From 0e2303ae1e1e54abf1aa4ca999066cf0fad602ad Mon Sep 17 00:00:00 2001
From: shagu <ericmauser@googlemail.com>
Date: Sun, 30 Sep 2018 13:44:03 +0200
Subject: [PATCH] libs: skip library loading if already existing

---
 libs/libcast.lua    | 3 +++
 libs/librange.lua   | 5 ++++-
 libs/libspell.lua   | 3 +++
 libs/libtipscan.lua | 3 +++
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/libs/libcast.lua b/libs/libcast.lua
index 88f23af8..ce52ab0e 100644
--- a/libs/libcast.lua
+++ b/libs/libcast.lua
@@ -25,6 +25,9 @@ setfenv(1, pfUI:GetEnvironment())
 --    spell can be set to "INTERRUPT" to force remove an action.
 --
 
+-- return instantly when another libcast is already active
+if pfUI.api.libcast then return end
+
 local libcast = CreateFrame("Frame", "pfEnemyCast")
 local player = UnitName("player")
 
diff --git a/libs/librange.lua b/libs/librange.lua
index 8bc2412c..afdb2923 100644
--- a/libs/librange.lua
+++ b/libs/librange.lua
@@ -8,6 +8,9 @@ setfenv(1, pfUI:GetEnvironment())
 --    Returns `1` if the unit is within a 40y range
 --
 
+-- return instantly when another librange is already active
+if pfUI.api.librange then return end
+
 local librange = CreateFrame("Frame", "pfRangecheck", UIParent)
 
 -- table of 40y spells per class
@@ -183,5 +186,5 @@ function librange:UnitInSpellRange(unit)
   end
 end
 
--- add libdebuff to pfUI API
+-- add librange to pfUI API
 pfUI.api.librange = librange
diff --git a/libs/libspell.lua b/libs/libspell.lua
index 63fbbd4f..da8f02d0 100644
--- a/libs/libspell.lua
+++ b/libs/libspell.lua
@@ -1,6 +1,9 @@
 -- load pfUI environment
 setfenv(1, pfUI:GetEnvironment())
 
+-- return instantly when another libspell is already active
+if pfUI.api.libspell then return end
+
 local scanner = libtipscan:GetScanner("libspell")
 local libspell = {}
 
diff --git a/libs/libtipscan.lua b/libs/libtipscan.lua
index 173227af..e50f1698 100644
--- a/libs/libtipscan.lua
+++ b/libs/libtipscan.lua
@@ -25,6 +25,9 @@ setfenv(1, pfUI:GetEnvironment())
 --  <scanner>:List()
 --    prints a list of all available scanner methods
 
+-- return instantly when another libtipscan is already active
+if pfUI.api.libtipscan then return end
+
 local libtipscan = {}
 local baseName = "pfUIScan"
 local methods = {