client/src/components/BaseGame.vue

   1 <template lang="pug">
   2 div#baseGame
   3   input#modalEog.modal(type="checkbox")
   4   div#eogDiv(
   5     role="dialog"
   6     data-checkbox="modalEog"
   7   )
   8     .card.text-center
   9       label.modal-close(for="modalEog")
  10       h3.section {{ endgameMessage }}
  11   #gameContainer
  12     #boardContainer
  13       Board(
  14         ref="board"
  15         :vr="vr"
  16         :last-move="lastMove"
  17         :analyze="mode=='analyze'"
  18         :score="game.score"
  19         :user-color="game.mycolor"
  20         :orientation="orientation"
  21         :vname="game.vname"
  22         :incheck="incheck"
  23         @play-move="play"
  24         @click-square="clickSquare"
  25       )
  26       #turnIndicator(v-if="showTurn") {{ turn }}
  27       #controls.button-group
  28         button(@click="gotoBegin()")
  29           img.inline(src="/images/icons/fast-forward_rev.svg")
  30         button(@click="undo()")
  31           img.inline(src="/images/icons/play_rev.svg")
  32         button(v-if="canFlip" @click="flip()")
  33           img.inline(src="/images/icons/flip.svg")
  34         button(
  35           @click="runAutoplay()"
  36           :class="{'in-autoplay': autoplay}"
  37         )
  38           img.inline(src="/images/icons/autoplay.svg")
  39         button(@click="play()")
  40           img.inline(src="/images/icons/play.svg")
  41         button(@click="gotoEnd()")
  42           img.inline(src="/images/icons/fast-forward.svg")
  43       p#fenAnalyze(v-show="showFen") {{ (!!vr ? vr.getFen() : "") }}
  44     #movesList
  45       MoveList(
  46         :show="showMoves"
  47         :canAnalyze="canAnalyze"
  48         :canDownload="allowDownloadPGN"
  49         :score="game.score"
  50         :message="game.scoreMsg"
  51         :firstNum="firstMoveNumber"
  52         :moves="moves"
  53         :cursor="cursor"
  54         @download="download"
  55         @showrules="showRules"
  56         @analyze="toggleAnalyze"
  57         @goto-move="gotoMove"
  58         @redraw-board="redrawBoard"
  59       )
  60     .clearer
  61 </template>
  62
  63 <script>
  64 import Board from "@/components/Board.vue";
  65 import MoveList from "@/components/MoveList.vue";
  66 import params from "@/parameters";
  67 import { store } from "@/store";
  68 import { getSquareId } from "@/utils/squareId";
  69 import { getDate } from "@/utils/datetime";
  70 import { processModalClick } from "@/utils/modalClick";
  71 import { getScoreMessage } from "@/utils/scoring";
  72 import { getFullNotation } from "@/utils/notation";
  73 import { undoMove } from "@/utils/playUndo";
  74 export default {
  75   name: "my-base-game",
  76   components: {
  77     Board,
  78     MoveList
  79   },
  80   props: ["game"],
  81   data: function() {
  82     return {
  83       st: store.state,
  84       // NOTE: all following variables must be reset at the beginning of a game
  85       vr: null, //VariantRules object, game state
  86       endgameMessage: "",
  87       orientation: "w",
  88       mode: "",
  89       score: "*", //'*' means 'unfinished'
  90       moves: [],
  91       cursor: -1, //index of the move just played
  92       lastMove: null,
  93       firstMoveNumber: 0, //for printing
  94       incheck: [], //for Board
  95       inMultimove: false,
  96       autoplay: false,
  97       inPlay: false,
  98       stackToPlay: []
  99     };
 100   },
 101   computed: {
 102     turn: function() {
 103       if (!this.vr) return "";
 104       if (this.vr.showMoves != "all") {
 105         return this.st.tr[
 106           (this.vr.turn == 'w' ? "White" : "Black") + " to move"];
 107       }
 108       // Cannot flip (racing king or circular chess), or Monochrome
 109       return (
 110         this.vr.movesCount == 0 && this.game.mycolor == "w"
 111           ? this.st.tr["It's your turn!"]
