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

   1 var board = null;
   2 var hiddenboard = null;
   3 var arrows = [];
   4 var arrow_targets = [];
   5 var occupied_by_arrows = [];
   6 var refutation_lines = [];
   7 var move_num = 1;
   8 var toplay = 'W';
   9 var ims = 0;
  10 var sort_refutation_lines_by_score = 0;
  11 var highlight_from = undefined;
  12 var highlight_to = undefined;
  13 var unique = Math.random();
  14
  15 var fen = null;
  16 var display_lines = [];
  17 var current_display_line = null;
  18 var current_display_move = null;
  19
  20 var request_update = function(board) {
  21         $.ajax({
  22                 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
  23                 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
  24         }).done(function(data, textstatus, xhr) {
  25                 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
  26                 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
  27                 update_board(board, data, num_viewers);
  28         }).fail(function() {
  29                 // Wait ten seconds, then try again.
  30                 setTimeout(function() { request_update(board); }, 10000);
  31         });
  32 }
  33
  34 var clear_arrows = function() {
  35         for (var i = 0; i < arrows.length; ++i) {
  36                 jsPlumb.detach(arrows[i].connection1);
  37                 jsPlumb.detach(arrows[i].connection2);
  38         }
  39         arrows = [];
  40
  41         for (var i = 0; i < arrow_targets.length; ++i) {
  42                 document.body.removeChild(arrow_targets[i]);
  43         }
  44         arrow_targets = [];
  45
  46         occupied_by_arrows = [];
  47         for (var y = 0; y < 8; ++y) {
  48                 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
  49         }
  50 }
  51
  52 var redraw_arrows = function() {
  53         for (var i = 0; i < arrows.length; ++i) {
  54                 position_arrow(arrows[i]);
  55         }
  56 }
  57
  58 var sign = function(x) {
  59         if (x > 0) {
  60                 return 1;
  61         } else if (x < 0) {
  62                 return -1;
  63         } else {
  64                 return 0;
  65         }
  66 }
  67
  68 // See if drawing this arrow on the board would cause unduly amount of confusion.
  69 var interfering_arrow = function(from, to) {
  70         var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
  71         var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
  72         var to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
  73         var to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
  74
  75         occupied_by_arrows[from_row][from_col] = true;
  76
  77         // Knight move: Just check that we haven't been at the destination before.
  78         if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
  79             (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
  80                 return occupied_by_arrows[to_row][to_col];
  81         }
  82
  83         // Sliding piece: Check if anything except the from-square is seen before.
  84         var dx = sign(to_col - from_col);
  85         var dy = sign(to_row - from_row);
  86         var x = from_col;
  87         var y = from_row;
  88         do {
  89                 x += dx;
  90                 y += dy;
  91                 if (occupied_by_arrows[y][x]) {
  92                         return true;
  93                 }
  94                 occupied_by_arrows[y][x] = true;
  95         } while (x != to_col || y != to_row);
  96
  97         return false;
  98 }
  99
 100 var add_target = function() {
 101         var elem = document.createElement("div");
 102         $(elem).addClass("window");
 103         elem.id = "target" + arrow_targets.length;
 104         document.body.appendChild(elem);
 105         arrow_targets.push(elem);
 106         return elem.id;
 107 }
 108
 109 var position_arrow = function(arrow) {
 110         var zoom_factor = $("#board").width() / 400.0;
 111         var line_width = arrow.line_width * zoom_factor;
 112         var arrow_size = arrow.arrow_size * zoom_factor;
 113
 114         var square_width = $(".square-a8").width();
 115         var from_y = (7 - arrow.from_row + 0.5)*square_width;
 116         var to_y = (7 - arrow.to_row + 0.5)*square_width;
 117         var from_x = (arrow.from_col + 0.5)*square_width;
 118         var to_x = (arrow.to_col + 0.5)*square_width;
 119
 120         var dx = to_x - from_x;
 121         var dy = to_y - from_y;
