--[[
Name: TipHooker-1.0
Description: A Library for hooking tooltips.
Revision: $Revision: 67029 $
Author: Whitetooth@Cenarius (hotdogee@bahamut.twbbs.org)
LastUpdate: $Date: 2008-03-30 13:22:17 +0800 (星期日, 30 三月 2008) $
Website:
Documentation:
SVN: $URL: http://svn.wowace.com/wowace/trunk/TipHookerLib/TipHooker-1.0/TipHooker-1.0.lua $
Dependencies: AceLibrary
License: LGPL v2.1
]]

-- This library is still in early development

--[[ Tips for using TipHooker
{
This library provides tooltip hooks, mainly for use with tooltip modification, you can eazily append or modify text in a tooltip with TipHookerLib.
If you need to not only modify the tooltip but also need to scan the tooltip for information, you should use other libraries with TipHookerLib.
Bedcause TipHookerLib passes the real tooltip frame to your handler function,
which may already be modifided by other addons and may not be suited for scanning.
For simple custom scaning you can use GratuityLib, it creates a custom tooltip and scan that for patterns.
For a complete item scanning solution to stat scanning you can use ItemBonusLib, or my more light weight version: StatLogicLib.
}
--]]


local MAJOR_VERSION = "TipHooker-1.0"
local MINOR_VERSION = tonumber(("$Revision: 67029 $"):sub(12, -3))

if not AceLibrary then error(MAJOR_VERSION.." requires AceLibrary") end
if not AceLibrary:IsNewVersion(MAJOR_VERSION, MINOR_VERSION) then return end

local TipHooker = {}
local VariablesLoaded

-----------
-- Tools --
-----------
local DEBUG = false

-- Localize globals
local _G = getfenv(0)
local select = select
local pairs = pairs
local ipairs = ipairs
local IsAddOnLoaded = IsAddOnLoaded

local function print(text)
	if DEBUG then
		DEFAULT_CHAT_FRAME:AddMessage(text)
	end
end

-- copyTable
local function copyTable(to, from)
	if not to then
		to = {}
	end
	for k,v in pairs(from) do
		if type(k) == "table" then
			k = copyTable({}, k)
		end
		if type(v) == "table" then
			v = copyTable({}, v)
		end
		to[k] = v
	end
	setmetatable(to, getmetatable(from))
	return to
end

-----------------------
-- Hook Tooltip Core --
-----------------------
local TooltipList = {
	item = {
		"GameTooltip",
		"ItemRefTooltip",
		"ShoppingTooltip",
		-- EquipCompare support
		"ComparisonTooltip",
		-- EQCompare support
		"EQCompareTooltip",
		-- takKompare support
		"tekKompareTooltip",
		-- LinkWrangler support
		"IRR_",
		"LinkWrangler",
		-- MultiTips support
		-- Links support
		"LinksTooltip",
		-- AtlasLoot support
		"AtlasLootTooltip",
		-- ItemMagic support
		"ItemMagicTooltip",
		-- Sniff support
		"SniffTooltip",
		-- LinkHeaven support
		"LH_",
		-- Mirror support
		"MirrorTooltip",
		-- TooltipExchange support
		"TooltipExchange_TooltipShow",
		-- AtlasQuest support
		"AtlasQuestTooltip",
	},
	buff = {
		"GameTooltip",
	},
	spell = {
		"GameTooltip",
	},
	talant = {
		"GameTooltip",
	},
	unit = {
		"GameTooltip",
	},
	action = {
		"GameTooltip",
	},
}

