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