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