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pgn4web.js
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/*
* pgn4web javascript chessboard
* copyright (C) 2009-2017 Paolo Casaschi
* see README file and http://pgn4web.casaschi.net
* for credits, license and more details
*/
"use strict";
var pgn4web_version = '3.03';
var pgn4web_project_url = "http://pgn4web.casaschi.net";
var pgn4web_project_author = "Paolo Casaschi";
var pgn4web_project_email = "pgn4web@casaschi.net";
var helpWin;
function displayHelp(section) {
if (helpWin && !helpWin.closed) { helpWin.close(); }
helpWin = window.open(detectHelpLocation() + (section ? "?" + section : ""), "pgn4web_help", "resizable=yes,scrollbars=yes,toolbar=no,location=no,menubar=no,status=no");
if (helpWin && window.focus) { helpWin.focus(); }
}
// empty event APIs to be redefined
function customFunctionOnPgnTextLoad() {}
function customFunctionOnPgnGameLoad() {}
function customFunctionOnMove() {}
function customFunctionOnAlert(msg) {}
function customFunctionOnCheckLiveBroadcastStatus() {}
// custom header tags APIs for customFunctionOnPgnGameLoad
function customPgnHeaderTag(customTag, htmlElementId, gameNum) {
var matches, tag = "";
customTag = customTag.replace(/\W+/g, "");
if (gameNum === undefined) { gameNum = currentGame; }
if ((pgnHeader[gameNum]) && (matches = pgnHeader[gameNum].match('\\[\\s*' + customTag + '\\s*\"([^\"]+)\"\\s*\\]'))) { tag = matches[1]; }
if (htmlElementId) {
var theObj = document.getElementById(htmlElementId);
if ((theObj) && (typeof(theObj.innerHTML) == "string")) { theObj.innerHTML = tag; }
}
return tag;
}
// custom comment tags API for customFunctionOnMove
function customPgnCommentTag(customTag, htmlElementId, plyNum, varId) {
var matches, tag = "", theObj;
customTag = customTag.replace(/\W+/g, "");
if (typeof(varId) == "undefined") { varId = 0; }
if (typeof(plyNum) == "undefined") { plyNum = CurrentPly; }
if ((MoveCommentsVar[varId][plyNum]) && (matches = MoveCommentsVar[varId][plyNum].match('\\[%' + customTag + '\\s+((?:,?(?:"[^"]*"|[^,\\]]*))*)\\s*\\]'))) { tag = matches[1].replace(/\s+$/, ""); }
if ((htmlElementId) && (theObj = document.getElementById(htmlElementId)) && (typeof(theObj.innerHTML) == "string")) { theObj.innerHTML = tag; }
return tag;
}
function simpleAddEvent(obj, evt, cbk) {
if (obj.addEventListener) { obj.addEventListener(evt, cbk, false); }
else if (obj.attachEvent) { obj.attachEvent("on" + evt, cbk); } // bugfix: IE8 and below specific
}
simpleAddEvent(document, "keydown", pgn4web_handleKey_event);
simpleAddEvent(window, "load", pgn4web_onload_event);
function pgn4web_onload_event(e) {
pgn4web_onload(e);
}
function pgn4web_onload(e) {
start_pgn4web();
}
function start_pgn4web() {
// keep startup logs at the very first run, otherwise reset
if (alertFirstResetLoadingPgn) { alertFirstResetLoadingPgn = false; }
else { resetAlert(); }
InitImages();
createBoard();
pgn4web_initTouchEvents();
}
var alertLog;
var alertLast;
var alertNum;
var alertNumSinceReset;
var fatalErrorNumSinceReset;
var alertPromptInterval = null;
var alertPromptOn = false;
var alertFirstResetLoadingPgn = true;
resetAlert();
function resetAlert() {
alertLog = new Array(5);
alertLast = alertLog.length - 1;
alertNum = alertNumSinceReset = fatalErrorNumSinceReset = 0;
stopAlertPrompt();
if (!alertFirstResetLoadingPgn) {
if (boardIsDefault(debugShortcutSquare)) { boardShortcut(debugShortcutSquare, "pgn4web v" + pgn4web_version + " debug info", null, true); }
}
}
function myAlert(msg, fatalError, doNotPrompt) {
alertNum++;
alertNumSinceReset++;
if (fatalError) { fatalErrorNumSinceReset++; }
alertLast = (alertLast + 1) % alertLog.length;
alertLog[alertLast] = msg + "\n" + (new Date()).toLocaleString();
if (boardIsDefault(debugShortcutSquare)) { boardShortcut(debugShortcutSquare, "pgn4web v" + pgn4web_version + " debug info\n" + alertNum + " alert" + (alertNum > 1 ? "s" : ""), null, true); }
if ((!doNotPrompt) && ((LiveBroadcastDelay === 0) || (LiveBroadcastAlert === true)) && (boardIsDefault(debugShortcutSquare))) { startAlertPrompt(); }
customFunctionOnAlert(msg);
}
function startAlertPrompt() {
if (alertPromptOn) { return; } // dont start flashing twice
if (alertPromptInterval) { clearTimeout(alertPromptInterval); }
alertPromptInterval = setTimeout("alertPromptTick(true);", 500);
}
function stopAlertPrompt() {
if (alertPromptInterval) {
clearTimeout(alertPromptInterval);
alertPromptInterval = null;
}
if (alertPromptOn) { alertPromptTick(false); }
}
function alertPromptTick(restart) {
if (alertPromptInterval) {
clearTimeout(alertPromptInterval);
alertPromptInterval = null;
}
var colRow = colRowFromSquare(debugShortcutSquare);
if (!colRow) { return; }
var alertPromptDelay = 1500; // for alerts before the board is printed
