awful.layout: do not use global env

Layouts are passed a data structure that holds all the
information they need to render the clients.

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/layout/init.lua.in

@@ -9,6 +9,7 @@ local ipairs = ipairs
 local tag = require("awful.tag")
 local util = require("awful.util")
 local suit = require("awful.layout.suit")
+local client = require("awful.client")
 local capi =
 {
     hooks = hooks,
@@ -59,7 +60,16 @@ end
 
 -- Register an arrange hook.
 local function on_arrange (screen)
-    get(screen).arrange(screen)
+    local t = tag.selected(screen)
+    local p = {}
+    p.workarea = capi.screen[screen].workarea
+    p.geometry = capi.screen[screen].geometry
+    p.clients = client.tiled(screen)
+    p.ncol = tag.getncol(t)
+    p.nmaster = tag.getnmaster(t)
+    p.mwfact = tag.getmwfact(t)
+    p.tagdata = tag.getdata(t)
+    get(screen).arrange(p)
 end
 
 --- Get the current layout name.

lib/awful/layout/suit/fair.lua.in

@@ -7,18 +7,13 @@
 -- Grab environment we need
 local ipairs = ipairs
 local math = math
-local client = require("awful.client")
-local capi =
-{
-    screen = screen
-}
 
 --- Fair layouts module for awful
 module("awful.layout.suit.fair")
 
-local function fair(screen, orientation)
-    local wa = capi.screen[screen].workarea
-    local cls = client.tiled(screen)
+local function fair(p, orientation)
+    local wa = p.workarea
+    local cls = p.clients
 
     if #cls > 0 then
         local cells = math.ceil(math.sqrt(#cls))

lib/awful/layout/suit/floating.lua.in

@@ -7,7 +7,7 @@
 --- Dummy function for floating layout
 module("awful.layout.suit.floating")
 
-function arrange(screen)
+function arrange(p)
     return nil
 end
 

lib/awful/layout/suit/magnifier.lua.in

@@ -18,14 +18,12 @@ local client = require("awful.client")
 --- Magnifier layout module for awful
 module("awful.layout.suit.magnifier")
 
-function arrange(screen)
+function arrange(p)
     -- Fullscreen?
-    local area = capi.screen[screen].workarea
-    local cls = client.tiled(screen)
+    local area = p.workarea
+    local cls = p.clients
     local focus = capi.client.focus
-    local t = tag.selected(screen)
-    local mwfact = tag.getmwfact(t)
-    local fidx -- Focus client index in cls table
+    local mwfact = p.mwfact
 
     -- Check that the focused window is on the right screen
     if focus and focus.screen ~= screen then focus = nil end

lib/awful/layout/suit/max.lua.in

@@ -7,41 +7,35 @@
 -- Grab environment we need
 local pairs = pairs
 local client = require("awful.client")
-local capi =
-{
-    screen = screen
-}
 
 --- Maximized and fullscreen layouts module for awful
 module("awful.layout.suit.max")
 
-local function fmax(screen, fs)
+local function fmax(p, fs)
     -- Fullscreen?
     local area
     if fs then
-        area = capi.screen[screen].geometry
+        area = p.geometry
     else
-        area = capi.screen[screen].workarea
+        area = p.workarea
     end
 
-    for k, c in pairs(client.visible(screen)) do
-        if not client.floating.get(c) then
+    for k, c in pairs(p.clients) do
         c:geometry(area)
     end
 end
-end
 
 --- Maximized layout.
 -- @param screen The screen to arrange.
 name = "max"
-function arrange(screen)
-    return fmax(screen, false)
+function arrange(p)
+    return fmax(p, false)
 end
 
 --- Fullscreen layout.
 -- @param screen The screen to arrange.
 fullscreen = {}
 fullscreen.name = "fullscreen"
-function fullscreen.arrange(screen)
-    return fmax(screen, true)
+function fullscreen.arrange(p)
+    return fmax(p, true)
 end

lib/awful/layout/suit/tile.lua.in

@@ -9,12 +9,6 @@
 -- Grab environment we need
 local ipairs = ipairs
 local math = math
-local client = require("awful.client")
-local tag = require("awful.tag")
-local capi =
-{
-    screen = screen
-}
 
 --- Tiled layouts module for awful
 module("awful.layout.suit.tile")
@@ -75,10 +69,9 @@ local function tile_group(cls, wa, orientation, fact, group)
     end
 
     return used_size
-
 end
 
-local function tile(screen, orientation)
+local function tile(param, orientation)
     orientation = orientation or "right"
 
     -- this handles are different orientations
@@ -93,23 +86,21 @@ local function tile(screen, orientation)
         y = "x"
     end
 
-    local t = tag.selected(screen)
-    local cls = client.tiled(screen)
-    local nmaster = math.min(tag.getnmaster(t), #cls)
+    local cls = param.clients
+    local nmaster = math.min(param.nmaster, #cls)
     local nother = math.max(#cls - nmaster,0)
 
-    local mwfact = tag.getmwfact(t)
-    local wa = capi.screen[screen].workarea
-    local ncol = tag.getncol(t)
+    local mwfact = param.mwfact
+    local wa = param.workarea
+    local ncol = param.ncol
 
-    local data = tag.getproperty(t,"windowfact")
+    local data = param.tagdata.windowfact
 
     if not data then
         data = {}
-        tag.setproperty(t,"windowfact", data)
+        param.tagdata.windowfact = data
     end
 
-    --
     local coord = wa[x]
     local place_master = true
     if orientation == "left" or orientation == "top" then
@@ -163,24 +154,24 @@ right.arrange = tile
 -- @param screen The screen number to tile.
 left = {}
 left.name = "tileleft"
-function left.arrange(screen)
-    return tile(screen, "left")
+function left.arrange(p)
+    return tile(p, "left")
 end
 
 --- The main tile algo, on bottom.
 -- @param screen The screen number to tile.
 bottom = {}
 bottom.name = "tilebottom"
-function bottom.arrange(screen)
-    return tile(screen, "bottom")
+function bottom.arrange(p)
+    return tile(p, "bottom")
 end
 
 --- The main tile algo, on top.
 -- @param screen The screen number to tile.
 top = {}
 top.name = "tiletop"
-function top.arrange(screen)
-    return tile(screen, "top")
+function top.arrange(p)
+    return tile(p, "top")
 end
 
 arrange = right.arrange

lib/awful/tag.lua.in

@@ -244,6 +244,13 @@ local function hook_tags(screen, tag, action)
     end
 end
 
+--- Get tag data table.
+-- @param tag The Tag.
+-- @return The data table.
+function getdata(tag)
+    return data.tags[tag]
+end
+
 --- Get a tag property.
 -- @param tag The tag.
 -- @param prop The property name.