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   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <locale.h>
   4 #include <X11/Xlib.h>
   5 #include <X11/Xutil.h>
   6 #include <X11/Xatom.h>
   7 
   8 Display *dpy;
   9 Window root;
  10 
  11 Atom net_wm_name;
  12 
  13 #define BUFSIZE 256
  14 char buf[BUFSIZE];
  15 
  16 #define MIN(a, b) ((a) < (b) ? (a) : (b))
  17 
  18 #define OPT_GEOM 1
  19 #define OPT_CLASS 2
  20 #define OPT_OVERRIDE_REDIRECT 4
  21 #define OPT_TRANSIENT_FOR 8
  22 #define OPT_MAP_STATE 16
  23 
  24 unsigned int opt = OPT_GEOM | OPT_CLASS |  OPT_OVERRIDE_REDIRECT | OPT_TRANSIENT_FOR | OPT_MAP_STATE;
  25 
  26 void get_window_title(Window w, char *title, int size)
  27 {
  28     XTextProperty prop;
  29 
  30     /* try to get _NET_WM_NAME */
  31     XGetTextProperty(dpy, w, &prop, net_wm_name);
  32     if (prop.nitems == 0) {
  33         /* fall back to WM_NAME */
  34         XGetWMName(dpy, w, &prop);
  35     }
  36 
  37     title[0] = '\0';
  38     if (prop.nitems > 0 && prop.value) {
  39         if (prop.encoding == XA_STRING) {
  40             strncpy(title, (char *)prop.value, MIN(BUFSIZE - 1, size - 1));
  41         } else {
  42             char **l = NULL;
  43             int count;
  44             XmbTextPropertyToTextList(dpy, &prop, &l, &count);
  45             if (count > 0 && *l)
  46                 strncpy(title, *l, MIN(BUFSIZE - 1, size - 1));
  47             XFreeStringList(l);
  48         }
  49         title[size - 1] = '\0';
  50     }
  51 }
  52 
  53 #define indent(l) for (i = 0; i < (l); ++i) putchar('\t')
  54 void traverse(Window w, unsigned int level, unsigned int max_level)
  55 {
  56     Window r, parent, *children;
  57     unsigned int nchildren, i;
  58     XWindowAttributes wa;
  59 
  60     if (max_level != 0 && level > max_level)
  61         return;
  62 
  63     get_window_title(w, buf, BUFSIZE);
  64     if (buf[0] == '\0')
  65         strcpy(buf, "<no title>");
  66     XGetWindowAttributes(dpy, w, &wa);
  67 
  68     if (level > 0)
  69         putchar('\n');
  70     indent(level);
  71     printf("0x%06x \"%s\"\n", w, buf);
  72     if (opt & OPT_GEOM) {
  73         indent(level + 1);
  74         printf("geometry: %dx%d+%d+%d\n", wa.width, wa.height, wa.x, wa.y);
  75     }
  76     if (opt & OPT_CLASS) {
  77         indent(level + 1);
  78         printf("class: %s\n", wa.class == InputOutput ? "InputOutput" : "InputOnly");
  79     }
  80     if (opt & OPT_OVERRIDE_REDIRECT) {
  81         if (wa.override_redirect) {
  82             indent(level + 1);
  83             puts("override_redirect");
  84         }
  85     }
  86     if (opt & OPT_TRANSIENT_FOR) {
  87         Window trans;
  88         XGetTransientForHint(dpy, w, &trans);
  89         if (trans != 0) {
  90             indent(level + 1);
  91             printf("WM_TRANSIENT_FOR: 0x%06x\n", trans);
  92         }
  93     }
  94     if (opt & OPT_MAP_STATE) {
  95         indent(level + 1);
  96         printf("state: ");
  97         switch (wa.map_state) {
  98         case IsUnmapped: puts("Unmapped"); break;
  99         case IsUnviewable: puts("Unviewable"); break;
 100         case IsViewable: puts("Viewable"); break;
 101         }
 102     }
 103 
 104     XQueryTree(dpy, w, &r, &parent, &children, &nchildren);
 105     if (nchildren > 0) {
 106         for (i = 0; i < nchildren; ++i)
 107             traverse(children[i], level + 1, max_level);
 108         XFree(children);
 109     }
 110 }
 111 
 112 int main(int argc, char **argv)
 113 {
 114     if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 115         fputs("warning: no locale support\n", stderr);
 116 
 117     dpy = XOpenDisplay(argc > 1 ? argv[1] : NULL);
 118     if (!dpy) {
 119         fputs("failed to open display\n", stderr);
 120         return 1;
 121     }
 122     net_wm_name = XInternAtom(dpy, "_NET_WM_NAME", False);
 123     root = RootWindow(dpy, DefaultScreen(dpy));
 124     traverse(root, 0, 0);
 125     XCloseDisplay(dpy);
 126     return 0;
 127 }