X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=www%2Fjs%2Fremoteglot.js;h=3bff1ffa4d1c22ae489a5b8c698196cec2f522ac;hp=a5cdc232a61ce3a6cfa2b90508411b467b4e6202;hb=6f6ae45314e4f9876ab4fa9b9ba50e0c6a5e8371;hpb=bf646866821723c84ac275cab2314a43aed20d64

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index a5cdc23..3bff1ff 100644
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -48,8 +48,8 @@ var highlight_to = undefined;
 /** @type {?jQuery} @private */
 var highlighted_move = null;
 
-/** @type {!number} @private */
-var unique = Math.random();
+/** @type {?number} @private */
+var unique = null;
 
 /** The current position on the board, represented as a FEN string.
  * @type {?string}
@@ -76,6 +76,28 @@ var current_display_line = null;
 /** @type {?number} @private */
 var current_display_move = 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() {
 	$.ajax({
 		url: "http://analysis.sesse.net/analysis.pl?ims=" + ims + "&unique=" + unique
@@ -407,7 +429,7 @@ var add_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit, opt_s
 var print_pv = function(line_num, pretty_pv, move_num, toplay, opt_limit, opt_showlast) {
 	var pv = '';
 	var i = 0;
-	if (opt_limit && opt_showlast) {
+	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,
@@ -455,7 +477,7 @@ var update_highlight = function() {
 }
 
 var update_history = function() {
-	if (display_lines[0] === null) {
+	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, display_lines[0].pretty_pv, 1, 'W', 8, true));
@@ -579,9 +601,16 @@ var update_board = function(data, num_viewers) {
 	if (data['score'] !== null) {
 		$("#score").text(data['score']);
 	}
+	if (data['short_score'] !== undefined && data['short_score'] !== null) {
+		document.title = '(' + data['short_score'] + ') analysis.sesse.net';
+	} else {
+		document.title = 'analysis.sesse.net';
+	}
 
 	// The search stats.
-	if (data['nodes'] && data['nps'] && data['depth']) {
+	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)';
@@ -595,6 +624,8 @@ var update_board = function(data, num_viewers) {
 		}
 
 		$("#searchstats").text(stats);
+	} else {
+		$("#searchstats").text("");
 	}
 
 	// Update the board itself.
@@ -762,15 +793,29 @@ var update_displayed_line = function() {
 
 	hiddenboard.position(current_display_line.start_fen, false);
 	for (var i = 0; i <= current_display_move; ++i) {
+		var pos = hiddenboard.position();
 		var move = current_display_line.uci_pv[i];
+		var source = move.substr(0, 2);
+		var target = move.substr(2, 2);
 		var promo = move.substr(4, 1);
-		move = move.substr(0, 2) + "-" + move.substr(2, 2);
+
+		// Check if we need to do en passant.
+		var piece = pos[source];
+		if (piece == "wP" || piece == "bP") {
+			if (source.substr(0, 1) != target.substr(0, 1) &&
+			    pos[target] === undefined) {
+				var ep_square = target.substr(0, 1) + source.substr(1, 1);
+				delete pos[ep_square];
+				hiddenboard.position(pos, false);
+			}
+		}
+
+		move = source + "-" + target;
 		hiddenboard.move(move, false);
+		pos = hiddenboard.position();
 
 		// 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);
 		}
@@ -795,6 +840,8 @@ var update_displayed_line = function() {
 }
 
 var init = function() {
+	unique = get_unique();
+
 	// Create board.
 	board = new window.ChessBoard('board', 'start');
 	hiddenboard = new window.ChessBoard('hiddenboard', 'start');