X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=www%2Fjs%2Fremoteglot.js;h=21a995eea87a4073c7a92062ab8964e069baf340;hp=80a5db9d9bb9696961c94002f90213ec24b077c0;hb=ed756fd94f3bb3e155402268c562016c842c4217;hpb=33bc30f3fd0026d8fae3107b5154bbc03f5f8673 diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js index 80a5db9..21a995e 100644 --- a/www/js/remoteglot.js +++ b/www/js/remoteglot.js @@ -1,49 +1,344 @@ +(function() { + +/** + * Version of this script. If the server returns a version larger than + * this, it is a sign we should reload to upgrade ourselves. + * + * @type {Number} + * @const + * @private */ +var SCRIPT_VERSION = 2016032000; + +/** + * The current backend URL. + * + * @type {!string} + * @private + */ +var backend_url = "/analysis.pl"; +var backend_hash_url = "/hash"; + +/** @type {window.ChessBoard} @private */ var board = null; -var hiddenboard = null; + +/** @type {boolean} @private */ +var board_is_animating = false; + +/** + * The most recent analysis data we have from the server + * (about the most recent position). + * + * @type {?Object} + * @private */ +var current_analysis_data = null; + +/** + * If we are displaying previous analysis or from hash, this is non-null, + * and will override most of current_analysis_data. + * + * @type {?Object} + * @private + */ +var displayed_analysis_data = null; + +/** + * Games currently in progress, if any. + * + * @type {?Array.<{ + * name: string, + * url: string, + * id: string, + * }>} + * @private + */ +var current_games = 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 = []; -var arrow_targets = []; + +/** @type {Array.>} */ var occupied_by_arrows = []; + +/** Currently displayed refutation lines (on-screen). + * Can either come from the current_analysis_data, displayed_analysis_data, + * or hash_refutation_lines. + */ var refutation_lines = []; + +/** Refutation lines from current hash probe. + * + * If non-null, will override refutation lines from the base position. + * Note that these are relative to display_fen, not base_fen. + */ +var hash_refutation_lines = null; + +/** @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; -var unique = Math.random(); -var fen = null; +/** The HTML object of the move currently being highlighted (in red). + * @type {?jQuery} + * @private */ +var highlighted_move = null; + +/** Currently suggested/recommended move when dragging. + * @type {?{from: !string, to: !string}} + * @private + */ +var recommended_move = null; + +/** If reverse-dragging (dragging from the destination square to the + * source square), the destination square. + * @type {?string} + * @private + */ +var reverse_dragging_from = null; + +/** @type {?number} @private */ +var unique = null; + +/** @type {boolean} @private */ +var enable_sound = false; + +/** + * Our best estimate of how many milliseconds we need to add to + * new Date() to get the true UTC time. Calibrated against the + * server clock. + * + * @type {?number} + * @private + */ +var client_clock_offset_ms = null; + +var clock_timer = null; + +/** The current position being analyzed, represented as a FEN string. + * Note that this is not necessarily the same as display_fen. + * @type {?string} + * @private + */ +var base_fen = null; + +/** The current position on the board, represented as a FEN string. + * Note that board.fen() does not contain e.g. who is to play. + * @type {?string} + * @private + */ +var display_fen = null; + +/** @typedef {{ + * start_fen: string, + * pretty_pv: Array., + * move_num: number, + * toplay: string, + * score: string, + * start_display_move_num: number + * }} DisplayLine + * + * "start_display_move_num" is the (half-)move number to start displaying the PV at. + * "score" is also evaluated at this point. + */ + +/** All PVs that we currently know of. + * + * Element 0 is history (or null if no history). + * Element 1 is current main PV, or explored line if nowhere else on the screen. + * All remaining elements are refutation lines (multi-PV). + * + * @type {Array.} + * @private + */ var display_lines = []; + +/** @type {?DisplayLine} @private */ var current_display_line = null; + +/** @type {boolean} @private */ +var current_display_line_is_history = false; + +/** @type {?number} @private */ var current_display_move = null; -var request_update = function(board) { - $.ajax({ - url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique - //url: "http://analysis.sesse.net:5000/analysis.pl?ims=" + ims + "&unique=" + unique +/** + * The current backend request to get main analysis (not history), if any, + * so that we can abort it. + * + * @type {?jqXHR} + * @private + */ +var current_analysis_xhr = null; + +/** + * The current timer to fire off a request to get main analysis (not history), + * if any, so that we can abort it. + * + * @type {?Number} + * @private + */ +var current_analysis_request_timer = null; + +/** + * The current backend request to get historic data, if any. + * + * @type {?jqXHR} + * @private + */ +var current_historic_xhr = null; + +/** + * The current backend request to get hash probes, if any, so that we can abort it. + * + * @type {?jqXHR} + * @private + */ +var current_hash_xhr = null; + +/** + * The current timer to display hash probe information (it could be waiting on the + * board to stop animating), if any, so that we can abort it. + * + * @type {?Number} + * @private + */ +var current_hash_display_timer = null; + +var supports_html5_storage = function() { + try { + return 'localStorage' in window && window['localStorage'] !== null; + } catch (e) { + return false; + } +} + +// Make the unique token persistent so people refreshing the page won't count twice. +// Of course, you can never fully protect against people deliberately wanting to spam. +var get_unique = function() { + var use_local_storage = supports_html5_storage(); + if (use_local_storage && localStorage['unique']) { + return localStorage['unique']; + } + var unique = Math.random(); + if (use_local_storage) { + localStorage['unique'] = unique; + } + return unique; +} + +var request_update = function() { + current_analysis_request_timer = null; + + current_analysis_xhr = $.ajax({ + url: backend_url + "?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); - }).fail(function() { - // Wait ten seconds, then try again. - setTimeout(function() { request_update(board); }, 10000); + sync_server_clock(xhr.getResponseHeader('Date')); + ims = xhr.getResponseHeader('X-RGLM'); + var num_viewers = xhr.getResponseHeader('X-RGNV'); + var new_data; + if (Array.isArray(data)) { + new_data = JSON.parse(JSON.stringify(current_analysis_data)); + JSON_delta.patch(new_data, data); + } else { + new_data = data; + } + + var minimum_version = xhr.getResponseHeader('X-RGMV'); + if (minimum_version && minimum_version > SCRIPT_VERSION) { + // Upgrade to latest version with a force-reload. + location.reload(true); + } + + possibly_play_sound(current_analysis_data, new_data); + current_analysis_data = new_data; + update_board(); + update_num_viewers(num_viewers); + + // Next update. + current_analysis_request_timer = setTimeout(function() { request_update(); }, 100); + }).fail(function(jqXHR, textStatus, errorThrown) { + if (textStatus === "abort") { + // Aborted because we are switching backends. Abandon and don't retry, + // because another one is already started for us. + } else { + // Backend error or similar. Wait ten seconds, then try again. + current_analysis_request_timer = setTimeout(function() { request_update(); }, 10000); + } }); } +var possibly_play_sound = function(old_data, new_data) { + if (!enable_sound) { + return; + } + if (old_data === null) { + return; + } + var ding = document.getElementById('ding'); + if (ding && ding.play) { + if (old_data['position'] && old_data['position']['fen'] && + new_data['position'] && new_data['position']['fen'] && + (old_data['position']['fen'] !