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      1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
      2 // Distributed under an MIT license: http://codemirror.net/LICENSE
      3 
      4 (function(mod) {
      5   if (typeof exports == "object" && typeof module == "object") // CommonJS
      6     mod(require("../../lib/codemirror"));
      7   else if (typeof define == "function" && define.amd) // AMD
      8     define(["../../lib/codemirror"], mod);
      9   else // Plain browser env
     10     mod(CodeMirror);
     11 })(function(CodeMirror) {
     12   "use strict";
     13 
     14   function wordRegexp(words) {
     15     return new RegExp("^((" + words.join(")|(") + "))\\b");
     16   }
     17 
     18   var wordOperators = wordRegexp(["and", "or", "not", "is", "in"]);
     19   var commonKeywords = ["as", "assert", "break", "class", "continue",
     20                         "def", "del", "elif", "else", "except", "finally",
     21                         "for", "from", "global", "if", "import",
     22                         "lambda", "pass", "raise", "return",
     23                         "try", "while", "with", "yield"];
     24   var commonBuiltins = ["abs", "all", "any", "bin", "bool", "bytearray", "callable", "chr",
     25                         "classmethod", "compile", "complex", "delattr", "dict", "dir", "divmod",
     26                         "enumerate", "eval", "filter", "float", "format", "frozenset",
     27                         "getattr", "globals", "hasattr", "hash", "help", "hex", "id",
     28                         "input", "int", "isinstance", "issubclass", "iter", "len",
     29                         "list", "locals", "map", "max", "memoryview", "min", "next",
     30                         "object", "oct", "open", "ord", "pow", "property", "range",
     31                         "repr", "reversed", "round", "set", "setattr", "slice",
     32                         "sorted", "staticmethod", "str", "sum", "super", "tuple",
     33                         "type", "vars", "zip", "__import__", "NotImplemented",
     34                         "Ellipsis", "__debug__"];
     35   var py2 = {builtins: ["apply", "basestring", "buffer", "cmp", "coerce", "execfile",
     36                         "file", "intern", "long", "raw_input", "reduce", "reload",
     37                         "unichr", "unicode", "xrange", "False", "True", "None"],
     38              keywords: ["exec", "print"]};
     39   var py3 = {builtins: ["ascii", "bytes", "exec", "print"],
     40              keywords: ["nonlocal", "False", "True", "None"]};
     41 
     42   CodeMirror.registerHelper("hintWords", "python", commonKeywords.concat(commonBuiltins));
     43 
     44   function top(state) {
     45     return state.scopes[state.scopes.length - 1];
     46   }
     47 
     48   CodeMirror.defineMode("python", function(conf, parserConf) {
     49     var ERRORCLASS = "error";
     50 
     51     var singleOperators = parserConf.singleOperators || new RegExp("^[\\+\\-\\*/%&|\\^~<>!]");
     52     var singleDelimiters = parserConf.singleDelimiters || new RegExp("^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]");
     53     var doubleOperators = parserConf.doubleOperators || new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))");
     54     var doubleDelimiters = parserConf.doubleDelimiters || new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");
     55     var tripleDelimiters = parserConf.tripleDelimiters || new RegExp("^((//=)|(>>=)|(<<=)|(\\*\\*=))");
     56     var identifiers = parserConf.identifiers|| new RegExp("^[_A-Za-z][_A-Za-z0-9]*");
     57     var hangingIndent = parserConf.hangingIndent || conf.indentUnit;
     58 
     59     var myKeywords = commonKeywords, myBuiltins = commonBuiltins;
     60     if(parserConf.extra_keywords != undefined){
     61       myKeywords = myKeywords.concat(parserConf.extra_keywords);
     62     }
     63     if(parserConf.extra_builtins != undefined){
     64       myBuiltins = myBuiltins.concat(parserConf.extra_builtins);
     65     }
     66     if (parserConf.version && parseInt(parserConf.version, 10) == 3) {
     67       myKeywords = myKeywords.concat(py3.keywords);
     68       myBuiltins = myBuiltins.concat(py3.builtins);
     69       var stringPrefixes = new RegExp("^(([rb]|(br))?('{3}|\"{3}|['\"]))", "i");
     70     } else {
     71       myKeywords = myKeywords.concat(py2.keywords);
     72       myBuiltins = myBuiltins.concat(py2.builtins);
     73       var stringPrefixes = new RegExp("^(([rub]|(ur)|(br))?('{3}|\"{3}|['\"]))", "i");
     74     }
     75     var keywords = wordRegexp(myKeywords);
     76     var builtins = wordRegexp(myBuiltins);
     77 
     78     // tokenizers
     79     function tokenBase(stream, state) {
     80       // Handle scope changes
     81       if (stream.sol() && top(state).type == "py") {
     82         var scopeOffset = top(state).offset;
     83         if (stream.eatSpace()) {
