LPegs patterns: removed most of the rules from (un)protectarb(), moved \par into takeoutcapetc().

[todo] more work is now needed for footnotes to work in some extreme cases

1 files changed, 40 insertions, 26 deletions

diff --git a/arabluatex.lua b/arabluatex.lua
index 053fb50..6a08a33 100644
--- a/arabluatex.lua
+++ b/arabluatex.lua
@@ -35,21 +35,12 @@ local function gsub(s, patt, repl)
 end
 
 local function protectarb(str)
---   str = string.gsub(str, "(\\arb%s?)(%[.-%])(%b{})", "\\@arb%2%3")
---   str = string.gsub(str, "(\\begin%s?)(%b{})(%b[])", "\\@@begin{%2%3}")
---   str = string.gsub(str, "(\\begin%s?)(%b{})", "\\@begin%2")
---   str = string.gsub(str, "(\\end%s?)(%b{})", "\\@end%2")
---   str = string.gsub(str, "\\par", "\\p@r{}")
---   str = string.gsub(str, "\\@@par", "\\p@r{}")
+   str = string.gsub(str, "(\\arb%s?)(%[.-%])(%b{})", "\\@arb%2%3")
 return str
 end
 
 local function unprotectarb(str)
---   str = string.gsub(str, "(\\@arb)(%[.-%])(%b{})", "\\arb%2%3")
---   str = string.gsub(str, "(\\@@begin){(%b{})(%b[])}", "\\begin%2%3")
---   str = string.gsub(str, "(\\@begin)(%b{})", "\\begin%2")
---   str = string.gsub(str, "(\\@end)(%b{})", "\\end%2")
---   str = string.gsub(str, "\\p@r{}", "\\par")
+   str = string.gsub(str, "(\\@arb)(%[.-%])(%b{})", "\\arb%2%3")
 return str
 end
 
@@ -57,11 +48,8 @@ end
 -- arabluatex.  'albrkcmds' is what is set by default.  'brkcmds' is
 -- what may be set in the preamble as argument of \MkArbBreak{}
 local albrkcmds = {
-   "arb",
    "begin",
    "end",
-   "par",
-   "@@par",
    "RL",
    "LR",
    "RLfootnote",
@@ -89,12 +77,16 @@ function mkarbbreak(str)
 end
 
 -- some basic patterns:
+local ascii = lpeg.R("az", "AZ", "@@")
 local dblbkslash = lpeg.Cs("\\")
 local bsqbrackets = lpeg.Cs{ "[" * ((1 - lpeg.S"[]") + lpeg.V(1))^0 * "]" }
 local bcbraces = lpeg.Cs{ "{" * ((1 - lpeg.S"{}") + lpeg.V(1))^0 * "}" }
 local spce = lpeg.Cs(" ")
+local spcenc = lpeg.P(" ")
+local cmdstar = lpeg.Cs(spce * lpeg.P("*"))
 local bsqbracketsii = lpeg.Cs(bsqbrackets^-2)
 local bcbracesii = lpeg.Cs(bcbraces^-2)
+local cmd = lpeg.Cs(dblbkslash * ascii^1 * cmdstar^-1)
 local cmdargs = lpeg.Cs(spce * bsqbracketsii * bcbracesii * bsqbrackets^-1)
 
 local function breakcmd(str)
@@ -133,22 +125,43 @@ local function breakcmd(str)
    return str
 end
 
