git.roojs.org Git - gnome.introspection-doc-generator/blob - JSDOC/CompressWhite.vala

   1
   2 /**
   3  *
   4  * pack a javascript file, and return a shorter version!
   5  *
   6  * a bit picky at present with ; and crlf reading...
   7  * @arg ts {TokenStream}
   8    @arg packer {Packer}
   9  */
  10 namespace JSDOC
  11 {
  12         public errordomain CompressWhiteError {
  13             BRACE
  14     }
  15
  16         public string CompressWhite (TokenStream ts, Packer packer, bool keepWhite) // throws CompressWhiteError,TokenStreamError
  17         {
  18                 //keepWhite = keepWhite || false;
  19                 ts.rewind();
  20                 //var str = File.read(fn);
  21                 var rep_var = 1;
  22
  23
  24
  25                 while (true) {
  26                         var tok = ts.next();
  27                         if (tok == null) {
  28                             break;
  29                         }
  30                         if (tok.type == "WHIT") {
  31
  32                             continue;
  33                             //if (tok._isDoc) {
  34                             //    continue;
  35                             //}
  36                             // just spaces, not \n!
  37                             //if (tok.data.indexOf("\n") < 0) {
  38                             //    continue;
  39                            // }
  40
  41
  42                         }
  43                         if (tok.data == "}")  {
  44
  45                             if (ts.lookTok(0).type == "NAME" && ts.look(1,true).name == "NEWLINE") {
  46                                 ts.look(0,true).outData = ts.look(0,true).data+"\n";
  47                             }
  48                             // restore..
  49
  50                             continue;
  51                         }
  52                         // add semi-colon's where linebreaks are used... - not foolproof yet.!
  53                         if (tok.type == "NAME")  {
  54                             //var tokident = ts.look(-1).data + tok.data + ts.look(1).data +  ts.look(2).data;
  55                             // a = new function() {}
  56                             if (ts.lookTok(1).data == "=" && ts.lookTok(2).name == "NEW"  &&
  57                                 ts.lookTok(3).name == "FUNCTION") {
  58                                 // freeze time..
  59                                 var cu = ts.cursor;
  60
  61                                 ts.balance("(");
  62
  63
  64                                 ts.balance("{");
  65                                 // if next is not ';' -> make it so...
  66
  67                                 if (ts.lookTok(1).data != ";"  && ts.lookTok(1).data != "}" && ts.lookTok(1).name == "NEWLINE") {
  68                                     ts.look(0,true).outData = ts.lookTok(0).data +";";
  69                                 }
  70                                 // restore..
  71                                 ts.cursor = cu;
  72                                 continue;
  73                             }
  74                             // a = function() { ... -- add a semi colon a tthe end if not one there..
  75
  76                             if (ts.lookTok(1).data == "=" &&  ts.lookTok(2).name == "FUNCTION") {
  77                                 // freeze time..
  78                                 //println("got = function() ");
  79                                 tok = ts.next();
  80                                 tok = ts.next();
  81                                 tok = ts.next();
  82
  83                                 var cu = ts.cursor;
  84                                 ts.cursor+=2; // move two along, and balance...
  85
  86                                 if (tok.data != "(" || ts.balance("(").size < 1 ){
  87
  88                                         print("balance ( issue on line %d\n", ts.toArray().get(cu).line);
  89                                     ts.dump(cu-40, cu+2);
  90                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
  91                                     ts.dump(cu+2, cu+40);
  92
  93                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!" );
  94                                 }
  95                                 tok = ts.lookTok(0);
  96                                 //print("AFTER BALANCE (");
  97                                 //ts.dump(cu, ts.cursor);
  98                                 //ts.cursor--; // cursor at the (
  99                                 if (tok.data != "{" || ts.balance("{").size < 1 ){
 100
 101                                     ts.dump(cu-40, cu);
 102                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
 103                                     ts.dump(cu, cu+40);
 104
 105                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!");
 106                                 }
 107                                 //print('FN: '+ts.tokens[cu].toString());
 108                                 //print('F1: '+ts.lookTok(1).toString());
 109                                 //print('F2: '+ts.look(1,true).toString());
 110
 111                                 // if next is not ';' -> make it so...
