--- a/utils.lua	Wed Apr 27 21:55:33 2011 +0200
+++ b/utils.lua	Wed Apr 27 23:46:20 2011 +0200
@@ -58,3 +58,149 @@
 		A.DEBUG("Tradeskill not found for "..itemID)
 	end -- function
 end -- do
+
+
+-- Taken from Datastore_Crafts
+-- *** Scanning functions ***
+do
+	local selectedTradeSkillIndex
+	local subClasses, subClassID
+	local invSlots, invSlotID
+	local haveMats
+	local headersState = {}
+
+	local function GetSubClassID()
+		-- The purpose of this function is to get the subClassID in a UI independant way
+		-- ie: without relying on UIDropDownMenu_GetSelectedID(TradeSkillSubClassDropDown), which uses a hardcoded frame name.
+
+		if GetTradeSkillSubClassFilter(0) then		-- if "All Subclasses" is selected, GetTradeSkillSubClassFilter() will return 1 for all indexes, including 0
+			return 1				-- thus return 1 as selected id	(as would be returned by UIDropDownMenu_GetSelectedID(TradeSkillSubClassDropDown))
+		end
+
+		local filter
+		for i = 1, #subClasses do
+			filter = GetTradeSkillSubClassFilter(i)
+			if filter then
+				return i+1			-- ex: 3rd element of the subClasses array, but 4th in the dropdown due to "All Subclasses", so return i+1
+			end
+		end
+	end
+
+	local function GetInvSlotID()
+		-- The purpose of this function is to get the invSlotID in a UI independant way	(same as GetSubClassID)
+		-- ie: without relying on UIDropDownMenu_GetSelectedID(TradeSkillInvSlotDropDown), which uses a hardcoded frame name.
+
+		if GetTradeSkillInvSlotFilter(0) then		-- if "All Slots" is selected, GetTradeSkillInvSlotFilter() will return 1 for all indexes, including 0
+			return 1				-- thus return 1 as selected id	(as would be returned by  UIDropDownMenu_GetSelectedID(TradeSkillInvSlotDropDown))
+		end
+
+		local filter
+		for i = 1, #invSlots do
+			filter = GetTradeSkillInvSlotFilter(i)
+			if filter then
+				return i+1			-- ex: 3rd element of the invSlots array, but 4th in the dropdown due to "All Slots", so return i+1
+			end
+		end
+	end
+
+	function A.SaveActiveFilters()
+		print("save")
+		selectedTradeSkillIndex = GetTradeSkillSelectionIndex()
+
+		subClasses = { GetTradeSkillSubClasses() }
+		invSlots = { GetTradeSkillInvSlots() }
+		subClassID = GetSubClassID()
+		invSlotID = GetInvSlotID()
+
+		-- Subclasses
+		SetTradeSkillSubClassFilter(0, 1, 1)	-- this checks "All subclasses"
+		if TradeSkillSubClassDropDown then
+			UIDropDownMenu_SetSelectedID(TradeSkillSubClassDropDown, 1)
+		end
+
+		-- Inventory slots
+		SetTradeSkillInvSlotFilter(0, 1, 1)		-- this checks "All slots"
+		if TradeSkillInvSlotDropDown then
+			UIDropDownMenu_SetSelectedID(TradeSkillInvSlotDropDown, 1)
+		end
+
+		-- Have Materials
+		if TradeSkillFrameAvailableFilterCheckButton then
+			haveMats = TradeSkillFrameAvailableFilterCheckButton:GetChecked()	-- nil or true
+			TradeSkillFrameAvailableFilterCheckButton:SetChecked(false)
+		end
+		TradeSkillOnlyShowMakeable(false)
+
+		-- Headers
+		local headerCount = 0		-- use a counter to avoid being bound to header names, which might not be unique.
+
+		for i = GetNumTradeSkills(), 1, -1 do		-- 1st pass, expand all categories
+			local _, skillType, _, isExpanded  = GetTradeSkillInfo(i)
+			 if (skillType == "header") then
+				headerCount = headerCount + 1
+				if not isExpanded then
+					ExpandTradeSkillSubClass(i)
+					headersState[headerCount] = true
+				end
+			end
+		end
+
+		print("saved")
+	end
+
+	function A.RestoreActiveFilters()
+		print("restore")
+		-- Subclasses
+		SetTradeSkillSubClassFilter(subClassID-1, 1, 1)	-- this checks the previously checked value
+
+		local frame = TradeSkillSubClassDropDown
+		if frame then	-- other addons might nil this frame (delayed load, etc..), so secure DDM calls
+			local text = (subClassID == 1) and ALL_SUBCLASSES or subClasses[subClassID-1]
+			UIDropDownMenu_SetSelectedID(frame, subClassID)
+			UIDropDownMenu_SetText(frame, text);
+		end
+
+		subClassID = nil
+		wipe(subClasses)
+		subClasses = nil
+
+		-- Inventory slots
+		invSlotID = invSlotID or 1
+		SetTradeSkillInvSlotFilter(invSlotID-1, 1, 1)	-- this checks the previously checked value
+
+		frame = TradeSkillInvSlotDropDown
+		if frame then
+			local text = (invSlotID == 1) and ALL_INVENTORY_SLOTS or invSlots[invSlotID-1]
+			UIDropDownMenu_SetSelectedID(frame, invSlotID)
+			UIDropDownMenu_SetText(frame, text);
+		end
+
+		invSlotID = nil
+		wipe(invSlots)
+		invSlots = nil
+
+		-- Have Materials
+		if TradeSkillFrameAvailableFilterCheckButton then
+			TradeSkillFrameAvailableFilterCheckButton:SetChecked(haveMats or false)
+		end
+		TradeSkillOnlyShowMakeable(haveMats or false)
+		haveMats = nil
+
+		SelectTradeSkill(selectedTradeSkillIndex)
+		selectedTradeSkillIndex = nil
+
+		-- Headers
+		local headerCount = 0
+		for i = GetNumTradeSkills(), 1, -1 do
+			local _, skillType  = GetTradeSkillInfo(i)
+			if (skillType == "header") then
+				headerCount = headerCount + 1
+				if headersState[headerCount] then
+					CollapseTradeSkillSubClass(i)
+				end
+			end
+		end
+		wipe(headersState)
+	end
+	print("restored")
+end