1 files changed, 21 insertions, 7 deletions

diff --git a/arabluatex.lua b/arabluatex.lua
index ec318b7..3d6ec80 100644
--- a/arabluatex.lua
+++ b/arabluatex.lua
@@ -59,6 +59,20 @@ local baytargs = lpeg.Cs(spce * bcbraces * bsqbrackets^-1 * bcbraces)
 local arind = lpeg.Cs(dblbkslash * lpeg.P("arind") * spce^-1 * bsqbracketsii)
 
 local function protectarb(str)
+   -- \App[]{}{}
+   str = string.gsub(str, "(\\App%s?)(%b{})(%b{})", "%1[]%2%3")
+   str = gsub(str, lpeg.P("\\App") * spcenc^-1 * bsqbrackets * bcbraces * bcbraces,
+              function(opt, lem, rdg)
+                 opt = string.sub(opt, 2, -2)
+                 lem = string.sub(lem, 2, -2)
+                 rdg = string.sub(rdg, 2, -2)
+                 if opt == ""
+                 then
+                    return string.format("\\app{%s%s}", lem, rdg)
+                 else
+                    return string.format("\\app[%s]{%s%s}", opt, lem, rdg)
+                 end
+   end)
    str = string.gsub(str, "(\\arb%s?)(%[.-%])(%b{})", "\\al@brk{\\arb%2%3}")
    str = string.gsub(str, "(\\LR%s?)(%b{})", "\\@LR%2")
    str = string.gsub(str, "(\\RL%s?)(%b{})", "\\@RL%2")
@@ -121,14 +135,14 @@ end
 
 local function breakcmd(str)
    -- \par
-      str = gsub(str, dblbkslash * lpeg.Cs("par") * cmdargsnobs, "\\al@brk{%1%2%3}")
+   str = gsub(str, dblbkslash * lpeg.Cs("par") * cmdargsnobs, "\\al@brk{%1%2%3}")
    -- process \item[], then \item[]
-        str = string.gsub(str, "\\(item.?)(%b[])",
-          function(tag, body)
-          body = string.sub(body, 2, -2)
-          return string.format("\\al@brk{\\item[\\arb{%s}] }", body)
-        end)
-        str = string.gsub(str, "(\\item)(%s+)", "%1{}%2")
+   str = string.gsub(str, "\\(item.?)(%b[])",
+                     function(tag, body)
+                        body = string.sub(body, 2, -2)
+                        return string.format("\\al@brk{\\item[\\arb{%s}] }", body)
+   end)
+   str = string.gsub(str, "(\\item)(%s+)", "%1{}%2")
    -- \textcolor
         str = string.gsub(str, "\\(textcolor%s?)(%b{})(%b{})",
                           function(tag, bodycolor, bodytext)