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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function(mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../../lib/codemirror"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror"], mod);
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9 else // Plain browser env
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10 mod(CodeMirror);
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11 })(function(CodeMirror) {
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12 "use strict";
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13
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14 CodeMirror.registerHelper("wordChars", "r", /[\w.]/);
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15
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16 CodeMirror.defineMode("r", function(config) {
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17 function wordObj(words) {
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18 var res = {};
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19 for (var i = 0; i < words.length; ++i) res[words[i]] = true;
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20 return res;
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21 }
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22 var commonAtoms = ["NULL", "NA", "Inf", "NaN", "NA_integer_", "NA_real_", "NA_complex_", "NA_character_", "TRUE", "FALSE"];
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23 var commonBuiltins = ["list", "quote", "bquote", "eval", "return", "call", "parse", "deparse"];
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24 var commonKeywords = ["if", "else", "repeat", "while", "function", "for", "in", "next", "break"];
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25 var commonBlockKeywords = ["if", "else", "repeat", "while", "function", "for"];
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26
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27 CodeMirror.registerHelper("hintWords", "r", commonAtoms.concat(commonBuiltins, commonKeywords));
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28
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29 var atoms = wordObj(commonAtoms);
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30 var builtins = wordObj(commonBuiltins);
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31 var keywords = wordObj(commonKeywords);
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32 var blockkeywords = wordObj(commonBlockKeywords);
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33 var opChars = /[+\-*\/^<>=!&|~$:]/;
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34 var curPunc;
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35
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36 function tokenBase(stream, state) {
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37 curPunc = null;
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38 var ch = stream.next();
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39 if (ch == "#") {
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40 stream.skipToEnd();
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41 return "comment";
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42 } else if (ch == "0" && stream.eat("x")) {
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43 stream.eatWhile(/[\da-f]/i);
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44 return "number";
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45 } else if (ch == "." && stream.eat(/\d/)) {
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46 stream.match(/\d*(?:e[+\-]?\d+)?/);
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47 return "number";
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48 } else if (/\d/.test(ch)) {
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49 stream.match(/\d*(?:\.\d+)?(?:e[+\-]\d+)?L?/);
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50 return "number";
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51 } else if (ch == "'" || ch == '"') {
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52 state.tokenize = tokenString(ch);
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53 return "string";
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54 } else if (ch == "`") {
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55 stream.match(/[^`]+`/);
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56 return "variable-3";
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57 } else if (ch == "." && stream.match(/.(?:[.]|\d+)/)) {
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58 return "keyword";
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59 } else if (/[a-zA-Z\.]/.test(ch)) {
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60 stream.eatWhile(/[\w\.]/);
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61 var word = stream.current();
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62 if (atoms.propertyIsEnumerable(word)) return "atom";
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63 if (keywords.propertyIsEnumerable(word)) {
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64 // Block keywords start new blocks, except 'else if', which only starts
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65 // one new block for the 'if', no block for the 'else'.
