backdrop api: rework every single frame sizing

This commit breaks alot of compatibility and maybe
other things too. The change was necessary, because
the old framework ran up against its limits.
A lot of new configuration options are now possible
and some of them were already added.

pfUI.lua

@@ -19,7 +19,6 @@ end
 
 pfUI = CreateFrame("Frame",nil,UIParent)
 pfUI:RegisterEvent("ADDON_LOADED")
---pfUI:RegisterEvent("PLAYER_ENTERING_WORLD")
 
 -- initialize default variables
 pfUI.cache = {}
@@ -36,15 +35,6 @@ pfLocaleSpellEvents = {}
 pfLocaleSpellInterrupts = {}
 
 pfUI:SetScript("OnEvent", function()
-  pfUI.cache["locale"] = GetLocale()
-  if pfUI.cache["locale"] ~= "enUS" and
-     pfUI.cache["locale"] ~= "frFR" and
-     pfUI.cache["locale"] ~= "deDE" and
-     pfUI.cache["locale"] ~= "zhCN" and
-     pfUI.cache["locale"] ~= "ruRU" then
-     pfUI.cache["locale"] = "enUS"
-  end
-
   if not pfUI_init then
     pfUI_init = {}
   end
@@ -55,6 +45,16 @@ pfUI:SetScript("OnEvent", function()
   pfUI.environment:UpdateFonts()
   pfUI.environment:UpdateColors()
 
+  -- fill the cache
+  pfUI.cache["locale"] = GetLocale()
+  if pfUI.cache["locale"] ~= "enUS" and
+     pfUI.cache["locale"] ~= "frFR" and
+     pfUI.cache["locale"] ~= "deDE" and
+     pfUI.cache["locale"] ~= "zhCN" and
+     pfUI.cache["locale"] ~= "ruRU" then
+     pfUI.cache["locale"] = "enUS"
+  end
+
   if arg1 == "pfUI" then
     for i,m in pairs(this.modules) do
       -- do not load disabled modules
@@ -65,6 +65,8 @@ pfUI:SetScript("OnEvent", function()
       end
     end
   end
+
+
 end)
 
 function pfUI:RegisterModule(n, f)
@@ -73,15 +75,14 @@ function pfUI:RegisterModule(n, f)
 end
 
 pfUI.backdrop = {
-  bgFile = "Interface\\AddOns\\pfUI\\img\\bg", tile = true, tileSize = 8,
+  bgFile = "Interface\\AddOns\\pfUI\\img\\col", tile = true, tileSize = 8,
   edgeFile = "Interface\\AddOns\\pfUI\\img\\border", edgeSize = 8,
-  insets = {left = 0, right = 0, top = 0, bottom = 0},
+  insets = {left = -1, right = -1, top = -1, bottom = -1},
 }
 
-pfUI.backdrop_col = {
-  bgFile = "Interface\\AddOns\\pfUI\\img\\bg", tile = true, tileSize = 8,
-  edgeFile = "Interface\\AddOns\\pfUI\\img\\border_col", edgeSize = 8,
-  insets = {left = 0, right = 0, top = 0, bottom = 0},
+pfUI.backdrop_small = {
+  bgFile = "Interface\\AddOns\\pfUI\\img\\col", tile = true, tileSize = 8,
+  insets = {left = -1, right = -1, top = -1, bottom = -1},
 }
 
 pfUI.backdrop_underline = {
@@ -111,6 +112,62 @@ function pfUI.utils:UpdateMovable(frame)
   end
 end
 
+function pfUI.utils:CreateBackdrop(f, inset, legacy, transp)
+  -- use default inset if nothing is given
+  local border = inset
+  if not border then
+    border = tonumber(pfUI_config.appearance.border.default)
+  end
+
+  -- bg and edge colors
+  if not pfUI.cache.br then
+    local br, bg, bb, ba = strsplit(",", pfUI_config.appearance.border.background)
+    local er, eg, eb, ea = strsplit(",", pfUI_config.appearance.border.color)
+    pfUI.cache.br, pfUI.cache.bg, pfUI.cache.bb, pfUI.cache.ba = br, bg, bb, ba
+    pfUI.cache.er, pfUI.cache.eg, pfUI.cache.eb, pfUI.cache.ea = er, eg, eb, ea
+  end
+
+  local br, bg, bb, ba =  pfUI.cache.br, pfUI.cache.bg, pfUI.cache.bb, pfUI.cache.ba
+  local er, eg, eb, ea = pfUI.cache.er, pfUI.cache.eg, pfUI.cache.eb, pfUI.cache.ea
+  if transp then ba = .8 end
+
+  -- use legacy backdrop handling
+  if legacy then
+    f:SetBackdrop(pfUI.backdrop)
+    f:SetBackdropColor(br, bg, bb, ba)
+    f:SetBackdropBorderColor(er, eg, eb , ea)
+    return
+  end
+
+  -- use new backdrop behaviour
+  if not f.backdrop then
+    f:SetBackdrop(nil)
+
+    local border = tonumber(border) - 1
+    local backdrop = pfUI.backdrop
+    if border < 1 then backdrop = pfUI.backdrop_small end
+  	local b = CreateFrame("Frame", nil, f)
+  	b:SetPoint("TOPLEFT", f, "TOPLEFT", -border, border)
+  	b:SetPoint("BOTTOMRIGHT", f, "BOTTOMRIGHT", border, -border)
+
+    local level = f:GetFrameLevel()
+    if level < 1 then
+  	  --f:SetFrameLevel(level + 1)
+      b:SetFrameLevel(level)
+    else
+      b:SetFrameLevel(level - 1)
+    end
+
+    f.backdrop = b
+    b:SetBackdrop(backdrop)
+  end
+
+  local b = f.backdrop
+  b:SetBackdropColor(br, bg, bb, ba)
+  b:SetBackdropBorderColor(er, eg, eb , ea)
+end
+
+
 message = function (msg)
   DEFAULT_CHAT_FRAME:AddMessage("|cffcccc33INFO: |cffffff55"..msg)
 end
@@ -147,8 +204,7 @@ function pfUI.info:ShowInfoBox(text, time, parent, height)
 
   pfUI.info:SetWidth(pfUI.info.text:GetStringWidth() + 50)
   pfUI.info:SetHeight(height)
-  pfUI.info:SetBackdrop(pfUI.backdrop)
-  pfUI.info:SetBackdropColor(0,0,0,.75)
+  pfUI.utils:CreateBackdrop(pfUI.info)
   pfUI.info:SetPoint("TOP", 0, -25)
 
   pfUI.info.timeout:ClearAllPoints()