+(function() {
+
+/** @type {window.ChessBoard} @private */
var board = null;
+
+/** @type {window.ChessBoard} @private */
var hiddenboard = null;
+
+/** @type {Array.<{
+ * from_col: number,
+ * from_row: number,
+ * to_col: number,
+ * to_row: number,
+ * line_width: number,
+ * arrow_size: number,
+ * fg_color: string
+ * }>}
+ * @private
+ */
var arrows = [];
+
+/** @type {Array.<Array.<boolean>>} */
var occupied_by_arrows = [];
+
var refutation_lines = [];
+
+/** @type {!number} @private */
var move_num = 1;
+
+/** @type {!string} @private */
var toplay = 'W';
+
+/** @type {number} @private */
var ims = 0;
-var sort_refutation_lines_by_score = 0;
+
+/** @type {boolean} @private */
+var sort_refutation_lines_by_score = false;
+
+/** @type {!string|undefined} @private */
var highlight_from = undefined;
+
+/** @type {!string|undefined} @private */
var highlight_to = undefined;
+
+/** @type {!number} @private */
var unique = Math.random();
+/** The current position on the board, represented as a FEN string.
+ * @type {?string}
+ * @private
+ */
var fen = null;
+
+/** @typedef {{
+ * start_fen: string,
+ * uci_pv: Array.<string>,
+ * pretty_pv: Array.<string>
+ * }} DisplayLine
+ */
+
+/** @type {Array.<DisplayLine>}
+ * @private
+ */
var display_lines = [];
+
+/** @type {?DisplayLine} @private */
var current_display_line = null;
+
+/** @type {?number} @private */
var current_display_move = null;
-var request_update = function(board) {
+var request_update = function() {
$.ajax({
url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
//url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique
}).done(function(data, textstatus, xhr) {
ims = xhr.getResponseHeader('X-Remoteglot-Last-Modified');
var num_viewers = xhr.getResponseHeader('X-Remoteglot-Num-Viewers');
- update_board(board, data, num_viewers);
+ update_board(data, num_viewers);
}).fail(function() {
// Wait ten seconds, then try again.
- setTimeout(function() { request_update(board); }, 10000);
+ setTimeout(function() { request_update(); }, 10000);
});
}
}
}
+/** @param {!number} x
+ * @return {!number}
+ */
var sign = function(x) {
if (x > 0) {
return 1;
}
}
-// See if drawing this arrow on the board would cause unduly amount of confusion.
+/** See if drawing this arrow on the board would cause unduly amount of confusion.
+ * @param {!string} from The square the arrow is from (e.g. e4).
+ * @param {!string} to The square the arrow is to (e.g. e4).
+ * @return {boolean}
+ */
var interfering_arrow = function(from, to) {
var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
return false;
}
+/** Find a point along the coordinate system given by the given line,
+ * <t> units forward from the start of the line, <u> units to the right of it.
+ * @param {!number} x1
+ * @param {!number} x2
+ * @param {!number} y1
+ * @param {!number} y2
+ * @param {!number} t
+ * @param {!number} u
+ * @return {!string} The point in "x y" form, suitable for SVG paths.
+ */
var point_from_start = function(x1, y1, x2, y2, t, u) {
var dx = x2 - x1;
var dy = y2 - y1;
return x + " " + y;
}
+/** Find a point along the coordinate system given by the given line,
+ * <t> units forward from the end of the line, <u> units to the right of it.
+ * @param {!number} x1
+ * @param {!number} x2
+ * @param {!number} y1
+ * @param {!number} y2
+ * @param {!number} t
+ * @param {!number} u
+ * @return {!string} The point in "x y" form, suitable for SVG paths.
