Mercurial Hosting > luan
annotate core/src/luan/impl/ThemeParser.java @ 593:92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Mon, 31 Aug 2015 10:16:57 -0600 |
| parents | fa281ee942c8 |
| children | e91e476186c7 |
| rev | line source |
|---|---|
| 584 | 1 package luan.impl; |
| 2 | |
| 3 import java.util.Map; | |
| 4 import java.util.HashMap; | |
| 5 import java.util.List; | |
| 6 import java.util.ArrayList; | |
| 7 import luan.LuanSource; | |
| 8 import luan.LuanTable; | |
| 9 import luan.LuanElement; | |
| 10 import luan.LuanState; | |
| 11 import luan.LuanFunction; | |
| 12 import luan.LuanException; | |
| 13 import luan.modules.PackageLuan; | |
| 14 | |
| 15 | |
| 16 public final class ThemeParser { | |
| 17 | |
| 18 public static LuanFunction compile(LuanState luan,LuanSource source) throws LuanException { | |
| 19 try { | |
| 20 FnDef fnDef = new ThemeParser(source).parse(); | |
| 21 final LuanStateImpl luanImpl = (LuanStateImpl)luan; | |
| 22 return new Closure(luanImpl,fnDef); | |
| 23 } catch(ParseException e) { | |
| 24 //e.printStackTrace(); | |
| 25 throw new LuanException(luan, e.getFancyMessage() ); | |
| 26 } | |
| 27 } | |
| 28 | |
| 29 private static final class Frame { | |
| 30 final Frame parent; | |
| 31 final List<String> symbols = new ArrayList<String>(); | |
| 32 int stackSize = 0; | |
| 33 final boolean isVarArg; | |
| 34 final List<String> upValueSymbols = new ArrayList<String>(); | |
| 35 final List<UpValue.Getter> upValueGetters = new ArrayList<UpValue.Getter>(); | |
| 36 | |
| 37 Frame() { | |
| 38 this.parent = null; | |
| 39 isVarArg = true; | |
| 40 } | |
| 41 | |
| 42 Frame(Frame parent) { | |
| 43 this.parent = parent; | |
| 44 isVarArg = false; | |
| 45 if( upValueIndex(MOD) != 0 ) | |
| 46 throw new RuntimeException(); | |
| 47 } | |
| 48 | |
| 49 int stackIndex(String name) { | |
| 50 int i = symbols.size(); | |
| 51 while( --i >= 0 ) { | |
| 52 if( symbols.get(i).equals(name) ) | |
| 53 return i; | |
| 54 } | |
| 55 return -1; | |
| 56 } | |
| 57 | |
| 58 int upValueIndex(String name) { | |
| 59 int i = upValueSymbols.size(); | |
| 60 while( --i >= 0 ) { | |
| 61 if( upValueSymbols.get(i).equals(name) ) | |
| 62 return i; | |
| 63 } | |
| 64 if( parent==null ) | |
| 65 return -1; | |
| 66 i = parent.stackIndex(name); | |
| 67 if( i != -1 ) { | |
| 68 upValueGetters.add(new UpValue.StackGetter(i)); | |
| 69 } else { | |
| 70 i = parent.upValueIndex(name); | |
| 71 if( i == -1 ) | |
| 72 return -1; | |
| 73 upValueGetters.add(new UpValue.NestedGetter(i)); | |
| 74 } | |
| 75 upValueSymbols.add(name); | |
| 76 return upValueSymbols.size() - 1; | |
| 77 } | |
| 78 | |
| 79 void addUpValueGetter(String name,UpValue.Getter upValueGetter) { | |
| 80 upValueSymbols.add(name); | |
| 81 upValueGetters.add(upValueGetter); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 private static final String IO = "-IO-"; | |
| 86 private static final String MOD = "-MOD-"; | |
| 87 private static final String ENV = "-ENV-"; | |
| 88 private static final UpValue.Getter[] NO_UP_VALUE_GETTERS = new UpValue.Getter[0]; | |
| 89 | |
| 90 private final LuanSource source; | |
| 91 private final Parser parser; | |
| 92 private Frame frame = new Frame(); | |
| 93 | |
| 94 private ThemeParser(LuanSource source) { | |
| 95 this.source = source; | |
| 96 this.parser = new Parser(this.source); | |
| 97 } | |
| 98 | |
| 99 private LuanElement se(int start) { | |
| 100 return se(start,null); | |
| 101 } | |
| 102 | |
| 103 private LuanElement se(int start,String text) { | |
| 104 return new LuanElement(source,start,parser.currentIndex(),text); | |
| 105 } | |
| 106 | |
| 107 private int symbolsSize() { | |
| 108 return frame.symbols.size(); | |
| 109 } | |
| 110 | |
| 111 private void addSymbol(String name) { | |
| 112 frame.symbols.add(name); | |
| 113 if( frame.stackSize < symbolsSize() ) | |
| 114 frame.stackSize = symbolsSize(); | |
| 115 } | |
| 116 | |
