examples/DumpTree.lua

   1 require("lxcb")
   2
   3 local INDENT_PER_LEVEL=2
   4 local no_name = ""
   5
   6 local atom = {}
   7
   8 function internatom(this, name)
   9     this[name] = dpy:intern_atom_reply(dpy:intern_atom(false, string.len(name), name)).atom
  10     return this[name]
  11 end
  12
  13 setmetatable(atom, { __index = internatom })
  14
  15 function printf(...)
  16     io.output():write(string.format(...))
  17 end
  18
  19 function DumpTree(id, indent)
  20     -- Show the information for this window
  21     local mapped
  22
  23     local attrcookie = dpy:get_window_attributes(id)
  24     local geomcookie = dpy:get_geometry(id)
  25     local namecookie = dpy:get_property(false, id, atom.WM_NAME, dpy.GET_PROPERTY_TYPE.ANY, 0, 80)
  26     local treecookie = dpy:query_tree(id)
  27
  28     local xwa = dpy:get_window_attributes_reply(attrcookie)
  29     if (xwa) then
  30         mapped = (xwa.map_state == dpy.MAP_STATE.VIEWABLE)
  31     end
  32
  33     if (mapped) then
  34         printf("%s0x%08X ", string.rep(" ", indent), id);
  35     else
  36         printf("%s(0x%08X)", string.rep(" ", indent), id);
  37     end
  38
  39     local geom = dpy:get_geometry_reply(geomcookie)
  40     printf(" %d: %d,%d [%dx%d]", geom.depth, geom.x, geom.y, geom.width, geom.height)
  41
  42     local name = ''
  43     local prop = dpy:get_property_reply(namecookie)
  44     if (prop) then
  45         name = prop.value
  46     end
  47
  48     printf(" %s\n", name);
  49
  50     -- Recursively show the information for the rest of the tree
  51     local tree = dpy:query_tree_reply(treecookie)
  52     for k, v in ipairs(tree.children) do
  53         DumpTree(v, indent + INDENT_PER_LEVEL)
  54     end
  55 end
  56
  57
  58 local root
  59 dpy, screen = lxcb.connect("")
  60
  61 if (not dpy) then
  62     print("Error: Cannot open default display.")
  63     return 1;
  64 end
  65
  66 if (#arg >= 1) then
  67     root = tonumber(arg[1])
  68     if (not root) then
  69         print("Usage: DumpTree [starting window]")
  70         return 1;
  71     end
  72 else
  73     root = dpy:get_setup().roots[screen+1].root
  74 end
  75
  76 DumpTree(root, 0)
  77
  78 dpy = nil
  79
  80 return 0