Add Kotlin support

lib/constants.js

@@ -171,6 +171,11 @@ export const LANGUAGES = [
     name: 'Julia',
     module: 'julia'
   },
+  {
+    name: 'Kotlin',
+    module: 'kotlin',
+    custom: true
+  },
   {
     name: 'Lisp',
     module: 'commonlisp'

lib/customModes/kotlin.js

@@ -0,0 +1,295 @@
+const CodeMirror = require('codemirror')
+
+
+CodeMirror.defineMode("kotlin", function(config, parserConfig) {
+  function words(str) {
+    var obj = {},
+      words = str.split(" ");
+    for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
+    return obj;
+  }
+
+  var multiLineStrings = parserConfig.multiLineStrings;
+
+  var keywords = words(
+    "package continue return object while break class data trait throw super " +
+    "when type this else This try val var fun for is in if do as true false null get set " +
+    "import where by get set abstract enum open annotation override private public internal " +
+    "protected catch out vararg inline finally final ref const");
+  var blockKeywords = words("catch class do else finally for if where try while enum");
+  var atoms = words("null true false this");
+  var builtins = words(
+    "Int Double Float Long Short Byte IntArray ShortArray ByteArray String Boolean List Set " +
+    "Map MutableList MutableSet print println shl shr ushr and or xor inv ");
+
+  var curPunc;
+
+  function tokenBase(stream, state) {
+    var ch = stream.next();
+
+    if (ch == '"' || ch == "'") {
+      return startString(ch, stream, state);
+    }
+
+    // Wildcard import w/o trailing semicolon (import smth.*)
+    if (ch == "." && stream.eat("*")) {
+      return "word";
+    }
+
+    if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
+      curPunc = ch;
+      return null;
+    }
+
+    if (/\d/.test(ch)) {
+      if (stream.eat(/eE/)) {
+        stream.eat(/\+\-/);
+        stream.eatWhile(/\d/);
+      }
+
+      return "number";
+    }
+
+    if (ch == "/") {
+      if (stream.eat("*")) {
+        state.tokenize.push(tokenComment);
+        return tokenComment(stream, state);
+      }
+
+      if (stream.eat("/")) {
+        stream.skipToEnd();
+        return "comment";
+      }
+
+      if (expectExpression(state.lastToken)) {
+        return startString(ch, stream, state);
+      }
+    }
+
+    // Commented
+    if (ch == "-" && stream.eat(">")) {
+      curPunc = "->";
+      return null;
+    }
+
+    if (/[\-+*&%=<>!?|\/~]/.test(ch)) {
+      stream.eatWhile(/[\-+*&%=<>|~]/);
+      return "operator";
+    }
+
+    stream.eatWhile(/[\w\$_]/);
+
+    var cur = stream.current();
+
+    if (atoms.propertyIsEnumerable(cur)) {
+      return "atom";
+    }
+
+    if (keywords.propertyIsEnumerable(cur)) {
+      if (blockKeywords.propertyIsEnumerable(cur)) curPunc = "newstatement";
+      return "keyword";
+    }
+
+    if (builtins.propertyIsEnumerable(cur)) {
+      return "builtin";
+    }
+
+    return "word";
+  }
+
+  tokenBase.isBase = true;
+
+  function startString(quote, stream, state) {
+    var tripleQuoted = false;
+    if (quote != "/" && stream.eat(quote)) {
+      if (stream.eat(quote)) tripleQuoted = true;
+      else return "string";
+    }
+
+    function t(stream, state) {
+      var escaped = false,
+        next, end = !tripleQuoted;
+
+      while ((next = stream.next()) != null) {
+        if (next == quote && !escaped) {
+          if (!tripleQuoted) {
+            break;
+          }
+
+          if (stream.match(quote + quote)) {
+            end = true;
+            break;
+          }
+        }
+
+        if (quote == '"' && next == "$" && !escaped && stream.eat("{")) {
+          state.tokenize.push(tokenBaseUntilBrace());
+          return "string";
+        }
+
+        if (next == "$" && !escaped && !stream.eat(" ")) {
+          state.tokenize.push(tokenBaseUntilSpace());
+          return "string";
+        }
+        escaped = !escaped && next == "\\";
+      }
+
+      if (multiLineStrings)
+        state.tokenize.push(t);
+
+      if (end) state.tokenize.pop();
+
+      return "string";
+    }
+
+    state.tokenize.push(t);
+    return t(stream, state);
+  }
+
+  function tokenBaseUntilBrace() {
+    var depth = 1;
+
+    function t(stream, state) {
+      if (stream.peek() == "}") {
+        depth--;
+        if (depth == 0) {
+          state.tokenize.pop();
+          return state.tokenize[state.tokenize.length - 1](stream, state);