| 117 private FnDef newFnDef(int start,Stmt stmt) { | |
| 118 return new FnDef( se(start), stmt, frame.stackSize, symbolsSize(), frame.isVarArg, frame.upValueGetters.toArray(NO_UP_VALUE_GETTERS) ); | |
| 119 } | |
| 120 | |
| 121 private int stackIndex(String name) { | |
| 122 return frame.stackIndex(name); | |
| 123 } | |
| 124 | |
| 125 private int upValueIndex(String name) { | |
| 126 return frame.upValueIndex(name); | |
| 127 } | |
| 128 | |
| 129 private ParseException exception(String msg) { | |
| 130 parser.failure(); | |
| 131 return parser.exception(msg); | |
| 132 } | |
| 133 | |
| 134 private Expr env() { | |
| 135 return new GetLocalVar(null,stackIndex(ENV)); | |
| 136 } | |
| 137 | |
| 138 private FnDef parse() throws ParseException { | |
| 139 List<Stmt> stmts = new ArrayList<Stmt>(); | |
| 140 int stackStart = symbolsSize(); | |
| 141 { | |
| 142 addSymbol(IO); | |
| 143 LuanElement se = se(0,"require 'luan:Io'"); | |
| 144 FnCall requireCall = new FnCall( se, new ConstExpr(se,PackageLuan.requireFn), new ConstExpr(se,"luan:Io") ); | |
| 145 SetStmt setStmt = new SetStmt( new SetLocalVar(stackIndex(IO)), new ExpressionsExpr(requireCall) ); | |
| 146 stmts.add(setStmt); | |
| 147 } | |
| 148 { | |
| 149 addSymbol(MOD); | |
| 150 LuanElement se = se(0,"local M = {}"); | |
| 151 TableExpr tableExpr = new TableExpr( se, new TableExpr.Field[0], ExpList.emptyExpList ); | |
| 152 SetStmt setStmt = new SetStmt( new SetLocalVar(stackIndex(MOD)), tableExpr ); | |
| 153 stmts.add(setStmt); | |
| 154 } | |
| 155 while( !parser.endOfInput() ) { | |
| 156 Stmt def = parseDef(); | |
| 157 if( def != null ) { | |
| 158 stmts.add(def); | |
| 159 } else { | |
| 160 parser.anyChar(); | |
| 161 } | |
| 162 } | |
| 163 stmts.add( new ReturnStmt(null,new GetLocalVar(null,stackIndex(MOD))) ); | |
| 164 Stmt block = new Block( stmts.toArray(new Stmt[0]), stackStart, symbolsSize() ); | |
| 165 FnDef fnDef = newFnDef(0,block); | |
| 166 return fnDef; | |
| 167 } | |
| 168 | |
| 169 private static class Tag { | |
| 170 final String name; | |
| 171 final Map<String,String> attrs; | |
| 172 | |
| 173 Tag(String name,Map<String,String> attrs) { | |
| 174 this.name = name; | |
| 175 this.attrs = attrs; | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 private Stmt parseDef() throws ParseException { | |
| 180 int start = parser.begin(); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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181 if( !parser.match("{define:") ) |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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182 return parser.failure(null); |
| 584 | 183 Tag tag = parseBlockTag(); |
| 184 if( tag == null ) | |
| 185 return parser.failure(null); | |
| 586 | 186 parser.match('\r'); parser.match('\n'); // ignore newline |
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92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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187 if( !tag.attrs.isEmpty() ) |
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92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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188 throw exception("this block should have no attributes"); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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189 Expr table = new GetLocalVar(null,stackIndex(MOD)); |
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92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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190 Settable fnName = new SetTableEntry(se(start),table,new ConstExpr(null,tag.name)); |
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92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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191 frame = new Frame(frame); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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192 addSymbol(ENV); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
