scripts/CodeMirror/mode/coffeescript/coffeescript.js (view raw)
1// CodeMirror, copyright (c) by Marijn Haverbeke and others
2// Distributed under an MIT license: https://codemirror.net/LICENSE
3
4/**
5 * Link to the project's GitHub page:
6 * https://github.com/pickhardt/coffeescript-codemirror-mode
7 */
8(function(mod) {
9 if (typeof exports == "object" && typeof module == "object") // CommonJS
10 mod(require("../../lib/codemirror"));
11 else if (typeof define == "function" && define.amd) // AMD
12 define(["../../lib/codemirror"], mod);
13 else // Plain browser env
14 mod(CodeMirror);
15})(function(CodeMirror) {
16"use strict";
17
18CodeMirror.defineMode("coffeescript", function(conf, parserConf) {
19 var ERRORCLASS = "error";
20
21 function wordRegexp(words) {
22 return new RegExp("^((" + words.join(")|(") + "))\\b");
23 }
24
25 var operators = /^(?:->|=>|\+[+=]?|-[\-=]?|\*[\*=]?|\/[\/=]?|[=!]=|<[><]?=?|>>?=?|%=?|&=?|\|=?|\^=?|\~|!|\?|(or|and|\|\||&&|\?)=)/;
26 var delimiters = /^(?:[()\[\]{},:`=;]|\.\.?\.?)/;
27 var identifiers = /^[_A-Za-z$][_A-Za-z$0-9]*/;
28 var atProp = /^@[_A-Za-z$][_A-Za-z$0-9]*/;
29
30 var wordOperators = wordRegexp(["and", "or", "not",
31 "is", "isnt", "in",
32 "instanceof", "typeof"]);
33 var indentKeywords = ["for", "while", "loop", "if", "unless", "else",
34 "switch", "try", "catch", "finally", "class"];
35 var commonKeywords = ["break", "by", "continue", "debugger", "delete",
36 "do", "in", "of", "new", "return", "then",
37 "this", "@", "throw", "when", "until", "extends"];
38
39 var keywords = wordRegexp(indentKeywords.concat(commonKeywords));
40
41 indentKeywords = wordRegexp(indentKeywords);
42
43
44 var stringPrefixes = /^('{3}|\"{3}|['\"])/;
45 var regexPrefixes = /^(\/{3}|\/)/;
46 var commonConstants = ["Infinity", "NaN", "undefined", "null", "true", "false", "on", "off", "yes", "no"];
47 var constants = wordRegexp(commonConstants);
48
49 // Tokenizers
50 function tokenBase(stream, state) {
51 // Handle scope changes
52 if (stream.sol()) {
53 if (state.scope.align === null) state.scope.align = false;
54 var scopeOffset = state.scope.offset;
55 if (stream.eatSpace()) {
56 var lineOffset = stream.indentation();
57 if (lineOffset > scopeOffset && state.scope.type == "coffee") {
58 return "indent";
59 } else if (lineOffset < scopeOffset) {
60 return "dedent";
61 }
62 return null;
63 } else {
64 if (scopeOffset > 0) {
65 dedent(stream, state);
66 }
67 }
68 }
69 if (stream.eatSpace()) {
70 return null;
71 }
72
73 var ch = stream.peek();
74
75 // Handle docco title comment (single line)
76 if (stream.match("####")) {
77 stream.skipToEnd();
78 return "comment";
79 }
80
81 // Handle multi line comments
82 if (stream.match("###")) {
83 state.tokenize = longComment;
84 return state.tokenize(stream, state);
85 }
86
87 // Single line comment
88 if (ch === "#") {
89 stream.skipToEnd();
90 return "comment";
91 }
92
93 // Handle number literals
94 if (stream.match(/^-?[0-9\.]/, false)) {
95 var floatLiteral = false;
96 // Floats
97 if (stream.match(/^-?\d*\.\d+(e[\+\-]?\d+)?/i)) {
98 floatLiteral = true;
99 }
100 if (stream.match(/^-?\d+\.\d*/)) {
101 floatLiteral = true;
102 }
103 if (stream.match(/^-?\.\d+/)) {
104 floatLiteral = true;
105 }
106
107 if (floatLiteral) {
108 // prevent from getting extra . on 1..
109 if (stream.peek() == "."){
110 stream.backUp(1);
111 }
112 return "number";
113 }
114 // Integers
115 var intLiteral = false;
116 // Hex
117 if (stream.match(/^-?0x[0-9a-f]+/i)) {
118 intLiteral = true;
119 }
120 // Decimal
121 if (stream.match(/^-?[1-9]\d*(e[\+\-]?\d+)?/)) {
122 intLiteral = true;
123 }
124 // Zero by itself with no other piece of number.
