1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 | var Lexer = require('./lexer')
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13 | , nodes = require('./nodes')
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14 | , inspect = require('sys').inspect;
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15 |
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16 |
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17 |
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18 |
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19 |
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20 | var selectorTokens = [
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21 | 'ident'
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22 | , 'string'
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23 | , 'selector'
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24 | , 'function'
|
25 | , 'comment'
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26 | , 'space'
|
27 | , 'color'
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28 | , 'unit'
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29 | , 'for'
|
30 | , '['
|
31 | , ']'
|
32 | , '('
|
33 | , ')'
|
34 | , '+'
|
35 | , '-'
|
36 | , '*'
|
37 | , '<'
|
38 | , '>'
|
39 | , '='
|
40 | , ':'
|
41 | , '&'
|
42 | , '~'
|
43 | ];
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44 |
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45 |
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46 |
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47 |
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48 |
|
49 | var pseudoSelectors = [
|
50 | 'root'
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51 | , 'nth-child'
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52 | , 'nth-last-child'
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53 | , 'nth-of-type'
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54 | , 'nth-last-of-type'
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55 | , 'first-child'
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56 | , 'last-child'
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57 | , 'first-of-type'
|
58 | , 'last-of-type'
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59 | , 'only-child'
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60 | , 'only-of-type'
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61 | , 'empty'
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62 | , 'link'
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63 | , 'visited'
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64 | , 'active'
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65 | , 'hover'
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66 | , 'focus'
|
67 | , 'target'
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68 | , 'lang'
|
69 | , 'enabled'
|
70 | , 'disabled'
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71 | , 'checked'
|
72 | , 'not'
|
73 | ];
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74 |
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75 |
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76 |
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77 |
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78 |
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79 |
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80 |
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81 |
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82 |
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83 | var Parser = module.exports = function Parser(str, options) {
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84 | var self = this;
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85 | options = options || {};
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86 | this.str = nodes.source = str;
|
87 | this.lexer = new Lexer(str, options);
|
88 | this.root = options.root || new nodes.Root;
|
89 | this.state = ['root'];
|
90 | this.state.pop = function(){
|
91 | self.prevState = [].pop.call(this);
|
92 | };
|
93 | };
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94 |
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95 |
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96 |
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97 |
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98 |
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99 | Parser.prototype = {
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100 |
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101 | |
102 |
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103 |
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104 |
|
105 | constructor: Parser,
