client/src/components/Board.vue

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