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scheme.js
249 lines
| 13.1 KiB
| application/javascript
|
JavascriptLexer
r1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others | |||
// Distributed under an MIT license: http://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 define-class 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 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"); | ||||
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 | ||||
}; | ||||
}, | ||||
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 non spaces | ||||
returnType = COMMENT; | ||||
break; | ||||
} | ||||
default: // default parsing mode | ||||
var ch = stream.next(); | ||||
if (ch == "\"") { | ||||
state.mode = "string"; | ||||
returnType = STRING; | ||||
} else if (ch == "'") { | ||||
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 intial # 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++; | ||||
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 | ||||
} | ||||
} | ||||
} | ||||
} else { | ||||
stream.eatWhile(/[\w\$_\-!$%&*+\.\/:<=>?@\^~]/); | ||||
if (keywords && keywords.propertyIsEnumerable(stream.current())) { | ||||
returnType = BUILTIN; | ||||
} else returnType = "variable"; | ||||
} | ||||
} | ||||
return (typeof state.sExprComment == "number") ? COMMENT : returnType; | ||||
}, | ||||
indent: function (state) { | ||||
if (state.indentStack == null) return state.indentation; | ||||
return state.indentStack.indent; | ||||
}, | ||||
closeBrackets: {pairs: "()[]{}\"\""}, | ||||
lineComment: ";;" | ||||
}; | ||||
}); | ||||
CodeMirror.defineMIME("text/x-scheme", "scheme"); | ||||
}); | ||||