// CodeMirror, copyright (c) by Marijn Haverbeke and others

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// Distributed under an MIT license: http://codemirror.net/LICENSE

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// Originally written by Alf Nielsen, re-written by Michael Zhou

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(function(mod) {

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if (typeof exports == "object" && typeof module == "object") // CommonJS

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mod(require("../../lib/codemirror"));

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else if (typeof define == "function" && define.amd) // AMD

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define(["../../lib/codemirror"], mod);

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else // Plain browser env

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mod(CodeMirror);

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})(function(CodeMirror) {

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"use strict";

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function words(str) {

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var obj = {}, words = str.split(",");

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for (var i = 0; i < words.length; ++i) {

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var allCaps = words[i].toUpperCase();

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var firstCap = words[i].charAt(0).toUpperCase() + words[i].slice(1);

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obj[words[i]] = true;

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obj[allCaps] = true;

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obj[firstCap] = true;

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}

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return obj;

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}

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function metaHook(stream) {

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stream.eatWhile(/[\w\$_]/);

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return "meta";

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}

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CodeMirror.defineMode("vhdl", function(config, parserConfig) {

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var indentUnit = config.indentUnit,

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atoms = parserConfig.atoms || words("null"),

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hooks = parserConfig.hooks || {"`": metaHook, "$": metaHook},

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multiLineStrings = parserConfig.multiLineStrings;

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var keywords = words("abs,access,after,alias,all,and,architecture,array,assert,attribute,begin,block," +

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"body,buffer,bus,case,component,configuration,constant,disconnect,downto,else,elsif,end,end block,end case," +

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"end component,end for,end generate,end if,end loop,end process,end record,end units,entity,exit,file,for," +

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"function,generate,generic,generic map,group,guarded,if,impure,in,inertial,inout,is,label,library,linkage," +

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"literal,loop,map,mod,nand,new,next,nor,null,of,on,open,or,others,out,package,package body,port,port map," +

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"postponed,procedure,process,pure,range,record,register,reject,rem,report,return,rol,ror,select,severity,signal," +

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"sla,sll,sra,srl,subtype,then,to,transport,type,unaffected,units,until,use,variable,wait,when,while,with,xnor,xor");

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var blockKeywords = words("architecture,entity,begin,case,port,else,elsif,end,for,function,if");

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var isOperatorChar = /[&|~><!\)\(*#%@+\/=?\:;}{,\.\^\-\[\]]/;

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var curPunc;

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function tokenBase(stream, state) {

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var ch = stream.next();

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if (hooks[ch]) {

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var result = hooks[ch](stream, state);

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if (result !== false) return result;

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}

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if (ch == '"') {

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state.tokenize = tokenString2(ch);

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return state.tokenize(stream, state);

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}

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if (ch == "'") {

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state.tokenize = tokenString(ch);

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return state.tokenize(stream, state);

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}

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if (/[\[\]{}\(\),;\:\.]/.test(ch)) {

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curPunc = ch;

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return null;

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}

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if (/[\d']/.test(ch)) {

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stream.eatWhile(/[\w\.']/);

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return "number";

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}

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if (ch == "-") {

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if (stream.eat("-")) {

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stream.skipToEnd();

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return "comment";

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}

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}

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if (isOperatorChar.test(ch)) {

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stream.eatWhile(isOperatorChar);

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return "operator";

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}

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stream.eatWhile(/[\w\$_]/);

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var cur = stream.current();

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if (keywords.propertyIsEnumerable(cur.toLowerCase())) {

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if (blockKeywords.propertyIsEnumerable(cur)) curPunc = "newstatement";

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return "keyword";

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}

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if (atoms.propertyIsEnumerable(cur)) return "atom";

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return "variable";

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}

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function tokenString(quote) {

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return function(stream, state) {

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var escaped = false, next, end = false;

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while ((next = stream.next()) != null) {

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if (next == quote && !escaped) {end = true; break;}

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escaped = !escaped && next == "--";

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}

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if (end || !(escaped || multiLineStrings))

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state.tokenize = tokenBase;

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return "string";

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};

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}

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function tokenString2(quote) {

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return function(stream, state) {

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var escaped = false, next, end = false;

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while ((next = stream.next()) != null) {

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if (next == quote && !escaped) {end = true; break;}

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escaped = !escaped && next == "--";

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}

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if (end || !(escaped || multiLineStrings))

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state.tokenize = tokenBase;

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return "string-2";

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};

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}

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function Context(indented, column, type, align, prev) {

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this.indented = indented;

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this.column = column;

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this.type = type;

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this.align = align;

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this.prev = prev;

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}

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function pushContext(state, col, type) {

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return state.context = new Context(state.indented, col, type, null, state.context);

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}

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function popContext(state) {

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var t = state.context.type;

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if (t == ")" || t == "]" || t == "}")

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state.indented = state.context.indented;

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return state.context = state.context.prev;

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}

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// Interface

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return {

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startState: function(basecolumn) {

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return {

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tokenize: null,

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context: new Context((basecolumn || 0) - indentUnit, 0, "top", false),

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indented: 0,

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startOfLine: true

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};

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},

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token: function(stream, state) {

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var ctx = state.context;

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if (stream.sol()) {

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if (ctx.align == null) ctx.align = false;

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state.indented = stream.indentation();

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state.startOfLine = true;

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}

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if (stream.eatSpace()) return null;

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curPunc = null;

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var style = (state.tokenize || tokenBase)(stream, state);

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if (style == "comment" || style == "meta") return style;

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if (ctx.align == null) ctx.align = true;

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if ((curPunc == ";" || curPunc == ":") && ctx.type == "statement") popContext(state);

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else if (curPunc == "{") pushContext(state, stream.column(), "}");

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else if (curPunc == "[") pushContext(state, stream.column(), "]");

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else if (curPunc == "(") pushContext(state, stream.column(), ")");

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else if (curPunc == "}") {

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while (ctx.type == "statement") ctx = popContext(state);

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if (ctx.type == "}") ctx = popContext(state);

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while (ctx.type == "statement") ctx = popContext(state);

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}

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else if (curPunc == ctx.type) popContext(state);

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else if (ctx.type == "}" || ctx.type == "top" || (ctx.type == "statement" && curPunc == "newstatement"))

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pushContext(state, stream.column(), "statement");

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state.startOfLine = false;

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return style;

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},

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indent: function(state, textAfter) {

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if (state.tokenize != tokenBase && state.tokenize != null) return 0;

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var firstChar = textAfter && textAfter.charAt(0), ctx = state.context, closing = firstChar == ctx.type;

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if (ctx.type == "statement") return ctx.indented + (firstChar == "{" ? 0 : indentUnit);

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else if (ctx.align) return ctx.column + (closing ? 0 : 1);

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else return ctx.indented + (closing ? 0 : indentUnit);

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},

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electricChars: "{}"

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};

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});

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CodeMirror.defineMIME("text/x-vhdl", "vhdl");

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});

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