net/systemeD/halcyon/styleparser/RuleSet.as

   1 package net.systemeD.halcyon.styleparser {
   2
   3         import flash.events.*;
   4         import flash.net.*;
   5         import net.systemeD.halcyon.ExtendedLoader;
   6         import net.systemeD.halcyon.ExtendedURLLoader;
   7     import net.systemeD.halcyon.connection.Entity;
   8
   9     import net.systemeD.halcyon.connection.*;
  10         import net.systemeD.halcyon.Globals;
  11 //      import bustin.dev.Inspector;
  12
  13         public class RuleSet {
  14
  15                 public var loaded:Boolean=false;                        // has it loaded yet?
  16                 public var images:Object=new Object();          // loaded images
  17                 public var imageWidths:Object=new Object();     // width of each bitmap image
  18                 private var redrawCallback:Function=null;       // function to call when CSS loaded
  19                 private var iconCallback:Function=null;         // function to call when all icons loaded
  20                 private var iconsToLoad:uint=0;                         // number of icons left to load (fire iconCallback when ==0)
  21                 private var evalsToLoad:uint=0;                         // number of evals left to load (fire redrawCallback when ==0)
  22
  23                 private var minscale:uint;
  24                 private var maxscale:uint;
  25                 public var choosers:Array;
  26                 public var evals:Array;
  27
  28                 private static const WHITESPACE:RegExp  =/^ \s+ /sx;
  29                 private static const COMMENT:RegExp             =/^ \/\* .+? \*\/ \s* /sx;      /* */
  30                 private static const CLASS:RegExp               =/^ ([\.:]\w+) \s* /sx;
  31                 private static const NOT_CLASS:RegExp   =/^ !([\.:]\w+) \s* /sx;
  32                 private static const ZOOM:RegExp                =/^ \| \s* z([\d\-]+) \s* /isx;
  33                 private static const GROUP:RegExp               =/^ , \s* /isx;
  34                 private static const CONDITION:RegExp   =/^ \[(.+?)\] \s* /sx;
  35                 private static const OBJECT:RegExp              =/^ (\w+) \s* /sx;
  36                 private static const DECLARATION:RegExp =/^ \{(.+?)\} \s* /sx;
  37                 private static const UNKNOWN:RegExp             =/^ (\S+) \s* /sx;
  38
  39                 private static const ZOOM_MINMAX:RegExp =/^ (\d+)\-(\d+) $/sx;
  40                 private static const ZOOM_MIN:RegExp    =/^ (\d+)\-      $/sx;
  41                 private static const ZOOM_MAX:RegExp    =/^      \-(\d+) $/sx;
  42                 private static const ZOOM_SINGLE:RegExp =/^        (\d+) $/sx;
  43
  44                 private static const CONDITION_TRUE:RegExp      =/^ \s* ([:\w]+) \s* = \s* yes \s*  $/isx;
  45                 private static const CONDITION_FALSE:RegExp     =/^ \s* ([:\w]+) \s* = \s* no  \s*  $/isx;
  46                 private static const CONDITION_SET:RegExp       =/^ \s* ([:\w]+) \s* $/sx;
  47                 private static const CONDITION_UNSET:RegExp     =/^ \s* !([:\w]+) \s* $/sx;
  48                 private static const CONDITION_EQ:RegExp        =/^ \s* ([:\w]+) \s* =  \s* (.+) \s* $/sx;
  49                 private static const CONDITION_NE:RegExp        =/^ \s* ([:\w]+) \s* != \s* (.+) \s* $/sx;
  50                 private static const CONDITION_GT:RegExp        =/^ \s* ([:\w]+) \s* >  \s* (.+) \s* $/sx;
  51                 private static const CONDITION_GE:RegExp        =/^ \s* ([:\w]+) \s* >= \s* (.+) \s* $/sx;
  52                 private static const CONDITION_LT:RegExp        =/^ \s* ([:\w]+) \s* <  \s* (.+) \s* $/sx;
  53                 private static const CONDITION_LE:RegExp        =/^ \s* ([:\w]+) \s* <= \s* (.+) \s* $/sx;
  54                 private static const CONDITION_REGEX:RegExp     =/^ \s* ([:\w]+) \s* =~\/ \s* (.+) \/ \s* $/sx;
  55
  56                 private static const ASSIGNMENT_EVAL:RegExp     =/^ \s* (\S+) \s* \:      \s* eval \s* \( \s* ' (.+?) ' \s* \) \s* $/isx;
  57                 private static const ASSIGNMENT:RegExp          =/^ \s* (\S+) \s* \:      \s*          (.+?) \s*                   $/sx;
  58                 private static const SET_TAG_EVAL:RegExp        =/^ \s* set \s+(\S+)\s* = \s* eval \s* \( \s* ' (.+?) ' \s* \) \s* $/isx;
  59                 private static const SET_TAG:RegExp                     =/^ \s* set \s+(\S+)\s* = \s*          (.+?) \s*                   $/isx;
  60                 private static const SET_TAG_TRUE:RegExp        =/^ \s* set \s+(\S+)\s* $/isx;
