git.sesse.net Git - remoteglot/blob - www/js/remoteglot.js

   1 (function() {
   2
   3 var board = null;
   4 var hiddenboard = null;
   5 var arrows = [];
   6 var occupied_by_arrows = [];
   7 var refutation_lines = [];
   8 var move_num = 1;
   9 var toplay = 'W';
  10 var ims = 0;
  11 var sort_refutation_lines_by_score = 0;
  12 var highlight_from = undefined;
  13 var highlight_to = undefined;
  14 var unique = Math.random();
  15
  16 var fen = null;
  17 var display_lines = [];
  18 var current_display_line = null;
  19 var current_display_move = null;
  20
  21 var request_update = function() {
  22         $.ajax({
  23                 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
  24                 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
  25         }).done(function(data, textstatus, xhr) {
  26                 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
  27                 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
  28                 update_board(data, num_viewers);
  29         }).fail(function() {
  30                 // Wait ten seconds, then try again.
  31                 setTimeout(function() { request_update(); }, 10000);
  32         });
  33 }
  34
  35 var clear_arrows = function() {
  36         for (var i = 0; i < arrows.length; ++i) {
  37                 if (arrows[i].svg) {
  38                         arrows[i].svg.parentElement.removeChild(arrows[i].svg);
  39                         delete arrows[i].svg;
  40                 }
  41         }
  42         arrows = [];
  43
  44         occupied_by_arrows = [];
  45         for (var y = 0; y < 8; ++y) {
  46                 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
  47         }
  48 }
  49
  50 var redraw_arrows = function() {
  51         for (var i = 0; i < arrows.length; ++i) {
  52                 position_arrow(arrows[i]);
  53         }
  54 }
  55
  56 var sign = function(x) {
  57         if (x > 0) {
  58                 return 1;
  59         } else if (x < 0) {
  60                 return -1;
  61         } else {
  62                 return 0;
  63         }
  64 }
  65
  66 // See if drawing this arrow on the board would cause unduly amount of confusion.
  67 var interfering_arrow = function(from, to) {
  68         var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
  69         var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
  70         var to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
  71         var to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
  72
  73         occupied_by_arrows[from_row][from_col] = true;
  74
  75         // Knight move: Just check that we haven't been at the destination before.
  76         if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
  77             (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
  78                 return occupied_by_arrows[to_row][to_col];
  79         }
  80
  81         // Sliding piece: Check if anything except the from-square is seen before.
  82         var dx = sign(to_col - from_col);
  83         var dy = sign(to_row - from_row);
  84         var x = from_col;
  85         var y = from_row;
  86         do {
  87                 x += dx;
  88                 y += dy;
  89                 if (occupied_by_arrows[y][x]) {
  90                         return true;
  91                 }
  92                 occupied_by_arrows[y][x] = true;
  93         } while (x != to_col || y != to_row);
  94
  95         return false;
  96 }
  97
  98 var point_from_start = function(x1, y1, x2, y2, t, u) {
  99         var dx = x2 - x1;
 100         var dy = y2 - y1;
 101
 102         var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 103         dx *= norm;
 104         dy *= norm;
 105
 106         var x = x1 + dx * t + dy * u;
 107         var y = y1 + dy * t - dx * u;
 108         return x + " " + y;
 109 }
 110
 111 var point_from_end = function(x1, y1, x2, y2, t, u) {
 112         var dx = x2 - x1;
 113         var dy = y2 - y1;
 114
 115         var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 116         dx *= norm;
 117         dy *= norm;
 118
 119         var x = x2 + dx * t + dy * u;
 120         var y = y2 + dy * t - dx * u;
 121         return x + " " + y;
 122 }
 123
 124 var position_arrow = function(arrow) {
 125         if (arrow.svg) {
 126                 arrow.svg.parentElement.removeChild(arrow.svg);
 127                 delete arrow.svg;
 128         }