== new_data['position']['fen'] || + old_data['position']['move_num'] !== new_data['position']['move_num'])) { + ding.play(); + } + } +} + +/** + * @type {!string} server_date_string + */ +var sync_server_clock = function(server_date_string) { + var server_time_ms = new Date(server_date_string).getTime(); + var client_time_ms = new Date().getTime(); + var estimated_offset_ms = server_time_ms - client_time_ms; + + // In order not to let the noise move us too much back and forth + // (the server only has one-second resolution anyway), we only + // change an existing skew if we are at least five seconds off. + if (client_clock_offset_ms === null || + Math.abs(estimated_offset_ms - client_clock_offset_ms) > 5000) { + client_clock_offset_ms = estimated_offset_ms; + } +} + var clear_arrows = function() { for (var i = 0; i < arrows.length; ++i) { - jsPlumb.detach(arrows[i].connection1); - jsPlumb.detach(arrows[i].connection2); + if (arrows[i].svg) { + if (arrows[i].svg.parentElement) { + arrows[i].svg.parentElement.removeChild(arrows[i].svg); + } + delete arrows[i].svg; + } } arrows = []; - for (var i = 0; i < arrow_targets.length; ++i) { - document.body.removeChild(arrow_targets[i]); - } - arrow_targets = []; - - occupied_by_arrows = []; + occupied_by_arrows = []; for (var y = 0; y < 8; ++y) { occupied_by_arrows.push([false, false, false, false, false, false, false, false]); } @@ -55,6 +350,9 @@ var redraw_arrows = function() { } } +/** @param {!number} x + * @return {!number} + */ var sign = function(x) { if (x > 0) { return 1; @@ -65,7 +363,11 @@ var sign = function(x) { } } -// 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); @@ -97,16 +399,65 @@ var interfering_arrow = function(from, to) { return false; } -var add_target = function() { - var elem = document.createElement("div"); - $(elem).addClass("window"); - elem.id = "target" + arrow_targets.length; - document.body.appendChild(elem); - arrow_targets.push(elem); - return elem.id; +/** Find a point along the coordinate system given by the given line, + * units forward from the start of the line, 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; + + var norm = 1.0 / Math.sqrt(dx * dx + dy * dy); + dx *= norm; + dy *= norm; + + var x = x1 + dx * t + dy * u; + var y = y1 + dy * t - dx * u; + return x + " " + y; +} + +/** Find a point along the coordinate system given by the given line, + * units forward from the end of the line, 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 norm = 1.0 / Math.sqrt(dx * dx + dy * dy); + dx *= norm; + dy *= norm; + + var x = x2 + dx * t + dy * u; + var y = y2 + dy * t - dx * u; + return x + " " + y; } - + var position_arrow = function(arrow) { + if (arrow.svg) { + if (arrow.svg.parentElement) { + arrow.svg.parentElement.removeChild(arrow.svg); + } + delete arrow.svg; + } + if (current_display_line !== null && !current_display_line_is_history) { + return; + } + + var pos = $(".square-a8").position(); + var zoom_factor = $("#board").width() / 400.0; var line_width = arrow.line_width * zoom_factor; var arrow_size = arrow.arrow_size * zoom_factor; @@ -117,73 +468,65 @@ var position_arrow = function(arrow) { var from_x = (arrow.from_col + 0.5)*square_width; var to_x = (arrow.to_col + 0.5)*square_width; - var dx = to_x - from_x; - var dy = to_y - from_y; - var len = Math.sqrt(dx * dx + dy * dy); - dx /= len; - dy /= len; - var pos = $(".square-a8").position(); - $("#" + arrow.s1).css({ top: pos.top + from_y + (0.5 * arrow_size) * dy, left: pos.left + from_x + (0.5 * arrow_size) * dx }); - $("#" + arrow.d1).css({ top: pos.top + to_y - (0.5 * arrow_size) * dy, left: pos.left + to_x - (0.5 * arrow_size) * dx }); - $("#" + arrow.s1v).css({ top: pos.top + from_y - 0 * dy, left: pos.left + from_x - 0 * dx }); - $("#" + arrow.d1v).css({ top: pos.top + to_y + 0 * dy, left: pos.left + to_x + 0 * dx }); - - if (arrow.connection1) { - jsPlumb.detach(arrow.connection1); - } - if (arrow.connection2) { - jsPlumb.detach(arrow.connection2); - } - if (current_display_line !== null) { - delete arrow.connection1; - delete arrow.connection2; - return; - } - arrow.connection1 = jsPlumb.connect({ - source: arrow.s1, - target: arrow.d1, - connector:["Straight"], - cssClass:"c1", - endpoint:"Blank", - endpointClass:"c1Endpoint", - anchor:"Continuous", - paintStyle:{ - lineWidth:line_width, - strokeStyle:arrow.fg_color, - outlineWidth:1, - outlineColor:"#666", - opacity:"60%" - } - }); - arrow.connection2 = jsPlumb.connect({ - source: arrow.s1v, - target: arrow.d1v, - connector:["Straight"], - cssClass:"vir", - endpoint:"Blank", - endpointClass:"c1Endpoint", - anchor:"Continuous", - paintStyle:{ - lineWidth:0, - strokeStyle:arrow.fg_color, - outlineWidth:0, - outlineColor:"#666", - }, - overlays : [ - ["Arrow", { - cssClass:"l1arrow", - location:1.0, - width: arrow_size, - length: arrow_size, - paintStyle: { - lineWidth:line_width, - strokeStyle:"#000", - }, - }] - ] - }); + var SVG_NS = "http://www.w3.org/2000/svg"; + var XHTML_NS = "http://www.w3.org/1999/xhtml"; + var svg = document.createElementNS(SVG_NS, "svg"); + svg.setAttribute("width", /** @type{number} */ ($("#board").width())); + svg.setAttribute("height", /** @type{number} */ ($("#board").height())); + svg.setAttribute("style", "position: absolute"); + svg.setAttribute("position", "absolute"); + svg.setAttribute("version", "1.1"); + svg.setAttribute("class", "c1"); + svg.setAttribute("xmlns", XHTML_NS); + + var x1 = from_x; + var y1 = from_y; + var x2 = to_x; + var y2 = to_y; + + // Draw the line. + var outline = document.createElementNS(SVG_NS, "path"); + outline.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0)); + outline.setAttribute("xmlns", XHTML_NS); + outline.setAttribute("stroke", "#666"); + outline.setAttribute("stroke-width", line_width + 2); + outline.setAttribute("fill", "none"); + svg.appendChild(outline); + + var path = document.createElementNS(SVG_NS, "path"); + path.