egra/gui/style.d

   1 /*
   2  * Simple Framebuffer GUI
   3  *
   4  * coded by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
   5  * Understanding is not required. Only obedience.
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, version 3 of the License ONLY.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 module iv.egra.gui.style;
  20
  21 import iv.egra.gfx.base;
  22
  23 import iv.cmdcon;
  24 import iv.dynstring;
  25 import iv.strex;
  26 import iv.xcolornames;
  27
  28 //version = egra_style_dynstr_debug;
  29 //version = egra_style_debug_search;
  30
  31
  32 // ////////////////////////////////////////////////////////////////////////// //
  33 static immutable defaultStyleText = `
  34 // inactive window
  35 SubWindow {
  36   frame: #ddd;
  37   title-back: #ddd;
  38   title-text: black;
  39   shadow-color: rgba(0, 0, 0, 127);
  40   shadow-size: 8;
  41   shadow-dash: 0;
  42   back: rgb(0, 0, 180);
  43
  44   drag-overlay-back: rgba(255, 127, 0, 79);
  45   drag-overlay-dash: 0; /* boolean */
  46
  47   /+
  48   drag-overlay-back: #070;
  49   drag-overlay-dash: 1; // boolean
  50   //shadow-color: rgba(0, 0, 0, 42);
  51   +/
  52
  53   // for widgets
  54   text: gray79;
  55   hotline: gray79;
  56
  57   text-cursor-0: transparent;
  58   text-cursor-1: transparent;
  59   text-cursor-dot: transparent;
  60
  61   text-cursor-blink-time: 800; /* in milliseconds */
  62   text-cursor-dot-time: 100; /* dot crawl time, in milliseconds */
  63 }
  64
  65 SubWindow.minimised {
  66   icon-size-x: 24;
  67   icon-size-y: 24;
  68   icon-margin-x: 4;
  69   icon-margin-y: 4;
  70 }
  71
  72 SubWindow:focused {
  73   frame: white;
  74   title-back: white;
  75
  76   // for widgets
  77   text: white;
  78
  79   text-cursor-0: grey67;
  80   text-cursor-1: white;
  81   text-cursor-dot: transparent;
  82 }
  83
  84
  85 YesNoWindow {
  86   frame: #ddd;
  87   title-back: #ddd;
  88   title-text: black;
  89
  90   back: rgb(0xbf, 0xcf, 0xef);
  91   text: rgb(0x16, 0x2d, 0x59);
  92   hotline: rgb(0x16, 0x2d, 0x59);
  93 }
  94
  95 YesNoWindow:focused {
  96   frame: rgb(0x40, 0x70, 0xcf);
  97   title-back: rgb(0x73, 0x96, 0xdc);
  98   title-text: rgb(0xff, 0xff, 0xff);
  99 }
 100
 101
 102 ProgressBarWidget {
 103   rect: gray20;
 104   back: rgb(17, 17, 0);
 105   text: white;
 106   stripe: rgb(52, 52, 38);
 107
 108   back-hishade: rgb(52, 52, 38);
 109   stripe-hishade: rgb(82, 82, 70);
 110
 111   back-full: rgb(159, 71, 0);
 112   stripe-full: rgb(173, 98, 38);
 113
 114   back-full-hishade: rgb(173, 98, 38);
 115   stripe-full-hishade: rgb(203, 128, 70);
 116 }
 117
 118
 119 ButtonWidget {
 120   back: grey67;
 121   text: black;
 122   hotline: black;
 123 }
 124
 125 ButtonWidget:focused {
 126   back: grey98;
 127   text: #006;
 128   hotline: #006;
 129 }
 130
 131 ButtonWidget:disabled {
 132   back: grey55;
 133   text: grey12;
 134   hotline: transparent;
 135 }
 136
 137
 138 ButtonExWidget {
 139   back: rgb(0x73, 0x96, 0xdc);
 140   text: grey94;
 141   hotline: grey94;
 142   rect: rgb(0x40, 0x70, 0xcf);
 143   shadowline: rgb(0x83, 0xa6, 0xec);
 144 }
 145
 146 ButtonExWidget:focused {
 147   back: rgb(0x93, 0xb6, 0xfc);
 148   text: white;
 149   hotline: white;
 150   shadowline: rgb(0xa3, 0xc6, 0xff);
 151 }
 152
 153
 154 CheckboxWidget {
 155   //text: grey75;
 156   back: transparent;
 157   mark: #0d0;
 158 }
 159
 160 CheckboxWidget:focused {
 161   //text: white;
 162   back: #004;
 163   mark: #0f0;
 164 }
 165
 166 CheckboxWidget:disabled {
 167   text: grey40;
 168   back: transparent;
 169   mark: grey40;
 170 }
 171
 172
 173 SimpleListBoxWidget {
 174   back: #004;
 175   text: #ff0;
 176   cursor-back: #066;
 177   cursor-text: white;
 178 }
 179
 180 SimpleListBoxWidget:focused {
 181   cursor-back: #044;
 182   cursor-text: #ddd;
 183 }
 184
 185
 186 EditorWidget {
 187   back: #007;
 188
 189   status-back: white;
 190   status-color: black;
 191
 192   text: rgb(220, 220, 0);
 193   quote0-text: rgb(128, 128, 0);
 194   quote1-text: rgb(0, 128, 128);
 195   wrap-mark-text: rgb(0, 90, 220);
 196
 197   attach-file-text: rgb(0x6e, 0x00, 0xff);
 198   attach-bad-text: red;
 199
 200   // marked block
 201   mark-back: rgb(0, 160, 160);
 202   mark-text: white;
 203 }
 204
 205
 206 LineEditWidget {
 207   back: black;
 208   text: rgb(220, 220, 0);
 209 }
 210 `;
 211
 212
 213 // ////////////////////////////////////////////////////////////////////////// //
 214 struct EgraCIString {
 215 public:
 216   static uint joaatHashPart (const(void)[] buf, uint hash=0) pure nothrow @trusted @nogc {
 217     pragma(inline, true);
 218     foreach (immutable ubyte b; cast(const(ubyte)[])buf) {
 219       //hash += (uint8_t)locase1251(*s++);
 220       hash += b|0x20; // this converts ASCII capitals to locase (and destroys other, but who cares)
 221       hash += hash<<10;
 222       hash ^= hash>>6;
 223     }
 224     return hash;
 225   }
 226
 227   static uint joaatHashFinish (uint hash) pure nothrow @trusted @nogc {
 228     pragma(inline, true);
 229     // final mix
 230     hash += hash<<3;
 231     hash ^= hash>>11;
 232     hash += hash<<15;
 233     return hash;
 234   }
 235
 236   // ascii only
 237   static bool strEquCI (const(char)[] s0, const(char)[] s1) pure nothrow @trusted @nogc {
 238     if (s0.length != s1.length) return false;
 239     if (s0.ptr == s1.ptr) return true;
 240     foreach (immutable idx, char c0; s0) {
 241       // try the easiest case first
 242       if (c0 == s1.ptr[idx]) continue;
 243       c0 |= 0x20; // convert to ascii lowercase
