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         }).fail(function() {
  21                 // Wait ten seconds, then try again.
  22                 setTimeout(function() { request_update(board); }, 10000);
  23         });
  24 }
  25
  26 var clear_arrows = function() {
  27         for (var i = 0; i < arrows.length; ++i) {
  28                 jsPlumb.detach(arrows[i].connection1);
  29                 jsPlumb.detach(arrows[i].connection2);
  30         }
  31         arrows = [];
  32
  33         for (var i = 0; i < arrow_targets.length; ++i) {
  34                 document.body.removeChild(arrow_targets[i]);
  35         }
  36         arrow_targets = [];
  37
  38         occupied_by_arrows = [];
  39         for (var y = 0; y < 8; ++y) {
  40                 occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
  41         }
  42 }
  43
  44 var redraw_arrows = function() {
  45         for (var i = 0; i < arrows.length; ++i) {
  46                 position_arrow(arrows[i]);
  47         }
  48 }
  49
  50 var sign = function(x) {
  51         if (x > 0) {
  52                 return 1;
  53         } else if (x < 0) {
  54                 return -1;
  55         } else {
  56                 return 0;
  57         }
  58 }
  59
  60 // See if drawing this arrow on the board would cause unduly amount of confusion.
  61 var interfering_arrow = function(from, to) {
  62         var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
  63         var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
  64         var to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
  65         var to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
  66
  67         occupied_by_arrows[from_row][from_col] = true;
  68
  69         // Knight move: Just check that we haven't been at the destination before.
  70         if ((Math.abs(to_col - from_col) == 2 && Math.abs(to_row - from_row) == 1) ||
  71             (Math.abs(to_col - from_col) == 1 && Math.abs(to_row - from_row) == 2)) {
  72                 return occupied_by_arrows[to_row][to_col];
  73         }
  74
  75         // Sliding piece: Check if anything except the from-square is seen before.
  76         var dx = sign(to_col - from_col);
  77         var dy = sign(to_row - from_row);
  78         var x = from_col;
  79         var y = from_row;
  80         do {
  81                 x += dx;
  82                 y += dy;
  83                 if (occupied_by_arrows[y][x]) {
  84                         return true;
  85                 }
  86                 occupied_by_arrows[y][x] = true;
  87         } while (x != to_col || y != to_row);
  88
  89         return false;
  90 }
  91
  92 var add_target = function() {
  93         var elem = document.createElement("div");
  94         $(elem).addClass("window");
  95         elem.id = "target" + arrow_targets.length;
  96         document.body.appendChild(elem);
  97         arrow_targets.push(elem);
  98         return elem.id;
  99 }
 100
 101 var position_arrow = function(arrow) {
 102         var zoom_factor = $("#board").width() / 400.0;
 103         var line_width = arrow.line_width * zoom_factor;
 104         var arrow_size = arrow.arrow_size * zoom_factor;
 105
 106         var square_width = $(".square-a8").width();
 107         var from_y = (7 - arrow.from_row + 0.5)*square_width;
 108         var to_y = (7 - arrow.to_row + 0.5)*square_width;
 109         var from_x = (arrow.from_col + 0.5)*square_width;
 110         var to_x = (arrow.to_col + 0.5)*square_width;
 111
 112         var dx = to_x - from_x;
 113         var dy = to_y - from_y;
 114         var len = Math.sqrt(dx * dx + dy * dy);
 115         dx /= len;
 116         dy /= len;
 117         var pos = $(".square-a8").position();
 118         $("#" + arrow.s1).css({ top: pos.top + from_y + (0.5 * arrow_size) * dy, left: pos.left + from_x + (0.5 * arrow_size) * dx });
 119         $("#" + arrow.d1).css({ top: pos.top + to_y - (0.5 * arrow_size) * dy, left: pos.left + to_x - (0.5 * arrow_size) * dx });
 120         $("#" + arrow.s1v).css({ top: pos.top + from_y - 0 * dy, left: pos.left + from_x - 0 * dx });
 121         $("#" + arrow.d1v).css({ top: pos.top + to_y + 0 * dy, left: pos.left + to_x + 0 * dx });