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0)); + path.setAttribute("xmlns", XHTML_NS); + path.setAttribute("stroke", arrow.fg_color); + path.setAttribute("stroke-width", line_width); + path.setAttribute("fill", "none"); + svg.appendChild(path); + + // Then the arrow head. + var head = document.createElementNS(SVG_NS, "path"); + head.setAttribute("d", + "M " + point_from_end(x1, y1, x2, y2, 0, 0) + + " L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) + + " L " + point_from_end(x1, y1, x2, y2, -arrow_size * .623, 0.0) + + " L " + point_from_end(x1, y1, x2, y2, -arrow_size, arrow_size / 2) + + " L " + point_from_end(x1, y1, x2, y2, 0, 0)); + head.setAttribute("xmlns", XHTML_NS); + head.setAttribute("stroke", "#000"); + head.setAttribute("stroke-width", "1"); + head.setAttribute("fill", arrow.fg_color); + svg.appendChild(head); + + $(svg).css({ top: pos.top, left: pos.left, 'pointer-events': 'none' }); + document.body.appendChild(svg); + 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); @@ -192,16 +535,12 @@ var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_ // Create arrow. var arrow = { - s1: add_target(), - d1: add_target(), - s1v: add_target(), - d1v: add_target(), from_col: from_col, from_row: from_row, to_col: to_col, to_row: to_row, line_width: line_width, - arrow_size: arrow_size, + arrow_size: arrow_size, fg_color: fg_color }; @@ -209,41 +548,47 @@ var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_ arrows.push(arrow); } -var compare_by_sort_key = function(refutation_lines, toplay, a, b) { - var ska = refutation_lines[a].sort_key; - var skb = refutation_lines[b].sort_key; +// Note: invert is ignored. +var compare_by_sort_key = function(refutation_lines, invert, a, b) { + 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, toplay, a, b) { - var sa = parseInt(refutation_lines[b].score_sort_key); - var sb = parseInt(refutation_lines[a].score_sort_key); - if (toplay == 'B') { - return sb - sa; - } else { - return sa - sb; - } + +var compare_by_score = function(refutation_lines, invert, a, b) { + var sa = compute_score_sort_key(refutation_lines[b]['score'], invert); + var sb = compute_score_sort_key(refutation_lines[a]['score'], invert); + return sa - sb; } -// Fake multi-PV using the refutation lines. Find all “relevant” moves, -// sorted by quality, descending. -var find_nonstupid_moves = function(data, margin) { +/** + * 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. + * @param {boolean} margin Whether black is to play. + * @return {Array.} The UCI representation (e.g. e1g1) of all + * moves, in score order. + */ +var find_nonstupid_moves = function(data, margin, invert) { // 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 = compute_score_sort_key(data['refutation_lines'][move]['score'], invert); + 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 []; } } @@ -255,43 +600,101 @@ var find_nonstupid_moves = function(data, margin) { // 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 = compute_score_sort_key(data['refutation_lines'][move]['score'], invert); + 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'], data['position']['toplay'] === 'B', 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} start_fen + * @param {Array.} pretty_pv + * @param {number} move_num + * @param {!string} toplay + * @param {!string} score + * @param {number} start_display_move_num + * @param {number=} opt_limit + * @param {boolean=} opt_showlast + */ +var add_pv = function(start_fen, pretty_pv, move_num, toplay, score, start_display_move_num, opt_limit, opt_showlast) { display_lines.push({ - start_fen: fen, - uci_pv: uci_pv, - pretty_pv: pretty_pv + start_fen: start_fen, + pretty_pv: pretty_pv, + move_num: parseInt(move_num), + toplay: toplay, + score: score, + start_display_move_num: start_display_move_num }); + return print_pv(display_lines.length - 1, opt_limit, opt_showlast); +} + +/** + * @param {number} line_num + * @param {number=} opt_limit + * @param {boolean=} opt_showlast + */ +var print_pv = function(line_num, opt_limit, opt_showlast) { + var display_line = display_lines[line_num]; + var pretty_pv = display_line.pretty_pv; + var move_num = display_line.move_num; + var toplay = display_line.toplay; + + // Truncate PV at the start if needed. + var start_display_move_num = display_line.start_display_move_num; + if (start_display_move_num > 0) { + pretty_pv = pretty_pv.slice(start_display_move_num); + var to_add = start_display_move_num; + if (toplay === 'B') { + ++move_num; + toplay = 'W'; + --to_add; + } + if (to_add % 2 == 1) { + toplay = 'B'; + --to_add; + } + move_num += to_add / 2; + } var pv = ''; var i = 0; - if (toplay == 'B') { - var move = "" + pretty_pv[0] + ""; + if (opt_limit && opt_showlast && pretty_pv.length > opt_limit) { + // 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 = '(…) '; + i = pretty_pv.length - opt_limit; + if (i % 2 == 1) { + ++i; + } + move_num += i / 2; + } else if (toplay == 'B' && pretty_pv.length > 0) { + var move = "" + pretty_pv[0] + ""; pv = move_num + '. … ' + move; toplay = 'W'; - ++i; + ++i; + ++move_num; } - ++move_num; for ( ; i < pretty_pv.length; ++i) { - var move = "" + pretty_pv[i] + ""; + var move = "" + pretty_pv[i] + ""; if (toplay == 'W') { - if (i > limit) { + if (i > opt_limit && !opt_showlast) { return pv + ' (…)'; } if (pv != '') { @@ -308,28 +711,73 @@ var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, limit) { return pv; } -var update_highlight = function() { +/** Update the highlighted to/from squares on the board. + * Based on the global "highlight_from" and "highlight_to" variables. + */ +var update_board_highlight = function() { $("#board").find('.square-55d63').removeClass('nonuglyhighlight'); - if (current_display_line === null && highlight_from !== undefined && highlight_to !== undefined) { + if ((current_display_line === null || current_display_line_is_history) && + highlight_from !== undefined && highlight_to !== undefined) { $("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight'); $("#board").find('.square-' + highlight_to).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 || display_lines[0].pretty_pv.length == 0) { + $("#history").html("No history"); + } else if (truncate_display_history) { + $("#history").html(print_pv(0, 8, true)); + } else { + $("#history").html( + '(collapse) ' + + print_pv(0, 1, 'W')); } +} +/** + * @param {!boolean} truncate_history + */ +var collapse_history = function(truncate_history) { + truncate_display_history = truncate_history; + update_history(); +} +window['collapse_history'] = collapse_history; + +/** Update the HTML display of multi-PV from the global "refutation_lines". + * + * Also recreates the global "display_lines". + */ +var update_refutation_lines = function() { + if (base_fen === null) { + return; + } + if (display_lines.length > 2) { + // Truncate so that only the history and PV is left. + display_lines = [ display_lines[0], display_lines[1] ]; + } var tbl = $("#refutationlines"); tbl.empty(); - moves = []; + // Find out where the lines start from. + var base_line = []; + var start_display_move_num = 0; + if (hash_refutation_lines) { + base_line = current_display_line.pretty_pv.slice(0, current_display_move + 1); + start_display_move_num = base_line.length; + } + + var moves = []; for (var move in refutation_lines) { moves.push(move); } + + var invert = (toplay === 'B'); + if (current_display_line && current_display_move % 2 == 0) { + invert = !invert; + } var compare = sort_refutation_lines_by_score ? compare_by_score : compare_by_sort_key; - moves = moves.sort(function(a, b) { return compare(refutation_lines, toplay, a, b) }); + moves = moves.sort(function(a, b) { return compare(refutation_lines, invert, a, b) }); for (var i = 0; i < moves.length; ++i) { var line = refutation_lines[moves[i]]; @@ -338,141 +786,369 @@ var update_refutation_lines = function(board) { 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); - } else { - var move = "" + line.pretty_move + ""; + + if (line['pv_pretty'].length == 0) { + // Not