clike.js

CodeMirror.defineMode("clike", function(config, parserConfig) {
  var indentUnit = config.indentUnit,
      enableMultiLineIndent = !!config.enableMultiLineIndent,
      multiLineIndentUnit = config.multiLineIndentUnit || config.indentUnit,
      keywords = parserConfig.keywords || {},
      builtin = parserConfig.builtin || {},
      blockKeywords = parserConfig.blockKeywords || {},
      atoms = parserConfig.atoms || {},
      hooks = parserConfig.hooks || {},
      multiLineStrings = parserConfig.multiLineStrings;
  var isOperatorChar = /[+\-*&%=<>!?|\/]/;

  var curPunc;

  function tokenBase(stream, state) {
    var ch = stream.next();
    if (hooks[ch]) {
      var result = hooks[ch](stream, state);
      if (result !== false) return result;
    }
    if (ch == '"' || ch == "'") {
      state.tokenize = tokenString(ch);
      return state.tokenize(stream, state);
    }
    if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
      curPunc = ch;
      return null;
    }
    if (/\d/.test(ch)) {
      stream.eatWhile(/[\w\.]/);
      return "number";
    }
    if (ch == "/") {
      if (stream.eat("*")) {
        state.tokenize = tokenComment;
        return tokenComment(stream, state);
      }
      if (stream.eat("/")) {
        stream.skipToEnd();
        return "comment";
      }
    }
    if (isOperatorChar.test(ch)) {
      stream.eatWhile(isOperatorChar);
      return "operator";
    }
    stream.eatWhile(/[\w\$_]/);
    var cur = stream.current();
    if (keywords.propertyIsEnumerable(cur)) {
      if (blockKeywords.propertyIsEnumerable(cur)) curPunc = "newstatement";
      return "keyword";
    }
    if (builtin.propertyIsEnumerable(cur)) {
      if (blockKeywords.propertyIsEnumerable(cur)) curPunc = "newstatement";
      return "builtin";
    }
    if (atoms.propertyIsEnumerable(cur)) return "atom";
    return "variable";
  }

  function tokenString(quote) {
    return function(stream, state) {
      var escaped = false, next, end = false;
      while ((next = stream.next()) != null) {
        if (next == quote && !escaped) {end = true; break;}
        escaped = !escaped && next == "\\";
      }
      if (end || !(escaped || multiLineStrings))
        state.tokenize = null;
      return "string";
    };
  }

  function tokenComment(stream, state) {
    var maybeEnd = false, ch;
    while (ch = stream.next()) {
      if (ch == "/" && maybeEnd) {
        state.tokenize = null;
        break;
      }
      maybeEnd = (ch == "*");
    }
    return "comment";
  }

  function Context(indented, column, type, align, prev, multiLineIndent) {
    this.indented = indented;
    this.column = column;
    this.type = type;
    this.align = align;
    this.prev = prev;
    this.multiLineIndent = enableMultiLineIndent && multiLineIndent;
  }
  function pushContext(state, col, type, multiLineIndent) {
    return state.context = new Context(state.indented, col, type, null, state.context, multiLineIndent);
  }
  function popContext(state) {
    var t = state.context.type;
    var prevCtx = state.context.prev, prevIndent = state.context.indented;
    // pop multiline statement context
    if (t == "statement") {
      while (prevCtx && prevCtx.type == "statement" && prevCtx.multiLineIndent) {
        prevIndent = prevCtx.indented;
        prevCtx = prevCtx.prev;
      }
    }

    if (t == ")" || t == "]" || t == "}")
        state.indented = prevIndent;
    return state.context = prevCtx;
  }

  // Interface

  return {
    startState: function(basecolumn) {
      return {
        tokenize: null,
        context: new Context((basecolumn || 0) - indentUnit, 0, "top", false),
        indented: 0,
        startOfLine: true
      };
    },