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106 |
|
107 | /**
|
108 | * Return current state.
|
109 | *
|
110 | * @return {String}
|
111 | * @api private
|
112 | */
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113 |
|
114 | get currentState() {
|
115 | return this.state[this.state.length - 1];
|
116 | },
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117 |
|
118 | |
119 |
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120 |
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121 |
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122 |
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123 |
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124 |
|
125 | parse: function(){
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126 | var block = this.parent = this.root;
|
127 | while ('eos' != this.peek.type) {
|
128 | if (this.accept('newline')) continue;
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129 | var stmt = this.statement;
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130 | this.accept(';');
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131 | if (!stmt) this.error('unexpected token {peek}, not allowed at the root level');
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132 | block.push(stmt);
|
133 | }
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134 | return block;
|
135 | },
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136 |
|
137 | |
138 |
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139 |
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140 |
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141 |
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142 |
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143 |
|
144 | error: function(msg){
|
145 | var type = this.peek.type
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146 | , val = undefined == this.peek.val
|
147 | ? ''
|
148 | : ' ' + this.peek.toString();
|
149 | if (val.trim() == type.trim()) val = '';
|
150 | throw new Error(msg.replace('{peek}', type + val));
|
151 | },
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152 |
|
153 | |
154 |
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155 |
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156 |
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157 |
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158 |
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159 |
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160 |
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161 |
|
162 | accept: function(type){
|
163 | if (type == this.peek.type) {
|
164 | return this.next;
|
165 | }
|
166 | },
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167 |
|
168 | |
169 |
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170 |
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171 |
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172 |
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173 |
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174 |
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175 |
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176 | expect: function(type){
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177 | if (type != this.peek.type) {
|
178 | throw new Error('expected ' + type + ', got ' + this.peek);
|
179 | }
|
180 | return this.next;
|
181 | },
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182 |
|
183 | |
184 |
|
185 |
|
186 |
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187 |
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188 |
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189 |
|
190 | get next() {
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191 | var tok = this.lexer.next;
|
192 | nodes.lineno = tok.lineno;
|
193 | return tok;
|
194 | },
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195 |
|
196 | |
197 |
|
198 |
|
199 |
|
200 |
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201 |
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202 |
|
203 | get peek() {
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204 | return this.lexer.peek;
|
205 | },
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206 |
|
207 | |
208 |
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209 |
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210 |
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211 |
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212 |
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213 |
|
214 |
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215 | lookahead: function(n){
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216 | return this.lexer.lookahead(n);
|
217 | },
|
218 |
|
219 | |
220 |
|
221 |