 122         var len = Math.sqrt(dx * dx + dy * dy);
 123         dx /= len;
 124         dy /= len;
 125         var pos = $(".square-a8").position();
 126         $("#" + arrow.s1).css({ top: pos.top + from_y + (0.5 * arrow_size) * dy, left: pos.left + from_x + (0.5 * arrow_size) * dx });
 127         $("#" + arrow.d1).css({ top: pos.top + to_y - (0.5 * arrow_size) * dy, left: pos.left + to_x - (0.5 * arrow_size) * dx });
 128         $("#" + arrow.s1v).css({ top: pos.top + from_y - 0 * dy, left: pos.left + from_x - 0 * dx });
 129         $("#" + arrow.d1v).css({ top: pos.top + to_y + 0 * dy, left: pos.left + to_x + 0 * dx });
 130
 131         if (arrow.connection1) {
 132                 jsPlumb.detach(arrow.connection1);
 133         }
 134         if (arrow.connection2) {
 135                 jsPlumb.detach(arrow.connection2);
 136         }
 137         if (current_display_line !== null) {
 138                 delete arrow.connection1;
 139                 delete arrow.connection2;
 140                 return;
 141         }
 142         arrow.connection1 = jsPlumb.connect({
 143                 source: arrow.s1,
 144                 target: arrow.d1,
 145                 connector:["Straight"],
 146                 cssClass:"c1",
 147                 endpoint:"Blank",
 148                 endpointClass:"c1Endpoint",
 149                 anchor:"Continuous",
 150                 paintStyle:{
 151                         lineWidth:line_width,
 152                         strokeStyle:arrow.fg_color,
 153                         outlineWidth:1,
 154                         outlineColor:"#666",
 155                         opacity:"60%"
 156                 }
 157         });
 158         arrow.connection2 = jsPlumb.connect({
 159                 source: arrow.s1v,
 160                 target: arrow.d1v,
 161                 connector:["Straight"],
 162                 cssClass:"vir",
 163                 endpoint:"Blank",
 164                 endpointClass:"c1Endpoint",
 165                 anchor:"Continuous",
 166                 paintStyle:{
 167                         lineWidth:0,
 168                         strokeStyle:arrow.fg_color,
 169                         outlineWidth:0,
 170                         outlineColor:"#666",
 171                 },
 172                 overlays : [
 173                         ["Arrow", {
 174                                 cssClass:"l1arrow",
 175                                 location:1.0,
 176                                 width: arrow_size,
 177                                 length: arrow_size,
 178                                 paintStyle: {
 179                                         lineWidth:line_width,
 180                                         strokeStyle:"#000",
 181                                 },
 182                         }]
 183                 ]
 184         });
 185 }
 186
 187 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
 188         var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
 189         var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
 190         var to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
 191         var to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
 192
 193         // Create arrow.
 194         var arrow = {
 195                 s1: add_target(),
 196                 d1: add_target(),
 197                 s1v: add_target(),
 198                 d1v: add_target(),
 199                 from_col: from_col,
 200                 from_row: from_row,
 201                 to_col: to_col,
 202                 to_row: to_row,
 203                 line_width: line_width,
 204                 arrow_size: arrow_size,
 205                 fg_color: fg_color
 206         };
 207
 208         position_arrow(arrow);
 209         arrows.push(arrow);
 210 }
 211
 212 var compare_by_sort_key = function(refutation_lines, toplay, a, b) {
 213         var ska = refutation_lines[a].sort_key;
 214         var skb = refutation_lines[b].sort_key;
 215         if (ska < skb) return -1;
 216         if (ska > skb) return 1;
 217         return 0;
 218 };
 219
 220 var compare_by_score = function(refutation_lines, toplay, a, b) {
 221         var sa = parseInt(refutation_lines[b].score_sort_key);
 222         var sb = parseInt(refutation_lines[a].score_sort_key);
 223         if (toplay == 'B') {
 224                 return sb - sa;
 225         } else {
 226                 return sa - sb;
 227         }
 228 }
 229
 230 // Fake multi-PV using the refutation lines. Find all “relevant” moves,
 231 // sorted by quality, descending.
