Bring in tip scanner external

GnomishVendorShrinker.toc

@@ -11,7 +11,7 @@
 ## X-LoadOn-InterfaceOptions: GnomishVendorShrinker
 
 externals\itemid.lua
-externals\ptr.lua
+externals\tooltip_scanner.lua
 
 tekFunks\gsc.lua
 tekKonfig\tekKonfig.xml

KnownScanner.lua

@@ -1,31 +1,28 @@
 
 local myname, ns = ...
 
-local tip = CreateFrame("GameTooltip")
-tip:SetOwner(WorldFrame, "ANCHOR_NONE")
 
-local lcache = {}
-for i=1,40 do
-	lcache[i] = tip:CreateFontString()
-	tip:AddFontStrings(lcache[i], tip:CreateFontString())
+local function HasHeirloom(id)
+	return C_Heirloom.IsItemHeirloom(id) and C_Heirloom.PlayerHasHeirloom(id)
 end
 
-ns.knowns = setmetatable({}, {__index = function(t, i)
-	local id = ns.ids[i]
-	if not id then return end
 
-	if C_Heirloom.IsItemHeirloom(id) and C_Heirloom.PlayerHasHeirloom(id) then
-		t[i] = true
-		return true
+local function IsKnown(link)
+	ns.scantip:SetHyperlink(link)
+	for i=1,ns.scantip:NumLines() do
+		if ns.scantip.L[i] == ITEM_SPELL_KNOWN then return true end
 	end
+end
 
-	tip:ClearLines()
-	if not tip:IsOwned(WorldFrame) then tip:SetOwner(WorldFrame, "ANCHOR_NONE") end
-	tip:SetHyperlink(i)
-	for i=1,tip:NumLines() do
-		if lcache[i]:GetText() == ITEM_SPELL_KNOWN then
+
+ns.knowns = setmetatable({}, {
+	__index = function(t, i)
+		local id = ns.ids[i]
+		if not id then return end
+
+		if HasHeirloom(id) or IsKnown(i) then
 			t[i] = true
 			return true
 		end
 	end
-end})
+})

externals.txt

@@ -1 +1,2 @@
 itemid.lua
+tooltip_scanner.lua

externals/tooltip_scanner.lua

@@ -0,0 +1,76 @@
+
+local myname, ns = ...
+
+
+local tip = CreateFrame("GameTooltip")
+tip:SetOwner(WorldFrame, "ANCHOR_NONE")
+
+ns.scantip = tip
+
+
+local lcache, rcache = {}, {}
+for i=1,30 do
+	lcache[i], rcache[i] = tip:CreateFontString(), tip:CreateFontString()
+	lcache[i]:SetFontObject(GameFontNormal)
+	rcache[i]:SetFontObject(GameFontNormal)
+	tip:AddFontStrings(lcache[i], rcache[i])
+end
+
+
+-- GetText cache tables, provide fast access to the tooltip's text
+tip.L = setmetatable({}, {
+	__index = function(t, key)
+		if tip:NumLines() >= key and lcache[key] then
+			local v = lcache[key]:GetText()
+			t[key] = v
+			return v
+		end
+		return nil
+	end,
+})
+
+
+tip.R = setmetatable({}, {
+	__index = function(t, key)
+		if tip:NumLines() >= key and rcache[key] then
+			local v = rcache[key]:GetText()
+			t[key] = v
+			return v
+		end
+		return nil
+	end,
+})
+
+
+-- Performes a "full" erase of the tooltip
+tip.Erase = function(self)
+	self:ClearLines() -- Ensures tooltip's NumLines is reset
+	for i in pairs(self.L) do self.L[i] = nil end -- Flush the metatable cache
+	for i in pairs(self.R) do
+		self.rcache[i]:SetText() -- Clear text from right side (ClearLines only hides them)
+		self.R[i] = nil -- Flush the metatable cache
+	end
+	if not self:IsOwned(WorldFrame) then
+		self:SetOwner(WorldFrame, "ANCHOR_NONE")
+	end
+end
+
+
+-- Hooks the Set* methods to force a full erase beforehand
+local methods = {"SetMerchantCostItem", "SetBagItem", "SetAction",
+  "SetAuctionItem", "SetAuctionSellItem", "SetBuybackItem", "SetCraftItem",
+  "SetCraftSpell", "SetHyperlink", "SetInboxItem", "SetInventoryItem",
+  "SetLootItem", "SetLootRollItem", "SetMerchantItem", "SetPetAction",
+  "SetPlayerBuff", "SetQuestItem", "SetQuestLogItem", "SetQuestRewardSpell",
+  "SetSendMailItem", "SetShapeshift", "SetSpell", "SetTalent",
+  "SetTrackingSpell", "SetTradePlayerItem", "SetTradeSkillItem",
+  "SetTradeTargetItem", "SetTrainerService", "SetUnit", "SetUnitBuff",
+  "SetUnitDebuff"}
+for _,m in pairs(methods) do
+	local orig = tip[m]
+	tip[m] = function(self, ...)
+		self:Erase()
+		return orig(self, ...)
+	end
+end
+