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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 /**
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5 * Author: Koh Zi Han, based on implementation by Koh Zi Chun
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6 * Improved by: Jakub T. Jankiewicz
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7 */
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8
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9 (function(mod) {
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10 if (typeof exports == "object" && typeof module == "object") // CommonJS
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11 mod(require("../../lib/codemirror"));
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12 else if (typeof define == "function" && define.amd) // AMD
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13 define(["../../lib/codemirror"], mod);
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14 else // Plain browser env
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15 mod(CodeMirror);
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16 })(function(CodeMirror) {
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17 "use strict";
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18
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19 CodeMirror.defineMode("scheme", function () {
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20 var BUILTIN = "builtin", COMMENT = "comment", STRING = "string",
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21 SYMBOL = "symbol", ATOM = "atom", NUMBER = "number", BRACKET = "bracket";
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22 var INDENT_WORD_SKIP = 2;
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23
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24 function makeKeywords(str) {
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25 var obj = {}, words = str.split(" ");
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26 for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
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27 return obj;
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28 }
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29
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30 var keywords = makeKeywords("λ case-lambda call/cc class cond-expand define-class define-values exit-handler field import inherit init-field interface let*-values let-values let/ec mixin opt-lambda override protect provide public rename require require-for-syntax syntax syntax-case syntax-error unit/sig unless when with-syntax and begin call-with-current-continuation call-with-input-file call-with-output-file case cond define define-syntax define-macro defmacro delay do dynamic-wind else for-each if lambda let let* let-syntax letrec letrec-syntax map or syntax-rules abs acos angle append apply asin assoc assq assv atan boolean? caar cadr call-with-input-file call-with-output-file call-with-values car cdddar cddddr cdr ceiling char->integer char-alphabetic? char-ci<=? char-ci<? char-ci=? char-ci>=? char-ci>? char-downcase char-lower-case? char-numeric? char-ready? char-upcase char-upper-case? char-whitespace? char<=? char<? char=? char>=? char>? char? close-input-port close-output-port complex? cons cos current-input-port current-output-port denominator display eof-object? eq? equal? eqv? eval even? exact->inexact exact? exp expt #f floor force gcd imag-part inexact->exact inexact? input-port? integer->char integer? interaction-environment lcm length list list->string list->vector list-ref list-tail list? load log magnitude make-polar make-rectangular make-string make-vector max member memq memv min modulo negative? newline not null-environment null? number->string number? numerator odd? open-input-file open-output-file output-port? pair? peek-char port? positive? procedure? quasiquote quote quotient rational? rationalize read read-char real-part real? remainder reverse round scheme-report-environment set! set-car! set-cdr! sin sqrt string string->list string->number string->symbol string-append string-ci<=? string-ci<? string-ci=? string-ci>=? string-ci>? string-copy string-fill! string-length string-ref string-set! string<=? string<? string=? string>=? string>? string? substring symbol->string symbol? #t tan transcript-off transcript-on truncate values vector vector->list vector-fill! vector-length vector-ref vector-set! with-input-from-file with-output-to-file write write-char zero?");
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31 var indentKeys = makeKeywords("define let letrec let* lambda define-macro defmacro let-syntax letrec-syntax let-values let*-values define-syntax syntax-rules define-values when unless");
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32
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33 function stateStack(indent, type, prev) { // represents a state stack object
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34 this.indent = indent;
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35 this.type = type;
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36 this.prev = prev;
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37 }
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38
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39 function pushStack(state, indent, type) {
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40 state.indentStack = new stateStack(indent, type, state.indentStack);
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41 }
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42
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43 function popStack(state) {
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44 state.indentStack = state.indentStack.prev;
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45 }
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46
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47 var binaryMatcher = new RegExp(/^(?:[-+]i|[-+][01]+#*(?:\/[01]+#*)?i|[-+]?[01]+#*(?:\/[01]+#*)?@[-+]?[01]+#*(?:\/[01]+#*)?|[-+]?[01]+#*(?:\/[01]+#*)?[-+](?:[01]+#*(?:\/[01]+#*)?)?i|[-+]?[01]+#*(?:\/[01]+#*)?)(?=[()\s;"]|$)/i);
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48 var octalMatcher = new RegExp(/^(?:[-+]i|[-+][0-7]+#*(?:\/[0-7]+#*)?i|[-+]?[0-7]+#*(?:\/[0-7]+#*)?@[-+]?[0-7]+#*(?:\/[0-7]+#*)?|[-+]?[0-7]+#*(?:\/[0-7]+#*)?[-+](?:[0-7]+#*(?:\/[0-7]+#*)?)?i|[-+]?[0-7]+#*(?:\/[0-7]+#*)?)(?=[()\s;"]|$)/i);
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49 var hexMatcher = new RegExp(/^(?:[-+]i|[-+][\da-f]+#*(?:\/[\da-f]+#*)?i|[-+]?[\da-f]+#*(?:\/[\da-f]+#*)?@[-+]?[\da-f]+#*(?:\/[\da-f]+#*)?|[-+]?[\da-f]+#*(?:\/[\da-f]+#*)?[-+](?:[\da-f]+#*(?:\/[\da-f]+#*)?)?i|[-+]?[\da-f]+#*(?:\/[\da-f]+#*)?)(?=[()\s;"]|$)/i);
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50 var decimalMatcher = new RegExp(/^(?:[-+]i|[-+](?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)i|[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)@[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)|[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)[-+](?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)?i|(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*))(?=[()\s;"]|$)/i);
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51
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52 function isBinaryNumber (stream) {
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53 return stream.match(binaryMatcher);
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54 }
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55
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56 function isOctalNumber (stream) {
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57 return stream.match(octalMatcher);
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58 }
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59
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60 function isDecimalNumber (stream, backup) {
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61 if (backup === true) {
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62 stream.backUp(1);
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63 }
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64 return stream.match(decimalMatcher);
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65 }
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66
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67 function isHexNumber (stream) {
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68 return stream.match(hexMatcher);
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69 }
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70