 232 var find_nonstupid_moves = function(data, margin) {
 233         // First of all, if there are any moves that are more than 0.5 ahead of
 234         // the primary move, the refutation lines are probably bunk, so just
 235         // kill them all.
 236         var best_score = undefined;
 237         var pv_score = undefined;
 238         for (var move in data.refutation_lines) {
 239                 var score = parseInt(data.refutation_lines[move].score_sort_key);
 240                 if (move == data.pv_uci[0]) {
 241                         pv_score = score;
 242                 }
 243                 if (best_score === undefined || score > best_score) {
 244                         best_score = score;
 245                 }
 246                 if (!(data.refutation_lines[move].depth >= 8)) {
 247                         return [];
 248                 }
 249         }
 250
 251         if (best_score - pv_score > 50) {
 252                 return [];
 253         }
 254
 255         // Now find all moves that are within “margin” of the best score.
 256         // The PV move will always be first.
 257         var moves = [];
 258         for (var move in data.refutation_lines) {
 259                 var score = parseInt(data.refutation_lines[move].score_sort_key);
 260                 if (move != data.pv_uci[0] && best_score - score <= margin) {
 261                         moves.push(move);
 262                 }
 263         }
 264         moves = moves.sort(function(a, b) { return compare_by_score(data.refutation_lines, a, b) });
 265         moves.unshift(data.pv_uci[0]);
 266
 267         return moves;
 268 }
 269
 270 var thousands = function(x) {
 271         return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
 272 }
 273
 274 var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, limit) {
 275         display_lines.push({
 276                 start_fen: fen,
 277                 uci_pv: uci_pv,
 278                 pretty_pv: pretty_pv
 279         });
 280
 281         var pv = '';
 282         var i = 0;
 283         if (toplay == 'B') {
 284                 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
 285                 pv = move_num + '. … ' + move;
 286                 toplay = 'W';
 287                 ++i;
 288         }
 289         ++move_num;
 290         for ( ; i < pretty_pv.length; ++i) {
 291                 var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
 292
 293                 if (toplay == 'W') {
 294                         if (i > limit) {
 295                                 return pv + ' (…)';
 296                         }
 297                         if (pv != '') {
 298                                 pv += ' ';
 299                         }
 300                         pv += move_num + '. ' + move;
 301                         ++move_num;
 302                         toplay = 'B';
 303                 } else {
 304                         pv += ' ' + move;
 305                         toplay = 'W';
 306                 }
 307         }
 308         return pv;
 309 }
 310
 311 var update_highlight = function()  {
 312         $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
 313         if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) {
 314                 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
 315                 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
 316         }
 317 }
 318
 319 var update_refutation_lines = function(board) {
 320         if (display_lines.length > 1) {
 321                 display_lines = [ display_lines[0] ];
 322         }
 323
 324         var tbl = $("#refutationlines");
 325         tbl.empty();
 326
 327         moves = [];
 328         for (var move in refutation_lines) {
 329                 moves.push(move);
 330         }
 331         var compare = sort_refutation_lines_by_score ? compare_by_score : compare_by_sort_key;
 332         moves = moves.sort(function(a, b) { return compare(refutation_lines, toplay, a, b) });
 333         for (var i = 0; i < moves.length; ++i) {
 334                 var line = refutation_lines[moves[i]];
 335
 336                 var tr = document.createElement("tr");
 337
 338                 var move_td = document.createElement("td");
 339                 tr.appendChild(move_td);
 340                 $(move_td).addClass("move");
 341                 if (line.pv_uci.length == 0) {
 342                         $(move_td).text(line.pretty_move);
 343                 } else {
 344                         var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line.pretty_move + "</a>";
 345                         $(move_td).html(move);
 346                 }
 347
 348                 var score_td = document.createElement("td");
 349                 tr.appendChild(score_td);
 350                 $(score_td).addClass("score");
 351                 $(score_td).text(line.pretty_score);
 352
 353                 var depth_td = document.createElement("td");
 354                 tr.appendChild(depth_td);
 355                 $(depth_td).addClass("depth");
 356                 $(depth_td).text("d" + line.depth);
 357
 358                 var pv_td = document.createElement("td");
 359                 tr.appendChild(pv_td);
 360                 $(pv_td).addClass("pv");
 361                 $(pv_td).html(print_pv(fen, line.pv_uci, line.pv_pretty, move_num, toplay, 10));
 362
 363                 tbl.append(tr);
 364         }
 365
 366         // Make one of the links clickable and the other nonclickable.
