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if not modules then modules = { } end modules ['buff-imp-lua'] = {
version = 1.001,
comment = "companion to buff-imp-lua.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- borrowed from ctx scite lexers
-- add goto/label scanning
--
-- depricated:
--
-- gcinfo unpack getfenv setfenv loadlib
-- table.maxn table.getn table.setn
-- math.log10 math.mod math.modf math.fmod
local format, tohash = string.format, table.tohash
local P, S, V, patterns = lpeg.P, lpeg.S, lpeg.V, lpeg.patterns
local C, Cs, Cg, Cb, Cmt, Carg = lpeg.C, lpeg.Cs, lpeg.Cg, lpeg.Cb, lpeg.Cmt, lpeg.Carg
local core = tohash {
"and", "break", "do", "else", "elseif", "end", "false", "for", "function",
"if", "in", "local", "nil", "not", "or", "repeat", "return", "then",
"true", "until", "while"
}
local base = tohash {
"assert", "collectgarbage", "dofile", "error", "loadfile",
"loadstring", "load", "print", "rawget", "rawset", "require", "tonumber",
"tostring", "type", "_G", "getmetatable", "ipairs", "next", "pairs",
"pcall", "rawequal", "setmetatable", "xpcall", "module", "select", "goto",
}
local libraries = {
coroutine = tohash {
"create", "resume", "status", "wrap", "yield", "running",
},
package = tohash{
"cpath", "loaded", "loadlib", "path", "config", "preload", "seeall",
},
io = tohash{
"close", "flush", "input", "lines", "open", "output", "read", "tmpfile",
"type", "write", "stdin", "stdout", "stderr", "popen",
},
math = tohash{
"abs", "acos", "asin", "atan", "atan2", "ceil", "cos", "deg", "exp",
"floor ", "ldexp", "log", "max", "min", "pi", "pow", "rad", "random",
"randomseed", "sin", "sqrt", "tan", "cosh", "sinh", "tanh", "huge",
},
string = tohash{
"byte", "char", "dump", "find", "len", "lower", "rep", "sub", "upper",
"format", "gfind", "gsub", "gmatch", "match", "reverse",
},
table = tohash{
"concat", "foreach", "foreachi", "sort", "insert", "remove", "pack",
"unpack",
},
os = tohash{
"clock", "date", "difftime", "execute", "exit", "getenv", "remove",
"rename", "setlocale", "time", "tmpname",
},
lpeg = tohash{
"print", "match", "locale", "type", "version", "setmaxstack",
"P", "R", "S", "C", "V", "Cs", "Ct", "Cs", "Cc", "Cp", "Carg",
"Cg", "Cb", "Cmt", "Cf", "B",
},
-- bit
-- debug
}
local context = context
local verbatim = context.verbatim
local makepattern = visualizers.makepattern
local LuaSnippet = context.LuaSnippet
local startLuaSnippet = context.startLuaSnippet
local stopLuaSnippet = context.stopLuaSnippet
local LuaSnippetBoundary = verbatim.LuaSnippetBoundary
local LuaSnippetQuote = verbatim.LuaSnippetQuote
local LuaSnippetString = verbatim.LuaSnippetString
local LuaSnippetSpecial = verbatim.LuaSnippetSpecial
local LuaSnippetComment = verbatim.LuaSnippetComment
local LuaSnippetNameCore = verbatim.LuaSnippetNameCore
local LuaSnippetNameBase = verbatim.LuaSnippetNameBase
local LuaSnippetNameLibraries = verbatim.LuaSnippetNameLibraries
local LuaSnippetName = verbatim.LuaSnippetName
local namespace
local function visualizename_a(s)
if core[s] then
namespace = nil
LuaSnippetNameCore(s)
elseif base[s] then
namespace = nil
LuaSnippetNameBase(s)
else
namespace = libraries[s]
if namespace then
LuaSnippetNameLibraries(s)
else
LuaSnippetName(s)
end
end
end
local function visualizename_b(s)
if namespace and namespace[s] then
namespace = nil
LuaSnippetNameLibraries(s)
else
LuaSnippetName(s)
end
end
local function visualizename_c(s)
LuaSnippetName(s)
end
local handler = visualizers.newhandler {
startinline = function() LuaSnippet(false,"{") end,
stopinline = function() context("}") end,
startdisplay = function() startLuaSnippet() end,
stopdisplay = function() stopLuaSnippet() end ,
boundary = function(s) LuaSnippetBoundary(s) end,
special = function(s) LuaSnippetSpecial(s) end,
comment = function(s) LuaSnippetComment(s) end,
quote = function(s) LuaSnippetQuote(s) end,
string = function(s) LuaSnippetString(s) end,
period = function(s) verbatim(s) end,
name_a = visualizename_a,
name_b = visualizename_b,
name_c = visualizename_c,
}
local comment = P("--")
local name = (patterns.letter + patterns.underscore)
* (patterns.letter + patterns.underscore + patterns.digit)^0
local boundary = S('()[]{}')
local special = S("-+/*^%=#~|<>") + P("..")
-- The following longstring parser is taken from Roberto's documentation
-- that can be found at http://www.inf.puc-rio.br/~roberto/lpeg/lpeg.html.
local equals = P("=")^0
local open = P("[") * Cg(equals, "init") * P("[") * P("\n")^-1 -- maybe better: patterns.newline^-1
local close = P("]") * C(equals) * P("]")
local closeeq = Cmt(close * Cb("init"), function(s,i,a,b) return a == b end) -- wrong return value
local longstring = open * Cs((P(1) - closeeq)^0) * close * Carg(1)
local function long(content,equals,settings)
handler.boundary(format("[%s[",equals or ""))
visualizers.write(content,settings) -- unhandled
handler.boundary(format("]%s]",equals or ""))
end
local grammar = visualizers.newgrammar("default", { "visualizer",
sstring =
makepattern(handler,"quote",patterns.dquote)
* (V("whitespace") + makepattern(handler,"string",(1-patterns.dquote-V("whitespace"))^1))^0 -- patterns.nodquote
* makepattern(handler,"quote",patterns.dquote),
dstring =
makepattern(handler,"quote",patterns.squote)
* (V("whitespace") + makepattern(handler,"string",(1-patterns.squote-V("whitespace"))^1))^0 -- patterns.nosquote
* makepattern(handler,"quote",patterns.squote),
longstring =
longstring / long,
comment =
makepattern(handler,"comment",comment)
* (V("space") + V("content"))^0,
longcomment =
makepattern(handler,"comment",comment)
* longstring / long,
name =
makepattern(handler,"name_a",name)
* ( V("optionalwhitespace")
* makepattern(handler,"default",patterns.period)
* V("optionalwhitespace")
* makepattern(handler,"name_b",name)
)^-1
* ( V("optionalwhitespace")
* makepattern(handler,"default",patterns.period)
* V("optionalwhitespace")
* makepattern(handler,"name_c",name)
)^0,
pattern =
V("longcomment")
+ V("comment")
+ V("longstring")
+ V("dstring")
+ V("sstring")
+ V("name")
+ makepattern(handler,"boundary",boundary)
+ makepattern(handler,"special",special)
+ V("space")
+ V("line")
+ V("default"),
visualizer =
V("pattern")^1
} )
local parser = P(grammar)
visualizers.register("lua", { parser = parser, handler = handler, grammar = grammar } )
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