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// CodeMirror, copyright (c) by Marijn Haverbeke and others // Distributed under an MIT license: https://codemirror.net/LICENSE /** * Author: Koh Zi Han, based on implementation by Koh Zi Chun */ (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("scheme", function () { var BUILTIN = "builtin", COMMENT = "comment", STRING = "string", ATOM = "atom", NUMBER = "number", BRACKET = "bracket"; var INDENT_WORD_SKIP = 2; function makeKeywords(str) { var obj = {}, words = str.split(" "); for (var i = 0; i < words.length; ++i) obj[words[i]] = true; return obj; } 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?"); 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"); function stateStack(indent, type, prev) { // represents a state stack object this.indent = indent; this.type = type; this.prev = prev; } function pushStack(state, indent, type) { state.indentStack = new stateStack(indent, type, state.indentStack); } function popStack(state) { state.indentStack = state.indentStack.prev; } var binaryMatcher = new RegExp(/^(?:[-+]i|[-+][01]+#*(?:\/[01]+#*)?i|[-+]?[01]+#*(?:\/[01]+#*)?@[-+]?[01]+#*(?:\/[01]+#*)?|[-+]?[01]+#*(?:\/[01]+#*)?[-+](?:[01]+#*(?:\/[01]+#*)?)?i|[-+]?[01]+#*(?:\/[01]+#*)?)(?=[()\s;"]|$)/i); var octalMatcher = new RegExp(/^(?:[-+]i|[-+][0-7]+#*(?:\/[0-7]+#*)?i|[-+]?[0-7]+#*(?:\/[0-7]+#*)?@[-+]?[0-7]+#*(?:\/[0-7]+#*)?|[-+]?[0-7]+#*(?:\/[0-7]+#*)?[-+](?:[0-7]+#*(?:\/[0-7]+#*)?)?i|[-+]?[0-7]+#*(?:\/[0-7]+#*)?)(?=[()\s;"]|$)/i); 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;"]|$)/i); var decimalMatcher = new RegExp(/^(?:[-+]i|[-+](?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)i|[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)@[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)|[-+]?(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)[-+](?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*)?i|(?:(?:(?:\d+#+\.?#*|\d+\.\d*#*|\.\d+#*|\d+)(?:[esfdl][-+]?\d+)?)|\d+#*\/\d+#*))(?=[()\s;"]|$)/i); function isBinaryNumber (stream) { return stream.match(binaryMatcher); } function isOctalNumber (stream) { return stream.match(octalMatcher); } function isDecimalNumber (stream, backup) { if (backup === true) { stream.backUp(1); } return stream.match(decimalMatcher); } function isHexNumber (stream) { return stream.match(hexMatcher); } return { startState: function () { return { indentStack: null, indentation: 0, mode: false, sExprComment: false, sExprQuote: false }; }, token: function (stream, state) { if (state.indentStack == null && stream.sol()) { // update indentation, but only if indentStack is empty state.indentation = stream.indentation(); } // skip spaces if (stream.eatSpace()) { return null; } var returnType = null; switch(state.mode){ case "string": // multi-line string parsing mode var next, escaped = false; while ((next = stream.next()) != null) { if (next == "\"" && !escaped) { state.mode = false; break; } escaped = !escaped && next == "\\"; } returnType = STRING; // continue on in scheme-string mode break; case "comment": // comment parsing mode var next, maybeEnd = false; while ((next = stream.next()) != null) { if (next == "#" && maybeEnd) { state.mode = false; break; } maybeEnd = (next == "|"); } returnType = COMMENT; break; case "s-expr-comment": // s-expr commenting mode state.mode = false; if(stream.peek() == "(" || stream.peek() == "["){ // actually start scheme s-expr commenting mode state.sExprComment = 0; }else{ // if not we just comment the entire of the next token stream.eatWhile(/[^\s\(\)\[\]]/); // eat symbol atom returnType = COMMENT; break; } default: // default parsing mode var ch = stream.next(); if (ch == "\"") { state.mode = "string"; returnType = STRING; } else if (ch == "'") { if (stream.peek() == "(" || stream.peek() == "["){ if (typeof state.sExprQuote != "number") { state.sExprQuote = 0; } // else already in a quoted expression returnType = ATOM; } else { stream.eatWhile(/[\w_\-!