  61                 private static const EXIT:RegExp                        =/^ \s* exit \s* $/isx;
  62
  63                 private static const oZOOM:uint=2;
  64                 private static const oGROUP:uint=3;
  65                 private static const oCONDITION:uint=4;
  66                 private static const oOBJECT:uint=5;
  67                 private static const oDECLARATION:uint=6;
  68
  69                 private static const DASH:RegExp=/\-/g;
  70                 private static const COLOR:RegExp=/color$/;
  71                 private static const BOLD:RegExp=/^bold$/i;
  72                 private static const ITALIC:RegExp=/^italic|oblique$/i;
  73                 private static const UNDERLINE:RegExp=/^underline$/i;
  74                 private static const CAPS:RegExp=/^uppercase$/i;
  75                 private static const CENTER:RegExp=/^center$/i;
  76                 private static const FALSE:RegExp=/^(no|false|0)$/i;
  77
  78                 private static const HEX:RegExp=/^#([0-9a-f]+)$/i;
  79                 private static const CSSCOLORS:Object = {
  80                         aliceblue:0xf0f8ff,
  81                         antiquewhite:0xfaebd7,
  82                         aqua:0x00ffff,
  83                         aquamarine:0x7fffd4,
  84                         azure:0xf0ffff,
  85                         beige:0xf5f5dc,
  86                         bisque:0xffe4c4,
  87                         black:0x000000,
  88                         blanchedalmond:0xffebcd,
  89                         blue:0x0000ff,
  90                         blueviolet:0x8a2be2,
  91                         brown:0xa52a2a,
  92                         burlywood:0xdeb887,
  93                         cadetblue:0x5f9ea0,
  94                         chartreuse:0x7fff00,
  95                         chocolate:0xd2691e,
  96                         coral:0xff7f50,
  97                         cornflowerblue:0x6495ed,
  98                         cornsilk:0xfff8dc,
  99                         crimson:0xdc143c,
 100                         cyan:0x00ffff,
 101                         darkblue:0x00008b,
 102                         darkcyan:0x008b8b,
 103                         darkgoldenrod:0xb8860b,
 104                         darkgray:0xa9a9a9,
 105                         darkgreen:0x006400,
 106                         darkkhaki:0xbdb76b,
 107                         darkmagenta:0x8b008b,
 108                         darkolivegreen:0x556b2f,
 109                         darkorange:0xff8c00,
 110                         darkorchid:0x9932cc,
 111                         darkred:0x8b0000,
 112                         darksalmon:0xe9967a,
 113                         darkseagreen:0x8fbc8f,
 114                         darkslateblue:0x483d8b,
 115                         darkslategray:0x2f4f4f,
 116                         darkturquoise:0x00ced1,
 117                         darkviolet:0x9400d3,
 118                         deeppink:0xff1493,
 119                         deepskyblue:0x00bfff,
 120                         dimgray:0x696969,
 121                         dodgerblue:0x1e90ff,
 122                         firebrick:0xb22222,
 123                         floralwhite:0xfffaf0,
 124                         forestgreen:0x228b22,
 125                         fuchsia:0xff00ff,
 126                         gainsboro:0xdcdcdc,
 127                         ghostwhite:0xf8f8ff,
 128                         gold:0xffd700,
 129                         goldenrod:0xdaa520,
 130                         gray:0x808080,
 131                         green:0x008000,
 132                         greenyellow:0xadff2f,
 133                         honeydew:0xf0fff0,
 134                         hotpink:0xff69b4,
 135                         indianred :0xcd5c5c,
 136                         indigo :0x4b0082,
 137                         ivory:0xfffff0,
 138                         khaki:0xf0e68c,
 139                         lavender:0xe6e6fa,
 140                         lavenderblush:0xfff0f5,
 141                         lawngreen:0x7cfc00,
 142                         lemonchiffon:0xfffacd,
 143                         lightblue:0xadd8e6,
 144                         lightcoral:0xf08080,
 145                         lightcyan:0xe0ffff,
 146                         lightgoldenrodyellow:0xfafad2,
 147                         lightgrey:0xd3d3d3,
 148                         lightgreen:0x90ee90,
 149                         lightpink:0xffb6c1,
