improve visibility driver logic and API

ActionBarStates.lua

@@ -268,7 +268,9 @@ function module:CreateStanceMap()
 	self.stancemap = defstancemap
 end
 
-function ActionBar:UpdateStates(noHideDriver)
+function ActionBar:UpdateStates()
+	if not self.buttons then return end
+	self:InitVisibilityDriver()
 	self.statebutton = {}
 	if not module.stancemap and module.DefaultStanceMap[playerclass] then 
 		module.stancemap = module.DefaultStanceMap[playerclass]
@@ -277,7 +279,7 @@ function ActionBar:UpdateStates(noHideDriver)
 		self:AddButtonStates(i)
 	end
 	
-	local statedriver, hidedriver = {}, {}
+	local statedriver = {}
 	if self:GetStateOption("possess") then
 		self:AddButtonStates(11)
 		table_insert(statedriver, "[bonusbar:5]11")
@@ -292,7 +294,7 @@ function ActionBar:UpdateStates(noHideDriver)
 			local page = self:GetStateOption(v)
 			if page and page ~= 0 then
 				if page == -1 then
-					table_insert(hidedriver, fmt("[modifier:%s]hide", v))
+					self:RegisterVisibilityCondition(fmt("[modifier:%s]hide", v))
 				else
 					table_insert(statedriver, fmt("[modifier:%s]%s", v, page)) 
 				end
@@ -316,14 +318,14 @@ function ActionBar:UpdateStates(noHideDriver)
 						local prowl = self:GetStanceState("prowl")
 						if prowl then
 							if prowl == -1 then
-								table_insert(hidedriver, fmt("[bonusbar:%s,stealth:1]hide", v.index))
+								self:RegisterVisibilityCondition(fmt("[bonusbar:%s,stealth:1]hide", v.index))
 							else
 								table_insert(statedriver, fmt("[bonusbar:%s,stealth:1]%s", v.index, prowl))
 							end
 						end
 					end
 					if state == -1 then
-						table_insert(hidedriver, fmt("[bonusbar:%s]hide", v.index))
+						self:RegisterVisibilityCondition(fmt("[bonusbar:%s]hide", v.index))
 					else
 						table_insert(statedriver, fmt("[bonusbar:%s]%s", v.index, state))
 					end
@@ -333,24 +335,16 @@ function ActionBar:UpdateStates(noHideDriver)
 	end
 	
 	table_insert(statedriver, tostring(self:GetDefaultState() or 0))
-	table_insert(hidedriver, "show")
 	
 	RegisterStateDriver(self, "page", table_concat(statedriver, ";"))
 	self:SetAttribute("statemap-page", "$input")
 	
-	if not noHideDriver then
-		RegisterStateDriver(self, "visibility", table_concat(hidedriver, ";"))
-		self:SetAttribute("statemap-visibility", "$input")
-		self:SetAttribute("state-visibility",  self:GetAttribute("state-visibility"))
-	else
-		UnregisterStateDriver(self, "visibility")
-		self:Show()
-	end
-	
 	self:ApplyStateButton()
 	
 	SecureStateHeader_Refresh(self)
 	self:SetAttribute("state", self:GetAttribute("state-page"))
+	
+	self:ApplyVisibilityDriver()
 end
 
 function ActionBar:GetStanceState(stance)