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annotate lib/js/urweb.js @ 2009:799be3911ce3

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Monadic bind supports patterns
author Adam Chlipala <adam@chlipala.net>
date Fri, 02 May 2014 17:16:02 -0400
parents 93ff76058825
children 2b2d07946e65
rev   line source
adamc@1036 1 // Detect browser quirks that we should be aware of.
adamc@1036 2
adamc@1036 3 function needsDynPrefix() {
adamc@1260 4 var span = document.createElement("span");
adamc@1260 5 span.innerHTML = "<script>alert('test');</script>";
adamc@1260 6 var scripts = span.getElementsByTagName("script");
adamc@1260 7 return scripts.length == 0;
adamc@1036 8 }
adamc@1036 9
adamc@1036 10 var dynPrefix = needsDynPrefix() ? "<span style=\"display:none\">A</span>" : "";
adamc@1036 11
adamc@970 12 // Function versions of operators
adamc@970 13
adamc@970 14 function not(x) { return !x; }
adamc@970 15 function neg(x) { return -x; }
adamc@970 16
adamc@970 17 function eq(x, y) { return x == y; }
adamc@970 18 function plus(x, y) { return x + y; }
adamc@970 19 function minus(x, y) { return x - y; }
adamc@970 20 function times(x, y) { return x * y; }
adamc@970 21 function div(x, y) { return x / y; }
adam@1619 22 function divInt(x, y) { if (y == 0) er("Division by zero"); var n = x / y; return n < 0 ? Math.ceil(n) : Math.floor(n); }
adamc@970 23 function mod(x, y) { return x % y; }
adam@1619 24 function modInt(x, y) { if (y == 0) er("Division by zero"); var n = x % y; return n < 0 ? Math.ceil(n) : Math.floor(n); }
adamc@970 25 function lt(x, y) { return x < y; }
adamc@970 26 function le(x, y) { return x <= y; }
adamc@970 27
adamc@1061 28 // Characters
adamc@1061 29
adamc@1061 30 function isLower(c) { return c >= 'a' && c <= 'z'; }
adamc@1061 31 function isUpper(c) { return c >= 'A' && c <= 'Z'; }
adamc@1061 32 function isAlpha(c) { return isLower(c) || isUpper(c); }
adamc@1061 33 function isDigit(c) { return c >= '0' && c <= '9'; }
adamc@1061 34 function isAlnum(c) { return isAlpha(c) || isDigit(c); }
adamc@1061 35 function isBlank(c) { return c == ' ' || c == '\t'; }
adamc@1061 36 function isSpace(c) { return isBlank(c) || c == '\r' || c == '\n'; }
adamc@1061 37 function isXdigit(c) { return isDigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'); }
adam@1927 38 function ord(c) { return c.charCodeAt(0); }
adam@1927 39 function isPrint(c) { return ord(c) > 31 && ord(c) < 127; }
adamc@1177 40 function toLower(c) { return c.toLowerCase(); }
adamc@1177 41 function toUpper(c) { return c.toUpperCase(); }
adamc@1061 42
adamc@692 43 // Lists
adamc@692 44
adamc@580 45 function cons(v, ls) {
adamc@1260 46 return { next : ls, data : v };
adamc@690 47 }
adamc@969 48 function rev(ls) {
adamc@1260 49 var acc = null;
adamc@1260 50 for (; ls; ls = ls.next)
adam@1643 51 acc = cons(ls.data, acc);
adamc@1260 52 return acc;
adamc@969 53 }
adamc@690 54 function concat(ls1, ls2) {
adamc@1260 55 var acc = ls2;
adamc@1260 56 ls1 = rev(ls1);
adamc@1260 57 for (; ls1; ls1 = ls1.next)
adamc@1260 58 acc = cons(ls1.data, acc);
adamc@1260 59 return acc;
adamc@690 60 }
adamc@690 61 function member(x, ls) {
adamc@1260 62 for (; ls; ls = ls.next)
adamc@1260 63 if (ls.data == x)
adamc@1260 64 return true;
adamc@1260 65 return false;
adamc@690 66 }
adamc@690 67 function remove(x, ls) {
adamc@1260 68 var acc = null;
adamc@969 69
adamc@1260 70 for (; ls; ls = ls.next)
adamc@1260 71 if (ls.data == x)
adamc@1260 72 return concat(acc, ls.next);
adamc@1260 73 else
adamc@1260 74 acc = cons(ls.data, acc);
adamc@969 75
adamc@1260 76 return ls;
adamc@690 77 }
adamc@690 78 function union(ls1, ls2) {
adamc@1260 79 var acc = ls2;
adamc@969 80
adamc@1260 81 for (; ls1; ls1 = ls1.next)
adamc@1260 82 if (!member(ls1.data, ls2))
adamc@1260 83 acc = cons(ls1.data, acc);
adamc@969 84
adamc@1260 85 return acc;
adamc@580 86 }
adamc@703 87 function length(ls) {
adamc@1260 88 var acc = 0;
adamc@969 89
adamc@1260 90 for (; ls; ls = ls.next)
adamc@1260 91 ++acc;
adamc@969 92
adamc@1260 93 return acc;
adamc@703 94 }
adamc@670 95
adamc@690 96
adam@1571 97 // Floats
adam@1571 98
adam@1571 99 function float(n) {
adam@1571 100 return n;
adam@1571 101 }
adam@1571 102
adam@1571 103 function trunc(n) {
adam@1571 104 return ~~n;
adam@1571 105 }
adam@1571 106
adam@1571 107 function ceil(n) {
adam@1571 108 return Math.ceil(n);
adam@1571 109 }
adam@1571 110
adam@1571 111 function round(n) {
adam@1571 112 return Math.round(n);
adam@1571 113 }
adam@1571 114
adam@1571 115
adam@1599 116 // Time, represented as counts of microseconds since the epoch
adam@1487 117
adam@1629 118 var time_format = "%c";
adam@1629 119
adam@1487 120 function showTime(tm) {
adam@1629 121 return strftime(time_format, tm);
adam@1629 122 }
adam@1629 123
adam@1629 124 function showTimeHtml(tm) {
adam@1629 125 return eh(showTime(tm));
adam@1487 126 }
adam@1487 127
adam@1487 128 function now() {
adam@1487 129 return (new Date()).getTime() * 1000;
adam@1487 130 }
adam@1487 131
adam@1514 132 function diffInSeconds(tm1, tm2) {
adam@1514 133 return Math.round((tm2 - tm1) / 1000000);
adam@1514 134 }
adam@1514 135
adam@1685 136 function diffInMilliseconds(tm1, tm2) {
adam@1685 137 return Math.round((tm2 - tm1) / 1000);
adam@1685 138 }
adam@1685 139
adam@1514 140 function toSeconds(tm) {
adam@1514 141 return Math.round(tm / 1000000);
adam@1514 142 }
adam@1514 143
adam@1685 144 function toMilliseconds(tm) {
adam@1685 145 return Math.round(tm / 1000);
adam@1685 146 }
adam@1685 147
adam@1518 148 function addSeconds(tm, n) {
adam@1518 149 return tm + n * 1000000;
adam@1518 150 }
adam@1518 151
adam@1599 152 function stringToTime_error(string) {
adam@1599 153 var t = Date.parse(string);
adam@1599 154 if (isNaN(t))
adam@1632 155 er("Invalid date string: " + string);
adam@1599 156 else
adam@1599 157 return t * 1000;
adam@1599 158 }
adam@1599 159
adam@1599 160 function stringToTime(string) {
adam@1599 161 try {
adam@1599 162 var t = Date.parse(string);
adam@1599 163 if (isNaN(t))
adam@1599 164 return null;
adam@1599 165 else
adam@1599 166 return t * 1000;
adam@1599 167 } catch (e) {
adam@1599 168 return null;
adam@1599 169 }
rmbruijn@1597 170 }
rmbruijn@1597 171
adam@1609 172 /*
adam@1615 173 strftime() implementation from:
adam@1615 174 YUI 3.4.1 (build 4118)
adam@1615 175 Copyright 2011 Yahoo! Inc. All rights reserved.
adam@1615 176 Licensed under the BSD License.
