DevTools: roll CodeMirror

third_party/WebKit/Source/devtools/front_end/cm_modes/python.js

 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
   "use strict";
 
   function wordRegexp(words) {
     return new RegExp("^((" + words.join(")|(") + "))\\b");
   }
 
-  var wordOperators = wordRegexp(["and", "or", "not", "is", "in"]);
+  var wordOperators = wordRegexp(["and", "or", "not", "is"]);
   var commonKeywords = ["as", "assert", "break", "class", "continue",
                         "def", "del", "elif", "else", "except", "finally",
                         "for", "from", "global", "if", "import",
                         "lambda", "pass", "raise", "return",
-                        "try", "while", "with", "yield"];
+                        "try", "while", "with", "yield", "in"];
   var commonBuiltins = ["abs", "all", "any", "bin", "bool", "bytearray", "callable", "chr",
                         "classmethod", "compile", "complex", "delattr", "dict", "dir", "divmod",
                         "enumerate", "eval", "filter", "float", "format", "frozenset",
                         "getattr", "globals", "hasattr", "hash", "help", "hex", "id",
                         "input", "int", "isinstance", "issubclass", "iter", "len",
                         "list", "locals", "map", "max", "memoryview", "min", "next",
                         "object", "oct", "open", "ord", "pow", "property", "range",
                         "repr", "reversed", "round", "set", "setattr", "slice",
                         "sorted", "staticmethod", "str", "sum", "super", "tuple",
                         "type", "vars", "zip", "__import__", "NotImplemented",
                         "Ellipsis", "__debug__"];
-  var py2 = {builtins: ["apply", "basestring", "buffer", "cmp", "coerce", "execfile",
-                        "file", "intern", "long", "raw_input", "reduce", "reload",
-                        "unichr", "unicode", "xrange", "False", "True", "None"],
-             keywords: ["exec", "print"]};
-  var py3 = {builtins: ["ascii", "bytes", "exec", "print"],
-             keywords: ["nonlocal", "False", "True", "None"]};
-
   CodeMirror.registerHelper("hintWords", "python", commonKeywords.concat(commonBuiltins));
 
   function top(state) {
     return state.scopes[state.scopes.length - 1];
   }
 
   CodeMirror.defineMode("python", function(conf, parserConf) {
     var ERRORCLASS = "error";
 
-    var singleOperators = parserConf.singleOperators || new RegExp("^[\\+\\-\\*/%&|\\^~<>!]");
-    var singleDelimiters = parserConf.singleDelimiters || new RegExp("^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]");
-    var doubleOperators = parserConf.doubleOperators || new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))");
-    var doubleDelimiters = parserConf.doubleDelimiters || new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");
-    var tripleDelimiters = parserConf.tripleDelimiters || new RegExp("^((//=)|(>>=)|(<<=)|(\\*\\*=))");
-    var identifiers = parserConf.identifiers|| new RegExp("^[_A-Za-z][_A-Za-z0-9]*");
+    var singleDelimiters = parserConf.singleDelimiters || /^[\(\)\[\]\{\}@,:`=;\.]/;
+    var doubleOperators = parserConf.doubleOperators || /^([!<>]==|<>|<<|>>|\/\/|\*\*)/;
+    var doubleDelimiters = parserConf.doubleDelimiters || /^(\+=|\-=|\*=|%=|\/=|&=|\|=|\^=)/;
+    var tripleDelimiters = parserConf.tripleDelimiters || /^(\/\/=|>>=|<<=|\*\*=)/;
+
     var hangingIndent = parserConf.hangingIndent || conf.indentUnit;
 
