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

   1 var board = null;
   2 var hiddenboard = null;
   3 var arrows = [];
   4 var occupied_by_arrows = [];
   5 var refutation_lines = [];
   6 var move_num = 1;
   7 var toplay = 'W';
   8 var ims = 0;
   9 var sort_refutation_lines_by_score = 0;
  10 var highlight_from = undefined;
  11 var highlight_to = undefined;
  12 var unique = Math.random();
  13
  14 var fen = null;
  15 var display_lines = [];
  16 var current_display_line = null;
  17 var current_display_move = null;
  18
  19 var request_update = function(board) {
  20         $.ajax({
  21                 url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
  22                 //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
  23         }).done(function(data, textstatus, xhr) {
  24                 ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
  25                 var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
  26                 update_board(board, data, num_viewers);
  27         }).fail(function() {
  28                 // Wait ten seconds, then try again.
  29                 setTimeout(function() { request_update(board); }, 10000);
  30         });
  31 }
  32
  33 var clear_arrows = function() {
  34         for (var i = 0; i < arrows.length; ++i) {
  35                 if (arrows[i].svg) {
  36                         arrows[i].svg.parentElement.removeChild(arrows[i].svg);
  37                         delete arrows[i].svg;
  38                 }
  39         }
  40         arrows = [];
  41
  42         occupied_by_arrows = [];
  43         for (var y = 0; y < 8; ++y) {
  44                 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
  45         }
  46 }
  47
  48 var redraw_arrows = function() {
  49         for (var i = 0; i < arrows.length; ++i) {
  50                 position_arrow(arrows[i]);
  51         }
  52 }
  53
  54 var sign = function(x) {
  55         if (x > 0) {
  56                 return 1;
  57         } else if (x < 0) {
  58                 return -1;
  59         } else {
  60                 return 0;
  61         }
  62 }
  63
  64 // See if drawing this arrow on the board would cause unduly amount of confusion.
  65 var interfering_arrow = function(from, to) {
  66         var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
  67         var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
  68         var to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
  69         var to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
  70
  71         occupied_by_arrows[from_row][from_col] = true;
  72
  73         // Knight move: Just check that we haven't been at the destination before.
  74         if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
  75             (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
  76                 return occupied_by_arrows[to_row][to_col];
  77         }
  78
  79         // Sliding piece: Check if anything except the from-square is seen before.
  80         var dx = sign(to_col - from_col);
  81         var dy = sign(to_row - from_row);
  82         var x = from_col;
  83         var y = from_row;
  84         do {
  85                 x += dx;
  86                 y += dy;
  87                 if (occupied_by_arrows[y][x]) {
  88                         return true;
  89                 }
  90                 occupied_by_arrows[y][x] = true;
  91         } while (x != to_col || y != to_row);
  92
  93         return false;
  94 }
  95
  96 var point_from_start = function(x1, y1, x2, y2, t, u) {
  97         var dx = x2 - x1;
  98         var dy = y2 - y1;
  99
 100         var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 101         dx *= norm;
 102         dy *= norm;
 103
 104         var x = x1 + dx * t + dy * u;
 105         var y = y1 + dy * t - dx * u;
 106         return x + " " + y;
 107 }
 108
 109 var point_from_end = function(x1, y1, x2, y2, t, u) {
 110         var dx = x2 - x1;
 111         var dy = y2 - y1;
 112
 113         var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 114         dx *= norm;
 115         dy *= norm;
 116
 117         var x = x2 + dx * t + dy * u;
 118         var y = y2 + dy * t - dx * u;
 119         return x + " " + y;
 120 }
 121
 122 var position_arrow = function(arrow) {
 123         if (arrow.svg) {
 124                 arrow.svg.parentElement.removeChild(arrow.svg);
 125                 delete arrow.svg;
 126         }
 127         if (current_display_line !== null) {
 128                 return;
 129         }
 130
 131         var pos = $(".square-a8").position();
 132
 133         var zoom_factor = $("#board").width() / 400.0;
 134         var line_width = arrow.line_width * zoom_factor;
 135         var arrow_size = arrow.arrow_size * zoom_factor;
 136
 137         var square_width = $(".square-a8").width();
 138         var from_y = (7 - arrow.from_row + 0.5)*square_width;
 139         var to_y = (7 - arrow.to_row + 0.5)*square_width;
 140         var from_x = (arrow.from_col + 0.5)*square_width;
 141         var to_x = (arrow.to_col + 0.5)*square_width;
 142
 143         var SVG_NS = "http://www.w3.org/2000/svg";
 144         var XHTML_NS = "http://www.w3.org/1999/xhtml";
 145         var svg = document.createElementNS(SVG_NS, "svg");
 146         svg.setAttribute("width", $("#board").width());
 147         svg.setAttribute("height", $("#board").height());
 148         svg.setAttribute("style", "position: absolute");
 149         svg.setAttribute("position", "absolute");
 150         svg.setAttribute("version", "1.1");
 151         svg.setAttribute("class", "c1");
 152         svg.setAttribute("xmlns", XHTML_NS);
 153
 154         var x1 = from_x;
 155         var y1 = from_y;
 156         var x2 = to_x;
 157         var y2 = to_y;
 158
 159         // Draw the line.
