client/src/components/Board.vue

   1 <script>
   2 // This can work for squared boards (2 or 4 players), with some adaptations (TODO)
   3 // TODO: for 3 players, write a "board3.js"
   4
   5 // TODO: current clicked square + moving square as parameters, + highlight
   6
   7 import { getSquareId, getSquareFromId } from "@/utils/squareId";
   8 import { ArrayFun } from "@/utils/array";
   9
  10 export default {
  11   name: 'my-board',
  12   // Last move cannot be guessed from here, and is required to highlight squares
  13   // vr: object to check moves, print board...
  14   // mode: HH, HC or analyze
  15   // userColor: for mode HH or HC
  16   props: ["vr","lastMove","mode","orientation","userColor","vname"],
  17   data: function () {
  18     return {
  19       hints: (!localStorage["hints"] ? true : localStorage["hints"] === "1"),
  20       bcolor: localStorage["bcolor"] || "lichess", //lichess, chesscom or chesstempo
  21       possibleMoves: [], //filled after each valid click/dragstart
  22       choices: [], //promotion pieces, or checkered captures... (as moves)
  23       selectedPiece: null, //moving piece (or clicked piece)
  24       incheck: [],
  25       start: {}, //pixels coordinates + id of starting square (click or drag)
  26     };
  27   },
  28   render(h) {
  29     if (!this.vr)
  30       return;
  31     const [sizeX,sizeY] = [V.size.x,V.size.y];
  32     // Precompute hints squares to facilitate rendering
  33     let hintSquares = ArrayFun.init(sizeX, sizeY, false);
  34     this.possibleMoves.forEach(m => { hintSquares[m.end.x][m.end.y] = true; });
  35     // Also precompute in-check squares
  36     let incheckSq = ArrayFun.init(sizeX, sizeY, false);
  37     this.incheck.forEach(sq => { incheckSq[sq[0]][sq[1]] = true; });
  38     const squareWidth = 40; //TODO: compute this
  39     const choices = h(
  40       'div',
  41       {
  42         attrs: { "id": "choices" },
  43         'class': { 'row': true },
  44         style: {
  45           "display": this.choices.length>0?"block":"none",
  46           "top": "-" + ((sizeY/2)*squareWidth+squareWidth/2) + "px",
  47           "width": (this.choices.length * squareWidth) + "px",
  48           "height": squareWidth + "px",
  49         },
  50       },
  51       this.choices.map(m => { //a "choice" is a move
  52         return h('div',
  53           {
  54             'class': {
  55               'board': true,
  56               ['board'+sizeY]: true,
  57             },
  58             style: {
  59               'width': (100/this.choices.length) + "%",
  60               'padding-bottom': (100/this.choices.length) + "%",
  61             },
  62           },
  63           [h('img',
  64             {
  65               attrs: { "src": '/images/pieces/' +
  66                 V.getPpath(m.appear[0].c+m.appear[0].p) + '.svg' },
  67               'class': { 'choice-piece': true },
  68               on: {
  69                 "click": e => { this.play(m); this.choices=[]; },
  70                 // NOTE: add 'touchstart' event to fix a problem on smartphones
  71                 "touchstart": e => { this.play(m); this.choices=[]; },
  72               },
  73             })
  74           ]
  75         );
  76       })
  77     );
  78     // Create board element (+ reserves if needed by variant or mode)
  79     const lm = this.lastMove;
  80     const showLight = this.hints && this.vname != "Dark";
  81     const gameDiv = h(
  82       'div',
  83       {
  84         'class': {
  85           'game': true,
  86           'clearer': true,
  87         },
  88       },
  89       [...Array(sizeX).keys()].map(i => {
  90         let ci = (this.orientation=='w' ? i : sizeX-i-1);
  91         return h(
  92           'div',
  93           {
  94             'class': {
  95               'row': true,
  96             },
  97             style: { 'opacity': this.choices.length>0?"0.5":"1" },
  98           },
  99           [...Array(sizeY).keys()].map(j => {
 100             let cj = (this.orientation=='w' ? j : sizeY-j-1);
 101             let elems = [];
 102             if (this.vr.board[ci][cj] != V.EMPTY && (this.vname!="Dark"
 103               || this.gameOver || this.mode == "analyze"
 104               || this.vr.enlightened[this.userColor][ci][cj]))
 105             {
 106               elems.push(
 107                 h(
 108                   'img',
 109                   {
 110                     'class': {
 111                       'piece': true,
 112                       'ghost': !!this.selectedPiece
 113                         && this.selectedPiece.parentNode.id == "sq-"+ci+"-"+cj,
 114                     },
 115                     attrs: {
 116                       src: "/images/pieces/" +
 117                         V.getPpath(this.vr.board[ci][cj]) + ".svg",
 118                     },
 119                   }
 120                 )
 121               );
 122             }
 123             if (this.hints && hintSquares[ci][cj])