+        }
+      } else if (stream.peek() == "{") {
+        depth++;
+      }
+
+      return tokenBase(stream, state);
+    }
+
+    t.isBase = true;
+    return t;
+  }
+
+  function tokenBaseUntilSpace() {
+    function t(stream, state) {
+      if (stream.eat(/[\w]/)) {
+        var isWord = stream.eatWhile(/[\w]/);
+        if (isWord) {
+          state.tokenize.pop();
+          return "word";
+        }
+      }
+      state.tokenize.pop();
+      return "string";
+    }
+
+    t.isBase = true;
+    return t;
+  }
+
+  function tokenComment(stream, state) {
+    var maybeEnd = false,
+      ch;
+    while (ch = stream.next()) {
+      if (ch == "/" && maybeEnd) {
+        state.tokenize.pop();
+        break;
+      }
+
+      maybeEnd = (ch == "*");
+    }
+
+    return "comment";
+  }
+
+  function expectExpression(last) {
+    return !last || last == "operator" || last == "->" || /[\.\[\{\(,;:]/.test(last) ||
+      last == "newstatement" || last == "keyword" || last == "proplabel";
+  }
+
+  function Context(indented, column, type, align, prev) {
+    this.indented = indented;
+    this.column = column;
+    this.type = type;
+    this.align = align;
+    this.prev = prev;
+  }
+
+  function pushContext(state, col, type) {
+    return state.context = new Context(state.indented, col, type, null, state.context);
+  }
+
+  function popContext(state) {
+    var t = state.context.type;
+    if (t == ")" || t == "]" || t == "}")
+      state.indented = state.context.indented;
+    return state.context = state.context.prev;
+  }
+
+  // Interface
+
+  return {
+    startState: function(basecolumn) {
+      return {
+        tokenize: [tokenBase],
+        context: new Context((basecolumn || 0) - config.indentUnit, 0, "top", false),
+        indented: 0,
+        startOfLine: true,
+        lastToken: null
+      };
+    },
+
+    token: function(stream, state) {
+      var ctx = state.context;
+      if (stream.sol()) {
+        if (ctx.align == null) ctx.align = false;
+        state.indented = stream.indentation();
+        state.startOfLine = true;
+        // Automatic semicolon insertion
+        if (ctx.type == "statement" && !expectExpression(state.lastToken)) {
+          popContext(state);
+          ctx = state.context;
+        }
+      }
+      if (stream.eatSpace()) return null;
+      curPunc = null;
+      var style = state.tokenize[state.tokenize.length - 1](stream, state);
+      if (style == "comment") return style;
+      if (ctx.align == null) ctx.align = true;
+      if ((curPunc == ";" || curPunc == ":") && ctx.type == "statement") popContext(state);
+      // Handle indentation for {x -> \n ... }
+      else if (curPunc == "->" && ctx.type == "statement" && ctx.prev.type == "}") {
+        popContext(state);
+        state.context.align = false;
+      } else if (curPunc == "{") pushContext(state, stream.column(), "}");
+      else if (curPunc == "[") pushContext(state, stream.column(), "]");
+      else if (curPunc == "(") pushContext(state, stream.column(), ")");
+      else if (curPunc == "}") {
+        while (ctx.type == "statement") ctx = popContext(state);
+        if (ctx.type == "}") ctx = popContext(state);
+        while (ctx.type == "statement") ctx = popContext(state);
+      } else if (curPunc == ctx.type) popContext(state);
+      else if (ctx.type == "}" || ctx.type == "top" || (ctx.type == "statement" && curPunc == "newstatement"))
+        pushContext(state, stream.column(), "statement");
+      state.startOfLine = false;
+      state.lastToken = curPunc || style;
+      return style;
+    },
+
+    indent: function(state, textAfter) {
+      if (!state.tokenize[state.tokenize.length - 1].isBase) return 0;
+      var firstChar = textAfter && textAfter.charAt(0),
+        ctx = state.context;
+      if (ctx.type == "statement" && !expectExpression(state.lastToken)) ctx = ctx.prev;
+      var closing = firstChar == ctx.type;
+      if (ctx.type == "statement") {
+        return ctx.indented + (firstChar == "{" ? 0 : config.indentUnit);
+      } else if (ctx.align) return ctx.column + (closing ? 0 : 1);
+      else return ctx.indented + (closing ? 0 : config.indentUnit);
+    },
+
+    closeBrackets: {
+      triples: "'\""
+    },
+    electricChars: "{}"
+  };
+});
+
+CodeMirror.defineMIME("text/x-kotlin", "kotlin");