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222 |
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223 |
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224 |
|
225 |
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226 |
|
227 | isSelectorToken: function(n) {
|
228 | var la = this.lookahead(n).type;
|
229 | switch (la) {
|
230 | case 'for':
|
231 | return this.bracketed;
|
232 | case '[':
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233 | this.bracketed = true;
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234 | return true;
|
235 | case ']':
|
236 | this.bracketed = false;
|
237 | return true;
|
238 | default:
|
239 | return ~selectorTokens.indexOf(la);
|
240 | }
|
241 | },
|
242 |
|
243 | |
244 |
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245 |
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246 |
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247 |
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248 |
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249 |
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250 |
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251 | isPseudoSelector: function(n){
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252 | return ~pseudoSelectors.indexOf(this.lookahead(n).val.name);
|
253 | },
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254 |
|
255 | |
256 |
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257 |
|
258 |
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259 | get selectorToken() {
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260 | if (this.isSelectorToken(1)) return this.next;
|
261 | },
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262 |
|
263 | |
264 |
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265 |
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266 |
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267 | get skipWhitespace() {
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268 | while (~['space', 'indent', 'outdent', 'newline'].indexOf(this.peek.type))
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269 | this.next;
|
270 | },
|
271 |
|
272 | |
273 |
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274 |
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275 |
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276 | get skipSpaces() {
|
277 | while ('space' == this.peek.type)
|
278 | this.next;
|
279 | },
|
280 |
|
281 | |
282 |
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283 |
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284 |
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285 |
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286 |
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287 | looksLikeFunctionDefinition: function(i) {
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288 | return 'indent' == this.lookahead(i).type
|
289 | || '{' == this.lookahead(i).type;
|
290 | },
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291 |
|
292 | |
293 |
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294 |
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295 |
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296 |
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297 | get looksLikeSelector() {
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298 | var i = 1;
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299 |
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300 |
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301 |
|
302 | while ('ident' == this.lookahead(i).type
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303 | && 'newline' == this.lookahead(i + 1).type) i += 2;
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304 |
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305 |
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306 |
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307 |
|
308 | while (this.isSelectorToken(i)) {
|
309 | if (':' == this.lookahead(i++).type
|
310 | && this.isPseudoSelector(i))
|
311 | return true;
|
312 | }
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313 |
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314 |
|
315 | if (',' == this.lookahead(i).type
|
316 | && 'newline' == this.lookahead(i + 1).type)
|
317 | return true;
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318 |
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319 |
|
320 | if ('{' == this.lookahead(i).type
|
321 | && 'newline' == this.lookahead(i + 1).type)
|
322 | return true;
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323 |
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324 |
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325 | if (this.css) {
|
326 | if (';' == this.lookahead(i) ||