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71 function processEscapedSequence(stream, options) {
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72 var next, escaped = false;
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73 while ((next = stream.next()) != null) {
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74 if (next == options.token && !escaped) {
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75
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76 options.state.mode = false;
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77 break;
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78 }
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79 escaped = !escaped && next == "\\";
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80 }
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81 }
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82
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83 return {
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84 startState: function () {
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85 return {
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86 indentStack: null,
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87 indentation: 0,
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88 mode: false,
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89 sExprComment: false,
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90 sExprQuote: false
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91 };
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92 },
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93
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94 token: function (stream, state) {
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95 if (state.indentStack == null && stream.sol()) {
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96 // update indentation, but only if indentStack is empty
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97 state.indentation = stream.indentation();
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98 }
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99
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100 // skip spaces
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101 if (stream.eatSpace()) {
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102 return null;
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103 }
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104 var returnType = null;
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105
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106 switch(state.mode){
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107 case "string": // multi-line string parsing mode
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108 processEscapedSequence(stream, {
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109 token: "\"",
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110 state: state
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111 });
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112 returnType = STRING; // continue on in scheme-string mode
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113 break;
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114 case "symbol": // escape symbol
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115 processEscapedSequence(stream, {
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116 token: "|",
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117 state: state
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118 });
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119 returnType = SYMBOL; // continue on in scheme-symbol mode
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120 break;
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121 case "comment": // comment parsing mode
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122 var next, maybeEnd = false;
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123 while ((next = stream.next()) != null) {
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124 if (next == "#" && maybeEnd) {
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125
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126 state.mode = false;
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127 break;
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128 }
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129 maybeEnd = (next == "|");
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130 }
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131 returnType = COMMENT;
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132 break;
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133 case "s-expr-comment": // s-expr commenting mode
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134 state.mode = false;
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135 if(stream.peek() == "(" || stream.peek() == "["){
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136 // actually start scheme s-expr commenting mode
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137 state.sExprComment = 0;
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138 }else{
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139 // if not we just comment the entire of the next token
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140 stream.eatWhile(/[^\s\(\)\[\]]/); // eat symbol atom
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141 returnType = COMMENT;
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142 break;
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143 }
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144 default: // default parsing mode
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145 var ch = stream.next();
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146
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147 if (ch == "\"") {
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148 state.mode = "string";
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149 returnType = STRING;
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150
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151 } else if (ch == "'") {
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152 if (stream.peek() == "(" || stream.peek() == "["){
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153 if (typeof state.sExprQuote != "number") {
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154 state.sExprQuote = 0;
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155 } // else already in a quoted expression
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156 returnType = ATOM;
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157 } else {
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158 stream.eatWhile(/[\w_\-!$%&*+\.\/:<=>?@\^~]/);
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159 returnType = ATOM;
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160 }
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161 } else if (ch == '|') {
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162 state.mode = "symbol";
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163 returnType = SYMBOL;
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164 } else if (ch == '#') {
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165 if (stream.eat("|")) { // Multi-line comment
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166 state.mode = "comment"; // toggle to comment mode
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167 returnType = COMMENT;
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168 } else if (stream.eat(/[tf]/i)) { // #t/#f (atom)
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169 returnType = ATOM;
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170 } else if (stream.eat(';')) { // S-Expr comment
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171 state.mode = "s-expr-comment";
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172 returnType = COMMENT;
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173 } else {
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174 var numTest = null, hasExactness = false, hasRadix = true;
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175 if (stream.eat(/[ei]/i)) {
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176 hasExactness = true;
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177 } else {
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178 stream.backUp(1); // must be radix specifier
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179 }
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180 if (stream.match(/^#b/i)) {
