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