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327 | '}' == this.lookahead(i))
|
328 | return false;
|
329 | }
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330 |
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331 |
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332 | while (!~[
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333 | 'newline'
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334 | , 'indent'
|
335 | , 'outdent'
|
336 | , 'for'
|
337 | , 'if'
|
338 | , ';'
|
339 | , '}'].indexOf(this.lookahead(i).type))
|
340 | ++i;
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341 |
|
342 | if ('indent' == this.lookahead(i).type)
|
343 | return true;
|
344 | },
|
345 |
|
346 | |
347 |
|
348 |
|
349 |
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350 |
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351 |
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352 | get statement() {
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353 | var op
|
354 | , stmt = this.stmt
|
355 | , state = this.prevState;
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356 |
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357 |
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358 |
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359 |
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360 |
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361 |
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362 | if (this.allowPostfix) {
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363 | delete this.allowPostfix;
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364 | state = 'expression';
|
365 | }
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366 |
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367 | switch (state) {
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368 | case 'assignment':
|
369 | case 'expression':
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370 | case 'function arguments':
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371 | if (op = this.accept('if') || this.accept('unless')) {
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372 | stmt = new nodes.If(this.expression, stmt);
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373 | stmt.negate = 'unless' == op.type;
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374 | this.accept(';');
|
375 | }
|
376 | }
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377 |
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378 | return stmt;
|
379 | },
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380 |
|
381 | |
382 |
|
383 |
|
384 |
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385 |
|
386 |
|
387 |
|
388 |
|
389 |
|
390 |
|
391 |
|
392 |
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393 |
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394 |
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395 |
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396 |
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397 | get stmt() {
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398 | var type = this.peek.type;
|
399 | switch (type) {
|
400 | case 'selector':
|
401 | case 'literal':
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402 | case 'keyframes':
|
403 | case 'charset':
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404 | case 'import':
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405 | case 'media':
|
406 | case 'page':
|
407 | case 'ident':
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408 | case 'unless':
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409 | case 'function':
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410 | case 'for':
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411 | case 'if':
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412 | return this[type];
|
413 | case 'return':
|
414 | return this.return;
|
415 | case '{':
|
416 | return this.property;
|
417 | default:
|
418 |
|
419 | switch (this.currentState) {
|
420 | case 'root':
|
421 | case 'selector':
|
422 | case 'conditional':
|
423 | case 'keyframe':
|
424 | case 'function':
|
425 | case 'media':
|
426 | case 'for':
|
427 | switch (type) {
|
428 | case 'color':
|
429 | case '~':
|
430 | case '+':
|
431 | case '>':
|
432 | case '<':
|
433 | case '*':
|
434 | case ':':
|
435 | case '&':
|
436 | case '[':
|
437 | return this.selector;
|
438 | }
|
439 | }
|
440 |
|
441 |
|
442 | var expr = this.expression;
|
443 | if (expr.isEmpty) this.error('unexpected {peek}');
|
444 | return expr;
|
445 | }
|
446 | },
|
447 |
|
448 | |
449 |
|
450 |
|
451 |
|
452 | block: function(node, scope) {
|
453 | var delim
|
454 | , stmt
|
455 | , _ = this.css
|