adam@1615 177 http://yuilibrary.com/license/
adam@1615 178 */
adam@1609 179
adam@1615 180 var xPad=function (x, pad, r)
adam@1615 181 {
adam@1615 182 if(typeof r === "undefined")
adam@1615 183 {
adam@1615 184 r=10;
adam@1615 185 }
adam@1615 186 pad = pad.toString();
adam@1615 187 for( ; parseInt(x, 10)<r && r>1; r/=10) {
adam@1615 188 x = pad + x;
adam@1615 189 }
adam@1615 190 return x.toString();
adam@1615 191 };
adam@1609 192
adam@1615 193 var YDateEn = {
adam@1615 194 a: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
adam@1615 195 A: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
adam@1615 196 b: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
adam@1615 197 B: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
adam@1615 198 c: "%a %d %b %Y %T %Z",
adam@1615 199 p: ["AM", "PM"],
adam@1615 200 P: ["am", "pm"],
adam@1615 201 r: "%I:%M:%S %p",
adam@1615 202 x: "%d/%m/%y",
adam@1615 203 X: "%T"
adam@1615 204 };
adam@1609 205
adam@1615 206 var Dt = {
adam@1615 207 formats: {
adam@1615 208 a: function (d, l) { return l.a[d.getDay()]; },
adam@1615 209 A: function (d, l) { return l.A[d.getDay()]; },
adam@1615 210 b: function (d, l) { return l.b[d.getMonth()]; },
adam@1615 211 B: function (d, l) { return l.B[d.getMonth()]; },
adam@1615 212 C: function (d) { return xPad(parseInt(d.getFullYear()/100, 10), 0); },
adam@1615 213 d: ["getDate", "0"],
adam@1615 214 e: ["getDate", " "],
adam@1615 215 g: function (d) { return xPad(parseInt(Dt.formats.G(d)%100, 10), 0); },
adam@1615 216 G: function (d) {
adam@1615 217 var y = d.getFullYear();
adam@1615 218 var V = parseInt(Dt.formats.V(d), 10);
adam@1615 219 var W = parseInt(Dt.formats.W(d), 10);
phurst@1986 220
adam@1615 221 if(W > V) {
adam@1615 222 y++;
adam@1615 223 } else if(W===0 && V>=52) {
adam@1615 224 y--;
adam@1615 225 }
phurst@1986 226
adam@1615 227 return y;
adam@1615 228 },
adam@1615 229 H: ["getHours", "0"],
adam@1615 230 I: function (d) { var I=d.getHours()%12; return xPad(I===0?12:I, 0); },
adam@1615 231 j: function (d) {
adam@1615 232 var gmd_1 = new Date("" + d.getFullYear() + "/1/1 GMT");
adam@1615 233 var gmdate = new Date("" + d.getFullYear() + "/" + (d.getMonth()+1) + "/" + d.getDate() + " GMT");
adam@1615 234 var ms = gmdate - gmd_1;
adam@1615 235 var doy = parseInt(ms/60000/60/24, 10)+1;
adam@1615 236 return xPad(doy, 0, 100);
adam@1615 237 },
adam@1615 238 k: ["getHours", " "],
adam@1615 239 l: function (d) { var I=d.getHours()%12; return xPad(I===0?12:I, " "); },
adam@1615 240 m: function (d) { return xPad(d.getMonth()+1, 0); },
adam@1615 241 M: ["getMinutes", "0"],
adam@1615 242 p: function (d, l) { return l.p[d.getHours() >= 12 ? 1 : 0 ]; },
adam@1615 243 P: function (d, l) { return l.P[d.getHours() >= 12 ? 1 : 0 ]; },
adam@1615 244 s: function (d, l) { return parseInt(d.getTime()/1000, 10); },
adam@1615 245 S: ["getSeconds", "0"],
adam@1615 246 u: function (d) { var dow = d.getDay(); return dow===0?7:dow; },
adam@1615 247 U: function (d) {
adam@1615 248 var doy = parseInt(Dt.formats.j(d), 10);
adam@1615 249 var rdow = 6-d.getDay();
adam@1615 250 var woy = parseInt((doy+rdow)/7, 10);
adam@1615 251 return xPad(woy, 0);
adam@1615 252 },
adam@1615 253 V: function (d) {
adam@1615 254 var woy = parseInt(Dt.formats.W(d), 10);
adam@1615 255 var dow1_1 = (new Date("" + d.getFullYear() + "/1/1")).getDay();
adam@1615 256 var idow = woy + (dow1_1 > 4 || dow1_1 <= 1 ? 0 : 1);
adam@1615 257 if(idow === 53 && (new Date("" + d.getFullYear() + "/12/31")).getDay() < 4)
adam@1615 258 {
adam@1615 259 idow = 1;
adam@1615 260 }
adam@1615 261 else if(idow === 0)
adam@1615 262 {
adam@1615 263 idow = Dt.formats.V(new Date("" + (d.getFullYear()-1) + "/12/31"));
adam@1615 264 }
phurst@1986 265
adam@1615 266 return xPad(idow, 0);
adam@1615 267 },
adam@1615 268 w: "getDay",
adam@1615 269 W: function (d) {
adam@1615 270 var doy = parseInt(Dt.formats.j(d), 10);
adam@1615 271 var rdow = 7-Dt.formats.u(d);
adam@1615 272 var woy = parseInt((doy+rdow)/7, 10);
adam@1615 273 return xPad(woy, 0, 10);
adam@1615 274 },
adam@1615 275 y: function (d) { return xPad(d.getFullYear()%100, 0); },
adam@1615 276 Y: "getFullYear",
adam@1615 277 z: function (d) {
adam@1615 278 var o = d.getTimezoneOffset();
adam@1615 279 var H = xPad(parseInt(Math.abs(o/60), 10), 0);
adam@1615 280 var M = xPad(Math.abs(o%60), 0);
adam@1615 281 return (o>0?"-":"+") + H + M;
adam@1615 282 },
adam@1615 283 Z: function (d) {
adam@1615 284 var tz = d.toString().replace(/^.*:\d\d( GMT[+-]\d+)? \(?([A-Za-z ]+)\)?\d*$/, "$2").replace(/[a-z ]/g, "");
adam@1615 285 if(tz.length > 4) {
adam@1615 286 tz = Dt.formats.z(d);
adam@1615 287 }
adam@1615 288 return tz;
adam@1615 289 },
adam@1615 290 "%": function (d) { return "%"; }
adam@1615 291 },
adam@1615 292
adam@1615 293 aggregates: {
adam@1615 294 c: "locale",
adam@1615 295 D: "%m/%d/%y",
adam@1615 296 F: "%Y-%m-%d",
adam@1615 297 h: "%b",
adam@1615 298 n: "\n",
adam@1615 299 r: "%I:%M:%S %p",
adam@1615 300 R: "%H:%M",
adam@1615 301 t: "\t",
adam@1615 302 T: "%H:%M:%S",
adam@1615 303 x: "locale",
adam@1615 304 X: "locale"
adam@1615 305 },
adam@1615 306
adam@1615 307 format : function (oDate, format) {
adam@1615 308 var replace_aggs = function (m0, m1) {
adam@1615 309 var f = Dt.aggregates[m1];
adam@1615 310 return (f === "locale" ? YDateEn[m1] : f);
adam@1615 311 };
adam@1615 312
adam@1615 313 var replace_formats = function (m0, m1) {
adam@1615 314 var f = Dt.formats[m1];
adam@1615 315 switch(typeof f) {
adam@1615 316 case "string":
adam@1615 317 return oDate[f]();
adam@1615 318 case "function":
adam@1615 319 return f.call(oDate, oDate, YDateEn);
adam@1615 320 case "array":
adam@1615 321 case "object":
adam@1615 322 if(typeof(f[0]) === "string")
adam@1615 323 return xPad(oDate[f[0]](), f[1]);
adam@1615 324 default:
adam@1615 325 return m1;
adam@1615 326 }
adam@1615 327 };
adam@1615 328
adam@1615 329 while(format.match(/%[cDFhnrRtTxX]/)) {
adam@1615 330 format = format.replace(/%([cDFhnrRtTxX])/g, replace_aggs);
adam@1609 331 }
adam@1615 332
adam@1615 333 var str = format.replace(/%([aAbBCdegGHIjklmMpPsSuUVwWyYzZ%])/g, replace_formats);
adam@1615 334
adam@1615 335 replace_aggs = replace_formats = undefined;
adam@1615 336
adam@1615 337 return str;
adam@1615 338 }
adam@1609 339 };
adam@1609 340
adam@1615 341 // End of YUI code
adam@1609 342
adam@1609 343 function strftime(fmt, thisTime)
adam@1609 344 {
adam@1609 345 var thisDate = new Date();
adam@1622 346 thisDate.setTime(Math.floor(thisTime / 1000));
adam@1615 347 return Dt.format(thisDate, fmt);
phurst@1986 348 };
phurst@1986 349
phurst@1986 350 function fromDatetime(year, month, date, hour, minute, second) {
phurst@1986 351 return (new Date(year, month, date, hour, minute, second)).getTime() * 1000;
phurst@1986 352 };
phurst@1986 353
phurst@1986 354 function datetimeYear(t) {
phurst@1986 355 return (new Date(t / 1000)).getYear() + 1900;
phurst@1986 356 };
phurst@1986 357
phurst@1986 358 function datetimeMonth(t) {
phurst@1986 359 return (new Date(t / 1000)).getMonth();
phurst@1986 360 };
phurst@1986 361
phurst@1986 362 function datetimeDay(t) {
phurst@1986 363 return (new Date(t / 1000)).getDate();
phurst@1986 364 };
phurst@1986 365
phurst@1986 366 function datetimeHour(t) {
phurst@1986 367 return (new Date(t / 1000)).getHours();
phurst@1986 368 };
phurst@1986 369
phurst@1986 370 function datetimeMinute(t) {
phurst@1986 371 return (new Date(t / 1000)).getMinutes();
phurst@1986 372 };
phurst@1986 373
phurst@1986 374 function datetimeSecond(t) {
phurst@1986 375 return (new Date(t / 1000)).getSeconds();
phurst@1986 376 };
phurst@1986 377
phurst@1986 378 function datetimeDayOfWeek(t) {
phurst@1986 379 return (new Date(t / 1000)).getDay();
phurst@1986 380 };
adam@1609 381
adam@1487 382
adamc@729 383 // Error handling
adamc@729 384
adam@1625 385 function uw_debug(msg) {
adam@1625 386 try {
adam@1625 387 console.debug(msg);
adam@1625 388 } catch (e) {
adam@1625 389 alert("DEBUG: " + msg);
adam@1625 390 }
adam@1625 391
adam@1625 392 return 0;
adam@1625 393 }
adam@1625 394
adamc@729 395 function whine(msg) {
adamc@1260 396 alert(msg);
adamc@1260 397 throw msg;
adamc@729 398 }
adamc@729 399
adamc@810 400 function pf(loc) {
adamc@1260 401 throw ("Pattern match failure (" + loc + ")");
adamc@729 402 }
adamc@729 403
adam@1553 404 var lameDuck = false;
adam@1553 405
adamc@798 406 function runHandlers(kind, ls, arg) {
adam@1553 407 if (!lameDuck) {
adam@1553 408 if (ls == null)
adam@1553 409 alert(kind + ": " + arg);
adam@1553 410 for (; ls; ls = ls.next)
adam@1553 411 try {
adam@1890 412 exec({c:"a", f:{c:"a", f:ls.data, x:{c:"c", v:arg}}, x:{c:"c", v:null}});
adam@1553 413 } catch (v) { }
adam@1553 414 }
adamc@729 415 }
adamc@729 416
adamc@729 417 var errorHandlers = null;
adamc@729 418
adam@1890 419 function flift0(v) {
adam@1890 420 return {c:"c", v:v};
adam@1890 421 }
adam@1890 422
adamc@729 423 function onError(f) {
adam@1890 424 errorHandlers = cons(flift0(f), errorHandlers);
adamc@729 425 }
adamc@729 426
adamc@729 427 function er(s) {
adamc@1260 428 runHandlers("Error", errorHandlers, s);
adamc@1260 429 throw {uw_error: s};
adamc@729 430 }
adamc@729 431
adamc@729 432 var failHandlers = null;
adamc@729 433
adamc@729 434 function onFail(f) {
adam@1890 435 failHandlers = cons(flift0(f), failHandlers);
adamc@729 436 }
adamc@729 437
adamc@729 438 function doExn(v) {
adamc@1260 439 if (v == null || v.uw_error == null) {
adamc@1260 440 var s = (v == null ? "null" : v.message ? v.message : v.toString());
adamc@1260 441 if (v != null && v.fileName && v.lineNumber)
adamc@1260 442 s += " (" + v.fileName + ":" + v.lineNumber + ")";
adamc@1260 443 runHandlers("Fail", failHandlers, s);
adamc@1260 444 }
adamc@729 445 }
adamc@729 446
adamc@729 447 var disconnectHandlers = null;
adamc@729 448
adamc@976 449 function flift(f) {
kkallio@1484 450 return {c: "c", v:{env:cons(f,null), body:{c:"v", n:1}}};
adamc@976 451 }
adamc@976 452
adamc@729 453 function onDisconnect(f) {
adamc@1260 454 disconnectHandlers = cons(flift(f), disconnectHandlers);
adamc@729 455 }
adamc@729 456
adamc@729 457 function discon() {
adamc@1260 458 runHandlers("Disconnect", disconnectHandlers, null);
adamc@729 459 }
adamc@729 460
adamc@729 461 var connectHandlers = null;
adamc@729 462
adamc@729 463 function onConnectFail(f) {
adamc@1260 464 connectHandlers = cons(flift(f), connectHandlers);
adamc@729 465 }
adamc@729 466
adamc@729 467 function conn() {
adamc@1260 468 runHandlers("Connect", connectHandlers, null);
adamc@729 469 }
adamc@729 470
adamc@729 471 var serverHandlers = null;
adamc@729 472
adamc@729 473 function onServerError(f) {
adam@1890 474 serverHandlers = cons(flift0(f), serverHandlers);
adamc@729 475 }
adamc@729 476
adamc@729 477 function servErr(s) {
adamc@1260 478 window.setTimeout(function () { runHandlers("Server", serverHandlers, s); }, 0);
adamc@729 479 }
adamc@729 480
adam@1783 481 // Key and mouse events
