debug: let dbg() be the universal thing to debug.

Therefore, we can use it directly on client objects. In this case, we
get full details.

rc/errors.lua

@@ -1,6 +1,3 @@
-require("awesome")
-require("naughty")
-
 -- Handle runtime errors after startup
 do
     local in_error = false
@@ -15,68 +12,3 @@ do
         in_error = false
     end)
 end
-
-local colors = {
-  header = theme.fg_widget_clock,
-  count  = theme.fg_widget_label,
-  index  = theme.fg_widget_label,
-  name   = theme.fg_widget_value_important,
-}
-
-local function dbg_get(var, depth, indent)
-  local a = ""
-  local text = ""
-  local name = ""
-  local vtype = type(var)
-  local vstring = tostring(var)
-
-  if vtype == "table" or vtype == "userdata" then
-    if vtype == "userdata" then var = getmetatable(var) end
-    -- element count and longest key
-    local count = 0
-    local longest_key = 3
-    for k,v in pairs(var) do
-      count = count + 1
-      longest_key = math.max(#tostring(k), longest_key)
-    end
-    text = text .. vstring .. " <span color='"..colors.count.."'>#" .. count .. "</span>"
-    -- descend a table
-    if depth > 0 then
-      -- sort keys FIXME: messes up sorting number
-      local sorted = {}
-      for k, v in pairs(var) do table.insert(sorted, { k, v }) end
-      table.sort(sorted, function(a, b) return tostring(a[1]) < tostring(b[1]) end)
-      -- go through elements
-      for _, p in ipairs(sorted) do
-        local key = p[1]; local value = p[2]
-        -- don't descend _M
-        local d; if key ~= "_M" then d = depth - 1 else d = 0 end
-        -- get content and add to output
-        local content = dbg_get(value, d, indent + longest_key + 1)
-        text = text .. '\n' .. string.rep(" ", indent) ..
-               string.format("<span color='"..colors.index.."'>%-"..longest_key.."s</span> %s",
-                             tostring(key), content)
-      end
-    end
-  else
-    if vtype == "tag" or vtype == "client" then
-      name = " [<span color='"..colors.name.."'>" .. var.name:sub(1,10) .. "</span>]"
-    end
-    text = text .. vstring .. name or ""
-  end
-
-  return text
-end
-
-function dbg(...)
-   local num = table.maxn(arg)
-   local text = "<span color='"..colors.header.."'>dbg</span> <span color='"..colors.count.."'>#"..num.."</span>"
-   local depth = 2
-
-   for i = 1, num do
-      local desc = dbg_get(arg[i], depth, 3)
-      text = text .. string.format("\n<span color='"..colors.index.."'>%2d</span> %s", i, desc)
-   end
-
-   naughty.notify{ text = text, timeout = 0, hover_timeout = 0.05, screen = screen.count() }
-end