 150                         lightsalmon:0xffa07a,
 151                         lightseagreen:0x20b2aa,
 152                         lightskyblue:0x87cefa,
 153                         lightslategray:0x778899,
 154                         lightsteelblue:0xb0c4de,
 155                         lightyellow:0xffffe0,
 156                         lime:0x00ff00,
 157                         limegreen:0x32cd32,
 158                         linen:0xfaf0e6,
 159                         magenta:0xff00ff,
 160                         maroon:0x800000,
 161                         mediumaquamarine:0x66cdaa,
 162                         mediumblue:0x0000cd,
 163                         mediumorchid:0xba55d3,
 164                         mediumpurple:0x9370d8,
 165                         mediumseagreen:0x3cb371,
 166                         mediumslateblue:0x7b68ee,
 167                         mediumspringgreen:0x00fa9a,
 168                         mediumturquoise:0x48d1cc,
 169                         mediumvioletred:0xc71585,
 170                         midnightblue:0x191970,
 171                         mintcream:0xf5fffa,
 172                         mistyrose:0xffe4e1,
 173                         moccasin:0xffe4b5,
 174                         navajowhite:0xffdead,
 175                         navy:0x000080,
 176                         oldlace:0xfdf5e6,
 177                         olive:0x808000,
 178                         olivedrab:0x6b8e23,
 179                         orange:0xffa500,
 180                         orangered:0xff4500,
 181                         orchid:0xda70d6,
 182                         palegoldenrod:0xeee8aa,
 183                         palegreen:0x98fb98,
 184                         paleturquoise:0xafeeee,
 185                         palevioletred:0xd87093,
 186                         papayawhip:0xffefd5,
 187                         peachpuff:0xffdab9,
 188                         peru:0xcd853f,
 189                         pink:0xffc0cb,
 190                         plum:0xdda0dd,
 191                         powderblue:0xb0e0e6,
 192                         purple:0x800080,
 193                         red:0xff0000,
 194                         rosybrown:0xbc8f8f,
 195                         royalblue:0x4169e1,
 196                         saddlebrown:0x8b4513,
 197                         salmon:0xfa8072,
 198                         sandybrown:0xf4a460,
 199                         seagreen:0x2e8b57,
 200                         seashell:0xfff5ee,
 201                         sienna:0xa0522d,
 202                         silver:0xc0c0c0,
 203                         skyblue:0x87ceeb,
 204                         slateblue:0x6a5acd,
 205                         slategray:0x708090,
 206                         snow:0xfffafa,
 207                         springgreen:0x00ff7f,
 208                         steelblue:0x4682b4,
 209                         tan:0xd2b48c,
 210                         teal:0x008080,
 211                         thistle:0xd8bfd8,
 212                         tomato:0xff6347,
 213                         turquoise:0x40e0d0,
 214                         violet:0xee82ee,
 215                         wheat:0xf5deb3,
 216                         white:0xffffff,
 217                         whitesmoke:0xf5f5f5,
 218                         yellow:0xffff00,
 219                         yellowgreen:0x9acd32 };
 220
 221                 public function RuleSet(mins:uint,maxs:uint,redrawCall:Function=null,iconLoadedCallback:Function=null):void {
 222                         minscale = mins;
 223                         maxscale = maxs;
 224                         redrawCallback = redrawCall;
 225                         iconCallback = iconLoadedCallback;
 226                 }
 227
 228                 // Get styles for an object
 229
 230                 public function getStyles(obj:Entity, tags:Object, zoom:uint):StyleList {
 231                         var sl:StyleList=new StyleList();
 232                         for each (var sc:StyleChooser in choosers) {
 233                                 sc.updateStyles(obj,tags,sl,imageWidths,zoom);
 234                         }
 235                         return sl;
 236                 }
 237
 238                 // ---------------------------------------------------------------------------------------------------------
 239                 // Loading stylesheet
 240
 241                 public function loadFromCSS(str:String):void {
 242                         if (str.match(/[\s\n\r\t]/)!=null) { parseCSS(str); loaded=true; redrawCallback(); return; }
