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

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