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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <malloc.h>
#include <X11/Xlib.h>
#include <time.h>
typedef struct s_elock_win_item
{
Window win;
time_t create_time;
struct s_elock_win_item *next;
} t_elock_win_item;
typedef struct s_elock_win_list
{
Display *disp;
struct s_elock_win_item *first;
struct s_elock_win_item *last;
} t_elock_win_list;
t_elock_win_list list;
Display *elock_open_display ();
void elock_error (char *message);
void elock_echo (char *message);
t_elock_win_list *elock_init_list ();
static void elock_add_to_list (Window win);
static void elock_select_events (Window wind, Bool substructureOnly);
Display *elock_open_display ()
{
Display *disp;
printf ("> elock_open_display\n");
disp = XOpenDisplay (getenv ("DISPLAY"));
if (disp == NULL)
{
fprintf (stderr, "Can't open Display\n");
exit (1);
}
fprintf (stdout, "DISPLAY OPENED\n");
printf ("< elock_open_display\n");
return disp;
}
void elock_error (char *message)
{
fprintf (stderr, "%s\n", message);
exit (1);
}
void elock_echo (char *message)
{
fprintf (stdout, "%s\n", message);
return;
}
t_elock_win_list *elock_init_list ()
{
int loop;
t_elock_win_list list;
printf ("> elock_init_list\n");
list.disp = elock_open_display ();
list.first = 0;
list.last = 0;
for (loop = -1; ++loop < ScreenCount (list.disp);)
{
Window root = RootWindowOfScreen (ScreenOfDisplay (list.disp, loop));
elock_add_to_list (root);
elock_select_events (root, True);
}
t_elock_win_list *p_list = &list;
printf ("< elock_init_list\n");
return p_list;
}
static void elock_add_to_list (Window win)
{
t_elock_win_item *new_win_item = malloc (sizeof (t_elock_win_item));
printf ("> elock_add_to_list\n");
if (new_win_item == NULL)
elock_error ("MALLOC ERROR");
new_win_item->win = win;
new_win_item->create_time = time (0);
new_win_item->next = 0;
if (!list.first)
{
list.first = new_win_item;
}
if (list.last)
{
list.last->next = new_win_item;
}
printf ("< elock_add_to_list\n");
list.last = new_win_item;
}
static void elock_select_events (Window wind, Bool substructureOnly)
{
Window elock_root;
Window elock_parent;
Window *elock_child;
unsigned elock_nb_child = 0;
unsigned loop_count;
XWindowAttributes attribs;
printf ("> elock_select_events\n");
if (!XQueryTree (list.disp, wind, &elock_root, &elock_parent, &elock_child, &elock_nb_child))
{
elock_error ("XQueryTree ERROR");
}
if (elock_nb_child)
{
printf ("elock_nb_child EXIST\n");
XFree ((char *)elock_child);
}
if (substructureOnly)
{
printf ("substructureOnly EXIST\n");
XSelectInput (list.disp, wind, SubstructureNotifyMask);
}
else
{
printf ("substructureOnly DOESN'T EXIST\n");
if (elock_parent == None)
{
printf ("elock_parent == None\n");
attribs.all_event_masks = attribs.do_not_propagate_mask = KeyPressMask;
}
else if (!XGetWindowAttributes (list.disp, wind, &attribs))
{
elock_error ("XGetWindowAttributes ERROR");
}
XSelectInput (list.disp,
wind,
SubstructureNotifyMask |
((attribs.all_event_masks | attribs.do_not_propagate_mask) & KeyPressMask));
}
if (!XQueryTree (list.disp, wind, &elock_root, &elock_parent, &elock_child, &elock_nb_child))
{
elock_error ("XQueryTree ERROR");
}
for (loop_count = 0; loop_count < elock_nb_child; ++loop_count)
{
printf (">> for\n");
elock_select_events (elock_child[loop_count], substructureOnly);
}
if (elock_nb_child)
{
printf ("elock_nb_child EXIST\n");
XFree ((char *)elock_child);
}
printf ("< elock_select_events\n");
}
int main ()
{
elock_init_list ();
return 0;
}
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