 243
 244                         var request:URLRequest=new URLRequest(str+"?"+Math.random());
 245                         var loader:URLLoader=new URLLoader();
 246
 247                         request.method=URLRequestMethod.GET;
 248                         loader.dataFormat = URLLoaderDataFormat.TEXT;
 249                         loader.addEventListener(Event.COMPLETE,                                         doParseCSS);
 250                         loader.addEventListener(HTTPStatusEvent.HTTP_STATUS,            httpStatusHandler);
 251                         loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR,      securityErrorHandler);
 252                         loader.addEventListener(IOErrorEvent.IO_ERROR,                          ioErrorHandler);
 253                         loader.load(request);
 254                 }
 255
 256                 private function doParseCSS(e:Event):void {
 257                         parseCSS(e.target.data);
 258                 }
 259
 260                 private function parseCSS(str:String):void {
 261                         parse(str);
 262                         loaded=true;
 263                         if (evals.length==0) { redrawCallback(); }
 264                         loadImages();
 265                 }
 266
 267
 268                 // ------------------------------------------------------------------------------------------------
 269                 // Load all referenced images
 270                 // ** will duplicate if referenced twice, shouldn't
 271
 272                 public function loadImages():void {
 273                         var filename:String;
 274                         for each (var chooser:StyleChooser in choosers) {
 275                                 for each (var style:Style in chooser.styles) {
 276                                         if      (style is PointStyle  && PointStyle(style).icon_image   ) { filename=PointStyle(style).icon_image; }
 277                                         else if (style is ShapeStyle  && ShapeStyle(style).fill_image   ) { filename=ShapeStyle(style).fill_image; }
 278                                         else if (style is ShieldStyle && ShieldStyle(style).shield_image) { filename=ShieldStyle(style).shield_image; }
 279                                         else { continue; }
 280                                         if (filename=='square' || filename=='circle') { continue; }
 281
 282                                         iconsToLoad++;
 283                                         var request:URLRequest=new URLRequest(filename);
 284                                         var loader:ExtendedURLLoader=new ExtendedURLLoader();
 285                                         loader.dataFormat=URLLoaderDataFormat.BINARY;
 286                                         loader.info['filename']=filename;
 287                                         loader.addEventListener(Event.COMPLETE,                                         loadedImage,                    false, 0, true);
 288                                         loader.addEventListener(HTTPStatusEvent.HTTP_STATUS,            httpStatusHandler,              false, 0, true);
 289                                         loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR,      securityErrorHandler,   false, 0, true);
 290                                         loader.addEventListener(IOErrorEvent.IO_ERROR,                          ioErrorHandler,                 false, 0, true);
 291                                         loader.load(request);
 292                                 }
 293                         }
 294                 }
 295
 296                 // data handler
 297
 298                 private function loadedImage(event:Event):void {
 299                         var fn:String=event.target.info['filename'];
 300                         images[fn]=event.target.data;
 301
 302                         var loader:ExtendedLoader = new ExtendedLoader();
 303                         loader.info['filename']=fn;
 304                         loader.contentLoaderInfo.addEventListener(Event.COMPLETE, measureWidth);
 305                         loader.loadBytes(images[fn]);
 306                 }
 307
 308                 private function measureWidth(event:Event):void {
 309                         var fn:String=event.target.loader.info['filename'];
 310                         imageWidths[fn]=event.target.width;
 311                         // ** do we need to explicitly remove the loader object now?