+ */
var point_from_end = function(x1, y1, x2, y2, t, u) {
var dx = x2 - x1;
var dy = y2 - y1;
var SVG_NS = "http://www.w3.org/2000/svg";
var XHTML_NS = "http://www.w3.org/1999/xhtml";
var svg = document.createElementNS(SVG_NS, "svg");
- svg.setAttribute("width", $("#board").width());
- svg.setAttribute("height", $("#board").height());
+ svg.setAttribute("width", /** @type{number} */ ($("#board").width()));
+ svg.setAttribute("height", /** @type{number} */ ($("#board").height()));
svg.setAttribute("style", "position: absolute");
svg.setAttribute("position", "absolute");
svg.setAttribute("version", "1.1");
head.setAttribute("xmlns", XHTML_NS);
head.setAttribute("stroke", "#000");
head.setAttribute("stroke-width", "1");
- head.setAttribute("fill", "#f66");
+ head.setAttribute("fill", arrow.fg_color);
svg.appendChild(head);
$(svg).css({ top: pos.top, left: pos.left });
arrow.svg = svg;
}
+/**
+ * @param {!string} from_square
+ * @param {!string} to_square
+ * @param {!string} fg_color
+ * @param {number} line_width
+ * @param {number} arrow_size
+ */
var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
}
var compare_by_sort_key = function(refutation_lines, a, b) {
- var ska = refutation_lines[a].sort_key;
- var skb = refutation_lines[b].sort_key;
+ var ska = refutation_lines[a]['sort_key'];
+ var skb = refutation_lines[b]['sort_key'];
if (ska < skb) return -1;
if (ska > skb) return 1;
return 0;
};
var compare_by_score = function(refutation_lines, a, b) {
- var sa = parseInt(refutation_lines[b].score_sort_key);
- var sb = parseInt(refutation_lines[a].score_sort_key);
+ var sa = parseInt(refutation_lines[b]['score_sort_key'], 10);
+ var sb = parseInt(refutation_lines[a]['score_sort_key'], 10);
return sa - sb;
}
-// Fake multi-PV using the refutation lines. Find all “relevant” moves,
-// sorted by quality, descending.
+/**
+ * Fake multi-PV using the refutation lines. Find all “relevant” moves,
+ * sorted by quality, descending.
+ *
+ * @param {!Object} data
+ * @param {number} margin The maximum number of centipawns worse than the
+ * best move can be and still be included.
+ * @return {Array.<string>} The UCI representation (e.g. e1g1) of all
+ * moves, in score order.
+ */
var find_nonstupid_moves = function(data, margin) {
// First of all, if there are any moves that are more than 0.5 ahead of
// the primary move, the refutation lines are probably bunk, so just
// kill them all.
var best_score = undefined;
var pv_score = undefined;
- for (var move in data.refutation_lines) {
- var score = parseInt(data.refutation_lines[move].score_sort_key);
- if (move == data.pv_uci[0]) {
+ for (var move in data['refutation_lines']) {
+ var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
+ if (move == data['pv_uci'][0]) {
pv_score = score;
}
if (best_score === undefined || score > best_score) {
best_score = score;
}
- if (!(data.refutation_lines[move].depth >= 8)) {
+ if (!(data['refutation_lines'][move]['depth'] >= 8)) {
return [];
}
}
// Now find all moves that are within “margin” of the best score.
// The PV move will always be first.
var moves = [];
- for (var move in data.refutation_lines) {
- var score = parseInt(data.refutation_lines[move].score_sort_key);
- if (move != data.pv_uci[0] && best_score - score <= margin) {
+ for (var move in data['refutation_lines']) {
+ var score = parseInt(data['refutation_lines'][move]['score_sort_key'], 10);
+ if (move != data['pv_uci'][0] && best_score - score <= margin) {
moves.push(move);
}
}
- moves = moves.sort(function(a, b) { return compare_by_score(data.refutation_lines, a, b) });
- moves.unshift(data.pv_uci[0]);
+ moves = moves.sort(function(a, b) { return compare_by_score(data['refutation_lines'], a, b) });
+ moves.unshift(data['pv_uci'][0]);
return moves;
}
+/**
+ * @param {number} x
+ * @return {!string}
+ */
var thousands = function(x) {
return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
}
-var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, limit) {
+/**
+ * @param {!string} fen
+ * @param {Array.<string>} uci_pv
+ * @param {Array.<string>} pretty_pv
+ * @param {number} move_num
+ * @param {!string} toplay
+ * @param {number=} opt_limit
+ */
+var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
display_lines.push({
start_fen: fen,
uci_pv: uci_pv,
var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
if (toplay == 'W') {
- if (i > limit) {
+ if (i > opt_limit) {
return pv + ' (…)';
}
if (pv != '') {
return pv;
}
-var update_highlight = function() {
+var update_highlight = function() {
$("#board").find('.square-55d63').removeClass('nonuglyhighlight');
if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) {
$("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
}
}
-var update_refutation_lines = function(board) {
+var update_refutation_lines = function() {
+ if (fen === null) {
+ return;
+ }
if (display_lines.length > 1) {
display_lines = [ display_lines[0] ];
}
var move_td = document.createElement("td");
tr.appendChild(move_td);
$(move_td).addClass("move");
- if (line.pv_uci.length == 0) {
- $(move_td).text(line.pretty_move);
+ if (line['pv_uci'].length == 0) {
+ $(move_td).text(line['pretty_move']);
} else {
- var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line.pretty_move + "</a>";
+ var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['pretty_move'] + "</a>";
$(move_td).html(move);
}
var score_td = document.createElement("td");
tr.appendChild(score_td);
$(score_td).addClass("score");
- $(score_td).text(line.pretty_score);
+ $(score_td).text(line['pretty_score']);
var depth_td = document.createElement("td");
tr.appendChild(depth_td);
$(depth_td).addClass("depth");
- $(depth_td).text("d" + line.depth);
+ $(depth_td).text("d" + line['depth']);
var pv_td = document.createElement("td");
tr.appendChild(pv_td);
$(pv_td).addClass("pv");
- $(pv_td).html(print_pv(fen, line.pv_uci, line.pv_pretty, move_num, toplay, 10));
+ $(pv_td).html(print_pv(fen, line['pv_uci'], line['pv_pretty'], move_num, toplay, 10));
tbl.append(tr);
}
// Make one of the links clickable and the other nonclickable.