adam@1555 482
adam@1555 483 var uw_event = null;
adam@1555 484
adam@1783 485 function uw_getEvent() {
adam@1783 486 return window.event ? window.event : uw_event;
adam@1555 487 }
adam@1555 488
adam@1783 489 function firstGood(x, y) {
adam@1783 490 if (x == undefined || x == 0)
adam@1783 491 return y;
adam@1783 492 else
adam@1783 493 return x;
adam@1783 494 }
adam@1783 495
adam@1783 496 function uw_mouseEvent() {
adam@1783 497 var ev = uw_getEvent();
adam@1783 498
adam@1783 499 return {_ScreenX : firstGood(ev.screenX, 0),
adam@1783 500 _ScreenY : firstGood(ev.screenY, 0),
adam@1783 501 _ClientX : firstGood(ev.clientX, 0),
adam@1783 502 _ClientY : firstGood(ev.clientY, 0),
adam@1783 503 _CtrlKey : firstGood(ev.ctrlKey, false),
adam@1783 504 _ShiftKey : firstGood(ev.shiftKey, false),
adam@1783 505 _AltKey : firstGood(ev.altKey, false),
adam@1783 506 _MetaKey : firstGood(ev.metaKey, false),
adam@1783 507 _Button : ev.button == 2 ? "Right" : ev.button == 1 ? "Middle" : "Left"};
adam@1783 508 }
adam@1783 509
adam@1783 510 function uw_keyEvent() {
adam@1783 511 var ev = uw_getEvent();
adam@1783 512
adam@1783 513 return {_KeyCode : firstGood(ev.keyCode, ev.which),
adam@1783 514 _CtrlKey : firstGood(ev.ctrlKey, false),
adam@1783 515 _ShiftKey : firstGood(ev.shiftKey, false),
adam@1783 516 _AltKey : firstGood(ev.altKey, false),
adam@1783 517 _MetaKey : firstGood(ev.metaKey, false)};
adam@1783 518 }
adam@1783 519
adam@1783 520
adam@1783 521
adam@1555 522 // Document events
adam@1555 523
adam@1555 524 function uw_handler(name, f) {
adam@1555 525 var old = document[name];
adam@1555 526 if (old == undefined)
adam@1783 527 document[name] = function(event) { uw_event = event; execF(execF(f, uw_mouseEvent())); };
adam@1555 528 else
adam@1783 529 document[name] = function(event) { uw_event = event; old(); execF(execF(f, uw_mouseEvent())); };
adam@1555 530 }
adam@1555 531
adam@1555 532 function uw_onClick(f) {
adam@1555 533 uw_handler("onclick", f);
adam@1555 534 }
adam@1555 535
adam@1555 536 function uw_onDblclick(f) {
adam@1555 537 uw_handler("ondblclick", f);
adam@1555 538 }
adam@1555 539
adam@1555 540 function uw_onMousedown(f) {
adam@1555 541 uw_handler("onmousedown", f);
adam@1555 542 }
adam@1555 543
adam@1791 544 function uw_onMousemove(f) {
adam@1791 545 uw_handler("onmousemove", f);
adam@1791 546 }
adam@1791 547
adam@1791 548 function uw_onMouseout(f) {
adam@1791 549 uw_handler("onmouseout", f);
adam@1791 550 }
adam@1791 551
adam@1791 552 function uw_onMouseover(f) {
adam@1791 553 uw_handler("onmouseover", f);
adam@1791 554 }
adam@1791 555
adam@1555 556 function uw_onMouseup(f) {
adam@1555 557 uw_handler("onmouseup", f);
adam@1555 558 }
adam@1555 559
adam@1555 560 function uw_keyHandler(name, f) {
adam@1555 561 var old = document[name];
adam@1555 562 if (old == undefined)
adam@1783 563 document[name] = function(event) { uw_event = event; execF(execF(f, uw_keyEvent())); };
adam@1555 564 else
adam@1783 565 document[name] = function(event) { uw_event = event; old(); execF(execF(f, uw_keyEvent())); };
adam@1555 566 }
adam@1555 567
adam@1555 568 function uw_onKeydown(f) {
adam@1555 569 uw_keyHandler("onkeydown", f);
adam@1555 570 }
adam@1555 571
adam@1555 572 function uw_onKeypress(f) {
adam@1555 573 uw_keyHandler("onkeypress", f);
adam@1555 574 }
adam@1555 575
adam@1555 576 function uw_onKeyup(f) {
adam@1555 577 uw_keyHandler("onkeyup", f);
adam@1555 578 }
adam@1555 579
adam@1559 580 // Cancelling of further event processing
adam@1559 581
adam@1559 582 function uw_preventDefault() {
adam@1559 583 var e = window.event ? window.event : uw_event;
adam@1559 584 e.returnValue = false;
adam@1559 585 if (e.preventDefault) e.preventDefault();
adam@1559 586 }
adam@1559 587
adam@1559 588 function uw_stopPropagation() {
adam@1559 589 var e = window.event ? window.event : uw_event;
adam@1559 590 e.cancelBubble = true;
adam@1559 591 if (e.stopPropagation) e.stopPropagation();
adam@1559 592 }
adamc@729 593
adamc@692 594 // Embedding closures in XML strings
adamc@692 595
adamc@693 596 function cs(f) {
adamc@1260 597 return {closure: f};
adamc@693 598 }
adamc@693 599
adamc@693 600 function isWeird(v) {
adamc@1260 601 return v.closure != null || v.cat1 != null;
adamc@693 602 }
adamc@693 603
adamc@692 604 function cat(s1, s2) {
adamc@1260 605 if (isWeird(s1) || isWeird(s2))
adamc@1260 606 return {cat1: s1, cat2: s2};
adamc@1260 607 else
adamc@1260 608 return s1 + s2;
adamc@692 609 }
adamc@692 610
adamc@692 611 var closures = [];
adamc@703 612 var freeClosures = null;
adamc@692 613
adamc@692 614 function newClosure(f) {
adamc@1260 615 var n;
adamc@1260 616 if (freeClosures == null) {
adamc@1260 617 n = closures.length;
adamc@1260 618 } else {
adamc@1260 619 n = freeClosures.data;
adamc@1260 620 freeClosures = freeClosures.next;
adamc@1260 621 }
adamc@1260 622 closures[n] = f;
adamc@1260 623 return n;
adamc@692 624 }
adamc@692 625
adamc@703 626 function freeClosure(n) {
adamc@1260 627 closures[n] = null;
adamc@1260 628 freeClosures = cons(n, freeClosures);
adamc@703 629 }
adamc@703 630
adamc@692 631 function cr(n) {
adamc@1260 632 return closures[n];
adamc@692 633 }
adamc@692 634
vshabanoff@1813 635 function flattenAcc(a, cls, tr) {
vshabanoff@1813 636 if (tr.cat1 != null) {
vshabanoff@1813 637 flattenAcc(a, cls, tr.cat1);
vshabanoff@1813 638 flattenAcc(a, cls, tr.cat2);
vshabanoff@1813 639 } else if (tr.closure != null) {
adamc@1260 640 var cl = newClosure(tr.closure);
adamc@1260 641 cls.v = cons(cl, cls.v);
vshabanoff@1813 642 a.push("cr(", cl.toString(), ")");
adamc@1260 643 } else
vshabanoff@1813 644 a.push(tr);
vshabanoff@1813 645 }
vshabanoff@1813 646
vshabanoff@1813 647 function flatten(cls, tr) {
vshabanoff@1813 648 var a = [];
vshabanoff@1813 649 flattenAcc(a, cls, tr);
vshabanoff@1813 650 return a.join("");
adamc@692 651 }
adamc@692 652
adamc@728 653 function flattenLocal(s) {
adamc@1260 654 var cls = {v : null};
adamc@1260 655 var r = flatten(cls, s);
adamc@1260 656 for (cl = cls.v; cl != null; cl = cl.next)
adamc@1260 657 freeClosure(cl.data);
adamc@1260 658 return r;
adamc@728 659 }
adamc@728 660
adamc@692 661
adamc@692 662 // Dynamic tree management
adamc@692 663
adamc@690 664 function populate(node) {
adamc@1260 665 var s = node.signal;
adamc@1260 666 var oldSources = node.sources;
adamc@1260 667 try {
adamc@1260 668 var sr = execF(s, null);
adamc@1260 669 var newSources = sr._sources;
adamc@690 670
adamc@1260 671 for (var sp = oldSources; sp; sp = sp.next)
adamc@1260 672 if (!member(sp.data, newSources))
adamc@1260 673 sp.data.dyns = remove(node, sp.data.dyns);
adamc@690 674
adamc@1260 675 for (var sp = newSources; sp; sp = sp.next)
adamc@1260 676 if (!member(sp.data, oldSources))
adamc@1260 677 sp.data.dyns = cons(node, sp.data.dyns);
adamc@690 678
adamc@1260 679 node.sources = newSources;
adamc@1260 680 node.recreate(sr._data);
adamc@1260 681 } catch (v) {
adamc@1260 682 doExn(v);
adamc@1260 683 }
adamc@579 684 }
adamc@574 685
adamc@580 686 function sc(v) {
adamc@1260 687 return {data : v, dyns : null};
adamc@580 688 }
adamc@580 689 function sv(s, v) {
adam@1491 690 if (s.data != v) {
adam@1491 691 s.data = v;
adamc@967 692
adam@1491 693 for (var ls = s.dyns; ls; ls = ls.next)
adam@1491 694 if (!ls.dead)
adam@1491 695 populate(ls.data);
adam@1491 696 }
adamc@580 697 }
adamc@601 698 function sg(s) {
adamc@1260 699 return s.data;
adamc@601 700 }
adamc@579 701
adamc@580 702 function ss(s) {
adamc@1260 703 return {env:cons(s, null), body:{c:"r", l:
adamc@1260 704 cons({n:"sources", v:{c:"c", v:cons(s, null)}},
adamc@1260 705 cons({n:"data", v:{c:"f", f:sg, a:cons({c:"v", n:1}, null)}}, null))}};
adamc@580 706 }
adamc@580 707 function sr(v) {
adamc@1260 708 return {env:null, body:{c:"c", v:{_sources : null, _data : v}}};
adamc@580 709 }
adamc@580 710 function sb(x,y) {
adamc@1260 711 return {env:cons(y,cons(x,null)),
adamc@1260 712 body:{c:"=",
adamc@1260 713 e1:{c:"a", f:{c:"v", n:2}, x:{c:"c", v:null}},
adamc@1260 714 e2:{c:"=",
adamc@1260 715 e1:{c:"a",
adamc@1260 716 f:{c:"a", f:{c:"v", n:2}, x:{c:".", r:{c:"v", n:0}, f:"data"}},
adamc@1260 717 x:{c:"c", v:null}},
adamc@1260 718 e2:{c:"r", l:cons(
adamc@1260 719 {n:"sources", v:{c:"f", f:union, a:cons({c:".", r:{c:"v", n:1}, f:"sources"},
adamc@1260 720 cons({c:".", r:{c:"v", n:0}, f:"sources"}, null))}},
adamc@1260 721 cons({n:"data", v:{c:".", r:{c:"v", n:0}, f:"data"}}, null))}}}};
adamc@580 722 }
adamc@841 723 function scur(s) {
adamc@1260 724 return execF(s, null)._data;
adamc@841 725 }
adamc@571 726
adamc@604 727 function lastParent() {
adamc@1260 728 var pos = document.body;
adamc@604 729
adamc@1260 730 while (pos.lastChild && pos.lastChild.nodeType == 1)
adamc@1260 731 pos = pos.lastChild;
adamc@600 732
adamc@1260 733 pos = pos.parentNode;
adamc@1039 734
adamc@1260 735 return pos;
adamc@600 736 }
adamc@600 737
adam@1803 738 var thisScript = null;
adam@1803 739
adamc@604 740 function addNode(node) {
adam@1678 741 if (thisScript) {
adam@1678 742 if (thisScript.parentNode)
adam@1678 743 thisScript.parentNode.replaceChild(node, thisScript);
adam@1678 744 } else
adamc@1260 745 lastParent().appendChild(node);
adamc@603 746 }
adamc@603 747
adam@1803 748 function runScripts(node) {
adam@1803 749 if (node.tagName == "SCRIPT") {
adam@1803 750 var savedScript = thisScript;
adam@1803 751 thisScript = node;
phurst@1986 752
adam@1803 753 try {
adam@1803 754 eval(thisScript.text);
adam@1803 755 } catch (v) {
adam@1803 756 doExn(v);
adam@1803 757 }
adam@1803 758 if (thisScript.parentNode)
adam@1803 759 thisScript.parentNode.removeChild(thisScript);
adamc@690 760
adam@1803 761 thisScript = savedScript;
adam@1803 762 } else if (node.getElementsByTagName) {
adamc@1260 763 var savedScript = thisScript;
adamc@603 764
adamc@1260 765 var scripts = node.getElementsByTagName("script"), scriptsCopy = [];
adamc@1260 766 var len = scripts.length;
adamc@1260 767 for (var i = 0; i < len; ++i)
adamc@1260 768 scriptsCopy[i] = scripts[i];
adamc@1260 769 for (var i = 0; i < len; ++i) {
adamc@1260 770 thisScript = scriptsCopy[i];
adamc@1039 771
adamc@1260 772 try {
adamc@1260 773 eval(thisScript.text);
adamc@1260 774 } catch (v) {
adamc@1260 775 doExn(v);
adamc@1260 776 }
adamc@1260 777 if (thisScript.parentNode)
adamc@1260 778 thisScript.parentNode.removeChild(thisScript);
adamc@1260 779 }
adamc@1260 780
adamc@1260 781 thisScript = savedScript;
adamc@729 782 }
adamc@603 783 }
adamc@603 784
adamc@603 785
adamc@692 786 // Dynamic tree entry points
adamc@692 787
adamc@967 788 function killScript(scr) {
adamc@1260 789 scr.dead = true;
adamc@1260 790 for (var ls = scr.sources; ls; ls = ls.next)
adamc@1260 791 ls.data.dyns = remove(scr, ls.data.dyns);
adamc@1260 792 for (var ls = scr.closures; ls; ls = ls.next)
adamc@1260 793 freeClosure(ls.data);
adamc@967 794 }
adamc@967 795
adam@1538 796 // Sometimes we wind up with tables that contain <script>s outside the single <tbody>.
