* @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;
/** @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) {
}
update_history();
+ // Games currently in progress, if any.
+ $("#games").text("");
+ if (current_data['games']) {
+ var games_div = document.getElementById('games');
+ for (var game_num = 0; game_num < current_data['games'].length; ++game_num) {
+ var game = current_data['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", "javascript:switch_backend('" + game['url'] + "')");
+ game_a.appendChild(game_name);
+ game_span.appendChild(game_a);
+ }
+ games_div.appendChild(game_span);
+ }
+ }
+
// 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
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']);
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();
projects / remoteglot / blobdiff