if (sort_refutation_lines_by_score) {
- $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(0)\">Move</a>");
+ $("#sortbyscore0").html("<a href=\"javascript:resort_refutation_lines(false)\">Move</a>");
$("#sortbyscore1").html("<strong>Score</strong>");
} else {
$("#sortbyscore0").html("<strong>Move</strong>");
- $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(1)\">Score</a>");
+ $("#sortbyscore1").html("<a href=\"javascript:resort_refutation_lines(true)\">Score</a>");
}
}
-var update_board = function(board, data, num_viewers) {
+/**
+ * @param {Object} data
+ * @param {number} num_viewers
+ */
+var update_board = function(data, num_viewers) {
display_lines = [];
// The headline.
- var headline = 'Analysis';
- if (data.position.last_move !== 'none') {
+ var headline;
+ if (data['position']['player_w'] && data['position']['player_b']) {
+ headline = data['position']['player_w'] + '–' +
+ data['position']['player_b'] + ', analysis';
+ } else {
+ headline = 'Analysis';
+ }
+ if (data['position']['last_move'] !== 'none') {
headline += ' after '
- if (data.position.toplay == 'W') {
- headline += (data.position.move_num-1) + '… ';
+ if (data['position']['toplay'] == 'W') {
+ headline += (data['position']['move_num']-1) + '… ';
} else {
- headline += data.position.move_num + '. ';
+ headline += data['position']['move_num'] + '. ';
}
- headline += data.position.last_move;
+ headline += data['position']['last_move'];
}
$("#headline").text(headline);
}
// The score.
- if (data.score !== null) {
- $("#score").text(data.score);
+ if (data['score'] !== null) {
+ $("#score").text(data['score']);
}
// The search stats.
- if (data.nodes && data.nps && data.depth) {
- var stats = thousands(data.nodes) + ' nodes, ' + thousands(data.nps) + ' nodes/sec, depth ' + data.depth + ' ply';
- if (data.seldepth) {
- stats += ' (' + data.seldepth + ' selective)';
+ if (data['nodes'] && data['nps'] && data['depth']) {
+ var stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
+ if (data['seldepth']) {
+ stats += ' (' + data['seldepth'] + ' selective)';
}
- if (data.tbhits && data.tbhits > 0) {
- if (data.tbhits == 1) {
- stats += ', one Nalimov hit';
+ if (data['tbhits'] && data['tbhits'] > 0) {
+ if (data['tbhits'] == 1) {
+ stats += ', one Syzygy hit';
} else {
- stats += ', ' + data.tbhits + ' Nalimov hits';
+ stats += ', ' + thousands(data['tbhits']) + ' Syzygy hits';
}
}
}
// Update the board itself.
- fen = data.position.fen;
+ fen = data['position']['fen'];
update_displayed_line();
- if (data.position.last_move_uci) {
- highlight_from = data.position.last_move_uci.substr(0, 2);
- highlight_to = data.position.last_move_uci.substr(2, 4);
+ if (data['position']['last_move_uci']) {
+ highlight_from = data['position']['last_move_uci'].substr(0, 2);
+ highlight_to = data['position']['last_move_uci'].substr(2, 4);
} else {
highlight_from = highlight_to = undefined;
}
update_highlight();
// Print the PV.
- $("#pv").html(print_pv(data.position.fen, data.pv_uci, data.pv_pretty, data.position.move_num, data.position.toplay));
+ $("#pv").html(print_pv(data['position']['fen'], data['pv_uci'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay']));
// Update the PV arrow.
clear_arrows();
- if (data.pv_uci.length >= 1) {
+ if (data['pv_uci'].length >= 1) {
// draw a continuation arrow as long as it's the same piece
- for (var i = 0; i < data.pv_uci.length; i += 2) {
- var from = data.pv_uci[i].substr(0, 2);
- var to = data.pv_uci[i].substr(2,4);
- if ((i >= 2 && from != data.pv_uci[i - 2].substr(2, 4)) ||
+ for (var i = 0; i < data['pv_uci'].length; i += 2) {
+ var from = data['pv_uci'][i].substr(0, 2);
+ var to = data['pv_uci'][i].substr(2,4);
+ if ((i >= 2 && from != data['pv_uci'][i - 2].substr(2, 4)) ||
interfering_arrow(from, to)) {
break;
}
}
// See if all semi-reasonable moves have only one possible response.
