Fix (null) in <title>.

[remoteglot] / www / js / remoteglot.js

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index a5cdc232a61ce3a6cfa2b90508411b467b4e6202..3bff1ffa4d1c22ae489a5b8c698196cec2f522ac 100644 (file)
--- 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');