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.nextTok();
  80                                 tok = ts.nextTok();
  81
  82                                 //tok = ts.next();
  83                                  var cu = ts.cursor;
  84                                         print("NEXT = should be brac: %s\n", ts.lookTok(1).asString());
  85
  86                                print("cursor = %d", ts.cursor);
  87
  88                                 if (ts.lookTok(1).data != "(" || ts.balance("(").size < 1 ){
  89                                         print("balance ( issue on line %d\n", ts.toArray().get(cu).line);
  90                                     ts.dump(cu-40, cu+2);
  91                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
  92                                     ts.dump(cu+2, cu+40);
  93
  94                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!" );
  95                                 }
  96                                 print("cursor = %d", ts.cursor);
  97                                 print("CUR = should be ): %s\n", ts.lookTok(0).asString());
  98
  99                                 tok = ts.nextTok();
 100                                 print("CUR = should be {: %s\n", ts.lookTok(0).asString());
 101                                 cu = ts.cursor; // set the cursor to here.. so the next bit of the code will check inside the method.
 102                                 print("cursor = %d", ts.cursor);
 103                                 //print("AFTER BALANCE (");
 104                                 //ts.dump(cu, ts.cursor);
 105                                 //ts.cursor--; // cursor at the (
 106                                 if (tok.data != "{" || ts.balance("{").size < 1 ){
 107
 108                                     ts.dump(cu-40, cu);
 109                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
 110                                     ts.dump(cu, cu+40);
 111
 112                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!");
 113                                 }
 114                                 //print('FN: '+ts.tokens[cu].toString());
 115                                 //print('F1: '+ts.lookTok(1).toString());
 116                                 //print('F2: '+ts.look(1,true).toString());
 117
 118                                 // if next is not ';' -> make it so...
 119                                 // although this var a=function(){},v,c; causes
 120                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name == "NEWLINE") {
 121
 122                                     ts.look(0,true).outData = ts.look(0,true).data+";";
 123                                    // print("ADDING SEMI: " + ts.look(0).toString());
 124                                     //ts.dump(cu, ts.cursor+2);
 125                                 }
 126
 127                                  //ts.dump(cu, ts.cursor+2);
 128                                 // restore..
 129                                 ts.cursor = cu;
 130                                 continue;
 131                             }
 132                             // next item is a name..
 133                             if ((ts.lookTok(1).type == "NAME" || ts.lookTok(1).type == "KEYW" ) &&  ts.look(1,true).name == "NEWLINE") {
 134                                 // preserve linebraek
 135                                 ts.look(0,true).outData = ts.look(0,true).data+"\n";
 136                             }
 137                             // method call followed by name..
 138                             if (ts.lookTok(1).data == "(")  {
 139                                 var cu = ts.cursor;
 140
 141                                 ts.balance("(");
 142                                  // although this var a=function(){},v,c; causes
 143
 144                                 if (ts.lookTok(1).type == "NAME" && ts.look(1,true).name == "NEWLINE") {
 145
 146                                     ts.look(0,true).outData = ts.look(0,true).data+"\n";
 147                                 }
 148                                 // restore..
 149                                 ts.cursor = cu;
 150                                 continue;
 151                             }
 152
 153
 154                             // function a () { ... };
 155                                 /*
 156                             if (ts.look(-1).isTypeN(Script.TOKfunction) &&  ts.look(1).isTypeN(Script.TOKlparen)) {
 157                                 // freeze time..
 158                                 //println("got = function() ");
 159                                 var cu = ts.cursor;
 160
 161                                 ts.balance("lparen");
 162                                 ts.balance("lbrace");
 163                                 // if next is not ';' -> make it so...
 164                                 // although this var a=function(){},v,c; causes
 165                                 if (!ts.look(1).isData(';') && !ts.look(1).isData('}') && ts.look(1,true).isLineBreak()) {
 166                                     ts.cur().outData = ts.cur().data+";";
 167                                 }
 168                                 // restore..
 169                                 ts.cursor = cu;
 170                                 continue;
 171                             }
 172                             */
 173
 174                             // a = { ....
 175
 176                             if (ts.lookTok(1).data == "=" &&  ts.lookTok(2).data == "{") {
 177                                 // freeze time..
 178                                 //println("----------*** 3 *** --------------");
 179                                 var cu = ts.cursor;
 180
 181                                 if (ts.balance("{").size < 1 ){
 182
 183                                     ts.dump(cu-40, cu);
 184                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
 185                                     ts.dump(cu, cu+40);
 186
 187                                     throw new CompressWhiteError.BRACE("could not find end lbrace!!!");
 188                                 }
 189                                 // if next is not ';' -> make it so...
 190
 191                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name=="NEWLINE") {
 192                                     ts.look(0,true).outData = ts.look(0,true).data +";";
 193                                 }
 194                                 // restore..
