casts: route everything through C_Spell, drop libcast + libdebuff_casts

ClassicAPI's recent C_Spell additions cover remote-unit casts natively (SMSG_SPELL_START co-hook caching per caster GUID), so the two parallel cast trackers pfUI was running — libcast.lua and the libdebuff_casts table inside libdebuff.lua — can both retire. Migrations: - modules/castbar.lua: focus/player cast-info gathering reads C_Spell.UnitCastingInfo / UnitChannelInfo directly. Fallback ladder (libdebuff_casts → pfGetCastInfo → pfGetChannelInfo) collapses into a single call. Pushback handlers stop writing back into a non-existent cache; the local this.endTime is the source of truth. - modules/nameplates.lua: GetCastInfo(guid) now resolves to a unit token via UnitTokenFromGUID and queries C_Spell, returning the same compact struct shape downstream code expected. UpdateCastbar collapses from a three-branch hierarchy (dead IterDebuffs / libdebuff_casts / libcast) to one C_Spell read. - modules/afkcam.lua: pfGetCastInfo+pfGetChannelInfo round-trip becomes a single C_Spell.UnitCastingInfo("player") or UnitChannelInfo fallback. - libs/libpredict.lua: HealComm timing uses C_Spell on the sender's unit token after a small group-roster walk to resolve the sender's name. Deletions: - libs/libcast.lua entirely (-571 lines) plus its init/libs.xml entry. - libdebuff_casts / libdebuff_item_icons tables and their write sites in libs/libdebuff.lua (the SPELL_START_*, SPELL_GO_*, SPELL_FAILED_* event handlers stop maintaining them but keep firing the libdebuff_*_hooks broadcast surface for actionbar / swingtimer / libtotem). SPELLCAST_CHANNEL_STOP now reads the active channel from C_Spell.ChannelInfo. - modules/superwow.lua's supercast block — UNIT_CASTEVENT writes into libcast.db are redundant now that C_Spell co-hooks the same packet. - The cast-bar item-icon override that swapped in a potion/trinket icon for item-triggered casts. Spell icon stays; the item-icon metadata path (libdebuff_item_icons) went with libdebuff_casts. Steady Shot synthetic cast bar — Turtle WoW-specific: - castbar.lua gains a pfUI.synthetic_casts[unit] fallback that fires only when C_Spell returns nil, so abilities the engine treats as instant but which have a meaningful wait window can still render a cast bar. - modules/turtle-wow.lua replaces the old libcast.customcast block with a Nampower SPELL_QUEUE_EVENT subscriber. ON_SWING_QUEUED matching the localized "Steady Shot" name writes a 1.4s synthetic entry; ON_SWING_QUEUE_POPPED clears it; castbar's endMs guard self-expires the entry as a safety net. Note: haste scaling (libcast.ApplyShotHaste) is gone — bar may finish slightly early under +ranged haste buffs. Net: 152 insertions, 972 deletions.
2026-10-10 23:50:01 +00:00 · 2026-06-25 01:18:22 -05:00
parent d62a1222df
commit b79132b9f4
9 changed files with 152 additions and 972 deletions
@@ -151,9 +151,7 @@ pfUI:RegisterModule("afkcam", function ()
  delay:SetScript("OnUpdate", function()
    if ( this.tick or 0) > GetTime() then return else this.tick = GetTime() + 1 end

-    local name = UnitName("player")
-    local cast = pfGetCastInfo(name)
-    if not cast then cast = pfGetChannelInfo(name) end
+    local cast = C_Spell.UnitCastingInfo("player") or C_Spell.UnitChannelInfo("player")
    if not this.delay then this.delay = 0 end

    if cast then
@@ -103,60 +103,37 @@ pfUI:RegisterModule("castbar", function ()
      local query = this.unitstr ~= "" and this.unitstr or this.unitname
      if not query then return end