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66 if (blockkeywords.propertyIsEnumerable(word) &&
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67 !stream.match(/\s*if(\s+|$)/, false))
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68 curPunc = "block";
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69 return "keyword";
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70 }
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71 if (builtins.propertyIsEnumerable(word)) return "builtin";
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72 return "variable";
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73 } else if (ch == "%") {
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74 if (stream.skipTo("%")) stream.next();
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75 return "operator variable-2";
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76 } else if (
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77 (ch == "<" && stream.eat("-")) ||
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78 (ch == "<" && stream.match("<-")) ||
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79 (ch == "-" && stream.match(/>>?/))
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80 ) {
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81 return "operator arrow";
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82 } else if (ch == "=" && state.ctx.argList) {
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83 return "arg-is";
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84 } else if (opChars.test(ch)) {
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85 if (ch == "$") return "operator dollar";
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86 stream.eatWhile(opChars);
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87 return "operator";
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88 } else if (/[\(\){}\[\];]/.test(ch)) {
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89 curPunc = ch;
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90 if (ch == ";") return "semi";
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91 return null;
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92 } else {
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93 return null;
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94 }
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95 }
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96
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97 function tokenString(quote) {
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98 return function(stream, state) {
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99 if (stream.eat("\\")) {
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100 var ch = stream.next();
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101 if (ch == "x") stream.match(/^[a-f0-9]{2}/i);
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102 else if ((ch == "u" || ch == "U") && stream.eat("{") && stream.skipTo("}")) stream.next();
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103 else if (ch == "u") stream.match(/^[a-f0-9]{4}/i);
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104 else if (ch == "U") stream.match(/^[a-f0-9]{8}/i);
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105 else if (/[0-7]/.test(ch)) stream.match(/^[0-7]{1,2}/);
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106 return "string-2";
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107 } else {
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108 var next;
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109 while ((next = stream.next()) != null) {
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110 if (next == quote) { state.tokenize = tokenBase; break; }
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111 if (next == "\\") { stream.backUp(1); break; }
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112 }
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113 return "string";
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114 }
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115 };
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116 }
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117
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118 var ALIGN_YES = 1, ALIGN_NO = 2, BRACELESS = 4
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119
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120 function push(state, type, stream) {
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121 state.ctx = {type: type,
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122 indent: state.indent,
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123 flags: 0,
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124 column: stream.column(),
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125 prev: state.ctx};
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126 }
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127 function setFlag(state, flag) {
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128 var ctx = state.ctx
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129 state.ctx = {type: ctx.type,
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130 indent: ctx.indent,
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131 flags: ctx.flags | flag,
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132 column: ctx.column,
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133 prev: ctx.prev}
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134 }
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135 function pop(state) {
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136 state.indent = state.ctx.indent;
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137 state.ctx = state.ctx.prev;
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138 }
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139
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140 return {
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141 startState: function() {
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142 return {tokenize: tokenBase,
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143 ctx: {type: "top",
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144 indent: -config.indentUnit,
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145 flags: ALIGN_NO},
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146 indent: 0,
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147 afterIdent: false};
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148 },
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149
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150 token: function(stream, state) {
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151 if (stream.sol()) {
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152 if ((state.ctx.flags & 3) == 0) state.ctx.flags |= ALIGN_NO
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153 if (state.ctx.flags & BRACELESS) pop(state)
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154 state.indent = stream.indentation();
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155 }
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156 if (stream.eatSpace()) return null;
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157 var style = state.tokenize(stream, state);
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158 if (style != "comment" && (state.ctx.flags & ALIGN_NO) == 0) setFlag(state, ALIGN_YES)
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159
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160 if ((curPunc == ";" || curPunc == "{" || curPunc == "}") && state.ctx.type == "block") pop(state);
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161 if (curPunc == "{") push(state, "}", stream);
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162 else if (curPunc == "(") {
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163 push(state, ")", stream);
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164 if (state.afterIdent) state.ctx.argList = true;
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165 }
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166 else if (curPunc == "[") push(state, "]", stream);
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167 else if (curPunc == "block") push(state, "block", stream);
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168 else if (curPunc == state.ctx.type) pop(state);
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169 else if (state.ctx.type == "block" && style != "comment") setFlag(state, BRACELESS)
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170 state.afterIdent = style == "variable" || style == "keyword";
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171 return style;
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172 },
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173
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174 indent: function(state, textAfter) {
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175 if (state.tokenize != tokenBase) return 0;
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176 var firstChar = textAfter && textAfter.charAt(0), ctx = state.ctx,
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177 closing = firstChar == ctx.type;
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178 if (ctx.flags & BRACELESS) ctx = ctx.prev
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179 if (ctx.type == "block") return ctx.indent + (firstChar == "{" ? 0 : config.indentUnit);
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180 else if (ctx.flags & ALIGN_YES) return ctx.column + (closing ? 0 : 1);
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181 else return ctx.indent + (closing ? 0 : config.indentUnit);
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182 },
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183
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184 lineComment: "#"
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185 };
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186 });
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187
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188 CodeMirror.defineMIME("text/x-rsrc", "r");
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189
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190 });
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