var theObj = document.getElementById('tcol' + colRow.col + 'trow' + colRow.row);
if (theObj) {
if (alertPromptOn) {
if ((highlightOption) && ((colFromHighlighted === 0 && rowFromHighlighted === 7) || (colToHighlighted === 0 && rowToHighlighted === 7))) {
theObj.className = 'highlightWhiteSquare';
} else { theObj.className = 'whiteSquare'; }
} else { theObj.className = 'blackSquare'; }
alertPromptOn = !alertPromptOn;
if (alertPromptOn) { alertPromptDelay = 500; }
else { alertPromptDelay = 3000; }
}
if (restart) { alertPromptInterval = setTimeout("alertPromptTick(true);", alertPromptDelay); }
}
function stopEvProp(e) {
e.cancelBubble = true;
if (e.stopPropagation) { e.stopPropagation(); }
if (e.preventDefault) { e.preventDefault(); }
return false;
}
// for onFocus/onBlur textbox events, allowing text typing
var shortcutKeysWereEnabled = false;
function disableShortcutKeysAndStoreStatus() {
if ((shortcutKeysWereEnabled = shortcutKeysEnabled) === true) {
SetShortcutKeysEnabled(false);
}
}
function restoreShortcutKeysStatus() {
if (shortcutKeysWereEnabled === true) { SetShortcutKeysEnabled(true); }
shortcutKeysWereEnabled = false;
}
function customShortcutKey_Shift_0() {}
function customShortcutKey_Shift_1() {}
function customShortcutKey_Shift_2() {}
function customShortcutKey_Shift_3() {}
function customShortcutKey_Shift_4() {}
function customShortcutKey_Shift_5() {}
function customShortcutKey_Shift_6() {}
function customShortcutKey_Shift_7() {}
function customShortcutKey_Shift_8() {}
function customShortcutKey_Shift_9() {}
function pgn4web_handleKey_event(e) {
pgn4web_handleKey(e);
}
var shortcutKeysEnabled = false;
function pgn4web_handleKey(e) {
var keycode, oldPly, oldVar, colRow, colRowList;
if (!e) { e = window.event; }
if (e.altKey || e.ctrlKey || e.metaKey) { return true; }
keycode = e.keyCode;
// shift-escape always enabled: toggle shortcut keys
if (!shortcutKeysEnabled && !(keycode == 27 && e.shiftKey)) { return true; }
switch (keycode) {
case 8: // backspace
case 9: // tab
case 16: // shift
case 17: // ctrl
case 18: // alt
case 32: // space
case 33: // page-up
case 34: // page-down
case 35: // end
case 36: // home
case 92: // super
case 93: // menu
case 188: // comma
return true;
case 27: // escape
if (e.shiftKey) { interactivelyToggleShortcutKeys(); }
else { displayHelp(); }
break;
case 189: // dash
if (colRowList = prompt("Enter shortcut square coordinates to click:", "")) {
colRowList = colRowList.toUpperCase().replace(/[^A-Z0-9]/g,"");
while (colRow = colRowFromSquare(colRowList)) {
boardOnClick[colRow.col][colRow.row]({"id": "img_tcol" + colRow.col + "trow" + colRow.row}, e);
colRowList = colRowList.substr(2);
}
}
break;
case 90: // z
if (e.shiftKey) { window.open(pgn4web_project_url); }
else { displayDebugInfo(); }
break;
case 37: // left-arrow
case 74: // j
backButton(e);
break;
case 38: // up-arrow
case 72: // h
startButton(e);
break;
case 39: // right-arrow
case 75: // k
forwardButton(e);
break;
case 40: // down-arrow
case 76: // l
endButton(e);
break;
case 73: // i
MoveToPrevComment(e.shiftKey);
break;
case 79: // o
MoveToNextComment(e.shiftKey);
break;
case 190: // dot
if (e.shiftKey) { goToFirstChild(); }
else { goToNextVariationSibling(); }
break;
case 85: // u
if (e.shiftKey) { undoStackRedo(); }
else { undoStackUndo(); }
break;
case 45: // insert
undoStackRedo();
break;
case 46: // delete
undoStackUndo();
break;
case 83: // s
if (e.shiftKey) { searchPgnGame(""); }
else { searchPgnGamePrompt(); }
break;
case 13: // enter
if (e.shiftKey) { searchPgnGame(lastSearchPgnExpression, true); }
else { searchPgnGame(lastSearchPgnExpression); }
break;
case 68: // d
if (e.shiftKey) { displayFenData(); }
else { displayPgnData(true); }
break;
case 187: // equal
SwitchAutoPlay();
break;
case 65: // a
GoToMove(CurrentPly + 1);
SetAutoPlay(true);
break;
case 48: // 0
if (e.shiftKey) { customShortcutKey_Shift_0(); }
else { SetAutoPlay(false); }
break;
case 49: // 1
if (e.shiftKey) { customShortcutKey_Shift_1(); }
else { SetAutoplayDelayAndStart( 1*1000); }
break;
case 50: // 2
if (e.shiftKey) { customShortcutKey_Shift_2(); }
else { SetAutoplayDelayAndStart( 2*1000); }
break;
case 51: // 3
if (e.shiftKey) { customShortcutKey_Shift_3(); }
else { SetAutoplayDelayAndStart( 3*1000); }
break;
case 52: // 4
if (e.shiftKey) { customShortcutKey_Shift_4(); }
else { SetAutoplayDelayAndStart( 4*1000); }
break;
case 53: // 5
if (e.shiftKey) { customShortcutKey_Shift_5(); }
else { SetAutoplayDelayAndStart( 5*1000); }
break;
case 54: // 6
if (e.shiftKey) { customShortcutKey_Shift_6(); }
else { SetAutoplayDelayAndStart( 6*1000); }
break;
case 55: // 7
if (e.shiftKey) { customShortcutKey_Shift_7(); }
else { SetAutoplayDelayAndStart( 7*1000); }
break;
case 56: // 8
if (e.shiftKey) { customShortcutKey_Shift_8(); }
