Test hover against the hit rect, not the bare frame rect

CreateBackdrop widens a frame's hit rect by the border, so mouse focus
and OnEnter/OnLeave cover a band that plain MouseIsOver reports as
outside. Add MouseIsOverHitRect, which passes the frame's hit rect
insets as MouseIsOver offsets, and use it at the unpadded call sites.
The XP bar's hover text follows the same OnEnter/OnLeave flag as its
fade.

api/api.lua

@@ -1543,6 +1543,18 @@ function pfUI.api.BarButtonAnchor(button,basename,buttonindex,barsize,formfactor
   return button._anchor
 end
 
+-- [ MouseIsOverHitRect ] --
+-- Like MouseIsOver, but tests the frame's hit rect, the area the engine
+-- uses for mouse focus and OnEnter/OnLeave. CreateBackdrop widens that
+-- rect by the border, so plain MouseIsOver misses a band around the frame.
+-- 'frame'      the frame to test
+-- return       true when the cursor is inside the frame's hit rect
+function pfUI.api.MouseIsOverHitRect(frame)
+  if not frame.GetHitRectInsets then return MouseIsOver(frame) end
+  local left, right, top, bottom = frame:GetHitRectInsets()
+  return MouseIsOver(frame, -top, bottom, left, -right)
+end
+
 -- [ Enable Autohide ] --
 -- 'frame'  the frame that should be hidden
 function pfUI.api.EnableAutohide(frame, timeout, combat)

api/ui-widgets.lua

@@ -661,7 +661,7 @@ function pfUI.api.SkinButton(button, cr, cg, cb, icon, disableHighlight)
   end
 
   b.UnlockHighlight = function()
-    if not MouseIsOver(b) then
+    if not MouseIsOverHitRect(b) then
       b:SetBackdropBorderColor(GetStringColor(pfUI_config.appearance.border.color))
     end
     b.locked = false
@@ -1175,7 +1175,7 @@ function pfUI.api.CreateInfoBox(text, time, parent, height)
 
       if GetTime() > infobox.lastshow + infobox.duration then
         if not infobox.fade:IsPlaying() then infobox.fade:Play() end
-      elseif MouseIsOver(this) then
+      elseif MouseIsOverHitRect(this) then
         this:SetAlpha(max(0.4, this:GetAlpha() - .1))
       else
         this:SetAlpha(min(1, this:GetAlpha() + .1))

modules/actionbar.lua

@@ -317,7 +317,7 @@ pfUI:RegisterModule("actionbar", function ()
     -- handle button highlight
     if keystate == "down" then
       self.highlight:Show()
-    elseif not MouseIsOver(self) then
+    elseif not MouseIsOverHitRect(self) then
       self.highlight:Hide()
     end
   end

modules/equipmentmanager.lua

@@ -176,8 +176,8 @@ pfUI:RegisterModule("equipmentmanager", function()
   rowMenu:RegisterEvent("GLOBAL_MOUSE_DOWN")
   rowMenu:SetScript("OnEvent", function()
     if not this:IsShown() then return end
-    if MouseIsOver(this) then return end
+    if MouseIsOverHitRect(this) then return end
-    if this.anchorBtn and MouseIsOver(this.anchorBtn) then return end
+    if this.anchorBtn and MouseIsOverHitRect(this.anchorBtn) then return end
     this:Hide()
   end)
   tinsert(UISpecialFrames, "pfEqMgrRowMenu")  -- Escape closes it
@@ -313,10 +313,10 @@ pfUI:RegisterModule("equipmentmanager", function()
 
     -- Show the gear and tooltip while the cursor is over the row or its
     -- gear child. The gear sits inside the row's rectangle, so a single
-    -- MouseIsOver(row) check covers both. OnLeave on the row and the gear
+    -- MouseIsOverHitRect(row) check covers both. OnLeave on the row and the
-    -- catches every exit path, so no OnUpdate poll is needed.
+    -- gear catches every exit path, so no OnUpdate poll is needed.
     local function HideRowHover()
-      if MouseIsOver(row) then return end
+      if MouseIsOverHitRect(row) then return end
       GameTooltip:Hide()
       row.gear:Hide()
     end

modules/gui.lua

@@ -58,10 +58,11 @@ pfUI:RegisterModule("gui", function ()
         return
       end
 
-      if MouseIsOver(this) and not this.over then
+      local over = MouseIsOverHitRect(this)
+      if over and not this.over then
         this.tex:Show()
         this.over = true
-      elseif not MouseIsOver(this) and this.over then
+      elseif not over and this.over then
         this.tex:Hide()
         this.over = nil
       end

modules/xpbar.lua

@@ -191,7 +191,7 @@ end
     local self = self or this
 
     if self.text_mouse == "1" then
-      self.bar.text:SetShown(MouseIsOver(self))
+      self.bar.text:SetShown(self.hover)
     end
 
     if self.always then return end