 122
 123         if (arrow.connection1) {
 124                 jsPlumb.detach(arrow.connection1);
 125         }
 126         if (arrow.connection2) {
 127                 jsPlumb.detach(arrow.connection2);
 128         }
 129         arrow.connection1 = jsPlumb.connect({
 130                 source: arrow.s1,
 131                 target: arrow.d1,
 132                 connector:["Straight"],
 133                 cssClass:"c1",
 134                 endpoint:"Blank",
 135                 endpointClass:"c1Endpoint",
 136                 anchor:"Continuous",
 137                 paintStyle:{
 138                         lineWidth:line_width,
 139                         strokeStyle:arrow.fg_color,
 140                         outlineWidth:1,
 141                         outlineColor:"#666",
 142                         opacity:"60%"
 143                 }
 144         });
 145         arrow.connection2 = jsPlumb.connect({
 146                 source: arrow.s1v,
 147                 target: arrow.d1v,
 148                 connector:["Straight"],
 149                 cssClass:"vir",
 150                 endpoint:"Blank",
 151                 endpointClass:"c1Endpoint",
 152                 anchor:"Continuous",
 153                 paintStyle:{
 154                         lineWidth:0,
 155                         strokeStyle:arrow.fg_color,
 156                         outlineWidth:0,
 157                         outlineColor:"#666",
 158                 },
 159                 overlays : [
 160                         ["Arrow", {
 161                                 cssClass:"l1arrow",
 162                                 location:1.0,
 163                                 width: arrow_size,
 164                                 length: arrow_size,
 165                                 paintStyle: {
 166                                         lineWidth:line_width,
 167                                         strokeStyle:"#000",
 168                                 },
 169                         }]
 170                 ]
 171         });
 172 }
 173
 174 var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
 175         var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
 176         var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
 177         var to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
 178         var to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
 179
 180         // Create arrow.
 181         var arrow = {
 182                 s1: add_target(),
 183                 d1: add_target(),
 184                 s1v: add_target(),
 185                 d1v: add_target(),
 186                 from_col: from_col,
 187                 from_row: from_row,
 188                 to_col: to_col,
 189                 to_row: to_row,
 190                 line_width: line_width,
 191                 arrow_size: arrow_size,
 192                 fg_color: fg_color
 193         };
 194
 195         position_arrow(arrow);
 196         arrows.push(arrow);
 197 }
 198
 199 // Fake multi-PV using the refutation lines. Find all “relevant” moves,
 200 // sorted by quality, descending.
 201 var find_nonstupid_moves = function(data, margin) {
 202         // First of all, if there are any moves that are more than 0.5 ahead of
 203         // the primary move, the refutation lines are probably bunk, so just
 204         // kill them all.
 205         var best_score = undefined;
 206         var pv_score = undefined;
 207         for (var move in data.refutation_lines) {
 208                 var score = parseInt(data.refutation_lines[move].score_sort_key);
 209                 if (move == data.pv_uci[0]) {
 210                         pv_score = score;
 211                 }
 212                 if (best_score === undefined || score > best_score) {
 213                         best_score = score;
 214                 }
 215                 if (!(data.refutation_lines[move].depth >= 8)) {
 216                         return [];
 217                 }
 218         }
 219
 220         if (best_score - pv_score > 50) {
 221                 return [];
 222         }
 223
 224         // Now find all moves that are within “margin” of the best score.
 225         // The PV move will always be first.
