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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  // Originally written by Alf Nielsen, re-written by Michael Zhou
   5  (function(mod) {
   6    if (typeof exports == "object" && typeof module == "object") // CommonJS
   7      mod(require("../../lib/codemirror"));
   8    else if (typeof define == "function" && define.amd) // AMD
   9      define(["../../lib/codemirror"], mod);
  10    else // Plain browser env
  11      mod(CodeMirror);
  12  })(function(CodeMirror) {
  13  "use strict";
  14  
  15  function words(str) {
  16    var obj = {}, words = str.split(",");
  17    for (var i = 0; i < words.length; ++i) {
  18      var allCaps = words[i].toUpperCase();
  19      var firstCap = words[i].charAt(0).toUpperCase() + words[i].slice(1);
  20      obj[words[i]] = true;
  21      obj[allCaps] = true;
  22      obj[firstCap] = true;
  23    }
  24    return obj;
  25  }
  26  
  27  function metaHook(stream) {
  28    stream.eatWhile(/[\w\$_]/);
  29    return "meta";
  30  }
  31  
  32  CodeMirror.defineMode("vhdl", function(config, parserConfig) {
  33    var indentUnit = config.indentUnit,
  34        atoms = parserConfig.atoms || words("null"),
  35        hooks = parserConfig.hooks || {"`": metaHook, "$": metaHook},
  36        multiLineStrings = parserConfig.multiLineStrings;
  37  
  38    var keywords = words("abs,access,after,alias,all,and,architecture,array,assert,attribute,begin,block," +
  39        "body,buffer,bus,case,component,configuration,constant,disconnect,downto,else,elsif,end,end block,end case," +
  40        "end component,end for,end generate,end if,end loop,end process,end record,end units,entity,exit,file,for," +
  41        "function,generate,generic,generic map,group,guarded,if,impure,in,inertial,inout,is,label,library,linkage," +
  42        "literal,loop,map,mod,nand,new,next,nor,null,of,on,open,or,others,out,package,package body,port,port map," +
  43        "postponed,procedure,process,pure,range,record,register,reject,rem,report,return,rol,ror,select,severity,signal," +
  44        "sla,sll,sra,srl,subtype,then,to,transport,type,unaffected,units,until,use,variable,wait,when,while,with,xnor,xor");
  45  
  46    var blockKeywords = words("architecture,entity,begin,case,port,else,elsif,end,for,function,if");
  47  
  48    var isOperatorChar = /[&|~><!\)\(*#%@+\/=?\:;}{,\.\^\-\[\]]/;
  49    var curPunc;
  50  
  51    function tokenBase(stream, state) {
  52      var ch = stream.next();
  53      if (hooks[ch]) {
  54        var result = hooks[ch](stream, state);
  55        if (result !== false) return result;
  56      }
  57      if (ch == '"') {
  58        state.tokenize = tokenString2(ch);
  59        return state.tokenize(stream, state);
  60      }
  61      if (ch == "'") {
  62        state.tokenize = tokenString(ch);
  63        return state.tokenize(stream, state);
  64      }
  65      if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
  66        curPunc = ch;
  67        return null;
  68      }
  69      if (/[\d']/.test(ch)) {
  70        stream.eatWhile(/[\w\.']/);
  71        return "number";
  72      }
  73      if (ch == "-") {
  74        if (stream.eat("-")) {
  75          stream.skipToEnd();
  76          return "comment";
  77        }
  78      }
  79      if (isOperatorChar.test(ch)) {
  80        stream.eatWhile(isOperatorChar);
  81        return "operator";
  82      }
  83      stream.eatWhile(/[\w\$_]/);
  84      var cur = stream.current();
  85      if (keywords.propertyIsEnumerable(cur.toLowerCase())) {
  86        if (blockKeywords.propertyIsEnumerable(cur)) curPunc = "newstatement";
  87        return "keyword";
  88      }
  89      if (atoms.propertyIsEnumerable(cur)) return "atom";
  90      return "variable";
  91    }
  92  
  93    function tokenString(quote) {
  94      return function(stream, state) {