 124             {
 125               elems.push(
 126                 h(
 127                   'img',
 128                   {
 129                     'class': {
 130                       'mark-square': true,
 131                     },
 132                     attrs: {
 133                       src: "/images/mark.svg",
 134                     },
 135                   }
 136                 )
 137               );
 138             }
 139             return h(
 140               'div',
 141               {
 142                 'class': {
 143                   'board': true,
 144                   ['board'+sizeY]: true,
 145                   'light-square': (i+j)%2==0,
 146                   'dark-square': (i+j)%2==1,
 147                   [this.bcolor]: true,
 148                   'in-shadow': this.vname=="Dark" && !this.gameOver
 149                     && this.mode != "analyze"
 150                     && !this.vr.enlightened[this.userColor][ci][cj],
 151                   'highlight': showLight && !!lm && lm.end.x == ci && lm.end.y == cj,
 152                   'incheck': showLight && incheckSq[ci][cj],
 153                 },
 154                 attrs: {
 155                   id: getSquareId({x:ci,y:cj}),
 156                 },
 157               },
 158               elems
 159             );
 160           })
 161         );
 162       })
 163     );
 164     let elementArray = [choices, gameDiv];
 165     if (!!this.vr.reserve)
 166     {
 167       const shiftIdx = (this.userColor=="w" ? 0 : 1);
 168       let myReservePiecesArray = [];
 169       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 170       {
 171         myReservePiecesArray.push(h('div',
 172         {
 173           'class': {'board':true, ['board'+sizeY]:true},
 174           attrs: { id: getSquareId({x:sizeX+shiftIdx,y:i}) }
 175         },
 176         [
 177           h('img',
 178           {
 179             'class': {"piece":true, "reserve":true},
 180             attrs: {
 181               "src": "/images/pieces/" +
 182                 this.vr.getReservePpath(this.userColor,i) + ".svg",
 183             }
 184           }),
 185           h('sup',
 186             {"class": { "reserve-count": true } },
 187             [ this.vr.reserve[this.userColor][V.RESERVE_PIECES[i]] ]
 188           )
 189         ]));
 190       }
 191       let oppReservePiecesArray = [];
 192       const oppCol = V.GetOppCol(this.userColor);
 193       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 194       {
 195         oppReservePiecesArray.push(h('div',
 196         {
 197           'class': {'board':true, ['board'+sizeY]:true},
 198           attrs: { id: getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
 199         },
 200         [
 201           h('img',
 202           {
 203             'class': {"piece":true, "reserve":true},
 204             attrs: {
 205               "src": "/images/pieces/" +
 206                 this.vr.getReservePpath(oppCol,i) + ".svg",
 207             }
 208           }),
 209           h('sup',
 210             {"class": { "reserve-count": true } },
 211             [ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
 212           )
 213         ]));
 214       }
 215       let reserves = h('div',
 216         {
 217           'class':{
 218             'game': true,
 219             "reserve-div": true,
 220           },
 221         },
 222         [
 223           h('div',
 224             {
 225               'class': {
 226                 'row': true,
 227                 "reserve-row-1": true,
 228               },
 229             },
 230             myReservePiecesArray
 231           ),
 232           h('div',
 233             { 'class': { 'row': true }},
 234             oppReservePiecesArray
 235           )
 236         ]
 237       );
 238       elementArray.push(reserves);
 239     }
 240     return h(
 241       'div',
 242       {
 243         'class': {
 244           "col-sm-12": true,
 245           "col-md-10": true,
 246           "col-md-offset-1": true,
 247           "col-lg-8": true,
 248           "col-lg-offset-2": true,
 249         },
 250         // NOTE: click = mousedown + mouseup
 251         on: {
 252           mousedown: this.mousedown,
 253           mousemove: this.mousemove,
 254           mouseup: this.mouseup,
 255           touchstart: this.mousedown,
 256           touchmove: this.mousemove,
 257           touchend: this.mouseup,
 258         },
 259       },
 260       elementArray
 261     );
 262   },
 263   methods: {
 264     mousedown: function(e) {
 265       e = e || window.event;
 266       let ingame = false;
 267       let elem = e.target;
 268       while (!ingame && elem !== null)
 269       {
 270         if (elem.classList.contains("game"))
 271         {
 272           ingame = true;
 273           break;
 274         }
 275         elem = elem.parentElement;
 276       }
 277       if (!ingame) //let default behavior (click on button...)