 312
 313                         iconsToLoad--;
 314                         if (iconsToLoad==0 && iconCallback!=null) { iconCallback(); }
 315                 }
 316
 317                 private function httpStatusHandler( event:HTTPStatusEvent ):void { }
 318                 private function securityErrorHandler( event:SecurityErrorEvent ):void { Globals.vars.root.addDebug("securityerrorevent"); }
 319                 private function ioErrorHandler( event:IOErrorEvent ):void { Globals.vars.root.addDebug("ioerrorevent"); }
 320
 321                 // ------------------------------------------------------------------------------------------------
 322                 // Parse CSS
 323
 324                 public function parse(css:String):void {
 325                         var previous:uint=0;                                    // what was the previous CSS word?
 326                         var sc:StyleChooser=new StyleChooser(); // currently being assembled
 327                         choosers=new Array();
 328                         evals=new Array();
 329
 330                         var o:Object=new Object();
 331                         while (css.length>0) {
 332
 333                                 // CSS comment
 334                                 if ((o=COMMENT.exec(css))) {
 335                                         css=css.replace(COMMENT,'');
 336
 337                                 // Whitespace (probably only at beginning of file)
 338                                 } else if ((o=WHITESPACE.exec(css))) {
 339                                         css=css.replace(WHITESPACE,'');
 340
 341                                 // Class - .motorway, .builtup, :hover
 342                                 } else if ((o=CLASS.exec(css))) {
 343                                         if (previous==oDECLARATION) { saveChooser(sc); sc=new StyleChooser(); }
 344
 345                                         css=css.replace(CLASS,'');
 346                                         sc.addCondition(new Condition('set',o[1]));
 347                                         previous=oCONDITION;
 348
 349                                 // Not class - !.motorway, !.builtup, !:hover
 350                                 } else if ((o=NOT_CLASS.exec(css))) {
 351                                         if (previous==oDECLARATION) { saveChooser(sc); sc=new StyleChooser(); }
 352
 353                                         css=css.replace(NOT_CLASS,'');
 354                                         sc.addCondition(new Condition('unset',o[1]));
 355                                         previous=oCONDITION;
 356
 357                                 // Zoom
 358                                 } else if ((o=ZOOM.exec(css))) {
 359                                         if (previous!=oOBJECT && previous!=oCONDITION) { sc.newObject(); }
 360
 361                                         css=css.replace(ZOOM,'');
 362                                         var z:Array=parseZoom(o[1]);
 363                                         sc.addZoom(z[0],z[1]);
 364                                         previous=oZOOM;
 365
 366                                 // Grouping - just a comma
 367                                 } else if ((o=GROUP.exec(css))) {
 368                                         css=css.replace(GROUP,'');
 369                                         sc.newGroup();
 370                                         previous=oGROUP;
 371
 372                                 // Condition - [highway=primary]
 373                                 } else if ((o=CONDITION.exec(css))) {
 374                                         if (previous==oDECLARATION) { saveChooser(sc); sc=new StyleChooser(); }
 375                                         if (previous!=oOBJECT && previous!=oZOOM && previous!=oCONDITION) { sc.newObject(); }
 376                                         css=css.replace(CONDITION,'');
 377                                         sc.addCondition(parseCondition(o[1]) as Condition);
 378                                         previous=oCONDITION;
 379
 380                                 // Object - way, node, relation
 381                                 } else if ((o=OBJECT.exec(css))) {
 382                                         if (previous==oDECLARATION) { saveChooser(sc); sc=new StyleChooser(); }
 383
 384                                         css=css.replace(OBJECT,'');
 385                                         sc.newObject(o[1]);
 386                                         previous=oOBJECT;
 387
 388                                 // Declaration - {...}
 389                                 } else if ((o=DECLARATION.exec(css))) {