adam@1538 797 // To avoid dealing with that case, we normalize by moving <script>s into <tbody>.
adam@1538 798 function normalizeTable(table) {
adam@1538 799 var orig = table;
adam@1538 800
adam@1538 801 var script, next;
adam@1538 802
adam@1803 803 while (table && table.tagName != "TABLE")
adam@1538 804 table = table.parentNode;
adam@1538 805
adam@1538 806 for (var tbody = table.firstChild; tbody; tbody = tbody.nextSibling) {
adam@1538 807 if (tbody.tagName == "TBODY") {
adam@1681 808 var firstChild = tbody.firstChild;
adam@1681 809
adam@1538 810 for (script = table.firstChild; script && script != tbody; script = next) {
adam@1538 811 next = script.nextSibling;
adam@1538 812
adam@1681 813 if (firstChild)
adam@1681 814 tbody.insertBefore(script, firstChild);
adam@1681 815 else
adam@1681 816 tbody.appendChild(script);
adam@1538 817 }
adam@1538 818
adam@1538 819 return;
adam@1538 820 }
adam@1538 821 }
adam@1538 822
adam@1538 823 var tbody = document.createElement("tbody");
adam@1538 824 for (script = table.firstChild; script; script = next) {
adam@1538 825 next = script.nextSibling;
rmbruijn@1597 826
adam@1681 827 tbody.appendChild(script);
adam@1538 828 }
adam@1538 829 table.appendChild(tbody);
adam@1538 830 }
adam@1538 831
adam@1803 832 var suspendScripts = false;
adam@1803 833
adamc@901 834 function dyn(pnode, s) {
adam@1803 835 if (suspendScripts)
adam@1803 836 return;
adam@1803 837
adamc@1260 838 var x = document.createElement("script");
adamc@1260 839 x.dead = false;
adamc@1260 840 x.signal = s;
adamc@1260 841 x.sources = null;
adamc@1260 842 x.closures = null;
adamc@899 843
adamc@1260 844 var firstChild = null;
adamc@899 845
adamc@1260 846 x.recreate = function(v) {
adamc@1260 847 for (var ls = x.closures; ls; ls = ls.next)
adamc@1260 848 freeClosure(ls.data);
adamc@945 849
adamc@946 850 var next;
adamc@1260 851 for (var child = firstChild; child && child != x; child = next) {
adamc@1260 852 next = child.nextSibling;
adamc@1260 853
adamc@1260 854 killScript(child);
adamc@1260 855 if (child.getElementsByTagName) {
adamc@1260 856 var arr = child.getElementsByTagName("script");
adamc@1260 857 for (var i = 0; i < arr.length; ++i)
adamc@1260 858 killScript(arr[i]);
adamc@1260 859 }
adamc@1260 860
adamc@1260 861 if (child.parentNode)
adamc@1260 862 child.parentNode.removeChild(child);
adamc@946 863 }
adamc@903 864
adamc@1260 865 var cls = {v : null};
adamc@1260 866 var html = flatten(cls, v);
adamc@1260 867 if (pnode != "table" && pnode != "tr")
adamc@1260 868 html = dynPrefix + html;
adamc@1260 869 x.closures = cls.v;
adamc@946 870
adamc@1260 871 if (pnode == "table") {
adam@1538 872 normalizeTable(x.parentNode);
adam@1538 873
adamc@1260 874 var dummy = document.createElement("body");
adam@1803 875 suspendScripts = true;
adam@1803 876 try {
adam@1803 877 dummy.innerHTML = "<table>" + html + "</table>";
adam@1803 878 } catch (e) {
adam@1803 879 suspendScripts = false;
adam@1803 880 throw e;
adam@1803 881 }
adam@1803 882
adamc@1260 883 var table = x.parentNode;
adamc@1260 884
adamc@1260 885 if (table) {
adamc@1260 886 firstChild = null;
adamc@1260 887 var tbody;
adamc@1260 888
adamc@1260 889 var arr = dummy.getElementsByTagName("tbody");
adamc@1260 890
adamc@1260 891 var tbody;
adamc@1260 892 if (arr.length > 0 && arr[0].parentNode == dummy.firstChild) {
adamc@1260 893 tbody = arr[0];
adamc@1260 894 var next;
adamc@1260 895 for (var node = dummy.firstChild.firstChild; node; node = next) {
adamc@1260 896 next = node.nextSibling;
adamc@1260 897
adamc@1260 898 if (node.tagName != "TBODY")
adamc@1260 899 tbody.appendChild(node);
adamc@1260 900 }
adamc@1260 901 } else
adamc@1260 902 tbody = dummy.firstChild;
adamc@1260 903
adamc@1260 904 var next;
adamc@1260 905 firstChild = document.createElement("script");
adamc@1260 906 table.insertBefore(firstChild, x);
adamc@1260 907 for (var node = tbody.firstChild; node; node = next) {
adamc@1260 908 next = node.nextSibling;
adamc@1260 909 table.insertBefore(node, x);
adam@1803 910 suspendScripts = false;
adam@1803 911 runScripts(node);
adam@1803 912 suspendScripts = true;
adamc@1260 913 }
adamc@1260 914 }
adam@1803 915
adam@1803 916 suspendScripts = false;
adamc@1260 917 } else if (pnode == "tr") {
adamc@1260 918 var dummy = document.createElement("body");
adam@1803 919 suspendScripts = true;
adam@1803 920 try {
adam@1803 921 dummy.innerHTML = "<table><tr>" + html + "</tr></table>";
adam@1803 922 } catch (e) {
adam@1803 923 suspendScripts = false;
adam@1803 924 throw e;
adam@1803 925 }
adam@1803 926
adamc@1260 927 var table = x.parentNode;
adamc@1260 928
adamc@1260 929 if (table) {
adamc@1260 930 var arr = dummy.getElementsByTagName("tr");
adamc@1260 931 firstChild = null;
adamc@1260 932 var tr;
adamc@1260 933 if (arr.length > 0 && table != null)
adamc@1260 934 tr = arr[0];
adamc@1260 935 else
adamc@1260 936 tr = dummy.firstChild;
adamc@1260 937
adamc@1260 938 var next;
adamc@1260 939 firstChild = document.createElement("script");
adamc@1260 940 table.insertBefore(firstChild, x);
adamc@1260 941 for (var node = tr.firstChild; node; node = next) {
adamc@1260 942 next = node.nextSibling;
adamc@1260 943 table.insertBefore(node, x);
adam@1803 944 suspendScripts = false;
adam@1803 945 runScripts(node);
adam@1803 946 suspendScripts = true;
adamc@1260 947 }
adam@1803 948 };
adam@1803 949
adam@1803 950 suspendScripts = false;
adamc@1260 951 } else {
adamc@1260 952 firstChild = document.createElement("span");
adam@1803 953
adam@1803 954 suspendScripts = true;
adam@1803 955 try {
adam@1803 956 firstChild.innerHTML = html;
adam@1803 957 if (x.parentNode)
adam@1803 958 x.parentNode.insertBefore(firstChild, x);
adam@1803 959 } catch (e) {
adam@1803 960 suspendScripts = false;
adam@1803 961 throw e;
adam@1803 962 }
adam@1803 963 suspendScripts = false;
adam@1802 964 runScripts(firstChild);
adamc@903 965 }
adamc@1260 966 };
adamc@899 967
adamc@1260 968 addNode(x);
adamc@1260 969 populate(x);
adamc@571 970 }
adamc@582 971
adam@1702 972 function setInnerHTML(node, html) {
adam@1702 973 var x;
adam@1702 974
adam@1702 975 if (node.previousSibling && node.previousSibling.closures != undefined) {
adam@1702 976 x = node.previousSibling;
adam@1702 977
adam@1702 978 for (var ls = x.closures; ls; ls = ls.next)
adam@1702 979 freeClosure(ls.data);
adam@1702 980
adam@1702 981 if (node.getElementsByTagName) {
adam@1702 982 var arr = node.getElementsByTagName("script");
adam@1702 983 for (var i = 0; i < arr.length; ++i)
adam@1702 984 killScript(arr[i]);
adam@1702 985 }
adam@1702 986 } else {
adam@1702 987 x = document.createElement("script");
adam@1702 988 x.dead = false;
adam@1702 989 x.sources = null;
adam@1702 990
adam@1702 991 if (node.parentNode)
adam@1702 992 node.parentNode.insertBefore(x, node);
adam@1702 993 else
adam@1702 994 whine("setInnerHTML: node is not already in the DOM tree");
adam@1702 995 }
adam@1702 996
adam@1702 997 var cls = {v : null};
adam@1702 998 var html = flatten(cls, html);
adam@1702 999 x.closures = cls.v;
adam@1803 1000 suspendScripts = true;
adam@1702 1001 node.innerHTML = html;
adam@1803 1002 suspendScripts = false;
adam@1702 1003 runScripts(node);
adam@1702 1004 }
adam@1702 1005
adam@1792 1006 var maySuspend = true;
adam@1792 1007
adam@1786 1008 function active(s) {
adam@1803 1009 if (suspendScripts)
adam@1803 1010 return;
adam@1803 1011
adam@1792 1012 var ms = maySuspend;
adam@1792 1013 maySuspend = false;
adam@1792 1014 try {
adam@1792 1015 var html = execF(s);
adam@1792 1016 } catch (e) {
adam@1792 1017 maySuspend = ms;
adam@1792 1018 throw e;
adam@1792 1019 }
adam@1792 1020 maySuspend = ms;
adam@2002 1021 if (html != "") {
adam@2002 1022 var span = document.createElement("span");
adam@2002 1023 addNode(span);
adam@2002 1024 setInnerHTML(span, html);
adam@2002 1025 }
adam@1786 1026 }
adam@1786 1027
adam@1463 1028 function input(x, s, recreate, type, name) {
adam@1463 1029 if (name) x.name = name;
adamc@1260 1030 if (type) x.type = type;
adamc@1260 1031 x.dead = false;
adamc@1260 1032 x.signal = ss(s);
adamc@1260 1033 x.sources = null;
adamc@1260 1034 x.recreate = recreate(x);
adamc@1260 1035 addNode(x);
adamc@1260 1036 populate(x);
adamc@816 1037
adamc@1260 1038 return x;
adamc@816 1039 }
adamc@816 1040
adam@1463 1041 function inp(s, name) {
adam@1803 1042 if (suspendScripts)
adam@1803 1043 return;
adam@1803 1044
adamc@1260 1045 var x = input(document.createElement("input"), s,
adam@1835 1046 function(x) { return function(v) { if (x.value != v) x.value = v; }; }, "text", name);
adamc@1260 1047 x.value = s.data;
adam@1491 1048 x.onkeyup = x.oninput = x.onchange = x.onpropertychange = function() { sv(s, x.value) };