 112                                 // although this var a=function(){},v,c; causes
 113                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name == "NEWLINE") {
 114
 115                                     ts.look(0,true).outData = ts.look(0,true).data+";";
 116                                    // print("ADDING SEMI: " + ts.look(0).toString());
 117                                     //ts.dump(cu, ts.cursor+2);
 118                                 }
 119
 120                                  //ts.dump(cu, ts.cursor+2);
 121                                 // restore..
 122                                 ts.cursor = cu;
 123                                 continue;
 124                             }
 125                             // next item is a name..
 126                             if ((ts.lookTok(1).type == "NAME" || ts.lookTok(1).type == "KEYW" ) &&  ts.look(1,true).name == "NEWLINE") {
 127                                 // preserve linebraek
 128                                 ts.look(0,true).outData = ts.look(0,true).data+"\n";
 129                             }
 130                             // method call followed by name..
 131                             if (ts.lookTok(1).data == "(")  {
 132                                 var cu = ts.cursor;
 133
 134                                 ts.balance("(");
 135                                  // although this var a=function(){},v,c; causes
 136
 137                                 if (ts.lookTok(1).type == "NAME" && ts.look(1,true).name == "NEWLINE") {
 138
 139                                     ts.look(0,true).outData = ts.look(0,true).data+"\n";
 140                                 }
 141                                 // restore..
 142                                 ts.cursor = cu;
 143                                 continue;
 144                             }
 145
 146
 147                             // function a () { ... };
 148                                 /*
 149                             if (ts.look(-1).isTypeN(Script.TOKfunction) &&  ts.look(1).isTypeN(Script.TOKlparen)) {
 150                                 // freeze time..
 151                                 //println("got = function() ");
 152                                 var cu = ts.cursor;
 153
 154                                 ts.balance("lparen");
 155                                 ts.balance("lbrace");
 156                                 // if next is not ';' -> make it so...
 157                                 // although this var a=function(){},v,c; causes
 158                                 if (!ts.look(1).isData(';') && !ts.look(1).isData('}') && ts.look(1,true).isLineBreak()) {
 159                                     ts.cur().outData = ts.cur().data+";";
 160                                 }
 161                                 // restore..
 162                                 ts.cursor = cu;
 163                                 continue;
 164                             }
 165                             */
 166
 167                             // a = { ....
 168
 169                             if (ts.lookTok(1).data == "=" &&  ts.lookTok(2).data == "{") {
 170                                 // freeze time..
 171                                 //println("----------*** 3 *** --------------");
 172                                 var cu = ts.cursor;
 173
 174                                 if (ts.balance("{").size < 1 ){
 175
 176                                     ts.dump(cu-40, cu);
 177                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
 178                                     ts.dump(cu, cu+40);
 179
 180                                     throw new CompressWhiteError.BRACE("could not find end lbrace!!!");
 181                                 }
 182                                 // if next is not ';' -> make it so...
 183
 184                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name=="NEWLINE") {
 185                                     ts.look(0,true).outData = ts.look(0,true).data +";";
 186                                 }
 187                                 // restore..
 188                                 ts.cursor = cu;
 189                                 continue;
 190                             }
 191
 192                             // any more??
 193                             // a = function(....) { }
 194
 195                         }
 196
 197
 198
 199
 200                         //println("got Token: " + tok.type);
 201
 202
 203
 204                         switch(tok.data.up()) {
 205                             // things that need space appending
 206                             case "FUNCTION":
 207                             case "BREAK":
 208                             case "CONTINUE":
 209                                 // if next item is a identifier..
 210                                 if (ts.lookTok(1).type == "NAME" || Regex.match_simple("^[a-z]+$", ts.lookTok(1).data, GLib.RegexCompileFlags.CASELESS) ) { // as include is a keyword for us!!