 390                                         css=css.replace(DECLARATION,'');
 391                                         sc.addStyles(parseDeclaration(o[1]));
 392                                         previous=oDECLARATION;
 393
 394                                 // Unknown pattern
 395                                 } else if ((o=UNKNOWN.exec(css))) {
 396                                         css=css.replace(UNKNOWN,'');
 397                                         Globals.vars.root.addDebug("unknown: "+o[1]);
 398                                         // ** do some debugging with o[1]
 399
 400                                 } else {
 401                                         Globals.vars.root.addDebug("choked on "+css);
 402                                         return;
 403                                 }
 404                         }
 405                         if (previous==oDECLARATION) { saveChooser(sc); sc=new StyleChooser(); }
 406                 }
 407
 408                 private function saveChooser(sc:StyleChooser):void {
 409                         choosers.push(sc);
 410                 };
 411
 412                 private function saveEval(expr:String):Eval {
 413                         evalsToLoad++;
 414                         var e:Eval=new Eval(expr);
 415                         e.addEventListener("swf_loaded",evalLoaded);
 416                         evals.push(e);
 417                         return e;
 418                 }
 419
 420                 private function evalLoaded(e:Event):void {
 421                         evalsToLoad--;
 422                         if (evalsToLoad==0) { redrawCallback(); }
 423                 }
 424
 425                 // Parse declaration string into list of styles
 426
 427                 private function parseDeclaration(s:String):Array {
 428                         var styles:Array=[];
 429                         var t:Object=new Object();
 430                         var o:Object=new Object();
 431                         var a:String, k:String, v:*;
 432
 433                         // Create styles\10
 434                         var ss:ShapeStyle =new ShapeStyle() ;
 435                         var ps:PointStyle =new PointStyle() ;
 436                         var ts:TextStyle  =new TextStyle()  ;
 437                         var hs:ShieldStyle=new ShieldStyle();
 438                         var xs:InstructionStyle=new InstructionStyle();
 439
 440                         for each (a in s.split(';')) {
 441                                 if ((o=ASSIGNMENT_EVAL.exec(a)))   { t[o[1].replace(DASH,'_')]=saveEval(o[2]); }
 442                                 else if ((o=ASSIGNMENT.exec(a)))   { t[o[1].replace(DASH,'_')]=o[2]; }
 443                                 else if ((o=SET_TAG_EVAL.exec(a))) { xs.addSetTag(o[1],saveEval(o[2])); }
 444                                 else if ((o=SET_TAG.exec(a)))      { xs.addSetTag(o[1],o[2]); }
 445                                 else if ((o=SET_TAG_TRUE.exec(a))) { xs.addSetTag(o[1],true); }
 446                                 else if ((o=EXIT.exec(a))) { xs.setPropertyFromString('breaker',true); }
 447                         }
 448
 449                         // Find sublayer
 450                         var sub:uint=5;
 451                         if (t['z_index']) { sub=Number(t['z_index']); delete t['z_index']; }
 452                         ss.sublayer=ps.sublayer=ts.sublayer=hs.sublayer=sub;
 453                         xs.sublayer=10;
 454
 455                         // Find interactive
 456                         var inter:Boolean=true;
 457                         if (t['interactive']) { inter=t['interactive'].match(FALSE) ? false : true; delete t['interactive']; }
 458                         ss.interactive=ps.interactive=ts.interactive=hs.interactive=xs.interactive=inter;
 459
 460                         // Munge special values
 461                         if (t['font_weight']    ) { t['font_bold'  ]    = t['font_weight'    ].match(BOLD  )    ? true : false; delete t['font_weight']; }
 462                         if (t['font_style']     ) { t['font_italic']    = t['font_style'     ].match(ITALIC)    ? true : false; delete t['font_style']; }
 463                         if (t['text_decoration']) { t['font_underline'] = t['text_decoration'].match(UNDERLINE) ? true : false; delete t['text_decoration']; }
 464                         if (t['text_position']  ) { t['text_center']    = t['text_position'  ].match(CENTER)    ? true : false; delete t['text_position']; }
 465                         if (t['text_transform']) {
 466                                 // ** needs other transformations, e.g. lower-case, sentence-case