found, so just make a one-move PV. + var move = "" + line['pretty_move'] + ""; $(move_td).html(move); + var score_td = document.createElement("td"); + + $(score_td).addClass("score"); + $(score_td).text("—"); + tr.appendChild(score_td); + + var depth_td = document.createElement("td"); + tr.appendChild(depth_td); + $(depth_td).addClass("depth"); + $(depth_td).text("—"); + + var pv_td = document.createElement("td"); + tr.appendChild(pv_td); + $(pv_td).addClass("pv"); + $(pv_td).html(add_pv(base_fen, base_line.concat([ line['pretty_move'] ]), move_num, toplay, line['score'], start_display_move_num)); + + tbl.append(tr); + continue; } + var move = "" + line['pretty_move'] + ""; + $(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(format_short_score(line['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(add_pv(base_fen, base_line.concat(line['pv_pretty']), move_num, toplay, line['score'], start_display_move_num, 10)); tbl.append(tr); } // Make one of the links clickable and the other nonclickable. if (sort_refutation_lines_by_score) { - $("#sortbyscore0").html("Move"); + $("#sortbyscore0").html("Move"); $("#sortbyscore1").html("Score"); } else { $("#sortbyscore0").html("Move"); - $("#sortbyscore1").html("Score"); + $("#sortbyscore1").html("Score"); } + + // Update the move highlight, as we've rewritten all the HTML. + update_move_highlight(); } -var update_board = function(board, data, num_viewers) { - display_lines = []; +/** + * Create a Chess.js board object, containing the given position plus the given moves, + * up to the given limit. + * + * @param {?string} fen + * @param {Array.} moves + * @param {number} last_move + */ +var chess_from = function(fen, moves, last_move) { + var hiddenboard = new Chess(); + if (fen !== null) { + hiddenboard.load(fen); + } + for (var i = 0; i <= last_move; ++i) { + if (moves[i] === '0-0') { + hiddenboard.move('O-O'); + } else if (moves[i] === '0-0-0') { + hiddenboard.move('O-O-O'); + } else { + hiddenboard.move(moves[i]); + } + } + return hiddenboard; +} + +var update_game_list = function(games) { + $("#games").text(""); + if (games === null) { + return; + } + + var games_div = document.getElementById('games'); + for (var game_num = 0; game_num < games.length; ++game_num) { + var game = games[game_num]; + var game_span = document.createElement("span"); + game_span.setAttribute("class", "game"); - // The headline. - var headline = 'Analysis'; - if (data.position.last_move !== 'none') { - headline += ' after ' + data.position.move_num + '. '; - if (data.position.toplay == 'W') { - headline += '… '; + var game_name = document.createTextNode(game['name']); + if (game['url'] === backend_url) { + game_span.appendChild(game_name); + } else { + var game_a = document.createElement("a"); + game_a.setAttribute("href", "#" + game['id']); + game_a.appendChild(game_name); + game_span.appendChild(game_a); } - headline += data.position.last_move; + games_div.appendChild(game_span); + } +} + +/** + * Try to find a running game that matches with the current hash, + * and switch to it if we're not already displaying it. + */ +var possibly_switch_game_from_hash = function() { + if (current_games === null) { + return; + } + + var hash = window.location.hash.replace(/^#/,''); + for (var i = 0; i < current_games.length; ++i) { + if (current_games[i]['id'] === hash) { + if (backend_url !== current_games[i]['url']) { + switch_backend(current_games[i]['url']); + } + return; + } + } +} + +/** Update all the HTML on the page, based on current global state. + */ +var update_board = function() { + var data = displayed_analysis_data || current_analysis_data; + var current_data = current_analysis_data; // Convenience alias. + + display_lines = []; + + // Print the history. This is pretty much the only thing that's + // unconditionally taken from current_data (we're not interested in + // historic history). + if (current_data['position']['pretty_history']) { + add_pv('start', current_data['position']['pretty_history'], 1, 'W', null, 0, 8, true); + } else { + display_lines.push(null); } + update_history(); + // Games currently in progress, if any. + if (current_data['games']) { + current_games = current_data['games']; + possibly_switch_game_from_hash(); + update_game_list(current_data['games']); + } else { + current_games = null; + update_game_list(null); + } + + // The headline. Names are always fetched from current_data; + // the rest can depend a bit. + var headline; + if (current_data && + current_data['position']['player_w'] && current_data['position']['player_b']) { + headline = current_data['position']['player_w'] + '–' + + current_data['position']['player_b'] + ', analysis'; + } else { + headline = 'Analysis'; + } + + // Credits, where applicable. Note that we don't want the footer to change a lot + // when e.g. viewing history, so if any of these changed during the game, + // use the current one still. + if (current_data['using_lomonosov']) { + $("#lomonosov").show(); + } else { + $("#lomonosov").hide(); + } + + // Credits: The engine name/version. + if (current_data['engine'] && current_data['engine']['name'] !== null) { + $("#engineid").text(current_data['engine']['name']); + } + + // Credits: The engine URL. + if (current_data['engine'] && current_data['engine']['url']) { + $("#engineid").attr("href", current_data['engine']['url']); + } else { + $("#engineid").removeAttr("href"); + } + + // Credits: Engine details. + if (current_data['engine'] && current_data['engine']['details']) { + $("#enginedetails").text(" (" + current_data['engine']['details'] + ")"); + } else { + $("#enginedetails").text(""); + } + + // Credits: Move source, possibly with URL. + if (current_data['move_source'] && current_data['move_source_url']) { + $("#movesource").text("Moves provided by "); + var movesource_a = document.createElement("a"); + movesource_a.setAttribute("href", current_data['move_source_url']); + var movesource_text = document.createTextNode(current_data['move_source']); + movesource_a.appendChild(movesource_text); + var movesource_period = document.createTextNode("."); + document.getElementById("movesource").appendChild(movesource_a); + document.getElementById("movesource").appendChild(movesource_period); + } else if (current_data['move_source']) { + $("#movesource").text("Moves provided by " + current_data['move_source'] + "."); + } else { + $("#movesource").text(""); + } + + var last_move; + if (displayed_analysis_data) { + // Displaying some non-current position, pick out the last move + // from the history. This will work even if the fetch failed. + last_move = format_halfmove_with_number( + current_display_line.pretty_pv[current_display_move], + current_display_move + 1); + headline += ' after ' + last_move; + } else if (data['position']['last_move'] !== 'none') { + last_move = format_move_with_number( + data['position']['last_move'], + data['position']['move_num'], + data['position']['toplay'] == 'W'); + headline += ' after ' + last_move; + } else { + last_move = null; + } $("#headline").text(headline); - if (num_viewers === null) { - $("#numviewers").text(""); - } else if (num_viewers == 1) { - $("#numviewers").text("You are the only current viewer"); + // The contains a very brief headline. + var title_elems = []; + if (data['score']) { + title_elems.push(format_short_score(data['score']).replace(/^ /, "")); + } + if (last_move !