adamc@816 1049
adamc@1260 1050 return x;
adamc@816 1051 }
adamc@816 1052
adam@1479 1053 function selectValue(x) {
adam@1479 1054 if (x.options.length == 0)
adam@1479 1055 return "";
adam@1479 1056 else
adam@1479 1057 return x.options[x.selectedIndex].value;
adam@1479 1058 }
adam@1479 1059
adam@1479 1060 function setSelectValue(x, v) {
adam@1479 1061 for (var i = 0; i < x.options.length; ++i) {
adam@1479 1062 if(x.options[i].value == v) {
adam@1479 1063 x.selectedIndex = i;
adam@1479 1064 return;
adam@1479 1065 }
adam@1479 1066 }
adam@1479 1067 }
adam@1479 1068
adamc@816 1069 function sel(s, content) {
adam@1803 1070 if (suspendScripts)
adam@1803 1071 return;
adam@1803 1072
adamc@1260 1073 var dummy = document.createElement("span");
adamc@1260 1074 dummy.innerHTML = "<select>" + content + "</select>";
adam@1479 1075 var x = input(dummy.firstChild, s, function(x) { return function(v) { if (selectValue(x) != v) setSelectValue(x, v); }; });
adam@1479 1076
adam@1479 1077 for (var i = 0; i < x.options.length; ++i) {
adam@1479 1078 if (x.options[i].value == "")
adam@1479 1079 x.options[i].value = x.options[i].text;
adam@1479 1080 else
adam@1479 1081 x.options[i].value = x.options[i].value.substring(1);
adam@1479 1082 }
adam@1479 1083
adam@1479 1084 setSelectValue(x, s.data);
adam@1479 1085 if (selectValue(x) != s.data)
adam@1479 1086 sv(s, selectValue(x));
adam@1479 1087 x.onchange = function() { sv(s, selectValue(x)) };
adamc@797 1088
adamc@1260 1089 return x;
adamc@598 1090 }
adamc@598 1091
adamc@817 1092 function chk(s) {
adam@1803 1093 if (suspendScripts)
adam@1803 1094 return;
adam@1803 1095
adamc@1260 1096 var x = input(document.createElement("input"), s,
adamc@1260 1097 function(x) { return function(v) { if (x.checked != v) x.checked = v; }; }, "checkbox");
adamc@1260 1098 x.defaultChecked = x.checked = s.data;
adam@1610 1099 x.onclick = x.onkeyup = x.oninput = x.onchange = x.onpropertychange = function() { sv(s, x.checked) };
adamc@817 1100
adamc@1260 1101 return x;
adamc@817 1102 }
adamc@817 1103
adamc@1099 1104 function tbx(s) {
adam@1803 1105 if (suspendScripts)
adam@1803 1106 return;
adam@1803 1107
adamc@1260 1108 var x = input(document.createElement("textarea"), s,
adam@1781 1109 function(x) { return function(v) { if (x.value != v) x.value = v; }; });
adamc@1260 1110 x.innerHTML = s.data;
adam@1491 1111 x.onkeyup = x.oninput = x.onchange = x.onpropertychange = function() { sv(s, x.value) };
adamc@1099 1112
adamc@1260 1113 return x;
adamc@1099 1114 }
adamc@1099 1115
adam@1751 1116 function dynClass(html, s_class, s_style) {
adam@1803 1117 if (suspendScripts)
adam@1803 1118 return;
adam@1803 1119
adam@1643 1120 var htmlCls = {v : null};
adam@1643 1121 html = flatten(htmlCls, html);
adam@1643 1122 htmlCls = htmlCls.v;
adam@1643 1123
adam@1643 1124 var dummy = document.createElement("body");
adam@1803 1125 suspendScripts = true;
adam@1643 1126 dummy.innerHTML = html;
adam@1803 1127 suspendScripts = false;
adam@1643 1128 var html = dummy.firstChild;
adam@1643 1129 dummy.removeChild(html);
adam@1643 1130 addNode(html);
adam@1792 1131 runScripts(html);
adam@1643 1132
adam@1751 1133 if (s_class) {
adam@1751 1134 var x = document.createElement("script");
adam@1751 1135 x.dead = false;
adam@1751 1136 x.signal = s_class;
adam@1751 1137 x.sources = null;
adam@1751 1138 x.closures = htmlCls;
phurst@1986 1139
adam@1751 1140 x.recreate = function(v) {
adam@1751 1141 for (var ls = x.closures; ls != htmlCls; ls = ls.next)
adam@1751 1142 freeClosure(ls.data);
adam@1643 1143
adam@1751 1144 var cls = {v : null};
adam@1751 1145 html.className = flatten(cls, v);
adam@1751 1146 x.closures = concat(cls.v, htmlCls);
adam@1751 1147 }
adam@1643 1148
vshabanoff@1811 1149 html.appendChild(x);
adam@1751 1150 populate(x);
adam@1751 1151 }
adam@1751 1152
adam@1751 1153 if (s_style) {
vshabanoff@1811 1154 var htmlCls2 = s_class ? null : htmlCls;
adam@1751 1155 var x = document.createElement("script");
adam@1751 1156 x.dead = false;
adam@1751 1157 x.signal = s_style;
adam@1751 1158 x.sources = null;
vshabanoff@1811 1159 x.closures = htmlCls2;
phurst@1986 1160
adam@1751 1161 x.recreate = function(v) {
vshabanoff@1811 1162 for (var ls = x.closures; ls != htmlCls2; ls = ls.next)
adam@1751 1163 freeClosure(ls.data);
adam@1751 1164
adam@1751 1165 var cls = {v : null};
adam@1751 1166 html.style.cssText = flatten(cls, v);
vshabanoff@1811 1167 x.closures = concat(cls.v, htmlCls2);
adam@1751 1168 }
adam@1751 1169
vshabanoff@1811 1170 html.appendChild(x);
adam@1751 1171 populate(x);
adam@1751 1172 }
adam@1643 1173 }
adam@1643 1174
adamc@800 1175 function addOnChange(x, f) {
adamc@1260 1176 var old = x.onchange;
adam@1290 1177 if (old == null)
adam@1290 1178 x.onchange = f;
adam@1290 1179 else
adam@1290 1180 x.onchange = function() { old(); f(); };
adam@1290 1181 }
adam@1290 1182
adam@1290 1183 function addOnKeyUp(x, f) {
adam@1290 1184 var old = x.onkeyup;
adam@1290 1185 if (old == null)
adam@1290 1186 x.onkeyup = f;
adam@1290 1187 else
adam@1290 1188 x.onkeyup = function(x) { old(x); f(x); };
adamc@800 1189 }
adamc@800 1190
adamc@692 1191
adamc@692 1192 // Basic string operations
adamc@692 1193
adamc@597 1194 function eh(x) {
adamc@1260 1195 if (x == null)
adamc@1260 1196 return "NULL";
adamc@1260 1197 else
adamc@1260 1198 return x.split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;");
adamc@597 1199 }
adamc@597 1200
adamc@582 1201 function ts(x) { return x.toString() }
adamc@586 1202 function bs(b) { return (b ? "True" : "False") }
adamc@586 1203
adamc@1057 1204 function id(x) { return x; }
adamc@1038 1205 function sub(s, i) { return s.charAt(i); }
adamc@828 1206 function suf(s, i) { return s.substring(i); }
adamc@828 1207 function slen(s) { return s.length; }
adamc@829 1208 function sidx(s, ch) {
adamc@1260 1209 var r = s.indexOf(ch);
adamc@1260 1210 if (r == -1)
adamc@1260 1211 return null;
adamc@1260 1212 else
adamc@1260 1213 return r;
adamc@829 1214 }
adamc@831 1215 function sspn(s, chs) {
adamc@1260 1216 for (var i = 0; i < s.length; ++i)
adamc@1260 1217 if (chs.indexOf(s.charAt(i)) != -1)
adamc@1260 1218 return i;
adamc@831 1219
adam@1793 1220 return s.length;
adamc@831 1221 }
adamc@829 1222 function schr(s, ch) {
adamc@1260 1223 var r = s.indexOf(ch);
adamc@1260 1224 if (r == -1)
adamc@1260 1225 return null;
adamc@1260 1226 else
adamc@1260 1227 return s.substring(r);
adamc@829 1228 }
adamc@829 1229 function ssub(s, start, len) {
adamc@1260 1230 return s.substring(start, start+len);
adamc@829 1231 }
adam@1624 1232 function strlenGe(s, len) {
adam@1624 1233 return s.length >= len;
adam@1624 1234 }
adamc@821 1235
adam@1621 1236 function trimZeroes(s) {
adam@1621 1237 for (var i = 0; i < s.length; ++i)
adam@1632 1238 if (s.charAt(i) != '0') {
adam@1621 1239 if (i > 0)
adam@1621 1240 return s.substring(i);
adam@1621 1241 else
adam@1621 1242 return s;
adam@1621 1243 }
adam@1621 1244
adam@1631 1245 if (s.length == 0)
adam@1621 1246 return s;
adam@1621 1247 else
adam@1631 1248 return "0";
adam@1621 1249 }
adam@1621 1250
adamc@649 1251 function pi(s) {
adam@1631 1252 var st = trimZeroes(s);
adam@1631 1253 var r = parseInt(st);
adam@1631 1254 if (r.toString() == st)
adamc@1260 1255 return r;
adamc@1260 1256 else
adamc@1260 1257 er("Can't parse int: " + s);
adamc@649 1258 }
adamc@649 1259
adamc@649 1260 function pfl(s) {
adamc@1260 1261 var r = parseFloat(s);
adamc@1260 1262 if (r.toString() == s)
adamc@1260 1263 return r;
adamc@1260 1264 else
adamc@1260 1265 er("Can't parse float: " + s);
adamc@649 1266 }
adamc@649 1267
adamc@838 1268 function pio(s) {
adam@1631 1269 var st = trimZeroes(s);
adam@1631 1270 var r = parseInt(st);
adam@1631 1271 if (r.toString() == st)
adamc@1260 1272 return r;
adamc@1260 1273 else
adamc@1260 1274 return null;
adamc@838 1275 }
adamc@838 1276
adamc@838 1277 function pflo(s) {
adamc@1260 1278 var r = parseFloat(s);
adamc@1260 1279 if (r.toString() == s)
adamc@1260 1280 return r;
adamc@1260 1281 else
adamc@1260 1282 return null;
adamc@838 1283 }
adamc@838 1284
adam@1620 1285 function parseSource(s1, s2) {
adam@1620 1286 return eval("s" + s1 + "_" + s2);
adam@1620 1287 }
adam@1620 1288
adamc@692 1289 function uf(s) {
adamc@1260 1290 if (s.length == 0)
adamc@1260 1291 return "_";
vshabanoff@1813 1292 s = s.replace(/\./g, ".2E");
vshabanoff@1813 1293 return (s.charAt(0) == '_' ? "_" : "") + encodeURIComponent(s).replace(/%/g, ".");
adamc@691 1294 }
adamc@691 1295
adamc@692 1296 function uu(s) {
adamc@1260 1297 if (s.length > 0 && s.charAt(0) == '_') {
adamc@1260 1298 s = s.substring(1);
adamc@1260 1299 } else if (s.length >= 3 && (s.charAt(0) == '%' || s.charAt(0) == '.')
