1// CodeMirror, copyright (c) by Marijn Haverbeke and others
  2// Distributed under an MIT license: https://codemirror.net/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
 15function 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
 27function metaHook(stream) {
 28  stream.eatWhile(/[\w\$_]/);
 29  return "meta";
 30}
 31
 32CodeMirror.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
187CodeMirror.defineMIME("text/x-vhdl", "vhdl");
188
189});