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181 numTest = isBinaryNumber;
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182 } else if (stream.match(/^#o/i)) {
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183 numTest = isOctalNumber;
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184 } else if (stream.match(/^#x/i)) {
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185 numTest = isHexNumber;
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186 } else if (stream.match(/^#d/i)) {
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187 numTest = isDecimalNumber;
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188 } else if (stream.match(/^[-+0-9.]/, false)) {
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189 hasRadix = false;
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190 numTest = isDecimalNumber;
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191 // re-consume the initial # if all matches failed
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192 } else if (!hasExactness) {
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193 stream.eat('#');
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194 }
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195 if (numTest != null) {
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196 if (hasRadix && !hasExactness) {
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197 // consume optional exactness after radix
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198 stream.match(/^#[ei]/i);
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199 }
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200 if (numTest(stream))
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201 returnType = NUMBER;
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202 }
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203 }
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204 } else if (/^[-+0-9.]/.test(ch) && isDecimalNumber(stream, true)) { // match non-prefixed number, must be decimal
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205 returnType = NUMBER;
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206 } else if (ch == ";") { // comment
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207 stream.skipToEnd(); // rest of the line is a comment
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208 returnType = COMMENT;
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209 } else if (ch == "(" || ch == "[") {
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210 var keyWord = ''; var indentTemp = stream.column(), letter;
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211 /**
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212 Either
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213 (indent-word ..
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214 (non-indent-word ..
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215 (;something else, bracket, etc.
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216 */
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217
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218 while ((letter = stream.eat(/[^\s\(\[\;\)\]]/)) != null) {
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219 keyWord += letter;
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220 }
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221
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222 if (keyWord.length > 0 && indentKeys.propertyIsEnumerable(keyWord)) { // indent-word
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223
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224 pushStack(state, indentTemp + INDENT_WORD_SKIP, ch);
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225 } else { // non-indent word
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226 // we continue eating the spaces
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227 stream.eatSpace();
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228 if (stream.eol() || stream.peek() == ";") {
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229 // nothing significant after
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230 // we restart indentation 1 space after
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231 pushStack(state, indentTemp + 1, ch);
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232 } else {
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233 pushStack(state, indentTemp + stream.current().length, ch); // else we match
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234 }
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235 }
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236 stream.backUp(stream.current().length - 1); // undo all the eating
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237
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238 if(typeof state.sExprComment == "number") state.sExprComment++;
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239 if(typeof state.sExprQuote == "number") state.sExprQuote++;
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240
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241 returnType = BRACKET;
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242 } else if (ch == ")" || ch == "]") {
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243 returnType = BRACKET;
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244 if (state.indentStack != null && state.indentStack.type == (ch == ")" ? "(" : "[")) {
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245 popStack(state);
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246
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247 if(typeof state.sExprComment == "number"){
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248 if(--state.sExprComment == 0){
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249 returnType = COMMENT; // final closing bracket
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250 state.sExprComment = false; // turn off s-expr commenting mode
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251 }
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252 }
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253 if(typeof state.sExprQuote == "number"){
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254 if(--state.sExprQuote == 0){
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255 returnType = ATOM; // final closing bracket
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256 state.sExprQuote = false; // turn off s-expr quote mode
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257 }
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258 }
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259 }
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260 } else {
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261 stream.eatWhile(/[\w_\-!$%&*+\.\/:<=>?@\^~]/);
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262
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263 if (keywords && keywords.propertyIsEnumerable(stream.current())) {
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264 returnType = BUILTIN;
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265 } else returnType = "variable";
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266 }
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267 }
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268 return (typeof state.sExprComment == "number") ? COMMENT : ((typeof state.sExprQuote == "number") ? ATOM : returnType);
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269 },
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270
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271 indent: function (state) {
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272 if (state.indentStack == null) return state.indentation;
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273 return state.indentStack.indent;
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274 },
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275
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276 fold: "brace-paren",
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277 closeBrackets: {pairs: "()[]{}\"\""},
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278 lineComment: ";;"
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279 };
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280 });
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281
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282 CodeMirror.defineMIME("text/x-scheme", "scheme");
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283
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284 });
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