2 files changed, 302 insertions, 0 deletions

diff --git a/js/codemirror/mode/haskell/haskell.js b/js/codemirror/mode/haskell/haskell.js
new file mode 100644
index 00000000..aac50410
--- /dev/null
+++ b/js/codemirror/mode/haskell/haskell.js
@@ -0,0 +1,242 @@
+CodeMirror.defineMode("haskell", function(cmCfg, modeCfg) {
+
+  function switchState(source, setState, f) {
+    setState(f);
+    return f(source, setState);
+  }
+  
+  // These should all be Unicode extended, as per the Haskell 2010 report
+  var smallRE = /[a-z_]/;
+  var largeRE = /[A-Z]/;
+  var digitRE = /[0-9]/;
+  var hexitRE = /[0-9A-Fa-f]/;
+  var octitRE = /[0-7]/;
+  var idRE = /[a-z_A-Z0-9']/;
+  var symbolRE = /[-!#$%&*+.\/<=>?@\\^|~:]/;
+  var specialRE = /[(),;[\]`{}]/;
+  var whiteCharRE = /[ \t\v\f]/; // newlines are handled in tokenizer
+    
+  function normal(source, setState) {
+    if (source.eatWhile(whiteCharRE)) {
+      return null;
+    }
+      
+    var ch = source.next();
+    if (specialRE.test(ch)) {
+      if (ch == '{' && source.eat('-')) {
+        var t = "comment";
+        if (source.eat('#')) {
+          t = "meta";
+        }
+        return switchState(source, setState, ncomment(t, 1));
+      }
+      return null;
+    }
+    
+    if (ch == '\'') {
+      if (source.eat('\\')) {
+        source.next();  // should handle other escapes here
+      }
+      else {
+        source.next();
+      }
+      if (source.eat('\'')) {
+        return "string";
+      }
+      return "error";
+    }
+    
+    if (ch == '"') {
+      return switchState(source, setState, stringLiteral);
+    }
+      
+    if (largeRE.test(ch)) {
+      source.eatWhile(idRE);
+      if (source.eat('.')) {
+        return "qualifier";
+      }
+      return "variable-2";
+    }
+      
+    if (smallRE.test(ch)) {
+      source.eatWhile(idRE);
+      return "variable";
+    }
+      
+    if (digitRE.test(ch)) {
+      if (ch == '0') {
+        if (source.eat(/[xX]/)) {
+          source.eatWhile(hexitRE); // should require at least 1
+          return "integer";
+        }
+        if (source.eat(/[oO]/)) {
+          source.eatWhile(octitRE); // should require at least 1
+          return "number";
+        }
+      }
+      source.eatWhile(digitRE);
+      var t = "number";
+      if (source.eat('.')) {
+        t = "number";
+        source.eatWhile(digitRE); // should require at least 1
+      }
+      if (source.eat(/[eE]/)) {
+        t = "number";
+        source.eat(/[-+]/);
+        source.eatWhile(digitRE); // should require at least 1
+      }
+      return t;
+    }
+      
+    if (symbolRE.test(ch)) {
+      if (ch == '-' && source.eat(/-/)) {
+        source.eatWhile(/-/);
+        if (!source.eat(symbolRE)) {
+          source.skipToEnd();
+          return "comment";
+        }
+      }
+      var t = "variable";
+      if (ch == ':') {
+        t = "variable-2";
+      }
+      source.eatWhile(symbolRE);
+      return t;    
+    }
+      
+    return "error";
+  }
+    
+  function ncomment(type, nest) {
+    if (nest == 0) {
+      return normal;
+    }
+    return function(source, setState) {
+      var currNest = nest;
+      while (!source.eol()) {
+        var ch = source.next();
+        if (ch == '{' && source.eat('-')) {
+          ++currNest;
+        }
+        else if (ch == '-' && source.eat('}')) {
+          --currNest;
+          if (currNest == 0) {
+            setState(normal);
+            return type;
+          }
+        }
+      }
+      setState(ncomment(type, currNest));
+      return type;
+    }
+  }
+    
+  function stringLiteral(source, setState) {
+    while (!source.eol()) {
+      var ch = source.next();
+      if (ch == '"') {
+        setState(normal);
+        return "string";
+      }
+      if (ch == '\\') {
+        if (source.eol() || source.eat(whiteCharRE)) {
