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ebnf.js
195 lines
| 5.9 KiB
| application/javascript
|
JavascriptLexer
r1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others | |||
// Distributed under an MIT license: http://codemirror.net/LICENSE | ||||
(function(mod) { | ||||
if (typeof exports == "object" && typeof module == "object") // CommonJS | ||||
mod(require("../../lib/codemirror")); | ||||
else if (typeof define == "function" && define.amd) // AMD | ||||
define(["../../lib/codemirror"], mod); | ||||
else // Plain browser env | ||||
mod(CodeMirror); | ||||
})(function(CodeMirror) { | ||||
"use strict"; | ||||
CodeMirror.defineMode("ebnf", function (config) { | ||||
var commentType = {slash: 0, parenthesis: 1}; | ||||
var stateType = {comment: 0, _string: 1, characterClass: 2}; | ||||
var bracesMode = null; | ||||
if (config.bracesMode) | ||||
bracesMode = CodeMirror.getMode(config, config.bracesMode); | ||||
return { | ||||
startState: function () { | ||||
return { | ||||
stringType: null, | ||||
commentType: null, | ||||
braced: 0, | ||||
lhs: true, | ||||
localState: null, | ||||
stack: [], | ||||
inDefinition: false | ||||
}; | ||||
}, | ||||
token: function (stream, state) { | ||||
if (!stream) return; | ||||
//check for state changes | ||||
if (state.stack.length === 0) { | ||||
//strings | ||||
if ((stream.peek() == '"') || (stream.peek() == "'")) { | ||||
state.stringType = stream.peek(); | ||||
stream.next(); // Skip quote | ||||
state.stack.unshift(stateType._string); | ||||
} else if (stream.match(/^\/\*/)) { //comments starting with /* | ||||
state.stack.unshift(stateType.comment); | ||||
state.commentType = commentType.slash; | ||||
} else if (stream.match(/^\(\*/)) { //comments starting with (* | ||||
state.stack.unshift(stateType.comment); | ||||
state.commentType = commentType.parenthesis; | ||||
} | ||||
} | ||||
//return state | ||||
//stack has | ||||
switch (state.stack[0]) { | ||||
case stateType._string: | ||||
while (state.stack[0] === stateType._string && !stream.eol()) { | ||||
if (stream.peek() === state.stringType) { | ||||
stream.next(); // Skip quote | ||||
state.stack.shift(); // Clear flag | ||||
} else if (stream.peek() === "\\") { | ||||
stream.next(); | ||||
stream.next(); | ||||
} else { | ||||
stream.match(/^.[^\\\"\']*/); | ||||
} | ||||
} | ||||
return state.lhs ? "property string" : "string"; // Token style | ||||
case stateType.comment: | ||||
while (state.stack[0] === stateType.comment && !stream.eol()) { | ||||
if (state.commentType === commentType.slash && stream.match(/\*\//)) { | ||||
state.stack.shift(); // Clear flag | ||||
state.commentType = null; | ||||
} else if (state.commentType === commentType.parenthesis && stream.match(/\*\)/)) { | ||||
state.stack.shift(); // Clear flag | ||||
state.commentType = null; | ||||
} else { | ||||
stream.match(/^.[^\*]*/); | ||||
} | ||||
} | ||||
return "comment"; | ||||
case stateType.characterClass: | ||||
while (state.stack[0] === stateType.characterClass && !stream.eol()) { | ||||
if (!(stream.match(/^[^\]\\]+/) || stream.match(/^\\./))) { | ||||
state.stack.shift(); | ||||
} | ||||
} | ||||
return "operator"; | ||||
} | ||||
var peek = stream.peek(); | ||||
if (bracesMode !== null && (state.braced || peek === "{")) { | ||||
if (state.localState === null) | ||||
state.localState = bracesMode.startState(); | ||||
var token = bracesMode.token(stream, state.localState), | ||||
text = stream.current(); | ||||
if (!token) { | ||||
for (var i = 0; i < text.length; i++) { | ||||
if (text[i] === "{") { | ||||
if (state.braced === 0) { | ||||
token = "matchingbracket"; | ||||
} | ||||
state.braced++; | ||||
} else if (text[i] === "}") { | ||||
state.braced--; | ||||
if (state.braced === 0) { | ||||
token = "matchingbracket"; | ||||
} | ||||
} | ||||
} | ||||
} | ||||
return token; | ||||
} | ||||
//no stack | ||||
switch (peek) { | ||||
case "[": | ||||
stream.next(); | ||||
state.stack.unshift(stateType.characterClass); | ||||
return "bracket"; | ||||
case ":": | ||||
case "|": | ||||
case ";": | ||||
stream.next(); | ||||
return "operator"; | ||||
case "%": | ||||
if (stream.match("%%")) { | ||||
return "header"; | ||||
} else if (stream.match(/[%][A-Za-z]+/)) { | ||||
return "keyword"; | ||||
} else if (stream.match(/[%][}]/)) { | ||||
return "matchingbracket"; | ||||
} | ||||
break; | ||||
case "/": | ||||
if (stream.match(/[\/][A-Za-z]+/)) { | ||||
return "keyword"; | ||||
} | ||||
case "\\": | ||||
if (stream.match(/[\][a-z]+/)) { | ||||
return "string-2"; | ||||
} | ||||
case ".": | ||||
if (stream.match(".")) { | ||||
return "atom"; | ||||
} | ||||
case "*": | ||||
case "-": | ||||
case "+": | ||||
case "^": | ||||
if (stream.match(peek)) { | ||||
return "atom"; | ||||
} | ||||
case "$": | ||||
if (stream.match("$$")) { | ||||
return "builtin"; | ||||
} else if (stream.match(/[$][0-9]+/)) { | ||||
return "variable-3"; | ||||
} | ||||
case "<": | ||||
if (stream.match(/<<[a-zA-Z_]+>>/)) { | ||||
return "builtin"; | ||||
} | ||||
} | ||||
if (stream.match(/^\/\//)) { | ||||
stream.skipToEnd(); | ||||
return "comment"; | ||||
} else if (stream.match(/return/)) { | ||||
return "operator"; | ||||
} else if (stream.match(/^[a-zA-Z_][a-zA-Z0-9_]*/)) { | ||||
if (stream.match(/(?=[\(.])/)) { | ||||
return "variable"; | ||||
} else if (stream.match(/(?=[\s\n]*[:=])/)) { | ||||
return "def"; | ||||
} | ||||
return "variable-2"; | ||||
} else if (["[", "]", "(", ")"].indexOf(stream.peek()) != -1) { | ||||
stream.next(); | ||||
return "bracket"; | ||||
} else if (!stream.eatSpace()) { | ||||
stream.next(); | ||||
} | ||||
return null; | ||||
} | ||||
}; | ||||
}); | ||||
CodeMirror.defineMIME("text/x-ebnf", "ebnf"); | ||||
}); | ||||