     var myKeywords = commonKeywords, myBuiltins = commonBuiltins;
-    if(parserConf.extra_keywords != undefined){
+    if (parserConf.extra_keywords != undefined)
       myKeywords = myKeywords.concat(parserConf.extra_keywords);
-    }
-    if(parserConf.extra_builtins != undefined){
+
+    if (parserConf.extra_builtins != undefined)
       myBuiltins = myBuiltins.concat(parserConf.extra_builtins);
-    }
-    if (parserConf.version && parseInt(parserConf.version, 10) == 3) {
-      myKeywords = myKeywords.concat(py3.keywords);
-      myBuiltins = myBuiltins.concat(py3.builtins);
-      var stringPrefixes = new RegExp("^(([rb]|(br))?('{3}|\"{3}|['\"]))", "i");
+
+    var py3 = parserConf.version && parseInt(parserConf.version, 10) == 3
+    if (py3) {
+      // since http://legacy.python.org/dev/peps/pep-0465/ @ is also an operator
+      var singleOperators = parserConf.singleOperators || /^[\+\-\*\/%&|\^~<>!@]/;
+      var identifiers = parserConf.identifiers|| /^[_A-Za-z\u00A1-\uFFFF][_A-Za-z0-9\u00A1-\uFFFF]*/;
+      myKeywords = myKeywords.concat(["nonlocal", "False", "True", "None", "async", "await"]);
+      myBuiltins = myBuiltins.concat(["ascii", "bytes", "exec", "print"]);
+      var stringPrefixes = new RegExp("^(([rbuf]|(br))?('{3}|\"{3}|['\"]))", "i");
     } else {
-      myKeywords = myKeywords.concat(py2.keywords);
-      myBuiltins = myBuiltins.concat(py2.builtins);
+      var singleOperators = parserConf.singleOperators || /^[\+\-\*\/%&|\^~<>!]/;
+      var identifiers = parserConf.identifiers|| /^[_A-Za-z][_A-Za-z0-9]*/;
+      myKeywords = myKeywords.concat(["exec", "print"]);
+      myBuiltins = myBuiltins.concat(["apply", "basestring", "buffer", "cmp", "coerce", "execfile",
+                                      "file", "intern", "long", "raw_input", "reduce", "reload",
+                                      "unichr", "unicode", "xrange", "False", "True", "None"]);
       var stringPrefixes = new RegExp("^(([rub]|(ur)|(br))?('{3}|\"{3}|['\"]))", "i");
     }
     var keywords = wordRegexp(myKeywords);
     var builtins = wordRegexp(myBuiltins);
 
     // tokenizers
     function tokenBase(stream, state) {
+      if (stream.sol()) state.indent = stream.indentation()
       // Handle scope changes
       if (stream.sol() && top(state).type == "py") {
         var scopeOffset = top(state).offset;
         if (stream.eatSpace()) {
           var lineOffset = stream.indentation();
           if (lineOffset > scopeOffset)
-            pushScope(stream, state, "py");
+            pushPyScope(state);
           else if (lineOffset < scopeOffset && dedent(stream, state))
             state.errorToken = true;
           return null;
         } else {
           var style = tokenBaseInner(stream, state);
           if (scopeOffset > 0 && dedent(stream, state))
             style += " " + ERRORCLASS;
           return style;
         }
       }
@@ skipping 48 matching lines @@
       }
 
       // Handle Strings
       if (stream.match(stringPrefixes)) {
         state.tokenize = tokenStringFactory(stream.current());
         return state.tokenize(stream, state);
       }
 
       // Handle operators and Delimiters
       if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters))
-        return null;
+        return "punctuation";
 
-      if (stream.match(doubleOperators)
-          || stream.match(singleOperators)
-          || stream.match(wordOperators))
+      if (stream.match(doubleOperators) || stream.match(singleOperators))
         return "operator";
 
       if (stream.match(singleDelimiters))
-        return null;
+        return "punctuation";
 
-      if (stream.match(keywords))
+      if (state.lastToken == "." && stream.match(identifiers))
+        return "property";
+
+      if (stream.match(keywords) || stream.match(wordOperators))
         return "keyword";
 
       if (stream.match(builtins))
         return "builtin";
 
       if (stream.match(/^(self|cls)\b/))
         return "variable-2";
 
       if (stream.match(identifiers)) {
         if (state.lastToken == "def" || state.lastToken == "class")
@@ skipping 32 matching lines @@
             return ERRORCLASS;
           else
             state.tokenize = tokenBase;
         }
         return OUTCLASS;
       }
       tokenString.isString = true;
       return tokenString;
     }
 
-    function pushScope(stream, state, type) {
-      var offset = 0, align = null;
-      if (type == "py") {
-        while (top(state).type != "py")
-          state.scopes.pop();
-      }
-      offset = top(state).offset + (type == "py" ? conf.indentUnit : hangingIndent);
-      if (type != "py" && !stream.match(/^(\s|#.*)*$/, false))
-        align = stream.column() + 1;
-      state.scopes.push({offset: offset, type: type, align: align});
+    function pushPyScope(state) {
+      while (top(state).type != "py") state.scopes.pop()
+      state.scopes.push({offset: top(state).offset + conf.indentUnit,
+                         type: "py",
+                         align: null})
+    }
+
+    function pushBracketScope(stream, state, type) {
+      var align = stream.match(/^([\s\[\{\(]|#.*)*$/, false) ? null : stream.column() + 1
+      state.scopes.push({offset: state.indent + hangingIndent,
+                         type: type,
+                         align: align})
     }
 
     function dedent(stream, state) {
       var indented = stream.indentation();
-      while (top(state).offset > indented) {
+      while (state.scopes.length > 1 && top(state).offset > indented) {
         if (top(state).type != "py") return true;
         state.scopes.pop();
       }
       return top(state).offset != indented;
     }
 
     function tokenLexer(stream, state) {
+      if (stream.sol()) state.beginningOfLine = true;
+
       var style = state.tokenize(stream, state);
       var current = stream.current();
 
