I added trinket support if that interests you.

Line 652 of options.lua replace it with

set = function(_, newValue) if (tonumber(newValue)) then Watcher:AddNewSpell(tonumber(newValue)); else sname, _, _, _, _, _, spellId = GetSpellInfo(newValue); if (spellId) then Watcher:AddNewSpell(spellId); elseif (IsEquippedItem(newValue)) then itemID = GetItemInfoInstant(newValue); Watcher:AddNewSpell(itemID); end end end,

On line 275 of filters.lua replace the return with

		if (not IsEquippedItem(GetItemInfo(spellId))) then
			return;
		end

Just under it at the new line 282 add between the 2 local variables

	if (IsEquippedItem(GetItemInfo(spellId))) then
		startTime, duration, enable = GetItemCooldown(spellId);
	end

On line 709 of core.lua replace the line with

 if (spellId and tonumber(spellId) and (spellId > 0) and ((not IsPassiveSpell(spellId)) or IsEquippedItem(GetItemInfo(spellId)))) then

and then down on the next function at line 732 replace line 732-740 with

	if (IsEquippedItem(GetItemInfo(spellId))) then
		spellName = GetItemInfo(spellId)
	else
		-- if don't have the spellName, it's probably a talent
		if (not spellName) then
			spellName = self:GetTalentNameById(spellId);

			-- not a talent? just give them the spellID
			if (not spellName) then
				spellName = ""..spellId;
			end
		end
	end

Now finally at line 534 of Display.lua add

		if (IsEquippedItem(GetItemInfo(spellId))) then
			local _, _, _, _, _, _, _, _, _, itemIcon = GetItemInfo(spellId)
			texture = itemIcon
		end	

In reply to x3mpinoy99:

 I found DOTs to be tricky, what I do is create 2 filter sets, 

One checks if the aura exists and I track remaining time when below 0

The other just tracks if the aura does not exist. Then on your priority list you put both. That way you have one to cover you if the debuff falls off, and one that shows while the DOT is ticking, neither shows when the other does.

["auraType"] = "HARMFUL",
["playerIsCaster"] = true,
["auraName"] = "Shadow Word: Pain",
["unit"] = "target",
["remainingTimeRelationship"] = "BELOW",
["filterType"] = "auras",
["ifExists"] = false,
["trackStacks"] = false,
["stackCount"] = 0,
["remainingTime"] = 16,
["stackRelationship"] = "At Least",
["trackRemainingTime"] = false,

["auraType"] = "HARMFUL",
["playerIsCaster"] = true,
["auraName"] = "Shadow Word: Pain",
["unit"] = "target",
["remainingTimeRelationship"] = "BELOW",
["filterType"] = "auras",
["ifExists"] = true,
["trackStacks"] = false,
["stackCount"] = 0,
["remainingTime"] = 0,
["stackRelationship"] = "At Least",
["trackRemainingTime"] = true,

Hey Jordy, I just wanted to pass on an issue I came across last night.

Anyway last night for my Havoc Demon Hunter we have Metamorphosis spellID 191427 which triggers the buff/aura Metamorphosis spellID 162264.

If you check out the latter version, you can see that it converts your Chaos Strike to Annihilation, and coverts your Blade Dance to Death Sweep. Well the first part of the problem is in watcher, when those conversions happen while in Metamorphosis, Chaos Strike and Blade Dance both still show up on watcher even though it shouldn't be "usable". Those abilities don't even appear on the bar anymore but whatever, let's just make some rules to prevent blade dance and chaos strike from appearing if the metamorphosis buff is present. Well that was the first problem, now this brings me to the 2nd problem. For whatever reason Watcher just couldn't detect my Metamorphosis. I typed up a script to check my buffs in case it's called something different...

/script for i=1,40 do local name, _, _, _, _, _,_, _, _, spellId, _, _, _, _, _, _, _ = UnitBuff("Player", i) if spellId ~= Nil then print(name..": "..spellId) end end

Nope, just shows up as Metamorphosis. 

In reply to elidion:

In reply to elidion:

for priorityNum, spellCondition in ipairs(priorityList.spellConditions) do
 local icon = nil;
 if (self.SpellConditionCache[priorityNum]) then
  icon = self.SpellConditionCache[priorityNum];
 else
  icon = self:GetNextAvailableIcon();
 end
 if (not Watcher.replacedSpellsCache[spellCondition.spellId] and self:CheckForFilterType(spellCondition.filterSetId, filterType)) then
  local filterEndTime, results = self:EvaluateSpellFilter(spellCondition.spellId, spellCondition.filterSetId, filterType);
  if (not self.filterTypeEvaluateCache[priorityNum]) then
   self.filterTypeEvaluateCache[priorityNum] = {};
  end
  self.filterTypeEvaluateCache[priorityNum][filterType] = results[filterType];
  local cachedEndTime = 0;
  for filterId, filter in pairs(self.db.char.filterSets[spellCondition.filterSetId].filters) do
   if (not self.filterTypeEvaluateCache[priorityNum][filter.filterType] or not self.filterTypeEvaluateCache[priorityNum][filter.filterType][filterId]) then
    cachedEndTime = nil;
    break;
   end
   cachedEndTime = math.max(cachedEndTime, self.filterTypeEvaluateCache[priorityNum][filter.filterType][filterId]);
  end
  self:UpdateIcon(icon, spellCondition.spellId, priorityNum, cachedEndTime);
 elseif (Watcher.replacedSpellsCache[spellCondition.spellId]) then
  self:ClearIcon(icon);
 end
end