adamc@1260 1300 && s.charAt(1) == '5' && (s.charAt(2) == 'f' || s.charAt(2) == 'F'))
adamc@1260 1301 s = s.substring(3);
vshabanoff@1813 1302 s = s.replace(/\+/g, " ");
vshabanoff@1813 1303 s = s.replace(/\./g, "%");
adamc@1260 1304 return decodeURIComponent(s);
adamc@905 1305 }
adamc@905 1306
adamc@1108 1307 function atr(s) {
vshabanoff@1813 1308 return s.replace(/\"/g, "&quot;").replace(/&/g, "&amp;")
vshabanoff@1813 1309 }
adamc@1108 1310
adamc@912 1311 function ub(b) {
adamc@1260 1312 return b ? "1" : "0";
adamc@912 1313 }
adamc@912 1314
adamc@905 1315 function uul(getToken, getData) {
adamc@1260 1316 var tok = getToken();
adamc@1260 1317 if (tok == "Nil") {
adamc@1260 1318 return null;
adamc@1260 1319 } else if (tok == "Cons") {
adamc@1260 1320 var d = getData();
adamc@1260 1321 var l = uul(getToken, getData);
adamc@1260 1322 return {_1:d, _2:l};
adamc@1260 1323 } else
adamc@1260 1324 whine("Can't unmarshal list (" + tok + ")");
adamc@692 1325 }
adamc@692 1326
adamc@961 1327 function strcmp(str1, str2) {
adamc@1260 1328 return ((str1 == str2) ? 0 : ((str1 > str2) ? 1 : -1));
adamc@961 1329 }
adamc@692 1330
adamc@603 1331
adamc@692 1332 // Remote calls
adamc@609 1333
adamc@703 1334 var client_id = null;
adamc@668 1335 var client_pass = 0;
adamc@668 1336 var url_prefix = "/";
adamc@673 1337 var timeout = 60;
adam@1552 1338 var isPost = false;
adamc@668 1339
adamc@668 1340 function getXHR(uri)
adamc@609 1341 {
adamc@609 1342 try {
adamc@1260 1343 return new XMLHttpRequest();
adamc@609 1344 } catch (e) {
adamc@1260 1345 try {
adamc@1260 1346 return new ActiveXObject("Msxml2.XMLHTTP");
adamc@1260 1347 } catch (e) {
adamc@1260 1348 try {
adamc@1260 1349 return new ActiveXObject("Microsoft.XMLHTTP");
adamc@1260 1350 } catch (e) {
adamc@1260 1351 whine("Your browser doesn't seem to support AJAX.");
adamc@1260 1352 }
adamc@1260 1353 }
adamc@609 1354 }
adamc@609 1355 }
adamc@609 1356
adamc@736 1357 var sig = null;
adamc@736 1358
adamc@1042 1359 var unloading = false, inFlight = null;
adamc@1042 1360
adamc@1042 1361 function unload() {
adamc@1260 1362 for (; inFlight; inFlight = inFlight.next) {
adamc@1260 1363 inFlight.data.abort();
adamc@1260 1364 }
adamc@1042 1365 }
adamc@1042 1366
adam@1691 1367 function requestUri(xhr, uri, needsSig, isRpc) {
adam@1691 1368 var extraData = null;
adam@1691 1369
adam@1691 1370 if (isRpc && uri.length > 2000) {
adam@1691 1371 extraData = uri.substring(2000);
adam@1691 1372 uri = uri.substring(0, 2000);
adam@1691 1373 }
adam@1691 1374
vshabanoff@1763 1375 xhr.open("POST", uri, !unloading);
adamc@1260 1376 xhr.setRequestHeader("Content-type", "text/plain");
adamc@668 1377
adamc@1260 1378 if (client_id != null) {
adamc@1260 1379 xhr.setRequestHeader("UrWeb-Client", client_id.toString());
adamc@1260 1380 xhr.setRequestHeader("UrWeb-Pass", client_pass.toString());
adamc@1260 1381 }
adamc@668 1382
adamc@1260 1383 if (needsSig) {
adamc@1260 1384 if (sig == null)
adamc@1260 1385 whine("Missing cookie signature!");
adamc@736 1386
adamc@1260 1387 xhr.setRequestHeader("UrWeb-Sig", sig);
adamc@1260 1388 }
adamc@736 1389
adamc@1260 1390 inFlight = cons(xhr, inFlight);
adam@1691 1391 xhr.send(extraData);
adamc@668 1392 }
adamc@668 1393
adamc@1042 1394 function xhrFinished(xhr) {
adamc@1260 1395 xhr.abort();
adamc@1260 1396 inFlight = remove(xhr, inFlight);
adamc@1042 1397 }
adamc@1042 1398
adamc@1111 1399 function unurlify(parse, s) {
adamc@1260 1400 return parse(s);
adamc@1111 1401 }
adamc@1111 1402
adam@1385 1403 function redirect(s) {
adam@1385 1404 window.location = s;
adam@1385 1405 }
adam@1385 1406
adam@1848 1407 function makeSome(isN, v) {
adam@1848 1408 if (isN)
adam@1848 1409 return {v: v};
adam@1848 1410 else
adam@1848 1411 return v;
adam@1848 1412 }
adam@1848 1413
adam@1848 1414 function rc(prefix, uri, parse, k, needsSig, isN) {
adam@1792 1415 if (!maySuspend)
adam@1794 1416 er("May not 'rpc' in main thread of 'code' for <active>");
adam@1792 1417
adamc@1260 1418 uri = cat(prefix, uri);
adamc@1260 1419 uri = flattenLocal(uri);
adamc@1260 1420 var xhr = getXHR();
adamc@609 1421
adamc@1260 1422 xhr.onreadystatechange = function() {
adamc@1260 1423 if (xhr.readyState == 4) {
adamc@1260 1424 var isok = false;
adamc@612 1425
adamc@1260 1426 try {
adamc@1260 1427 if (xhr.status == 200)
adamc@1260 1428 isok = true;
adamc@1260 1429 } catch (e) { }
adamc@612 1430
adamc@1260 1431 if (isok) {
adam@1446 1432 var lines = xhr.responseText.split("\n");
adam@1848 1433 if (lines.length != 2) {
adam@1848 1434 if (isN == null)
adam@1848 1435 whine("Bad RPC response lines");
adam@1848 1436 else
adam@1848 1437 k(null);
adam@1848 1438 } else {
adam@1848 1439 eval(lines[0]);
adam@1446 1440
adam@1848 1441 try {
adam@1848 1442 var v = parse(lines[1]);
adam@1848 1443 try {
adam@1848 1444 k(makeSome(isN, v));
adam@1848 1445 } catch (v) {
adam@1848 1446 doExn(v);
adam@1848 1447 }
adam@1848 1448 } catch (v) {
adam@1848 1449 k(null);
adam@1848 1450 }
adamc@1260 1451 }
adamc@1260 1452 } else {
adam@1848 1453 if (isN == null)
adam@1848 1454 conn();
adam@1848 1455 else
adam@1848 1456 k(null);
adamc@1260 1457 }
adamc@1260 1458
adamc@1260 1459 xhrFinished(xhr);
adamc@729 1460 }
adamc@1260 1461 };
adamc@1042 1462
adam@1691 1463 requestUri(xhr, uri, needsSig, true);
adamc@609 1464 }
adamc@667 1465
adamc@667 1466 function path_join(s1, s2) {
adamc@1260 1467 if (s1.length > 0 && s1.charAt(s1.length-1) == '/')
adamc@1260 1468 return s1 + s2;
adamc@1260 1469 else
adamc@1260 1470 return s1 + "/" + s2;
adamc@667 1471 }
adamc@667 1472
adamc@670 1473 var channels = [];
adamc@670 1474
adamc@670 1475 function newQueue() {
adamc@1260 1476 return { front : null, back : null };
adamc@670 1477 }
adamc@670 1478 function enqueue(q, v) {
adamc@1260 1479 if (q.front == null) {
adamc@1260 1480 q.front = cons(v, null);
adamc@1260 1481 q.back = q.front;
adamc@1260 1482 } else {
adamc@1260 1483 var node = cons(v, null);
adamc@1260 1484 q.back.next = node;
adamc@1260 1485 q.back = node;
adamc@1260 1486 }
adamc@670 1487 }
adamc@670 1488 function dequeue(q) {
adamc@670 1489 if (q.front == null)
adamc@1260 1490 return null;
adamc@1260 1491 else {
adamc@1260 1492 var r = q.front.data;
adamc@1260 1493 q.front = q.front.next;
adamc@1260 1494 if (q.front == null)
adamc@1260 1495 q.back = null;
adamc@1260 1496 return r;
adamc@1260 1497 }
adamc@670 1498 }
adamc@670 1499
adamc@670 1500 function newChannel() {
adamc@1260 1501 return { msgs : newQueue(), listeners : newQueue() };
adamc@670 1502 }
adamc@670 1503
adamc@667 1504 function listener() {
adamc@1260 1505 var uri = path_join(url_prefix, ".msgs");
adamc@1260 1506 var xhr = getXHR();
adamc@1260 1507 var tid, orsc, onTimeout;
adamc@673 1508
adamc@1260 1509 var connect = function () {
adamc@1260 1510 xhr.onreadystatechange = orsc;
adamc@1260 1511 tid = window.setTimeout(onTimeout, timeout * 500);
adam@1691 1512 requestUri(xhr, uri, false, false);
adamc@1260 1513 }
adamc@673 1514
adamc@1260 1515 orsc = function() {
adamc@1260 1516 if (xhr.readyState == 4) {
adamc@1260 1517 window.clearTimeout(tid);
adamc@673 1518
adamc@1260 1519 var isok = false;
adamc@667 1520
adamc@1260 1521 try {
adamc@1260 1522 if (xhr.status == 200)
adamc@1260 1523 isok = true;
adamc@1260 1524 } catch (e) { }
adamc@667 1525
adamc@1260 1526 if (isok) {
adam@1447 1527 var text = xhr.responseText;
adamc@1260 1528 if (text == "")
adamc@1260 1529 return;
adamc@1260 1530 var lines = text.split("\n");
adamc@889 1531
adam@1552 1532 if (lines.length == 1 && lines[0] == "R") {
adam@1553 1533 lameDuck = true;
adam@1553 1534
adam@1552 1535 if (isPost)
adam@1552 1536 history.back();
adam@1552 1537 else
adam@1552 1538 location.reload();
adam@1552 1539
adam@1552 1540 return;
