initial commit

LibTSM/Service/ItemTooltipClasses/ExtraTip.lua

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+-- ------------------------------------------------------------------------------ --
+--                                TradeSkillMaster                                --
+--                          https://tradeskillmaster.com                          --
+--    All Rights Reserved - Detailed license information included with addon.     --
+-- ------------------------------------------------------------------------------ --
+
+local _, TSM = ...
+local ExtraTip = TSM.Init("Service.ItemTooltipClasses.ExtraTip")
+local private = {
+	numExtraTips = 0,
+}
+
+
+
+-- ============================================================================
+-- Module Functions
+-- ============================================================================
+
+function ExtraTip.Create(tooltip)
+	return private.CreateExtraTip(tooltip)
+end
+
+
+
+-- ============================================================================
+-- Extra Tip Methods
+-- ============================================================================
+
+local EXTRA_TIP_METHODS = {
+	Attach = function(self, tooltip)
+		self:SetOwner(tooltip, "ANCHOR_PRESERVE")
+		self.anchorFrame = nil
+		self:OnUpdate()
+	end,
+
+	Show = function(self)
+		self.anchorFrame = nil
+		GameTooltip.Show(self)
+		local bottom = self:GetBottom()
+		if bottom and self:GetParent():IsShown() then
+			self.isTop = bottom <= 0
+		end
+		self:OnUpdate()
+		local numLines = self:NumLines()
+		local changedLines = self.changedLines or 0
+		if changedLines >= numLines then return end
+		for i = changedLines + 1, numLines do
+			local left, right = self.Left[i], self.Right[i]
+			local font = i == 1 and GameTooltipHeader or GameFontNormal
+
+			local r, g, b, a = left:GetTextColor()
+			left:SetFontObject(font)
+			left:SetTextColor(r, g, b, a)
+
+			r, g, b, a = right:GetTextColor()
+			right:SetFontObject(font)
+			right:SetTextColor(r, g, b, a)
+		end
+		self.changedLines = numLines
+		GameTooltip.Show(self)
+		self:OnUpdate()
+	end,
+
+	OnUpdate = function(self)
+		local tooltip = self:GetParent()
+		local anchorFrame = private.GetExtraTipFrame(tooltip, tooltip:GetChildren()) or tooltip
+		if anchorFrame ~= self.anchorFrame then
+			self:ClearAllPoints()
+			if self.isTop then
+				self:SetPoint("BOTTOM", anchorFrame, "TOP")
+			else
+				self:SetPoint("TOP", anchorFrame, "BOTTOM")
+			end
+			self.anchorFrame = anchorFrame
+		end
+	end,
+}
+
+local LINE_METATABLE = {
+	__index = function(t, k)
+		local v = _G[t.name..k]
+		rawset(t, k, v)
+		return v
+	end,
+}
+
+
+
+-- ============================================================================
+-- Private Helper Functions
+-- ============================================================================
+
+function private.CreateExtraTip(tooltip)
+	private.numExtraTips = private.numExtraTips + 1
+	local extraTip = CreateFrame("GameTooltip", "TSMExtraTip"..private.numExtraTips, tooltip, "GameTooltipTemplate")
+	extraTip:SetClampedToScreen(true)
+
+	for name, func in pairs(EXTRA_TIP_METHODS) do
+		extraTip[name] = func
+	end
+
+	extraTip.Left = setmetatable({name = extraTip:GetName().."TextLeft"}, LINE_METATABLE)
+	extraTip.Right = setmetatable({name = extraTip:GetName().."TextRight"}, LINE_METATABLE)
+	return extraTip
+end
+
+function private.GetExtraTipFrame(tooltip, ...)
+	for i = 1, select('#', ...) do
+		local frame = select(i, ...)
+		if frame.InitLines and frame:GetParent() == tooltip and frame:IsVisible() then
+			return frame
+		end
+	end
+end