456 | , block = this.parent = new nodes.Block(this.parent, node);
|
457 |
|
458 | if (false === scope) block.scope = false;
|
459 |
|
460 |
|
461 | if (this.css = this.accept('{')) {
|
462 | delim = '}';
|
463 | this.skipWhitespace;
|
464 | } else {
|
465 | delim = 'outdent';
|
466 | this.expect('indent');
|
467 | }
|
468 |
|
469 | while (delim != this.peek.type) {
|
470 |
|
471 | if (this.css) {
|
472 | if (this.accept('newline')) continue;
|
473 | stmt = this.statement;
|
474 | this.accept(';');
|
475 | this.skipWhitespace;
|
476 | } else {
|
477 | if (this.accept('newline')) continue;
|
478 | stmt = this.statement;
|
479 | }
|
480 | if (!stmt) this.error('unexpected token {peek} in block');
|
481 | block.push(stmt);
|
482 | }
|
483 |
|
484 |
|
485 | if (this.css) {
|
486 | this.skipWhitespace;
|
487 | this.expect('}');
|
488 | this.skipSpaces;
|
489 | this.css = _;
|
490 | } else {
|
491 | this.expect('outdent');
|
492 | }
|
493 |
|
494 | this.parent = block.parent;
|
495 | return block;
|
496 | },
|
497 |
|
498 | |
499 |
|
500 |
|
501 |
|
502 | get for() {
|
503 | this.expect('for');
|
504 | var key
|
505 | , val = this.id.name;
|
506 | if (this.accept(',')) key = this.id.name;
|
507 | this.expect('in');
|
508 | var each = new nodes.Each(val, key, this.expression);
|
509 | this.state.push('for');
|
510 | each.block = this.block(each);
|
511 | this.state.pop();
|
512 | return each;
|
513 | },
|
514 |
|
515 | |
516 |
|
517 |
|
518 |
|
519 | get return() {
|
520 | this.expect('return');
|
521 | var expr = this.expression;
|
522 | return expr.isEmpty
|
523 | ? new nodes.Return
|
524 | : new nodes.Return(expr);
|
525 | },
|
526 |
|
527 | |
528 |
|
529 |
|
530 |
|
531 | get unless() {
|
532 | this.expect('unless');
|
533 | var node = new nodes.If(this.expression, true);
|
534 | this.state.push('conditional');
|
535 | node.block = this.block(node, false);
|
536 | this.state.pop();
|
537 | return node;
|
538 | },
|
539 |
|
540 | |
541 |
|
542 |
|
543 |
|
544 | get if() {
|
545 | this.expect('if');
|
546 | var node = new nodes.If(this.expression);
|
547 | this.state.push('conditional');
|
548 | node.block = this.block(node, false);
|
549 | while (this.accept('else')) {
|
550 | if (this.accept('if')) {
|
551 | var cond = this.expression
|
552 | , block = this.block(node, false);
|
553 | node.elses.push(new nodes.If(cond, block));
|
554 | } else {
|
555 | node.elses.push(this.block(node, false));
|
556 | break;
|
557 | }
|
558 | }
|
559 | this.state.pop();
|
560 | return node;
|
561 | },
|
562 |
|
563 | |
564 |
|
565 |
|
566 |
|
567 | get media() {
|
568 | var val = this.expect('media').val
|
569 | , media = new nodes.Media(val);
|
570 | this.state.push('media');
|
571 | media.block = this.block(media);
|
572 | this.state.pop();
|
573 | return media;
|
574 | },
|
575 |
|
576 | |
577 |
|
578 |
|
579 |
|
580 | get import() {
|
581 | this.expect('import');
|
582 | this.allowPostfix = true;
|
583 | return new nodes.Import(this.expect('string').val.val);
|
584 | },
|
585 |
|
586 | |
587 |
|
588 |
|
589 |
|
590 | get charset() {
|
591 | this.expect('charset');
|
592 | var str = this.expect('string').val;
|
593 | this.allowPostfix = true;
|
594 | return new nodes.Charset(str);
|
595 | },
|
596 |
|
597 | |
598 |
|
599 |
|
600 |
|
601 | get page() {
|
602 | var selector;
|
603 | this.expect('page');
|
604 | if (this.accept(':')) {
|
605 | var str = this.expect('ident').val.name;
|
606 | selector = new nodes.Literal(':' + str);
|
607 | }
|
608 | var page = new nodes.Page(selector);
|
609 | this.state.push('page');
|
610 | page.block = this.block(page);
|
611 | this.state.pop();
|
612 | return page;
|
613 | },
|
614 |
|
615 | |
616 |
|
617 |
|
618 |
|
619 | get keyframes() {
|
620 | this.expect('keyframes');
|
621 | var pos
|
622 | , _ = this.css
|
623 | , keyframes = new nodes.Keyframes(this.id);
|
624 |
|
625 |
|
626 | if (this.css = this.accept('{')) {
|
627 | this.skipWhitespace;
|
628 | } else {
|
629 | this.expect('indent');
|
630 | }
|
631 |
|
632 | while (pos = this.accept('unit') || this.accept('ident')) {
|
633 |
|
634 | if ('ident' == pos.type) {
|
635 | this.accept('space');
|
636 | switch (pos.val.name) {
|
637 | case 'from':
|
638 | pos = new nodes.Unit(0, '%');
|
639 | break;
|
640 | case 'to':
|
641 | pos = new nodes.Unit(100, '%');
|
642 | break;
|
643 | default:
|
644 | throw new Error('invalid ident "' + pos.val.name + '" in selector');
|
645 | }
|
646 | } else {
|
647 | pos = pos.val;
|
648 | }
|
649 |
|
650 |
|
651 | this.state.push('keyframe');
|
652 | var block = this.block(keyframes);
|
653 | keyframes.push(pos, block);
|
654 | this.state.pop();
|
655 | if (this.css) this.skipWhitespace;
|
656 | }
|
657 |
|
658 |
|
659 | if (this.css) {
|
660 | this.skipWhitespace;
|
661 | this.expect('}');
|