 129         if (current_display_line !== null) {
 130                 return;
 131         }
 132
 133         var pos = $(".square-a8").position();
 134
 135         var zoom_factor = $("#board").width() / 400.0;
 136         var line_width = arrow.line_width * zoom_factor;
 137         var arrow_size = arrow.arrow_size * zoom_factor;
 138
 139         var square_width = $(".square-a8").width();
 140         var from_y = (7 - arrow.from_row + 0.5)*square_width;
 141         var to_y = (7 - arrow.to_row + 0.5)*square_width;
 142         var from_x = (arrow.from_col + 0.5)*square_width;
 143         var to_x = (arrow.to_col + 0.5)*square_width;
 144
 145         var SVG_NS = "http://www.w3.org/2000/svg";
 146         var XHTML_NS = "http://www.w3.org/1999/xhtml";
 147         var svg = document.createElementNS(SVG_NS, "svg");
 148         svg.setAttribute("width", $("#board").width());
 149         svg.setAttribute("height", $("#board").height());
 150         svg.setAttribute("style", "position: absolute");
 151         svg.setAttribute("position", "absolute");
 152         svg.setAttribute("version", "1.1");
 153         svg.setAttribute("class", "c1");
 154         svg.setAttribute("xmlns", XHTML_NS);
 155
 156         var x1 = from_x;
 157         var y1 = from_y;
 158         var x2 = to_x;
 159         var y2 = to_y;
 160
 161         // Draw the line.
 162         var outline = document.createElementNS(SVG_NS, "path");
 163         outline.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
 164         outline.setAttribute("xmlns", XHTML_NS);
 165         outline.setAttribute("stroke", "#666");
 166         outline.setAttribute("stroke-width", line_width + 2);
 167         outline.setAttribute("fill", "none");
 168         svg.appendChild(outline);
 169
 170         var path = document.createElementNS(SVG_NS, "path");
 171         path.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
 172         path.setAttribute("xmlns", XHTML_NS);
 173         path.setAttribute("stroke", arrow.fg_color);
 174         path.setAttribute("stroke-width", line_width);
 175         path.setAttribute("fill", "none");
 176         svg.appendChild(path);
 177
 178         // Then the arrow head.
 179         var head = document.createElementNS(SVG_NS, "path");
 180         head.setAttribute("d",
 181                 "M " +  point_from_end(x1, y1, x2, y2, 0, 0) +
 182                 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
 183                 " L " + point_from_end(x1, y1, x2, y2, -arrow_size * .623, 0.0) +
 184                 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, arrow_size / 2) +
 185                 " L " + point_from_end(x1, y1, x2, y2, 0, 0));
 186         head.setAttribute("xmlns", XHTML_NS);
 187         head.setAttribute("stroke", "#000");
 188         head.setAttribute("stroke-width", "1");
 189         head.setAttribute("fill", "#f66");
 190         svg.appendChild(head);
 191
 192         $(svg).css({ top: pos.top, left: pos.left });
 193         document.body.appendChild(svg);
 194         arrow.svg = svg;
 195 }
 196
 197 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
 198         var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
 199         var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
 200         var to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
 201         var to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
 202
 203         // Create arrow.
 204         var arrow = {
 205                 from_col: from_col,
 206                 from_row: from_row,
 207                 to_col: to_col,
 208                 to_row: to_row,
 209                 line_width: line_width,
 210                 arrow_size: arrow_size,
 211                 fg_color: fg_color
 212         };
 213
 214         position_arrow(arrow);
 215         arrows.push(arrow);
 216 }
 217
 218 var compare_by_sort_key = function(refutation_lines, a, b) {
 219         var ska = refutation_lines[a]['sort_key'];
 220         var skb = refutation_lines[b]['sort_key'];
 221         if (ska < skb) return -1;
 222         if (ska > skb) return 1;
 223         return 0;
 224 };
 225
 226 var compare_by_score = function(refutation_lines, a, b) {
 227         var sa = parseInt(refutation_lines[b]['score_sort_key'], 10);
 228         var sb = parseInt(refutation_lines[a]['score_sort_key'], 10);
 229         return sa - sb;
 230 }
 231
 232 // Fake multi-PV using the refutation lines. Find all “relevant” moves,
 233 // sorted by quality, descending.
