Rework square indicators

- The indicator will grab a frame from a pool
 - Having a frame, it now uses a real border/edge
 - There is a stacks number that can optionally be enabled

src/types/indicators/squareindicator.lua

@@ -17,6 +17,8 @@
 local omi = select(2, ...)
 local types = omi.GetModule("types")
 
+local squarePool = CreateFramePool("Frame", nil, "BackdropTemplate")
+
 ---SquareIndicator is an indicator that displays a colored square texture
 ---@class SquareIndicator: Indicator
 local SquareIndicator = types.CreateClass("SquareIndicator", Indicator)
@@ -36,33 +38,90 @@ end
 -- point        Attachment point to the unitframe's overlay frame
 -- x, y         x and y offset for the attachment point
 -- color        Color of the square
-function SquareIndicator:Init(unitframe, size, point, x, y, color)
-    local frame = unitframe.overlays
-
-    local texture = frame:CreateTexture(nil, "ARTWORK")
-    self.texture = texture
-    texture:Hide()
-    texture:SetTexture("Interface\\Addons\\OmicronFrames\\media\\textures\\square_b")
-    texture:SetSize(size, size)
-    texture:SetPoint(point, x, y)
-    self:SetColor(color)
-    texture:SetVertexColor(unpack(color))
-    texture:SetDrawLayer("ARTWORK")
+---@param unitframe UnitFrame
+---@param size number
+---@param point string
+---@param x number
+---@param y number
+---@param color number[]
+---@param showStacks boolean
+function SquareIndicator:Init(unitframe, size, point, x, y, color, showStacks)
+    self.unitframe = unitframe
+    self.frameParent = unitframe.overlays
+    self.size = size
+    self.point = point
+    self.x = x
+    self.y = y
+    self.color = color
+    self.showStacks = showStacks
 end
 
 --- Set the color of the Square Indicator
 -- color: a sequence table with 3 color channels {r, g, b}
 function SquareIndicator:SetColor(color)
-    self.texture:SetVertexColor(unpack(color))
+    self.color = color
+    local frame = self.frame
+    if frame  then
+        frame:SetBackdropColor(unpack(color))
+    end
 end
 
 --- Show the square indicator.
----@param data table|nil
+---@param data table
 function SquareIndicator:Show(data)
-    self.texture:Show()
+    local frame, stacks = self:GetFrame()
+    local numStacks = data.stacks or 0
+    self.frame = frame
+    self.stacks = stacks
+    if self.showStacks and numStacks > 0 then
+        stacks:SetText(numStacks)
+        stacks:Show()
+    end
+    frame:SetBackdropColor(unpack(self.color))
+    frame:Show()
+end
+
+function SquareIndicator:GetFrame()
+    local frame, new = squarePool:Acquire()
+    local stacks
+    if new then
+        frame.backdropInfo = {
+            bgFile = "Interface\\Addons\\OmicronFrames\\media\\textures\\square_white",
+            edgeFile = "Interface\\Addons\\OmicronFrames\\media\\textures\\pixel_edge",
+            edgeSize = 2,
+            insets = {left=0, right=0, top=0, bottom=0},
+        }
+        frame:ApplyBackdrop()
+
+        stacks = frame:CreateFontString(nil, "OVERLAY")
+        frame.stacks = stacks
+        stacks:SetFont("Interface\\AddOns\\OmicronFrames\\media\\fonts\\roboto\\Roboto-Medium.ttf", 12, "OUTLINE")
+        stacks:SetPoint("CENTER")
+        stacks:SetTextColor(1, 1, 1)
+    end
+
+    frame:SetSize(self.size, self.size)
+    frame:SetParent(self.frameParent)
+    frame:SetPoint(self.point, self.x, self.y)
+    frame:SetBackdropBorderColor(0, 0, 0, 1)
+    stacks = frame.stacks
+    return frame, stacks
+end
+
+---@param data table
+function SquareIndicator:Update(data)
+    local numStacks = data.stacks or 0
+    if numStacks > 0 then
+        self.stacks:SetText(numStacks)
+        self.stacks:Show()
+    end
 end
 
 --- Hide the square indicator.
 function SquareIndicator:Hide()
-    self.texture:Hide()
+    local frame = self.frame
+    self.stacks:Hide()
+    self.frame = nil
+    self.stacks = nil
+    squarePool:Release(frame)
 end