client/src/components/Board.vue

   1 <script>
   2 // TODO: BoardHex for hexagonal variants (2 players)
   3
   4 import { getSquareId, getSquareFromId } from "@/utils/squareId";
   5 import { ArrayFun } from "@/utils/array";
   6
   7 export default {
   8   name: 'my-board',
   9   // Last move cannot be guessed from here, and is required to highlight squares
  10   // vr: object to check moves, print board...
  11   // userColor is left undefined for an external observer
  12   props: ["vr","lastMove","analyze","orientation","userColor","vname"],
  13   data: function () {
  14     return {
  15       hints: (!localStorage["hints"] ? true : localStorage["hints"] === "1"),
  16       bcolor: localStorage["bcolor"] || "lichess", //lichess, chesscom or chesstempo
  17       possibleMoves: [], //filled after each valid click/dragstart
  18       choices: [], //promotion pieces, or checkered captures... (as moves)
  19       selectedPiece: null, //moving piece (or clicked piece)
  20       incheck: [],
  21       start: {}, //pixels coordinates + id of starting square (click or drag)
  22     };
  23   },
  24   render(h) {
  25     if (!this.vr)
  26       return;
  27     const [sizeX,sizeY] = [V.size.x,V.size.y];
  28     // Precompute hints squares to facilitate rendering
  29     let hintSquares = ArrayFun.init(sizeX, sizeY, false);
  30     this.possibleMoves.forEach(m => { hintSquares[m.end.x][m.end.y] = true; });
  31     // Also precompute in-check squares
  32     let incheckSq = ArrayFun.init(sizeX, sizeY, false);
  33     this.incheck.forEach(sq => { incheckSq[sq[0]][sq[1]] = true; });
  34     const squareWidth = 40; //TODO: compute this
  35     const choices = h(
  36       'div',
  37       {
  38         attrs: { "id": "choices" },
  39         'class': { 'row': true },
  40         style: {
  41           "display": (this.choices.length > 0 ? "block" : "none"),
  42           "top": "-" + ((sizeY/2)*squareWidth+squareWidth/2) + "px",
  43           "width": (this.choices.length * squareWidth) + "px",
  44           "height": squareWidth + "px",
  45         },
  46       },
  47       this.choices.map(m => { //a "choice" is a move
  48         return h('div',
  49           {
  50             'class': {
  51               'board': true,
  52               ['board'+sizeY]: true,
  53             },
  54             style: {
  55               'width': (100/this.choices.length) + "%",
  56               'padding-bottom': (100/this.choices.length) + "%",
  57             },
  58           },
  59           [h('img',
  60             {
  61               attrs: { "src": '/images/pieces/' +
  62                 V.getPpath(m.appear[0].c+m.appear[0].p) + '.svg' },
  63               'class': { 'choice-piece': true },
  64               on: {
  65                 "click": e => { this.play(m); this.choices=[]; },
  66                 // NOTE: add 'touchstart' event to fix a problem on smartphones
  67                 "touchstart": e => { this.play(m); this.choices=[]; },
  68               },
  69             })
  70           ]
  71         );
  72       })
  73     );
  74     // Create board element (+ reserves if needed by variant or mode)
  75     const lm = this.lastMove;
  76     const showLight = this.hints && this.vname != "Dark";
  77     const gameDiv = h(
  78       'div',
  79       {
  80         'class': {
  81           'game': true,
  82           'clearer': true,
  83         },
  84       },
  85       [...Array(sizeX).keys()].map(i => {
  86         let ci = (this.orientation=='w' ? i : sizeX-i-1);
  87         return h(
  88           'div',
  89           {
  90             'class': {
  91               'row': true,
  92             },
  93             style: { 'opacity': this.choices.length>0?"0.5":"1" },
  94           },
  95           [...Array(sizeY).keys()].map(j => {
  96             let cj = (this.orientation=='w' ? j : sizeY-j-1);
  97             let elems = [];
  98             if (this.vr.board[ci][cj] != V.EMPTY && (this.vname!="Dark"
  99               || this.analyze || (!!this.userColor
 100                 && this.vr.enlightened[this.userColor][ci][cj])))
 101             {
 102               elems.push(
 103                 h(
 104                   'img',
 105                   {
 106                     'class': {
 107                       'piece': true,
 108                       'ghost': !!this.selectedPiece
 109                         && this.selectedPiece.parentNode.id == "sq-"+ci+"-"+cj,
 110                     },
 111                     attrs: {
 112                       src: "/images/pieces/" +
 113                         V.getPpath(this.vr.board[ci][cj]) + ".svg",
 114                     },
 115                   }
 116                 )
 117               );
 118             }
 119             if (this.hints && hintSquares[ci][cj])
 120             {
 121               elems.push(
 122                 h(
 123                   'img',
