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