 160         var outline = document.createElementNS(SVG_NS, "path");
 161         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));
 162         outline.setAttribute("xmlns", XHTML_NS);
 163         outline.setAttribute("stroke", "#666");
 164         outline.setAttribute("stroke-width", line_width + 2);
 165         outline.setAttribute("fill", "none");
 166         svg.appendChild(outline);
 167
 168         var path = document.createElementNS(SVG_NS, "path");
 169         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));
 170         path.setAttribute("xmlns", XHTML_NS);
 171         path.setAttribute("stroke", arrow.fg_color);
 172         path.setAttribute("stroke-width", line_width);
 173         path.setAttribute("fill", "none");
 174         svg.appendChild(path);
 175
 176         // Then the arrow head.
 177         var head = document.createElementNS(SVG_NS, "path");
 178         head.setAttribute("d",
 179                 "M " +  point_from_end(x1, y1, x2, y2, 0, 0) +
 180                 " L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
 181                 " L " + point_from_end(x1, y1, x2, y2, -arrow_size * .623, 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, 0, 0));
 184         head.setAttribute("xmlns", XHTML_NS);
 185         head.setAttribute("stroke", "#000");
 186         head.setAttribute("stroke-width", "1");
 187         head.setAttribute("fill", "#f66");
 188         svg.appendChild(head);
 189
 190         $(svg).css({ top: pos.top, left: pos.left });
 191         document.body.appendChild(svg);
 192         arrow.svg = svg;
 193 }
 194
 195 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
 196         var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
 197         var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
 198         var to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
 199         var to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
 200
 201         // Create arrow.
 202         var arrow = {
 203                 from_col: from_col,
 204                 from_row: from_row,
 205                 to_col: to_col,
 206                 to_row: to_row,
 207                 line_width: line_width,
 208                 arrow_size: arrow_size,
 209                 fg_color: fg_color
 210         };
 211
 212         position_arrow(arrow);
 213         arrows.push(arrow);
 214 }
 215
 216 var compare_by_sort_key = function(refutation_lines, a, b) {
 217         var ska = refutation_lines[a].sort_key;
 218         var skb = refutation_lines[b].sort_key;
 219         if (ska < skb) return -1;
 220         if (ska > skb) return 1;
 221         return 0;
 222 };
 223
 224 var compare_by_score = function(refutation_lines, a, b) {
 225         var sa = parseInt(refutation_lines[b].score_sort_key);
 226         var sb = parseInt(refutation_lines[a].score_sort_key);
 227         return sa - sb;
 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                 ++move_num;
 289         }
 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         var 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, 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 '
 383                 if (data.position.toplay == 'W') {
 384                         headline += (data.position.move_num-1) + '… ';
 385                 } else {
 386                         headline += data.position.move_num + '. ';
 387                 }
 388                 headline += data.position.last_move;
 389         }
 390
 391         $("#headline").text(headline);
 392
 393         if (num_viewers === null) {
 394                 $("#numviewers").text("");
 395         } else if (num_viewers == 1) {
 396                 $("#numviewers").text("You are the only current viewer");
 397         } else {
 398                 $("#numviewers").text(num_viewers + " current viewers");
 399         }
 400
 401         // The score.
 402         if (data.score !== null) {
 403                 $("#score").text(data.score);
 404         }
 405
 406         // The search stats.
 407         if (data.nodes && data.nps && data.depth) {
 408                 var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
 409                 if (data.seldepth) {
 410                         stats += ' (' + data.seldepth + ' selective)';
 411                 }
 412                 if (data.tbhits && data.tbhits > 0) {
 413                         if (data.tbhits == 1) {
 414                                 stats += ', one Nalimov hit';
 415                         } else {
 416                                 stats += ', ' + data.tbhits + ' Nalimov hits';
 417                         }
 418                 }
 419
 420                 $("#searchstats").text(stats);
 421         }
 422
 423         // Update the board itself.
 424         fen = data.position.fen;
 425         update_displayed_line();
 426
 427         if (data.position.last_move_uci) {
 428                 highlight_from = data.position.last_move_uci.substr(0, 2);
 429                 highlight_to = data.position.last_move_uci.substr(2, 4);
 430         } else {
 431                 highlight_from = highlight_to = undefined;
 432         }
 433         update_highlight();
 434
 435         // Print the PV.