 124                   {
 125                     'class': {
 126                       'mark-square': true,
 127                     },
 128                     attrs: {
 129                       src: "/images/mark.svg",
 130                     },
 131                   }
 132                 )
 133               );
 134             }
 135             return h(
 136               'div',
 137               {
 138                 'class': {
 139                   'board': true,
 140                   ['board'+sizeY]: true,
 141                   'light-square': (i+j)%2==0,
 142                   'dark-square': (i+j)%2==1,
 143                   [this.bcolor]: true,
 144                   'in-shadow': this.vname=="Dark" && !this.analyze
 145                     && (!this.userColor
 146                       || !this.vr.enlightened[this.userColor][ci][cj]),
 147                   'highlight': showLight && !!lm && lm.end.x == ci && lm.end.y == cj,
 148                   'incheck': showLight && incheckSq[ci][cj],
 149                 },
 150                 attrs: {
 151                   id: getSquareId({x:ci,y:cj}),
 152                 },
 153               },
 154               elems
 155             );
 156           })
 157         );
 158       })
 159     );
 160     const playingColor = this.userColor || "w"; //default for an observer
 161     let elementArray = [choices, gameDiv];
 162     if (!!this.vr.reserve)
 163     {
 164       const shiftIdx = (playingColor=="w" ? 0 : 1);
 165       let myReservePiecesArray = [];
 166       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 167       {
 168         myReservePiecesArray.push(h('div',
 169         {
 170           'class': {'board':true, ['board'+sizeY]:true},
 171           attrs: { id: getSquareId({x:sizeX+shiftIdx,y:i}) }
 172         },
 173         [
 174           h('img',
 175           {
 176             'class': {"piece":true, "reserve":true},
 177             attrs: {
 178               "src": "/images/pieces/" +
 179                 this.vr.getReservePpath(playingColor,i) + ".svg",
 180             }
 181           }),
 182           h('sup',
 183             {"class": { "reserve-count": true } },
 184             [ this.vr.reserve[playingColor][V.RESERVE_PIECES[i]] ]
 185           )
 186         ]));
 187       }
 188       let oppReservePiecesArray = [];
 189       const oppCol = V.GetOppCol(playingColor);
 190       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 191       {
 192         oppReservePiecesArray.push(h('div',
 193         {
 194           'class': {'board':true, ['board'+sizeY]:true},
 195           attrs: { id: getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
 196         },
 197         [
 198           h('img',
 199           {
 200             'class': {"piece":true, "reserve":true},
 201             attrs: {
 202               "src": "/images/pieces/" +
 203                 this.vr.getReservePpath(oppCol,i) + ".svg",
 204             }
 205           }),
 206           h('sup',
 207             {"class": { "reserve-count": true } },
 208             [ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
 209           )
 210         ]));
 211       }
 212       let reserves = h('div',
 213         {
 214           'class':{
 215             'game': true,
 216             "reserve-div": true,
 217           },
 218         },
 219         [
 220           h('div',
 221             {
 222               'class': {
 223                 'row': true,
 224                 "reserve-row-1": true,
 225               },
 226             },
 227             myReservePiecesArray
 228           ),
 229           h('div',
 230             { 'class': { 'row': true }},
 231             oppReservePiecesArray
 232           )
 233         ]
 234       );
 235       elementArray.push(reserves);
 236     }
 237     return h(
 238       'div',
 239       {
 240         'class': {
 241           "col-sm-12": true,
 242           "col-md-10": true,
 243           "col-md-offset-1": true,
 244           "col-lg-8": true,
 245           "col-lg-offset-2": true,
 246         },
 247         // NOTE: click = mousedown + mouseup
 248         on: {
 249           mousedown: this.mousedown,
 250           mousemove: this.mousemove,
 251           mouseup: this.mouseup,
 252           touchstart: this.mousedown,
 253           touchmove: this.mousemove,
 254           touchend: this.mouseup,
 255         },
 256       },
 257       elementArray
 258     );
 259   },
 260   methods: {
 261     mousedown: function(e) {
 262       e = e || window.event;
 263       let ingame = false;
 264       let elem = e.target;
 265       while (!ingame && elem !== null)
 266       {
 267         if (elem.classList.contains("game"))
 268         {
 269           ingame = true;
 270           break;
 271         }
 272         elem = elem.parentElement;
 273       }
 274       if (!ingame) //let default behavior (click on button...)
