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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2012
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include <X11/Xlib.h>
#include "arch.h"
#include "parse.h"
#include "os_calls.h"
#include "chansrv.h"
#include "log.h"
#include "clipboard.h"
#include "rail.h"
#include "xcommon.h"
/*
#undef LOG_LEVEL
#define LOG_LEVEL 11
*/
extern int g_clip_up; /* in clipboard.c */
extern int g_rail_up; /* in rail.c */
Display *g_display = 0;
int g_x_socket = 0;
tbus g_x_wait_obj = 0;
Screen *g_screen = 0;
int g_screen_num = 0;
Window g_root_window = 0;
Atom g_wm_delete_window_atom = 0;
Atom g_wm_protocols_atom = 0;
Atom g_utf8_string = 0;
Atom g_net_wm_name = 0;
Atom g_wm_state = 0;
static x_server_fatal_cb_type x_server_fatal_handler = 0;
/*****************************************************************************/
static int
xcommon_error_handler(Display *dis, XErrorEvent *xer)
{
char text[256];
XGetErrorText(dis, xer->error_code, text, 255);
LOGM((LOG_LEVEL_ERROR, "X error [%s](%d) opcodes %d/%d "
"resource 0x%lx", text, xer->error_code,
xer->request_code, xer->minor_code, xer->resourceid));
return 0;
}
/*****************************************************************************/
/* Allow the caller to be notified on X server failure
Specified callback can do any cleanup that needs to be done on exit,
like removing temporary files. This is the last function called.
Don't worry about memory leaks */
void
xcommon_set_x_server_fatal_handler(x_server_fatal_cb_type handler)
{
x_server_fatal_handler = handler;
}
/*****************************************************************************/
/* The X server had an internal error */
static int
xcommon_fatal_handler(Display *dis)
{
if (x_server_fatal_handler)
{
x_server_fatal_handler();
}
return 0;
}
/*****************************************************************************/
/* returns time in milliseconds
this is like g_time2 in os_calls, but not milliseconds since machine was
up, something else
this is a time value similar to what the xserver uses */
int
xcommon_get_local_time(void)
{
return g_time3();
}
/******************************************************************************/
/* this should be called first */
int
xcommon_init(void)
{
if (g_display != 0)
{
LOG(10, ("xcommon_init: xcommon_init already called"));
return 0;
}
g_display = XOpenDisplay(0);
if (g_display == 0)
{
LOGM((LOG_LEVEL_ERROR, "xcommon_init: error, XOpenDisplay failed"));
return 1;
}
LOG(0, ("xcommon_init: connected to display ok"));
/* setting the error handlers can cause problem when shutting down
chansrv on some xlibs */
XSetErrorHandler(xcommon_error_handler);
XSetIOErrorHandler(xcommon_fatal_handler);
g_x_socket = XConnectionNumber(g_display);
if (g_x_socket == 0)
{
LOGM((LOG_LEVEL_ERROR, "xcommon_init: XConnectionNumber failed"));
return 1;
}
g_x_wait_obj = g_create_wait_obj_from_socket(g_x_socket, 0);
g_screen_num = DefaultScreen(g_display);
g_screen = ScreenOfDisplay(g_display, g_screen_num);
g_root_window = RootWindowOfScreen(g_screen);
g_wm_delete_window_atom = XInternAtom(g_display, "WM_DELETE_WINDOW", 0);
g_wm_protocols_atom = XInternAtom(g_display, "WM_PROTOCOLS", 0);
g_utf8_string = XInternAtom(g_display, "UTF8_STRING", 0);
g_net_wm_name = XInternAtom(g_display, "_NET_WM_NAME", 0);
g_wm_state = XInternAtom(g_display, "WM_STATE", 0);
return 0;
}
/*****************************************************************************/
/* returns error
this is called to get any wait objects for the main loop
timeout can be nil */
int
xcommon_get_wait_objs(tbus *objs, int *count, int *timeout)
{
int lcount;
if (((!g_clip_up) && (!g_rail_up)) || (objs == 0) || (count == 0))
{
return 0;
}
lcount = *count;
objs[lcount] = g_x_wait_obj;
lcount++;
*count = lcount;
return 0;
}
/*****************************************************************************/
int
xcommon_check_wait_objs(void)
{
XEvent xevent;
int clip_rv;
int rail_rv;
if ((!g_clip_up) && (!g_rail_up))
{
return 0;
}
while (XPending(g_display) > 0)
{
g_memset(&xevent, 0, sizeof(xevent));
XNextEvent(g_display, &xevent);
clip_rv = clipboard_xevent(&xevent);
rail_rv = rail_xevent(&xevent);
if ((clip_rv == 1) && (rail_rv == 1))
{
LOG(10, ("xcommon_check_wait_objs unknown xevent type %d",
xevent.type));
}
}
return 0;
}
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