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CodeMirror.defineMode("r", function(config) {
function wordObj(str) {
var words = str.split(" "), res = {};
for (var i = 0; i < words.length; ++i) res[words[i]] = true;
return res;
}
var atoms = wordObj("NULL NA Inf NaN NA_integer_ NA_real_ NA_complex_ NA_character_");
var builtins = wordObj("list quote bquote eval return call parse deparse");
var keywords = wordObj("if else repeat while function for in next break");
var blockkeywords = wordObj("if else repeat while function for");
var opChars = /[+\-*\/^<>=!&|~$:]/;
var curPunc;
function tokenBase(stream, state) {
curPunc = null;
var ch = stream.next();
if (ch == "#") {
stream.skipToEnd();
return "comment";
} else if (ch == "0" && stream.eat("x")) {
stream.eatWhile(/[\da-f]/i);
return "number";
} else if (ch == "." && stream.eat(/\d/)) {
stream.match(/\d*(?:e[+\-]?\d+)?/);
return "number";
} else if (/\d/.test(ch)) {
stream.match(/\d*(?:\.\d+)?(?:e[+\-]\d+)?L?/);
return "number";
} else if (ch == "'" || ch == '"') {
state.tokenize = tokenString(ch);
return "string";
} else if (ch == "." && stream.match(/.[.\d]+/)) {
return "keyword";
} else if (/[\w\.]/.test(ch) && ch != "_") {
stream.eatWhile(/[\w\.]/);
var word = stream.current();
if (atoms.propertyIsEnumerable(word)) return "atom";
if (keywords.propertyIsEnumerable(word)) {
if (blockkeywords.propertyIsEnumerable(word)) curPunc = "block";
return "keyword";
}
if (builtins.propertyIsEnumerable(word)) return "builtin";
return "variable";
} else if (ch == "%") {
if (stream.skipTo("%")) stream.next();
return "variable-2";
} else if (ch == "<" && stream.eat("-")) {
return "arrow";
} else if (ch == "=" && state.ctx.argList) {
return "arg-is";
} else if (opChars.test(ch)) {
if (ch == "$") return "dollar";
stream.eatWhile(opChars);
return "operator";
} else if (/[\(\){}\[\];]/.test(ch)) {
curPunc = ch;
if (ch == ";") return "semi";
return null;
} else {
return null;
}
}
function tokenString(quote) {
return function(stream, state) {
if (stream.eat("\\")) {
var ch = stream.next();
if (ch == "x") stream.match(/^[a-f0-9]{2}/i);
else if ((ch == "u" || ch == "U") && stream.eat("{") && stream.skipTo("}")) stream.next();
else if (ch == "u") stream.match(/^[a-f0-9]{4}/i);
else if (ch == "U") stream.match(/^[a-f0-9]{8}/i);
else if (/[0-7]/.test(ch)) stream.match(/^[0-7]{1,2}/);
return "string-2";
} else {
var next;
while ((next = stream.next()) != null) {
if (next == quote) { state.tokenize = tokenBase; break; }
if (next == "\\") { stream.backUp(1); break; }
}
return "string";
}
};
}
function push(state, type, stream) {
state.ctx = {type: type,
indent: state.indent,
align: null,
column: stream.column(),
prev: state.ctx};
}
function pop(state) {
state.indent = state.ctx.indent;
state.ctx = state.ctx.prev;
}
return {
startState: function(base) {
return {tokenize: tokenBase,
ctx: {type: "top",
indent: -config.indentUnit,
align: false},
indent: 0,
afterIdent: false};
},
token: function(stream, state) {
if (stream.sol()) {
if (state.ctx.align == null) state.ctx.align = false;
state.indent = stream.indentation();
}
if (stream.eatSpace()) return null;
var style = state.tokenize(stream, state);
if (style != "comment" && state.ctx.align == null) state.ctx.align = true;
var ctype = state.ctx.type;
if ((curPunc == ";" || curPunc == "{" || curPunc == "}") && ctype == "block") pop(state);
if (curPunc == "{") push(state, "}", stream);
else if (curPunc == "(") {
push(state, ")", stream);
if (state.afterIdent) state.ctx.argList = true;
}
else if (curPunc == "[") push(state, "]", stream);
else if (curPunc == "block") push(state, "block", stream);
else if (curPunc == ctype) pop(state);
state.afterIdent = style == "variable" || style == "keyword";
return style;
},
indent: function(state, textAfter) {
if (state.tokenize != tokenBase) return 0;
var firstChar = textAfter && textAfter.charAt(0), ctx = state.ctx,
closing = firstChar == ctx.type;
if (ctx.type == "block") return ctx.indent + (firstChar == "{" ? 0 : config.indentUnit);
else if (ctx.align) return ctx.column + (closing ? 0 : 1);
else return ctx.indent + (closing ? 0 : config.indentUnit);
}
};
});
CodeMirror.defineMIME("text/x-rsrc", "r");
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