-      -- Check if we have a GUID-based focus (Turtle WoW native GUID)
-      local focusGuid = nil
-      if this.unitstr and string.find(this.unitstr, "^0x") then
-        focusGuid = this.unitstr
-      elseif this.unitstr and this.unitstr == "player" and UnitGUID then
-        focusGuid = UnitGUID("player")
-      elseif this.unitstr and this.unitstr ~= "player" then
-        local guid = UnitGUID(this.unitstr)
-        if guid then focusGuid = guid end
+      -- C_Spell takes a unit token; ClassicAPI's resolver also accepts GUID
+      -- strings, so this.unitstr can be "player" / "target" / "focus" or a
+      -- raw "0x..." GUID transparently.
+      local cast, nameSubtext, texture, startTime, endTime
+      local name, _, tex, startMs, endMs, _, _, _, spellID = C_Spell.UnitCastingInfo(query)
+      local isChan
+      if not name then
+        name, _, tex, startMs, endMs, _, _, spellID = C_Spell.UnitChannelInfo(query)
+        isChan = true
      end
-      this.focusGuid = focusGuid
-
-      -- Try libdebuff_casts first for GUID-based units (works with Turtle GUID + Nampower events)
-      local cast, nameSubtext, text, texture, startTime, endTime
-      local castBlocked = false
-      if focusGuid and pfUI.libdebuff_casts and pfUI.libdebuff_casts[focusGuid] then
-        local castData = pfUI.libdebuff_casts[focusGuid]
-        if castData.event == "CAST" or castData.event == "FAIL" then
-          castBlocked = true
-          pfUI.libdebuff_casts[focusGuid] = nil
-        elseif (castData.event == "START" or castData.event == "CHANNEL") and castData.endTime and castData.endTime > GetTime() then
-          cast = castData.spellName
-          texture = castData.icon
-          startTime = castData.startTime * 1000
-          endTime = castData.endTime * 1000
-          -- Try to get rank from spell DB via spellID (nameSubtext is not stored in libdebuff_casts)
-          if castData.spellID and GetSpellRecField then
-            nameSubtext = GetSpellRecField(castData.spellID, "rank") or ""
-          else
-            nameSubtext = ""
-          end
-          if castData.event == "CHANNEL" then
-            channel = cast
-          end
+      -- Synthetic fallback for abilities the engine treats as instant-cast but
+      -- that have a meaningful wait window (e.g. Turtle WoW Steady Shot on the
+      -- ranged-swing queue). Per-unit table populated by module-side hooks.
+      if not name and pfUI.synthetic_casts and pfUI.synthetic_casts[query] then
+        local s = pfUI.synthetic_casts[query]
+        if s.endMs > GetTime() * 1000 then
+          name, tex, startMs, endMs, spellID = s.name, s.icon, s.startMs, s.endMs, s.spellID
+          isChan = nil
        end
      end
-
-      local useLibcastForPlayer = this.unitstr == "player"
-
-      -- For player: use player name to query libcast.db directly
-      if not cast and useLibcastForPlayer then
-        query = UnitName("player")
-      end
-
-      -- Fallback: pfGetCastInfo only when no focusGuid (Nampower not available for this unit).
-      -- If we have a focusGuid, libdebuff is authoritative - don't fall back to libcast
-      -- even if no cast is active (prevents false positives e.g. spellbook clicks on CD spells).
-      if not cast and not castBlocked and not focusGuid and pfGetCastInfo then
-        cast, nameSubtext, text, texture, startTime, endTime, isTradeSkill = pfGetCastInfo(query)
-      end
-
-      if not cast and not castBlocked and not focusGuid and pfGetChannelInfo then
-        channel, nameSubtext, text, texture, startTime, endTime, isTradeSkill = pfGetChannelInfo(this.unitstr or this.unitname)
-        cast = channel
+      if name and startMs and endMs then
+        cast = name
+        texture = tex
+        startTime = startMs
+        endTime = endMs
+        if spellID and GetSpellRecField then
+          nameSubtext = GetSpellRecField(spellID, "rank") or ""
+        else
+          nameSubtext = ""
+        end
+        if isChan then channel = cast end
      end