662 | this.css = _;
|
663 | } else {
|
664 | this.expect('outdent');
|
665 | }
|
666 |
|
667 | return keyframes;
|
668 | },
|
669 |
|
670 | |
671 |
|
672 |
|
673 |
|
674 | get literal() {
|
675 | return this.expect('literal').val;
|
676 | },
|
677 |
|
678 | |
679 |
|
680 |
|
681 |
|
682 | get id() {
|
683 | var tok = this.expect('ident');
|
684 | this.accept('space');
|
685 | return tok.val;
|
686 | },
|
687 |
|
688 | |
689 |
|
690 |
|
691 |
|
692 |
|
693 |
|
694 |
|
695 | get ident() {
|
696 | var i = 2
|
697 | , la = this.lookahead(i).type;
|
698 |
|
699 | while ('space' == la) la = this.lookahead(++i).type;
|
700 |
|
701 | switch (la) {
|
702 |
|
703 | case '=':
|
704 | case '?=':
|
705 | case '-=':
|
706 | case '+=':
|
707 | case '*=':
|
708 | case '/=':
|
709 | case '%=':
|
710 | return this.assignment
|
711 |
|
712 | case '-':
|
713 | case '+':
|
714 | case '/':
|
715 | case '*':
|
716 | case '%':
|
717 | case '**':
|
718 | case 'and':
|
719 | case 'or':
|
720 | case '&&':
|
721 | case '||':
|
722 | case '>':
|
723 | case '<':
|
724 | case '>=':
|
725 | case '<=':
|
726 | case '!=':
|
727 | case '==':
|
728 | case '[':
|
729 | case '?':
|
730 | case 'in':
|
731 | case 'is a':
|
732 | case 'is defined':
|
733 |
|
734 | if (this._ident == this.peek) {
|
735 | return this.id;
|
736 | } else {
|
737 | this._ident = this.peek;
|
738 | switch (this.currentState) {
|
739 |
|
740 | case 'for':
|
741 | case 'selector':
|
742 | return this.property;
|
743 |
|
744 | case 'root':
|
745 | return this.selector;
|
746 |
|
747 | default:
|
748 | return this.operand
|
749 | ? this.id
|
750 | : this.expression;
|
751 | }
|
752 | }
|
753 |
|
754 | default:
|
755 | switch (this.currentState) {
|
756 | case 'root':
|
757 | return this.selector;
|
758 | case 'for':
|
759 | case 'page':
|
760 | case 'media':
|
761 | case 'selector':
|
762 | case 'function':
|
763 | case 'keyframe':
|
764 | case 'conditional':
|
765 | return this.property;
|
766 | default:
|
767 | return this.id;
|
768 | }
|
769 | }
|
770 | },
|
771 |
|
772 | |
773 |
|
774 |
|
775 |
|
776 | get interpolate() {
|
777 | var node
|
778 | , segs = [];
|
779 | while (true) {
|
780 | if (this.accept('{')) {
|
781 | this.state.push('interpolation');
|
782 | segs.push(this.expression);
|
783 | this.expect('}');
|
784 | this.state.pop();
|
785 | } else if (node = this.accept('ident')){
|
786 | segs.push(node.val);
|
787 | } else {
|
788 | break;
|
789 | }
|
790 | }
|
791 | if (!segs.length) this.expect('ident');
|
792 | return segs;
|
793 | },
|
794 |
|
795 | |
796 |
|
797 |
|
798 |
|
799 |
|
800 | get property() {
|
801 | if (this.looksLikeSelector) return this.selector;
|
802 |
|
803 |
|
804 | var ident = this.interpolate
|
805 | , ret = prop = new nodes.Property(ident);
|
806 |
|
807 |
|
808 | this.accept('space');
|
809 | if (this.accept(':')) this.accept('space');
|
810 |
|
811 | this.state.push('property');
|
812 | this.inProperty = true;
|
813 | prop.expr = this.list;
|
814 | if (prop.expr.isEmpty) ret = ident[0];
|
815 | this.inProperty = false;
|
816 | this.allowPostfix = true;
|
817 | this.state.pop();
|
818 |
|
819 |
|
820 | this.accept(';');
|
821 |
|
822 | return ret;
|
823 | },
|
824 |
|
825 | |
826 |
|
827 |
|
828 |
|
829 |
|
830 |
|
831 | get selector() {
|
832 | var tok
|
833 | , arr
|
834 | , val
|
835 | , prev
|
836 | , parent
|
837 | , group = new nodes.Group;
|
838 |
|
839 |
|
840 |
|
841 | this.lexer.allowComments = true;
|
842 |
|
843 | do {
|
844 | val = prev = null;
|
845 | arr = [];
|
846 |
|
847 |
|
848 | this.accept('newline');
|
849 |
|
850 |
|
851 |
|
852 |
|
853 | while (tok = this.selectorToken) {
|
854 |
|
855 | switch (tok.type) {
|
856 | case 'unit': val = tok.val.val; break;
|
857 | case 'ident': val = tok.val.name; break;
|
858 | case 'function': val = tok.val.name + '('; break;
|
859 | case 'string': val = tok.val.toString(); break;
|
860 | case 'color': val = tok.val.raw; break;
|
861 | case 'space': val = ' '; break;
|
862 | default: val = tok.val;
|
863 | }
|
864 |
|
865 |
|
866 | if (!prev || prev.space) {
|
867 | arr.push(val);
|
868 | } else {
|
869 | arr[arr.length-1] += val;
|
870 | }
|
871 | prev = tok;
|
872 | }
|
873 |
|
874 |
|
875 | group.push(new nodes.Selector(arr.join(' '), parent));
|
876 | } while (this.accept(',') || this.accept('newline'));
|
877 |
|
878 | this.lexer.allowComments = false;
|
879 | this.state.push('selector');
|
880 | group.block = this.block(group);
|
881 | this.state.pop();
|
882 |
|
883 |
|
884 | return group;
|
885 | },
|
886 |
|
887 | |
888 |
|
889 |
|
890 |
|
891 | get assignment() {
|
892 | var op
|
893 | , node
|
894 | , name = this.id.name;
|
895 |
|
896 | if (op =
|
897 | this.accept('=')
|
898 | || this.accept('?=')
|
899 | || this.accept('+=')
|
900 | || this.accept('-=')
