client/src/components/Board.vue

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