+---[[
+local function holdcmd(str)
+   str = gsub(str, lpeg.Cs("\\arb") * bcbraces, function(tag, body)
+        body = string.sub(body, 2, -2)
+        body = gsub(body, cmd * bsqbracketsii * spcenc^-1 * bcbraces, function(btag, bopt, bbody)
+        bbody = string.sub(bbody, 2, -2)
+        if string.find(btag, "@") then
+           return holdcmd(string.format("}%s%s{%s}\\arb{", btag, bopt, bbody))
+        else
+           return holdcmd(string.format("}%s%s{\\arb{%s}}\\arb{", btag, bopt, bbody))
+        end
+        end)
+        return string.format("%s{%s}", tag, body)
+   end)
+   str = string.gsub(str, "\\arb{}", "")
+   return str
+end
+--]]
+
+--[[
 local function holdcmd(str)
         str = string.gsub(str, "\\(arb)(%b{})", function(tag, body)
         body = string.sub(body, 2, -2)
         body = string.gsub(body, "\\(.-)(%b{})", function(btag, bbody)
         bbody = string.sub(bbody, 2, -2)
---      if string.find(btag, "@") then
---      return holdcmd(string.format("}\\%s{%s}\\arb{", btag, bbody))   
---      else
+        if string.find(btag, "@") then
+        return holdcmd(string.format("}\\%s{%s}\\arb{", btag, bbody))
+        else
         return holdcmd(string.format("}\\%s{\\arb{%s}}\\arb{", btag, bbody))
---      end
+        end
         end)
         return string.format("\\%s{%s}", tag, body)
         end)
         str = string.gsub(str, "\\arb{}", "")
 return str
 end
+--]]
 
 local function arbnum(str)
    str = string.gsub(str, "([0-9%,%-%/]+)", function(num)
@@ -207,6 +220,7 @@ local function takeoutcapetc(str)
    end)
    str = string.gsub(str, "\\linebreak", "")
    str = string.gsub(str, "\\%-", "")
+   str = string.gsub(str, "\\(@-)par", "\\%1par{}")
    return str
 end
 
@@ -594,7 +608,7 @@ function processvoc(str, rules, scheme)
    str = "\\arb{".. str.."}"
    str = processarbnull(str, scheme)
    str = takeoutcapetc(str)
---   str = protectarb(str)
+   str = protectarb(str)
    str = breakcmd(str)
    str = holdcmd(str)
    if scheme == "buckwalter" then
@@ -605,7 +619,7 @@ function processvoc(str, rules, scheme)
    elseif rules == "dflt" or rules == "idgham" then
       str = voc(str, rules)
       else end
---   str = unprotectarb(str)
+   str = unprotectarb(str)
 return str
 end
 
@@ -613,7 +627,7 @@ function processfullvoc(str, rules, scheme)
    str = "\\arb{".. str.."}"
    str = processarbnull(str, scheme)
    str = takeoutcapetc(str)
---   str = protectarb(str)
+   str = protectarb(str)
    str = breakcmd(str)
    str = holdcmd(str)
    if scheme == "buckwalter" then
@@ -626,7 +640,7 @@ function processfullvoc(str, rules, scheme)
    elseif rules == "dflt" or rules == "idgham" then
       str = fullvoc(str, rules)
       else end
---   str = unprotectarb(str)
+   str = unprotectarb(str)
 return str
 end
 
@@ -634,7 +648,7 @@ function processnovoc(str, rules, scheme)
    str = "\\arb{".. str.."}"
    str = processarbnull(str, scheme)
    str = takeoutcapetc(str)
---   str = protectarb(str)
+   str = protectarb(str)
    str = breakcmd(str)
    str = holdcmd(str)
    if scheme == "buckwalter" then
@@ -645,7 +659,7 @@ function processnovoc(str, rules, scheme)
    elseif rules == "dflt" or rules == "idgham" then
       str = novoc(str)
       else end
---   str = unprotectarb(str)
+   str = unprotectarb(str)
 return str
 end
 
@@ -654,7 +668,7 @@ function processtrans(str, mode, rules, scheme)
    str = processdiscretionary(str)
    str = processarbnull(str, scheme)
    str = takeoutabjad(str)
---   str = protectarb(str)
+   str = protectarb(str)
    str = breakcmd(str)
    str = holdcmd(str)
    if scheme == "buckwalter" then
@@ -667,7 +681,7 @@ function processtrans(str, mode, rules, scheme)
    elseif mode == "arabica" then
       str = transarabica(str)
    end
---   str = unprotectarb(str)
+   str = unprotectarb(str)
 return str
 end