      if cast then
@@ -181,35 +158,8 @@ pfUI:RegisterModule("castbar", function ()
            this.icon:Show()
            this.icon:SetHeight(size)
            this.icon:SetWidth(size)
-            
-            -- Override with item icon from libdebuff_casts or persistent item icon cache
-            local useTexture = texture
-            local useItemName = nil
-            if pfUI.libdebuff_casts or pfUI.libdebuff_item_icons then
-              local castGuid = nil
-              if this.unitstr and UnitExists then
-                local guid = UnitGUID(this.unitstr)
-                castGuid = guid
-              end
-              if castGuid then
-                -- First check active cast data
-                if pfUI.libdebuff_casts and pfUI.libdebuff_casts[castGuid] and pfUI.libdebuff_casts[castGuid].itemID then
-                  useTexture = pfUI.libdebuff_casts[castGuid].icon or texture
-                -- Fallback to persistent item icon cache
-                elseif pfUI.libdebuff_item_icons and pfUI.libdebuff_item_icons[castGuid] then
-                  useTexture = pfUI.libdebuff_item_icons[castGuid].icon or texture
-                  useItemName = pfUI.libdebuff_item_icons[castGuid].name
-                end
-              end
-            end
-            
-            this.icon.texture:SetTexture(useTexture)
+            this.icon.texture:SetTexture(texture)
            this.bar:SetPoint("TOPLEFT", this.icon, "TOPRIGHT", this.spacing, 0)
-            
-            -- Override spell name with item name for item-triggered casts
-            if useItemName and this.showname then
-              this.bar.left:SetText(useItemName .. " " .. rank)
-            end
          else
            this.bar:SetPoint("TOPLEFT", this, 0, 0)
            this.icon:Hide()
@@ -255,7 +205,6 @@ pfUI:RegisterModule("castbar", function ()
        this.lastMax = nil
        this.fadeout = 1
        this.delay = 0
-        this.itemIconApplied = nil
      end
    end)

@@ -267,10 +216,6 @@ pfUI:RegisterModule("castbar", function ()
      if not delayMs or delayMs <= 0 or not this.endTime then return end
      this.delay = (this.delay or 0) + delayMs / 1000
      this.endTime = this.endTime + delayMs
-      local focusGuid = this.focusGuid
-      if focusGuid and pfUI.libdebuff_casts and pfUI.libdebuff_casts[focusGuid] then
-        pfUI.libdebuff_casts[focusGuid].endTime = this.endTime / 1000
-      end
    end

    cb:RegisterEvent("SPELL_DELAYED_SELF")
@@ -299,10 +244,6 @@ pfUI:RegisterModule("castbar", function ()
        if diff > 50 then
          this.delay = (this.delay or 0) + diff / 1000
          this.endTime = newEndTime
-          local focusGuid = this.focusGuid
-          if focusGuid and pfUI.libdebuff_casts and pfUI.libdebuff_casts[focusGuid] then
-            pfUI.libdebuff_casts[focusGuid].endTime = newEndTime / 1000
-          end
        end

      elseif event == CASTBAR_EVENT_CAST_START or event == CASTBAR_EVENT_CHANNEL_START then
@@ -3,8 +3,6 @@ pfUI:RegisterModule("nameplates", function ()
  pcall(SetCVar, "ShowVKeyCastbar", 0)

  -- Local function references for performance
-  local pfGetCastInfo = pfGetCastInfo    -- provided by libcast for vanilla
-  local pfGetChannelInfo = pfGetChannelInfo  -- provided by libcast for vanilla
  local GetTime = GetTime
  local UnitExists = UnitExists
  local UnitName = UnitName
@@ -65,9 +63,30 @@ pfUI:RegisterModule("nameplates", function ()

  local raidGuidCache = {}  -- guid -> name (rebuilt on RAID_ROSTER_UPDATE/PARTY_MEMBERS_CHANGED)
  