 244       if (c0 < 'a' || c0 > 'z') return false; // it wasn't a letter, no need to check the second char
 245       // c0 is guaranteed to be a lowercase ascii here
 246       if (c0 != (s1.ptr[idx]|0x20)) return false; // c1 will become a lowercase ascii only if it was uppercase/lowercase ascii
 247     }
 248     return true;
 249   }
 250
 251 private:
 252   uint hashCurr; // current hash
 253   dynstring xstr;
 254
 255 nothrow @trusted @nogc:
 256 public:
 257   alias getData this;
 258
 259 public:
 260   this() (in auto ref dynstring s) { pragma(inline, true); xstr = s; hashCurr = joaatHashPart(xstr.getData); }
 261   this (const(char)[] s) { pragma(inline, true); xstr = s; hashCurr = joaatHashPart(xstr.getData); }
 262   this (in char ch) { pragma(inline, true); xstr = ch; hashCurr = joaatHashPart(xstr.getData); }
 263
 264   ~this () { pragma(inline, true); xstr.clear(); hashCurr = 0; }
 265
 266   void clear () { pragma(inline, true); xstr.clear(); hashCurr = 0; }
 267
 268   @property dynstring str () const { pragma(inline, true); return dynstring(xstr); }
 269   @property void str() (in auto ref dynstring s) { pragma(inline, true); xstr = s; hashCurr = joaatHashPart(xstr.getData); }
 270   @property void str (const(char)[] s) { pragma(inline, true); xstr = s; hashCurr = joaatHashPart(xstr.getData); }
 271
 272   @property uint length () const pure { pragma(inline, true); return xstr.length; }
 273
 274   @property const(char)[] getData () const pure { pragma(inline, true); return xstr.getData; }
 275
 276   void opAssign() (const(char)[] s) { pragma(inline, true); xstr = s; hashCurr = joaatHashPart(xstr.getData); }
 277   void opAssign() (in char ch) { pragma(inline, true); xstr = ch; hashCurr = joaatHashPart(xstr.getData); }
 278   void opAssign() (in auto ref dynstring s) { pragma(inline, true); xstr = s.xstr; hashCurr = joaatHashPart(xstr.getData); }
 279   void opAssign() (in auto ref EgraCIString s) { pragma(inline, true); xstr = s.xstr; hashCurr = s.hashCurr; }
 280
 281   void opOpAssign(string op:"~") (const(char)[] s) { pragma(inline, true); if (s.length) { xstr ~= s; hashCurr = joaatHashPart(xstr.getData); } }
 282   void opOpAssign(string op:"~") (in char ch) { pragma(inline, true); if (s.length) { xstr ~= s; hashCurr = joaatHashPart(xstr.getData); } }
 283   void opOpAssign(string op:"~") (in auto ref dynstring s) { pragma(inline, true); if (s.length) { xstr ~= s; hashCurr = joaatHashPart(xstr.getData); } }
 284   void opOpAssign(string op:"~") (in auto ref EgraCIString s) { pragma(inline, true); if (s.xstr.length) { xstr ~= s.xstr; hashCurr = joaatHashPart(xstr.getData); } }
 285
 286   usize toHash () pure const @safe nothrow @nogc { pragma(inline, true); return joaatHashFinish(hashCurr); }
 287
 288   // case-insensitive
 289   bool opEquals() (const(char)[] other) pure const @safe nothrow @nogc {
 290     pragma(inline, true);
 291     if (xstr.length != other.length) return false;
 292     return strEquCI(xstr.getData, other);
 293   }
 294
 295   // case-insensitive
 296   bool opEquals() (in auto ref EgraCIString other) pure const @safe nothrow @nogc {
 297     pragma(inline, true);
 298     if (hashCurr != other.hashCurr) return false;
 299     if (xstr.length != other.xstr.length) return false;
 300     return strEquCI(xstr.getData, other.xstr.getData);
 301   }
 302
 303   // case-insensitive
 304   bool opEquals() (in auto ref dynstring other) pure const @safe nothrow @nogc {
 305     pragma(inline, true);
 306     if (xstr.length != other.length) return false;
 307     return strEquCI(xstr.getData, other.getData);
 308   }
 309 }
 310
 311
 312 // ////////////////////////////////////////////////////////////////////////// //
 313 struct EgraSimpleParser {
 314 private:
 315   const(char)[] text;
 316   const(char)[] str; // text left
 317
 318 public:
 319   this (const(char)[] atext) nothrow @safe @nogc { pragma(inline, true); setText(atext); }
 320
 321   int getCurrentLine () pure const nothrow @safe @nogc {
 322     int res = 0;
 323     foreach (immutable char ch; text[0..$-str.length]) if (ch == '\n') ++res;
 324     return res;
 325   }
 326
 327   void error (string msg) const {
 328     import std.conv : to;
 329     version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "===\n%.*s\n===\n", cast(uint)str.length, str.ptr); }
 330     throw new Exception("parse error around line "~getCurrentLine.to!string~": "~msg);
 331   }
 332
 333   void setText (const(char)[] atext) nothrow @safe @nogc { pragma(inline, true); text = atext; str = atext; }
 334
 335   bool isEOT () {
 336     skipBlanks();
 337     return (str.length == 0);
 338   }
 339
 340   void skipBlanks () {
 341     while (str.length) {
 342       if (str[0] <= ' ') { str = str.xstripleft; continue; }
 343       if (str.length < 2 || str[0] != '/') break;
 344       // single-line comment?
 345       if (str[1] == '/') {
 346         str = str[2..$];
 347         while (str.length && str[0] != '\n') str = str[1..$];
 348         continue;
 349       }
 350       // multiline comment?
 351       if (str[1] == '*') {
 352         bool endFound = false;
 353         auto svs = str;
 354         str = str[2..$];
 355         while (str.length) {
 356           if (str.length > 1 && str[0] == '*' && str[1] == '/') {
 357             endFound = true;
 358             str = str[2..$];
 359             break;
 360           }
 361           str = str[1..$];
 362         }
 363         if (!endFound) { str = svs; error("unfinished comment"); }
 364         continue;
 365       }
 366       // multiline nested comment?