  95        var escaped = false, next, end = false;
  96        while ((next = stream.next()) != null) {
  97          if (next == quote && !escaped) {end = true; break;}
  98          escaped = !escaped && next == "--";
  99        }
 100        if (end || !(escaped || multiLineStrings))
 101          state.tokenize = tokenBase;
 102        return "string";
 103      };
 104    }
 105    function tokenString2(quote) {
 106      return function(stream, state) {
 107        var escaped = false, next, end = false;
 108        while ((next = stream.next()) != null) {
 109          if (next == quote && !escaped) {end = true; break;}
 110          escaped = !escaped && next == "--";
 111        }
 112        if (end || !(escaped || multiLineStrings))
 113          state.tokenize = tokenBase;
 114        return "string-2";
 115      };
 116    }
 117  
 118    function Context(indented, column, type, align, prev) {
 119      this.indented = indented;
 120      this.column = column;
 121      this.type = type;
 122      this.align = align;
 123      this.prev = prev;
 124    }
 125    function pushContext(state, col, type) {
 126      return state.context = new Context(state.indented, col, type, null, state.context);
 127    }
 128    function popContext(state) {
 129      var t = state.context.type;
 130      if (t == ")" || t == "]" || t == "}")
 131        state.indented = state.context.indented;
 132      return state.context = state.context.prev;
 133    }
 134  
 135    // Interface
 136    return {
 137      startState: function(basecolumn) {
 138        return {
 139          tokenize: null,
 140          context: new Context((basecolumn || 0) - indentUnit, 0, "top", false),
 141          indented: 0,
 142          startOfLine: true
 143        };
 144      },
 145  
 146      token: function(stream, state) {
 147        var ctx = state.context;
 148        if (stream.sol()) {
 149          if (ctx.align == null) ctx.align = false;
 150          state.indented = stream.indentation();
 151          state.startOfLine = true;
 152        }
 153        if (stream.eatSpace()) return null;
 154        curPunc = null;
 155        var style = (state.tokenize || tokenBase)(stream, state);
 156        if (style == "comment" || style == "meta") return style;
 157        if (ctx.align == null) ctx.align = true;
 158  
 159        if ((curPunc == ";" || curPunc == ":") && ctx.type == "statement") popContext(state);
 160        else if (curPunc == "{") pushContext(state, stream.column(), "}");
 161        else if (curPunc == "[") pushContext(state, stream.column(), "]");
 162        else if (curPunc == "(") pushContext(state, stream.column(), ")");
 163        else if (curPunc == "}") {
 164          while (ctx.type == "statement") ctx = popContext(state);
 165          if (ctx.type == "}") ctx = popContext(state);
 166          while (ctx.type == "statement") ctx = popContext(state);
 167        }
 168        else if (curPunc == ctx.type) popContext(state);
 169        else if (ctx.type == "}" || ctx.type == "top" || (ctx.type == "statement" && curPunc == "newstatement"))
 170          pushContext(state, stream.column(), "statement");
 171        state.startOfLine = false;
 172        return style;
 173      },
 174  
 175      indent: function(state, textAfter) {
 176        if (state.tokenize != tokenBase && state.tokenize != null) return 0;
 177        var firstChar = textAfter && textAfter.charAt(0), ctx = state.context, closing = firstChar == ctx.type;
 178        if (ctx.type == "statement") return ctx.indented + (firstChar == "{" ? 0 : indentUnit);
 179        else if (ctx.align) return ctx.column + (closing ? 0 : 1);
 180        else return ctx.indented + (closing ? 0 : indentUnit);
 181      },
 182  
 183      electricChars: "{}"
 184    };
 185  });
 186  
 187  CodeMirror.defineMIME("text/x-vhdl", "vhdl");
 188  
 189  });