adam@1552 1541 }
adam@1552 1542
adamc@1260 1543 if (lines.length < 2) {
adamc@1260 1544 discon();
adamc@1260 1545 return;
adamc@1260 1546 }
adamc@1260 1547
adam@1447 1548 var messageReader = function(i) {
adam@1447 1549 if (i+1 >= lines.length) {
adam@1447 1550 xhrFinished(xhr);
adam@1447 1551 connect();
adam@1447 1552 }
adam@1447 1553 else {
adam@1447 1554 var chn = lines[i];
adam@1447 1555 var msg = lines[i+1];
adamc@1260 1556
adam@1447 1557 if (chn == "E") {
adam@1447 1558 eval(msg);
adam@1447 1559 window.setTimeout(function() { messageReader(i+2); }, 0);
adam@1447 1560 } else {
adam@1447 1561 if (chn < 0)
adam@1447 1562 whine("Out-of-bounds channel in message from remote server");
adamc@1260 1563
adam@1447 1564 var ch;
adamc@1260 1565
adam@1447 1566 if (chn >= channels.length || channels[chn] == null) {
adam@1447 1567 ch = newChannel();
adam@1447 1568 channels[chn] = ch;
adam@1447 1569 } else
adam@1447 1570 ch = channels[chn];
adamc@1260 1571
adam@1447 1572 var listener = dequeue(ch.listeners);
adam@1447 1573 if (listener == null) {
adam@1447 1574 enqueue(ch.msgs, msg);
adam@1447 1575 } else {
adam@1447 1576 try {
adam@1447 1577 listener(msg);
adam@1447 1578 } catch (v) {
adam@1447 1579 doExn(v);
adam@1447 1580 }
adam@1447 1581 }
adam@1447 1582
adam@1447 1583 messageReader(i+2);
adamc@1260 1584 }
adamc@1260 1585 }
adamc@1260 1586 }
adamc@1260 1587
adam@1447 1588 messageReader(0);
adamc@1260 1589 }
adamc@1260 1590 else {
adamc@1260 1591 try {
adamc@1260 1592 if (xhr.status != 0)
adamc@1260 1593 servErr("Error querying remote server for messages: " + xhr.status);
adamc@1260 1594 } catch (e) { }
adamc@1260 1595 }
adamc@729 1596 }
adamc@1260 1597 };
adamc@669 1598
adamc@1260 1599 onTimeout = function() {
adamc@1260 1600 xhrFinished(xhr);
adamc@1260 1601 connect();
adamc@1260 1602 };
adamc@670 1603
adamc@673 1604 connect();
adamc@667 1605 }
adamc@670 1606
adamc@670 1607 function rv(chn, parse, k) {
adam@1792 1608 if (!maySuspend)
adam@1794 1609 er("May not 'recv' in main thread of 'code' for <active>");
adam@1792 1610
adamc@1260 1611 if (chn == null)
adam@1942 1612 er("Client-side code tried to recv() from a channel belonging to a different page view.");
adamc@682 1613
adamc@1260 1614 if (chn < 0)
adamc@1260 1615 whine("Out-of-bounds channel receive");
adamc@670 1616
adamc@1260 1617 var ch;
adamc@670 1618
adamc@1260 1619 if (chn >= channels.length || channels[chn] == null) {
adamc@1260 1620 ch = newChannel();
adamc@1260 1621 channels[chn] = ch;
adamc@1260 1622 } else
adamc@1260 1623 ch = channels[chn];
adamc@670 1624
adamc@1260 1625 var msg = dequeue(ch.msgs);
adamc@1260 1626 if (msg == null) {
adamc@1260 1627 enqueue(ch.listeners, function(msg) { k(parse(msg)); });
adamc@1260 1628 } else {
adamc@1260 1629 try {
adamc@1260 1630 k(parse(msg));
adamc@1260 1631 } catch (v) {
adamc@1260 1632 doExn(v);
adamc@1260 1633 }
adamc@728 1634 }
adamc@670 1635 }
adamc@693 1636
adamc@978 1637 function sl(ms, k) {
adam@1792 1638 if (!maySuspend)
adam@1794 1639 er("May not 'sleep' in main thread of 'code' for <active>");
adam@1792 1640
adamc@1260 1641 window.setTimeout(function() { k(null); }, ms);
adamc@1021 1642 }
adamc@1021 1643
adamc@1021 1644 function sp(e) {
adam@1794 1645 window.setTimeout(function() { execF(e); }, 0);
adamc@978 1646 }
adamc@978 1647
adamc@693 1648
adamc@970 1649 // The Ur interpreter
adamc@970 1650
adamc@970 1651 var urfuncs = [];
adamc@970 1652
adamc@970 1653 function lookup(env, n) {
adamc@1260 1654 while (env != null) {
adamc@1260 1655 if (n == 0)
adamc@1260 1656 return env.data;
adamc@1260 1657 else {
adamc@1260 1658 --n;
adamc@1260 1659 env = env.next;
adamc@1260 1660 }
adamc@970 1661 }
adamc@970 1662
adamc@1260 1663 whine("Out-of-bounds Ur variable reference");
adamc@970 1664 }
adamc@970 1665
adamc@974 1666 function execP(env, p, v) {
adamc@1260 1667 switch (p.c) {
adamc@1260 1668 case "w":
adamc@1260 1669 return env;
adamc@1260 1670 case "v":
adamc@1260 1671 return cons(v, env);
adamc@1260 1672 case "c":
adamc@1260 1673 if (v == p.v)
adamc@1260 1674 return env;
adamc@1260 1675 else
adamc@1260 1676 return false;
adamc@1260 1677 case "s":
adamc@1260 1678 if (v == null)
adamc@1260 1679 return false;
adamc@1260 1680 else
adamc@1260 1681 return execP(env, p.p, p.n ? v.v : v);
adamc@1260 1682 case "1":
adamc@1260 1683 if (v.n != p.n)
adamc@1260 1684 return false;
adamc@1260 1685 else
adamc@1260 1686 return execP(env, p.p, v.v);
adamc@1260 1687 case "r":
adamc@1260 1688 for (var fs = p.l; fs != null; fs = fs.next) {
adamc@1260 1689 env = execP(env, fs.data.p, v["_" + fs.data.n]);
adamc@1260 1690 if (env == false)
adamc@1260 1691 return false;
adamc@1260 1692 }
adamc@1260 1693 return env;
adamc@1260 1694 default:
adamc@1260 1695 whine("Unknown Ur pattern kind" + p.c);
adamc@974 1696 }
adamc@974 1697 }
adamc@974 1698
adamc@970 1699 function exec0(env, e) {
adamc@1260 1700 return exec1(env, null, e);
adamc@1020 1701 }
adamc@1020 1702
adamc@1020 1703 function exec1(env, stack, e) {
adamc@1260 1704 var stack, usedK = false;
adamc@970 1705
adamc@1260 1706 var saveEnv = function() {
adamc@1260 1707 if (stack.next != null && stack.next.data.c != "<")
adamc@1260 1708 stack = cons({c: "<", env: env}, stack.next);
adamc@1260 1709 else
adamc@1260 1710 stack = stack.next;
adamc@1260 1711 };
adamc@983 1712
adamc@1260 1713 while (true) {
adamc@1260 1714 switch (e.c) {
adamc@1260 1715 case "c":
adamc@1260 1716 var v = e.v;
adamc@1260 1717 if (stack == null)
adamc@1260 1718 return v;
adamc@1260 1719 var fr = stack.data;
adamc@970 1720
adamc@1260 1721 switch (fr.c) {
adamc@1260 1722 case "s":
adamc@1260 1723 e = {c: "c", v: {v: v}};
adamc@1260 1724 stack = stack.next;
adamc@1260 1725 break;
adamc@1260 1726 case "1":
adamc@1260 1727 e = {c: "c", v: {n: fr.n, v: v}};
adamc@1260 1728 stack = stack.next;
adamc@1260 1729 break;
adamc@1260 1730 case "f":
adamc@1260 1731 fr.args[fr.pos++] = v;
adamc@1260 1732 if (fr.a == null) {
adamc@1260 1733 var res;
adamc@1260 1734 stack = stack.next;
adamc@1035 1735
adamc@1260 1736 if (fr.f.apply)
adamc@1260 1737 res = fr.f.apply(null, fr.args);
adamc@1260 1738 else if (fr.args.length == 0)
adamc@1260 1739 res = fr.f();
adamc@1260 1740 else if (fr.args.length == 1)
adamc@1260 1741 res = fr.f(fr.args[0]);
adamc@1260 1742 else if (fr.args.length == 2)
adamc@1260 1743 res = fr.f(fr.args[0], fr.args[1]);
adamc@1260 1744 else if (fr.args.length == 3)
adamc@1260 1745 res = fr.f(fr.args[0], fr.args[1], fr.args[2]);
adamc@1260 1746 else if (fr.args.length == 4)
adamc@1260 1747 res = fr.f(fr.args[0], fr.args[1], fr.args[2], fr.args[3]);
adamc@1260 1748 else if (fr.args.length == 5)
adamc@1260 1749 res = fr.f(fr.args[0], fr.args[1], fr.args[2], fr.args[3], fr.args[4]);
adamc@1260 1750 else
adamc@1260 1751 whine("Native function has " + fr.args.length + " args, but there is no special case for that count.");
adamc@1035 1752
adamc@1260 1753 e = {c: "c", v: res};
adamc@1260 1754 if (usedK) return null;
adamc@1260 1755 } else {
adamc@1260 1756 e = fr.a.data;
adamc@1260 1757 fr.a = fr.a.next;
adamc@1260 1758 }
adamc@1260 1759 break;
adamc@1260 1760 case "a1":
adamc@1260 1761 e = fr.x;
adamc@1260 1762 stack = cons({c: "a2", f: v}, stack.next);
adamc@1260 1763 break;
adamc@1260 1764 case "a2":
adamc@1260 1765 if (fr.f == null)
adamc@1260 1766 whine("Ur: applying null function");
adamc@1260 1767 else if (fr.f.body) {
adamc@1260 1768 saveEnv();
adamc@1260 1769 env = cons(v, fr.f.env);
adamc@1260 1770 e = fr.f.body;
adamc@1260 1771 } else {
adamc@1260 1772 e = {c: "c", v: fr.f(v)};
adamc@1260 1773 stack = stack.next;
adamc@1260 1774 }
adamc@1260 1775 break;
adamc@1260 1776 case "<":
adamc@1260 1777 env = fr.env;
adamc@1260 1778 stack = stack.next;