 112           : ""
 113       );
 114     },
 115     showFen: function() {
 116       return (
 117         this.mode == "analyze" &&
 118         this.$router.currentRoute.path.indexOf("/analyse") === -1
 119       );
 120     },
 121     // TODO: is it OK to pass "computed" as properties?
 122     // Also, some are seemingly not recomputed when vr is initialized.
 123     showMoves: function() {
 124       return this.game.score != "*"
 125         ? "all"
 126         : (!!this.vr ? this.vr.showMoves : "none");
 127     },
 128     showTurn: function() {
 129       return (
 130         this.game.score == '*' &&
 131         !!this.vr &&
 132         (
 133           this.vr.showMoves != "all" ||
 134           !this.vr.canFlip ||
 135           this.vr.showFirstTurn
 136         )
 137       );
 138     },
 139     canAnalyze: function() {
 140       return (
 141         this.game.mode != "analyze" &&
 142         !!this.vr && this.vr.canAnalyze
 143       );
 144     },
 145     canFlip: function() {
 146       return !!this.vr && this.vr.canFlip;
 147     },
 148     allowDownloadPGN: function() {
 149       return (
 150         this.game.score != "*" ||
 151         (!!this.vr && this.vr.showMoves == "all")
 152       );
 153     }
 154   },
 155   created: function() {
 156     if (!!this.game.fenStart) this.re_setVariables();
 157   },
 158   mounted: function() {
 159     if (!("ontouchstart" in window)) {
 160       // Desktop browser:
 161       const baseGameDiv = document.getElementById("baseGame");
 162       baseGameDiv.tabIndex = 0;
 163       baseGameDiv.addEventListener("click", this.focusBg);
 164       baseGameDiv.addEventListener("keydown", this.handleKeys);
 165       baseGameDiv.addEventListener("wheel", this.handleScroll);
 166     }
 167     document.getElementById("eogDiv")
 168       .addEventListener("click", processModalClick);
 169   },
 170   beforeDestroy: function() {
 171     // TODO: probably not required
 172     this.autoplay = false;
 173   },
 174   methods: {
 175     focusBg: function() {
 176       document.getElementById("baseGame").focus();
 177     },
 178     handleKeys: function(e) {
 179       if ([32, 37, 38, 39, 40].includes(e.keyCode)) e.preventDefault();
 180       switch (e.keyCode) {
 181         case 37:
 182           this.undo();
 183           break;
 184         case 39:
 185           this.play();
 186           break;
 187         case 38:
 188           this.gotoBegin();
 189           break;
 190         case 40:
 191           this.gotoEnd();
 192           break;
 193         case 32:
 194           this.flip();
 195           break;
 196       }
 197     },
 198     handleScroll: function(e) {
 199       e.preventDefault();
 200       if (e.deltaY < 0) this.undo();
 201       else if (e.deltaY > 0) this.play();
 202     },
 203     redrawBoard: function() {
 204       this.$refs["board"].re_setDrawings();
 205     },
 206     showRules: function() {
 207       // The button is here only on Game page:
 208       document.getElementById("modalRules").checked = true;
 209     },
 210     re_setVariables: function(game) {
 211       if (!game) game = this.game; //in case of...
 212       this.endgameMessage = "";
 213       // "w": default orientation for observed games
 214       this.orientation = game.mycolor || "w";
 215       this.mode = game.mode || game.type; //TODO: merge...