 278         return;
 279       e.preventDefault(); //disable native drag & drop
 280       if (!this.selectedPiece && e.target.classList.contains("piece"))
 281       {
 282         // Next few lines to center the piece on mouse cursor
 283         let rect = e.target.parentNode.getBoundingClientRect();
 284         this.start = {
 285           x: rect.x + rect.width/2,
 286           y: rect.y + rect.width/2,
 287           id: e.target.parentNode.id
 288         };
 289         this.selectedPiece = e.target.cloneNode();
 290         this.selectedPiece.style.position = "absolute";
 291         this.selectedPiece.style.top = 0;
 292         this.selectedPiece.style.display = "inline-block";
 293         this.selectedPiece.style.zIndex = 3000;
 294         const startSquare = getSquareFromId(e.target.parentNode.id);
 295         this.possibleMoves = [];
 296         const color = this.mode=="analyze" || this.gameOver
 297           ? this.vr.turn
 298           : this.userColor;
 299         if (this.vr.canIplay(color,startSquare))
 300           this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
 301         // Next line add moving piece just after current image
 302         // (required for Crazyhouse reserve)
 303         e.target.parentNode.insertBefore(this.selectedPiece, e.target.nextSibling);
 304       }
 305     },
 306     mousemove: function(e) {
 307       if (!this.selectedPiece)
 308         return;
 309       e = e || window.event;
 310       // If there is an active element, move it around
 311       if (!!this.selectedPiece)
 312       {
 313         const [offsetX,offsetY] = !!e.clientX
 314           ? [e.clientX,e.clientY] //desktop browser
 315           : [e.changedTouches[0].pageX, e.changedTouches[0].pageY]; //smartphone
 316         this.selectedPiece.style.left = (offsetX-this.start.x) + "px";
 317         this.selectedPiece.style.top = (offsetY-this.start.y) + "px";
 318       }
 319     },
 320     mouseup: function(e) {
 321       if (!this.selectedPiece)
 322         return;
 323       e = e || window.event;
 324       // Read drop target (or parentElement, parentNode... if type == "img")
 325       this.selectedPiece.style.zIndex = -3000; //HACK to find square from final coords
 326       const [offsetX,offsetY] = !!e.clientX
 327         ? [e.clientX,e.clientY]
 328         : [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
 329       let landing = document.elementFromPoint(offsetX, offsetY);
 330       this.selectedPiece.style.zIndex = 3000;
 331       // Next condition: classList.contains(piece) fails because of marks
 332       while (landing.tagName == "IMG")
 333         landing = landing.parentNode;
 334       if (this.start.id == landing.id)
 335       {
 336         // A click: selectedPiece and possibleMoves are already filled
 337         return;
 338       }
 339       // OK: process move attempt
 340       let endSquare = getSquareFromId(landing.id);
 341       let moves = this.findMatchingMoves(endSquare);
 342       this.possibleMoves = [];
 343       if (moves.length > 1)
 344         this.choices = moves;
 345       else if (moves.length==1)
 346         this.play(moves[0]);
 347       // Else: impossible move
 348       this.selectedPiece.parentNode.removeChild(this.selectedPiece);
 349       delete this.selectedPiece;
 350       this.selectedPiece = null;
 351     },
 352     findMatchingMoves: function(endSquare) {
 353       // Run through moves list and return the matching set (if promotions...)
 354       let moves = [];
 355       this.possibleMoves.forEach(function(m) {
 356         if (endSquare[0] == m.end.x && endSquare[1] == m.end.y)
 357           moves.push(m);
 358       });
 359       return moves;
 360     },
 361     play: function(move) {
 362       this.$emit('play-move', move);
 363     },
 364   },
 365 };
 366 </script>
 367
 368 <style lang="sass">
 369 .game.reserve-div
 370   margin-bottom: 18px
 371
 372 .reserve-count
 373   padding-left: 40%
 374
 375 .reserve-row-1
 376   margin-bottom: 15px
 377
 378 div.board
 379   float: left
 380   height: 0
 381   display: inline-block
 382   position: relative
 383
 384 div.board8
 385   width: 12.5%
 386   padding-bottom: 12.5%
 387
 388 div.board10
 389   width: 10%
 390   padding-bottom: 10%
 391
 392 div.board11
 393   width: 9.09%
 394   padding-bottom: 9.1%
 395
 396 // NOTE: no variants with reserve of size != 8
 397
 398 .game
 399   width: 80vh
 400   margin: 0 auto
 401   .board
 402     cursor: pointer
 403   @media screen and (max-width: 767px)
 404     width: 100%
 405     margin: 0
 406
 407 #choices
 408   margin: 0 auto 0 auto
 409   position: relative
 410   z-index: 300
 411   overflow-y: inherit
 412   background-color: rgba(0,0,0,0)
 413   img
 414     cursor: pointer
 415     background-color: #e6ee9c
 416     &:hover
 417       background-color: skyblue
 418     &.choice-piece
 419       width: 100%
 420       height: auto
 421       display: block
 422
 423 img.piece
 424   width: 100%
 425
 426 img.piece, img.mark-square
 427   max-width: 100%
 428   height: auto
 429   display: block
 430
 431 img.mark-square
 432   opacity: 0.6
 433   width: 76%
 434   position: absolute
 435   top: 12%
 436   left: 12%
 437   opacity: .7
 438
 439 img.ghost
 440   position: absolute
 441   opacity: 0.4
 442   top: 0
 443
 444 .highlight
 445   background-color: #00cc66 !important
 446
 447 .in-shadow
 448   filter: brightness(50%)
 449
 450 .incheck
 451   background-color: #cc3300 !important
 452
 453 .light-square.lichess
 454   background-color: #f0d9b5;
 455 .dark-square.lichess
 456   background-color: #b58863;
 457
 458 .light-square.chesscom
 459   background-color: #e5e5ca;
 460 .dark-square.chesscom
 461   background-color: #6f8f57;
 462
 463 .light-square.chesstempo
 464   background-color: #fdfdfd;
 465 .dark-square.chesstempo
 466   background-color: #88a0a8;
 467 </style>