- if (data.pv_uci.length >= 2) {
+ if (data['pv_uci'].length >= 2) {
var nonstupid_moves = find_nonstupid_moves(data, 300);
- var response = data.pv_uci[1];
+ var response = data['pv_uci'][1];
for (var i = 0; i < nonstupid_moves.length; ++i) {
- if (nonstupid_moves[i] == data.pv_uci[0]) {
+ if (nonstupid_moves[i] == data['pv_uci'][0]) {
// ignore the PV move for refutation lines.
continue;
}
- if (!data.refutation_lines ||
- !data.refutation_lines[nonstupid_moves[i]] ||
- !data.refutation_lines[nonstupid_moves[i]].pv_uci ||
- data.refutation_lines[nonstupid_moves[i]].pv_uci.length < 1) {
+ if (!data['refutation_lines'] ||
+ !data['refutation_lines'][nonstupid_moves[i]] ||
+ !data['refutation_lines'][nonstupid_moves[i]]['pv_uci'] ||
+ data['refutation_lines'][nonstupid_moves[i]]['pv_uci'].length < 1) {
// Incomplete PV, abort.
response = undefined;
break;
}
- var this_response = data.refutation_lines[nonstupid_moves[i]].pv_uci[1];
+ var this_response = data['refutation_lines'][nonstupid_moves[i]]['pv_uci'][1];
if (response !== this_response) {
// Different response depending on lines, abort.
response = undefined;
}
// Update the refutation lines.
- fen = data.position.fen;
- move_num = data.position.move_num;
- toplay = data.position.toplay;
- refutation_lines = data.refutation_lines;
- update_refutation_lines(board);
+ fen = data['position']['fen'];
+ move_num = data['position']['move_num'];
+ toplay = data['position']['toplay'];
+ refutation_lines = data['refutation_lines'];
+ update_refutation_lines();
// Next update.
- setTimeout(function() { request_update(board); }, 100);
+ setTimeout(function() { request_update(); }, 100);
}
+/**
+ * @param {boolean} sort_by_score
+ */
var resort_refutation_lines = function(sort_by_score) {
sort_refutation_lines_by_score = sort_by_score;
- update_refutation_lines(board);
+ update_refutation_lines();
}
+window['resort_refutation_lines'] = resort_refutation_lines;
+/**
+ * @param {number} line_num
+ * @param {number} move_num
+ */
var show_line = function(line_num, move_num) {
if (line_num == -1) {
current_display_line = null;
update_highlight();
redraw_arrows();
}
+window['show_line'] = show_line;
var prev_move = function() {
--current_display_move;
update_displayed_line();
}
+window['prev_move'] = prev_move;
var next_move = function() {
++current_display_move;
update_displayed_line();
}
+window['next_move'] = next_move;
var update_displayed_line = function() {
if (current_display_line === null) {
var move = current_display_line.uci_pv[i];
move = move.substr(0, 2) + "-" + move.substr(2, 4);
hiddenboard.move(move, false);
+
+ // chessboard.js does not automatically move the rook on castling
+ // (issue #51; marked as won't fix), so update it ourselves.
+ if (move == "e1-g1" && hiddenboard.position().g1 == "wK") { // white O-O
+ hiddenboard.move("h1-f1", false);
+ } else if (move == "e1-c1" && hiddenboard.position().c1 == "wK") { // white O-O-O
+ hiddenboard.move("a1-d1", false);
+ } else if (move == "e8-g8" && hiddenboard.position().g8 == "bK") { // black O-O
+ hiddenboard.move("h8-f8", false);
+ } else if (move == "e8-c8" && hiddenboard.position().c8 == "bK") { // black O-O-O
+ hiddenboard.move("a8-d8", false);
+ }
}
board.position(hiddenboard.position());
}
var init = function() {
// Create board.
- board = new ChessBoard('board', 'start');
- hiddenboard = new ChessBoard('hiddenboard', 'start');
+ board = new window.ChessBoard('board', 'start');
+ hiddenboard = new window.ChessBoard('hiddenboard', 'start');
- request_update(board);
+ request_update();
$(window).resize(function() {
board.resize();
update_highlight();
redraw_arrows();
});
+ $(window).keyup(function(event) {
+ if (event.which == 39) {
+ next_move();
+ } else if (event.which == 37) {
+ prev_move();
+ }
+ });
};
$(document).ready(init);
+
+})();