else { SetAutoplayDelayAndStart( 8*1000); }
break;
case 57: // 9
if (e.shiftKey) { customShortcutKey_Shift_9(); }
else { setCustomAutoplayDelay(); }
break;
case 81: // q
SetAutoplayDelayAndStart(10*1000);
break;
case 87: // w
SetAutoplayDelayAndStart(20*1000);
break;
case 69: // e
SetAutoplayDelayAndStart(30*1000);
break;
case 82: // r
pauseLiveBroadcast();
break;
case 84: // t
if (e.shiftKey) { LiveBroadcastSteppingMode = !LiveBroadcastSteppingMode; }
else { refreshPgnSource(); }
break;
case 89: // y
restartLiveBroadcast();
break;
case 70: // f
if (!e.shiftKey || IsRotated) { FlipBoard(); }
break;
case 71: // g
SetHighlight(!highlightOption);
break;
case 88: // x
randomGameRandomPly();
break;
case 67: // c
if (numberOfGames > 1) { Init(Math.floor(Math.random()*numberOfGames)); }
break;
case 86: // v
if (numberOfGames > 1) { Init(0); }
break;
case 66: // b
Init(currentGame - 1);
break;
case 78: // n
Init(currentGame + 1);
break;
case 77: // m
if (numberOfGames > 1) { Init(numberOfGames - 1); }
break;
case 80: // p
if (e.shiftKey) { SetCommentsOnSeparateLines(!commentsOnSeparateLines); }
else { SetCommentsIntoMoveText(!commentsIntoMoveText); }
oldPly = CurrentPly;
oldVar = CurrentVar;
Init();
GoToMove(oldPly, oldVar);
break;
default:
return true;
}
return stopEvProp(e);
}
var boardOnClick = new Array(8);
var boardTitle = new Array(8);
var boardDefault = new Array(8);
for (var col=0; col<8; col++) {
boardOnClick[col] = new Array(8);
boardTitle[col] = new Array(8);
boardDefault[col] = new Array(8);
}
clearShortcutSquares("ABCDEFGH", "12345678");
function colRowFromSquare(square) {
if ((typeof(square) != "string") || (!square)) { return null; }
var col = square.charCodeAt(0) - 65; // 65="A"
if ((col < 0) || (col > 7)) { return null; }
var row = 56 - square.charCodeAt(1); // 56="8"
if ((row < 0) || (row > 7)) { return null; }
return { "col": col, "row": row };
}
function clearShortcutSquares(cols, rows) {
if ((typeof(cols) != "string") || (typeof(rows) != "string")) { return; }
for (var c=0; c<cols.length; c++) { for (var r=0; r<rows.length; r++) {
boardShortcut(cols.charAt(c).toUpperCase()+rows.charAt(r), "", function(t,e){});
} }
}
function boardIsDefault(square) {
var colRow = colRowFromSquare(square);
if (!colRow) { return false; }
return boardDefault[colRow.col][colRow.row];
}
function boardShortcut(square, title, functionPointer, defaultSetting) {
var theObj, colRow = colRowFromSquare(square);
if (!colRow) { return; }
else { var col = colRow.col; var row = colRow.row; }
boardTitle[col][row] = title;
if (functionPointer) { boardOnClick[col][row] = functionPointer; }
boardDefault[col][row] = defaultSetting ? true : false;
if (theObj = document.getElementById('img_tcol' + col + 'trow' + row)) {
if (IsRotated) { square = String.fromCharCode(72-col,49+row); }
theObj.title = square + (boardTitle[col][row] ? ': ' + boardTitle[col][row] : '');
}
}
// boardShortcut() always assumes 'square' defined as with white on bottom
var debugShortcutSquare = "A8";
boardShortcut("A8", "pgn4web v" + pgn4web_version + " debug info", function(t,e){ displayDebugInfo(); }, true);
boardShortcut("B8", "show current position FEN string", function(t,e){ displayFenData(); }, true);
boardShortcut("C8", "show current game PGN source data", function(t,e){ if (e.shiftKey) { savePgnData(true); } else { displayPgnData(true); } }, true);
boardShortcut("D8", "show all games PGN source data", function(t,e){ if (e.shiftKey) { savePgnData(); } else { displayPgnData(); } }, true);
boardShortcut("E8", "search help", function(t,e){ displayHelp("search_tool"); }, true);
boardShortcut("F8", "shortcut keys help", function(t,e){ displayHelp("shortcut_keys"); }, true);
boardShortcut("G8", "shortcut squares help", function(t,e){ displayHelp(e.shiftKey ? "informant_symbols" : "shortcut_squares"); }, true);
boardShortcut("H8", "pgn4web help", function(t,e){ displayHelp(e.shiftKey ? "credits_and_license" : ""); }, true);
boardShortcut("A7", "pgn4web website", function(t,e){ window.open(pgn4web_project_url); }, true);
boardShortcut("B7", "undo last chessboard position update", function(t,e){ undoStackUndo(); }, true);
boardShortcut("C7", "redo last undo", function(t,e){ undoStackRedo(); }, true);
boardShortcut("D7", "toggle highlight last move", function(t,e){ SetHighlight(!highlightOption); }, true);
boardShortcut("E7", "flip board", function(t,e){ if (!e.shiftKey || IsRotated) { FlipBoard(); } }, true);
boardShortcut("F7", "toggle show comments in game text", function(t,e){ if (e.shiftKey) { SetCommentsOnSeparateLines(!commentsOnSeparateLines); } else { SetCommentsIntoMoveText(!commentsIntoMoveText); } var oldPly = CurrentPly; var oldVar = CurrentVar; Init(); GoToMove(oldPly, oldVar); }, true);
boardShortcut("G7", "", function(t,e){}, true); // see setG7A6B6H6...