 367       if (str[1] == '+') {
 368         bool endFound = false;
 369         auto svs = str;
 370         int level = 0;
 371         while (str.length) {
 372           if (str.length > 1) {
 373             if (str[0] == '/' && str[1] == '+') { str = str[2..$]; ++level; continue; }
 374             if (str[0] == '+' && str[1] == '/') { str = str[2..$]; if (--level == 0) { endFound = true; break;} continue; }
 375           }
 376           str = str[1..$];
 377         }
 378         if (!endFound) { str = svs; error("unfinished comment"); }
 379         continue;
 380       }
 381       break;
 382     }
 383   }
 384
 385   bool checkNoEat (const(char)[] tk) {
 386     assert(tk.length);
 387     skipBlanks();
 388     return (str.length >= tk.length && str[0..tk.length] == tk);
 389   }
 390
 391   bool checkDigitNoEat () {
 392     skipBlanks();
 393     return (str.length > 0 && isdigit(str[0]));
 394   }
 395
 396   bool checkNoEat (in char ch) {
 397     skipBlanks();
 398     return (str.length > 0 && str[0] == ch);
 399   }
 400
 401   bool check (const(char)[] tk) {
 402     if (!checkNoEat(tk)) return false;
 403     str = str[tk.length..$];
 404     skipBlanks();
 405     return true;
 406   }
 407
 408   bool check (in char ch) {
 409     if (!checkNoEat(ch)) return false;
 410     str = str[1..$];
 411     skipBlanks();
 412     return true;
 413   }
 414
 415   void expect (const(char)[] tk) {
 416     skipBlanks();
 417     auto svs = str;
 418     if (!check(tk)) { str = svs; error("`"~tk.idup~"` expected"); }
 419   }
 420
 421   void expect (in char ch) {
 422     skipBlanks();
 423     auto svs = str;
 424     if (!check(ch)) { str = svs; error("`"~ch~"` expected"); }
 425   }
 426
 427   const(char)[] expectId () {
 428     skipBlanks();
 429     if (str.length == 0) error("identifier expected");
 430     if (!isalpha(str[0]) && str[0] != '_' && str[0] != '-') error("identifier expected");
 431     usize pos = 1;
 432     while (pos < str.length) {
 433       if (!isalnum(str[pos]) && str[pos] != '_' && str[pos] != '-') break;
 434       ++pos;
 435     }
 436     const(char)[] res = str[0..pos];
 437     str = str[pos..$];
 438     skipBlanks();
 439     return res;
 440   }
 441
 442   const(char)[] expectSelector () {
 443     static bool isSelChar (in char ch) pure nothrow @safe @nogc {
 444       pragma(inline, true);
 445       return (isalnum(ch) || ch == '_' || ch == '-' || ch == '#' || ch == '.' || ch == ':' || ch == '>' || ch == '+');
 446     }
 447     skipBlanks();
 448     if (str.length == 0) error("selector expected");
 449     if (!isSelChar(str[0])) error("selector expected");
 450     usize pos = 1;
 451     while (pos < str.length && isSelChar(str[pos])) ++pos;
 452     const(char)[] res = str[0..pos];
 453     str = str[pos..$];
 454     skipBlanks();
 455     return res;
 456   }
 457
 458   uint parseColor () {
 459     skipBlanks();
 460     if (str.length == 0) error("color expected");
 461
 462     // html-like color?
 463     if (check('#')) return parseHtmlColor();
 464
 465     auto svs = str;
 466     auto id = expectId();
 467
 468     if (id.strEquCI("transparent")) return gxTransparent;
 469
 470     // `rgb()` or `rgba()`?
 471     bool allowAlpha;
 472          if (id.strEquCI("rgba")) allowAlpha = true;
 473     else if (id.strEquCI("rgb")) allowAlpha = false;
 474     else {
 475       auto xc = xFindColorByName(id);
 476       if (xc is null) { str = svs; error("invalid color definition"); }
 477       return gxrgb(xc.r, xc.g, xc.b);
 478     }
 479
 480     skipBlanks();
 481     if (!check('(')) { str = svs; error("invalid color definition"); }
 482     immutable uint clr = parseColorRGB(allowAlpha);
 483     if (!check(')')) { str = svs; error("invalid color definition"); }
 484     return clr;
 485   }
 486
 487   // open quote already eaten
 488   dynstring parseString (in char qch) {
 489     auto epos = str.indexOf('"');
 490     if (epos < 0) error("invalid string");
 491     auto svs = str;
 492     dynstring res;
 493     res.reserve(epos);
 494     usize pos = 0;
 495     while (pos < str.length) {
 496       immutable char ch = str.ptr[pos++];
 497       if (ch == 0) { str = svs; error("invalid string"); }
 498       if (ch == qch) {
 499         str = str[pos..$];
 500         skipBlanks();
 501         return res;
 502       }
 503       if (ch != '\\') {
 504         if (ch == '\n') { str = svs; error("unterminated string"); }
 505         res ~= ch;
 506         continue;
 507       }
 508       if (pos >= str.length) { str = svs; error("unterminated string"); }
 509       switch (str.ptr[pos++]) {
 510         case 't': res ~= '\t'; break;
 511         case 'n': res ~= '\n'; break;
 512         case 'r': res ~= '\r'; break;
 513         case '\n': break;
 514         case '\r': if (pos < str.length && str.ptr[pos] == '\n') ++pos; break;
 515         case '"': case '\'': case '\\': res ~= str.ptr[pos-1]; break;
 516         default: str = svs; error("invalid string escape");
 517       }
 518     }
 519     str = svs;
 520     error("unterminated string");
 521     assert(0);
 522   }
 523
 524   int parseInt () {
 525     skipBlanks();
 526     if (str.length == 0) error("number expected");
 527     auto svs = str;
 528     bool neg = false;
 529          if (check('+')) {}
 530     else if (check('-')) neg = true;
 531     if (str.length == 0 || !isdigit(str[0])) { str = svs; error("number expected"); }
 532     int base = 0;
 533     // check bases
 534     if (str.length > 1 && str[0] == '0') {
 535       switch (str[1]) {
 536         case 'x': case 'X': base = 16; break;
 537         case 'b': case 'B': base = 2; break;
 538         case 'o': case 'O': base = 8; break;
 539         case 'd': case 'D': base = 10; break;
 540         default: break;
 541       }
 542       if (base) {
 543         str = str[2..$];
 544         while (str.length && str[0] == '_') str = str[1..$];
 545       }
 546     }
 547          if (!base) base = 10;
 548     else if (str.length == 0 || digitInBase(str[0], base) < 0) { str = svs; error("number expected"); }
 549     immutable long vmax = (neg ? -cast(long)int.min : cast(long)int.max);
 550     long n = 0;
 551     while (str.length) {
 552       if (str[0] != '_') {
 553         immutable int dg = digitInBase(str[0], base);
 554         if (dg < 0) break;
 555         n = n*base+dg;
 556         if (n > vmax) { str = svs; error("integer overflow"); }
 557       }
 558       str = str[1..$];
 559     }
 560     if (str.length && isalpha(str[0])) { str = svs; error("number expected"); }
 561     skipBlanks();
 562     return cast(int)n;
 563   }
 564
 565 private:
 566   // '#' skipped
 567   uint parseHtmlColor () {
 568     auto svs = str;
 569     skipBlanks();
 570     ubyte[3] rgb = 0;
 571     // first 3 digits
 572     foreach (immutable n; 0..3) {
 573       while (str.length && str[0] == '_') str = str[1..$];
 574       if (str.length == 0) { str = svs; error("invalid color"); }
 575       immutable int dg = digitInBase(str[0], 16);
 576       if (dg < 0) { str = svs; error("invalid color"); }
 577       rgb[n] = cast(ubyte)dg;
 578       str = str[1..$];
 579     }
 580     while (str.length && str[0] == '_') str = str[1..$];
 581     // second 3 digits?
