X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=www%2Fjs%2Fremoteglot.js;h=e7a0453fd90569488cb10a761a6ac7830e8967ab;hp=078aba6cdf674cda3840e2f16d4714b5c1ef7001;hb=c17cb0c030ad2b4eb8493fbbc6aba34b68afacb6;hpb=2d0b748876fdf5ab3216cda6e1d511a3c7d788c7

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index 078aba6..e7a0453 100644
--- 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.