 211                                    tok.outData =  tok.data + " ";
 212                                 }
 213                                 continue;
 214
 215
 216                             case "RETURN": // if next item is not a semi; (or }
 217                                 if (ts.lookTok(1).data == ";" || ts.lookTok(1).data == "}") {
 218                                     continue;
 219                                 }
 220                                 tok.outData =  tok.data + " ";
 221
 222                                 continue;
 223
 224
 225                             case "ELSE": // if next item is not a semi; (or }
 226                                 if (ts.lookTok(1).name != "IF") {
 227                                     continue;
 228                                 }
 229                                 // add a space if next element is 'IF'
 230                                 tok.outData =  tok.data + " ";
 231                                 continue;
 232
 233                             case "++": // if previous was a plus or next is a + add a space..
 234                             case "--": // if previous was a - or next is a - add a space..
 235
 236                                 var p = (tok.data == "--" ? "-" : "+");
 237
 238                                 if (ts.lookTok(1).data == p) {
 239                                     tok.outData =  tok.data + " ";
 240                                 }
 241                                 if (ts.lookTok(-1).data == p) {
 242                                     tok.outData =  " " +  tok.data;
 243
 244                                 }
 245                                 continue;
 246
 247                             case "IN": // before and after??
 248                             case "INSTANCEOF":
 249
 250                                 tok.outData = " " + tok.data + " ";
 251                                 continue;
 252
 253                             case "VAR": // always after..
 254                             case "NEW":
 255                             case "DELETE":
 256                             case "THROW":
 257                             case "CASE":
 258                             case "CONST":
 259                             case "VOID":
 260                                 tok.outData =  tok.data + " ";
 261
 262                                 continue;
 263
 264                             case "TYPEOF": // what about typeof(
 265                                 if (ts.lookTok(1).data != "(") {
 266                                     tok.outData =  tok.data + " ";
 267                                 }
 268                                 continue;
 269                              case ";":
 270                                 //remove semicolon before brace --
 271                                 //if(ts.look(1).isTypeN(Script.TOKrbrace)) {
 272                                 //    tok.outData = '';
 273                                // }
 274                                 continue;
 275
 276                             default:
 277                                 continue;
 278                         }
 279                 }
 280
 281                 ts.rewind();
 282
 283                 // NOW OUTPUT THE THING.
 284                 //var f = new File(minfile, File.NEW);
 285
 286                 var outstr = "";
 287                 var outoff = 0;
 288                 //try { out.length = ts.slen; } catch (e) {} // prealloc.
 289
 290
 291                 Token tok;
 292                 while (true) {
 293
 294                         tok = keepWhite ? ts.next() : ts.nextTok();
 295
 296                         if (tok == null) {
 297                             break;
 298                         }
 299                         if (tok.type == "COMM") {
 300                             tok.outData = "\n";
 301                         }
 302
 303                         ///print(tok.type + ':' + tok.data);
 304
 305                         if (tok.type == "NAME"  &&
 306                                  tok.identifier != null  &&
 307                             tok.identifier.mungedValue.length > 0) {
 308                             //f.write(tok.identifier.mungedValue);
 309                             //print("MUNGED: " + tok.identifier.mungedValue);
 310                             outstr += tok.identifier.mungedValue;
 311                             continue;
 312                         }
 313
 314                         // at this point we can apply a text translation kit...
 315                         // NOT SUPPORTED..
 316                         //if ((tok.type == "STRN") && (tok.name== "DOUBLE_QUOTE")) {
 317                         //    if (packer && packer.stringHandler) {
 318                         //        outstr += packer.stringHandler(tok);
 319                         //        continue;
 320                         //    }
 321                         //}
 322
 323                         outstr += tok.outData != "" ? tok.outData : tok.data;
 324
 325                         if ((tok.outData == ";") && (outstr.length - outoff > 255)) {
 326                             outoff = outstr.length;
 327                             outstr += "\n";
 328                         }
 329                 }
 330                 //f.close();
 331                 /*
 332                 // remove the last ';' !!!
 333                 if (out.substring(out.length-1) == ';') {
 334                         return out.substring(0,out.length-1);
 335                    }
 336                 */
 337                 return outstr;
 338
 339         }
 340
 341 }