local MethodList = {
	item = {
		"SetHyperlink",
		"SetBagItem",
		"SetInventoryItem",
		-- auction
		"SetAuctionItem",
		"SetAuctionSellItem",
		-- loot
		"SetLootItem",
		"SetLootRollItem",
		-- crafting
		"SetCraftSpell",
		"SetCraftItem",
		"SetTradeSkillItem",
		"SetTrainerService",
		-- mail
		"SetInboxItem",
		"SetSendMailItem",
		-- quest log
		"SetQuestItem",
		"SetQuestLogItem",
		-- trade
		"SetTradePlayerItem",
		"SetTradeTargetItem",
		-- vendor tooltip
		"SetMerchantItem",
		"SetBuybackItem",
		"SetMerchantCostItem",
		-- socketing interface
		"SetSocketGem",
		"SetExistingSocketGem",
		-- 2.1.0
		"SetHyperlinkCompareItem",
		-- 2.3.0
		"SetGuildBankItem",
	},
	buff = {
		"SetPlayerBuff",
		"SetUnitBuff",
		"SetUnitDebuff",
	},
	spell = {
		"SetSpell",
		"SetTrackingSpell",
		"SetShapeshift",
	},
	talant = {
		"SetTalent",
	},
	unit = {
		"SetUnit",
	},
	action = {
		"SetAction",
		"SetPetAction",
	},
}

local HandlerList = {}

local Set = {
	item = function(tooltip)
		if not tooltip.GetItem then return end
		local name, link = tooltip:GetItem()
		-- Check for empty slots
		if not name then return end
		for handler in pairs(HandlerList.item) do
			handler(tooltip, name, link)
		end
	end,
	buff = function(tooltip, unitId, buffIndex, raidFilter)
		if not unitId then
			unitId = "player"
		end
		for handler in pairs(HandlerList.buff) do
			handler(tooltip, unitId, buffIndex, raidFilter)
		end
	end,
	spell = function(tooltip, spellId, bookType)
		for handler in pairs(HandlerList.spell) do
			handler(tooltip, spellId, bookType)
		end
	end,
	talant = function(tooltip, tabIndex, talentIndex)
		for handler in pairs(HandlerList.talant) do
			handler(tooltip, tabIndex, talentIndex)
		end
	end,
	unit = function(tooltip, unit)
		if not tooltip.GetUnit then return end
		local name = tooltip:GetUnit()
		for handler in pairs(HandlerList.unit) do
			handler(tooltip, unit)
		end
	end,
	action = function(tooltip, slot)
		for handler in pairs(HandlerList.action) do
			handler(tooltip, slot)
		end
	end,
}


-- This gets called during VARIABLES_LOADED and :Hook()
-- InitializeHook will hook all methods in MethodList[tipType]
-- from tooltips in TooltipList[tipType] to the Set[tipType] function
local Initialized = {}
TipHooker.SupportedTooltips = {}
TipHooker.HookedFrames = {}
local function InitializeHook(tipType)
	if Initialized[tipType] then return end
	-- Walk through all frames
	local tooltip = EnumerateFrames()
	while tooltip do
	    if tooltip:GetObjectType() == "GameTooltip" then
	        local name = tooltip:GetName()
	        if name then
		        for _, v in ipairs(TooltipList[tipType]) do
		        	if strfind(name, v) then
			        	print("InitializeHook("..tipType..") = "..name)
						for _, methodName in ipairs(MethodList[tipType]) do
							if type(tooltip[methodName]) == "function" then
								hooksecurefunc(tooltip, methodName, Set[tipType])
							end
						end
						tinsert(_G.TipHooker.SupportedTooltips, tooltip)
						break
					end
		        end
		    end
	    end
	    tooltip = EnumerateFrames(tooltip)
	end
	-- Destroy tooltip list so we don't have double hooking accidents
	Initialized[tipType] = true
end

local function CreateFrameHook(frameType, name, parent, inheritFrame)
	if name and frameType == "GameTooltip" then
		for tipType in pairs(HandlerList) do
	        for _, v in ipairs(TooltipList[tipType]) do
	        	if strfind(name, v) then
			        print("CreateFrameHook("..tipType..") = "..name)
		        	local tooltip = _G[name]
					for _, methodName in ipairs(MethodList[tipType]) do
						-- prevent double hooking by checking HookedFrames table
						if (type(tooltip[methodName]) == "function") and (not _G.TipHooker.HookedFrames[name]) then
							_G.TipHooker.HookedFrames[name] = true
							hooksecurefunc(tooltip, methodName, Set[tipType])
						end
					end
					tinsert(_G.TipHooker.SupportedTooltips, tooltip)
					break
				end
	        end
		end
	end
end


