Unbreak promotion again.

[remoteglot] / www / js / remoteglot.js

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index 078aba6cdf674cda3840e2f16d4714b5c1ef7001..e7a0453fd90569488cb10a761a6ac7830e8967ab 100644 (file)
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -414,6 +414,9 @@ var print_pv = function(line_num, pretty_pv, move_num, toplay, opt_limit, opt_sh
                // the UI should be to expand the history.
                pv = '(<a class="move" href="javascript:collapse_history(false)">…</a>) ';
                i = pretty_pv.length - opt_limit;
+               if (i < 0) {
+                       i = 0;
+               }
                if (i % 2 == 1) {
                        ++i;
                }
@@ -455,7 +458,7 @@ 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));
@@ -749,7 +752,7 @@ var update_displayed_line = function() {
        $("#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>");
@@ -762,9 +765,32 @@ 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];
-               move = move.substr(0, 2) + "-" + move.substr(2, 2);
+               var source = move.substr(0, 2);
+               var target = move.substr(2, 2);
+               var promo = move.substr(4, 1);
+
+               // 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 != "") {
+                       pos[target] = pos[target].substr(0, 1) + promo.toUpperCase();
+                       hiddenboard.position(pos, false);
+               }
 
                // chessboard.js does not automatically move the rook on castling
                // (issue #51; marked as won't fix), so update it ourselves.