(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 = true;
+
+/** @type {boolean} @private */
+var truncate_display_history = true;
+
+/** @type {!string|undefined} @private */
var highlight_from = undefined;
+
+/** @type {!string|undefined} @private */
var highlight_to = undefined;
+
+/** @type {?jQuery} @private */
+var highlighted_move = null;
+
+/** @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>,
+ * line_num: number
+ * }} 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);
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
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, opt_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
+ * @param {boolean=} opt_showlast
+ */
+var add_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit, opt_showlast) {
display_lines.push({
start_fen: fen,
uci_pv: uci_pv,
- pretty_pv: pretty_pv
+ pretty_pv: pretty_pv,
+ line_number: display_lines.length
});
+ return print_pv(display_lines.length - 1, pretty_pv, move_num, toplay, opt_limit, opt_showlast);
+}
+/**
+ * @param {number} line_num
+ * @param {Array.<string>} pretty_pv
+ * @param {number} move_num
+ * @param {!string} toplay
+ * @param {number=} opt_limit
+ * @param {boolean=} opt_showlast
+ */
+var print_pv = function(line_num, pretty_pv, move_num, toplay, opt_limit, opt_showlast) {
var pv = '';
var i = 0;
- if (toplay == 'B') {
- var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
+ if (opt_limit && opt_showlast) {
+ // Truncate the PV at the beginning (instead of at the end).
+ // We assume here that toplay is 'W'. We also assume that if
+ // opt_showlast is set, then it is the history, and thus,
+ // the UI should be to expand the history.
+ pv = '(<a class="move" href="javascript:collapse_history(false)">…</a>) ';
+ i = pretty_pv.length - opt_limit;
+ if (i % 2 == 1) {
+ ++i;
+ }
+ move_num += i / 2;
+ } else if (toplay == 'B') {
+ var move = "<a class=\"move\" id=\"automove" + line_num + "-0\" href=\"javascript:show_line(" + line_num + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
pv = move_num + '. … ' + move;
toplay = 'W';
++i;
++move_num;
}
for ( ; i < pretty_pv.length; ++i) {
- var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
+ var move = "<a class=\"move\" id=\"automove" + line_num + "-" + i + "\" href=\"javascript:show_line(" + line_num + ", " + i + ");\">" + pretty_pv[i] + "</a>";
if (toplay == 'W') {
- if (i > opt_limit) {
+ if (i > opt_limit && !opt_showlast) {
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) {
- if (display_lines.length > 1) {
- display_lines = [ display_lines[0] ];
+var update_history = function() {
+ if (display_lines[0] === null) {
+ $("#history").html("No history");
+ } else if (truncate_display_history) {
+ $("#history").html(print_pv(0, display_lines[0].pretty_pv, 1, 'W', 8, true));
+ } else {
+ $("#history").html(
+ '(<a class="move" href="javascript:collapse_history(true)">collapse</a>) ' +
+ print_pv(0, display_lines[0].pretty_pv, 1, 'W'));
+ }
+}
+
+/**
+ * @param {!boolean} truncate_history
+ */
+var collapse_history = function(truncate_history) {
+ truncate_display_history = truncate_history;
+ update_history();
+}
+window['collapse_history'] = collapse_history;
+
+var update_refutation_lines = function() {
+ if (fen === null) {
+ return;
+ }
+ if (display_lines.length > 2) {
+ display_lines = [ display_lines[0], display_lines[1] ];
}
var tbl = $("#refutationlines");
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(add_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';
+ 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') {
$("#numviewers").text(num_viewers + " current viewers");
}
+ // The engine id.