 582     if (str.length && digitInBase(str[0], 16) >= 0) {
 583       foreach (immutable n; 0..3) {
 584         while (str.length && str[0] == '_') str = str[1..$];
 585         if (str.length == 0) { str = svs; error("invalid color"); }
 586         immutable int dg = digitInBase(str[0], 16);
 587         if (dg < 0) { str = svs; error("invalid color"); }
 588         rgb[n] = cast(ubyte)(rgb[n]*16+dg);
 589         str = str[1..$];
 590       }
 591       while (str.length && str[0] == '_') str = str[1..$];
 592     } else {
 593       foreach (immutable n; 0..3) rgb[n] = cast(ubyte)(rgb[n]*16+rgb[n]);
 594     }
 595     skipBlanks();
 596     return gxrgb(rgb[0], rgb[1], rgb[2]);
 597   }
 598
 599   // "(" skipped
 600   uint parseColorRGB (bool allowAlpha) {
 601     auto svs = str;
 602     ubyte[4] rgba = 0;
 603     foreach (immutable n; 0..3+(allowAlpha ? 1 : 0)) {
 604       if (n && !check(',')) { str = svs; error("invalid color"); }
 605       skipBlanks();
 606       if (str.length == 0 || !isdigit(str[0])) { str = svs; error("invalid color"); }
 607       uint val = 0;
 608       uint base = 10;
 609       if (str[0] == '0' && str.length >= 2 && (str[1] == 'x' || str[1] == 'X')) {
 610         str = str[2..$];
 611         if (str.length == 0 || digitInBase(str[0], 16) < 0) { str = svs; error("invalid color"); }
 612         base = 16;
 613       }
 614       while (str.length) {
 615         if (str[0] != '_') {
 616           immutable int dg = digitInBase(str[0], cast(int)base);
 617           if (dg < 0) break;
 618           val = val*base+cast(uint)dg;
 619           if (val > 255) { str = svs; error("invalid color"); }
 620         }
 621         str = str[1..$];
 622       }
 623       while (str.length && str[0] == '_') str = str[1..$];
 624       rgba[n] = cast(ubyte)val;
 625     }
 626     skipBlanks();
 627     if (allowAlpha) return gxrgba(rgba[0], rgba[1], rgba[2], rgba[3]);
 628     return gxrgb(rgba[0], rgba[1], rgba[2]);
 629   }
 630 }
 631
 632
 633 // ////////////////////////////////////////////////////////////////////////// //
 634 /*
 635   style store is a simple list of selectors and properties.
 636   it also holds cache of path:prop, to avoid slow lookups.
 637
 638   style searching is working like this:
 639
 640   loop over all styles from the last one, check if the last path
 641   element of each style is for us, or for one of our superclasses.
 642   if it matches, and distance from us to superclass is lower than
 643   the current one, remember this value. if the distance is zero
 644   (exact match), stop searching, and use found value.
 645
 646   there are some modifiers:
 647     :focused -- for focused widgets
 648     :disabled -- for disabled widgets
 649
 650   if we asked to find something with one of modifiers, and there is
 651   only "unmodified" style available, use the unmodified one. technically
 652   it is implemented by two searches: with, and without a modifier.
 653
 654   special class for subwindows:
 655     .minimised
 656 */
 657 class WidgetStyle {
 658 public:
 659   static struct Value {
 660     enum Type {
 661       Empty,
 662       Str,
 663       Int,
 664       Color,
 665     }
 666     Type type = Type.Empty;
 667     dynstring sval;
 668     union {
 669       uint color;
 670       int ival;
 671     };
 672
 673     this (const(char)[] str) @safe nothrow @nogc { pragma(inline, true); sval = str; type = Type.Str; }
 674     this() (in auto ref dynstring str) @safe nothrow @nogc { pragma(inline, true); sval = str; type = Type.Str; }
 675     this (in int val) @safe nothrow @nogc { pragma(inline, true); ival = val; type = Type.Int; }
 676     this (in uint val) @safe nothrow @nogc { pragma(inline, true); color = val; type = Type.Color; }
 677     this() (in auto ref Value v) @safe nothrow @nogc { pragma(inline, true); type = v.type; sval = v.sval; color = v.color; }
 678
 679     ~this () nothrow @safe @nogc { pragma(inline, true); sval.clear(); color = 0; type = Type.Empty; }
 680     void clear () nothrow @safe @nogc { pragma(inline, true); sval.clear(); color = 0; type = Type.Empty; }
 681
 682     @property bool isEmpty () pure const @safe nothrow { pragma(inline, true); return (type == Type.Empty); }
 683     @property bool isString () pure const @safe nothrow { pragma(inline, true); return (type == Type.Str); }
 684     @property bool isColor () pure const @safe nothrow { pragma(inline, true); return (type == Type.Color); }
 685     @property bool isInteger () pure const @safe nothrow { pragma(inline, true); return (type == Type.Int); }
 686
 687     static Value Empty () @safe nothrow @nogc { pragma(inline, true); return Value(); }
 688     static Value String (const(char)[] str) @safe nothrow @nogc { pragma(inline, true); return Value(str); }
 689     static Value String() (in auto ref dynstring str) @safe nothrow @nogc { pragma(inline, true); return Value(str); }
 690     static Value Color (in uint clr) @safe nothrow @nogc { pragma(inline, true); return Value(clr); }
 691     static Value Integer (in int val) @safe nothrow @nogc { pragma(inline, true); return Value(val); }
 692
 693     void opAssign() (in auto ref Value v) { pragma(inline, true); type = v.type; sval = v.sval; color = v.color; }
 694   }
 695
 696   static struct Item {
 697     dynstring sel; // selector
 698     EgraCIString prop; // property name
 699     Value value; // property value
 700
 701     this() (in auto ref Item it) @trusted nothrow @nogc {
 702       pragma(inline, true);
 703       sel = it.sel; prop = it.prop; value = it.value;
 704       version(egra_style_dynstr_debug) {
 705         import core.stdc.stdio : stderr, fprintf;
 706         fprintf(stderr, "Item:0x%08x: constructed from 0x%08x! sel=[%.*s]; prop=[%.*s]\n",
 707           cast(uint)cast(void*)&this, cast(uint)cast(void*)&it,
 708           cast(uint)sel.length, sel.getData.ptr,
 709           cast(uint)prop.length, prop.getData.ptr);
 710       }
 711     }
 712