 234 var find_nonstupid_moves = function(data, margin) {
 235         // First of all, if there are any moves that are more than 0.5 ahead of
 236         // the primary move, the refutation lines are probably bunk, so just
 237         // kill them all.
 238         var best_score = undefined;
 239         var pv_score = undefined;
 240         for (var move in data['refutation_lines']) {
 241                 var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
 242                 if (move == data['pv_uci'][0]) {
 243                         pv_score = score;
 244                 }
 245                 if (best_score === undefined || score > best_score) {
 246                         best_score = score;
 247                 }
 248                 if (!(data['refutation_lines'][move]['depth'] >= 8)) {
 249                         return [];
 250                 }
 251         }
 252
 253         if (best_score - pv_score > 50) {
 254                 return [];
 255         }
 256
 257         // Now find all moves that are within “margin” of the best score.
 258         // The PV move will always be first.
 259         var moves = [];
 260         for (var move in data['refutation_lines']) {
 261                 var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
 262                 if (move != data['pv_uci'][0] && best_score - score <= margin) {
 263                         moves.push(move);
 264                 }
 265         }
 266         moves = moves.sort(function(a, b) { return compare_by_score(data['refutation_lines'], a, b) });
 267         moves.unshift(data['pv_uci'][0]);
 268
 269         return moves;
 270 }
 271
 272 var thousands = function(x) {
 273         return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
 274 }
 275
 276 var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
 277         display_lines.push({
 278                 start_fen: fen,
 279                 uci_pv: uci_pv,
 280                 pretty_pv: pretty_pv
 281         });
 282
 283         var pv = '';
 284         var i = 0;
 285         if (toplay == 'B') {
 286                 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
 287                 pv = move_num + '. … ' + move;
 288                 toplay = 'W';
 289                 ++i;
 290                 ++move_num;
 291         }
 292         for ( ; i < pretty_pv.length; ++i) {
 293                 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
 294
 295                 if (toplay == 'W') {
 296                         if (i > opt_limit) {
 297                                 return pv + ' (…)';
 298                         }
 299                         if (pv != '') {
 300                                 pv += ' ';
 301                         }
 302                         pv += move_num + '. ' + move;
 303                         ++move_num;
 304                         toplay = 'B';
 305                 } else {
 306                         pv += ' ' + move;
 307                         toplay = 'W';
 308                 }
 309         }
 310         return pv;
 311 }
 312
 313 var update_highlight = function()  {
 314         $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
 315         if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) {
 316                 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
 317                 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
 318         }
 319 }
 320
 321 var update_refutation_lines = function() {
 322         if (display_lines.length > 1) {
 323                 display_lines = [ display_lines[0] ];
 324         }
 325
 326         var tbl = $("#refutationlines");
 327         tbl.empty();
 328
 329         var moves = [];
 330         for (var move in refutation_lines) {
 331                 moves.push(move);
 332         }
 333         var compare = sort_refutation_lines_by_score ? compare_by_score : compare_by_sort_key;
 334         moves = moves.sort(function(a, b) { return compare(refutation_lines, a, b) });
 335         for (var i = 0; i < moves.length; ++i) {
 336                 var line = refutation_lines[moves[i]];
 337
 338                 var tr = document.createElement("tr");
 339
 340                 var move_td = document.createElement("td");
 341                 tr.appendChild(move_td);
 342                 $(move_td).addClass("move");
 343                 if (line['pv_uci'].length == 0) {
 344                         $(move_td).text(line['pretty_move']);
 345                 } else {
 346                         var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['pretty_move'] + "</a>";
 347                         $(move_td).html(move);
 348                 }
 349
 350                 var score_td = document.createElement("td");
 351                 tr.appendChild(score_td);
 352                 $(score_td).addClass("score");
 353                 $(score_td).text(line['pretty_score']);
 354
 355                 var depth_td = document.createElement("td");
 356                 tr.appendChild(depth_td);
 357                 $(depth_td).addClass("depth");
 358                 $(depth_td).text("d" + line['depth']);
 359
 360                 var pv_td = document.createElement("td");
 361                 tr.appendChild(pv_td);
 362                 $(pv_td).addClass("pv");
 363                 $(pv_td).html(print_pv(fen, line['pv_uci'], line['pv_pretty'], move_num, toplay, 10));
 364
 365                 tbl.append(tr);
 366         }
 367
 368         // Make one of the links clickable and the other nonclickable.