|
901 | || this.accept('*=')
|
902 | || this.accept('/=')
|
903 | || this.accept('%=')) {
|
904 | this.state.push('assignment');
|
905 | var expr = this.list;
|
906 | if (expr.isEmpty) this.error('invalid right-hand side operand in assignment, got {peek}')
|
907 | node = new nodes.Ident(name, expr);
|
908 | this.state.pop();
|
909 |
|
910 | switch (op.type) {
|
911 | case '?=':
|
912 | var defined = new nodes.BinOp('is defined', node)
|
913 | , lookup = new nodes.Ident(name);
|
914 | node = new nodes.Ternary(defined, lookup, node);
|
915 | break;
|
916 | case '+=':
|
917 | case '-=':
|
918 | case '*=':
|
919 | case '/=':
|
920 | case '%=':
|
921 | node.val = new nodes.BinOp(op.type[0], new nodes.Ident(name), expr);
|
922 | break;
|
923 | }
|
924 | }
|
925 |
|
926 | return node;
|
927 | },
|
928 |
|
929 | |
930 |
|
931 |
|
932 |
|
933 |
|
934 | get function() {
|
935 | var parens = 1
|
936 | , i = 2
|
937 | , tok;
|
938 |
|
939 |
|
940 |
|
941 |
|
942 | out:
|
943 | while (tok = this.lookahead(i++)) {
|
944 | switch (tok.type) {
|
945 | case 'function': case '(': ++parens; break;
|
946 | case ')': if (!--parens) break out;
|
947 | }
|
948 | }
|
949 |
|
950 |
|
951 | switch (this.currentState) {
|
952 | case 'expression':
|
953 | return this.functionCall;
|
954 | default:
|
955 | return this.looksLikeFunctionDefinition(i)
|
956 | ? this.functionDefinition
|
957 | : this.expression;
|
958 | }
|
959 | },
|
960 |
|
961 | |
962 |
|
963 |
|
964 |
|
965 | get functionCall() {
|
966 | var name = this.expect('function').val.name;
|
967 | this.state.push('function arguments');
|
968 | var args = this.args;
|
969 | this.expect(')');
|
970 | this.state.pop();
|
971 | return new nodes.Call(name, args);
|
972 | },
|
973 |
|
974 | |
975 |
|
976 |
|
977 |
|
978 | get functionDefinition() {
|
979 | var name = this.expect('function').val.name;
|
980 |
|
981 |
|
982 | this.state.push('function params');
|
983 | var params = this.params;
|
984 | this.expect(')');
|
985 | this.state.pop();
|
986 |
|
987 |
|
988 | this.state.push('function');
|
989 | var fn = new nodes.Function(name, params);
|
990 | fn.block = this.block(fn);
|
991 | this.state.pop();
|
992 | return new nodes.Ident(name, fn);
|
993 | },
|
994 |
|
995 | |
996 |
|
997 |
|
998 |
|
999 |
|
1000 |
|
1001 |
|
1002 | get params() {
|
1003 | var tok
|
1004 | , node
|
1005 | , params = new nodes.Params;
|
1006 | while (tok = this.accept('ident')) {
|
1007 | this.accept('space');
|
1008 | params.push(node = tok.val);
|
1009 | if (this.accept('...')) {
|
1010 | node.rest = true;
|
1011 | } else if (this.accept('=')) {
|
1012 | node.val = this.expression;
|
1013 | }
|
1014 | this.accept(',');
|
1015 | }
|
1016 | return params;
|
1017 | },
|
1018 |
|
1019 | |
1020 |
|
1021 |
|
1022 |
|
1023 | get args() {
|
1024 | var args = new nodes.Expression;
|
1025 | do {
|
1026 | args.push(this.expression);
|
1027 | } while (this.accept(','));
|
1028 | return args;
|
1029 | },
|
1030 |
|
1031 | |
1032 |
|
1033 |
|
1034 |
|
1035 | get list() {
|
1036 | var node = this.expression;
|
1037 | while (this.accept(',')) {
|
1038 | if (node.isList) {
|
1039 | list.push(this.expression);
|
1040 | } else {
|
1041 | var list = new nodes.Expression(true);
|
1042 | list.push(node);
|
1043 | list.push(this.expression);
|
1044 | node = list;
|
1045 | }
|
1046 | }
|
1047 | return node;
|
1048 | },
|
1049 |
|
1050 | |
1051 |
|
1052 |
|
1053 |
|
1054 | get expression() {
|
1055 | var node
|
1056 | , expr = new nodes.Expression;
|
1057 | this.state.push('expression');
|
1058 | while (node = this.negation) {
|
1059 | if (!node) this.error('unexpected token {peek} in expression');
|
1060 | expr.push(node);
|
1061 | }
|
1062 | this.state.pop();
|
1063 | return expr;
|
1064 | },
|
1065 |
|
1066 | |
1067 |
|
1068 |
|
1069 |
|
1070 |
|
1071 | get negation() {
|
1072 | if (this.accept('not')) {
|
1073 | return new nodes.UnaryOp('!', this.negation);
|
1074 | }
|
1075 | return this.ternary;
|
1076 | },
|
1077 |
|
1078 | |
1079 |
|
1080 |
|
1081 |
|
1082 | get ternary() {
|
1083 | var node = this.logical;
|
1084 | if (this.accept('?')) {
|
1085 | var trueExpr = this.expression;
|
1086 | this.expect(':');
|
1087 | var falseExpr = this.expression;
|
1088 | node = new nodes.Ternary(node, trueExpr, falseExpr);
|
1089 | }
|
1090 | return node;
|
1091 | },
|
1092 |
|
1093 | |
1094 |
|
1095 |
|
1096 |
|
1097 | get logical() {
|
1098 | var op
|
1099 | , node = this.typecheck;
|
1100 | while (op = this.accept('&&') || this.accept('||')) {
|
1101 | node = new nodes.BinOp(op.type, node, this.typecheck);
|
1102 | }
|
1103 | return node;
|
1104 | },
|
1105 |
|
1106 | |
1107 |
|
1108 |
|
1109 |
|
1110 | get typecheck() {
|
1111 | var op
|
1112 | , node = this.equality;
|
1113 | while (op = this.accept('is a')) {