 713     version(egra_style_dynstr_debug) {
 714       this (this) nothrow @trusted @nogc {
 715         import core.stdc.stdio : stderr, fprintf;
 716         fprintf(stderr, "Item:0x%08x: copied! sel=[%.*s]; prop=[%.*s]\n", cast(uint)cast(void*)&this,
 717           cast(uint)sel.length, sel.getData.ptr,
 718           cast(uint)prop.length, prop.getData.ptr);
 719       }
 720     }
 721
 722      ~this () nothrow @trusted @nogc {
 723       pragma(inline, true);
 724       version(egra_style_dynstr_debug) {
 725         import core.stdc.stdio : stderr, fprintf;
 726         fprintf(stderr, "Item:0x%08x: DESTROYING! sel=[%.*s]; prop=[%.*s]\n", cast(uint)cast(void*)&this,
 727           cast(uint)sel.length, sel.getData.ptr,
 728           cast(uint)prop.length, prop.getData.ptr);
 729       }
 730       sel.clear();
 731       prop.clear();
 732       value.clear();
 733     }
 734
 735     void clear () nothrow @safe @nogc { pragma(inline, true); sel.clear(); prop.clear(); value.clear(); }
 736
 737     void opAssign() (in auto ref Item it) nothrow @trusted @nofc { pragma(inline, true); sel = it.sel; prop = it.prop; value = it.value; }
 738   }
 739
 740 protected:
 741   Item[] style;
 742
 743   // "path" here is the path to a styled class, not a selector
 744   // modifier is appended to the path
 745   // prop name is appended last
 746   Value[EgraCIString] styleCache;
 747
 748 protected:
 749   final void clearStyleCache () @trusted nothrow {
 750     pragma(inline, true);
 751     if (styleCache.length) {
 752       foreach (ref kv; styleCache.byKeyValue) { kv.key.clear(); kv.value.clear(); }
 753       styleCache.clear();
 754       //styleCache = null;
 755     }
 756   }
 757
 758   final const(Value)* findCachedValue (EgraStyledClass obj, const(char)[] prop) @trusted nothrow {
 759     pragma(inline, true);
 760     if (obj is null) {
 761       return null;
 762     } else {
 763       EgraCIString pp = obj.getFullPath();
 764       auto mod = obj.getCurrentMod();
 765       if (mod.length) { pp ~= "\x00"; pp ~= mod; }
 766       if (prop.length) { pp ~= "\x00"; pp ~= prop; }
 767       return (pp in styleCache);
 768     }
 769   }
 770
 771   final void cacheValue (in ref Value val, EgraStyledClass obj, const(char)[] prop) @trusted nothrow {
 772     pragma(inline, true);
 773     if (obj is null) return;
 774     EgraCIString pp = obj.getFullPath();
 775     auto mod = obj.getCurrentMod();
 776     if (mod.length) { pp ~= "\x00"; pp ~= mod; }
 777     if (prop.length) { pp ~= "\x00"; pp ~= prop; }
 778     styleCache[pp] = Value(val);
 779   }
 780
 781 protected:
 782   final void addColorItem() (in auto ref Item ci) @trusted nothrow {
 783     if (ci.sel.length && ci.sel.length) {
 784       clearStyleCache();
 785       version(egra_style_dynstr_debug) {
 786         import core.stdc.stdio : stderr, fprintf;
 787         fprintf(stderr, "addColorItem:000: style.length=%u; style.capacity=%u; stype.ptr=0x%08x\n",
 788           cast(uint)style.length, cast(uint)style.capacity, cast(uint)style.ptr);
 789         conwriteln("ADDING: ci.sel:", ci.sel.getData, "; ci.prop:", ci.prop.getData);
 790       }
 791       style ~= Item(ci);
 792       version(egra_style_dynstr_debug) {
 793         import core.stdc.stdio : stderr, fprintf;
 794         fprintf(stderr, "addColorItem:001: style.length=%u; style.capacity=%u; stype.ptr=0x%08x\n",
 795           cast(uint)style.length, cast(uint)style.capacity, cast(uint)style.ptr);
 796         conwriteln("ADDED(", style.length, "): ci.sel:", style[$-1].sel.getData, "; ci.prop:", style[$-1].prop.getData);
 797       }
 798     }
 799   }
 800
 801 public:
 802   void parseStyle (const(char)[] str) {
 803     auto par = EgraSimpleParser(str);
 804     while (!par.isEOT) {
 805       if (par.check('!')) {
 806         auto cmd = par.expectId();
 807         if (cmd.strEquCI("clear-style")) {
 808           clear();
 809         } else {
 810           par.error("invalid command: '"~cmd.idup~"'");
 811         }
 812         par.expect(';');
 813         continue;
 814       }
 815       auto sel = par.expectSelector();
 816       par.expect("{");
 817       while (!par.check("}")) {
 818         auto prop = par.expectId();
 819         par.expect(":");
 820         Item ci;
 821         ci.sel = sel;
 822         ci.prop = prop;
 823         if (par.check('"')) {
 824           // string
 825           ci.value = Value.String(par.parseString('"'));
 826         } else if (par.check('\'')) {
 827           // string
 828           ci.value = Value.String(par.parseString('\''));
 829         } else if (par.checkDigitNoEat() || par.checkNoEat('+') || par.checkNoEat('-')) {
 830           // number
 831           ci.value = Value.Integer(par.parseInt());
 832         } else {
 833           // color
 834           ci.value = Value.Color(par.parseColor());
 835         }
 836         par.expect(';');
 837         addColorItem(ci);
 838       }
 839     }
 840
 841     version(none) {
 842       conwriteln("items: ", style.length);
 843       conwriteln("0:ADDED: ci.sel:", style[0].sel.getData, "; ci.prop:", style[0].prop.getData);
 844       conwriteln("$-1:ADDED: ci.sel:", style[$-1].sel.getData, "; ci.prop:", style[$-1].prop.getData);
 845       foreach (const ref Item it; style; reversed) {
 846         conwriteln("*** it.sel:", it.sel.getData, "; it.prop:", it.prop.getData);
 847       }
 848     }
 849   }
 850
 851 public:
 852   this () {}
 853
 854   void cloneFrom (WidgetStyle st) {
 855     if (st is null || st is this) return;
 856     //Item[] style;
 857     clearStyleCache();
 858     style.length -= style.length;
 859     style.reserve(st.style.length);
 860     foreach (const ref Item it; st.style) addColorItem(it);
 861   }
 862
 863   void clear () {
 864     clearStyleCache();
 865     style.length -= style.length;
 866   }
 867
 868   protected static struct BaseInfo {
 869     TypeInfo_Class defaultParent = void;
 870     TypeInfo_Class ctsrc = void;