     84           var lineOffset = stream.indentation();
     85           if (lineOffset > scopeOffset)
     86             pushScope(stream, state, "py");
     87           else if (lineOffset < scopeOffset && dedent(stream, state))
     88             state.errorToken = true;
     89           return null;
     90         } else {
     91           var style = tokenBaseInner(stream, state);
     92           if (scopeOffset > 0 && dedent(stream, state))
     93             style += " " + ERRORCLASS;
     94           return style;
     95         }
     96       }
     97       return tokenBaseInner(stream, state);
     98     }
     99 
    100     function tokenBaseInner(stream, state) {
    101       if (stream.eatSpace()) return null;
    102 
    103       var ch = stream.peek();
    104 
    105       // Handle Comments
    106       if (ch == "#") {
    107         stream.skipToEnd();
    108         return "comment";
    109       }
    110 
    111       // Handle Number Literals
    112       if (stream.match(/^[0-9\.]/, false)) {
    113         var floatLiteral = false;
    114         // Floats
    115         if (stream.match(/^\d*\.\d+(e[\+\-]?\d+)?/i)) { floatLiteral = true; }
    116         if (stream.match(/^\d+\.\d*/)) { floatLiteral = true; }
    117         if (stream.match(/^\.\d+/)) { floatLiteral = true; }
    118         if (floatLiteral) {
    119           // Float literals may be "imaginary"
    120           stream.eat(/J/i);
    121           return "number";
    122         }
    123         // Integers
    124         var intLiteral = false;
    125         // Hex
    126         if (stream.match(/^0x[0-9a-f]+/i)) intLiteral = true;
    127         // Binary
    128         if (stream.match(/^0b[01]+/i)) intLiteral = true;
    129         // Octal
    130         if (stream.match(/^0o[0-7]+/i)) intLiteral = true;
    131         // Decimal
    132         if (stream.match(/^[1-9]\d*(e[\+\-]?\d+)?/)) {
    133           // Decimal literals may be "imaginary"
    134           stream.eat(/J/i);
    135           // TODO - Can you have imaginary longs?
    136           intLiteral = true;
    137         }
    138         // Zero by itself with no other piece of number.
    139         if (stream.match(/^0(?![\dx])/i)) intLiteral = true;
    140         if (intLiteral) {
    141           // Integer literals may be "long"
    142           stream.eat(/L/i);
    143           return "number";
    144         }
    145       }
    146 
    147       // Handle Strings
    148       if (stream.match(stringPrefixes)) {
    149         state.tokenize = tokenStringFactory(stream.current());
    150         return state.tokenize(stream, state);
    151       }
    152 
    153       // Handle operators and Delimiters
    154       if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters))
    155         return null;
    156 
    157       if (stream.match(doubleOperators)
    158           || stream.match(singleOperators)
    159           || stream.match(wordOperators))
    160         return "operator";
    161 
    162       if (stream.match(singleDelimiters))
    163         return null;
    164 
    165       if (stream.match(keywords))
    166         return "keyword";
    167 
    168       if (stream.match(builtins))
    169         return "builtin";
    170 
    171       if (stream.match(/^(self|cls)\b/))
    172         return "variable-2";
    173 
    174       if (stream.match(identifiers)) {
    175         if (state.lastToken == "def" || state.lastToken == "class")
    176           return "def";
    177         return "variable";
    178       }
    179 
    180       // Handle non-detected items
    181       stream.next();
    182       return ERRORCLASS;
    183     }
    184 
    185     function tokenStringFactory(delimiter) {
    186       while ("rub".indexOf(delimiter.charAt(0).toLowerCase()) >= 0)
    187         delimiter = delimiter.substr(1);
    188 
    189       var singleline = delimiter.length == 1;
    190       var OUTCLASS = "string";
    191 
    192       function tokenString(stream, state) {
    193         while (!stream.eol()) {
    194           stream.eatWhile(/[^'"\\]/);
    195           if (stream.eat("\\")) {
    196             stream.next();
    197             if (singleline && stream.eol())
    198               return OUTCLASS;
    199           } else if (stream.match(delimiter)) {
    200             state.tokenize = tokenBase;
    201             return OUTCLASS;
    202           } else {
    203             stream.eat(/['"]/);
    204           }
    205         }
    206         if (singleline) {
    207           if (parserConf.singleLineStringErrors)
    208             return ERRORCLASS;
    209           else
    210             state.tokenize = tokenBase;
    211         }
    212         return OUTCLASS;
    213       }
    214       tokenString.isString = true;
    215       return tokenString;
    216     }
    217 