boardShortcut("H7", "toggle enabling shortcut keys", function(t,e){ interactivelyToggleShortcutKeys(); }, true);
boardShortcut("A6", "", function(t,e){}, true); // see setG7A6B6H6...
boardShortcut("B6", "", function(t,e){}, true); // see setG7A6B6H6...
boardShortcut("C6", "search previous finished game", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"(?!\\*"\\s*\\])', true); });
boardShortcut("D6", "search previous unfinished game", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"\\*"\\s*\\]', true); });
boardShortcut("E6", "search next unfinished game", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"\\*"\\s*\\]', false); }, true);
boardShortcut("F6", "search next finished game", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"(?!\\*"\\s*\\])', false); }, true);
boardShortcut("G6", "", function(t,e){}, true);
boardShortcut("H6", "", function(t,e){}, true); // see setG7A6B6H6...
boardShortcut("A5", "repeat last search backward", function(t,e){ searchPgnGame(lastSearchPgnExpression, true); }, true);
boardShortcut("B5", "search prompt", function(t,e){ if (e.shiftKey) { searchPgnGame(""); } else { searchPgnGamePrompt(); } }, true);
boardShortcut("C5", "repeat last search", function(t,e){ searchPgnGame(lastSearchPgnExpression); }, true);
boardShortcut("D5", "search previous win result", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"(1-0|0-1)"\\s*\\]', true); }, true);
boardShortcut("E5", "search next win result", function(t,e){ searchPgnGame('\\[\\s*Result\\s*"(1-0|0-1)"\\s*\\]', false); }, true);
boardShortcut("F5", "", function(t,e){}, true);
boardShortcut("G5", "", function(t,e){}, true);
boardShortcut("H5", "", function(t,e){}, true);
boardShortcut("A4", "search previous event", function(t,e){ searchPgnGame('\\[\\s*Event\\s*"(?!' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\])', true); }, true);
boardShortcut("B4", "search previous round of same event", function(t,e){ searchPgnGame('\\[\\s*Event\\s*"' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\].*\\[\\s*Round\\s*"(?!' + fixRegExp(gameRound[currentGame]) + '"\\s*\\])|\\[\\s*Round\\s*"(?!' + fixRegExp(gameRound[currentGame]) + '"\\s*\\]).*\\[\\s*Event\\s*"' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\]', true); }, true);
boardShortcut("C4", "search previous game of same black player", function(t,e){ searchPgnGame('\\[\\s*' + (e.shiftKey ? 'White' : 'Black') + '\\s*"' + fixRegExp(gameBlack[currentGame]) + '"\\s*\\]', true); }, true);
boardShortcut("D4", "search previous game of same white player", function(t,e){ searchPgnGame('\\[\\s*' + (e.shiftKey ? 'Black' : 'White') + '\\s*"' + fixRegExp(gameWhite[currentGame]) + '"\\s*\\]', true); }, true);
boardShortcut("E4", "search next game of same white player", function(t,e){ searchPgnGame('\\[\\s*' + (e.shiftKey ? 'Black' : 'White') + '\\s*"' + fixRegExp(gameWhite[currentGame]) + '"\\s*\\]', false); }, true);
boardShortcut("F4", "search next game of same black player", function(t,e){ searchPgnGame('\\[\\s*' + (e.shiftKey ? 'White' : 'Black') + '\\s*"' + fixRegExp(gameBlack[currentGame]) + '"\\s*\\]', false); }, true);
boardShortcut("G4", "search next round of same event", function(t,e){ searchPgnGame('\\[\\s*Event\\s*"' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\].*\\[\\s*Round\\s*"(?!' + fixRegExp(gameRound[currentGame]) + '"\\s*\\])|\\[\\s*Round\\s*"(?!' + fixRegExp(gameRound[currentGame]) + '"\\s*\\]).*\\[\\s*Event\\s*"' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\]', false); }, true);
boardShortcut("H4", "search next event", function(t,e){ searchPgnGame('\\[\\s*Event\\s*"(?!' + fixRegExp(gameEvent[currentGame]) + '"\\s*\\])', false); }, true);
boardShortcut("A3", "load first game", function(t,e){ if (numberOfGames > 1) { Init(0); } }, true);
boardShortcut("B3", "jump to previous games decile", function(t,e){ if (currentGame > 0) { calculateDeciles(); for (var ii=(deciles.length-2); ii>=0; ii--) { if (currentGame > deciles[ii]) { Init(deciles[ii]); break; } } } }, true);
boardShortcut("C3", "load previous game", function(t,e){ Init(currentGame - 1); }, true);
boardShortcut("D3", "load random game", function(t,e){ if (numberOfGames > 1) { Init(Math.floor(Math.random()*numberOfGames)); } }, true);