 467                                 if (t['text_transform'].match(CAPS)) { t['font_caps']=true; } else { t['font_caps']=false; }
 468                                 delete t['text_transform'];
 469                         }
 470
 471                         // ** Do compound settings (e.g. line: 5px dotted blue;)
 472
 473                         // Assign each property to the appropriate style
 474                         for (a in t) {
 475                                 // Parse properties
 476                                 // ** also do units, e.g. px/pt/m
 477                                 if (a.match(COLOR)) { v = parseCSSColor(t[a]); }
 478                                                else { v = t[a]; }
 479
 480                                 // Set in styles
 481                                 if      (ss.hasOwnProperty(a)) { ss.setPropertyFromString(a,v); }
 482                                 else if (ps.hasOwnProperty(a)) { ps.setPropertyFromString(a,v); }
 483                                 else if (ts.hasOwnProperty(a)) { ts.setPropertyFromString(a,v); }
 484                                 else if (hs.hasOwnProperty(a)) { hs.setPropertyFromString(a,v); }
 485                         }
 486
 487                         // Add each style to list
 488                         if (ss.edited) { styles.push(ss); }
 489                         if (ps.edited) { styles.push(ps); }
 490                         if (ts.edited) { styles.push(ts); }
 491                         if (hs.edited) { styles.push(hs); }
 492                         if (xs.edited) { styles.push(xs); }
 493                         return styles;
 494                 }
 495
 496                 private function parseZoom(s:String):Array {
 497                         var o:Object=new Object();
 498                         if ((o=ZOOM_MINMAX.exec(s))) { return [o[1],o[2]]; }
 499                         else if ((o=ZOOM_MIN.exec(s))) { return [o[1],maxscale]; }
 500                         else if ((o=ZOOM_MAX.exec(s))) { return [minscale,o[1]]; }
 501                         else if ((o=ZOOM_SINGLE.exec(s))) { return [o[1],o[1]]; }
 502                         return null;
 503                 }
 504
 505                 private function parseCondition(s:String):Object {
 506                         var o:Object=new Object();
 507                         if      ((o=CONDITION_TRUE.exec(s)))  { return new Condition('true'     ,o[1]); }
 508                         else if ((o=CONDITION_FALSE.exec(s))) { return new Condition('false',o[1]); }
 509                         else if ((o=CONDITION_SET.exec(s)))   { return new Condition('set'      ,o[1]); }
 510                         else if ((o=CONDITION_UNSET.exec(s))) { return new Condition('unset',o[1]); }
 511                         else if ((o=CONDITION_NE.exec(s)))    { return new Condition('ne'       ,o[1],o[2]); }
 512                         else if ((o=CONDITION_GT.exec(s)))    { return new Condition('>'        ,o[1],o[2]); }
 513                         else if ((o=CONDITION_GE.exec(s)))    { return new Condition('>='       ,o[1],o[2]); }
 514                         else if ((o=CONDITION_LT.exec(s)))    { return new Condition('<'        ,o[1],o[2]); }
 515                         else if ((o=CONDITION_LE.exec(s)))    { return new Condition('<='       ,o[1],o[2]); }
 516                         else if ((o=CONDITION_REGEX.exec(s))) { return new Condition('regex',o[1],o[2]); }
 517                         else if ((o=CONDITION_EQ.exec(s)))    { return new Condition('eq'       ,o[1],o[2]); }
 518                         return null;
 519                 }
 520
 521         public static function parseCSSColor(colorStr:String):uint {
 522             colorStr = colorStr.toLowerCase();
 523             if (CSSCOLORS[colorStr]) {
 524                 return CSSCOLORS[colorStr];
 525             } else {
 526                 var match:Object = HEX.exec(colorStr);
 527                 if ( match ) {
 528                   if ( match[1].length == 3) {
 529                     // repeat digits. #abc => 0xaabbcc
 530                     return Number("0x"+match[1].charAt(0)+match[1].charAt(0)+
 531                                        match[1].charAt(1)+match[1].charAt(1)+
 532                                        match[1].charAt(2)+match[1].charAt(2));
 533                   } else if ( match[1].length == 6) {
 534                     return Number("0x"+match[1]);
 535                   } else {
 536                     return Number("0x000000"); //as good as any
 537                   }
 538                 }
 539             }
 540             return 0;
 541         }
 542         }
 543 }