-  -- Helper function to safely access libdebuff cast data
+  -- Resolve a plate GUID to its cast/channel info via C_Spell. Returns a
+  -- compact struct (spellName / icon / startTime / endTime / duration /
+  -- isChannel) or nil when the unit isn't casting / the GUID can't map to a
+  -- live token.
  local function GetCastInfo(guid)
-    return pfUI.libdebuff_casts and pfUI.libdebuff_casts[guid]
+    if not guid then return nil end
+    local unit = UnitTokenFromGUID(guid)
+    if not unit then return nil end
+    local name, _, texture, startMs, endMs, _, _, _, spellID = C_Spell.UnitCastingInfo(unit)
+    local isChannel
+    if not name then
+      name, _, texture, startMs, endMs, _, _, spellID = C_Spell.UnitChannelInfo(unit)
+      isChannel = true
+    end
+    if not name or not startMs or not endMs then return nil end
+    return {
+      spellName = name,
+      spellID   = spellID,
+      icon      = texture,
+      startTime = startMs / 1000,
+      endTime   = endMs / 1000,
+      duration  = (endMs - startMs) / 1000,
+      isChannel = isChannel,
+    }
  end
  
  local guidTargetTokenCache = {}  -- guid -> "<guid>target" interned string
@@ -245,15 +264,6 @@ pfUI:RegisterModule("nameplates", function ()
    return
  end

-  local function wipe(table)
-    if type(table) ~= "table" then
-      return
-    end
-    for k in pairs(table) do
-      table[k] = nil
-    end
-  end
-
  local function DisableObject(object)
    if not object then return end
    if not object.GetObjectType then return end
@@ -559,10 +569,6 @@ end
        if threatMemory[guid] then threatMemory[guid] = nil end
        if guidTargetTokenCache[guid] then guidTargetTokenCache[guid] = nil end
        if combatColorCache[guid] then combatColorCache[guid] = nil end
-        local castInfo = GetCastInfo(guid)
-        if castInfo and castInfo.endTime and castInfo.endTime < GetTime() then
-          if pfUI.libdebuff_casts then pfUI.libdebuff_casts[guid] = nil end
-        end
        local plate = C_NamePlate.GetNamePlateForUnit(arg1)
        if plate and plate.nameplate and plate.nameplate.cachedGuid == guid then
          plate.nameplate.cachedGuid = nil
@@ -1305,9 +1311,7 @@ end
    local isCastingNonTarget = not target and nameplate.castbar and nameplate.castbar:IsShown()
    if not isCastingNonTarget and not target and cfg.showcastbar and nameplate.cachedGuid then
      local castInfo = GetCastInfo(nameplate.cachedGuid)
-      if castInfo and castInfo.spellID and castInfo.endTime and castInfo.endTime > now then
-        isCastingNonTarget = true
-      elseif pfGetCastInfo and nameplate.castUpdate then
+      if castInfo and castInfo.endTime > now then
        isCastingNonTarget = true
      end
    end
@@ -1595,94 +1599,40 @@ end
  -- Shared castbar update logic (used by both dedicated frame and central loop)
  nameplates.UpdateCastbar = function(nameplate, now)
    if not nameplate or not nameplate.castbar then return end
-    local unitstr = nameplate.cachedGuid
-    local castInfo = unitstr and GetCastInfo(unitstr)
+    local castInfo = GetCastInfo(nameplate.cachedGuid)
+    if not castInfo or castInfo.endTime < now then
+      nameplate.castbar.isShown = nil
+      nameplate.castbar.lastEndTime = nil
+      nameplate.castbar:Hide()
+      return
+    end

