assets/javascripts/codemirror/mode/ruby/ruby.js
CodeMirror.defineMode("ruby", function(config) {
function wordObj(words) {
var o = {};
for (var i = 0, e = words.length; i < e; ++i) o[words[i]] = true;
return o;
}
var keywords = wordObj([
"alias", "and", "BEGIN", "begin", "break", "case", "class", "def", "defined?", "do", "else",
"elsif", "END", "end", "ensure", "false", "for", "if", "in", "module", "next", "not", "or",
"redo", "rescue", "retry", "return", "self", "super", "then", "true", "undef", "unless",
"until", "when", "while", "yield", "nil", "raise", "throw", "catch", "fail", "loop", "callcc",
"caller", "lambda", "proc", "public", "protected", "private", "require", "load",
"require_relative", "extend", "autoload", "__END__", "__FILE__", "__LINE__", "__dir__"
]);
var indentWords = wordObj(["def", "class", "case", "for", "while", "do", "module", "then",
"catch", "loop", "proc", "begin"]);
var dedentWords = wordObj(["end", "until"]);
var matching = {"[": "]", "{": "}", "(": ")"};
var curPunc;
function chain(newtok, stream, state) {
state.tokenize.push(newtok);
return newtok(stream, state);
}
function tokenBase(stream, state) {
curPunc = null;
if (stream.sol() && stream.match("=begin") && stream.eol()) {
state.tokenize.push(readBlockComment);
return "comment";
}
if (stream.eatSpace()) return null;
var ch = stream.next(), m;
if (ch == "`" || ch == "'" || ch == '"') {
return chain(readQuoted(ch, "string", ch == '"' || ch == "`"), stream, state);
} else if (ch == "/" && !stream.eol() && stream.peek() != " ") {
return chain(readQuoted(ch, "string-2", true), stream, state);
} else if (ch == "%") {
var style = "string", embed = true;
if (stream.eat("s")) style = "atom";
else if (stream.eat(/[WQ]/)) style = "string";
else if (stream.eat(/[r]/)) style = "string-2";
else if (stream.eat(/[wxq]/)) { style = "string"; embed = false; }
var delim = stream.eat(/[^\w\s]/);
if (!delim) return "operator";
if (matching.propertyIsEnumerable(delim)) delim = matching[delim];
return chain(readQuoted(delim, style, embed, true), stream, state);
} else if (ch == "#") {
stream.skipToEnd();
return "comment";
} else if (ch == "<" && (m = stream.match(/^<-?[\`\"\']?([a-zA-Z_?]\w*)[\`\"\']?(?:;|$)/))) {
return chain(readHereDoc(m[1]), stream, state);
} else if (ch == "0") {
if (stream.eat("x")) stream.eatWhile(/[\da-fA-F]/);
else if (stream.eat("b")) stream.eatWhile(/[01]/);
else stream.eatWhile(/[0-7]/);
return "number";
} else if (/\d/.test(ch)) {
stream.match(/^[\d_]*(?:\.[\d_]+)?(?:[eE][+\-]?[\d_]+)?/);
return "number";
} else if (ch == "?") {
while (stream.match(/^\\[CM]-/)) {}
if (stream.eat("\\")) stream.eatWhile(/\w/);
else stream.next();
return "string";
} else if (ch == ":") {
if (stream.eat("'")) return chain(readQuoted("'", "atom", false), stream, state);
if (stream.eat('"')) return chain(readQuoted('"', "atom", true), stream, state);
// :> :>> :< :<< are valid symbols
if (stream.eat(/[\<\>]/)) {
stream.eat(/[\<\>]/);
return "atom";
}
// :+ :- :/ :* :| :& :! are valid symbols
if (stream.eat(/[\+\-\*\/\&\|\:\!]/)) {
return "atom";
}
// Symbols can't start by a digit
if (stream.eat(/[a-zA-Z$@_]/)) {
stream.eatWhile(/[\w]/);
// Only one ? ! = is allowed and only as the last character
stream.eat(/[\?\!\=]/);
return "atom";
}
return "operator";
} else if (ch == "@" && stream.match(/^@?[a-zA-Z_]/)) {
stream.eat("@");
stream.eatWhile(/[\w]/);
return "variable-2";
} else if (ch == "$") {
if (stream.eat(/[a-zA-Z_]/)) {
stream.eatWhile(/[\w]/);
} else if (stream.eat(/\d/)) {
stream.eat(/\d/);
} else {
stream.next(); // Must be a special global like $: or $!