== null) { + title_elems.push(last_move); + } + + if (title_elems.length != 0) { + document.title = '(' + title_elems.join(', ') + ') analysis.sesse.net'; } else { - $("#numviewers").text(num_viewers + " current viewers"); + document.title = 'analysis.sesse.net'; } + // The last move (shown by highlighting the from and to squares). + if (data['position'] && data['position']['last_move_uci']) { + highlight_from = data['position']['last_move_uci'].substr(0, 2); + highlight_to = data['position']['last_move_uci'].substr(2, 2); + } else if (current_display_line_is_history && current_display_move >= 0) { + // We don't have historic analysis for this position, but we + // can reconstruct what the last move was by just replaying + // from the start. + var hiddenboard = chess_from(null, current_display_line.pretty_pv, current_display_move); + var moves = hiddenboard.history({ verbose: true }); + var last_move = moves.pop(); + highlight_from = last_move.from; + highlight_to = last_move.to; + } else { + highlight_from = highlight_to = undefined; + } + update_board_highlight(); + + if (data['failed']) { + $("#score").text("No analysis for this move"); + $("#pvtitle").text("PV:"); + $("#pv").empty(); + $("#searchstats").html(" "); + $("#refutationlines").empty(); + $("#whiteclock").empty(); + $("#blackclock").empty(); + refutation_lines = []; + update_refutation_lines(); + clear_arrows(); + update_displayed_line(); + update_move_highlight(); + return; + } + + update_clock(); + // The score. - if (data.score !== null) { - $("#score").text(data.score); + if (current_display_line) { + if (current_display_line.score) { + $("#score").text(format_long_score(current_display_line.score)); + } else { + $("#score").text("No score for this move"); + } + } else if (data['score']) { + $("#score").text(format_long_score(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.tbhits && data.tbhits > 0) { - if (data.tbhits == 1) { - stats += ', one Nalimov hit'; + if (data['searchstats']) { + $("#searchstats").html(data['searchstats']); + } else if (data['tablebase'] == 1) { + $("#searchstats").text("Tablebase result"); + } else 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 Syzygy hit'; } else { - stats += ', ' + data.tbhits + ' Nalimov hits'; + stats += ', ' + thousands(data['tbhits']) + ' Syzygy hits'; } } - $("#searchstats").text(stats); + } else { + $("#searchstats").text(""); } // Update the board itself. - fen = data.position.fen; + base_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); - } 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)); + $("#pvtitle").text("PV:"); + $("#pv").html(add_pv(data['position']['fen'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay'], data['score'], 0)); // 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, 2)) || interfering_arrow(from, to)) { break; } create_arrow(from, to, '#f66', 6, 20); } - var alt_moves = find_nonstupid_moves(data, 30); + var alt_moves = find_nonstupid_moves(data, 30, data['position']['toplay'] === 'B'); 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); } } // See if all semi-reasonable moves have only one possible response. - if (data.pv_uci.length >= 2) { - var nonstupid_moves = find_nonstupid_moves(data, 300); - var response = data.pv_uci[1]; + if (data['pv_uci'].length >= 2) { + var nonstupid_moves = find_nonstupid_moves(data, 300, data['position']['toplay'] === 'B'); + 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; @@ -482,90 +1158,922 @@ var update_board = function(board, data, num_viewers) { 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); } } // 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); + base_fen = data['position']['fen']; + move_num = parseInt(data['position']['move_num']); + toplay = data['position']['toplay']; + refutation_lines = hash_refutation_lines || data['refutation_lines']; + update_refutation_lines(); + + // Update the sparkline last, since its size depends on how everything else reflowed. + update_sparkline(data); +} + +var update_sparkline = function(data) { + if (data && data['score_history']) { + var first_move_num = undefined; + for (var halfmove_num in data['score_history']) { + halfmove_num = parseInt(halfmove_num); + if (first_move_num === undefined || halfmove_num < first_move_num) { + first_move_num = halfmove_num; + } + } + if (first_move_num !== undefined) { + var last_move_num = data['position']['move_num'] * 2 - 3; + if (data['position']['toplay'] === 'B') { + ++last_move_num; + } + + // Possibly truncate some moves if we don't have enough width. + // FIXME: Sometimes width() for #scorecontainer (and by extent, + // #scoresparkcontainer) on Chrome for mobile seems to start off + // at something very small, and then suddenly snap back into place. + // Figure out why. + var max_moves = Math.floor($("#scoresparkcontainer").width() / 5) - 5; + if (last_move_num - first_move_num > max_moves) { + first_move_num = last_move_num - max_moves; + } + + var min_score = -100; + var max_score = 100; + var last_score = null; + var scores = []; + for (var halfmove_num = first_move_num; halfmove_num <= last_move_num; ++halfmove_num) { + if (data['score_history'][halfmove_num]) { + var score = compute_plot_score(data['score_history'][halfmove_num]); + last_score = score; + if (score < min_score) min_score = score; + if (score > max_score) max_score = score; + } + scores.push(last_score); + } + if (data['score']) { + scores.push(compute_plot_score(data['score'])); + } + // FIXME: at some widths, calling sparkline() seems to push + // #scorecontainer under the board. + $("#scorespark").sparkline(scores, { + type: 'bar', + zeroColor: 'gray', + chartRangeMin: min_score, + chartRangeMax: max_score, + tooltipFormatter: function(sparkline, options, fields) { + return format_tooltip(data, fields[0].offset + first_move_num); + } + }); + } else { + $("#scorespark").text(""); + } + } else { + $("#scorespark").text(""); + } +} - // Next update. - setTimeout(function() { request_update(board); }, 100); +/** + * @param {number} num_viewers + */ +var update_num_viewers = function(num_viewers) { + if (num_viewers === null) { + $("#numviewers").text(""); + } else if (num_viewers == 1) { + $("#numviewers").text("You are the only current viewer"); + } else { + $("#numviewers").text(num_viewers + " current viewers"); + } } +var update_clock = function() { + clearTimeout(clock_timer); + + var data = displayed_analysis_data || current_analysis_data; + if (data['position']) { + var result = data['position']['result']; + if (result === '1-0') { + $("#whiteclock").text("1"); + $("#blackclock").text("0"); + $("#whiteclock").removeClass("running-clock"); + $("#blackclock").removeClass("running-clock"); + return; + } + if (result === '1/2-1/2') { + $("#whiteclock").text("1/2"); + $("#blackclock").text("1/2"); + $("#whiteclock").removeClass("running-clock"); + $("#blackclock").removeClass("running-clock"); + return; + } + if (result === '0-1') { + $("#whiteclock").text("0"); + $("#blackclock").text("1"); + $("#whiteclock").removeClass("running-clock"); + $("#blackclock").removeClass("running-clock"); + return; + } + } + + var white_clock_ms = null; + var black_clock_ms = null; + var