 369         if (sort_refutation_lines_by_score) {
 370                 $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(0)\">Move</a>");
 371                 $("#sortbyscore1").html("<strong>Score</strong>");
 372         } else {
 373                 $("#sortbyscore0").html("<strong>Move</strong>");
 374                 $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(1)\">Score</a>");
 375         }
 376 }
 377
 378 var update_board = function(data, num_viewers) {
 379         display_lines = [];
 380
 381         // The headline.
 382         var headline = 'Analysis';
 383         if (data['position']['last_move'] !== 'none') {
 384                 headline += ' after '
 385                 if (data['position']['toplay'] == 'W') {
 386                         headline += (data['position']['move_num']-1) + '… ';
 387                 } else {
 388                         headline += data['position']['move_num'] + '. ';
 389                 }
 390                 headline += data['position']['last_move'];
 391         }
 392
 393         $("#headline").text(headline);
 394
 395         if (num_viewers === null) {
 396                 $("#numviewers").text("");
 397         } else if (num_viewers == 1) {
 398                 $("#numviewers").text("You are the only current viewer");
 399         } else {
 400                 $("#numviewers").text(num_viewers + " current viewers");
 401         }
 402
 403         // The score.
 404         if (data['score'] !== null) {
 405                 $("#score").text(data['score']);
 406         }
 407
 408         // The search stats.
 409         if (data['nodes'] && data['nps'] && data['depth']) {
 410                 var stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
 411                 if (data['seldepth']) {
 412                         stats += ' (' + data['seldepth'] + ' selective)';
 413                 }
 414                 if (data['tbhits'] && data['tbhits'] > 0) {
 415                         if (data['tbhits'] == 1) {
 416                                 stats += ', one Nalimov hit';
 417                         } else {
 418                                 stats += ', ' + data['tbhits'] + ' Nalimov hits';
 419                         }
 420                 }
 421
 422                 $("#searchstats").text(stats);
 423         }
 424
 425         // Update the board itself.
 426         fen = data['position']['fen'];
 427         update_displayed_line();
 428
 429         if (data['position']['last_move_uci']) {
 430                 highlight_from = data['position']['last_move_uci'].substr(0, 2);
 431                 highlight_to = data['position']['last_move_uci'].substr(2, 4);
 432         } else {
 433                 highlight_from = highlight_to = undefined;
 434         }
 435         update_highlight();
 436
 437         // Print the PV.
 438         $("#pv").html(print_pv(data['position']['fen'], data['pv_uci'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay']));
 439
 440         // Update the PV arrow.
 441         clear_arrows();
 442         if (data['pv_uci'].length >= 1) {
 443                 // draw a continuation arrow as long as it's the same piece
 444                 for (var i = 0; i < data['pv_uci'].length; i += 2) {
 445                         var from = data['pv_uci'][i].substr(0, 2);
 446                         var to = data['pv_uci'][i].substr(2,4);
 447                         if ((i >= 2 && from != data['pv_uci'][i - 2].substr(2, 4)) ||
 448                              interfering_arrow(from, to)) {
 449                                 break;
 450                         }
 451                         create_arrow(from, to, '#f66', 6, 20);
 452                 }
 453
 454                 var alt_moves = find_nonstupid_moves(data, 30);
 455                 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
 456                         create_arrow(alt_moves[i].substr(0, 2),
 457                                      alt_moves[i].substr(2, 4), '#f66', 1, 10);
 458                 }
 459         }
 460
 461         // See if all semi-reasonable moves have only one possible response.
