commit from backup

Libraries/oUF/elements/qicon.lua

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+--[[ Element: Quest Icon
+
+ Handles updating and toggles visibility based upon the units connection to a
+ quest.
+
+ Widget
+
+ QuestIcon - Any UI widget.
+
+ Notes
+
+ The default quest icon will be used if the UI widget is a texture and doesn't
+ have a texture or color defined.
+
+ Examples
+
+   -- Position and size
+   local QuestIcon = self:CreateTexture(nil, 'OVERLAY')
+   QuestIcon:SetSize(16, 16)
+   QuestIcon:SetPoint('TOPRIGHT', self)
+   
+   -- Register it with oUF
+   self.QuestIcon = QuestIcon
+
+ Hooks
+
+ Override(self) - Used to completely override the internal update function.
+                  Removing the table key entry will make the element fall-back
+                  to its internal function again.
+]]
+
+local parent, ns = ...
+local oUF = ns.oUF
+
+local Update = function(self, event, unit)
+	if(unit ~= self.unit) then return end
+
+	local qicon = self.QuestIcon
+	if(qicon.PreUpdate) then
+		qicon:PreUpdate()
+	end
+
+	local isQuestBoss = UnitIsQuestBoss(unit)
+	if(isQuestBoss) then
+		qicon:Show()
+	else
+		qicon:Hide()
+	end
+
+	if(qicon.PostUpdate) then
+		return qicon:PostUpdate(isQuestBoss)
+	end
+end
+
+local Path = function(self, ...)
+	return (self.QuestIcon.Override or Update) (self, ...)
+end
+
+local ForceUpdate = function(element)
+	return Path(element.__owner, 'ForceUpdate', element.__owner.unit)
+end
+
+local Enable = function(self)
+	local qicon = self.QuestIcon
+	if(qicon) then
+		qicon.__owner = self
+		qicon.ForceUpdate = ForceUpdate
+
+		self:RegisterEvent('UNIT_CLASSIFICATION_CHANGED', Path)
+
+		if(qicon:IsObjectType'Texture' and not qicon:GetTexture()) then
+			qicon:SetTexture[[Interface\TargetingFrame\PortraitQuestBadge]]
+		end
+
+		return true
+	end
+end
+
+local Disable = function(self)
+	if(self.QuestIcon) then
+		self.QuestIcon:Hide()
+		self:UnregisterEvent('UNIT_CLASSIFICATION_CHANGED', Path)
+	end
+end
+
+oUF:AddElement('QuestIcon', Path, Enable, Disable)