Wait on ContinueOnItemLoad for inbox, panel and loot history items

The inbox package border now waits for the item to load, since another
player's item may not be cached. The panel and loot history drop their
cached branch: ContinueOnItemLoad runs at once for a cached item. The
swing timer reads the off-hand inventory type from the slot instead of
parsing the item link.

modules/loothistory.lua

@@ -209,23 +209,17 @@ pfUI:RegisterModule("loothistory", function ()
     local isExpanded = rollID and expanded[rollID]
     SetToggleTexture(f.toggle, isExpanded)
 
-    -- Item icon/name/quality via the ClassicAPI Item mixin. When the item
-    -- isn't cached yet, show a placeholder and re-paint this row from the
-    -- ContinueOnItemLoad callback (guarded on rollID: rows are pooled, so the
+    -- Item icon/name/quality via the ClassicAPI Item mixin. The row shows a
+    -- placeholder until ContinueOnItemLoad paints it, which happens at once
+    -- when the item is cached (guarded on rollID: rows are pooled, so the
     -- callback must no-op if the row has since been reused for another roll).
-    local item = itemLink and Item:CreateFromItemLink(itemLink)
-    if item and not item:IsItemEmpty() then
-      if item:IsItemDataCached() then
-        RenderItemVisual(f, item)
-      else
-        ShowRetrieving(f)
-        local pending = rollID
-        item:ContinueOnItemLoad(function()
-          if f.rollID == pending then RenderItemVisual(f, item) end
-        end)
-      end
-    else
-      ShowRetrieving(f)
+    ShowRetrieving(f)
+    if itemLink then
+      local item = Item:CreateFromItemLink(itemLink)
+      local pending = rollID
+      item:ContinueOnItemLoad(function()
+        if f.rollID == pending then RenderItemVisual(f, item) end
+      end)
     end
 
     -- winner summary only on a decided, collapsed row

modules/panel.lua

@@ -575,18 +575,12 @@ pfUI:RegisterModule("panel", function()
         blindpowder = 5530
       }
 
+      -- runs at once when the item is cached
       local function AddItemToPanel(panelType)
-        local itemID = itemIDs[panelType]
-          if C_Item.IsItemDataCachedByID(itemID) then
-            local itemName, count = C_Item.GetItemNameByID(itemID), C_Item.GetItemCount(itemID)
-            pfUI.panel:OutputPanel(panelType, itemName .. ": " .. count)
-          else
-            local item = Item:CreateFromItemID(itemID)
-            item:ContinueOnItemLoad(function()
-              local itemName, count = item:GetItemName(), C_Item.GetItemCount(item:GetItemID())
-              pfUI.panel:OutputPanel(panelType, itemName .. ": " .. count)
-            end)
-          end
+        local item = Item:CreateFromItemID(itemIDs[panelType])
+        item:ContinueOnItemLoad(function()
+          pfUI.panel:OutputPanel(panelType, item:GetItemName() .. ": " .. C_Item.GetItemCount(item:GetItemID()))
+        end)
       end
     
       local class = UnitClassBase('player')

modules/swingtimer.lua

@@ -258,12 +258,8 @@ pfUI:RegisterModule("swingtimer", function ()
   -- weapons (22); main-hand-only (21) can never sit there.
   local OH_WEAPON_TYPES = { [13]=true, [22]=true }
   local function HasOffhandWeapon()
-    local l = GetInventoryItemLink("player", 17)
-    if not l then return false end
-    local _, _, id = string.find(l, "item:(%d+)")
-    id = tonumber(id)
-    if not id then return false end
-    return OH_WEAPON_TYPES[C_Item.GetItemInventoryTypeByID(id)] == true
+    local invType = C_Item.GetItemInventoryType({ equipmentSlotIndex = INVSLOT_OFFHAND })
+    return OH_WEAPON_TYPES[invType] == true
   end
 
   local function UpdateWeaponSpeeds()

skins/blizzard/mail.lua

@@ -63,14 +63,19 @@ pfUI:RegisterSkin("Mailbox", function ()
       SkinButton(OpenMailPackageButton, nil, nil, nil, OpenMailPackageButtonIconTexture)
 
       hooksecurefunc("InboxFrame_OnClick", function(index)
+        OpenMailPackageButton:SetBackdropBorderColor(GetStringColor(pfUI_config.appearance.border.color))
+
+        -- another player's item may not be cached yet
         local _, itemID = GetInboxItemLink(index)
-        if itemID then
-          local quality = C_Item.GetItemQualityByID(itemID)
-          local r,g,b = GetItemQualityColor(quality)
-          OpenMailPackageButton:SetBackdropBorderColor(r,g,b,1)
-        else
-          OpenMailPackageButton:SetBackdropBorderColor(GetStringColor(pfUI_config.appearance.border.color))
-        end
+        if not itemID then return end
+        local item = Item:CreateFromItemID(itemID)
+        item:ContinueOnItemLoad(function()
+          local quality = item:GetItemQuality()
+          if quality and InboxFrame.openMailID == index then
+            local r,g,b = GetItemQualityColor(quality)
+            OpenMailPackageButton:SetBackdropBorderColor(r,g,b,1)
+          end
+        end)
       end)
     end