Fix more issues for 3.6. The arrow_prefix now work using a new hack

The "hack" force the full redraw of the menu. This is what 3.5 did
anyway, but of course is not correct. The new layout system allow
widgets to have a larger fit and it should cascade by itself. This
is not yet used by radical.

This commit also fix some mistake made during the initial port.

My whole config now load mostly correctly. Some 3.5 era bugs even
fixed themselves! It is still slower for some reasons and have many
errors left, but it "look" ok.

bar.lua

@@ -94,7 +94,9 @@ local function setup_drawable(data)
   end)
   data:connect_signal("item::removed",function(_,item,old_idx)
     table.remove(internal.layout.widgets,old_idx)
+    if internal.layout._emit_updated then
       item.widget:disconnect_signal("widget::updated", internal.layout._emit_updated)
+    end
     internal.layout:emit_signal("widget::updated")
   end)
   data:connect_signal("item::appended",function(_,item)

item/init.lua

@@ -210,6 +210,13 @@ local function new_item(data,args)
   -- Listen to signals
   item:connect_signal("state::changed",function()
     item:style()
+
+    -- Some item.style need full widget repaint
+    if item.style.need_full_repaint then
+      --TODO HACK HACK HACK for the repaint, this is really, really stupid
+      data._internal.layout:emit_signal("widget::redraw_needed")
+      --TODO END HACK
+    end
   end)
 
   -- Add support for long hover and press

item/layout/icon.lua

@@ -85,7 +85,7 @@ local function create_item(item,data,args)
   bg.fit = function(box, context, w,h)
 --     args.y = data.height-h-data.margins.top --TODO dead code?
     if data._internal.layout.item_fit then
-      return data._internal.layout.item_fit(data,item,box,contextw,h)
+      return data._internal.layout.item_fit(data,item,box,context, w, h)
     else
       return wibox.widget.background.fit(box,context, w,h)
     end

item/style/arrow_3d.lua

@@ -10,7 +10,8 @@ local module = {
     BOTTOM = 2,
     RIGHT  = 2,
     LEFT   = 4
-  }
+  },
+  need_full_repaint = true
 }
 
 local function create_path(cr,x,height,padding)

item/style/arrow_alt.lua

@@ -15,7 +15,8 @@ local module = {
     BOTTOM = 2,
     RIGHT  = 20,
     LEFT   = 3
-  }
+  },
+  need_full_repaint = true
 }
 
 local hcode = {"#7777ff","#ff7777","#77ff77","#77ffff","#ffff77"}

item/style/arrow_prefix.lua

@@ -12,7 +12,8 @@ local module = {
     BOTTOM = 0,
     RIGHT  = 0,
     LEFT   = 0
-  }
+  },
+  need_full_repaint = true
 }
 
 local function prefix_draw(self, context, cr, width, height)

item/style/slice_prefix.lua

@@ -12,7 +12,8 @@ local module = {
     BOTTOM = 0,
     RIGHT  = 0,
     LEFT   = 0
-  }
+  },
+  need_full_repaint = true
 }
 
 local function prefix_draw(self, context, cr, width, height)

layout/horizontal.lua

@@ -133,9 +133,9 @@ function module:setup_item(data,item,args)
 end
 
 --Get preferred item geometry
-local function item_fit(data,item,...)
+local function item_fit(data,item,self, content, width, height)
   if not data.visible then return 1,1 end
-  local w, h = item._private_data._fit(...)
+  local w, h = item._private_data._fit(self,content,width,height) --TODO port to new context API
   return data.item_width or 70, item._private_data.height or h
 end
 
@@ -144,8 +144,15 @@ local function new(data)
     base = require( "radical.base" )
   end
   local l = wibox.layout.fixed.horizontal()
-  l.fit = function(self,context,w,h,force_values) --TODO use the context instead of extra argument
-    local result,r2 = wibox.layout.fixed:get_preferred_size(self,context, force_values and w, force_values and h)
+  l._fit = l.fit
+  local new_fit
+  new_fit = function(self,context,w,h,force_values) --TODO use the context instead of extra argument
+
+    -- Get the original fit, the function need to be replaced to avoir a stack overflow
+    l.fit = l._fit
+    local result,r2 = self:get_preferred_size(context, force_values and w, force_values and h)
+    l.fit = new_fit
+
     local w,h
     if data.auto_resize and data._internal.largest_item_h then
       w,h = data.rowcount*(data.item_width or data.default_width),data._internal.largest_item_h_v > data.item_height and data._internal.largest_item_h_v or data.item_height
@@ -155,6 +162,7 @@ local function new(data)
     data:emit_signal("layout_size",w,h)
     return w,h
   end
+  l.fit = new_fit
   l.add = function(l,item)
     return wibox.layout.fixed.add(l,item.widget)
   end

layout/vertical.lua

@@ -52,38 +52,16 @@ function module:setup_key_hooks(data)
 end
 
 --Get preferred item geometry
-local function item_fit(data,item,self,width,height)
+local function item_fit(data,item,self,context, width,height)
   local w, h = 0,0--item._internal.cache_w or 1,item._internal.cache_h or 1
   if data.visible then
-    w, h = item._private_data._fit({},self,{},width,height)
+    w, h = item._private_data._fit({},self,context,width,height)
     item._internal.pix_cache = {} --Clear the pimap cache
   end
 
   return w, item.height or h
 end
 
--- As of July 2013, LGI is too slow to redraw big menus at ok speed
--- This do a pixmap cache to allow pre-rendering
-local function cache_pixmap(item)
-  item._internal.pix_cache = {}
-  item.widget._draw = item.widget.draw
-  item.widget.draw = function(self, context, cr, width, height)
-    if not w.visible or item._hidden then return end
-    if item._internal.pix_cache[10*width+7*height+(item.selected and 8888 or 999)] then
-      cr:set_source_surface(item._internal.pix_cache[10*width+7*height+(item.selected and 8888 or 999)])
-      cr:paint()
-    else
-      local img5 = cairo.ImageSurface.create(cairo.Format.ARGB32, width, height)
-      local cr5 = cairo.Context(img5)
-      item.widget._draw(self, context, cr5, width, height)
-      cr:set_source_surface(img5)
-      cr:paint()
-      item._internal.pix_cache[10*width+7*height+(item.selected and 8888 or 999)] = img5
-      return
-    end
-  end
-end
-
 function module:setup_text(item,data,text_w)
   local text_w = item._internal.text_w
 
@@ -113,8 +91,7 @@ function module:setup_item(data,item,args)
   end
   --Create the background
   local item_layout = item.layout or data.item_layout or horizontal_item_layout
-  item.widget = item_layout(item,data,args)--wibox.widget.background()
-  cache_pixmap(item)
+  item.widget = item_layout(item,data,args)
 
   --Event handling
   if data.select_on == base.event.HOVER then