Support showing the history of the game.

[remoteglot] / www / js / remoteglot.js

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index e74187307250a5870b7d11a3ed71536796e1c2a1..c103716d52bd7aaa314c5fb360f27ba2601a5e63 100644 (file)
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -34,7 +34,7 @@ var toplay = 'W';
 var ims = 0;
 
 /** @type {boolean} @private */
-var sort_refutation_lines_by_score = false;
+var sort_refutation_lines_by_score = true;
 
 /** @type {!string|undefined} @private */
 var highlight_from = undefined;
@@ -377,8 +377,9 @@ var thousands = function(x) {
  * @param {number} move_num
  * @param {!string} toplay
  * @param {number=} opt_limit
+ * @param {boolean=} opt_showlast
  */
-var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
+var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit, opt_showlast) {
        display_lines.push({
                start_fen: fen,
                uci_pv: uci_pv,
@@ -387,7 +388,16 @@ var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
 
        var pv = '';
        var i = 0;
-       if (toplay == 'B') {
+       if (opt_limit && opt_showlast) {
+               // Truncate the PV at the beginning (instead of at the end).
+               // We assume here that toplay is 'W'.
+               pv = '(…) ';
+               i = pretty_pv.length - opt_limit;
+               if (i % 2 == 1) {
+                       ++i;
+               }
+               move_num += i / 2;
+       } else if (toplay == 'B') {
                var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + 0 + ");\">" + pretty_pv[0] + "</a>";
                pv = move_num + '. … ' + move;
                toplay = 'W';
@@ -398,7 +408,7 @@ var print_pv = function(fen, uci_pv, pretty_pv, move_num, toplay, opt_limit) {
                var move = "<a class=\"move\" href=\"javascript:show_line(" + (display_lines.length - 1) + ", " + i + ");\">" + pretty_pv[i] + "</a>";
 
                if (toplay == 'W') {
-                       if (i > opt_limit) {
+                       if (i > opt_limit && !opt_showlast) {
                                return pv + ' (…)';
                        }
                        if (pv != '') {
@@ -491,7 +501,13 @@ var update_board = function(data, num_viewers) {
        display_lines = [];
 
        // The headline.
-       var headline = 'Analysis';
+       var headline;
+       if (data['position']['player_w'] && data['position']['player_b']) {
+               headline = data['position']['player_w'] + '–' +
+                       data['position']['player_b'] + ', analysis';
+       } else {
+               headline = 'Analysis';
+       }
        if (data['position']['last_move'] !== 'none') {
                headline += ' after '
                if (data['position']['toplay'] == 'W') {
@@ -512,6 +528,11 @@ var update_board = function(data, num_viewers) {
                $("#numviewers").text(num_viewers + " current viewers");
        }
 
+       // 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']);
@@ -546,6 +567,13 @@ var update_board = function(data, num_viewers) {
        }
        update_highlight();
 
+       // Print the history.
+       if (data['position']['history']) {
+               $("#history").html(print_pv('start', data['position']['history'], data['position']['pretty_history'], 1, 'W', 8, true));
+       } else {
+               $("#history").html("No history");
+       }
+
        // Print the PV.
        $("#pv").html(print_pv(data['position']['fen'], data['pv_uci'], data['pv_pretty'], data['position']['move_num'], data['position']['toplay']));
 
@@ -640,13 +668,17 @@ var show_line = function(line_num, move_num) {
 window['show_line'] = show_line;
 
 var prev_move = function() {
-       --current_display_move;
+       if (current_display_move > -1) {
+               --current_display_move;
+       }
        update_displayed_line();
 }
 window['prev_move'] = prev_move;
 
 var next_move = function() {
-       ++current_display_move;
+       if (current_display_line && current_display_move < current_display_line.pretty_pv.length - 1) {
+               ++current_display_move;
+       }
        update_displayed_line();
 }
 window['next_move'] = next_move;
@@ -678,6 +710,18 @@ var update_displayed_line = function() {
                var move = current_display_line.uci_pv[i];
                move = move.substr(0, 2) + "-" + move.substr(2, 4);
                hiddenboard.move(move, false);
+
+               // chessboard.js does not automatically move the rook on castling
+               // (issue #51; marked as won't fix), so update it ourselves.
+               if (move == "e1-g1" && hiddenboard.position().g1 == "wK") {  // white O-O
+                       hiddenboard.move("h1-f1", false);
+               } else if (move == "e1-c1" && hiddenboard.position().c1 == "wK") {  // white O-O-O
+                       hiddenboard.move("a1-d1", false);
+               } else if (move == "e8-g8" && hiddenboard.position().g8 == "bK") {  // black O-O
+                       hiddenboard.move("h8-f8", false);
+               } else if (move == "e8-c8" && hiddenboard.position().c8 == "bK") {  // black O-O-O
+                       hiddenboard.move("a8-d8", false);
+               }
        }
        board.position(hiddenboard.position());
 }
@@ -693,6 +737,13 @@ var init = function() {
                update_highlight();
                redraw_arrows();
        });
+       $(window).keyup(function(event) {
+               if (event.which == 39) {
+                       next_move();
+               } else if (event.which == 37) {
+                       prev_move();
+               }
+       });
 };
 $(document).ready(init);