boardShortcut("E3", "load random game at random position", function(t,e){ randomGameRandomPly(); }, true);
boardShortcut("F3", "load next game", function(t,e){ Init(currentGame + 1); }, true);
boardShortcut("G3", "jump to next games decile", function(t,e){ if (currentGame < numberOfGames - 1) { calculateDeciles(); for (var ii=1; ii<deciles.length; ii++) { if (currentGame < deciles[ii]) { Init(deciles[ii]); break; } } } }, true);
boardShortcut("H3", "load last game", function(t,e){ if (numberOfGames > 1) { Init(numberOfGames - 1); } }, true);
boardShortcut("A2", "stop autoplay", function(t,e){ SetAutoPlay(e.shiftKey); }, true);
boardShortcut("B2", "toggle autoplay", function(t,e){ SwitchAutoPlay(); }, true);
boardShortcut("C2", "autoplay 1 second", function(t,e){ SetAutoplayDelayAndStart((e.shiftKey ? 10 : 1)*1000); }, true);
boardShortcut("D2", "autoplay 2 seconds", function(t,e){ SetAutoplayDelayAndStart((e.shiftKey ? 20 : 2)*1000); }, true);
boardShortcut("E2", "autoplay 5 seconds", function(t,e){ SetAutoplayDelayAndStart((e.shiftKey ? 50 : 5)*1000); }, true);
boardShortcut("F2", "autoplay custom delay", function(t,e){ setCustomAutoplayDelay(); }, true);
boardShortcut("G2", "replay up to 6 previous half-moves, then autoplay forward", function(t,e){ replayPreviousMoves(e.shiftKey ? 10 : 6); }, true);
boardShortcut("H2", "replay the previous half-move, then autoplay forward", function(t,e){ replayPreviousMoves(e.shiftKey ? 3 : 1); }, true);
boardShortcut("A1", "go to game start", function(t,e){ startButton(e); }, true);
boardShortcut("B1", "", function(t,e){}, true); // see setB1C1F1G1...
boardShortcut("C1", "", function(t,e){}, true); // see setB1C1F1G1...
boardShortcut("D1", "move backward", function(t,e){ backButton(e); }, true);
boardShortcut("E1", "move forward", function(t,e){ forwardButton(e); }, true);
boardShortcut("F1", "", function(t,e){}, true); // see setB1C1F1G1...
boardShortcut("G1", "", function(t,e){}, true); // see setB1C1F1G1...
boardShortcut("H1", "go to game end", function(t,e){ endButton(e); }, true);
setG7A6B6H7boardShortcuts();
function setG7A6B6H7boardShortcuts() {
if (LiveBroadcastDelay > 0) {
if (boardIsDefault("G7")) { boardShortcut("G7", "", function(t,e){}, true); }
if (boardIsDefault("A6")) { boardShortcut("A6", "pause live broadcast automatic games refresh", function(t,e){ pauseLiveBroadcast(); }, true); }
if (boardIsDefault("B6")) { boardShortcut("B6", "restart live broadcast automatic games refresh", function(t,e){ restartLiveBroadcast(); }, true); }
if (boardIsDefault("H6")) { boardShortcut("H6", "force live broadcast games refresh", function(t,e){ refreshPgnSource(); }, true); }
} else {
if (boardIsDefault("G7")) { boardShortcut("G7", "toggle autoplay next game", function(t,e){ SetAutoplayNextGame(!autoplayNextGame); }, true); }
if (boardIsDefault("A6")) { boardShortcut("A6", "", function(t,e){}, true); }
if (boardIsDefault("B6")) { boardShortcut("B6", "", function(t,e){}, true); }
if (boardIsDefault("H6")) { boardShortcut("H6", "", function(t,e){}, true); }
}
}
setB1C1F1G1boardShortcuts();
function setB1C1F1G1boardShortcuts() {
if (commentsIntoMoveText && GameHasComments) {
if (boardIsDefault("B1")) { boardShortcut("B1", "find previous comment or variation", function(t,e){ if (e.shiftKey) { GoToMove(CurrentPly - 10); } else { MoveToPrevComment(); } }, true); }
if (boardIsDefault("G1")) { boardShortcut("G1", "find next comment or variation", function(t,e){ if (e.shiftKey) { GoToMove(CurrentPly + 10); } else { MoveToNextComment(); } }, true); }
} else {
if (boardIsDefault("B1")) { boardShortcut("B1", "move 10 half-moves backward", function(t,e){ GoToMove(CurrentPly - 10); }, true); }
if (boardIsDefault("G1")) { boardShortcut("G1", "move 10 half-moves forward", function(t,e){ GoToMove(CurrentPly + 10); }, true); }
}
if (commentsIntoMoveText && GameHasVariations) {
if (boardIsDefault("C1")) { boardShortcut("C1", "go to parent variation", function(t,e){ if (e.shiftKey) { GoToMove(CurrentPly - 6); } else { GoToMove(StartPlyVar[CurrentVar]); } }, true); }
if (boardIsDefault("F1")) { boardShortcut("F1", "cycle through alternative variations, if any, otherwise move forward", function(t,e){ if (e.shiftKey) { GoToMove(CurrentPly + 6); } else { if (!goToNextVariationSibling()) { GoToMove(CurrentPly + 1); } } }, true); }