 216       this.moves = JSON.parse(JSON.stringify(game.moves || []));
 217       // Post-processing: decorate each move with notation and FEN
 218       this.vr = new V(game.fenStart);
 219       this.inMultimove = false; //in case of
 220       if (!!this.$refs["board"])
 221         // Also in case of:
 222         this.$refs["board"].resetCurrentAttempt();
 223       let analyseBtn = document.getElementById("analyzeBtn");
 224       if (!!analyseBtn) analyseBtn.classList.remove("active");
 225       const parsedFen = V.ParseFen(game.fenStart);
 226       const firstMoveColor = parsedFen.turn;
 227       this.firstMoveNumber = Math.floor(parsedFen.movesCount / 2) + 1;
 228       let L = this.moves.length;
 229       if (L == 0) {
 230         // Could be started on a random position in analysis mode:
 231         this.incheck = this.vr.getCheckSquares();
 232         this.score = this.vr.getCurrentScore();
 233         if (this.score != '*') {
 234           // Show score on screen
 235           const message = getScoreMessage(this.score);
 236           this.showEndgameMsg(this.score + " . " + this.st.tr[message]);
 237         }
 238       }
 239       else {
 240         this.moves.forEach((move,idx) => {
 241           // Strategy working also for multi-moves:
 242           if (!Array.isArray(move)) move = [move];
 243           const Lm = move.length;
 244           move.forEach((m,idxM) => {
 245             m.notation = this.vr.getNotation(m);
 246             m.unambiguous = V.GetUnambiguousNotation(m);
 247             this.vr.play(m);
 248             const checkSquares = this.vr.getCheckSquares();
 249             if (checkSquares.length > 0) m.notation += "+";
 250             if (idxM == Lm - 1) m.fen = this.vr.getFen();
 251             if (idx == L - 1 && idxM == Lm - 1) {
 252               this.incheck = checkSquares;
 253               this.score = this.vr.getCurrentScore();
 254               if (["1-0", "0-1"].includes(this.score)) m.notation += "#";
 255             }
 256           });
 257         });
 258       }
 259       if (firstMoveColor == "b") {
 260         // 'start' & 'end' is required for Board component
 261         this.moves.unshift({
 262           notation: "...",
 263           unambiguous: "...",
 264           start: { x: -1, y: -1 },
 265           end: { x: -1, y: -1 },
 266           fen: game.fenStart
 267         });
 268         L++;
 269       }
 270       this.positionCursorTo(L - 1);
 271     },
 272     positionCursorTo: function(index) {
 273       this.cursor = index;
 274       // Note: last move in moves array might be a multi-move
 275       if (index >= 0) this.lastMove = this.moves[index];
 276       else this.lastMove = null;
 277     },
 278     toggleAnalyze: function() {
 279       // Freeze while choices are shown (and autoplay has priority)
 280       if (
 281         this.inPlay ||
 282         this.$refs["board"].choices.length > 0 ||
 283         this.autoplay
 284       ) {
 285         return;
 286       }
 287       if (this.mode != "analyze") {
 288         // Enter analyze mode:
 289         this.mode = "analyze";
 290         if (this.inMultimove) this.cancelCurrentMultimove();
 291         this.gameMode = this.mode; //was not 'analyze'
 292         this.gameCursor = this.cursor;
 293         this.gameMoves = JSON.parse(JSON.stringify(this.moves));
 294         document.getElementById("analyzeBtn").classList.add("active");
 295       }
 296       else {
 297         // Exit analyze mode:
 298         this.mode = this.gameMode ;
 299         this.cursor = this.gameCursor;
 300         this.moves = this.gameMoves;
 301         let fen = this.game.fenStart;
 302         if (this.cursor >= 0) {
 303           let mv = this.moves[this.cursor];
 304           if (!Array.isArray(mv)) mv = [mv];
 305           fen = mv[mv.length-1].fen;
 306         }
 307         this.vr = new V(fen);
 308         this.inMultimove = false; //in case of