-    if castInfo and castInfo.spellID then
-      if castInfo.startTime + castInfo.duration < now then
-        wipe(castInfo)
-        nameplate.castbar:Hide()
-      elseif castInfo.event == "CAST" or castInfo.event == "FAIL" then
-        wipe(castInfo)
-        nameplate.castbar:Hide()
-      else
-        -- Only update min/max, color and icon once per cast (when endTime changes)
-        local isChannel = castInfo.event == "CHANNEL"
-        local duration = castInfo.endTime - castInfo.startTime
-        if nameplate.castbar.lastEndTime ~= castInfo.endTime then
-          nameplate.castbar.lastEndTime = castInfo.endTime
-          nameplate.castbar.lastTextTick = nil
-          -- Use relative 0..duration range (same as castbar.lua) to avoid
-          -- floating-point precision loss with large absolute timestamps
-          nameplate.castbar:SetMinMaxValues(0, duration)
-          nameplate.castbar:SetStatusBarColor(strsplit(",", C.appearance.castbar[(isChannel and "channelcolor" or "castbarcolor")]))
-          if castInfo.icon then
-            nameplate.castbar.icon.tex:SetTexture(castInfo.icon)
-            nameplate.castbar.icon.tex:SetTexCoord(.1,.9,.1,.9)
-          end
-          if cfg.spellname then
-            nameplate.castbar.spell:SetText(castInfo.spellName)
-          else
-            nameplate.castbar.spell:SetText("")
-          end
-        end
-        local barValue
-        if isChannel then
-          barValue = castInfo.endTime - now
-        else
-          barValue = now - castInfo.startTime
-        end
-        barValue = barValue < 0 and 0 or barValue
-        barValue = barValue > duration and duration or barValue
-        nameplate.castbar:SetValue(barValue)
-        SetCastbarText(nameplate.castbar, castInfo.endTime - now)
-        if not nameplate.castbar.isShown then nameplate.castbar.isShown = true; nameplate.castbar:Show() end
+    local isChannel = castInfo.isChannel
+    local duration = castInfo.duration
+    if nameplate.castbar.lastEndTime ~= castInfo.endTime then
+      nameplate.castbar.lastEndTime = castInfo.endTime
+      nameplate.castbar.lastTextTick = nil
+      -- Relative 0..duration range to avoid float precision loss with large
+      -- absolute timestamps.
+      nameplate.castbar:SetMinMaxValues(0, duration)
+      nameplate.castbar:SetStatusBarColor(strsplit(",", C.appearance.castbar[(isChannel and "channelcolor" or "castbarcolor")]))
+      if castInfo.icon then
+        nameplate.castbar.icon.tex:SetTexture(castInfo.icon)
+        nameplate.castbar.icon.tex:SetTexCoord(.1,.9,.1,.9)
      end
-    else
-      -- libcast fallback (vanilla without Nampower)
-      if unitstr and pfGetCastInfo then
-        local cast, _, _, texture, startTime, endTime = pfGetCastInfo(unitstr)
-        local channel
-        if not cast then
-          channel, _, _, texture, startTime, endTime = pfGetChannelInfo(unitstr)
-        end
-        if cast or channel then
-          local effect = cast or channel
-          local duration = endTime - startTime
-          local max = duration / 1000
-          local cur = now - startTime / 1000
-          if channel then cur = max + startTime / 1000 - now end
-          if cur < 0 then cur = 0 end
-          if cur > max then cur = max end
-          if nameplate.castbar.lastEndTime ~= endTime then
-            nameplate.castbar.lastEndTime = endTime
-            nameplate.castbar.lastTextTick = nil
-            nameplate.castbar:SetMinMaxValues(0, max)
-            nameplate.castbar:SetStatusBarColor(strsplit(",", C.appearance.castbar[(channel and "channelcolor" or "castbarcolor")]))
-            if texture then
-              nameplate.castbar.icon.tex:SetTexture(texture)
-              nameplate.castbar.icon.tex:SetTexCoord(.1, .9, .1, .9)
-            end
-            if cfg.spellname then
-              nameplate.castbar.spell:SetText(effect)
-            else
-              nameplate.castbar.spell:SetText("")
-            end
-          end
-          nameplate.castbar:SetValue(cur)
-          SetCastbarText(nameplate.castbar, channel and cur or (max - cur))
-          if not nameplate.castbar.isShown then nameplate.castbar.isShown = true; nameplate.castbar:Show() end
-        else
-          nameplate.castbar.isShown = nil
-          nameplate.castbar.lastEndTime = nil
-          nameplate.castbar:Hide()
-        end
+      if cfg.spellname then
+        nameplate.castbar.spell:SetText(castInfo.spellName)
      else
-        nameplate.castbar.isShown = nil
-        nameplate.castbar.lastEndTime = nil
-        nameplate.castbar:Hide()
+        nameplate.castbar.spell:SetText("")
      end
    end
+
+    local barValue = isChannel and (castInfo.endTime - now) or (now - castInfo.startTime)
+    if barValue < 0 then barValue = 0 end
+    if barValue > duration then barValue = duration end
+    nameplate.castbar:SetValue(barValue)
+    SetCastbarText(nameplate.castbar, castInfo.endTime - now)
+    if not nameplate.castbar.isShown then nameplate.castbar.isShown = true; nameplate.castbar:Show() end
  end