|
1114 | this.operand = true;
|
1115 | if (!node) throw new Error('illegal unary ' + op);
|
1116 | node = new nodes.BinOp(op.type, node, this.equality);
|
1117 | this.operand = false;
|
1118 | }
|
1119 | return node;
|
1120 | },
|
1121 |
|
1122 | |
1123 |
|
1124 |
|
1125 |
|
1126 | get equality() {
|
1127 | var op
|
1128 | , node = this.in;
|
1129 | while (op = this.accept('==') || this.accept('!=')) {
|
1130 | this.operand = true;
|
1131 | if (!node) throw new Error('illegal unary ' + op);
|
1132 | node = new nodes.BinOp(op.type, node, this.in);
|
1133 | this.operand = false;
|
1134 | }
|
1135 | return node;
|
1136 | },
|
1137 |
|
1138 | |
1139 |
|
1140 |
|
1141 |
|
1142 | get in() {
|
1143 | var node = this.relational;
|
1144 | while (this.accept('in')) {
|
1145 | this.operand = true;
|
1146 | if (!node) throw new Error('illegal unary in');
|
1147 | node = new nodes.BinOp('in', node, this.relational);
|
1148 | this.operand = false;
|
1149 | }
|
1150 | return node;
|
1151 | },
|
1152 |
|
1153 | |
1154 |
|
1155 |
|
1156 |
|
1157 | get relational() {
|
1158 | var op
|
1159 | , node = this.range;
|
1160 | while (op =
|
1161 | this.accept('>=')
|
1162 | || this.accept('<=')
|
1163 | || this.accept('<')
|
1164 | || this.accept('>')
|
1165 | ) {
|
1166 | this.operand = true;
|
1167 | if (!node) throw new Error('illegal unary ' + op);
|
1168 | node = new nodes.BinOp(op.type, node, this.range);
|
1169 | this.operand = false;
|
1170 | }
|
1171 | return node;
|
1172 | },
|
1173 |
|
1174 | |
1175 |
|
1176 |
|
1177 |
|
1178 | get range() {
|
1179 | var op
|
1180 | , node = this.additive;
|
1181 | if (op = this.accept('...') || this.accept('..')) {
|
1182 | this.operand = true;
|
1183 | if (!node) throw new Error('illegal unary ' + op);
|
1184 | node = new nodes.BinOp(op.val, node, this.additive);
|
1185 | this.operand = false;
|
1186 | }
|
1187 | return node;
|
1188 | },
|
1189 |
|
1190 | |
1191 |
|
1192 |
|
1193 |
|
1194 | get additive() {
|
1195 | var op
|
1196 | , node = this.multiplicative;
|
1197 | while (op = this.accept('+') || this.accept('-')) {
|
1198 | this.operand = true;
|
1199 | node = new nodes.BinOp(op.type, node, this.multiplicative);
|
1200 | this.operand = false;
|
1201 | }
|
1202 | return node;
|
1203 | },
|
1204 |
|
1205 | |
1206 |
|
1207 |
|
1208 |
|
1209 | get multiplicative() {
|
1210 | var op
|
1211 | , node = this.defined;
|
1212 | while (op =
|
1213 | this.accept('**')
|
1214 | || this.accept('*')
|
1215 | || this.accept('/')
|
1216 | || this.accept('%')) {
|
1217 | this.operand = true;
|
1218 | if ('/' == op && this.inProperty && !this.parens) {
|
1219 | var expr = new nodes.Expression;
|
1220 | expr.push(node);
|
1221 | expr.push(new nodes.Literal('/'));
|
1222 | return expr;
|
1223 | } else {
|
1224 | if (!node) throw new Error('illegal unary ' + op);
|
1225 | node = new nodes.BinOp(op.type, node, this.defined);
|
1226 | this.operand = false;
|
1227 | }
|
1228 | }
|
1229 | return node;
|
1230 | },
|
1231 |
|
1232 | |
1233 |
|
1234 |
|
1235 |
|
1236 |
|
1237 | get defined() {
|
1238 | var node = this.unary;
|
1239 | if (this.accept('is defined')) {
|
1240 | if (!node) throw new Error('illegal use of "is defined"');
|
1241 | node = new nodes.BinOp('is defined', node);
|
1242 | }
|
1243 | return node;
|
1244 | },
|
1245 |
|
1246 | |
1247 |
|
1248 |
|
1249 |
|
1250 |
|
1251 | get unary() {
|
1252 | var op
|
1253 | , node;
|
1254 | if (op =
|
1255 | this.accept('!')
|
1256 | || this.accept('~')
|
1257 | || this.accept('+')
|
1258 | || this.accept('-')) {
|
1259 | this.operand = true;
|
1260 | node = new nodes.UnaryOp(op.type, this.unary);
|
1261 | this.operand = false;
|
1262 | return node;
|
1263 | }
|
1264 | return this.subscript;
|
1265 | },
|
1266 |
|
1267 | |
1268 |
|
1269 |
|
1270 |
|
1271 |
|
1272 | get subscript() {
|
1273 | var node = this.primary;
|
1274 | while (this.accept('[')) {
|
1275 | node = new nodes.BinOp('[]', node, this.expression);
|
1276 | this.expect(']');
|
1277 | }
|
1278 | return node;
|
1279 | },
|
1280 |
|
1281 | |
1282 |
|
1283 |
|
1284 |
|
1285 |
|
1286 |
|
1287 |
|
1288 |
|
1289 |
|
1290 |
|
1291 |
|
1292 | get primary() {
|
1293 | var op
|
1294 | , node;
|
1295 |
|
1296 |
|
1297 | if (this.accept('(')) {
|
1298 | this.parens = true;
|
1299 | var expr = this.expression;
|
1300 | this.expect(')');
|
1301 | this.parens = false;
|
1302 | return expr;
|
1303 | }
|
1304 |
|
1305 |
|
1306 | switch (this.peek.type) {
|
1307 | case 'null':
|
1308 | case 'unit':
|
1309 | case 'color':
|
1310 | case 'string':
|
1311 | case 'literal':
|
1312 | case 'boolean':
|
1313 | return this.next.val;
|
1314 | case 'ident':
|
1315 | return this.ident;
|
1316 | case 'function':
|
1317 | return this.functionCall;
|
1318 | }
|
1319 | }
|
1320 | };
|