 309         this.$refs["board"].resetCurrentAttempt(); //also in case of
 310         this.incheck = this.vr.getCheckSquares();
 311         if (this.cursor >= 0) this.lastMove = this.moves[this.cursor];
 312         else this.lastMove = null;
 313         document.getElementById("analyzeBtn").classList.remove("active");
 314       }
 315     },
 316     download: function() {
 317       const content = this.getPgn();
 318       // Prepare and trigger download link
 319       let downloadAnchor = document.getElementById("download");
 320       downloadAnchor.setAttribute("download", "game.pgn");
 321       downloadAnchor.href =
 322         "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 323       downloadAnchor.click();
 324     },
 325     getPgn: function() {
 326       let pgn = "";
 327       pgn += '[Site "vchess.club"]\n';
 328       pgn += '[Variant "' + this.game.vname + '"]\n';
 329       const gdt = getDate(new Date(this.game.created || Date.now()));
 330       pgn += '[Date "' + gdt + '"]\n';
 331       pgn += '[White "' + this.game.players[0].name + '"]\n';
 332       pgn += '[Black "' + this.game.players[1].name + '"]\n';
 333       pgn += '[Fen "' + this.game.fenStart + '"]\n';
 334       pgn += '[Result "' + this.game.score + '"]\n';
 335       if (!!this.game.id)
 336         pgn += '[Url "' + params.serverUrl + '/game/' + this.game.id + '"]\n';
 337       if (!!this.game.cadence)
 338         pgn += '[Cadence "' + this.game.cadence + '"]\n';
 339       pgn += '\n';
 340       for (let i = 0; i < this.moves.length; i += 2) {
 341         if (i > 0) pgn += " ";
 342         // Adjust dots notation for a better display:
 343         let fullNotation = getFullNotation(this.moves[i]);
 344         if (fullNotation == "...") fullNotation = "..";
 345         pgn += (i / 2 + this.firstMoveNumber) + "." + fullNotation;
 346         if (i+1 < this.moves.length)
 347           pgn += " " + getFullNotation(this.moves[i+1]);
 348       }
 349       pgn += "\n\n";
 350       for (let i = 0; i < this.moves.length; i += 2) {
 351         const moveNumber = i / 2 + this.firstMoveNumber;
 352         // Skip "dots move", useless for machine reading:
 353         if (this.moves[i].notation != "...") {
 354           pgn += moveNumber + ".w " +
 355             getFullNotation(this.moves[i], "unambiguous") + "\n";
 356         }
 357         if (i+1 < this.moves.length) {
 358           pgn += moveNumber + ".b " +
 359             getFullNotation(this.moves[i+1], "unambiguous") + "\n";
 360         }
 361       }
 362       return pgn;
 363     },
 364     showEndgameMsg: function(message) {
 365       this.endgameMessage = message;
 366       document.getElementById("modalEog").checked = true;
 367     },
 368     runAutoplay: function() {
 369       if (this.autoplay) {
 370         this.autoplay = false;
 371         if (this.stackToPlay.length > 0)
 372           // Move(s) arrived in-between
 373           this.play(this.stackToPlay.pop(), "received");
 374       }
 375       else if (this.cursor < this.moves.length - 1) {
 376         this.autoplay = true;
 377         this.play(null, null, null, "autoplay");
 378       }
 379     },
 380     // Animate an elementary move
 381     animateMove: function(move, callback) {
 382       let startSquare = document.getElementById(getSquareId(move.start));
 383       if (!startSquare) return; //shouldn't happen but...
 384       let endSquare = document.getElementById(getSquareId(move.end));
 385       let rectStart = startSquare.getBoundingClientRect();
 386       let rectEnd = endSquare.getBoundingClientRect();
 387       let translation = {
 388         x: rectEnd.x - rectStart.x,
 389         y: rectEnd.y - rectStart.y
 390       };
 391       let movingPiece = document.querySelector(
 392         "#" + getSquareId(move.start) + " > img.piece"
 393       );
 394       // For some unknown reasons Opera get "movingPiece == null" error
 395       // TODO: is it calling 'animate()' twice ? One extra time ?
