client/src/components/Board.vue

   1 <script>
   2 // TODO: for 3 or 4 players, write a "board3.js" (board4.js)
   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: for mode HH or HC
  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.gameOver || this.analyze
 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.gameOver
 145                     && !this.analyze && !this.vr.enlightened[this.userColor][ci][cj],
 146                   'highlight': showLight && !!lm && lm.end.x == ci && lm.end.y == cj,
 147                   'incheck': showLight && incheckSq[ci][cj],
 148                 },
 149                 attrs: {
 150                   id: getSquareId({x:ci,y:cj}),
 151                 },
 152               },
 153               elems
 154             );
 155           })
 156         );
 157       })
 158     );
 159     let elementArray = [choices, gameDiv];
 160     if (!!this.vr.reserve)
 161     {
 162       const shiftIdx = (this.userColor=="w" ? 0 : 1);
 163       let myReservePiecesArray = [];
 164       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 165       {
 166         myReservePiecesArray.push(h('div',
 167         {
 168           'class': {'board':true, ['board'+sizeY]:true},
 169           attrs: { id: getSquareId({x:sizeX+shiftIdx,y:i}) }
 170         },
 171         [
 172           h('img',
 173           {
 174             'class': {"piece":true, "reserve":true},
 175             attrs: {
 176               "src": "/images/pieces/" +
 177                 this.vr.getReservePpath(this.userColor,i) + ".svg",
 178             }
 179           }),
 180           h('sup',
 181             {"class": { "reserve-count": true } },
 182             [ this.vr.reserve[this.userColor][V.RESERVE_PIECES[i]] ]
 183           )
 184         ]));
 185       }
 186       let oppReservePiecesArray = [];
 187       const oppCol = V.GetOppCol(this.userColor);
 188       for (let i=0; i<V.RESERVE_PIECES.length; i++)
 189       {
 190         oppReservePiecesArray.push(h('div',
 191         {
 192           'class': {'board':true, ['board'+sizeY]:true},
 193           attrs: { id: getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
 194         },
 195         [
 196           h('img',
 197           {
 198             'class': {"piece":true, "reserve":true},
 199             attrs: {
 200               "src": "/images/pieces/" +
 201                 this.vr.getReservePpath(oppCol,i) + ".svg",
 202             }
 203           }),
 204           h('sup',
 205             {"class": { "reserve-count": true } },
 206             [ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
 207           )
 208         ]));
 209       }
 210       let reserves = h('div',
 211         {
 212           'class':{
 213             'game': true,
 214             "reserve-div": true,
 215           },
 216         },
 217         [
 218           h('div',
 219             {
 220               'class': {
 221                 'row': true,
 222                 "reserve-row-1": true,
 223               },
 224             },
 225             myReservePiecesArray
 226           ),
 227           h('div',
 228             { 'class': { 'row': true }},
 229             oppReservePiecesArray
 230           )
 231         ]
 232       );
 233       elementArray.push(reserves);
 234     }
 235     return h(
 236       'div',
 237       {
 238         'class': {
 239           "col-sm-12": true,
 240           "col-md-10": true,
 241           "col-md-offset-1": true,
 242           "col-lg-8": true,
 243           "col-lg-offset-2": true,
 244         },
 245         // NOTE: click = mousedown + mouseup
 246         on: {
 247           mousedown: this.mousedown,
 248           mousemove: this.mousemove,
 249           mouseup: this.mouseup,
 250           touchstart: this.mousedown,
 251           touchmove: this.mousemove,
 252           touchend: this.mouseup,
 253         },
 254       },
 255       elementArray
 256     );
 257   },
 258   methods: {
 259     mousedown: function(e) {
 260       e = e || window.event;
 261       let ingame = false;
 262       let elem = e.target;
 263       while (!ingame && elem !== null)
 264       {
 265         if (elem.classList.contains("game"))
 266         {
 267           ingame = true;
 268           break;
 269         }
 270         elem = elem.parentElement;
 271       }
 272       if (!ingame) //let default behavior (click on button...)
