ebnf.js (6085B)
1 // CodeMirror, copyright (c) by Marijn Haverbeke and others 2 // Distributed under an MIT license: http://codemirror.net/LICENSE 3 4 (function(mod) { 5 if (typeof exports == "object" && typeof module == "object") // CommonJS 6 mod(require("../../lib/codemirror")); 7 else if (typeof define == "function" && define.amd) // AMD 8 define(["../../lib/codemirror"], mod); 9 else // Plain browser env 10 mod(CodeMirror); 11 })(function(CodeMirror) { 12 "use strict"; 13 14 CodeMirror.defineMode("ebnf", function (config) { 15 var commentType = {slash: 0, parenthesis: 1}; 16 var stateType = {comment: 0, _string: 1, characterClass: 2}; 17 var bracesMode = null; 18 19 if (config.bracesMode) 20 bracesMode = CodeMirror.getMode(config, config.bracesMode); 21 22 return { 23 startState: function () { 24 return { 25 stringType: null, 26 commentType: null, 27 braced: 0, 28 lhs: true, 29 localState: null, 30 stack: [], 31 inDefinition: false 32 }; 33 }, 34 token: function (stream, state) { 35 if (!stream) return; 36 37 //check for state changes 38 if (state.stack.length === 0) { 39 //strings 40 if ((stream.peek() == '"') || (stream.peek() == "'")) { 41 state.stringType = stream.peek(); 42 stream.next(); // Skip quote 43 state.stack.unshift(stateType._string); 44 } else if (stream.match(/^\/\*/)) { //comments starting with /* 45 state.stack.unshift(stateType.comment); 46 state.commentType = commentType.slash; 47 } else if (stream.match(/^\(\*/)) { //comments starting with (* 48 state.stack.unshift(stateType.comment); 49 state.commentType = commentType.parenthesis; 50 } 51 } 52 53 //return state 54 //stack has 55 switch (state.stack[0]) { 56 case stateType._string: 57 while (state.stack[0] === stateType._string && !stream.eol()) { 58 if (stream.peek() === state.stringType) { 59 stream.next(); // Skip quote 60 state.stack.shift(); // Clear flag 61 } else if (stream.peek() === "\\") { 62 stream.next(); 63 stream.next(); 64 } else { 65 stream.match(/^.[^\\\"\']*/); 66 } 67 } 68 return state.lhs ? "property string" : "string"; // Token style 69 70 case stateType.comment: 71 while (state.stack[0] === stateType.comment && !stream.eol()) { 72 if (state.commentType === commentType.slash && stream.match(/\*\//)) { 73 state.stack.shift(); // Clear flag 74 state.commentType = null; 75 } else if (state.commentType === commentType.parenthesis && stream.match(/\*\)/)) { 76 state.stack.shift(); // Clear flag 77 state.commentType = null; 78 } else { 79 stream.match(/^.[^\*]*/); 80 } 81 } 82 return "comment"; 83 84 case stateType.characterClass: 85 while (state.stack[0] === stateType.characterClass && !stream.eol()) { 86 if (!(stream.match(/^[^\]\\]+/) || stream.match(/^\\./))) { 87 state.stack.shift(); 88 } 89 } 90 return "operator"; 91 } 92 93 var peek = stream.peek(); 94 95 if (bracesMode !== null && (state.braced || peek === "{")) { 96 if (state.localState === null) 97 state.localState = CodeMirror.startState(bracesMode); 98 99 var token = bracesMode.token(stream, state.localState), 100 text = stream.current(); 101 102 if (!token) { 103 for (var i = 0; i < text.length; i++) { 104 if (text[i] === "{") { 105 if (state.braced === 0) { 106 token = "matchingbracket"; 107 } 108 state.braced++; 109 } else if (text[i] === "}") { 110 state.braced--; 111 if (state.braced === 0) { 112 token = "matchingbracket"; 113 } 114 } 115 } 116 } 117 return token; 118 } 119 120 //no stack 121 switch (peek) { 122 case "[": 123 stream.next(); 124 state.stack.unshift(stateType.characterClass); 125 return "bracket"; 126 case ":": 127 case "|": 128 case ";": 129 stream.next(); 130 return "operator"; 131 case "%": 132 if (stream.match("%%")) { 133 return "header"; 134 } else if (stream.match(/[%][A-Za-z]+/)) { 135 return "keyword"; 136 } else if (stream.match(/[%][}]/)) { 137 return "matchingbracket"; 138 } 139 break; 140 case "/": 141 if (stream.match(/[\/][A-Za-z]+/)) { 142 return "keyword"; 143 } 144 case "\\": 145 if (stream.match(/[\][a-z]+/)) { 146 return "string-2"; 147 } 148 case ".": 149 if (stream.match(".")) { 150 return "atom"; 151 } 152 case "*": 153 case "-": 154 case "+": 155 case "^": 156 if (stream.match(peek)) { 157 return "atom"; 158 } 159 case "$": 160 if (stream.match("$$")) { 161 return "builtin"; 162 } else if (stream.match(/[$][0-9]+/)) { 163 return "variable-3"; 164 } 165 case "<": 166 if (stream.match(/<<[a-zA-Z_]+>>/)) { 167 return "builtin"; 168 } 169 } 170 171 if (stream.match(/^\/\//)) { 172 stream.skipToEnd(); 173 return "comment"; 174 } else if (stream.match(/return/)) { 175 return "operator"; 176 } else if (stream.match(/^[a-zA-Z_][a-zA-Z0-9_]*/)) { 177 if (stream.match(/(?=[\(.])/)) { 178 return "variable"; 179 } else if (stream.match(/(?=[\s\n]*[:=])/)) { 180 return "def"; 181 } 182 return "variable-2"; 183 } else if (["[", "]", "(", ")"].indexOf(stream.peek()) != -1) { 184 stream.next(); 185 return "bracket"; 186 } else if (!stream.eatSpace()) { 187 stream.next(); 188 } 189 return null; 190 } 191 }; 192 }); 193 194 CodeMirror.defineMIME("text/x-ebnf", "ebnf"); 195 });