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