 396       if (!movingPiece) return;
 397       const squares = document.getElementsByClassName("board");
 398       for (let i = 0; i < squares.length; i++) {
 399         let square = squares.item(i);
 400         if (square.id != getSquareId(move.start))
 401           // HACK for animation:
 402           // (with positive translate, image slides "under background")
 403           square.style.zIndex = "-1";
 404       }
 405       movingPiece.style.transform =
 406         "translate(" + translation.x + "px," + translation.y + "px)";
 407       movingPiece.style.transitionDuration = "0.25s";
 408       movingPiece.style.zIndex = "3000";
 409       setTimeout(() => {
 410         for (let i = 0; i < squares.length; i++)
 411           squares.item(i).style.zIndex = "auto";
 412         movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 413         callback();
 414       }, 250);
 415     },
 416     // For Analyse mode:
 417     emitFenIfAnalyze: function() {
 418       if (this.game.mode == "analyze") {
 419         let fen = this.game.fenStart;
 420         if (!!this.lastMove) {
 421           if (Array.isArray(this.lastMove)) {
 422             const L = this.lastMove.length;
 423             fen = this.lastMove[L-1].fen;
 424           }
 425           else fen = this.lastMove.fen;
 426         }
 427         this.$emit("fenchange", fen);
 428       }
 429     },
 430     clickSquare: function(square) {
 431       // Some variants make use of a single click at specific times:
 432       const move = this.vr.doClick(square);
 433       if (!!move) this.play(move);
 434     },
 435     // "light": if gotoMove() or gotoEnd()
 436     play: function(move, received, light, autoplay) {
 437       // Freeze while choices are shown:
 438       if (
 439         !!this.$refs["board"].selectedPiece ||
 440         this.$refs["board"].choices.length > 0
 441       ) {
 442         return;
 443       }
 444       const navigate = !move;
 445       // Forbid navigation during autoplay:
 446       if (navigate && this.autoplay && !autoplay) return;
 447       // Forbid playing outside analyze mode, except if move is received.
 448       // Sufficient condition because Board already knows which turn it is.
 449       if (
 450         this.mode != "analyze" &&
 451         !navigate &&
 452         !received &&
 453         (this.game.score != "*" || this.cursor < this.moves.length - 1)
 454       ) {
 455         return;
 456       }
 457       if (!!received) {
 458         if (this.autoplay || this.inPlay) {
 459           // Received moves while autoplaying are stacked,
 460           // and in observed games they could arrive too fast:
 461           this.stackToPlay.unshift(move);
 462           return;
 463         }
 464         this.inPlay = true;
 465         if (this.mode == "analyze") this.toggleAnalyze();
 466         if (this.cursor < this.moves.length - 1)
 467           // To play a received move, cursor must be at the end of the game:
 468           this.gotoEnd();
 469       }
 470       // The board may show some possible moves: (TODO: bad solution)
 471       this.$refs["board"].resetCurrentAttempt();
 472       const playSubmove = (smove) => {
 473         smove.notation = this.vr.getNotation(smove);
 474         smove.unambiguous = V.GetUnambiguousNotation(smove);
 475         this.vr.play(smove);
 476         if (this.inMultimove && !!this.lastMove) {
 477           if (!Array.isArray(this.lastMove))
 478             this.lastMove = [this.lastMove, smove];
 479           else this.lastMove.push(smove);
 480         }
 481         // Is opponent (or me) in check?
 482         this.incheck = this.vr.getCheckSquares();
 483         if (this.incheck.length > 0) smove.notation += "+";
 484         if (!this.inMultimove) {
 485           // First sub-move:
 486           this.lastMove = smove;
 487           // Condition is "!navigate" but we mean "!this.autoplay"
 488           if (!navigate) {
 489             if (this.cursor < this.moves.length - 1)
 490               this.moves = this.moves.slice(0, this.cursor + 1);
 491             this.moves.push(smove);
 492           }
 493           this.inMultimove = true; //potentially
 494           this.cursor++;
 495         } else if (!navigate) {
 496           // Already in the middle of a multi-move
 497           const L = this.moves.length;
 498           if (!Array.isArray(this.moves[L-1]))
 499             this.$set(this.moves, L-1, [this.moves[L-1], smove]);
 500           else this.moves[L-1].push(smove);
 501         }
 502       };
 503       const playMove = () => {
 504         const animate = (
 505           ["all", "highlight"].includes(V.ShowMoves) &&
 506           (this.autoplay || !!received)
 507         );
 508         if (!Array.isArray(move)) move = [move];
 509         let moveIdx = 0;
 510         let self = this;
 511         const initurn = this.vr.turn;
 512         (function executeMove() {
 513           const smove = move[moveIdx++];
 514           // NOTE: condition "smove.start.x >= 0" required for Dynamo,
 515           // because second move may be empty.
