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

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