    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;
      }
      if (stream.eatSpace()) {
        if (ctx.type == "statement" && stream.eol() && enableMultiLineIndent) 
          state.context.multiLineIndent = true;
        return null;
      }
      curPunc = null;
      var style = (state.tokenize || tokenBase)(stream, state);
      if (style == "comment" || style == "meta") return style;
      if (ctx.align == null) ctx.align = true;

      if (ctx.type == "statement" && stream.eol() && enableMultiLineIndent) 
        state.context.multiLineIndent = true;

      if ((curPunc == ";" || curPunc == ":" || curPunc == ',') && ctx.type == "statement") popContext(state);
      else if (curPunc == "{") pushContext(state, stream.column(), "}", false);
      else if (curPunc == "[") pushContext(state, stream.column(), "]", false);
      else if (curPunc == "(") pushContext(state, stream.column(), ")", true);
      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") && (curPunc != "," && curPunc != ";")) || 
               (ctx.type == "statement" && curPunc == "newstatement"))
        pushContext(state, stream.column(), "statement", false);
      state.startOfLine = false;
      return style;
    },

    indent: function(state, textAfter) {
      if (state.tokenize == tokenComment) return CodeMirror.Pass;
      if (state.tokenize != tokenBase && state.tokenize != null) return 0;
      var ctx = state.context, firstChar = textAfter && textAfter.charAt(0);
      if (ctx.type == "statement" && firstChar == "}") ctx = ctx.prev;
      var closing = firstChar == ctx.type;
      
      if (ctx.type == "statement") {
        return ctx.indented + (firstChar == "{" ? 0 : ctx.multiLineIndent? multiLineIndentUnit : indentUnit);
      } else if (ctx.align) {
        return ctx.column + (closing ? 0 : 1);
      } else if (ctx.multiLineIndent) {
          // multi-line function calls, declarations with no parameters on start-line of function call.
          return ctx.indented + multiLineIndentUnit;
      } else if (ctx.type == '}' && ctx.prev.multiLineIndent) {
        // indent statements inside { }-block reference to start of multi-line statement
        var prevCtx = ctx.prev;
        while (prevCtx.prev.multiLineIndent) prevCtx = prevCtx.prev;
        return prevCtx.indented + (closing ? 0 : indentUnit);
      } else return ctx.indented + (closing ? 0 : indentUnit);
    },

    electricChars: "{}"
  };
});

(function() {
  function words(str) {
    var obj = {}, words = str.split(" ");
    for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
    return obj;
  }
  var cKeywords = "auto if break int case long char register continue return default short do sizeof " +
    "double static else struct entry switch extern typedef float union for unsigned " +
    "goto while enum void const signed volatile";

  function cppHook(stream, state) {
    if (!state.startOfLine) return false;
    for (;;) {
      if (stream.skipTo("\\")) {
        stream.next();
        if (stream.eol()) {
          state.tokenize = cppHook;
          break;
        }
      } else {
        stream.skipToEnd();
        state.tokenize = null;
        break;
      }
    }
    return "meta";
  }

  // C#-style strings where "" escapes a quote.
  function tokenAtString(stream, state) {
    var next;
    while ((next = stream.next()) != null) {
      if (next == '"' && !stream.eat('"')) {
        state.tokenize = null;
        break;
      }
    }
    return "string";
  }

  function mimes(ms, mode) {
    for (var i = 0; i < ms.length; ++i) CodeMirror.defineMIME(ms[i], mode);
  }