show_seconds = false; + + // Static clocks. + if (data['position'] && + data['position']['white_clock'] && + data['position']['black_clock']) { + white_clock_ms = data['position']['white_clock'] * 1000; + black_clock_ms = data['position']['black_clock'] * 1000; + } + + // Dynamic clock (only one, obviously). + var color; + if (data['position']['white_clock_target']) { + color = "white"; + $("#whiteclock").addClass("running-clock"); + $("#blackclock").removeClass("running-clock"); + } else if (data['position']['black_clock_target']) { + color = "black"; + $("#whiteclock").removeClass("running-clock"); + $("#blackclock").addClass("running-clock"); + } else { + $("#whiteclock").removeClass("running-clock"); + $("#blackclock").removeClass("running-clock"); + } + var remaining_ms; + if (color) { + var now = new Date().getTime() + client_clock_offset_ms; + remaining_ms = data['position'][color + '_clock_target'] * 1000 - now; + if (color === "white") { + white_clock_ms = remaining_ms; + } else { + black_clock_ms = remaining_ms; + } + } + + if (white_clock_ms === null || black_clock_ms === null) { + $("#whiteclock").empty(); + $("#blackclock").empty(); + return; + } + + // If either player has ten minutes or less left, add the second counters. + var show_seconds = (white_clock_ms < 60 * 10 * 1000 || black_clock_ms < 60 * 10 * 1000); + + if (color) { + // See when the clock will change next, and update right after that. + var next_update_ms; + if (show_seconds) { + next_update_ms = remaining_ms % 1000 + 100; + } else { + next_update_ms = remaining_ms % 60000 + 100; + } + clock_timer = setTimeout(update_clock, next_update_ms); + } + + $("#whiteclock").text(format_clock(white_clock_ms, show_seconds)); + $("#blackclock").text(format_clock(black_clock_ms, show_seconds)); +} + +/** + * @param {Number} remaining_ms + * @param {boolean} show_seconds + */ +var format_clock = function(remaining_ms, show_seconds) { + if (remaining_ms <= 0) { + if (show_seconds) { + return "00:00:00"; + } else { + return "00:00"; + } + } + + var remaining = Math.floor(remaining_ms / 1000); + var seconds = remaining % 60; + remaining = (remaining - seconds) / 60; + var minutes = remaining % 60; + remaining = (remaining - minutes) / 60; + var hours = remaining; + if (show_seconds) { + return format_2d(hours) + ":" + format_2d(minutes) + ":" + format_2d(seconds); + } else { + return format_2d(hours) + ":" + format_2d(minutes); + } +} + +/** + * @param {Number} x + */ +var format_2d = function(x) { + if (x >= 10) { + return x; + } else { + return "0" + x; + } +} + +/** + * @param {string} move + * @param {Number} move_num + * @param {boolean} white_to_play + */ +var format_move_with_number = function(move, move_num, white_to_play) { + var ret; + if (white_to_play) { + ret = (move_num - 1) + '… '; + } else { + ret = move_num + '. '; + } + ret += move; + return ret; +} + +/** + * @param {string} move + * @param {Number} halfmove_num + */ +var format_halfmove_with_number = function(move, halfmove_num) { + return format_move_with_number( + move, + Math.floor(halfmove_num / 2) + 1, + halfmove_num % 2 == 0); +} + +/** + * @param {Object} data + * @param {Number} halfmove_num + */ +var format_tooltip = function(data, halfmove_num) { + if (data['score_history'][halfmove_num] || + halfmove_num === data['position']['pretty_history'].length) { + var move; + var short_score; + if (halfmove_num === data['position']['pretty_history'].length) { + move = data['position']['last_move']; + short_score = format_short_score(data['score']); + } else { + move = data['position']['pretty_history'][halfmove_num]; + short_score = format_short_score(data['score_history'][halfmove_num]); + } + var move_with_number = format_halfmove_with_number(move, halfmove_num); + + return "After " + move_with_number + ": " + short_score; + } else { + for (var i = halfmove_num; i --> 0; ) { + if (data['score_history'][i]) { + var move = data['position']['pretty_history'][i]; + return "[Analysis kept from " + format_halfmove_with_number(move, i) + "]"; + } + } + } +} + +/** + * @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); + if (supports_html5_storage()) { + localStorage['sort_refutation_lines_by_score'] = sort_by_score ? 1 : 0; + } + 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; current_display_move = null; + hash_refutation_lines = null; + if (displayed_analysis_data) { + // TODO: Support exiting to history position if we are in an + // analysis line of a history position. + displayed_analysis_data = null; + } + update_board(); + return; } else { - current_display_line = display_lines[line_num]; - current_display_move = move_num; + current_display_line = jQuery.extend({}, display_lines[line_num]); // Shallow clone. + current_display_move = move_num + current_display_line.start_display_move_num; } + current_display_line_is_history = (line_num == 0); + + update_historic_analysis(); update_displayed_line(); - update_highlight(); + update_board_highlight(); + update_move_highlight(); redraw_arrows(); } +window['show_line'] = show_line; var prev_move = function() { - --current_display_move; + if (current_display_line && + current_display_move >= current_display_line.start_display_move_num) { + --current_display_move; + } + update_historic_analysis(); update_displayed_line(); + update_move_highlight(); } +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_historic_analysis(); update_displayed_line(); + update_move_highlight(); +} +window['next_move'] = next_move; + +var update_historic_analysis = function() { + if (!current_display_line_is_history) { + return; + } + if (current_display_move == current_display_line.pretty_pv.length - 1) { + displayed_analysis_data = null; + update_board(); + } + + // Fetch old analysis for this line if it exists. + var hiddenboard = chess_from(null, current_display_line.pretty_pv, current_display_move); + var filename = "/history/move" + (current_display_move + 1) + "-" + + hiddenboard.fen().replace(/ /g, '_').replace(/\//g, '-') + ".json"; + + current_historic_xhr = $.ajax({ + url: filename + }).done(function(data, textstatus, xhr) { + displayed_analysis_data = data; + update_board(); + }).fail(function(jqXHR, textStatus, errorThrown) { + if (textStatus === "abort") { + // Aborted because we are switching backends. Don't do anything; + // we will already have been cleared. + } else { + displayed_analysis_data = {'failed': true}; + update_board(); + } + }); +} + +/** + * @param {string} fen + */ +var update_imbalance = function(fen) { + var hiddenboard = new Chess(fen); + var imbalance = {'k': 0, 'q': 0, 'r': 0, 'b': 0, 'n': 0, 'p': 0}; + for (var row = 0; row < 8; ++row) { + for (var col = 0; col < 8; ++col) { + var col_text = String.fromCharCode('a1'.charCodeAt(0) + col); + var row_text = String.fromCharCode('a1'.charCodeAt(1) + row); + var square = col_text + row_text; + var contents = hiddenboard.get(square); + if (contents !