+          setState(stringGap);
+          return "string";
+        }
+        if (source.eat('&')) {
+        }
+        else {
+          source.next(); // should handle other escapes here
+        }
+      }
+    }
+    setState(normal);
+    return "error";
+  }
+  
+  function stringGap(source, setState) {
+    if (source.eat('\\')) {
+      return switchState(source, setState, stringLiteral);
+    }
+    source.next();
+    setState(normal);
+    return "error";
+  }
+  
+  
+  var wellKnownWords = (function() {
+    var wkw = {};
+    function setType(t) {
+      return function () {
+        for (var i = 0; i < arguments.length; i++)
+          wkw[arguments[i]] = t;
+      }
+    }
+    
+    setType("keyword")(
+      "case", "class", "data", "default", "deriving", "do", "else", "foreign",
+      "if", "import", "in", "infix", "infixl", "infixr", "instance", "let",
+      "module", "newtype", "of", "then", "type", "where", "_");
+      
+    setType("keyword")(
+      "\.\.", ":", "::", "=", "\\", "\"", "<-", "->", "@", "~", "=>");
+      
+    setType("builtin")(
+      "!!", "$!", "$", "&&", "+", "++", "-", ".", "/", "/=", "<", "<=", "=<<",
+      "==", ">", ">=", ">>", ">>=", "^", "^^", "||", "*", "**");
+      
+    setType("builtin")(
+      "Bool", "Bounded", "Char", "Double", "EQ", "Either", "Enum", "Eq",
+      "False", "FilePath", "Float", "Floating", "Fractional", "Functor", "GT",
+      "IO", "IOError", "Int", "Integer", "Integral", "Just", "LT", "Left",
+      "Maybe", "Monad", "Nothing", "Num", "Ord", "Ordering", "Rational", "Read",
+      "ReadS", "Real", "RealFloat", "RealFrac", "Right", "Show", "ShowS",
+      "String", "True");
+      
+    setType("builtin")(
+      "abs", "acos", "acosh", "all", "and", "any", "appendFile", "asTypeOf",
+      "asin", "asinh", "atan", "atan2", "atanh", "break", "catch", "ceiling",
+      "compare", "concat", "concatMap", "const", "cos", "cosh", "curry",
+      "cycle", "decodeFloat", "div", "divMod", "drop", "dropWhile", "either",
+      "elem", "encodeFloat", "enumFrom", "enumFromThen", "enumFromThenTo",
+      "enumFromTo", "error", "even", "exp", "exponent", "fail", "filter",
+      "flip", "floatDigits", "floatRadix", "floatRange", "floor", "fmap",
+      "foldl", "foldl1", "foldr", "foldr1", "fromEnum", "fromInteger",
+      "fromIntegral", "fromRational", "fst", "gcd", "getChar", "getContents",
+      "getLine", "head", "id", "init", "interact", "ioError", "isDenormalized",
+      "isIEEE", "isInfinite", "isNaN", "isNegativeZero", "iterate", "last",
+      "lcm", "length", "lex", "lines", "log", "logBase", "lookup", "map",
+      "mapM", "mapM_", "max", "maxBound", "maximum", "maybe", "min", "minBound",
+      "minimum", "mod", "negate", "not", "notElem", "null", "odd", "or",
+      "otherwise", "pi", "pred", "print", "product", "properFraction",
+      "putChar", "putStr", "putStrLn", "quot", "quotRem", "read", "readFile",
+      "readIO", "readList", "readLn", "readParen", "reads", "readsPrec",
+      "realToFrac", "recip", "rem", "repeat", "replicate", "return", "reverse",
+      "round", "scaleFloat", "scanl", "scanl1", "scanr", "scanr1", "seq",
+      "sequence", "sequence_", "show", "showChar", "showList", "showParen",
+      "showString", "shows", "showsPrec", "significand", "signum", "sin",
+      "sinh", "snd", "span", "splitAt", "sqrt", "subtract", "succ", "sum",
+      "tail", "take", "takeWhile", "tan", "tanh", "toEnum", "toInteger",
+      "toRational", "truncate", "uncurry", "undefined", "unlines", "until",
+      "unwords", "unzip", "unzip3", "userError", "words", "writeFile", "zip",
+      "zip3", "zipWith", "zipWith3");
+      
+    return wkw;
+  })();
+    
+  
+  
+  return {
+    startState: function ()  { return { f: normal }; },
+    copyState:  function (s) { return { f: s.f }; },
+    
+    token: function(stream, state) {