  mimes(["text/x-csrc", "text/x-c", "text/x-chdr"], {
    name: "clike",
    keywords: words(cKeywords),
    blockKeywords: words("case do else for if switch while struct"),
    atoms: words("null"),
    hooks: {"#": cppHook}
  });
  mimes(["text/x-c++src", "text/x-c++hdr"], {
    name: "clike",
    keywords: words(cKeywords + " asm dynamic_cast namespace reinterpret_cast try bool explicit new " +
                    "static_cast typeid catch operator template typename class friend private " +
                    "this using const_cast inline public throw virtual delete mutable protected " +
                    "wchar_t"),
    blockKeywords: words("catch class do else finally for if struct switch try while"),
    atoms: words("true false null"),
    hooks: {"#": cppHook}
  });
  CodeMirror.defineMIME("text/x-java", {
    name: "clike",
    keywords: words("abstract assert boolean break byte case catch char class const continue default " + 
                    "do double else enum extends final finally float for goto if implements import " +
                    "instanceof int interface long native new package private protected public " +
                    "return short static strictfp super switch synchronized this throw throws transient " +
                    "try void volatile while"),
    blockKeywords: words("catch class do else finally for if switch try while"),
    atoms: words("true false null"),
    hooks: {
      "@": function(stream, state) {
        stream.eatWhile(/[\w\$_]/);
        return "meta";
      }
    }
  });
  CodeMirror.defineMIME("text/x-csharp", {
    name: "clike",
    keywords: words("abstract as base break case catch checked class const continue" + 
                    " default delegate do else enum event explicit extern finally fixed for" + 
                    " foreach goto if implicit in interface internal is lock namespace new" + 
                    " operator out override params private protected public readonly ref return sealed" + 
                    " sizeof stackalloc static struct switch this throw try typeof unchecked" + 
                    " unsafe using virtual void volatile while add alias ascending descending dynamic from get" + 
                    " global group into join let orderby partial remove select set value var yield"),
    blockKeywords: words("catch class do else finally for foreach if struct switch try while"),
    builtin: words("Boolean Byte Char DateTime DateTimeOffset Decimal Double" +
                    " Guid Int16 Int32 Int64 Object SByte Single String TimeSpan UInt16 UInt32" +
                    " UInt64 bool byte char decimal double short int long object"  +
                    " sbyte float string ushort uint ulong"),
    atoms: words("true false null"),
    hooks: {
      "@": function(stream, state) {
        if (stream.eat('"')) {
          state.tokenize = tokenAtString;
          return tokenAtString(stream, state);
        }
        stream.eatWhile(/[\w\$_]/);
        return "meta";
      }
    }
  });
  CodeMirror.defineMIME("text/x-scala", {
    name: "clike",
    keywords: words(
      
      /* scala */
      "abstract case catch class def do else extends false final finally for forSome if " +
      "implicit import lazy match new null object override package private protected return " +
      "sealed super this throw trait try trye type val var while with yield _ : = => <- <: " +
      "<% >: # @ " +
                    
      /* package scala */
      "assert assume require print println printf readLine readBoolean readByte readShort " +
      "readChar readInt readLong readFloat readDouble " +
      
      "AnyVal App Application Array BufferedIterator BigDecimal BigInt Char Console Either " +
      "Enumeration Equiv Error Exception Fractional Function IndexedSeq Integral Iterable " +
      "Iterator List Map Numeric Nil NotNull Option Ordered Ordering PartialFunction PartialOrdering " +
      "Product Proxy Range Responder Seq Serializable Set Specializable Stream StringBuilder " +
      "StringContext Symbol Throwable Traversable TraversableOnce Tuple Unit Vector :: #:: " +
      
      /* package java.lang */            
      "Boolean Byte Character CharSequence Class ClassLoader Cloneable Comparable " +
      "Compiler Double Exception Float Integer Long Math Number Object Package Pair Process " +
      "Runtime Runnable SecurityManager Short StackTraceElement StrictMath String " +
      "StringBuffer System Thread ThreadGroup ThreadLocal Throwable Triple Void"
      
      
    ),
    blockKeywords: words("catch class do else finally for forSome if match switch try while"),
    atoms: words("true false null"),
    hooks: {
      "@": function(stream, state) {
        stream.eatWhile(/[\w\$_]/);
        return "meta";
      }
    }
  });
}());