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() { ...
  75
  76                             if (ts.lookTok(1).data == "=" &&  ts.lookTok(2).name == "FUNCTION") {
  77                                 // freeze time..
  78                                 //println("got = function() ");
  79                                 var cu = ts.cursor;
  80
  81                                 if (ts.balance("(").size < 1 ){
  82                                     ts.dump(cu-40, cu);
  83                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
  84                                     ts.dump(cu, cu+40);
  85
  86                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!" );
  87                                 }
  88                                 //print("AFTER BALANCE (");
  89                                 //ts.dump(cu, ts.cursor);
  90                                 //ts.cursor--; // cursor at the (
  91                                 if (ts.balance("{").size < 1 ){
  92                                     ts.dump(cu-40, cu);
  93                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
  94                                     ts.dump(cu, cu+40);
  95
  96                                     throw new CompressWhiteError.BRACE( "could not find end lbrace!!!");
  97                                 }
  98                                 //print('FN: '+ts.tokens[cu].toString());
  99                                 //print('F1: '+ts.lookTok(1).toString());
 100                                 //print('F2: '+ts.look(1,true).toString());
 101
 102                                 // if next is not ';' -> make it so...
 103                                 // although this var a=function(){},v,c; causes
 104                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name == "NEWLINE") {
 105
 106                                     ts.look(0,true).outData = ts.look(0,true).data+";";
 107                                    // print("ADDING SEMI: " + ts.look(0).toString());
 108                                     //ts.dump(cu, ts.cursor+2);
 109                                 }
 110
 111                                  //ts.dump(cu, ts.cursor+2);
 112                                 // restore..
 113                                 ts.cursor = cu;
 114                                 continue;
 115                             }
 116                             // next item is a name..
 117                             if ((ts.lookTok(1).type == "NAME" || ts.lookTok(1).type == "KEYW" ) &&  ts.look(1,true).name == "NEWLINE") {
 118                                 // preserve linebraek
 119                                 ts.look(0,true).outData = ts.look(0,true).data+"\n";
 120                             }
 121                             // method call followed by name..
 122                             if (ts.lookTok(1).data == "(")  {
 123                                 var cu = ts.cursor;
 124
 125                                 ts.balance("(");
 126                                  // although this var a=function(){},v,c; causes
 127
 128                                 if (ts.lookTok(1).type == "NAME" && ts.look(1,true).name == "NEWLINE") {
 129
 130                                     ts.look(0,true).outData = ts.look(0,true).data+"\n";
 131                                 }
 132                                 // restore..
 133                                 ts.cursor = cu;
 134                                 continue;
 135                             }
 136
 137
 138                             // function a () { ... };
 139                                 /*
 140                             if (ts.look(-1).isTypeN(Script.TOKfunction) &&  ts.look(1).isTypeN(Script.TOKlparen)) {
 141                                 // freeze time..
 142                                 //println("got = function() ");
 143                                 var cu = ts.cursor;
 144
 145                                 ts.balance("lparen");
 146                                 ts.balance("lbrace");
 147                                 // if next is not ';' -> make it so...
 148                                 // although this var a=function(){},v,c; causes
 149                                 if (!ts.look(1).isData(';') && !ts.look(1).isData('}') && ts.look(1,true).isLineBreak()) {
 150                                     ts.cur().outData = ts.cur().data+";";
 151                                 }
 152                                 // restore..
 153                                 ts.cursor = cu;
 154                                 continue;
 155                             }
 156                             */
 157
 158                             // a = { ....
 159
 160                             if (ts.lookTok(1).data == "=" &&  ts.lookTok(2).data == "{") {
 161                                 // freeze time..
 162                                 //println("----------*** 3 *** --------------");
 163                                 var cu = ts.cursor;
 164
 165                                 if (ts.balance("{").size < 1 ){
 166                                     ts.dump(cu-40, cu);
 167                                     print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
 168                                     ts.dump(cu, cu+40);
 169
 170                                     throw new CompressWhiteError.BRACE("could not find end lbrace!!!");
 171                                 }
 172                                 // if next is not ';' -> make it so...
 173
 174                                 if (ts.lookTok(1).data != ";" && ts.lookTok(1).data != "}" && ts.look(1,true).name=="NEWLINE") {
 175                                     ts.look(0,true).outData = ts.look(0,true).data +";";
 176                                 }
 177                                 // restore..
 178                                 ts.cursor = cu;
 179                                 continue;
 180                             }
 181
 182                             // any more??
