Fix bugs with v4 API update

layout/cascade.lua

@@ -8,7 +8,7 @@
                                                   
 --]]
 
-local tag      = require("awful.tag")
+local scr      = require("awful.screen")
 local tonumber = tonumber
 
 local cascade = {
@@ -31,6 +31,9 @@ local function do_cascade(p, tiling)
     -- Screen.
     local wa  = p.workarea
     local cls = p.clients
+    local ta = scr.focused().selected_tag
+
+    if not ta then return end
 
     if #cls <= 0 then return end
 
@@ -44,7 +47,7 @@ local function do_cascade(p, tiling)
         if cascade.nmaster > 0 then
             num_c = cascade.nmaster
         else
-            num_c = tag.master_count
+            num_c = ta.master_count
         end
 
         -- Opening a new window will usually force all existing windows to
@@ -89,7 +92,7 @@ local function do_cascade(p, tiling)
         if cascade.tile.mwfact > 0 then
             mwfact = cascade.tile.mwfact
         else
-            mwfact = tag.getmwfact(t)
+            mwfact = ta.master_width_factor
         end
 
         -- Make slave windows overlap main window? Do this if ncol is 1.
@@ -97,7 +100,7 @@ local function do_cascade(p, tiling)
         if cascade.tile.ncol > 0 then
             overlap_main = cascade.tile.ncol
         else
-            overlap_main = tag.column_count
+            overlap_main = ta.column_count
         end
 
         -- Minimum space for slave windows? See cascade.tile.lua.
@@ -105,7 +108,7 @@ local function do_cascade(p, tiling)
         if cascade.tile.nmaster > 0 then
             num_c = cascade.tile.nmaster
         else
-            num_c = tag.master_count
+            num_c = ta.master_count
         end
 
         local how_many = (#cls - 1 >= num_c and (#cls - 1)) or num_c

layout/centerwork.lua

@@ -10,9 +10,9 @@
                                                   
 --]]
 
-local tag      = require("awful.tag")
 local tonumber = tonumber
 local math     = { floor = math.floor }
+local scr      = require("awful.screen")
 
 local centerwork = {
     name         = "centerwork",
@@ -23,6 +23,9 @@ local function do_centerwork(p, orientation)
     -- Screen.
     local wa  = p.workarea
     local cls = p.clients
+    local ta = scr.focused().selected_tag
+
+    if not ta then return end
 
     if #cls <= 0 then return end
 
@@ -33,7 +36,7 @@ local function do_centerwork(p, orientation)
     local g = {}
 
     -- Main column, fixed width and height.
-    local mwfact          = tag.object.get_master_width_factor(t)
+    local mwfact          = ta.master_width_factor
     local mainhei         = math.floor(wa.height * mwfact)
     local mainwid         = math.floor(wa.width * mwfact)
     local slavewid        = wa.width - mainwid

layout/termfair.lua

@@ -9,7 +9,7 @@
                                                   
 --]]
 
-local tag      = require("awful.tag")
+local scr      = require("awful.screen")
 local math     = { ceil  = math.ceil,
                    floor = math.floor,
                    max   = math.max }
@@ -22,6 +22,9 @@ local function do_fair(p, orientation)
     -- Screen.
     local wa  = p.workarea
     local cls = p.clients
+    local ta = scr.focused().selected_tag
+
+    if not ta then return end
 
     if #cls <= 0 then return end
 
@@ -50,12 +53,12 @@ local function do_fair(p, orientation)
         if #cls <= 0 then return end
 
         -- How many vertical columns? Read from nmaster on the tag.
-        local num_x = tonumber(termfair.nmaster) or tag.master_count
-        local ncol  = tonumber(termfair.ncol) or tag.column_count
-        local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
+        local num_x = tonumber(termfair.nmaster) or ta.master_count
+        local ncol  = tonumber(termfair.ncol) or ta.column_count
 
         if num_x <= 2 then num_x = 2 end
         if ncol  <= 1 then ncol  = 1 end
+        local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
 
         local num_y     = math.max(math.ceil(#cls / num_x), ncol)
         local height    = math.floor((wa.height - (num_y + 1)*useless_gap) / num_y)
@@ -143,13 +146,14 @@ local function do_fair(p, orientation)
         --   +---+---+---+      +---+---+---+
 
         -- How many vertical columns? Read from nmaster on the tag.
-        local num_x = tonumber(termfair.center.nmaster) or tag.master_count
-        local ncol  = tonumber(termfair.center.ncol) or tag.column_count
-        local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
+        local num_x = tonumber(termfair.center.nmaster) or ta.master_count
+        local ncol  = tonumber(termfair.center.ncol) or ta.column_count
 
         if num_x <= 2 then num_x = 2 end
         if ncol  <= 1 then ncol  = 1 end
 
+        local width = math.floor((wa.width - (num_x + 1)*useless_gap) / num_x)
+
         if #cls < num_x then
             -- Less clients than the number of columns, let's center it!
             local offset_x = wa.x + (wa.width - #cls*width - (#cls - 1)*useless_gap) / 2