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193 Stmt block = parseBody("define",tag); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
194 FnDef fnDef = newFnDef(start,block); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
195 frame = frame.parent; |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
196 Stmt rtn = new SetStmt(fnName,fnDef); |
| 584 | 197 return parser.success(rtn); |
| 198 } | |
| 199 | |
|
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92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
200 private Stmt parseBody(String type,Tag tag) throws ParseException { |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
201 String endTag = "{/"+type+":" + tag.name + "}"; |
| 584 | 202 List<Stmt> stmts = new ArrayList<Stmt>(); |
| 203 int stackStart = symbolsSize(); | |
| 204 StringBuilder sb = new StringBuilder(); | |
| 205 int start = -1; | |
| 206 while( !parser.match(endTag) ) { | |
| 207 if( parser.endOfInput() ) | |
| 208 throw exception("unclosed block"); | |
| 209 Stmt block = parseBlock(); | |
| 210 if( block != null ) { | |
| 211 addText(start,stmts,sb); | |
| 212 stmts.add(block); | |
| 213 continue; | |
| 214 } | |
| 215 Stmt simpleTag = parseSimpleTag(); | |
| 216 if( simpleTag != null ) { | |
| 217 addText(start,stmts,sb); | |
| 218 stmts.add(simpleTag); | |
| 219 continue; | |
| 220 } | |
| 221 if( sb.length() == 0 ) | |
| 222 start = parser.currentIndex(); | |
| 223 sb.append( parser.currentChar() ); | |
| 224 parser.anyChar(); | |
| 225 } | |
| 226 addText(start,stmts,sb); | |
| 227 Stmt block = new Block( stmts.toArray(new Stmt[0]), 0, symbolsSize() ); | |
| 228 return block; | |
| 229 } | |
| 230 | |
| 231 private void addText(int start,List<Stmt> stmts,StringBuilder sb) { | |
| 232 if( sb.length() == 0 ) | |
| 233 return; | |
| 234 Expr io = new GetUpVar(null,upValueIndex(IO)); | |
| 235 Expr stdoutExp = new IndexExpr( se(start,"stdout"), io, new ConstExpr(null,"stdout") ); | |
| 236 Expr writeExp = new IndexExpr( se(start,"write"), stdoutExp, new ConstExpr(null,"write") ); | |
| 237 FnCall writeCall = new FnCall( se(start), writeExp, new ConstExpr(null,sb.toString()) ); | |
| 238 stmts.add( new ExpressionsStmt(writeCall) ); | |
| 239 sb.setLength(0); | |
| 240 } | |
| 241 | |
| 242 private Stmt parseBlock() throws ParseException { | |
| 243 int start = parser.begin(); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
244 if( !parser.match("{block:") ) |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
245 return parser.failure(null); |
| 584 | 246 Tag tag = parseBlockTag(); |
| 247 if( tag == null ) | |
| 248 return parser.failure(null); | |
| 249 if( tag.name.equals("Set") ) | |
| 250 throw exception("block:Set not allowed here"); | |
| 251 frame = new Frame(frame); | |
| 252 addSymbol(ENV); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
253 Stmt block = parseBody("block",tag); |
| 584 | 254 FnDef fnDef = newFnDef(start,block); |
| 255 frame = frame.parent; | |
| 256 // String rtn = "<% env." + tag.name + "(" + (tag.attrs.isEmpty() ? "nil" : table(tag.attrs)) + ",env,function(env) %>" + block + "<% end) %>"; | |
| 257 Expr env = env(); | |
| 258 Expr fn = new IndexExpr( se(start,"block:"+tag.name), env, new ConstExpr(null,tag.name) ); | |
| 259 List<Expressions> args = new ArrayList<Expressions>(); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
260 args.add( env ); |
| 584 | 261 args.add( tag.attrs.isEmpty() ? new ConstExpr(null,null) : table(tag.attrs) ); |
| 262 args.add( fnDef ); | |
| 263 FnCall fnCall = new FnCall( se(start), fn, ExpList.build(args) ); | |
| 264 Stmt rtn = new ExpressionsStmt(fnCall); | |
| 265 return parser.success(rtn); | |
| 266 } | |
| 267 | |
| 268 private Tag parseBlockTag() throws ParseException { | |
| 269 String name = parseName(); | |
| 270 if( name==null ) | |