 226         var moves = [];
 227         for (var move in data.refutation_lines) {
 228                 var score = parseInt(data.refutation_lines[move].score_sort_key);
 229                 if (move != data.pv_uci[0] && best_score - score <= margin) {
 230                         moves.push(move);
 231                 }
 232         }
 233         moves = moves.sort(function(a, b) { return parseInt(data.refutation_lines[b].score_sort_key) - parseInt(data.refutation_lines[a].score_sort_key); });
 234         moves.unshift(data.pv_uci[0]);
 235
 236         return moves;
 237 }
 238
 239 var thousands = function(x) {
 240         return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
 241 }
 242
 243 var print_pv = function(pretty_pv, move_num, toplay, limit) {
 244         var pv = '';
 245         var i = 0;
 246         if (toplay == 'B') {
 247                 pv = move_num + '. … ' + pretty_pv[0];
 248                 toplay = 'W';
 249                 ++i;
 250         }
 251         ++move_num;
 252         for ( ; i < pretty_pv.length; ++i) {
 253                 if (toplay == 'W') {
 254                         if (i > limit) {
 255                                 return pv + ' (…)';
 256                         }
 257                         if (pv != '') {
 258                                 pv += ' ';
 259                         }
 260                         pv += move_num + '. ' + pretty_pv[i];
 261                         ++move_num;
 262                         toplay = 'B';
 263                 } else {
 264                         pv += ' ' + pretty_pv[i];
 265                         toplay = 'W';
 266                 }
 267         }
 268         return pv;
 269 }
 270
 271 var compare_by_sort_key = function(data, a, b) {
 272         var ska = data.refutation_lines[a].sort_key;
 273         var skb = data.refutation_lines[b].sort_key;
 274         if (ska < skb) return -1;
 275         if (ska > skb) return 1;
 276         return 0;
 277 };
 278
 279 var update_highlight = function()  {
 280         $("#board").find('.square-55d63').removeClass('nonuglyhighlight');
 281         if (highlight_from !== undefined && highlight_to !== undefined) {
 282                 $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
 283                 $("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
 284         }
 285 }
 286
 287 var update_board = function(board, data, num_viewers) {
 288         // The headline.
 289         var headline = 'Analysis';
 290         if (data.position.last_move !== 'none') {
 291                 headline += ' after ' + data.position.move_num + '. ';
 292                 if (data.position.toplay == 'W') {
 293                         headline += '… ';
 294                 }
 295                 headline += data.position.last_move;
 296         }
 297
 298         $("#headline").text(headline);
 299
 300         if (num_viewers === null) {
 301                 $("#numviewers").text("");
 302         } else if (num_viewers == 1) {
 303                 $("#numviewers").text("You are the only current viewer");
 304         } else {
 305                 $("#numviewers").text(num_viewers + " current viewers");
 306         }
 307
 308         // The score.
 309         if (data.score !== null) {
 310                 $("#score").text(data.score);
 311         }
 312
 313         // The search stats.
 314         if (data.nodes && data.nps && data.depth) {
 315                 var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
 316                 if (data.seldepth) {
 317                         stats += ' (' + data.seldepth + ' selective)';
 318                 }
 319                 if (data.tbhits && data.tbhits > 0) {
 320                         if (data.tbhits == 1) {
 321                                 stats += ', one Nalimov hit';
 322                         } else {
 323                                 stats += ', ' + data.tbhits + ' Nalimov hits';
 324                         }
 325                 }
 326
 327
 328                 $("#searchstats").text(stats);
 329         }
 330
 331         // Update the board itself.
 332         board.position(data.position.fen);
 333
 334         if (data.position.last_move_uci) {
 335                 highlight_from = data.position.last_move_uci.substr(0, 2);
 336                 highlight_to = data.position.last_move_uci.substr(2, 4);
 337         } else {
 338                 highlight_from = highlight_to = undefined;
 339         }
 340         update_highlight();
 341
 342         // Print the PV.
 343         var pv = print_pv(data.pv_pretty, data.position.move_num, data.position.toplay);
 344         $("#pv").text(pv);
 345
 346         // Update the PV arrow.