 462         if (data['pv_uci'].length >= 2) {
 463                 var nonstupid_moves = find_nonstupid_moves(data, 300);
 464                 var response = data['pv_uci'][1];
 465                 for (var i = 0; i < nonstupid_moves.length; ++i) {
 466                         if (nonstupid_moves[i] == data['pv_uci'][0]) {
 467                                 // ignore the PV move for refutation lines.
 468                                 continue;
 469                         }
 470                         if (!data['refutation_lines'] ||
 471                             !data['refutation_lines'][nonstupid_moves[i]] ||
 472                             !data['refutation_lines'][nonstupid_moves[i]]['pv_uci'] ||
 473                             data['refutation_lines'][nonstupid_moves[i]]['pv_uci'].length < 1) {
 474                                 // Incomplete PV, abort.
 475                                 response = undefined;
 476                                 break;
 477                         }
 478                         var this_response = data['refutation_lines'][nonstupid_moves[i]]['pv_uci'][1];
 479                         if (response !== this_response) {
 480                                 // Different response depending on lines, abort.
 481                                 response = undefined;
 482                                 break;
 483                         }
 484                 }
 485
 486                 if (nonstupid_moves.length > 0 && response !== undefined) {
 487                         create_arrow(response.substr(0, 2),
 488                                      response.substr(2, 4), '#66f', 6, 20);
 489                 }
 490         }
 491
 492         // Update the refutation lines.
 493         fen = data['position']['fen'];
 494         move_num = data['position']['move_num'];
 495         toplay = data['position']['toplay'];
 496         refutation_lines = data['refutation_lines'];
 497         update_refutation_lines();
 498
 499         // Next update.
 500         setTimeout(function() { request_update(); }, 100);
 501 }
 502
 503 var resort_refutation_lines = function(sort_by_score) {
 504         sort_refutation_lines_by_score = sort_by_score;
 505         update_refutation_lines();
 506 }
 507 window['resort_refutation_lines'] = resort_refutation_lines;
 508
 509 var show_line = function(line_num, move_num) {
 510         if (line_num == -1) {
 511                 current_display_line = null;
 512                 current_display_move = null;
 513         } else {
 514                 current_display_line = display_lines[line_num];
 515                 current_display_move = move_num;
 516         }
 517         update_displayed_line();
 518         update_highlight();
 519         redraw_arrows();
 520 }
 521 window['show_line'] = show_line;
 522
 523 var prev_move = function() {
 524         --current_display_move;
 525         update_displayed_line();
 526 }
 527 window['prev_move'] = prev_move;
 528
 529 var next_move = function() {
 530         ++current_display_move;
 531         update_displayed_line();
 532 }
 533 window['next_move'] = prev_move;
 534
 535 var update_displayed_line = function() {
 536         if (current_display_line === null) {
 537                 $("#linenav").hide();
 538                 $("#linemsg").show();
 539                 board.position(fen);
 540                 return;
 541         }
 542
 543         $("#linenav").show();
 544         $("#linemsg").hide();
 545
 546         if (current_display_move == 0) {
 547                 $("#prevmove").html("Previous");
 548         } else {
 549                 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
 550         }
 551         if (current_display_move == current_display_line.uci_pv.length - 1) {
 552                 $("#nextmove").html("Next");
 553         } else {
 554                 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
 555         }
 556
 557         hiddenboard.position(current_display_line.start_fen, false);
 558         for (var i = 0; i <= current_display_move; ++i) {
 559                 var move = current_display_line.uci_pv[i];
 560                 move = move.substr(0, 2) + "-" + move.substr(2, 4);
 561                 hiddenboard.move(move, false);
 562         }
 563         board.position(hiddenboard.position());
 564 }
 565
 566 var init = function() {
 567         // Create board.
 568         board = new window.ChessBoard('board', 'start');
 569         hiddenboard = new window.ChessBoard('hiddenboard', 'start');
 570
 571         request_update();
 572         $(window).resize(function() {
 573                 board.resize();
 574                 update_highlight();
 575                 redraw_arrows();
 576         });
 577 };
 578 $(document).ready(init);
 579
 580 })();