    218     function pushScope(stream, state, type) {
    219       var offset = 0, align = null;
    220       if (type == "py") {
    221         while (top(state).type != "py")
    222           state.scopes.pop();
    223       }
    224       offset = top(state).offset + (type == "py" ? conf.indentUnit : hangingIndent);
    225       if (type != "py" && !stream.match(/^(\s|#.*)*$/, false))
    226         align = stream.column() + 1;
    227       state.scopes.push({offset: offset, type: type, align: align});
    228     }
    229 
    230     function dedent(stream, state) {
    231       var indented = stream.indentation();
    232       while (top(state).offset > indented) {
    233         if (top(state).type != "py") return true;
    234         state.scopes.pop();
    235       }
    236       return top(state).offset != indented;
    237     }
    238 
    239     function tokenLexer(stream, state) {
    240       var style = state.tokenize(stream, state);
    241       var current = stream.current();
    242 
    243       // Handle '.' connected identifiers
    244       if (current == ".") {
    245         style = stream.match(identifiers, false) ? null : ERRORCLASS;
    246         if (style == null && state.lastStyle == "meta") {
    247           // Apply 'meta' style to '.' connected identifiers when
    248           // appropriate.
    249           style = "meta";
    250         }
    251         return style;
    252       }
    253 
    254       // Handle decorators
    255       if (current == "@")
    256         return stream.match(identifiers, false) ? "meta" : ERRORCLASS;
    257 
    258       if ((style == "variable" || style == "builtin")
    259           && state.lastStyle == "meta")
    260         style = "meta";
    261 
    262       // Handle scope changes.
    263       if (current == "pass" || current == "return")
    264         state.dedent += 1;
    265 
    266       if (current == "lambda") state.lambda = true;
    267       if (current == ":" && !state.lambda && top(state).type == "py")
    268         pushScope(stream, state, "py");
    269 
    270       var delimiter_index = current.length == 1 ? "[({".indexOf(current) : -1;
    271       if (delimiter_index != -1)
    272         pushScope(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
    273 
    274       delimiter_index = "])}".indexOf(current);
    275       if (delimiter_index != -1) {
    276         if (top(state).type == current) state.scopes.pop();
    277         else return ERRORCLASS;
    278       }
    279       if (state.dedent > 0 && stream.eol() && top(state).type == "py") {
    280         if (state.scopes.length > 1) state.scopes.pop();
    281         state.dedent -= 1;
    282       }
    283 
    284       return style;
    285     }
    286 
    287     var external = {
    288       startState: function(basecolumn) {
    289         return {
    290           tokenize: tokenBase,
    291           scopes: [{offset: basecolumn || 0, type: "py", align: null}],
    292           lastStyle: null,
    293           lastToken: null,
    294           lambda: false,
    295           dedent: 0
    296         };
    297       },
    298 
    299       token: function(stream, state) {
    300         var addErr = state.errorToken;
    301         if (addErr) state.errorToken = false;
    302         var style = tokenLexer(stream, state);
    303 
    304         state.lastStyle = style;
    305 
    306         var current = stream.current();
    307         if (current && style)
    308           state.lastToken = current;
    309 
    310         if (stream.eol() && state.lambda)
    311           state.lambda = false;
    312         return addErr ? style + " " + ERRORCLASS : style;
    313       },
    314 
    315       indent: function(state, textAfter) {
    316         if (state.tokenize != tokenBase)
    317           return state.tokenize.isString ? CodeMirror.Pass : 0;
    318 
    319         var scope = top(state);
    320         var closing = textAfter && textAfter.charAt(0) == scope.type;
    321         if (scope.align != null)
    322           return scope.align - (closing ? 1 : 0);
    323         else if (closing && state.scopes.length > 1)
    324           return state.scopes[state.scopes.length - 2].offset;
    325         else
    326           return scope.offset;
    327       },
    328 
    329       lineComment: "#",
    330       fold: "indent"
    331     };
    332     return external;
    333   });
    334 
    335   CodeMirror.defineMIME("text/x-python", "python");
    336 
    337   var words = function(str) { return str.split(" "); };
    338 
    339   CodeMirror.defineMIME("text/x-cython", {
    340     name: "python",
    341     extra_keywords: words("by cdef cimport cpdef ctypedef enum except"+
    342                           "extern gil include nogil property public"+
    343                           "readonly struct union DEF IF ELIF ELSE")
    344   });
    345 
    346 });
    347