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