  -- Dedicated frame that updates ONLY the target plate castbar.
@@ -174,102 +174,4 @@ pfUI:RegisterModule("superwow", function ()
    end
  end

-  -- Enhance libcast with SuperWoW data for NPCs and other players
-  -- Player casts use SPELLCAST_* events for proper pushback handling
-  local supercast = CreateFrame("Frame")
-  local playerGuid = nil
-
-  supercast:RegisterEvent("PLAYER_ENTERING_WORLD")
-  supercast:RegisterEvent("UNIT_CASTEVENT")
-  supercast:RegisterEvent("PLAYER_LOGOUT")
-  supercast:SetScript("OnEvent", function()
-    -- Handle shutdown to prevent crash 132
-    if event == "PLAYER_LOGOUT" then
-      this:UnregisterAllEvents()
-      this:SetScript("OnEvent", nil)
-      return
-    end
-
-    if event == "PLAYER_ENTERING_WORLD" then
-      -- Cache player GUID
-      if UnitExists then
-        local guid = UnitGUID("player")
-        playerGuid = guid
-      end
-      return
-    end
-
-    local guid = arg1
-    local isPlayer = guid == playerGuid
-    
-    -- For non-player units: disable combat parsing events (one-time init)
-    if not isPlayer and not supercast.init then
-      -- disable combat parsing events in superwow mode (for non-player units)
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_SELF_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_HOSTILEPLAYER_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_HOSTILEPLAYER_BUFF")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_FRIENDLYPLAYER_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_FRIENDLYPLAYER_BUFF")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_HOSTILEPLAYER_BUFFS")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_FRIENDLYPLAYER_BUFFS")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_HOSTILEPLAYER_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_FRIENDLYPLAYER_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_SELF_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PARTY_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PARTY_BUFF")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_PARTY_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_PARTY_BUFFS")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_CREATURE_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_PERIODIC_CREATURE_BUFFS")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_CREATURE_VS_CREATURE_DAMAGE")
-      libcast:UnregisterEvent("CHAT_MSG_SPELL_CREATURE_VS_CREATURE_BUFF")
-      supercast.init = true
-    end
-
-    if arg3 == "START" or arg3 == "CAST" or arg3 == "CHANNEL" then
-      local target = arg2
-      local event_type = arg3
-      local spell_id = arg4
-      local timer = arg5
-
-      local spell = C_Spell.GetSpellName(spell_id) or UNKNOWN
-      local icon = C_Spell.GetSpellTexture(spell_id) or "Interface\\Icons\\INV_Misc_QuestionMark"
-
-      -- skip on buff procs during cast
-      if event_type == "CAST" then
-        if not libcast.db[guid] or libcast.db[guid].cast ~= spell then
-          -- ignore casts without 'START' event, while there is already another cast.
-          -- those events can be for example a frost shield proc while casting frostbolt.
-          -- we want to keep the cast itself, so we simply skip those.
-          return
-        end
-      end
-
-      -- For player: store in libcast.db[playerName] so pushback tracking works
-      -- For others: store by GUID
-      local dbKey = isPlayer and UnitName("player") or guid
-      
-      -- add cast action to the database
-      if not libcast.db[dbKey] then libcast.db[dbKey] = {} end
-      libcast.db[dbKey].cast = spell
-      libcast.db[dbKey].rank = nil
-      libcast.db[dbKey].start = GetTime()
-      libcast.db[dbKey].casttime = timer or 0
-      libcast.db[dbKey].icon = icon
-      libcast.db[dbKey].channel = event_type == "CHANNEL" or false
-    elseif arg3 == "FAIL" then
-      -- For player: use playerName, for others: use GUID
-      local dbKey = isPlayer and UnitName("player") or guid
-      
-      -- delete all cast entries
-      if libcast.db[dbKey] then
-        libcast.db[dbKey].cast = nil
-        libcast.db[dbKey].rank = nil
-        libcast.db[dbKey].start = nil
-        libcast.db[dbKey].casttime = nil
-        libcast.db[dbKey].icon = nil
-        libcast.db[dbKey].channel = nil
-      end
-    end
-  end)
 end)
@@ -312,42 +312,41 @@ pfUI:RegisterModule("turtle-wow", function ()
    end
  end)