 183                             // a = function(....) { }
 184
 185                         }
 186
 187
 188
 189
 190                         //println("got Token: " + tok.type);
 191
 192
 193
 194                         switch(tok.data.up()) {
 195                             // things that need space appending
 196                             case "FUNCTION":
 197                             case "BREAK":
 198                             case "CONTINUE":
 199                                 // if next item is a identifier..
 200                                 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!!
 201                                    tok.outData =  tok.data + " ";
 202                                 }
 203                                 continue;
 204
 205
 206                             case "RETURN": // if next item is not a semi; (or }
 207                                 if (ts.lookTok(1).data == ";" || ts.lookTok(1).data == "}") {
 208                                     continue;
 209                                 }
 210                                 tok.outData =  tok.data + " ";
 211
 212                                 continue;
 213
 214
 215                             case "ELSE": // if next item is not a semi; (or }
 216                                 if (ts.lookTok(1).name != "IF") {
 217                                     continue;
 218                                 }
 219                                 // add a space if next element is 'IF'
 220                                 tok.outData =  tok.data + " ";
 221                                 continue;
 222
 223                             case "++": // if previous was a plus or next is a + add a space..
 224                             case "--": // if previous was a - or next is a - add a space..
 225
 226                                 var p = (tok.data == "--" ? "-" : "+");
 227
 228                                 if (ts.lookTok(1).data == p) {
 229                                     tok.outData =  tok.data + " ";
 230                                 }
 231                                 if (ts.lookTok(-1).data == p) {
 232                                     tok.outData =  " " +  tok.data;
 233
 234                                 }
 235                                 continue;
 236
 237                             case "IN": // before and after??
 238                             case "INSTANCEOF":
 239
 240                                 tok.outData = " " + tok.data + " ";
 241                                 continue;
 242
 243                             case "VAR": // always after..
 244                             case "NEW":
 245                             case "DELETE":
 246                             case "THROW":
 247                             case "CASE":
 248                             case "CONST":
 249                             case "VOID":
 250                                 tok.outData =  tok.data + " ";
 251
 252                                 continue;
 253
 254                             case "TYPEOF": // what about typeof(
 255                                 if (ts.lookTok(1).data != "(") {
 256                                     tok.outData =  tok.data + " ";
 257                                 }
 258                                 continue;
 259                              case ";":
 260                                 //remove semicolon before brace --
 261                                 //if(ts.look(1).isTypeN(Script.TOKrbrace)) {
 262                                 //    tok.outData = '';
 263                                // }
 264                                 continue;
 265
 266                             default:
 267                                 continue;
 268                         }
 269                 }
 270
 271                 ts.rewind();
 272
 273                 // NOW OUTPUT THE THING.
 274                 //var f = new File(minfile, File.NEW);
 275
 276                 var outstr = "";
 277                 var outoff = 0;
 278                 //try { out.length = ts.slen; } catch (e) {} // prealloc.
 279
 280
 281                 Token tok;
 282                 while (true) {
 283
 284                         tok = keepWhite ? ts.next() : ts.nextTok();
 285
 286                         if (tok == null) {
 287                             break;
 288                         }
 289                         if (tok.type == "COMM") {
 290                             tok.outData = "\n";
 291                         }
 292
 293                         ///print(tok.type + ':' + tok.data);
 294
 295                         if (tok.type == "NAME"  &&
 296                                  tok.identifier != null  &&
 297                             tok.identifier.mungedValue.length > 0) {
 298                             //f.write(tok.identifier.mungedValue);
 299                             //print("MUNGED: " + tok.identifier.mungedValue);
 300                             outstr += tok.identifier.mungedValue;
 301                             continue;
 302                         }
 303
 304                         // at this point we can apply a text translation kit...
 305                         // NOT SUPPORTED..
 306                         //if ((tok.type == "STRN") && (tok.name== "DOUBLE_QUOTE")) {
 307                         //    if (packer && packer.stringHandler) {
 308                         //        outstr += packer.stringHandler(tok);
 309                         //        continue;
 310                         //    }
 311                         //}
 312
 313                         outstr += tok.outData != "" ? tok.outData : tok.data;
 314
 315                         if ((tok.outData == ";") && (outstr.length - outoff > 255)) {
 316                             outoff = outstr.length;
 317                             outstr += "\n";
 318                         }
 319                 }
 320                 //f.close();
 321                 /*
 322                 // remove the last ';' !!!
 323                 if (out.substring(out.length-1) == ';') {
 324                         return out.substring(0,out.length-1);
 325                    }
 326                 */
 327                 return outstr;
 328
 329         }
 330
 331 }