== null) { + if (contents.color === 'w') { + ++imbalance[contents.type]; + } else { + --imbalance[contents.type]; + } + } + } + } + var white_imbalance = ''; + var black_imbalance = ''; + for (var piece in imbalance) { + for (var i = 0; i < imbalance[piece]; ++i) { + white_imbalance += '<img src="img/chesspieces/wikipedia/w' + piece.toUpperCase() + '.png" alt="" style="width: 15px;height: 15px;">'; + } + for (var i = 0; i < -imbalance[piece]; ++i) { + black_imbalance += '<img src="img/chesspieces/wikipedia/b' + piece.toUpperCase() + '.png" alt="" style="width: 15px;height: 15px;">'; + } + } + $('#whiteimbalance').html(white_imbalance); + $('#blackimbalance').html(black_imbalance); +} + +/** Mark the currently selected move in red. + * Also replaces the PV with the current displayed line if it's not shown + * anywhere else on the screen. + */ +var update_move_highlight = function() { + if (highlighted_move !== null) { + highlighted_move.removeClass('highlight'); + } + if (current_display_line) { + var display_line_num = find_display_line_matching_num(); + if (display_line_num === null) { + // Replace the PV with the (complete) line. + $("#pvtitle").text("Exploring:"); + current_display_line.start_display_move_num = 0; + display_lines.push(current_display_line); + $("#pv").html(print_pv(display_lines.length - 1)); + display_line_num = display_lines.length - 1; + } + + highlighted_move = $("#automove" + display_line_num + "-" + (current_display_move - current_display_line.start_display_move_num)); + highlighted_move.addClass('highlight'); + } +} + +/** + * See if the current displayed line is identical to any of the ones + * we have on screen. (It might not be if e.g. the analysis reloaded + * since we started looking.) + * + * @return {?number} + */ +var find_display_line_matching_num = function() { + for (var i = 0; i < display_lines.length; ++i) { + var line = display_lines[i]; + if (line.start_display_move_num > 0) continue; + if (current_display_line.start_fen !== line.start_fen) continue; + if (current_display_line.pretty_pv.length !== line.pretty_pv.length) continue; + var ok = true; + for (var j = 0; j < line.pretty_pv.length; ++j) { + if (current_display_line.pretty_pv[j] !== line.pretty_pv[j]) { + ok = false; + break; + } + } + if (ok) { + return i; + } + } + return null; } var update_displayed_line = function() { if (current_display_line === null) { $("#linenav").hide(); $("#linemsg").show(); - board.position(fen); + display_fen = base_fen; + board.position(base_fen); + update_imbalance(base_fen); return; } $("#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>"); } - if (current_display_move == current_display_line.uci_pv.length - 1) { + if (current_display_move == current_display_line.pretty_pv.length - 1) { $("#nextmove").html("Next"); } else { $("#nextmove").html("<a href=\"javascript:next_move();\">Next</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); - hiddenboard.move(move, false); + var hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pretty_pv, current_display_move); + display_fen = hiddenboard.fen(); + board_is_animating = true; + var old_fen = board.fen(); + board.position(hiddenboard.fen()); + if (board.fen() === old_fen) { + board_is_animating = false; + } else if (!current_display_line_is_history) { + // Fire off a hash request, since we're now off the main position + // and it just changed. + explore_hash(display_fen); + } + update_imbalance(hiddenboard.fen()); +} + +/** + * @param {boolean} param_enable_sound + */ +var set_sound = function(param_enable_sound) { + enable_sound = param_enable_sound; + if (enable_sound) { + $("#soundon").html("<strong>On</strong>"); + $("#soundoff").html("<a href=\"javascript:set_sound(false)\">Off</a>"); + + // Seemingly at least Firefox prefers MP3 over Opus; tell it otherwise, + // and also preload the file since the user has selected audio. + var ding = document.getElementById('ding'); + if (ding && ding.canPlayType && ding.canPlayType('audio/ogg; codecs="opus"') === 'probably') { + ding.src = 'ding.opus'; + ding.load(); + } + } else { + $("#soundon").html("<a href=\"javascript:set_sound(true)\">On</a>"); + $("#soundoff").html("<strong>Off</strong>"); + } + if (supports_html5_storage()) { + localStorage['enable_sound'] = enable_sound ? 1 : 0; + } +} +window['set_sound'] = set_sound; + +/** Send off a hash probe request to the backend. + * @param {string} fen + */ +var explore_hash = function(fen) { + // If we already have a backend response going, abort it. + if (current_hash_xhr) { + current_hash_xhr.abort(); + } + if (current_hash_display_timer) { + clearTimeout(current_hash_display_timer); + current_hash_display_timer = null; + } + $("#refutationlines").empty(); + current_hash_xhr = $.ajax({ + url: backend_hash_url + "?fen=" + fen + }).done(function(data, textstatus, xhr) { + show_explore_hash_results(data, fen); + }); +} + +/** Process the JSON response from a hash probe request. + * @param {!Object} data + * @param {string} fen + */ +var show_explore_hash_results = function(data, fen) { + if (board_is_animating) { + // Updating while the animation is still going causes + // the animation to jerk. This is pretty crude, but it will do. + current_hash_display_timer = setTimeout(function() { show_explore_hash_results(data, fen); }, 100); + return; + } + current_hash_display_timer = null; + hash_refutation_lines = data['lines']; + update_board(); +} + +// almost all of this stuff comes from the chessboard.js example page +var onDragStart = function(source, piece, position, orientation) { + var pseudogame = new Chess(display_fen); + if (pseudogame.game_over() === true || + (pseudogame.turn() === 'w' && piece.search(/^b/) !== -1) || + (pseudogame.turn() === 'b' && piece.search(/^w/) !== -1)) { + return false; + } + + recommended_move = get_best_move(pseudogame, source, null, pseudogame.turn() === 'b'); + if (recommended_move) { + var squareEl = $('#board .square-' + recommended_move.to); + squareEl.addClass('highlight1-32417'); + } + return true; +} + +var mousedownSquare = function(e) { + reverse_dragging_from = null; + var square = $(this).attr('data-square'); + + var pseudogame = new Chess(display_fen); + if (pseudogame.game_over() === true) { + return; + } + + // If the square is empty, or has a piece of the side not to move, + // we handle it. If not, normal piece dragging will take it. + var position = board.position(); + if (!position.hasOwnProperty(square) || + (pseudogame.turn() === 'w' && position[square].search(/^b/) !== -1) || + (pseudogame.turn() === 'b' && position[square].search(/^w/) !== -1)) { + reverse_dragging_from = square; + recommended_move = get_best_move(pseudogame, null, square, pseudogame.turn() === 'b'); + if (recommended_move) { + var squareEl = $('#board .square-' + recommended_move.from); + squareEl.addClass('highlight1-32417'); + squareEl = $('#board .square-' + recommended_move.to); + squareEl.addClass('highlight1-32417'); + } } - board.position(hiddenboard.position()); } +var mouseupSquare = function(e) { + if (reverse_dragging_from === null) { + return; + } + var source = $(this).attr('data-square'); + var target = reverse_dragging_from; + reverse_dragging_from = null; + if (onDrop(source, target) !== 'snapback') { + onSnapEnd(source, target); + } + $("#board").find('.square-55d63').removeClass('highlight1-32417'); +} + +var get_best_move = function(game, source, target, invert) { + var moves = game.moves({ verbose: true }); + if (source !== null) { + moves = moves.filter(function(move) { return move.from == source; }); + } + if (target !