 516           if (animate && smove.start.x >= 0) {
 517             self.animateMove(smove, () => {
 518               playSubmove(smove);
 519               if (moveIdx < move.length) setTimeout(executeMove, 500);
 520               else afterMove(smove, initurn);
 521             });
 522           } else {
 523             playSubmove(smove);
 524             if (moveIdx < move.length) executeMove();
 525             else afterMove(smove, initurn);
 526           }
 527         })();
 528       };
 529       const computeScore = () => {
 530         const score = this.vr.getCurrentScore();
 531         if (!navigate) {
 532           if (["1-0", "0-1"].includes(score)) {
 533             if (Array.isArray(this.lastMove)) {
 534               const L = this.lastMove.length;
 535               this.lastMove[L - 1].notation += "#";
 536             }
 537             else this.lastMove.notation += "#";
 538           }
 539         }
 540         if (score != "*" && ["analyze", "versus"].includes(this.mode)) {
 541           const message = getScoreMessage(score);
 542           // Show score on screen
 543           this.showEndgameMsg(score + " . " + this.st.tr[message]);
 544         }
 545         return score;
 546       };
 547       const afterMove = (smove, initurn) => {
 548         if (this.vr.turn != initurn) {
 549           // Turn has changed: move is complete
 550           if (!smove.fen)
 551             // NOTE: only FEN of last sub-move is required (=> setting it here)
 552             smove.fen = this.vr.getFen();
 553           this.emitFenIfAnalyze();
 554           this.inMultimove = false;
 555           this.score = computeScore();
 556           if (this.autoplay) {
 557             if (this.cursor < this.moves.length - 1)
 558               setTimeout(() => this.play(null, null, null, "autoplay"), 1000);
 559             else {
 560               this.autoplay = false;
 561               if (this.stackToPlay.length > 0)
 562                 // Move(s) arrived in-between
 563                 this.play(this.stackToPlay.pop(), "received");
 564             }
 565           }
 566           if (this.mode != "analyze" && !navigate) {
 567             if (!received) {
 568               // Post-processing (e.g. computer play).
 569               const L = this.moves.length;
 570               // NOTE: always emit the score, even in unfinished
 571               this.$emit("newmove", this.moves[L-1], { score: this.score });
 572             } else {
 573               this.inPlay = false;
 574               if (this.stackToPlay.length > 0)
 575                 // Move(s) arrived in-between
 576                 this.play(this.stackToPlay.pop(), "received");
 577             }
 578           }
 579         }
 580       };
 581       // NOTE: navigate and received are mutually exclusive
 582       if (navigate) {
 583         // The move to navigate to is necessarily full:
 584         if (this.cursor == this.moves.length - 1) return; //no more moves
 585         move = this.moves[this.cursor + 1];
 586         if (!this.autoplay) {
 587           // Just play the move:
 588           if (!Array.isArray(move)) move = [move];
 589           for (let i=0; i < move.length; i++) this.vr.play(move[i]);
 590           if (!light) {
 591             this.lastMove = move;
 592             this.incheck = this.vr.getCheckSquares();
 593             this.score = computeScore();
 594             this.emitFenIfAnalyze();
 595           }
 596           this.cursor++;
 597           return;
 598         }
 599       }
 600       playMove();
 601     },
 602     cancelCurrentMultimove: function() {
 603       const L = this.moves.length;
 604       let move = this.moves[L-1];
 605       if (!Array.isArray(move)) move = [move];
 606       for (let i = move.length - 1; i >= 0; i--) this.vr.undo(move[i]);
 607       this.moves.pop();
 608       this.cursor--;
 609       this.inMultimove = false;
 610     },
 611     cancelLastMove: function() {
 612       // The last played move was canceled (corr game)
 613       this.undo();
 614       this.moves.pop();
 615     },
 616     // "light": if gotoMove() or gotoBegin()
 617     undo: function(move, light) {
 618       if (
 619         this.autoplay ||
 620         !!this.$refs["board"].selectedPiece ||
 621         this.$refs["board"].choices.length > 0
 622       ) {
 623         return;
 624       }
 625       this.$refs["board"].resetCurrentAttempt();
 626       if (this.inMultimove) {
 627         this.cancelCurrentMultimove();
 628         this.incheck = this.vr.getCheckSquares();
 629         if (this.cursor >= 0) this.lastMove = this.moves[this.cursor];
 630         else this.lastMove = null;
 631       } else {
 632         if (!move) {
 633           const minCursor =
 634             this.moves.length > 0 && this.moves[0].notation == "..."