------------------
-- OnEventFrame --
------------------
local OnEventFrame = CreateFrame("Frame")

OnEventFrame:RegisterEvent("VARIABLES_LOADED")
--OnEventFrame:RegisterEvent("PLAYER_LOGIN")

OnEventFrame:SetScript("OnEvent", function(self, event, ...)
	print(event)
	VariablesLoaded = true
	print("VariablesLoaded = true")
	-- Check for exsiting hooks
	for tipType in pairs(HandlerList) do
		InitializeHook(tipType)
	end
	hooksecurefunc("CreateFrame", CreateFrameHook)
end)

TipHooker.OnEventFrame = OnEventFrame


----------------
-- Activation --
----------------
-- Called when a newer version is registered
local function activate(self, oldLib)
	if not oldLib then
		print("not oldLib")
		-- HandlerList
		self.HandlerList = HandlerList
	else
		print("oldLib")
		oldLib.OnEventFrame:UnregisterAllEvents()
		oldLib.OnEventFrame:SetScript("OnEvent", nil)
		if oldLib.HandlerList then
			HandlerList = oldLib.HandlerList
		end
		self.HandlerList = HandlerList
	end
end


--[[---------------------------------
{	:Hook(handler, ...)
-------------------------------------
-- Description
	Hooks tooltip SetX methods with handler
-- Args
	handler
	    func - handler func
	...
	    string - list of tooltips that you want to hook:
	        "item": Items
	        "buff": Buff/Debuff
	        "spell": Spells
	        "talant": Talants
	        "unit": Units
	        "action": Action button
-- Examples
}
-----------------------------------]]
function TipHooker:Hook(handler, ...)
	for i = 1, select('#', ...) do
		local tipType = select(i, ...)
		print("TipHooker:Hook("..tipType..")")
		if VariablesLoaded then
			InitializeHook(tipType)
		end
		if not HandlerList[tipType] then
			HandlerList[tipType] = {}
		end
		HandlerList[tipType][handler] = true
	end
end

--[[---------------------------------
{	:Unhook(handler, ...)
-------------------------------------
-- Description
	Unhooks handler from tooltip SetX methods
-- Args
	handler
	    func - handler func
	...
	    string - list of tooltips that you want to hook:
	        "item": Items
	        "buff": Buff/Debuff
	        "spell": Spells
	        "talant": Talants
	        "unit": Units
	        "action": Action button
-- Examples
}
-----------------------------------]]
function TipHooker:Unhook(handler, ...)
	for i = 1, select('#', ...) do
		local tipType = select(i, ...)
		if HandlerList[tipType] then
			HandlerList[tipType][handler] = nil
		end
	end
end

--[[---------------------------------
{	:IsHooked(handler, tipType)
-------------------------------------
-- Description
	Unhooks handler from tooltip SetX methods
-- Args
	handler
	    func - handler func
	tipType
	    string - tooltip that you want to hook:
	        "item": Items
	        "buff": Buff/Debuff
	        "spell": Spells
	        "talant": Talants
	        "unit": Units
	        "action": Action button
-- Examples
}
-----------------------------------]]
function TipHooker:IsHooked(handler, tipType)
	if HandlerList[tipType] then
		return HandlerList[tipType][handler]
	end
end

AceLibrary:Register(TipHooker, MAJOR_VERSION, MINOR_VERSION, activate)

_G.TipHooker = AceLibrary("TipHooker-1.0")