 347         clear_arrows();
 348         if (data.pv_uci.length >= 1) {
 349                 // draw a continuation arrow as long as it's the same piece
 350                 for (var i = 0; i < data.pv_uci.length; i += 2) {
 351                         var from = data.pv_uci[i].substr(0, 2);
 352                         var to = data.pv_uci[i].substr(2,4);
 353                         if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
 354                              interfering_arrow(from, to)) {
 355                                 break;
 356                         }
 357                         create_arrow(from, to, '#f66', 6, 20);
 358                 }
 359
 360                 var alt_moves = find_nonstupid_moves(data, 30);
 361                 for (var i = 1; i < alt_moves.length && i < 3; ++i) {
 362                         create_arrow(alt_moves[i].substr(0, 2),
 363                                      alt_moves[i].substr(2, 4), '#f66', 1, 10);
 364                 }
 365         }
 366
 367         // See if all semi-reasonable moves have only one possible response.
 368         if (data.pv_uci.length >= 2) {
 369                 var nonstupid_moves = find_nonstupid_moves(data, 300);
 370                 var response = data.pv_uci[1];
 371                 for (var i = 0; i < nonstupid_moves.length; ++i) {
 372                         if (nonstupid_moves[i] == data.pv_uci[0]) {
 373                                 // ignore the PV move for refutation lines.
 374                                 continue;
 375                         }
 376                         if (!data.refutation_lines ||
 377                             !data.refutation_lines[nonstupid_moves[i]] ||
 378                             !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
 379                             data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
 380                                 // Incomplete PV, abort.
 381                                 response = undefined;
 382                                 break;
 383                         }
 384                         var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
 385                         if (response !== this_response) {
 386                                 // Different response depending on lines, abort.
 387                                 response = undefined;
 388                                 break;
 389                         }
 390                 }
 391
 392                 if (nonstupid_moves.length > 0 && response !== undefined) {
 393                         create_arrow(response.substr(0, 2),
 394                                      response.substr(2, 4), '#66f', 6, 20);
 395                 }
 396         }
 397
 398         // Show the refutation lines.
 399         var tbl = $("#refutationlines");
 400         tbl.empty();
 401
 402         moves = [];
 403         for (var move in data.refutation_lines) {
 404                 moves.push(move);
 405         }
 406         moves = moves.sort(function(a, b) { return compare_by_sort_key(data, a, b) });
 407         for (var i = 0; i < moves.length; ++i) {
 408                 var line = data.refutation_lines[moves[i]];
 409
 410                 var tr = document.createElement("tr");
 411
 412                 var move_td = document.createElement("td");
 413                 tr.appendChild(move_td);
 414                 $(move_td).addClass("move");
 415                 $(move_td).text(line.pretty_move);
 416
 417                 var score_td = document.createElement("td");
 418                 tr.appendChild(score_td);
 419                 $(score_td).addClass("score");
 420                 $(score_td).text(line.pretty_score);
 421
 422                 var depth_td = document.createElement("td");
 423                 tr.appendChild(depth_td);
 424                 $(depth_td).addClass("depth");
 425                 $(depth_td).text("d" + line.depth);
 426
 427                 var pv_td = document.createElement("td");
 428                 tr.appendChild(pv_td);
 429                 $(pv_td).addClass("pv");
 430                 $(pv_td).text(print_pv(line.pv_pretty, data.position.move_num, data.position.toplay, 10));
 431
 432                 tbl.append(tr);
 433         }
 434
 435         // Next update.
 436         setTimeout(function() { request_update(board); }, 100);
 437 }
 438
 439 var init = function() {
 440         // Create board.
 441         board = new ChessBoard('board', 'start');
 442
 443         request_update(board);
 444         $(window).resize(function() {
 445                 board.resize();
 446                 update_highlight();
 447                 redraw_arrows();
 448         });
 449 };
 450 $(document).ready(init);
 451
 452 })();