} else {
if (boardIsDefault("C1")) { boardShortcut("C1", "move 6 half-moves backward", function(t,e){ GoToMove(CurrentPly - 6); }, true); }
if (boardIsDefault("F1")) { boardShortcut("F1", "move 6 half-moves forward", function(t,e){ GoToMove(CurrentPly + 6); }, true); }
}
}
var deciles = new Array(11);
function calculateDeciles() {
for (var ii=0; ii<deciles.length; ii++) {
deciles[ii] = Math.round((numberOfGames - 1) * ii / (deciles.length - 1));
}
}
function replayPreviousMoves(numPlies) {
var thisPly = numPlies ? CurrentPly - numPlies : StartPly;
if (thisPly < StartPlyVar[CurrentVar]) {
thisPly = StartPlyVar[CurrentVar] + (CurrentVar === 0 ? 0 : 1);
}
if (thisPly !== CurrentPly) { GoToMove(thisPly); }
SetAutoPlay(true);
}
function detectJavascriptLocation(jsre) {
if (typeof(jsre) == "undefined") { jsre = new RegExp("pgn4web(|-compacted|\.min)\.js$", ""); }
var e = document.getElementsByTagName("script");
for (var i=0; i<e.length; i++) {
if ((e[i].src) && (e[i].src.match(jsre))) {
return e[i].src;
}
}
return "";
}
function detectHelpLocation() {
return detectJavascriptLocation().replace(/pgn4web(|-compacted|\.min)\.js$/, "pgn4web-help.html");
}
function detectBaseLocation() {
var e = document.getElementsByTagName("base");
for (var i=0; i<e.length; i++) {
if (e[i].href) { return e[i].href; }
}
return "";
}
var debugWin;
function displayDebugInfo() {
var theObj;
var bu = detectBaseLocation();
var ju = detectJavascriptLocation();
stopAlertPrompt();
var dbg1 = 'pgn4web: version=' + pgn4web_version + ' homepage=' + pgn4web_project_url + '\n\nHTMLURL: length=' + location.href.length + ' url=';
var dbg2 = location.href.length < 100 ? location.href : (location.href.substring(0,99) + '...');
var dbg3 = (bu ? '\nBASEURL: url=' + bu : '') + (ju != 'pgn4web.js' ? '\nJSURL: url=' + ju : '');
if (pgnUrl) {
dbg3 += '\nPGNURL: url=' + pgnUrl;
} else if (theObj = document.getElementById("pgnText")) {
dbg3 += '\nPGNTEXT: length=' + (theObj.tagName.toLowerCase() == 'textarea' ? theObj.value.length : '?');
}
dbg3 += '\n' + (numberOfGames > 1 ? '\nGAME: current=' + (currentGame+1) + ' number=' + numberOfGames : '') + (numberOfVars > 1 ? '\nVARIATION: current=' + CurrentVar + ' number=' + (numberOfVars-1) : '') + (PlyNumber > 0 ? '\nPLY: start=' + StartPly + ' current=' + CurrentPly + ' number=' + PlyNumber : '') + '\nAUTOPLAY: status=' + (isAutoPlayOn ? 'on' : 'off') + ' delay=' + Delay + 'ms' + ' next=' + autoplayNextGame;
if ((typeof(gameVariant[currentGame]) !== "undefined") && (gameVariant[currentGame].match(/^\s*(|chess|normal|standard)\s*$/i) === null)) {
dbg3 += '\nVARIANT: ' + gameVariant[currentGame];
}
if (LiveBroadcastDelay > 0) {
dbg3 += '\n\nLIVEBROADCAST: status=' + liveStatusDebug() + (LiveBroadcastEndlessMode ? '/endless ' : '') + ' ticker=' + LiveBroadcastTicker + ' delay=' + LiveBroadcastDelay + 'm' + '\n' + 'refreshed: ' + LiveBroadcastLastRefreshedLocal + '\n' + 'received: ' + LiveBroadcastLastReceivedLocal + '\n' + 'modified (server time): ' + LiveBroadcastLastModified_ServerTime();
}
if (typeof(engineWinCheck) == "function") {
dbg3 += '\n\nANALYSIS: ' + (engineWinCheck() ? 'board=connected ' + engineWin.customDebugInfo() : 'board=disconnected');
}
var thisInfo = customDebugInfo();
if (thisInfo) { dbg3 += '\n\nCUSTOM: ' + thisInfo; }
dbg3 += '\n\nALERTLOG: fatalnew=' + fatalErrorNumSinceReset + ' new=' + alertNumSinceReset + ' shown=' + Math.min(alertNum, alertLog.length) + ' total=' + alertNum + '\n--';
if (alertNum > 0) {
for (var ii = 0; ii<alertLog.length; ii++) {
if (alertLog[(alertNum - 1 - ii) % alertLog.length] === undefined) { break; }
else { dbg3 += "\n" + alertLog[(alertNum - 1 - ii) % alertLog.length] + "\n--"; }
}
}
if (confirm(dbg1 + dbg2 + dbg3 + '\n\nclick OK to show this debug info in a browser window for cut and paste')) {
if (debugWin && !debugWin.closed) { debugWin.close(); }
debugWin = window.open("", "pgn4web_debug_data", "resizable=yes,scrollbars=yes,toolbar=no,location=no,menubar=no,status=no");
if (debugWin) {
debugWin.document.open("text/html", "replace");