 275         return;
 276       e.preventDefault(); //disable native drag & drop
 277       if (!this.selectedPiece && e.target.classList.contains("piece"))
 278       {
 279         // Next few lines to center the piece on mouse cursor
 280         let rect = e.target.parentNode.getBoundingClientRect();
 281         this.start = {
 282           x: rect.x + rect.width/2,
 283           y: rect.y + rect.width/2,
 284           id: e.target.parentNode.id
 285         };
 286         this.selectedPiece = e.target.cloneNode();
 287         this.selectedPiece.style.position = "absolute";
 288         this.selectedPiece.style.top = 0;
 289         this.selectedPiece.style.display = "inline-block";
 290         this.selectedPiece.style.zIndex = 3000;
 291         const startSquare = getSquareFromId(e.target.parentNode.id);
 292         this.possibleMoves = [];
 293         const color = (this.analyze ? this.vr.turn : this.userColor);
 294         if (this.vr.canIplay(color,startSquare))
 295           this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
 296         // Next line add moving piece just after current image
 297         // (required for Crazyhouse reserve)
 298         e.target.parentNode.insertBefore(this.selectedPiece, e.target.nextSibling);
 299       }
 300     },
 301     mousemove: function(e) {
 302       if (!this.selectedPiece)
 303         return;
 304       e = e || window.event;
 305       // If there is an active element, move it around
 306       if (!!this.selectedPiece)
 307       {
 308         const [offsetX,offsetY] = !!e.clientX
 309           ? [e.clientX,e.clientY] //desktop browser
 310           : [e.changedTouches[0].pageX, e.changedTouches[0].pageY]; //smartphone
 311         this.selectedPiece.style.left = (offsetX-this.start.x) + "px";
 312         this.selectedPiece.style.top = (offsetY-this.start.y) + "px";
 313       }
 314     },
 315     mouseup: function(e) {
 316       if (!this.selectedPiece)
 317         return;
 318       e = e || window.event;
 319       // Read drop target (or parentElement, parentNode... if type == "img")
 320       this.selectedPiece.style.zIndex = -3000; //HACK to find square from final coords
 321       const [offsetX,offsetY] = !!e.clientX
 322         ? [e.clientX,e.clientY]
 323         : [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
 324       let landing = document.elementFromPoint(offsetX, offsetY);
 325       this.selectedPiece.style.zIndex = 3000;
 326       // Next condition: classList.contains(piece) fails because of marks
 327       while (landing.tagName == "IMG")
 328         landing = landing.parentNode;
 329       if (this.start.id == landing.id)
 330       {
 331         // A click: selectedPiece and possibleMoves are already filled
 332         return;
 333       }
 334       // OK: process move attempt
 335       let endSquare = getSquareFromId(landing.id);
 336       let moves = this.findMatchingMoves(endSquare);
 337       this.possibleMoves = [];
 338       if (moves.length > 1)
 339         this.choices = moves;
 340       else if (moves.length==1)
 341         this.play(moves[0]);
 342       // Else: impossible move
 343       this.selectedPiece.parentNode.removeChild(this.selectedPiece);
 344       delete this.selectedPiece;
 345       this.selectedPiece = null;
 346     },
 347     findMatchingMoves: function(endSquare) {
 348       // Run through moves list and return the matching set (if promotions...)
 349       let moves = [];
 350       this.possibleMoves.forEach(function(m) {
 351         if (endSquare[0] == m.end.x && endSquare[1] == m.end.y)
 352           moves.push(m);
 353       });
 354       return moves;
 355     },
 356     play: function(move) {
 357       this.$emit('play-move', move);
 358     },
 359   },
 360 };
 361 </script>
 362
 363 <style lang="sass">
 364 .game.reserve-div
 365   margin-bottom: 18px
 366
 367 .reserve-count
 368   padding-left: 40%
 369
 370 .reserve-row-1
 371   margin-bottom: 15px
 372
 373 // NOTE: no variants with reserve of size != 8
 374
 375 div.board
 376   float: left
 377   height: 0
 378   display: inline-block
 379   position: relative
 380
 381 div.board8
 382   width: 12.5%
 383   padding-bottom: 12.5%
 384
 385 div.board10
 386   width: 10%
 387   padding-bottom: 10%
 388
 389 div.board11
 390   width: 9.09%
 391   padding-bottom: 9.1%
 392
 393 .game
 394   width: 80vh
 395   margin: 0 auto
 396   .board
 397     cursor: pointer
 398   @media screen and (max-width: 767px)
 399     width: 100%
 400     margin: 0
 401
 402 #choices
 403   margin: 0 auto 0 auto
 404   position: relative
 405   z-index: 300
 406   overflow-y: inherit
 407   background-color: rgba(0,0,0,0)
 408   img
 409     cursor: pointer
 410     background-color: #e6ee9c
 411     &:hover
 412       background-color: skyblue
 413     &.choice-piece
 414       width: 100%
 415       height: auto
 416       display: block
 417
 418 img.piece
 419   width: 100%
 420
 421 img.piece, img.mark-square
 422   max-width: 100%
 423   height: auto
 424   display: block
 425
 426 img.mark-square
 427   opacity: 0.6
 428   width: 76%
 429   position: absolute
 430   top: 12%
 431   left: 12%
 432   opacity: .7
 433
 434 img.ghost
 435   position: absolute
 436   opacity: 0.4
 437   top: 0
 438
 439 .highlight
 440   background-color: #00cc66 !important
 441
 442 .in-shadow
 443   filter: brightness(50%)
 444
 445 .incheck
 446   background-color: #cc3300 !important
 447
 448 .light-square.lichess
 449   background-color: #f0d9b5;
 450 .dark-square.lichess
 451   background-color: #b58863;
 452
 453 .light-square.chesscom
 454   background-color: #e5e5ca;
 455 .dark-square.chesscom
 456   background-color: #6f8f57;
 457
 458 .light-square.chesstempo
 459   background-color: #fdfdfd;
 460 .dark-square.chesstempo
 461   background-color: #88a0a8;
 462 </style>