 635               ? 1
 636               : 0;
 637           if (this.cursor < minCursor) return; //no more moves
 638           move = this.moves[this.cursor];
 639         }
 640         this.$refs["board"].resetCurrentAttempt();
 641         undoMove(move, this.vr);
 642         if (light) this.cursor--;
 643         else {
 644           this.positionCursorTo(this.cursor - 1);
 645           this.incheck = this.vr.getCheckSquares();
 646           this.emitFenIfAnalyze();
 647         }
 648       }
 649     },
 650     gotoMove: function(index) {
 651       if (
 652         this.autoplay ||
 653         !!this.$refs["board"].selectedPiece ||
 654         this.$refs["board"].choices.length > 0
 655       ) {
 656         return;
 657       }
 658       this.$refs["board"].resetCurrentAttempt();
 659       if (this.inMultimove) this.cancelCurrentMultimove();
 660       if (index == this.cursor) return;
 661       if (index < this.cursor) {
 662         while (this.cursor > index)
 663           this.undo(null, null, "light");
 664       }
 665       else {
 666         // index > this.cursor)
 667         while (this.cursor < index)
 668           this.play(null, null, "light");
 669       }
 670       // NOTE: next line also re-assign cursor, but it's very light
 671       this.positionCursorTo(index);
 672       this.incheck = this.vr.getCheckSquares();
 673       this.emitFenIfAnalyze();
 674     },
 675     gotoBegin: function() {
 676       if (
 677         this.autoplay ||
 678         !!this.$refs["board"].selectedPiece ||
 679         this.$refs["board"].choices.length > 0
 680       ) {
 681         return;
 682       }
 683       this.$refs["board"].resetCurrentAttempt();
 684       if (this.inMultimove) this.cancelCurrentMultimove();
 685       const minCursor =
 686         this.moves.length > 0 && this.moves[0].notation == "..."
 687           ? 1
 688           : 0;
 689       while (this.cursor >= minCursor) this.undo(null, null, "light");
 690       this.lastMove = (minCursor == 1 ? this.moves[0] : null);
 691       this.incheck = this.vr.getCheckSquares();
 692       this.emitFenIfAnalyze();
 693     },
 694     gotoEnd: function() {
 695       if (this.cursor == this.moves.length - 1) return;
 696       this.gotoMove(this.moves.length - 1);
 697     },
 698     flip: function() {
 699       if (this.$refs["board"].choices.length > 0) return;
 700       this.orientation = V.GetOppCol(this.orientation);
 701     }
 702   }
 703 };
 704 </script>
 705
 706 <style lang="sass" scoped>
 707 [type="checkbox"]#modalEog+div .card
 708   min-height: 45px
 709   max-width: 350px
 710
 711 #baseGame
 712   width: 100%
 713   &:focus
 714     outline: none
 715
 716 #gameContainer
 717   margin-left: auto
 718   margin-right: auto
 719
 720 #downloadDiv
 721   display: inline-block
 722
 723 #controls
 724   user-select: none
 725   button
 726     border: none
 727     margin: 0
 728     padding-top: 5px
 729     padding-bottom: 5px
 730
 731 p#fenAnalyze
 732   margin: 5px
 733
 734 .in-autoplay
 735   background-color: #FACF8C
 736
 737 img.inline
 738   height: 22px
 739   padding-top: 5px
 740   @media screen and (max-width: 767px)
 741     height: 18px
 742
 743 #turnIndicator
 744   text-align: center
 745   font-weight: bold
 746
 747 #boardContainer
 748   float: left
 749 // TODO: later, maybe, allow movesList of variable width
 750 // or e.g. between 250 and 350px (but more complicated)
 751
 752 #movesList
 753   width: 280px
 754   float: left
 755
 756 @media screen and (max-width: 767px)
 757   #movesList
 758     width: 100%
 759     float: none
 760     clear: both
 761 </style>