 871   }
 872
 873   protected const(Value)* findValueIntr (EgraStyledClass obj, const(char)[] prop) @trusted nothrow {
 874     if (obj is null || style.length == 0 || prop.length == 0) return null;
 875
 876     version(egra_style_debug_search) conwriteln("*** SEARCHING:", typeid(obj).name, "; mod=", obj.getCurrentMod(), "; prop:", prop, "****");
 877     TypeInfo_Class cioverride = typeid(obj);
 878     const(Value)* resval = null;
 879     while (cioverride !is null) {
 880       const(Value)* resmod = null;
 881       const(Value)* resnomod = null;
 882       foreach (const ref Item it; style; reversed) {
 883         if (it.prop != prop) continue;
 884         version(egra_style_debug_search) conwriteln("  OBJ:", typeid(obj).name, "; ci:", classShortName(cioverride), "; prop:", prop, "; it.sel:", it.sel.getData, "; it.prop:", it.prop.getData);
 885         bool modhit, modseen;
 886         if (obj.isMySelector(it.sel, classShortName(cioverride), &modhit, &modseen, asQuery:false)) {
 887           if (modseen) {
 888             // last selector had mod
 889             if (!modhit || obj.getCurrentMod().length == 0) continue; // object has no mod, cannot apply
 890           } else {
 891             // last selector had no mod
 892             //if (modhit && obj.getCurrentMod().length != 0) modhit = false;
 893           }
 894           debug conwriteln("   FOUND! modseen=", modseen, "; modhit=", modhit, "; objmod=", obj.getCurrentMod, "; sel=", it.sel);
 895           if (modhit) { resmod = &it.value; break; }
 896           else if (resnomod is null) resnomod = &it.value;
 897         }
 898       }
 899       if (resmod !is null) {
 900         version(egra_style_debug_search) conwriteln("    FOUND MOD!");
 901         resval = resmod;
 902         break;
 903       }
 904       if (resnomod !is null) {
 905         version(egra_style_debug_search) conwriteln("    FOUND NOMOD!");
 906         resval = resnomod;
 907         break;
 908       }
 909       cioverride = cioverride.base;
 910       if (cioverride is typeid(EgraStyledClass)) {
 911         EgraStyledClass tl = obj.getTopLevel();
 912         if (tl is null || tl is obj) break;
 913         obj = tl;
 914         cioverride = typeid(obj);
 915       }
 916     }
 917
 918     return resval;
 919   }
 920
 921   final const(Value)* findValue (EgraStyledClass obj, const(char)[] prop) @trusted nothrow {
 922     if (obj is null || style.length == 0 || prop.length == 0) return null;
 923
 924     if (auto fv = findCachedValue(obj, prop)) return (fv.isEmpty ? null : fv);
 925
 926     if (auto fv = findValueIntr(obj, prop)) {
 927       cacheValue(*fv, obj, prop);
 928       return fv;
 929     }
 930
 931     Value val = Value.Empty();
 932     cacheValue(val, obj, prop);
 933     return null;
 934   }
 935
 936   final uint findColor (EgraStyledClass obj, const(char)[] prop, bool* foundp=null) @trusted nothrow {
 937     if (auto val = findValue(obj, prop)) {
 938       if (val.isColor) {
 939         if (foundp) *foundp = true;
 940         return val.color;
 941       }
 942     }
 943
 944     if (foundp) *foundp = false;
 945     return gxUnknown;
 946   }
 947
 948   // returns `null` if not found
 949   final dynstring findString (EgraStyledClass obj, const(char)[] prop, bool* foundp=null) @trusted nothrow {
 950     if (auto val = findValue(obj, prop)) {
 951       if (val.isString) {
 952         if (foundp) *foundp = true;
 953         return val.sval;
 954       }
 955     }
 956
 957     if (foundp) *foundp = false;
 958     return dynstring();
 959   }
 960
 961   // returns 0 if not found
 962   final int findInt (EgraStyledClass obj, const(char)[] prop, in int defval=0, bool* foundp=null) @trusted nothrow {
 963     if (auto val = findValue(obj, prop)) {
 964       if (val.isInteger) {
 965         if (foundp) *foundp = true;
 966         return val.ival;
 967       }
 968     }
 969
 970     if (foundp) *foundp = false;
 971     return defval;
 972   }
 973
 974 static:
 975   static string classShortName (in TypeInfo_Class ct) pure nothrow @trusted @nogc {
 976     pragma(inline, true);
 977     if (ct is null) return null;
 978     string name = ct.name;
 979     auto dpos = name.lastIndexOf('.');
 980     return (dpos < 0 ? name : name[dpos+1..$]);
 981   }
 982 }
 983
 984
 985 abstract class EgraStyledClass {
 986 protected:
 987   // cached path to this object, w/o property name
 988   EgraCIString mCachedPath;
 989   WidgetStyle mStyleSheet;
 990   // for styles
 991   dynstring mId;
 992   dynstring mStyleClass;
 993   bool mStyleCloned;
 994
 995   // call when parent was changed
 996   final void invalidatePathCache () nothrow @trusted @nogc { pragma(inline, true); mCachedPath.clear(); }
 997
 998 public:
 999   bool isMyId (const(char)[] str) nothrow @trusted @nogc { return (str.length == 0 || str.strEquCI(mId.getData)); }
1000   bool isMyStyleClass (const(char)[] str) nothrow @trusted @nogc { return (str.length == 0 || str.strEquCI(mStyleClass.getData)); }
1001   bool isMyModifier (const(char)[] str) nothrow @trusted @nogc { return (str.length == 0 || str.strEquCI(getCurrentMod)); }
1002
1003   EgraStyledClass getParent () nothrow @trusted @nogc { return null; }
1004   EgraStyledClass getFirstChild () nothrow @trusted @nogc { return null; }
1005   EgraStyledClass getNextSibling () nothrow @trusted @nogc { return null; }
1006
1007   EgraStyledClass getTopLevel () nothrow @trusted @nogc {
1008     EgraStyledClass w = getParent();
1009     if (w is null) return null; // we are the top
1010     for (;;) {
1011       EgraStyledClass p = w.getParent();
1012       if (p is null) return w;
1013       w = p;
1014     }
1015   }
1016
1017   // empty `str` should return `true`
1018   bool isMyClassName (const(char)[] str) nothrow @trusted @nogc {
1019     return (str.length == 0 || str.strEquCI(classShortName(typeid(this))));
1020   }
1021
1022   // for styling
1023   EgraCIString getFullPath () nothrow @trusted @nogc {