debugWin.document.write("<html><head><title>pgn4web debug info</title><link rel='icon' sizes='16x16' href='pawn.ico' /></head><body>\n<pre>\n" + dbg1 + location.href + " " + dbg3 + "\n</pre>\n</body></html>");
debugWin.document.close();
if (window.focus) { debugWin.focus(); }
}
}
alertNumSinceReset = fatalErrorNumSinceReset = 0;
}
function liveStatusDebug() {
if (LiveBroadcastEnded) { return "ended"; }
if (LiveBroadcastPaused) { return "paused"; }
if (LiveBroadcastStarted) { return "started"; }
return "waiting";
}
function customDebugInfo() { return ""; }
var pgnWin;
function displayPgnData(oneGameOnly) {
if (pgnWin && !pgnWin.closed) { pgnWin.close(); }
pgnWin = window.open("", "pgn4web_pgn_data", "resizable=yes,scrollbars=yes,toolbar=no,location=no,menubar=no,status=no");
if (pgnWin) {
var text = "<html><head><title>pgn4web PGN source</title><link rel='icon' sizes='16x16' href='pawn.ico' /></head><body>\n<pre>\n";
if (oneGameOnly) { text += fullPgnGame(currentGame) + "\n\n"; }
else { for (var ii = 0; ii < numberOfGames; ++ii) { text += fullPgnGame(ii) + "\n\n"; } }
text += "\n</pre>\n</body></html>";
pgnWin.document.open("text/html", "replace");
pgnWin.document.write(text);
pgnWin.document.close();
if (window.focus) { pgnWin.focus(); }
}
}
function savePgnData(oneGameOnly) {
if (pgnUrl && !oneGameOnly) { location.href = pgnUrl; }
else {
displayPgnData(oneGameOnly); // fallback on displayPgnData for now
}
}
function CurrentFEN() {
var thisFEN = "";
var emptySquares = 0;
for (var row=7; row>=0; row--) {
for (var col=0; col<=7; col++) {
if (Board[col][row] === 0) { emptySquares++; }
else {
if (emptySquares) {
thisFEN += emptySquares;
emptySquares = 0;
}
if (Board[col][row] > 0) { thisFEN += PiecesArr[Board[col][row]-1].toUpperCase(); }
else if (Board[col][row] < 0) { thisFEN += PiecesArr[-Board[col][row]-1].toLowerCase(); }
}
}
if (emptySquares) {
thisFEN += emptySquares;
emptySquares = 0;
}
if (row>0) { thisFEN += "/"; }
}
thisFEN += CurrentPly%2 ? " b" : " w";
// castling availability: always in the KQkq form
// knownbug: wrong FEN for Chess960 positions with inner castling rook
var CastlingFEN = "";
if (RookForOOCastling(0) !== null) { CastlingFEN += PiecesArr[0].toUpperCase(); }
if (RookForOOOCastling(0) !== null) { CastlingFEN += PiecesArr[1].toUpperCase(); }
if (RookForOOCastling(1) !== null) { CastlingFEN += PiecesArr[0].toLowerCase(); }
if (RookForOOOCastling(1) !== null) { CastlingFEN += PiecesArr[1].toLowerCase(); }
thisFEN += " " + (CastlingFEN || "-");
if (HistEnPassant[CurrentPly]) {
thisFEN += " " + String.fromCharCode(HistEnPassantCol[CurrentPly] + 97);
thisFEN += CurrentPly%2 ? "3" : "6";
} else { thisFEN += " -"; }
var HalfMoveClock = InitialHalfMoveClock;
for (var thisPly = StartPly; thisPly < CurrentPly; thisPly++) {
if ((HistType[0][thisPly] == 6) || (HistPieceId[1][thisPly] >= 16)) { HalfMoveClock = 0; }
else { HalfMoveClock++; }
}
thisFEN += " " + HalfMoveClock;
thisFEN += " " + (Math.floor(CurrentPly/2)+1);
return thisFEN;
}
var fenWin;
function displayFenData(addGametext) {
if (fenWin && !fenWin.closed) { fenWin.close(); }
var thisFEN = CurrentFEN();
var movesStr = "";
var lineStart = 0;
if (addGametext) {
for (var thisPly = CurrentPly; thisPly <= StartPly + PlyNumber; thisPly++) {
var addStr = "";
if (thisPly == StartPly + PlyNumber) {
addStr = (CurrentVar ? "*" : gameResult[currentGame] || "*");
} else {
if (thisPly%2 === 0) { addStr = (Math.floor(thisPly/2)+1) + ". "; }
else if (thisPly == CurrentPly) { addStr = (Math.floor(thisPly/2)+1) + "... "; }
addStr += Moves[thisPly];
}
if (movesStr.length + addStr.length + 1 > lineStart + 80) {
lineStart = movesStr.length;
movesStr += "\n" + addStr;
} else {
if (movesStr.length > 0) { movesStr += " "; }
movesStr += addStr;
}
}
}
fenWin = window.open("", "pgn4web_fen_data", "resizable=yes,scrollbars=yes,toolbar=no,location=no,menubar=no,status=no");
if (fenWin) {
var text = "<html><head><title>pgn4web FEN string</title><link rel='icon' sizes='16x16' href='pawn.ico' /></head><body>\n<b><pre>\n\n" + thisFEN + "\n\n</pre></b>\n<hr>\n<pre>\n\n";
if (addGametext) {
text += "[Event \"" + ((CurrentVar ? "" : gameEvent[currentGame]) || "?") + "\"]\n";
text += "[Site \"" + ((CurrentVar ? "" : gameSite[currentGame]) || "?") + "\"]\n";
text += "[Date \"" + ((CurrentVar ? "" : gameDate[currentGame]) || "????.??.??") + "\"]\n";