+ if (data['id'] && data['id']['name'] !== null) {
+ $("#engineid").text(data['id']['name']);
+ }
+
// The score.
if (data['score'] !== null) {
$("#score").text(data['score']);
}
if (data['tbhits'] && data['tbhits'] > 0) {
if (data['tbhits'] == 1) {
- stats += ', one Nalimov hit';
+ stats += ', one Syzygy hit';
} else {
- stats += ', ' + data['tbhits'] + ' Nalimov hits';
+ stats += ', ' + thousands(data['tbhits']) + ' Syzygy hits';
}
}
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);
+ highlight_to = data['position']['last_move_uci'].substr(2, 2);
} else {
highlight_from = highlight_to = undefined;
}
update_highlight();
+ // Print the history.
+ if (data['position']['history']) {
+ add_pv('start', data['position']['history'], data['position']['pretty_history'], 1, 'W', 8, true);
+ } else {
+ display_lines.push(null);
+ }
+ update_history();
+
// 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(add_pv(data['position']['fen'], data['pv_uci'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay']));
// Update the PV arrow.
clear_arrows();
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)) ||
+ if ((i >= 2 && from != data['pv_uci'][i - 2].substr(2, 2)) ||
interfering_arrow(from, to)) {
break;
}
var alt_moves = find_nonstupid_moves(data, 30);
for (var i = 1; i < alt_moves.length && i < 3; ++i) {
create_arrow(alt_moves[i].substr(0, 2),
- alt_moves[i].substr(2, 4), '#f66', 1, 10);
+ alt_moves[i].substr(2, 2), '#f66', 1, 10);
}
}
if (nonstupid_moves.length > 0 && response !== undefined) {
create_arrow(response.substr(0, 2),
- response.substr(2, 4), '#66f', 6, 20);
+ response.substr(2, 2), '#66f', 6, 20);
}
}
move_num = data['position']['move_num'];
toplay = data['position']['toplay'];
refutation_lines = data['refutation_lines'];
- update_refutation_lines(board);
+ 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 {boolean} truncate_history
+ */
+var set_truncate_history = function(truncate_history) {
+ truncate_display_history = truncate_history;
+ update_refutation_lines();
+}
+window['set_truncate_history'] = set_truncate_history;
+
+/**
+ * @param {number} line_num
+ * @param {number} move_num
+ */
var show_line = function(line_num, move_num) {
if (line_num == -1) {
current_display_line = null;
window['show_line'] = show_line;
var prev_move = function() {
- --current_display_move;
+ if (current_display_move > -1) {
+ --current_display_move;
+ }
update_displayed_line();
}
window['prev_move'] = prev_move;
var next_move = function() {
- ++current_display_move;
+ if (current_display_line && current_display_move < current_display_line.pretty_pv.length - 1) {
+ ++current_display_move;
+ }
update_displayed_line();
}
-window['next_move'] = prev_move;
+window['next_move'] = next_move;
var update_displayed_line = function() {
+ if (highlighted_move !== null) {
+ highlighted_move.removeClass('highlight');
+ }
if (current_display_line === null) {
$("#linenav").hide();
$("#linemsg").show();
$("#linenav").show();
$("#linemsg").hide();
- if (current_display_move == 0) {
+ if (current_display_move <= 0) {
$("#prevmove").html("Previous");
} else {
$("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
hiddenboard.position(current_display_line.start_fen, false);
for (var i = 0; i <= current_display_move; ++i) {
var move = current_display_line.uci_pv[i];
- move = move.substr(0, 2) + "-" + move.substr(2, 4);
+ var promo = move.substr(4, 1);
+ move = move.substr(0, 2) + "-" + move.substr(2, 2);
hiddenboard.move(move, false);
+
+ // Do promotion if needed.
+ if (promo != "") {
+ var pos = hiddenboard.position();
+ var target = move.substr(3, 2);
+ pos[target] = pos[target].substr(0, 1) + promo.toUpperCase();
+ hiddenboard.position(pos, 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);
+ }
}
+
+ highlighted_move = $("#automove" + current_display_line.line_number + "-" + current_display_move);
+ highlighted_move.addClass('highlight');
+
board.position(hiddenboard.position());
}
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);