2 import { getSquareId, getSquareFromId } from "@/utils/squareId";
3 import { ArrayFun } from "@/utils/array";
4 import { store } from "@/store";
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","incheck","orientation","userColor","vname"],
13 possibleMoves: [], //filled after each valid click/dragstart
14 choices: [], //promotion pieces, or checkered captures... (as moves)
15 selectedPiece: null, //moving piece (or clicked piece)
16 start: {}, //pixels coordinates + id of starting square (click or drag)
17 settings: store.state.settings,
23 // Return empty div of class 'game' to avoid error when setting size
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; });
39 let boardElt = document.querySelector(".game");
40 const squareWidth = (!!boardElt
41 ? boardElt.offsetWidth / sizeY
42 : 40); //arbitrary value (not relevant)
43 const offset = (!!boardElt
44 ? [boardElt.offsetTop, boardElt.offsetLeft]
46 // Create board element (+ reserves if needed by variant or mode)
47 const lm = this.lastMove;
48 const showLight = this.settings.highlight && this.vname != "Dark";
57 [...Array(sizeX).keys()].map(i => {
58 let ci = (this.orientation=='w' ? i : sizeX-i-1);
65 style: { 'opacity': this.choices.length>0?"0.5":"1" },
67 [...Array(sizeY).keys()].map(j => {
68 let cj = (this.orientation=='w' ? j : sizeY-j-1);
70 if (this.vr.board[ci][cj] != V.EMPTY && (this.vname!="Dark"
71 || this.analyze || (!!this.userColor
72 && this.vr.enlightened[this.userColor][ci][cj])))
80 'ghost': !!this.selectedPiece
81 && this.selectedPiece.parentNode.id == "sq-"+ci+"-"+cj,
84 src: "/images/pieces/" +
85 V.getPpath(this.vr.board[ci][cj]) + ".svg",
91 if (this.settings.hints && hintSquares[ci][cj])
101 src: "/images/mark.svg",
112 ['board'+sizeY]: true,
113 'light-square': (i+j)%2==0,
114 'dark-square': (i+j)%2==1,
115 [this.settings.bcolor]: true,
116 'in-shadow': this.vname=="Dark" && !this.analyze
118 || !this.vr.enlightened[this.userColor][ci][cj]),
119 'highlight': showLight && !!lm && lm.end.x == ci && lm.end.y == cj,
120 'incheck': showLight && incheckSq[ci][cj],
123 id: getSquareId({x:ci,y:cj}),
132 const playingColor = this.userColor || "w"; //default for an observer
133 let elementArray = [gameDiv];
134 if (this.choices.length > 0)
139 attrs: { "id": "choices" },
140 'class': { 'row': true },
142 "top": (offset[0] + (sizeY/2)*squareWidth-squareWidth/2) + "px",
143 "left": (offset[1] + squareWidth*(sizeY - this.choices.length)/2) + "px",
144 "width": (this.choices.length * squareWidth) + "px",
145 "height": squareWidth + "px",
148 this.choices.map(m => { //a "choice" is a move
153 ['board'+sizeY]: true,
156 'width': (100/this.choices.length) + "%",
157 'padding-bottom': (100/this.choices.length) + "%",
162 attrs: { "src": '/images/pieces/' +
163 V.getPpath(m.appear[0].c+m.appear[0].p) + '.svg' },
164 'class': { 'choice-piece': true },
166 "click": e => { this.play(m); this.choices=[]; },
173 elementArray.unshift(choices);
175 if (!!this.vr.reserve)
177 const shiftIdx = (playingColor=="w" ? 0 : 1);
178 let myReservePiecesArray = [];
179 for (let i=0; i<V.RESERVE_PIECES.length; i++)
181 myReservePiecesArray.push(h('div',
183 'class': {'board':true, ['board'+sizeY]:true},
184 attrs: { id: getSquareId({x:sizeX+shiftIdx,y:i}) }
189 'class': {"piece":true, "reserve":true},
191 "src": "/images/pieces/" +
192 this.vr.getReservePpath(playingColor,i) + ".svg",
196 {"class": { "reserve-count": true } },
197 [ this.vr.reserve[playingColor][V.RESERVE_PIECES[i]] ]
201 let oppReservePiecesArray = [];
202 const oppCol = V.GetOppCol(playingColor);
203 for (let i=0; i<V.RESERVE_PIECES.length; i++)
205 oppReservePiecesArray.push(h('div',
207 'class': {'board':true, ['board'+sizeY]:true},
208 attrs: { id: getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
213 'class': {"piece":true, "reserve":true},
215 "src": "/images/pieces/" +
216 this.vr.getReservePpath(oppCol,i) + ".svg",
220 {"class": { "reserve-count": true } },
221 [ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
225 let reserves = h('div',
237 "reserve-row-1": true,
243 { 'class': { 'row': true }},
244 oppReservePiecesArray
248 elementArray.push(reserves);
251 // NOTE: click = mousedown + mouseup
252 if ('ontouchstart' in window)
256 touchstart: this.mousedown,
257 touchmove: this.mousemove,
258 touchend: this.mouseup,
266 mousedown: this.mousedown,
267 mousemove: this.mousemove,
268 mouseup: this.mouseup,
279 mousedown: function(e) {
280 e = e || window.event;
283 while (!ingame && elem !== null)
285 if (elem.classList.contains("game"))
290 elem = elem.parentElement;
292 if (!ingame) //let default behavior (click on button...)