125 if (stream.match(/^-?0(?![\dx])/i)) {
126 intLiteral = true;
127 }
128 if (intLiteral) {
129 return "number";
130 }
131 }
132
133 // Handle strings
134 if (stream.match(stringPrefixes)) {
135 state.tokenize = tokenFactory(stream.current(), false, "string");
136 return state.tokenize(stream, state);
137 }
138 // Handle regex literals
139 if (stream.match(regexPrefixes)) {
140 if (stream.current() != "/" || stream.match(/^.*\//, false)) { // prevent highlight of division
141 state.tokenize = tokenFactory(stream.current(), true, "string-2");
142 return state.tokenize(stream, state);
143 } else {
144 stream.backUp(1);
145 }
146 }
147
148
149
150 // Handle operators and delimiters
151 if (stream.match(operators) || stream.match(wordOperators)) {
152 return "operator";
153 }
154 if (stream.match(delimiters)) {
155 return "punctuation";
156 }
157
158 if (stream.match(constants)) {
159 return "atom";
160 }
161
162 if (stream.match(atProp) || state.prop && stream.match(identifiers)) {
163 return "property";
164 }
165
166 if (stream.match(keywords)) {
167 return "keyword";
168 }
169
170 if (stream.match(identifiers)) {
171 return "variable";
172 }
173
174 // Handle non-detected items
175 stream.next();
176 return ERRORCLASS;
177 }
178
179 function tokenFactory(delimiter, singleline, outclass) {
180 return function(stream, state) {
181 while (!stream.eol()) {
182 stream.eatWhile(/[^'"\/\\]/);
183 if (stream.eat("\\")) {
184 stream.next();
185 if (singleline && stream.eol()) {
186 return outclass;
187 }
188 } else if (stream.match(delimiter)) {
189 state.tokenize = tokenBase;
190 return outclass;
191 } else {
192 stream.eat(/['"\/]/);
193 }
194 }
195 if (singleline) {
196 if (parserConf.singleLineStringErrors) {
197 outclass = ERRORCLASS;
198 } else {
199 state.tokenize = tokenBase;
200 }
201 }
202 return outclass;
203 };
204 }
205
206 function longComment(stream, state) {
207 while (!stream.eol()) {
208 stream.eatWhile(/[^#]/);
209 if (stream.match("###")) {
210 state.tokenize = tokenBase;
211 break;
212 }
213 stream.eatWhile("#");
214 }
215 return "comment";
216 }
217
218 function indent(stream, state, type) {
219 type = type || "coffee";
220 var offset = 0, align = false, alignOffset = null;
221 for (var scope = state.scope; scope; scope = scope.prev) {
222 if (scope.type === "coffee" || scope.type == "}") {
223 offset = scope.offset + conf.indentUnit;
224 break;
225 }
226 }
227 if (type !== "coffee") {
228 align = null;
229 alignOffset = stream.column() + stream.current().length;
230 } else if (state.scope.align) {
231 state.scope.align = false;
232 }
233 state.scope = {
234 offset: offset,
235 type: type,
236 prev: state.scope,
237 align: align,
238 alignOffset: alignOffset
239 };
240 }
241
242 function dedent(stream, state) {
243 if (!state.scope.prev) return;
244 if (state.scope.type === "coffee") {
245 var _indent = stream.indentation();
246 var matched = false;
247 for (var scope = state.scope; scope; scope = scope.prev) {
248 if (_indent === scope.offset) {
249 matched = true;
250 break;
251 }
252 }
253 if (!matched) {
254 return true;
255 }
256 while (state.scope.prev && state.scope.offset !== _indent) {
257 state.scope = state.scope.prev;
258 }
259 return false;
260 } else {
261 state.scope = state.scope.prev;
262 return false;
263 }
264 }
265
266 function tokenLexer(stream, state) {
267 var style = state.tokenize(stream, state);
268 var current = stream.current();
269
270 // Handle scope changes.
271 if (current === "return") {
272 state.dedent = true;
273 }
274 if (((current === "->" || current === "=>") && stream.eol())
275 || style === "indent") {
276 indent(stream, state);
277 }
278 var delimiter_index = "[({".indexOf(current);
279 if (delimiter_index !== -1) {
280 indent(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
281 }
282 if (indentKeywords.exec(current)){
283 indent(stream, state);
284 }
285 if (current == "then"){
286 dedent(stream, state);
287 }
288
289
290 if (style === "dedent") {
291 if (dedent(stream, state)) {
292 return ERRORCLASS;
293 }
294 }
295 delimiter_index = "])}".indexOf(current);
296 if (delimiter_index !== -1) {
297 while (state.scope.type == "coffee" && state.scope.prev)
298 state.scope = state.scope.prev;
299 if (state.scope.type == current)
300 state.scope = state.scope.prev;
301 }
302 if (state.dedent && stream.eol()) {
303 if (state.scope.type == "coffee" && state.scope.prev)
304 state.scope = state.scope.prev;
305 state.dedent = false;
306 }
307
308 return style;
309 }
310
311 var external = {
312 startState: function(basecolumn) {
313 return {
314 tokenize: tokenBase,
315 scope: {offset:basecolumn || 0, type:"coffee", prev: null, align: false},
316 prop: false,
317 dedent: 0
318 };
319 },
320
321 token: function(stream, state) {
322 var fillAlign = state.scope.align === null && state.scope;
323 if (fillAlign && stream.sol()) fillAlign.align = false;
324
325 var style = tokenLexer(stream, state);
326 if (style && style != "comment") {
327 if (fillAlign) fillAlign.align = true;
328 state.prop = style == "punctuation" && stream.current() == "."
329 }
330
331 return style;
332 },
333
334 indent: function(state, text) {
335 if (state.tokenize != tokenBase) return 0;
336 var scope = state.scope;
337 var closer = text && "])}".indexOf(text.charAt(0)) > -1;
338 if (closer) while (scope.type == "coffee" && scope.prev) scope = scope.prev;
339 var closes = closer && scope.type === text.charAt(0);
340 if (scope.align)
341 return scope.alignOffset - (closes ? 1 : 0);
342 else
343 return (closes ? scope.prev : scope).offset;
344 },
345
346 lineComment: "#",
347 fold: "indent"
348 };
349 return external;
350});
351
352// IANA registered media type
353// https://www.iana.org/assignments/media-types/
354CodeMirror.defineMIME("application/vnd.coffeescript", "coffeescript");
355
356CodeMirror.defineMIME("text/x-coffeescript", "coffeescript");
357CodeMirror.defineMIME("text/coffeescript", "coffeescript");
358
359});