text += "[Round \"" + ((CurrentVar ? "" : gameRound[currentGame]) || "?") + "\"]\n";
text += "[White \"" + ((CurrentVar ? "" : gameWhite[currentGame]) || "?") + "\"]\n";
text += "[Black \"" + ((CurrentVar ? "" : gameBlack[currentGame]) || "?") + "\"]\n";
text += "[Result \"" + ((CurrentVar ? "" : gameResult[currentGame]) || "*") + "\"]\n";
}
if ((thisFEN != FenStringStart) || (!addGametext)) {
text += "[SetUp \"1\"]\n" + "[FEN \"" + thisFEN + "\"]\n";
}
if (gameVariant[currentGame] !== "") { text += "[Variant \"" + gameVariant[currentGame] + "\"]\n"; }
if (addGametext) { text += "\n" + movesStr + "\n"; }
text += "</pre>\n</body></html>";
fenWin.document.open("text/html", "replace");
fenWin.document.write(text);
fenWin.document.close();
if (window.focus) { fenWin.focus(); }
}
}
var pgnHeader = new Array();
var pgnGame = new Array();
var numberOfGames = -1;
var currentGame = -1;
var firstStart = true;
var gameDate = new Array();
var gameWhite = new Array();
var gameBlack = new Array();
var gameEvent = new Array();
var gameSite = new Array();
var gameRound = new Array();
var gameResult = new Array();
var gameSetUp = new Array();
var gameFEN = new Array();
var gameInitialWhiteClock = new Array();
var gameInitialBlackClock = new Array();
var gameVariant = new Array();
var highlightedMoveId = "";
var isAutoPlayOn = false;
var AutoPlayInterval = null;
var Delay = 1000; // milliseconds
var autostartAutoplay = false;
var autoplayNextGame = false;
var initialGame = 1;
var initialVariation = 0;
var initialHalfmove = 0;
var alwaysInitialHalfmove = false;
var LiveBroadcastInterval = null;
var LiveBroadcastDelay = 0; // minutes
var LiveBroadcastAlert = false;
var LiveBroadcastDemo = false;
var LiveBroadcastStarted = false;
var LiveBroadcastEnded = false;
var LiveBroadcastPaused = false;
var LiveBroadcastTicker = 0;
var LiveBroadcastGamesRunning = 0;
var LiveBroadcastLastModified = new Date(0); // default to epoch start
var LiveBroadcastLastModifiedHeader = LiveBroadcastLastModified.toUTCString();
var LiveBroadcastLastReceivedLocal = 'unavailable';
var LiveBroadcastLastRefreshedLocal = 'unavailable';
var LiveBroadcastPlaceholderEvent = 'live chess broadcast';
var LiveBroadcastPlaceholderPgn = '[Event "' + LiveBroadcastPlaceholderEvent + '"]';
var gameDemoMaxPly = new Array();
var gameDemoLength = new Array();
var LiveBroadcastSteppingMode = false;
var LiveBroadcastEndlessMode = false;
var ParseLastMoveError = false;
var castleRook = -1;
var mvCapture = 0;
var mvIsCastling = 0;
var mvIsPromotion = 0;
var mvFromCol = -1;
var mvFromRow = -1;
var mvToCol = -1;
var mvToRow = -1;
var mvPiece = -1;
var mvPieceId = -1;
var mvPieceOnTo = -1;
var mvCaptured = -1;
var mvCapturedId = -1;
var mvIsNull = 0;
var Board = new Array(8);
for (var i=0; i<8; ++i) { Board[i] = new Array(8); }
// HistCol, HistRow: move history up to last replayed ply
// HistCol[0], HistRow[0]: "square from"; 0..7, 0..7 from A1
// HistCol[1], HistRow[1]: castling/capture
// HistCol[2], HistRow[2]: "square to"; 0..7, 0..7 from A1
var HistCol = new Array(3);
var HistRow = new Array(3);
var HistPieceId = new Array(2);
var HistType = new Array(2);
var HistVar = new Array();
var PieceCol = new Array(2);
var PieceRow = new Array(2);
var PieceType = new Array(2);
var PieceMoveCounter = new Array(2);
for (i=0; i<2; ++i) {
PieceCol[i] = new Array(16);
PieceRow[i] = new Array(16);
PieceType[i] = new Array(16);
PieceMoveCounter[i] = new Array(16);
HistType[i] = new Array();
HistPieceId[i] = new Array();
}
for (i=0; i<3; ++i) {
HistCol[i] = new Array();
HistRow[i] = new Array();
}
var HistEnPassant = new Array();
HistEnPassant[0] = false;
var HistEnPassantCol = new Array();
HistEnPassantCol[0] = -1;
var HistNull = new Array();
HistNull[0] = 0;
var PiecesArr = "KQRBNP".split("");
var FenStringStart = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
var columnsLetters = "ABCDEFGH";
var InitialHalfMoveClock = 0;
var PieceImg = new Array(new Array(6), new Array(6));
var ClearImg;
var ImagePath = 'images';
var ImagePathOld = null;
var imageType = 'png';
var defaultImagesSize = 40;
var highlightOption = true;
var commentsIntoMoveText = true;
var commentsOnSeparateLines = false;
var pgnUrl = '';