1024     if (mCachedPath.length == 0) {
1025       mCachedPath.clear(); // just in case
1026       for (EgraStyledClass w = this; w !is null; w = w.getParent()) {
1027         mCachedPath ~= typeid(w).name;
1028         mCachedPath ~= "\x00"; // delimiter
1029         mCachedPath ~= mId;
1030         mCachedPath ~= "\x00"; // delimiter
1031         mCachedPath ~= mStyleClass;
1032         mCachedPath ~= "\x00"; // delimiter
1033       }
1034     }
1035     return mCachedPath;
1036   }
1037
1038   string getCurrentMod () nothrow @trusted @nogc { return ""; }
1039
1040   final WidgetStyle getStyle () nothrow @trusted @nogc {
1041     for (EgraStyledClass w = this; w !is null; w = w.getParent()) {
1042       if (w.mStyleSheet !is null) return w.mStyleSheet;
1043     }
1044     return defaultColorStyle;
1045   }
1046
1047   final @property dynstring id () const nothrow @trusted @nogc { pragma(inline, true); return dynstring(mId); }
1048   @property void id (const(char)[] v) nothrow @trusted @nogc {
1049     if (v.length != mId.length || !strEquCI(v, mId.getData)) invalidatePathCache();
1050     if (v != mId.getData) mId = v;
1051   }
1052
1053   final @property dynstring styleClass () const nothrow @trusted @nogc { pragma(inline, true); return dynstring(mStyleClass); }
1054   @property void styleClass (const(char)[] v) nothrow @trusted @nogc {
1055     if (v.length != mStyleClass.length || !strEquCI(v, mStyleClass.getData)) invalidatePathCache();
1056     if (v != mStyleClass.getData) mStyleClass = v;
1057   }
1058
1059 public:
1060   void widgetChanged () nothrow {}
1061
1062   void setStyle (WidgetStyle stl) {
1063     if (stl !is mStyleSheet) {
1064       mStyleSheet = stl;
1065       mStyleCloned = false;
1066       widgetChanged();
1067     }
1068   }
1069
1070   // this clones the style
1071   void appendStyle (const(char)[] str) {
1072     str = str.xstrip;
1073     if (str.length == 0) return;
1074     if (mStyleSheet is null) {
1075       mStyleSheet = new WidgetStyle;
1076       mStyleSheet.cloneFrom(defaultColorStyle);
1077       mStyleCloned = true;
1078     } else if (!mStyleCloned) {
1079       WidgetStyle ws = new WidgetStyle;
1080       ws.cloneFrom(mStyleSheet);
1081       mStyleSheet = ws;
1082       mStyleCloned = true;
1083     }
1084     mStyleSheet.parseStyle(str);
1085     widgetChanged();
1086   }
1087
1088 public:
1089   //this () {}
1090   ~this () nothrow @trusted @nogc { pragma(inline, true); mCachedPath.clear(); }
1091
1092 public:
1093   static template isGoodSelectorDelegate(DG) {
1094     import std.traits;
1095     enum isGoodSelectorDelegate =
1096       (is(ReturnType!DG == void) || is(ReturnType!DG == EgraStyledClass) || is(ReturnType!DG == bool)) &&
1097       is(typeof((inout int=0) { DG dg = void; EgraStyledClass w; dg(w); }));
1098   }
1099
1100   final EgraStyledClass forEachSelector(DG) (const(char)[] sel, scope DG dg) if (isGoodSelectorDelegate!DG) {
1101     import std.traits;
1102     for (EgraStyledClass w = getFirstChild(); w !is null; w = w.getNextSibling()) {
1103       if (EgraStyledClass res = w.forEachSelector(sel, dg)) return res;
1104     }
1105     bool modhit;
1106     if (!isMySelector(sel, &modhit)) return null;
1107     if (!modhit) return null;
1108     static if (is(ReturnType!DG == void)) {
1109       dg(this);
1110       return null;
1111     } else static if (is(ReturnType!DG == bool)) {
1112       if (dg(this)) return this;
1113       return null;
1114     } else static if (is(ReturnType!DG == EgraStyledClass)) {
1115       if (EgraStyledClass res = dg(this)) return res;
1116       return null;
1117     } else {
1118       static assert(0, "wtf?!");
1119     }
1120   }
1121
1122   final T querySelectorInternal(T:EgraStyledClass) (const(char)[] sel) {
1123     import std.traits;
1124     for (EgraStyledClass w = getFirstChild(); w !is null; w = w.getNextSibling()) {
1125       if (EgraStyledClass res = w.querySelector!T(sel)) return cast(T)res;
1126     }
1127     bool modhit;
1128     if (isMySelector(sel, &modhit)) {
1129       if (modhit) return cast(T)this;
1130     }
1131     return null;
1132   }
1133
1134   final T querySelector(T:EgraStyledClass=EgraStyledClass) (const(char)[] sel) { pragma(inline, true); return querySelectorInternal!T(sel); }
1135
1136   static template isGoodIteratorDelegate(DG, T) {
1137     import std.traits;
1138     enum isGoodIteratorDelegate =
1139       (is(ReturnType!DG == int)) &&
1140       is(typeof((inout int=0) { DG dg = void; /*EgraStyledClass*/T w; int res = dg(w); }));
1141   }
1142
1143   static struct Iter(T) {
1144     EgraStyledClass c;
1145     dynstring sel;
1146
1147     this (EgraStyledClass cc, const(char)[] asel) nothrow @safe @nogc {
1148       pragma(inline, true);
1149       asel = asel.xstrip;
1150       if (asel.length) { c = cc; sel = asel; }
1151     }
1152
1153     int opApply(DG) (scope DG dg) if (isGoodIteratorDelegate!(DG, T)) {
1154       int res = 0;
1155       if (c is null || dg is null) return 0;
1156       c.forEachSelector(sel.getData, (EgraStyledClass w) {
1157         if (auto cw = cast(T)w) {
1158           res = dg(cw);
1159         }
1160         return (res != 0);
1161       });
1162       return res;
1163     }
1164   }
1165
1166   final auto querySelectorAll(T:EgraStyledClass=EgraStyledClass) (const(char)[] sel) nothrow @safe @nogc { pragma(inline, true); return Iter!T(this, sel); }
1167
1168 public:
1169   static string classShortName (in TypeInfo_Class ct) pure nothrow @trusted @nogc {
1170     pragma(inline, true);
1171     if (ct is null) return null;
1172     string name = ct.name;
1173     auto dpos = name.lastIndexOf('.');
1174     return (dpos < 0 ? name : name[dpos+1..$]);
1175   }
1176
1177   // `from`, or any superclass
1178   static bool isChildOf (in TypeInfo_Class from, const(char)[] cls) pure nothrow @trusted @nogc {
1179     cls = cls.xstrip;
1180     if (cls.length == 0) return false;
1181     // sorry for this cast
