* @type {Number}
* @const
* @private */
-var SCRIPT_VERSION = 2015062103;
+var SCRIPT_VERSION = 2015062104;
+
+/**
+ * The current backend URL.
+ *
+ * @type {!string}
+ * @private
+ */
+var backend_url = "/analysis.pl";
/** @type {window.ChessBoard} @private */
var board = null;
*/
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,
/** @type {!string|undefined} @private */
var highlight_to = undefined;
-/** @type {?jQuery} @private */
+/** The HTML object of the move currently being highlighted (in red).
+ * @type {?jQuery}
+ * @private */
var highlighted_move = null;
/** @type {?number} @private */
* }} DisplayLine
*/
-/** @type {Array.<DisplayLine>}
+/** All PVs that we currently know of.
+ *
+ * Element 0 is history (or null if no history).
+ * Element 1 is current main PV.
+ * All remaining elements are refutation lines (multi-PV).
+ *
+ * @type {Array.<DisplayLine>}
* @private
*/
var display_lines = [];
/** @type {?number} @private */
var current_display_move = null;
+/**
+ * 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;
+
var supports_html5_storage = function() {
try {
return 'localStorage' in window && window['localStorage'] !== null;
}
var request_update = function() {
- $.ajax({
- url: "/analysis.pl?ims=" + ims + "&unique=" + unique
+ current_analysis_request_timer = null;
+
+ current_analysis_xhr = $.ajax({
+ url: backend_url + "?ims=" + ims + "&unique=" + unique
}).done(function(data, textstatus, xhr) {
sync_server_clock(xhr.getResponseHeader('Date'));
ims = xhr.getResponseHeader('X-RGLM');
update_num_viewers(num_viewers);
// Next update.
- setTimeout(function() { request_update(); }, 100);
- }).fail(function() {
- // Wait ten seconds, then try again.
- setTimeout(function() { request_update(); }, 10000);
+ 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 clear_arrows = function() {
for (var i = 0; i < arrows.length; ++i) {
if (arrows[i].svg) {
- arrows[i].svg.parentElement.removeChild(arrows[i].svg);
+ if (arrows[i].svg.parentElement) {
+ arrows[i].svg.parentElement.removeChild(arrows[i].svg);
+ }
delete arrows[i].svg;
}
}
var position_arrow = function(arrow) {
if (arrow.svg) {
- arrow.svg.parentElement.removeChild(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 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 || current_display_line_is_history) &&
highlight_from !== undefined && highlight_to !== undefined) {
}
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 (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] ];
}
}
/**
+ * Create a Chess.js board object, containing the given position plus the given moves,
+ * up to the given limit.
+ *
* @param {?string} fen
* @param {Array.<string>} moves
* @param {number} last_move
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");
+
+ 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);
+ }
+ 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;
+ }
+ }
+}
+
/**
* @param {Object} data
* @param {?Object} display_data
}
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;
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 (display_data) {
// Displaying some non-current position, pick out the last move
} else {
highlight_from = highlight_to = undefined;
}
- update_highlight();
+ update_board_highlight();
if (data['failed']) {
$("#score").text("No analysis for this move");
update_clock();
- // 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']);
update_historic_analysis();
update_displayed_line();
- update_highlight();
+ update_board_highlight();
redraw_arrows();
}
window['show_line'] = show_line;
var filename = "/history/move" + (current_display_move + 1) + "-" +
hiddenboard.fen().replace(/ /g, '_').replace(/\//g, '-') + ".json";
- $.ajax({
+ current_historic_xhr = $.ajax({
url: filename
}).done(function(data, textstatus, xhr) {
displayed_analysis_data = data;
update_board(current_analysis_data, displayed_analysis_data);
- }).fail(function() {
- displayed_analysis_data = {'failed': true};
- update_board(current_analysis_data, displayed_analysis_data);
+ }).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(current_analysis_data, displayed_analysis_data);
+ }
});
}
}
window['set_sound'] = set_sound;
+/**
+ * @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();
+ }
+
+ // 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;
+ }
+
+ // 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();
$(window).resize(function() {
board.resize();
update_sparkline(displayed_analysis_data || current_analysis_data);
- update_highlight();
+ update_board_highlight();
redraw_arrows();
});
$(window).keyup(function(event) {
prev_move();
}
});
+ window.addEventListener('hashchange', possibly_switch_game_from_hash, false);
};
$(document).ready(init);
projects / remoteglot / blobdiff