 436         $("#pv").html(print_pv(data.position.fen, data.pv_uci, data.pv_pretty, data.position.move_num, data.position.toplay));
 437
 438         // Update the PV arrow.
 439         clear_arrows();
 440         if (data.pv_uci.length >= 1) {
 441                 // draw a continuation arrow as long as it's the same piece
 442                 for (var i = 0; i < data.pv_uci.length; i += 2) {
 443                         var from = data.pv_uci[i].substr(0, 2);
 444                         var to = data.pv_uci[i].substr(2,4);
 445                         if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
 446                              interfering_arrow(from, to)) {
 447                                 break;
 448                         }
 449                         create_arrow(from, to, '#f66', 6, 20);
 450                 }
 451
 452                 var alt_moves = find_nonstupid_moves(data, 30);
 453                 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
 454                         create_arrow(alt_moves[i].substr(0, 2),
 455                                      alt_moves[i].substr(2, 4), '#f66', 1, 10);
 456                 }
 457         }
 458
 459         // See if all semi-reasonable moves have only one possible response.
 460         if (data.pv_uci.length >= 2) {
 461                 var nonstupid_moves = find_nonstupid_moves(data, 300);
 462                 var response = data.pv_uci[1];
 463                 for (var i = 0; i < nonstupid_moves.length; ++i) {
 464                         if (nonstupid_moves[i] == data.pv_uci[0]) {
 465                                 // ignore the PV move for refutation lines.
 466                                 continue;
 467                         }
 468                         if (!data.refutation_lines ||
 469                             !data.refutation_lines[nonstupid_moves[i]] ||
 470                             !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
 471                             data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
 472                                 // Incomplete PV, abort.
 473                                 response = undefined;
 474                                 break;
 475                         }
 476                         var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
 477                         if (response !== this_response) {
 478                                 // Different response depending on lines, abort.
 479                                 response = undefined;
 480                                 break;
 481                         }
 482                 }
 483
 484                 if (nonstupid_moves.length > 0 && response !== undefined) {
 485                         create_arrow(response.substr(0, 2),
 486                                      response.substr(2, 4), '#66f', 6, 20);
 487                 }
 488         }
 489
 490         // Update the refutation lines.
 491         fen = data.position.fen;
 492         move_num = data.position.move_num;
 493         toplay = data.position.toplay;
 494         refutation_lines = data.refutation_lines;
 495         update_refutation_lines(board);
 496
 497         // Next update.
 498         setTimeout(function() { request_update(board); }, 100);
 499 }
 500
 501 var resort_refutation_lines = function(sort_by_score) {
 502         sort_refutation_lines_by_score = sort_by_score;
 503         update_refutation_lines(board);
 504 }
 505
 506 var show_line = function(line_num, move_num) {
 507         if (line_num == -1) {
 508                 current_display_line = null;
 509                 current_display_move = null;
 510         } else {
 511                 current_display_line = display_lines[line_num];
 512                 current_display_move = move_num;
 513         }
 514         update_displayed_line();
 515         update_highlight();
 516         redraw_arrows();
 517 }
 518
 519 var prev_move = function() {
 520         --current_display_move;
 521         update_displayed_line();
 522 }
 523
 524 var next_move = function() {
 525         ++current_display_move;
 526         update_displayed_line();
 527 }
 528
 529 var update_displayed_line = function() {
 530         if (current_display_line === null) {
 531                 $("#linenav").hide();
 532                 $("#linemsg").show();
 533                 board.position(fen);
 534                 return;
 535         }
 536
 537         $("#linenav").show();
 538         $("#linemsg").hide();
 539
 540         if (current_display_move == 0) {
 541                 $("#prevmove").html("Previous");
 542         } else {
 543                 $("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
 544         }
 545         if (current_display_move == current_display_line.uci_pv.length - 1) {
 546                 $("#nextmove").html("Next");
 547         } else {
 548                 $("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
 549         }
 550
 551         hiddenboard.position(current_display_line.start_fen, false);
 552         for (var i = 0; i <= current_display_move; ++i) {
 553                 var move = current_display_line.uci_pv[i];
 554                 move = move.substr(0, 2) + "-" + move.substr(2, 4);
 555                 hiddenboard.move(move, false);
 556         }
 557         board.position(hiddenboard.position());
 558 }
 559
 560 var init = function() {
 561         // Create board.
 562         board = new ChessBoard('board', 'start');
 563         hiddenboard = new ChessBoard('hiddenboard', 'start');
 564
 565         request_update(board);
 566         $(window).resize(function() {
 567                 board.resize();
 568                 update_highlight();
 569                 redraw_arrows();
 570         });
 571 };
 572 $(document).ready(init);