| 271 throw exception("invalid block name"); | |
| 272 Map<String,String> attrs = parseAttrs(); | |
| 273 if( !parser.match("}") ) | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
274 return null; |
| 584 | 275 Tag tag = new Tag(name,attrs); |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
276 return tag; |
| 584 | 277 } |
| 278 | |
| 279 private Stmt parseSimpleTag() throws ParseException { | |
| 280 int start = parser.begin(); | |
| 281 if( !parser.match("{") ) | |
| 282 return parser.failure(null); | |
| 283 String name = parseName(); | |
| 284 if( name==null ) | |
| 285 return parser.failure(null); | |
| 286 Map<String,String> attrs = parseAttrs(); | |
| 287 if( !parser.match("}") ) | |
| 288 return parser.failure(null); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
289 // rtn = "<% env." + name + (attrs.isEmpty() ? "()" : table(attrs)) + " %>"; |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
290 Expr env = env(); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
291 Expr fn = new IndexExpr( se(start,name), env, new ConstExpr(null,name) ); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
292 List<Expressions> args = new ArrayList<Expressions>(); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
293 args.add( env ); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
294 if( !attrs.isEmpty() ) |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
295 args.add( table(attrs) ); |
|
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
296 FnCall fnCall = new FnCall( se(start), fn, ExpList.build(args) ); |
| 584 | 297 Stmt rtn = new ExpressionsStmt(fnCall); |
| 298 return parser.success(rtn); | |
| 299 } | |
| 300 | |
| 301 private TableExpr table(Map<String,String> attrs) { | |
| 302 List<TableExpr.Field> fields = new ArrayList<TableExpr.Field>(); | |
| 303 for( Map.Entry<String,String> entry : attrs.entrySet() ) { | |
| 304 ConstExpr key = new ConstExpr(null,entry.getKey()); | |
| 305 ConstExpr value = new ConstExpr(null,entry.getValue()); | |
| 306 fields.add( new TableExpr.Field(key,value) ); | |
| 307 } | |
| 308 return new TableExpr( null, fields.toArray(new TableExpr.Field[0]), ExpList.emptyExpList ); | |
| 309 } | |
| 310 | |
| 311 private Map<String,String> parseAttrs() { | |
| 312 Map<String,String> attrs = new HashMap<String,String>(); | |
| 313 while( parseAttr(attrs) ); | |
| 314 Spaces(); | |
| 315 return attrs; | |
| 316 } | |
| 317 | |
| 318 private boolean parseAttr(Map<String,String> attrs) { | |
| 319 parser.begin(); | |
| 320 Spaces(); | |
| 321 String name = parseName(); | |
| 322 if( name==null ) | |
| 323 return parser.failure(); | |
| 324 Spaces(); | |
| 325 if( !parser.match('=') ) | |
| 326 return parser.failure(); | |
| 327 Spaces(); | |
| 328 if( !parser.match('"') ) | |
| 329 return parser.failure(); | |
| 330 int start = parser.currentIndex(); | |
| 331 while( parser.noneOf("\"}") ); | |
| 332 String val = parser.textFrom(start); | |
| 333 if( !parser.match('"') ) | |
| 334 return parser.failure(); | |
| 335 attrs.put(name,val); | |
| 336 return parser.success(); | |
| 337 } | |
| 338 | |
| 339 private void Spaces() { | |
| 340 while( parser.anyOf(" \t\r\n") ); | |
| 341 } | |
| 342 | |
| 343 private String parseName() { | |
| 344 int start = parser.begin(); | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
345 if( !NameChar() ) |
| 584 | 346 return parser.failure(null); |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
347 while( NameChar() ); |
| 584 | 348 String match = parser.textFrom(start); |
| 349 return parser.success(match); | |
| 350 } | |
| 351 | |
|
593
92c9fa5e39e6
remove theme "Get" and "Set", and add "define"
Franklin Schmidt <fschmidt@gmail.com>
parents:
587
diff
changeset
|
352 private boolean NameChar() { |
| 587 | 353 return parser.inCharRange('a', 'z') || parser.inCharRange('A', 'Z') |
| 354 || parser.inCharRange('0', '9') || parser.anyOf("-_"); | |
| 584 | 355 } |
| 356 | |
| 357 } |