-      // Handle '.' connected identifiers
-      if (current == ".") {
-        style = stream.match(identifiers, false) ? null : ERRORCLASS;
-        if (style == null && state.lastStyle == "meta") {
-          // Apply 'meta' style to '.' connected identifiers when
-          // appropriate.
-          style = "meta";
-        }
-        return style;
-      }
+      // Handle decorators
+      if (state.beginningOfLine && current == "@")
+        return stream.match(identifiers, false) ? "meta" : py3 ? "operator" : ERRORCLASS;
 
-      // Handle decorators
-      if (current == "@")
-        return stream.match(identifiers, false) ? "meta" : ERRORCLASS;
+      if (/\S/.test(current)) state.beginningOfLine = false;
 
       if ((style == "variable" || style == "builtin")
-          && state.lastStyle == "meta")
+          && state.lastToken == "meta")
         style = "meta";
 
       // Handle scope changes.
       if (current == "pass" || current == "return")
         state.dedent += 1;
 
       if (current == "lambda") state.lambda = true;
       if (current == ":" && !state.lambda && top(state).type == "py")
-        pushScope(stream, state, "py");
+        pushPyScope(state);
 
       var delimiter_index = current.length == 1 ? "[({".indexOf(current) : -1;
       if (delimiter_index != -1)
-        pushScope(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
+        pushBracketScope(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
 
       delimiter_index = "])}".indexOf(current);
       if (delimiter_index != -1) {
-        if (top(state).type == current) state.scopes.pop();
+        if (top(state).type == current) state.indent = state.scopes.pop().offset - hangingIndent
         else return ERRORCLASS;
       }
       if (state.dedent > 0 && stream.eol() && top(state).type == "py") {
         if (state.scopes.length > 1) state.scopes.pop();
         state.dedent -= 1;
       }
 
       return style;
     }
 
     var external = {
       startState: function(basecolumn) {
         return {
           tokenize: tokenBase,
           scopes: [{offset: basecolumn || 0, type: "py", align: null}],
-          lastStyle: null,
+          indent: basecolumn || 0,
           lastToken: null,
           lambda: false,
           dedent: 0
         };
       },
 
       token: function(stream, state) {
         var addErr = state.errorToken;
         if (addErr) state.errorToken = false;
         var style = tokenLexer(stream, state);
 
-        state.lastStyle = style;
-
-        var current = stream.current();
-        if (current && style)
-          state.lastToken = current;
+        if (style && style != "comment")
+          state.lastToken = (style == "keyword" || style == "punctuation") ? stream.current() : style;
+        if (style == "punctuation") style = null;
 
         if (stream.eol() && state.lambda)
           state.lambda = false;
         return addErr ? style + " " + ERRORCLASS : style;
       },
 
       indent: function(state, textAfter) {
         if (state.tokenize != tokenBase)
           return state.tokenize.isString ? CodeMirror.Pass : 0;
 
-        var scope = top(state);
-        var closing = textAfter && textAfter.charAt(0) == scope.type;
+        var scope = top(state), closing = scope.type == textAfter.charAt(0)
         if (scope.align != null)
-          return scope.align - (closing ? 1 : 0);
-        else if (closing && state.scopes.length > 1)
-          return state.scopes[state.scopes.length - 2].offset;
+          return scope.align - (closing ? 1 : 0)
         else
-          return scope.offset;
+          return scope.offset - (closing ? hangingIndent : 0)
       },
 
+      electricInput: /^\s*[\}\]\)]$/,
+      closeBrackets: {triples: "'\""},
       lineComment: "#",
       fold: "indent"
     };
     return external;
   });
 
   CodeMirror.defineMIME("text/x-python", "python");
 
   var words = function(str) { return str.split(" "); };
 
   CodeMirror.defineMIME("text/x-cython", {
     name: "python",
     extra_keywords: words("by cdef cimport cpdef ctypedef enum except"+
                           "extern gil include nogil property public"+
                           "readonly struct union DEF IF ELIF ELSE")
   });
 
 });