1182     for (TypeInfo_Class ti = cast(TypeInfo_Class)from; ti !is null; ti = ti.base) {
1183       if (cls.strEquCI(classShortName(ti))) {
1184         version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "%.*s: isGoodMyClass: cls=<%.*s>  TRUE\n",
1185           cast(uint)ti.name.length, ti.name.ptr, cast(uint)cls.length, cls.ptr); }
1186         return true;
1187       }
1188       version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "%.*s: isGoodMyClass: cls=<%.*s>  FALSE\n",
1189         cast(uint)ti.name.length, ti.name.ptr, cast(uint)cls.length, cls.ptr); }
1190     }
1191     return false;
1192   }
1193
1194   static bool isIdChar (in char ch) pure nothrow @trusted @nogc {
1195     pragma(inline, true);
1196     return
1197       (ch >= '0' && ch <= '9') ||
1198       (ch >= 'A' && ch <= 'Z') ||
1199       (ch >= 'a' && ch <= 'z') ||
1200       ch == '_' || ch == '-';
1201   }
1202
1203   // leading and trailing spaces should be stripped
1204   // also, there should be no spaces inside the string
1205   final bool checkOneSelector (const(char)[] sel, const(char)[] cnoverride, out bool modhit, out bool modseen, in bool asQuery) nothrow @trusted @nogc {
1206     modhit = true;
1207     modseen = false;
1208     //sel = sel.xstrip;
1209     version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "%.*s: checkOneSelector: s=<%.*s>\n",
1210       cast(uint)typeid(this).name.length, typeid(this).name.ptr, cast(uint)sel.length, sel.ptr); }
1211     if (sel.length == 0) return false;
1212     usize epos = 0;
1213     while (epos < sel.length && isIdChar(sel.ptr[epos])) ++epos;
1214     const(char)[] cls = sel[0..epos];
1215     if (cls.length != 0) {
1216       if (cnoverride.length) {
1217         if (!cnoverride.strEquCI(cls)) return false;
1218       } else {
1219         if (!isMyClassName(cls)) return false;
1220       }
1221     }
1222     sel = sel[epos..$];
1223     // check id and style class
1224     while (sel.length) {
1225       immutable char ch = sel.ptr[0];
1226       if (ch != '.' && ch != '#' && ch != ':') return false;
1227       epos = 1;
1228       while (epos < sel.length && isIdChar(sel.ptr[epos])) ++epos;
1229       const(char)[] nm = sel[1..epos];
1230       sel = sel[epos..$];
1231       final switch (ch) {
1232         case '.': if (!isMyStyleClass(nm)) return false; break;
1233         case '#': if (!isMyId(nm)) return false; break;
1234         case ':': // all modifiers must match
1235           modseen = true;
1236           if (!isMyModifier(nm)) {
1237             debug conwriteln("CHECKONE(", typeid(this).name, "): mod=<", nm, ">: NOT MATCHED! (", getCurrentMod, ")");
1238             modhit = false;
1239           } else {
1240             debug conwriteln("CHECKONE(", typeid(this).name, "): mod=<", nm, ">: MATCHED! (", getCurrentMod, ")");
1241           }
1242           break;
1243       }
1244     }
1245     if (!modseen && !asQuery && getCurrentMod().length) modhit = false;
1246     return true;
1247   }
1248
1249   final bool isMySelector (const(char)[] sel, const(char)[] clnameoverride,
1250                            bool* modhit=null, bool* modseen=null,
1251                            in bool asQuery=true) nothrow @trusted @nogc
1252   {
1253     bool tmpmh, tmpms;
1254     if (modhit) *modhit = false;
1255     if (modseen) *modseen = false;
1256     sel = sel.xstrip;
1257     if (sel.length == 0) return false;
1258     // check object class name
1259     usize epos = sel.length;
1260     while (epos > 0) {
1261       immutable char ch = sel[epos-1];
1262       if (ch <= ' ' || ch == '>') break;
1263       --epos;
1264     }
1265     if (!checkOneSelector(sel[epos..$], clnameoverride, tmpmh, tmpms, asQuery)) {
1266       return false;
1267     }
1268     if (modhit) *modhit = tmpmh;
1269     if (modseen) *modseen = tmpms;
1270     sel = sel[0..epos].xstripright;
1271     if (sel.length == 0) return true;
1272     immutable bool oneParent = (sel[$-1] == '>');
1273     if (oneParent) {
1274       sel = sel[0..$-1].xstripright;
1275       if (sel.length == 0) return true;
1276       if (sel[$-1] == '>') return false;
1277     }
1278     version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "%.*s: isMySelector: oneParent=%d\n",
1279       cast(uint)typeid(this).name.length, typeid(this).name.ptr, cast(int)oneParent); }
1280     // sorry for this cast
1281     for (EgraStyledClass w = (cast(EgraStyledClass)this).getParent(); w !is null; w = w.getParent()) {
1282       version(none) { import core.stdc.stdio : stderr, fprintf; fprintf(stderr, "%.*s: isMySelector: parent=<%.*s>; oneParent=%d\n",
1283         cast(uint)typeid(this).name.length, typeid(this).name.ptr, cast(uint)typeid(w).name.length, typeid(w).name.ptr, cast(int)oneParent); }
1284       if (w.isMySelector(sel, null, null, null, asQuery:asQuery)) return true;
1285       if (oneParent) return false;
1286     }
1287     return false;
1288   }
1289
1290   final bool isMySelector (const(char)[] sel, bool* modhit=null) nothrow @trusted @nogc {
1291     pragma(inline, true);
1292     return isMySelector(sel, null, modhit);
1293   }
1294
1295 public:
1296   // returns gxUnknown if not found
1297   final uint getColor (const(char)[] prop, bool* foundp=null) @trusted nothrow {
1298     pragma(inline, true);
1299     return getStyle().findColor(this, prop, foundp);
1300   }
1301
1302   // returns empty string if not found
1303   final dynstring getString (const(char)[] prop, bool* foundp=null) @trusted nothrow {
1304     pragma(inline, true);
1305     return getStyle().findString(this, prop, foundp);
1306   }
1307
1308   final int getInt (const(char)[] prop, in int defval=0, bool* foundp=null) @trusted nothrow {
1309     pragma(inline, true);
1310     return getStyle().findInt(this, prop, defval, foundp);
1311   }
1312 }
1313
1314
1315 __gshared WidgetStyle defaultColorStyle;
1316
1317 shared static this () {
1318   defaultColorStyle = new WidgetStyle;
1319   defaultColorStyle.parseStyle(defaultStyleText);
1320 }