 195                                 ts.cursor = cu;
 196                                 continue;
 197                             }
 198
 199                             // any more??
 200                             // a = function(....) { }
 201
 202                         }
 203
 204
 205
 206
 207                         //println("got Token: " + tok.type);
 208
 209
 210
 211                         switch(tok.data.up()) {
 212                             // things that need space appending
 213                             case "FUNCTION":
 214                             case "BREAK":
 215                             case "CONTINUE":
 216                                 // if next item is a identifier..
 217                                 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!!
 218                                    tok.outData =  tok.data + " ";
 219                                 }
 220                                 continue;
 221
 222
 223                             case "RETURN": // if next item is not a semi; (or }
 224                                 if (ts.lookTok(1).data == ";" || ts.lookTok(1).data == "}") {
 225                                     continue;
 226                                 }
 227                                 tok.outData =  tok.data + " ";
 228
 229                                 continue;
 230
 231
 232                             case "ELSE": // if next item is not a semi; (or }
 233                                 if (ts.lookTok(1).name != "IF") {
 234                                     continue;
 235                                 }
 236                                 // add a space if next element is 'IF'
 237                                 tok.outData =  tok.data + " ";
 238                                 continue;
 239
 240                             case "++": // if previous was a plus or next is a + add a space..
 241                             case "--": // if previous was a - or next is a - add a space..
 242
 243                                 var p = (tok.data == "--" ? "-" : "+");
 244
 245                                 if (ts.lookTok(1).data == p) {
 246                                     tok.outData =  tok.data + " ";
 247                                 }
 248                                 if (ts.lookTok(-1).data == p) {
 249                                     tok.outData =  " " +  tok.data;
 250
 251                                 }
 252                                 continue;
 253
 254                             case "IN": // before and after??
 255                             case "INSTANCEOF":
 256
 257                                 tok.outData = " " + tok.data + " ";
 258                                 continue;
 259
 260                             case "VAR": // always after..
 261                             case "NEW":
 262                             case "DELETE":
 263                             case "THROW":
 264                             case "CASE":
 265                             case "CONST":
 266                             case "VOID":
 267                                 tok.outData =  tok.data + " ";
 268
 269                                 continue;
 270
 271                             case "TYPEOF": // what about typeof(
 272                                 if (ts.lookTok(1).data != "(") {
 273                                     tok.outData =  tok.data + " ";
 274                                 }
 275                                 continue;
 276                              case ";":
 277                                 //remove semicolon before brace --
 278                                 //if(ts.look(1).isTypeN(Script.TOKrbrace)) {
 279                                 //    tok.outData = '';
 280                                // }
 281                                 continue;
 282
 283                             default:
 284                                 continue;
 285                         }
 286                 }
 287
 288                 ts.rewind();
 289
 290                 // NOW OUTPUT THE THING.
 291                 //var f = new File(minfile, File.NEW);
 292
 293                 var outstr = "";
 294                 var outoff = 0;
 295                 //try { out.length = ts.slen; } catch (e) {} // prealloc.
 296
 297
 298                 Token tok;
 299                 while (true) {
 300
 301                         tok = keepWhite ? ts.next() : ts.nextTok();
 302
 303                         if (tok == null) {
 304                             break;
 305                         }
 306                         if (tok.type == "COMM") {
 307                             tok.outData = "\n";
 308                         }
 309
 310                         ///print(tok.type + ':' + tok.data);
 311
 312                         if (tok.type == "NAME"  &&
 313                                  tok.identifier != null  &&
 314                             tok.identifier.mungedValue.length > 0) {
 315                             //f.write(tok.identifier.mungedValue);
 316                             //print("MUNGED: " + tok.identifier.mungedValue);
 317                             outstr += tok.identifier.mungedValue;
 318                             continue;
 319                         }
 320
 321                         // at this point we can apply a text translation kit...
 322                         // NOT SUPPORTED..
 323                         //if ((tok.type == "STRN") && (tok.name== "DOUBLE_QUOTE")) {
 324                         //    if (packer && packer.stringHandler) {
 325                         //        outstr += packer.stringHandler(tok);
 326                         //        continue;
 327                         //    }
 328                         //}
 329
 330                         outstr += tok.outData != "" ? tok.outData : tok.data;
 331
 332                         if ((tok.outData == ";") && (outstr.length - outoff > 255)) {
 333                             outoff = outstr.length;
 334                             outstr += "\n";
 335                         }
 336                 }
 337                 //f.close();
 338                 /*
 339                 // remove the last ';' !!!
 340                 if (out.substring(out.length-1) == ';') {
 341                         return out.substring(0,out.length-1);
 342                    }
 343                 */
 344                 return outstr;
 345
 346         }
 347
 348 }