 367         if (sort_refutation_lines_by_score) {
 368                 $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(0)\">Move</a>");
 369                 $("#sortbyscore1").html("<strong>Score</strong>");
 370         } else {
 371                 $("#sortbyscore0").html("<strong>Move</strong>");
 372                 $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(1)\">Score</a>");
 373         }
 374 }
 375
 376 var update_board = function(board, data, num_viewers) {
 377         display_lines = [];
 378
 379         // The headline.
 380         var headline = 'Analysis';
 381         if (data.position.last_move !== 'none') {
 382                 headline += ' after ' + data.position.move_num + '. ';
 383                 if (data.position.toplay == 'W') {
 384                         headline += '… ';
 385                 }
 386                 headline += data.position.last_move;
 387         }
 388
 389         $("#headline").text(headline);
 390
 391         if (num_viewers === null) {
 392                 $("#numviewers").text("");
 393         } else if (num_viewers == 1) {
 394                 $("#numviewers").text("You are the only current viewer");
 395         } else {
 396                 $("#numviewers").text(num_viewers + " current viewers");
 397         }
 398
 399         // The score.
 400         if (data.score !== null) {
 401                 $("#score").text(data.score);
 402         }
 403
 404         // The search stats.
 405         if (data.nodes && data.nps && data.depth) {
 406                 var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
 407                 if (data.seldepth) {
 408                         stats += ' (' + data.seldepth + ' selective)';
 409                 }
 410                 if (data.tbhits && data.tbhits > 0) {
 411                         if (data.tbhits == 1) {
 412                                 stats += ', one Nalimov hit';
 413                         } else {
 414                                 stats += ', ' + data.tbhits + ' Nalimov hits';
 415                         }
 416                 }
 417
 418
 419                 $("#searchstats").text(stats);
 420         }
 421
 422         // Update the board itself.
 423         fen = data.position.fen;
 424         update_displayed_line();
 425
 426         if (data.position.last_move_uci) {
 427                 highlight_from = data.position.last_move_uci.substr(0, 2);
 428                 highlight_to = data.position.last_move_uci.substr(2, 4);
 429         } else {
 430                 highlight_from = highlight_to = undefined;
 431         }
 432         update_highlight();
 433
 434         // Print the PV.
 435         $("#pv").html(print_pv(data.position.fen, data.pv_uci, data.pv_pretty, data.position.move_num, data.position.toplay));
 436
 437         // Update the PV arrow.
 438         clear_arrows();
 439         if (data.pv_uci.length >= 1) {
 440                 // draw a continuation arrow as long as it's the same piece
 441                 for (var i = 0; i < data.pv_uci.length; i += 2) {
 442                         var from = data.pv_uci[i].substr(0, 2);
 443                         var to = data.pv_uci[i].substr(2,4);
 444                         if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
 445                              interfering_arrow(from, to)) {
 446                                 break;
 447                         }
 448                         create_arrow(from, to, '#f66', 6, 20);
 449                 }
 450
 451                 var alt_moves = find_nonstupid_moves(data, 30);
 452                 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
 453                         create_arrow(alt_moves[i].substr(0, 2),
 454                                      alt_moves[i].substr(2, 4), '#f66', 1, 10);
 455                 }
 456         }
 457
 458         // See if all semi-reasonable moves have only one possible response.