adamc@1260 1779 break;
adamc@1260 1780 case "r":
adamc@1260 1781 fr.fs["_" + fr.n] = v;
adamc@1260 1782 if (fr.l == null) {
adamc@1260 1783 e = {c: "c", v: fr.fs};
adamc@1260 1784 stack = stack.next;
adamc@1260 1785 } else {
adamc@1260 1786 fr.n = fr.l.data.n;
adamc@1260 1787 e = fr.l.data.v;
adamc@1260 1788 fr.l = fr.l.next;
adamc@1260 1789 }
adamc@1260 1790 break;
adamc@1260 1791 case ".":
adamc@1260 1792 e = {c: "c", v: v["_" + fr.f]};
adamc@1260 1793 stack = stack.next;
adamc@1260 1794 break;
adamc@1260 1795 case ";":
adamc@1260 1796 e = fr.e2;
adamc@1260 1797 stack = stack.next;
adamc@1260 1798 break;
adamc@1260 1799 case "=":
adamc@1260 1800 saveEnv();
adamc@1260 1801 env = cons(v, env);
adamc@1260 1802 e = fr.e2;
adamc@1260 1803 break;
adamc@1260 1804 case "m":
adamc@1260 1805 var ps;
adamc@1260 1806 for (ps = fr.p; ps != null; ps = ps.next) {
adamc@1260 1807 var r = execP(env, ps.data.p, v);
adamc@1260 1808 if (r != false) {
adamc@1260 1809 saveEnv();
adamc@1260 1810 env = r;
adamc@1260 1811 e = ps.data.b;
adamc@1260 1812 break;
adamc@1260 1813 }
adamc@1260 1814 }
adamc@1260 1815 if (ps == null)
adamc@1260 1816 whine("Match failure in Ur interpretation");
adamc@1260 1817 break;
adamc@1260 1818 default:
adamc@1260 1819 whine("Unknown Ur continuation kind " + fr.c);
adamc@1260 1820 }
adamc@1260 1821
adamc@1260 1822 break;
adamc@1260 1823 case "v":
adamc@1260 1824 e = {c: "c", v: lookup(env, e.n)};
adamc@1260 1825 break;
adamc@1260 1826 case "n":
adamc@1260 1827 var idx = e.n;
adamc@1260 1828 e = urfuncs[idx];
adamc@1260 1829 if (e.c == "t")
adamc@1262 1830 e = urfuncs[idx] = eval("(" + e.f + ")");
adamc@1260 1831 break;
adamc@1260 1832 case "s":
adamc@1260 1833 stack = cons({c: "s"}, stack);
adamc@1260 1834 e = e.v;
adamc@1260 1835 break;
adamc@1260 1836 case "1":
adamc@1260 1837 stack = cons({c: "1", n: e.n}, stack);
adamc@1260 1838 e = e.v;
adamc@1260 1839 break;
adamc@1260 1840 case "f":
adamc@1260 1841 if (e.a == null)
adam@1798 1842 e = {c: "c", v: e.f()};
adamc@1260 1843 else {
adamc@1260 1844 var args = [];
adam@1798 1845 stack = cons({c: "f", f: e.f, args: args, pos: 0, a: e.a.next}, stack);
adamc@1260 1846 if (!e.a.data.c) alert("[2] fr.f = " + e.f + "; 0 = " + e.a.data);
adamc@1260 1847 e = e.a.data;
adamc@1260 1848 }
adamc@1260 1849 break;
adamc@1260 1850 case "l":
adamc@1260 1851 e = {c: "c", v: {env: env, body: e.b}};
adamc@1260 1852 break;
adamc@1260 1853 case "a":
adamc@1260 1854 stack = cons({c: "a1", x: e.x}, stack);
adamc@1260 1855 e = e.f;
adamc@1260 1856 break;
adamc@1260 1857 case "r":
adamc@1260 1858 if (e.l == null)
adamc@1260 1859 whine("Empty Ur record in interpretation");
adamc@1260 1860 var fs = {};
adamc@1260 1861 stack = cons({c: "r", n: e.l.data.n, fs: fs, l: e.l.next}, stack);
adamc@1260 1862 e = e.l.data.v;
adamc@1260 1863 break;
adamc@1260 1864 case ".":
adamc@1260 1865 stack = cons({c: ".", f: e.f}, stack);
adamc@1260 1866 e = e.r;
adamc@1260 1867 break;
adamc@1260 1868 case ";":
adamc@1260 1869 stack = cons({c: ";", e2: e.e2}, stack);
adamc@1260 1870 e = e.e1;
adamc@1260 1871 break;
adamc@1260 1872 case "=":
adamc@1260 1873 stack = cons({c: "=", e2: e.e2}, stack);
adamc@1260 1874 e = e.e1;
adamc@1260 1875 break;
adamc@1260 1876 case "m":
adamc@1260 1877 stack = cons({c: "m", p: e.p}, stack);
adamc@1260 1878 e = e.e;
adamc@1260 1879 break;
adamc@1260 1880 case "e":
adamc@1260 1881 e = {c: "c", v: cs({c: "wc", env: env, body: e.e})};
adamc@1260 1882 break;
adamc@1260 1883 case "wc":
adamc@1260 1884 env = e.env;
adamc@1260 1885 e = e.body;
adamc@1260 1886 break;
adamc@1260 1887 case "K":
adamc@1260 1888 { var savedStack = stack.next, savedEnv = env;
adamc@1260 1889 e = {c: "c", v: function(v) { return exec1(savedEnv, savedStack, {c: "c", v: v}); } };}
adamc@1260 1890 usedK = true;
rmbruijn@1597 1891 break;
adamc@1260 1892 default:
adamc@1260 1893 whine("Unknown Ur expression kind " + e.c);
adamc@970 1894 }
adamc@970 1895 }
adamc@970 1896 }
adamc@970 1897
adamc@976 1898 function execD(e) {
adamc@1260 1899 return exec0(null, e);
adamc@976 1900 }
adamc@976 1901
adamc@970 1902 function exec(e) {
adamc@1260 1903 var r = exec0(null, e);
adamc@970 1904
adamc@1260 1905 if (r != null && r.body != null)
adamc@1260 1906 return function(v) { return exec0(cons(v, r.env), r.body); };
adamc@1260 1907 else
adamc@1260 1908 return r;
adamc@895 1909 }
adamc@895 1910
adamc@977 1911 function execF(f, x) {
adamc@1260 1912 return exec0(cons(x, f.env), f.body);
adamc@977 1913 }
adamc@977 1914
adamc@895 1915
adam@1290 1916 // Wrappers
adam@1290 1917
adam@1290 1918 function confrm(s) {
adam@1290 1919 return confirm(s) ? true : false;
adam@1290 1920 }
adam@1290 1921
adam@1290 1922
adamc@1323 1923 // URL blessing
adamc@1323 1924
adamc@1323 1925 var urlRules = null;
adamc@1323 1926
adamc@1323 1927 function checkUrl(s) {
adamc@1323 1928 for (var r = urlRules; r; r = r.next) {
adamc@1323 1929 var ru = r.data;
adamc@1323 1930 if (ru.prefix ? s.indexOf(ru.pattern) == 0 : s == ru.pattern)
adamc@1323 1931 return ru.allow ? s : null;
adamc@1323 1932 }
adamc@1323 1933
adamc@1323 1934 return null;
adamc@1323 1935 }
adamc@1323 1936
adamc@1323 1937 function bless(s) {
adamc@1323 1938 u = checkUrl(s);
adamc@1323 1939 if (u == null)
adamc@1323 1940 er("Disallowed URL: " + s);
adamc@1323 1941 return u;
adamc@1323 1942 }
adamc@1323 1943
adam@1556 1944
adam@2008 1945 // Attribute name blessing
adam@2008 1946
adam@2008 1947 function blessData(s) {
adam@2008 1948 for (var i = 0; i < s.length; ++i) {
adam@2008 1949 var c = s[i];
adam@2008 1950 if (!isAlnum(c) && c != '-' && c != '_')
adam@2008 1951 er("Disallowed character in data-* attribute name");
adam@2008 1952 }
adam@2008 1953
adam@2008 1954 return s;
adam@2008 1955 }
adam@2008 1956
adam@2008 1957
adam@1755 1958 // CSS validation
adam@1755 1959
adam@1755 1960 function atom(s) {
adam@1755 1961 for (var i = 0; i < s.length; ++i) {
adam@1755 1962 var c = s[i];
adam@1755 1963 if (!isAlnum(c) && c != '+' && c != '-' && c != '.' && c != '%' && c != '#')
adam@1755 1964 er("Disallowed character in CSS atom");
adam@1755 1965 }
adam@1755 1966
adam@1755 1967 return s;
adam@1755 1968 }
adam@1755 1969
adam@1755 1970 function css_url(s) {
adam@1755 1971 for (var i = 0; i < s.length; ++i) {
adam@1755 1972 var c = s[i];
adam@1755 1973 if (!isAlnum(c) && c != ':' && c != '/' && c != '.' && c != '_' && c != '+'
adam@1755 1974 && c != '-' && c != '%' && c != '?' && c != '&' && c != '=' && c != '#')
adam@1755 1975 er("Disallowed character in CSS URL");
adam@1755 1976 }
adam@1755 1977
adam@1755 1978 return s;
adam@1755 1979 }
adam@1755 1980
adam@1755 1981 function property(s) {
adam@1755 1982 if (s.length <= 0)
adam@1755 1983 er("Empty CSS property");
adam@1755 1984
adam@1755 1985 if (!isLower(s[0]) && s[0] != '_')
adam@1755 1986 er("Bad initial character in CSS property");
adam@1755 1987
adam@1755 1988 for (var i = 0; i < s.length; ++i) {
adam@1755 1989 var c = s[i];
adam@1755 1990 if (!isLower(c) && !isDigit(c) && c != '_' && c != '-')
adam@1755 1991 er("Disallowed character in CSS property");
adam@1755 1992 }
adam@1755 1993
adam@1755 1994 return s;
adam@1755 1995 }
adam@1755 1996
adam@1755 1997
adam@1556 1998 // ID generation
adam@1556 1999
adam@1556 2000 var nextId = 0;
adam@1556 2001
adam@1556 2002 function fresh() {
adam@1703 2003 return "uw" + (--nextId);
adam@1556 2004 }
adam@1556 2005
adam@1785 2006 function giveFocus(id) {
adam@1803 2007 var node = document.getElementById(id);
adam@1785 2008
adam@1803 2009 if (node)
adam@1803 2010 node.focus();
adam@1803 2011 else
adam@1803 2012 er("Tried to give focus to ID not used in document: " + id);
adam@1785 2013 }
adam@1785 2014
rmbruijn@1597 2015
adamc@693 2016 // App-specific code