-  -- add Trueshot recognition to to custom castbars.
-  if not libcast.customcast["steadyshot"] then
-    -- add trueshot to pfUI's custom casts
-    local player = UnitName("player")
+  -- Synthetic Steady Shot cast bar. The engine treats Steady Shot as
+  -- instant, but the arrow doesn't actually fire until the next ranged
+  -- swing (~1.4s baseline). Drive a synthetic entry off Nampower's
+  -- SPELL_QUEUE_EVENT so hunters see a tickdown matching the swing wait.
+  -- castbar.lua reads pfUI.synthetic_casts[unit] as a fallback when
+  -- C_Spell.UnitCastingInfo returns nil.
+  pfUI_locale["enUS"]["customcast"]["TRUESHOT"] = "Steady Shot"
+  pfUI_locale["zhCN"]["customcast"]["TRUESHOT"] = "稳固射击"
+  pfUI.synthetic_casts = pfUI.synthetic_casts or {}

-    -- add locales
-    pfUI_locale["enUS"]["customcast"]["TRUESHOT"] = "Steady Shot"
-    pfUI_locale["zhCN"]["customcast"]["TRUESHOT"] = "稳固射击"
-    local trueshot = L["customcast"]["TRUESHOT"] or ""
+  local steadyShotName = L["customcast"]["TRUESHOT"]
+  local STEADY_SHOT_ICON = "Interface\\Icons\\Ability_hunter_steadyshot"
+  local STEADY_SHOT_DURATION_MS = 1400  -- not haste-scaled; close enough for the visual cue
+  local ON_SWING_QUEUED, ON_SWING_QUEUE_POPPED = 0, 1

-    libcast.customcast[strlower(trueshot)] = function(begin, duration)
-      if begin then
-        -- cast time is 1sec, however it takes 1.4sec to fire in average
-        local duration = libcast.ApplyShotHaste(duration or 1400)
-
-        local _,_, lag = GetNetStats()
-        local start = GetTime() + lag/1000
-
-        -- add cast action to the database
-        libcast.db[player].cast = trueshot
-        libcast.db[player].rank = lastrank
-        libcast.db[player].start = start
-        libcast.db[player].casttime = duration
-        libcast.db[player].icon = "Interface\\Icons\\Ability_hunter_steadyshot"
-        libcast.db[player].channel = nil
-      else
-        -- remove cast action to the database
-        libcast.db[player].cast = nil
-        libcast.db[player].rank = nil
-        libcast.db[player].start = nil
-        libcast.db[player].casttime = nil
-        libcast.db[player].icon = nil
-        libcast.db[player].channel = nil
-      end
+  local steadyShot = CreateFrame("Frame")
+  steadyShot:RegisterEvent("SPELL_QUEUE_EVENT")
+  steadyShot:SetScript("OnEvent", function()
+    if event ~= "SPELL_QUEUE_EVENT" then return end
+    local eventCode, spellId = arg1, arg2
+    if eventCode ~= ON_SWING_QUEUED and eventCode ~= ON_SWING_QUEUE_POPPED then return end
+    if C_Spell.GetSpellName(spellId) ~= steadyShotName then return end
+    if eventCode == ON_SWING_QUEUED then
+      local now = GetTime() * 1000
+      pfUI.synthetic_casts["player"] = {
+        name    = steadyShotName,
+        icon    = STEADY_SHOT_ICON,
+        startMs = now,
+        endMs   = now + STEADY_SHOT_DURATION_MS,
+        spellID = spellId,
+      }
+    else
+      pfUI.synthetic_casts["player"] = nil
    end
-  end
+  end)

  -- add skin to twow's talent inspect frame
  if pfUI.skin["Inspect"] and pfUI_config["disabled"]["skin_Inspect"] ~= "1" then