 459         if (data.pv_uci.length >= 2) {
 460                 var nonstupid_moves = find_nonstupid_moves(data, 300);
 461                 var response = data.pv_uci[1];
 462                 for (var i = 0; i < nonstupid_moves.length; ++i) {
 463                         if (nonstupid_moves[i] == data.pv_uci[0]) {
 464                                 // ignore the PV move for refutation lines.
 465                                 continue;
 466                         }
 467                         if (!data.refutation_lines ||
 468                             !data.refutation_lines[nonstupid_moves[i]] ||
 469                             !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
 470                             data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
 471                                 // Incomplete PV, abort.
 472                                 response = undefined;
 473                                 break;
 474                         }
 475                         var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
 476                         if (response !== this_response) {
 477                                 // Different response depending on lines, abort.
 478                                 response = undefined;
 479                                 break;
 480                         }
 481                 }
 482
 483                 if (nonstupid_moves.length > 0 && response !== undefined) {
 484                         create_arrow(response.substr(0, 2),
 485                                      response.substr(2, 4), '#66f', 6, 20);
 486                 }
 487         }
 488
 489         // Update the refutation lines.
 490         fen = data.position.fen;
 491         move_num = data.position.move_num;
 492         toplay = data.position.toplay;
 493         refutation_lines = data.refutation_lines;
 494         update_refutation_lines(board);
 495
 496         // Next update.
 497         setTimeout(function() { request_update(board); }, 100);
 498 }
 499
 500 var resort_refutation_lines = function(sort_by_score) {
 501         sort_refutation_lines_by_score = sort_by_score;
 502         update_refutation_lines(board);
 503 }
 504
 505 var show_line = function(line_num, move_num) {
 506         if (line_num == -1) {
 507                 current_display_line = null;
 508                 current_display_move = null;
 509         } else {
 510                 current_display_line = display_lines[line_num];
 511                 current_display_move = move_num;
 512         }
 513         update_displayed_line();
 514         update_highlight();
 515         redraw_arrows();
 516 }
 517
 518 var prev_move = function() {
 519         --current_display_move;
 520         update_displayed_line();
 521 }
 522
 523 var next_move = function() {
 524         ++current_display_move;
 525         update_displayed_line();
 526 }
 527
 528 var update_displayed_line = function() {
 529         if (current_display_line === null) {
 530                 $("#linenav").hide();
 531                 $("#linemsg").show();
 532                 board.position(fen);
 533                 return;
 534         }
 535
 536         $("#linenav").show();
 537         $("#linemsg").hide();
 538
 539         if (current_display_move == 0) {
 540                 $("#prevmove").html("Previous");
 541         } else {
 542                 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
 543         }
 544         if (current_display_move == current_display_line.uci_pv.length - 1) {
 545                 $("#nextmove").html("Next");
 546         } else {
 547                 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
 548         }
 549
 550         hiddenboard.position(current_display_line.start_fen, false);
 551         for (var i = 0; i <= current_display_move; ++i) {
 552                 var move = current_display_line.uci_pv[i];
 553                 move = move.substr(0, 2) + "-" + move.substr(2, 4);
 554                 hiddenboard.move(move, false);
 555         }
 556         board.position(hiddenboard.position());
 557 }
 558
 559 var init = function() {
 560         // Create board.
 561         board = new ChessBoard('board', 'start');
 562         hiddenboard = new ChessBoard('hiddenboard', 'start');
 563
 564         request_update(board);
 565         $(window).resize(function() {
 566                 board.resize();
 567                 update_highlight();
 568                 redraw_arrows();
 569         });
 570 };
 571 $(document).ready(init);