}
return "variable-3";
} else if (/[a-zA-Z_]/.test(ch)) {
stream.eatWhile(/[\w]/);
stream.eat(/[\?\!]/);
if (stream.eat(":")) return "atom";
return "ident";
} else if (ch == "|" && (state.varList || state.lastTok == "{" || state.lastTok == "do")) {
curPunc = "|";
return null;
} else if (/[\(\)\[\]{}\\;]/.test(ch)) {
curPunc = ch;
return null;
} else if (ch == "-" && stream.eat(">")) {
return "arrow";
} else if (/[=+\-\/*:\.^%<>~|]/.test(ch)) {
stream.eatWhile(/[=+\-\/*:\.^%<>~|]/);
return "operator";
} else {
return null;
}
}
function tokenBaseUntilBrace() {
var depth = 1;
return function(stream, state) {
if (stream.peek() == "}") {
depth--;
if (depth == 0) {
state.tokenize.pop();
return state.tokenize[state.tokenize.length-1](stream, state);
}
} else if (stream.peek() == "{") {
depth++;
}
return tokenBase(stream, state);
};
}
function tokenBaseOnce() {
var alreadyCalled = false;
return function(stream, state) {
if (alreadyCalled) {
state.tokenize.pop();
return state.tokenize[state.tokenize.length-1](stream, state);
}
alreadyCalled = true;
return tokenBase(stream, state);
};
}
function readQuoted(quote, style, embed, unescaped) {
return function(stream, state) {
var escaped = false, ch;
if (state.context.type === 'read-quoted-paused') {
state.context = state.context.prev;
stream.eat("}");
}
while ((ch = stream.next()) != null) {
if (ch == quote && (unescaped || !escaped)) {
state.tokenize.pop();
break;
}
if (embed && ch == "#" && !escaped) {
if (stream.eat("{")) {
if (quote == "}") {
state.context = {prev: state.context, type: 'read-quoted-paused'};
}
state.tokenize.push(tokenBaseUntilBrace());
break;
} else if (/[@\$]/.test(stream.peek())) {
state.tokenize.push(tokenBaseOnce());
break;
}
}
escaped = !escaped && ch == "\\";
}
return style;
};
}
function readHereDoc(phrase) {
return function(stream, state) {
if (stream.match(phrase)) state.tokenize.pop();
else stream.skipToEnd();
return "string";
};
}
function readBlockComment(stream, state) {
if (stream.sol() && stream.match("=end") && stream.eol())
state.tokenize.pop();
stream.skipToEnd();
return "comment";
}
return {
startState: function() {
return {tokenize: [tokenBase],
indented: 0,
context: {type: "top", indented: -config.indentUnit},
continuedLine: false,
lastTok: null,
varList: false};
},
token: function(stream, state) {
if (stream.sol()) state.indented = stream.indentation();
var style = state.tokenize[state.tokenize.length-1](stream, state), kwtype;
if (style == "ident") {
var word = stream.current();
style = keywords.propertyIsEnumerable(stream.current()) ? "keyword"
: /^[A-Z]/.test(word) ? "tag"
: (state.lastTok == "def" || state.lastTok == "class" || state.varList) ? "def"
: "variable";
if (indentWords.propertyIsEnumerable(word)) kwtype = "indent";
else if (dedentWords.propertyIsEnumerable(word)) kwtype = "dedent";
else if ((word == "if" || word == "unless") && stream.column() == stream.indentation())
kwtype = "indent";
}
if (curPunc || (style && style != "comment")) state.lastTok = word || curPunc || style;
if (curPunc == "|") state.varList = !state.varList;
if (kwtype == "indent" || /[\(\[\{]/.test(curPunc))
state.context = {prev: state.context, type: curPunc || style, indented: state.indented};
else if ((kwtype == "dedent" || /[\)\]\}]/.test(curPunc)) && state.context.prev)
state.context = state.context.prev;
if (stream.eol())
state.continuedLine = (curPunc == "\\" || style == "operator");
return style;
},
indent: function(state, textAfter) {
if (state.tokenize[state.tokenize.length-1] != tokenBase) return 0;
var firstChar = textAfter && textAfter.charAt(0);
var ct = state.context;
var closing = ct.type == matching[firstChar] ||
ct.type == "keyword" && /^(?:end|until|else|elsif|when|rescue)\b/.test(textAfter);
return ct.indented + (closing ? 0 : config.indentUnit) +
(state.continuedLine ? config.indentUnit : 0);
},
electricChars: "}de", // enD and rescuE
lineComment: "#"
};
});
CodeMirror.defineMIME("text/x-ruby", "ruby");