294 e.preventDefault(); //disable native drag & drop
295 if (!this.selectedPiece && e.target.classList.contains("piece"))
297 let parent = e.target.parentNode;
298 // Next few lines to center the piece on mouse cursor
299 let rect = parent.getBoundingClientRect();
301 x: rect.x + rect.width/2,
302 y: rect.y + rect.width/2,
305 this.selectedPiece = e.target.cloneNode();
306 let spStyle = this.selectedPiece.style
307 spStyle.position = "absolute";
309 spStyle.display = "inline-block";
310 spStyle.zIndex = 3000;
311 const startSquare = getSquareFromId(parent.id);
312 this.possibleMoves = [];
313 const color = (this.analyze ? this.vr.turn : this.userColor);
314 if (this.vr.canIplay(color,startSquare))
315 this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
316 // Next line add moving piece just after current image
317 // (required for Crazyhouse reserve)
318 parent.insertBefore(this.selectedPiece, e.target.nextSibling);
321 mousemove: function(e) {
322 if (!this.selectedPiece)
324 e = e || window.event;
325 // If there is an active element, move it around
326 if (!!this.selectedPiece)
328 const [offsetX,offsetY] = !!e.clientX
329 ? [e.clientX,e.clientY] //desktop browser
330 : [e.changedTouches[0].pageX, e.changedTouches[0].pageY]; //smartphone
331 this.selectedPiece.style.left = (offsetX-this.start.x) + "px";
332 this.selectedPiece.style.top = (offsetY-this.start.y) + "px";
335 mouseup: function(e) {
336 if (!this.selectedPiece)
338 e = e || window.event;
339 this.selectedPiece.style.zIndex = -3000; //HACK to find square from final coords
340 const [offsetX,offsetY] = !!e.clientX
341 ? [e.clientX,e.clientY]
342 : [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
343 let landing = document.elementFromPoint(offsetX, offsetY);
344 this.selectedPiece.style.zIndex = 3000;
345 // Next condition: classList.contains(piece) fails because of marks
346 while (landing.tagName == "IMG")
347 landing = landing.parentNode;
348 if (this.start.id == landing.id)
350 // A click: selectedPiece and possibleMoves are already filled
353 // OK: process move attempt, landing is a square node
354 let endSquare = getSquareFromId(landing.id);
355 let moves = this.findMatchingMoves(endSquare);
356 this.possibleMoves = [];
357 if (moves.length > 1)
358 this.choices = moves;
359 else if (moves.length==1)
361 // Else: impossible move
362 this.selectedPiece.parentNode.removeChild(this.selectedPiece);
363 delete this.selectedPiece;
364 this.selectedPiece = null;
366 findMatchingMoves: function(endSquare) {
367 // Run through moves list and return the matching set (if promotions...)
369 this.possibleMoves.forEach(function(m) {
370 if (endSquare[0] == m.end.x && endSquare[1] == m.end.y)
375 play: function(move) {
376 this.$emit('play-move', move);
382 <style lang="sass" scoped>
392 // NOTE: no variants with reserve of size != 8
405 background-color: rgba(0,0,0,0)
408 background-color: #e6ee9c
410 background-color: skyblue
422 background-color: #00cc66 !important
425 background-color: #cc3300 !important
427 .light-square.lichess
428 background-color: #f0d9b5;
430 background-color: #b58863;
432 .light-square.chesscom
433 background-color: #e5e5ca;
434 .dark-square.chesscom
435 background-color: #6f8f57;
437 .light-square.chesstempo
438 background-color: #fdfdfd;
439 .dark-square.chesstempo
440 background-color: #88a0a8;