$%&*+\.\/:<=>?@\^~]/); returnType = ATOM; } } else if (ch == '#') { if (stream.eat("|")) { // Multi-line comment state.mode = "comment"; // toggle to comment mode returnType = COMMENT; } else if (stream.eat(/[tf]/i)) { // #t/#f (atom) returnType = ATOM; } else if (stream.eat(';')) { // S-Expr comment state.mode = "s-expr-comment"; returnType = COMMENT; } else { var numTest = null, hasExactness = false, hasRadix = true; if (stream.eat(/[ei]/i)) { hasExactness = true; } else { stream.backUp(1); // must be radix specifier } if (stream.match(/^#b/i)) { numTest = isBinaryNumber; } else if (stream.match(/^#o/i)) { numTest = isOctalNumber; } else if (stream.match(/^#x/i)) { numTest = isHexNumber; } else if (stream.match(/^#d/i)) { numTest = isDecimalNumber; } else if (stream.match(/^[-+0-9.]/, false)) { hasRadix = false; numTest = isDecimalNumber; // re-consume the initial # if all matches failed } else if (!hasExactness) { stream.eat('#'); } if (numTest != null) { if (hasRadix && !hasExactness) { // consume optional exactness after radix stream.match(/^#[ei]/i); } if (numTest(stream)) returnType = NUMBER; } } } else if (/^[-+0-9.]/.test(ch) && isDecimalNumber(stream, true)) { // match non-prefixed number, must be decimal returnType = NUMBER; } else if (ch == ";") { // comment stream.skipToEnd(); // rest of the line is a comment returnType = COMMENT; } else if (ch == "(" || ch == "[") { var keyWord = ''; var indentTemp = stream.column(), letter; /** Either (indent-word .. (non-indent-word .. (;something else, bracket, etc. */ while ((letter = stream.eat(/[^\s\(\[\;\)\]]/)) != null) { keyWord += letter; } if (keyWord.length > 0 && indentKeys.propertyIsEnumerable(keyWord)) { // indent-word pushStack(state, indentTemp + INDENT_WORD_SKIP, ch); } else { // non-indent word // we continue eating the spaces stream.eatSpace(); if (stream.eol() || stream.peek() == ";") { // nothing significant after // we restart indentation 1 space after pushStack(state, indentTemp + 1, ch); } else { pushStack(state, indentTemp + stream.current().length, ch); // else we match } } stream.backUp(stream.current().length - 1); // undo all the eating if(typeof state.sExprComment == "number") state.sExprComment++; if(typeof state.sExprQuote == "number") state.sExprQuote++; returnType = BRACKET; } else if (ch == ")" || ch == "]") { returnType = BRACKET; if (state.indentStack != null && state.indentStack.type == (ch == ")" ? "(" : "[")) { popStack(state); if(typeof state.sExprComment == "number"){ if(--state.sExprComment == 0){ returnType = COMMENT; // final closing bracket state.sExprComment = false; // turn off s-expr commenting mode } } if(typeof state.sExprQuote == "number"){ if(--state.sExprQuote == 0){ returnType = ATOM; // final closing bracket state.sExprQuote = false; // turn off s-expr quote mode } } } } else { stream.eatWhile(/[\w_\-!$%&*+\.\/:<=>?@\^~]/); if (keywords && keywords.propertyIsEnumerable(stream.current())) { returnType = BUILTIN; } else returnType = "variable"; } } return (typeof state.sExprComment == "number") ? COMMENT : ((typeof state.sExprQuote == "number") ? ATOM : returnType); }, indent: function (state) { if (state.indentStack == null) return state.indentation; return state.indentStack.indent; }, closeBrackets: {pairs: "()[]{}\"\""}, lineComment: ";;" }; }); CodeMirror.defineMIME("text/x-scheme", "scheme"); });