 273         return;
 274       e.preventDefault(); //disable native drag & drop
 275       if (!this.selectedPiece && e.target.classList.contains("piece"))
 276       {
 277         // Next few lines to center the piece on mouse cursor
 278         let rect = e.target.parentNode.getBoundingClientRect();
 279         this.start = {
 280           x: rect.x + rect.width/2,
 281           y: rect.y + rect.width/2,
 282           id: e.target.parentNode.id
 283         };
 284         this.selectedPiece = e.target.cloneNode();
 285         this.selectedPiece.style.position = "absolute";
 286         this.selectedPiece.style.top = 0;
 287         this.selectedPiece.style.display = "inline-block";
 288         this.selectedPiece.style.zIndex = 3000;
 289         const startSquare = getSquareFromId(e.target.parentNode.id);
 290         this.possibleMoves = [];
 291         const color = (this.analyze || this.gameOver ? this.vr.turn : this.userColor);
 292         if (this.vr.canIplay(color,startSquare))
 293           this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
 294         // Next line add moving piece just after current image
 295         // (required for Crazyhouse reserve)
 296         e.target.parentNode.insertBefore(this.selectedPiece, e.target.nextSibling);
 297       }
 298     },
 299     mousemove: function(e) {
 300       if (!this.selectedPiece)
 301         return;
 302       e = e || window.event;
 303       // If there is an active element, move it around
 304       if (!!this.selectedPiece)
 305       {
 306         const [offsetX,offsetY] = !!e.clientX
 307           ? [e.clientX,e.clientY] //desktop browser
 308           : [e.changedTouches[0].pageX, e.changedTouches[0].pageY]; //smartphone
 309         this.selectedPiece.style.left = (offsetX-this.start.x) + "px";
 310         this.selectedPiece.style.top = (offsetY-this.start.y) + "px";
 311       }
 312     },
 313     mouseup: function(e) {
 314       if (!this.selectedPiece)
 315         return;
 316       e = e || window.event;
 317       // Read drop target (or parentElement, parentNode... if type == "img")
 318       this.selectedPiece.style.zIndex = -3000; //HACK to find square from final coords
 319       const [offsetX,offsetY] = !!e.clientX
 320         ? [e.clientX,e.clientY]
 321         : [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
 322       let landing = document.elementFromPoint(offsetX, offsetY);
 323       this.selectedPiece.style.zIndex = 3000;
 324       // Next condition: classList.contains(piece) fails because of marks
 325       while (landing.tagName == "IMG")
 326         landing = landing.parentNode;
 327       if (this.start.id == landing.id)
 328       {
 329         // A click: selectedPiece and possibleMoves are already filled
 330         return;
 331       }
 332       // OK: process move attempt
 333       let endSquare = getSquareFromId(landing.id);
 334       let moves = this.findMatchingMoves(endSquare);
 335       this.possibleMoves = [];
 336       if (moves.length > 1)
 337         this.choices = moves;
 338       else if (moves.length==1)
 339         this.play(moves[0]);
 340       // Else: impossible move
 341       this.selectedPiece.parentNode.removeChild(this.selectedPiece);
 342       delete this.selectedPiece;
 343       this.selectedPiece = null;
 344     },
 345     findMatchingMoves: function(endSquare) {
 346       // Run through moves list and return the matching set (if promotions...)
 347       let moves = [];
 348       this.possibleMoves.forEach(function(m) {
 349         if (endSquare[0] == m.end.x && endSquare[1] == m.end.y)
 350           moves.push(m);
 351       });
 352       return moves;
 353     },
 354     play: function(move) {
 355       this.$emit('play-move', move);
 356     },
 357   },
 358 };
 359 </script>
 360
 361 <style lang="sass">
 362 .game.reserve-div
 363   margin-bottom: 18px
 364
 365 .reserve-count
 366   padding-left: 40%
 367
 368 .reserve-row-1
 369   margin-bottom: 15px
 370
 371 div.board
 372   float: left
 373   height: 0
 374   display: inline-block
 375   position: relative
 376
 377 div.board8
 378   width: 12.5%
 379   padding-bottom: 12.5%
 380
 381 div.board10
 382   width: 10%
 383   padding-bottom: 10%
 384
 385 div.board11
 386   width: 9.09%
 387   padding-bottom: 9.1%
 388
 389 // NOTE: no variants with reserve of size != 8
 390
 391 .game
 392   width: 80vh
 393   margin: 0 auto
 394   .board
 395     cursor: pointer
 396   @media screen and (max-width: 767px)
 397     width: 100%
 398     margin: 0
 399
 400 #choices
 401   margin: 0 auto 0 auto
 402   position: relative
 403   z-index: 300
 404   overflow-y: inherit
 405   background-color: rgba(0,0,0,0)
 406   img
 407     cursor: pointer
 408     background-color: #e6ee9c
 409     &:hover
 410       background-color: skyblue
 411     &.choice-piece
 412       width: 100%
 413       height: auto
 414       display: block
 415
 416 img.piece
 417   width: 100%
 418
 419 img.piece, img.mark-square
 420   max-width: 100%
 421   height: auto
 422   display: block
 423
 424 img.mark-square
 425   opacity: 0.6
 426   width: 76%
 427   position: absolute
 428   top: 12%
 429   left: 12%
 430   opacity: .7
 431
 432 img.ghost
 433   position: absolute
 434   opacity: 0.4
 435   top: 0
 436
 437 .highlight
 438   background-color: #00cc66 !important
 439
 440 .in-shadow
 441   filter: brightness(50%)
 442
 443 .incheck
 444   background-color: #cc3300 !important
 445
 446 .light-square.lichess
 447   background-color: #f0d9b5;
 448 .dark-square.lichess
 449   background-color: #b58863;
 450
 451 .light-square.chesscom
 452   background-color: #e5e5ca;
 453 .dark-square.chesscom
 454   background-color: #6f8f57;
 455
 456 .light-square.chesstempo
 457   background-color: #fdfdfd;
 458 .dark-square.chesstempo
 459   background-color: #88a0a8;
 460 </style>