xwindow.h File Reference

#include <X11/Xlib.h>

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Functions
G_BEGIN_DECLS void	window_set_services (void)
Window	get_application_window (const char *app_name)
void	window_activate (Window win)
Window	get_active_window (void)
char *	get_application_of_window (Window win)
gint	window_get_idle_time (void)
void	print_window_list ()

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Function Documentation

Window get_active_window

(

void

)

char* get_application_of_window

(

Window

win

)

Definition at line 218 of file xwindow.c.

References g_display, and LOGPRINTF.

{
    gchar *app_name = NULL;
    XClassHint hint;
    
    LOGPRINTF("entry: %d", (int) wnd);

    if (XGetClassHint(g_display, wnd, &hint))
    {
        LOGPRINTF("Window %s, %s", hint.res_name, hint.res_class);
        app_name = g_strdup(hint.res_name);
        if (hint.res_name) XFree(hint.res_name);
        if (hint.res_class) XFree(hint.res_class);
        return app_name;
    }
    
    return NULL;
}

Window get_application_window

(

const char *

app_name

)

Definition at line 101 of file xwindow.c.

References atom_client_list, data, g_display, LOGPRINTF, and WARNPRINTF.

Referenced by on_check_child_window(), and process_activate().

{
    LOGPRINTF("entry: %s", app_name);
    
    Atom type;
    int format;
    unsigned char *data = NULL;
    unsigned long n_items, bytes_after;
    int result;
    int i;

    g_return_val_if_fail(app_name != NULL, 0);
    
    // get list of available windows
    //
    result = XGetWindowProperty(g_display, RootWindow(g_display, DefaultScreen(g_display)), 
                                atom_client_list,
                                0, 10000L,
                                False, XA_WINDOW,
                                &type, &format, &n_items,
                                &bytes_after, (unsigned char **)&data);

    if (result != Success || data == NULL || n_items == 0)
    {
        if (data) XFree(data);
        WARNPRINTF("failed to get client list, %d (items=%ld)", result, n_items);
        return None;
    }

    // check backwards as new application is likely last in line
    for (i = n_items-1; i >= 0; i--)
    {
        XClassHint hint;
        Window wnd = ((Window*)data)[i];
        
        // get name of application of the window
        //
        if (XGetClassHint(g_display, wnd, &hint))
        {
            LOGPRINTF("Window [%d] %d, %s", i, (guint) wnd, hint.res_name);
            
            if (strcmp(hint.res_name, app_name) == 0)
            {
                // found our application
                if (data) XFree(data);
                return wnd;
            }
        }
    }
    
    if (data) XFree(data);
    return None;
}

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void print_window_list

(

)

Definition at line 261 of file xwindow.c.

References atom_client_list, data, g_display, and WARNPRINTF.

Referenced by testing_list_tasks().

{
    Atom type;
    int format;
    unsigned char *data = NULL;
    unsigned long n_items, bytes_after;
    int result;

    // get list of available windows
    //
    result = XGetWindowProperty(g_display, RootWindow(g_display, DefaultScreen(g_display)), 
                                atom_client_list,
                                0, 10000L,
                                False, XA_WINDOW,
                                &type, &format, &n_items,
                                &bytes_after, (unsigned char **)&data);

    if (result != Success || data == NULL || n_items == 0)
    {
        if (data) XFree(data);
        WARNPRINTF("failed to get client list, %d (items=%ld)", result, n_items);
        return;
    }

    printf("%s() WINDOWS (%lu)\n", __func__, n_items);
    
    unsigned int i;
    for (i = 0; i < n_items; i++)
    {
        XClassHint hint;
        Window wnd = ((Window*)data)[i];
        
        // get name of application of the window
        //
        if (XGetClassHint(g_display, wnd, &hint))
        {
            printf("  Window [%d] %d, %s\n", i, (guint) wnd, hint.res_name);
        }
    }
    if (data) XFree(data);
}

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void window_activate

(

Window

win

)

Definition at line 186 of file xwindow.c.

References atom_active_window, atom_wm_user_time, g_display, and LOGPRINTF.

Referenced by child_activate(), on_window_open_callback(), and process_activate().

{
    LOGPRINTF("entry");

    guint32 timestamp = gtk_get_current_event_time();

    // update user time for window
    XChangeProperty(g_display, win, atom_wm_user_time, XA_CARDINAL, 32, PropModeReplace, (guchar *) &timestamp, 1);
    
    XEvent ev;
    memset(&ev, 0, sizeof ev);
    ev.xclient.type = ClientMessage;
    ev.xclient.window = win;
    ev.xclient.message_type = atom_active_window;
    ev.xclient.format = 32;
    ev.xclient.data.l[0] = 1;
    ev.xclient.data.l[1] = 0;
    ev.xclient.data.l[2] = 0;
    ev.xclient.data.l[3] = 0;
    ev.xclient.data.l[4] = 0;
    
    // activate/raise window
    //
    XSendEvent(g_display,
               RootWindow(g_display, DefaultScreen(g_display)), 
               False,
               SubstructureRedirectMask, 
               &ev);
}

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gint window_get_idle_time

(

void

)

Definition at line 238 of file xwindow.c.

References g_display, and LOGPRINTF.

Referenced by on_idle_timeout().

{
    gint idle_time = -1;
    static XScreenSaverInfo *info;

    LOGPRINTF("entry");
    
    info = XScreenSaverAllocInfo();
    if (info != NULL)
    {
        XScreenSaverQueryInfo(g_display, RootWindow(g_display, DefaultScreen(g_display)), info);
        idle_time = (info->idle) / 1000;
        XFree(info);
    }
    return idle_time;
}

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G_BEGIN_DECLS void window_set_services

(

void

)

File Name : xwindow.h

Description: X11 Window System functions Copyright (C) 2008 iRex Technologies B.V. All rights reserved.

Definition at line 81 of file xwindow.c.

References atom_active_window, atom_client_list, atom_wm_user_time, g_display, LOGPRINTF, and on_x_error().

Referenced by main().

{
    // make Xlib thread safe
    XInitThreads();
    
    LOGPRINTF("XinitThreads returned");
    
    // install custom error handler to avoid X's default fatal errors
    XSetErrorHandler(on_x_error);
    
    // set display globally
    g_display = gdk_x11_get_default_xdisplay();

    // set atoms globally
    atom_client_list   = XInternAtom(g_display, "_NET_CLIENT_LIST", False);
    atom_active_window = XInternAtom(g_display, "_NET_ACTIVE_WINDOW", False);
    atom_wm_user_time  = XInternAtom(g_display, "_NET_WM_USER_TIME", False);
}

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