB EXPORT;
// Prevents gbi3 from complaining
GB_DESC *GB_CLASSES[] EXPORT =
{
NULL
};
char *GB_INCLUDE EXPORT = "gb.qt4|gb.qt5|gb.gtk|gb.gtk3";
const char *get_name(int use)
{
switch (use)
{
case USE_GB_QT4: return "gb.qt4";
case USE_GB_QT5: return "gb.qt5";
case USE_GB_GTK3: return "gb.gtk3";
default: return "gb.gtk";
}
}
static bool can_use(int use)
{
static const char *ext[] = { "ext", "webkit", "opengl", NULL };
char test[32];
char *suffix;
const char **pext;
const char *name;
name = get_name(use);
if (!GB.Component.CanLoadLibrary(name))
return FALSE;
strcpy(test, name);
suffix = test + strlen(name);
*suffix++ = '.';
for (pext = ext; *pext; pext++)
{
strcpy(suffix, *pext);
if (GB.Component.Exist(test) && !GB.Component.CanLoadLibrary(test))
return FALSE;
}
return TRUE;
}
int EXPORT GB_INIT(void)
{
int use = USE_NOTHING;
int use_other = USE_NOTHING;
char *env;
const char *comp;
int i;
env = getenv("GB_GUI");
if (env)
{
if (strcmp(env, "gb.qt4") == 0)
use = USE_GB_QT4;
else if (strcmp(env, "gb.qt5") == 0)
use = USE_GB_QT5;
else if (strcmp(env, "gb.gtk") == 0)
use = USE_GB_GTK;
else if (strcmp(env, "gb.gtk3") == 0)
use = USE_GB_GTK3;
}
if (use == USE_NOTHING)
{
use = USE_GB_GTK;
env = getenv("KDE_FULL_SESSION");
if (env && !strcmp(env, "true"))
{
env = getenv("KDE_SESSION_VERSION");
if (env)
{
if (strcmp(env, "4") == 0)
use = USE_GB_QT4;
else if (strcmp(env, "5") == 0)
use = USE_GB_QT5;
}
}
}
if (!can_use(use))
{
use_other = USE_NOTHING;
for (i = 0; i <= 2; i++)
{
if (can_use(use_list[use - 1][i]))
{
use_other = use_list[use - 1][i];
break;
}
}
if (use_other)
{
fprintf(stderr, "gb.gui: warning: '%s' component not found, using '%s' instead\n", get_name(use), get_name(use_other));
use = use_other;
}
else
{
fprintf(stderr, "gb.gui: error: unable to find any GUI component\n");
exit(1);
}
}
comp = get_name(use);
if (GB.Component.Load(comp))
{
fprintf(stderr, "gb.gui: error: cannot load component '%s'\n", comp);
exit(1);
}
else
{
env = getenv("GB_GUI_DEBUG");
if (env && !strcmp(env, "0"))
fprintf(stderr, "gb.gui: loading '%s'\n", comp);
}
setenv("GB_GUI", comp, TRUE);
return 0;
}
void EXPORT GB_EXIT()
{
}