== null) { + moves = moves.filter(function(move) { return move.to == target; }); + } + if (moves.length == 0) { + return null; + } + if (moves.length == 1) { + return moves[0]; + } + + // More than one move. Use the display lines (if we have them) + // to disambiguate; otherwise, we have no information. + var move_hash = {}; + for (var i = 0; i < moves.length; ++i) { + move_hash[moves[i].san] = moves[i]; + } + + // History and PV take priority over the display lines. + for (var i = 0; i < 2; ++i) { + var line = display_lines[i]; + var first_move = line.pretty_pv[line.start_display_move_num]; + if (move_hash[first_move]) { + return move_hash[first_move]; + } + } + + var best_move = null; + var best_move_score = null; + + for (var move in refutation_lines) { + var line = refutation_lines[move]; + if (!line['score']) { + continue; + } + var first_move = line['pv_pretty'][0]; + if (move_hash[first_move]) { + var score = compute_score_sort_key(line['score'], invert); + if (best_move_score === null || score > best_move_score) { + best_move = move_hash[first_move]; + best_move_score = score; + } + } + } + return best_move; +} + +var onDrop = function(source, target) { + if (source === target) { + if (recommended_move === null) { + return 'snapback'; + } else { + // Accept the move. It will be changed in onSnapEnd. + return; + } + } else { + // Suggestion not asked for. + recommended_move = null; + } + + // see if the move is legal + var pseudogame = new Chess(display_fen); + var move = pseudogame.move({ + from: source, + to: target, + promotion: 'q' // NOTE: always promote to a queen for example simplicity + }); + + // illegal move + if (move === null) return 'snapback'; +} + +var onSnapEnd = function(source, target) { + if (source === target && recommended_move !== null) { + source = recommended_move.from; + target = recommended_move.to; + } + recommended_move = null; + var pseudogame = new Chess(display_fen); + var move = pseudogame.move({ + from: source, + to: target, + promotion: 'q' // NOTE: always promote to a queen for example simplicity + }); + + if (current_display_line && + current_display_move < current_display_line.pretty_pv.length - 1 && + current_display_line.pretty_pv[current_display_move + 1] === move.san) { + next_move(); + return; + } + + // Walk down the displayed lines until we find one that starts with + // this move, then select that. Note that this gives us a good priority + // order (history first, then PV, then multi-PV lines). + for (var i = 0; i < display_lines.length; ++i) { + var line = display_lines[i]; + if (line.pretty_pv[line.start_display_move_num] === move.san) { + show_line(i, 0); + return; + } + } + + // Shouldn't really be here if we have hash probes, but there's really + // nothing we can do. +} +// End of dragging-related code. + +var pad = function(val, num_digits) { + var s = val.toString(); + while (s.length < num_digits) { + s = " " + s; + } + return s; +} + +var fmt_cp = function(v) { + if (v === 0) { + return "0.00"; + } else if (v > 0) { + return "+" + (v / 100).toFixed(2); + } else { + v = -v; + return "-" + (v / 100).toFixed(2); + } +} + +var format_short_score = function(score) { + if (!score) { + return "???"; + } + if (score[0] === 'm') { + if (score[2]) { // Is a bound. + return score[2] + "\u00a0M" + pad(score[1], 3); + } else { + return "M" + pad(score[1], 3); + } + } else if (score[0] === 'd') { + return "TB draw"; + } else if (score[0] === 'cp') { + if (score[2]) { // Is a bound. + return score[2] + "\u00a0" + fmt_cp(score[1]); + } else { + return pad(fmt_cp(score[1]), 5); + } + } + return null; +} + +var format_long_score = function(score) { + if (score[0] === 'm') { + if (score[1] > 0) { + return "White mates in " + score[1]; + } else { + return "Black mates in " + (-score[1]); + } + } else if (score[0] === 'd') { + return "Theoretical draw"; + } else if (score[0] === 'cp') { + return "Score: " + format_short_score(score); + } + return null; +} + +var compute_plot_score = function(score) { + if (score[0] === 'm') { + if (score[1] > 0) { + return 500; + } else { + return -500; + } + } else if (score[0] === 'd') { + return 0; + } else if (score[0] === 'cp') { + if (score[1] > 500) { + return 500; + } else if (score[1] < -500) { + return -500; + } else { + return score[1]; + } + } + return null; +} + +/** + * @param score The score digest tuple. + * @param {boolean} invert Whether black is to play. + * @return {number} + */ +var compute_score_sort_key = function(score, invert) { + var s; + if (!score) { + return -10000000; + } + if (score[0] === 'm') { + if (score[1] > 0) { + // White mates. + s = 99999 - score[1]; + } else { + // Black mates (note the double negative for score[1]). + s = -99999 - score[1]; + } + if (invert) s = -s; + return s; + } else if (score[0] === 'd') { + return 0; + } else if (score[0] === 'cp') { + return invert ? -score[1] : score[1]; + } + return null; +} + +/** + * @param {string} new_backend_url + */ +var switch_backend = function(new_backend_url) { + // Stop looking at historic data. + current_display_line = null; + current_display_move = null; + displayed_analysis_data = null; + if (current_historic_xhr) { + current_historic_xhr.abort(); + } + + // If we already have a backend response going, abort it. + if (current_analysis_xhr) { + current_analysis_xhr.abort(); + } + if (current_hash_xhr) { + current_hash_xhr.abort(); + } + + // Otherwise, we should have a timer going to start a new one. + // Kill that, too. + if (current_analysis_request_timer) { + clearTimeout(current_analysis_request_timer); + current_analysis_request_timer = null; + } + if (current_hash_display_timer) { + clearTimeout(current_hash_display_timer); + current_hash_display_timer = null; + } + + // Request an immediate fetch with the new backend. + backend_url = new_backend_url; + current_analysis_data = null; + ims = 0; + request_update(); +} +window['switch_backend'] = switch_backend; + var init = function() { + unique = get_unique(); + + // Load settings from HTML5 local storage if available. + if (supports_html5_storage() && localStorage['enable_sound']) { + set_sound(parseInt(localStorage['enable_sound'])); + } else { + set_sound(false); + } + if (supports_html5_storage() && localStorage['sort_refutation_lines_by_score']) { + sort_refutation_lines_by_score = parseInt(localStorage['sort_refutation_lines_by_score']); + } else { + sort_refutation_lines_by_score = true; + } + // Create board. - board = new ChessBoard('board', 'start'); - hiddenboard = new ChessBoard('hiddenboard', 'start'); + board = new window.ChessBoard('board', { + onMoveEnd: function() { board_is_animating = false; }, + + draggable: true, + onDragStart: onDragStart, + onDrop: onDrop, + onSnapEnd: onSnapEnd + }); + $("#board").on('mousedown', '.square-55d63', mousedownSquare); + $("#board").on('mouseup', '.square-55d63', mouseupSquare); - request_update(board); + request_update(); $(window).resize(function() { board.resize(); - update_highlight(); + update_sparkline(displayed_analysis_data || current_analysis_data); + update_board_highlight(); redraw_arrows(); }); + $(window).keyup(function(event) { + if (event.which == 39) { + next_move(); + } else if (event.which == 37) { + prev_move(); + } + }); + window.addEventListener('hashchange', possibly_switch_game_from_hash, false); }; $(document).ready(init); + +})();