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