[vchess.git] / public / javascripts / components / board.js

Vue.component('my-board', {
	// Last move cannot be guessed from here, and is required to highlight squares
	// vr: object to check moves, print board...
	props: ["vr","lastMove","mode","orientation","userColor","gameOver"],
	data: function () {
		return {
			hints: (!localStorage["hints"] ? true : localStorage["hints"] === "1"),
			bcolor: localStorage["bcolor"] || "lichess", //lichess, chesscom or chesstempo
			possibleMoves: [], //filled after each valid click/dragstart
			choices: [], //promotion pieces, or checkered captures... (as moves)
			selectedPiece: null, //moving piece (or clicked piece)
			incheck: [],
			start: {}, //pixels coordinates + id of starting square (click or drag)
		};
	},
	render(h) {
		const [sizeX,sizeY] = [V.size.x,V.size.y];
		// Precompute hints squares to facilitate rendering
		let hintSquares = doubleArray(sizeX, sizeY, false);
		this.possibleMoves.forEach(m => { hintSquares[m.end.x][m.end.y] = true; });
		// Also precompute in-check squares
		let incheckSq = doubleArray(sizeX, sizeY, false);
		this.incheck.forEach(sq => { incheckSq[sq[0]][sq[1]] = true; });
		const choices = h(
			'div',
			{
				attrs: { "id": "choices" },
				'class': { 'row': true },
				style: {
					"display": this.choices.length>0?"block":"none",
					"top": "-" + ((sizeY/2)*squareWidth+squareWidth/2) + "px",
					"width": (this.choices.length * squareWidth) + "px",
					"height": squareWidth + "px",
				},
			},
			this.choices.map(m => { //a "choice" is a move
				return h('div',
					{
						'class': {
							'board': true,
							['board'+sizeY]: true,
						},
						style: {
							'width': (100/this.choices.length) + "%",
							'padding-bottom': (100/this.choices.length) + "%",
						},
					},
					[h('img',
						{
							attrs: { "src": '/images/pieces/' +
								V.getPpath(m.appear[0].c+m.appear[0].p) + '.svg' },
							'class': { 'choice-piece': true },
							on: {
								"click": e => { this.play(m); this.choices=[]; },
								// NOTE: add 'touchstart' event to fix a problem on smartphones
								"touchstart": e => { this.play(m); this.choices=[]; },
							},
						})
					]
				);
			})
		);
		// Create board element (+ reserves if needed by variant or mode)
		const lm = this.lastMove;
		const showLight = this.hints && variant.name != "Dark";
		const gameDiv = h(
			'div',
			{
				'class': {
					'game': true,
					'clearer': true,
				},
			},
			[_.range(sizeX).map(i => {
				let ci = (this.orientation=='w' ? i : sizeX-i-1);
				return h(
					'div',
					{
						'class': {
							'row': true,
						},
						style: { 'opacity': this.choices.length>0?"0.5":"1" },
					},
					_.range(sizeY).map(j => {
						let cj = (this.orientation=='w' ? j : sizeY-j-1);
						let elems = [];
						if (this.vr.board[ci][cj] != V.EMPTY && (variant.name!="Dark"
							|| this.gameOver || this.vr.enlightened[this.userColor][ci][cj]))
						{
							elems.push(
								h(
									'img',
									{
										'class': {
											'piece': true,
											'ghost': !!this.selectedPiece
												&& this.selectedPiece.parentNode.id == "sq-"+ci+"-"+cj,
										},
										attrs: {
											src: "/images/pieces/" +
												V.getPpath(this.vr.board[ci][cj]) + ".svg",
										},
									}
								)
							);
						}
						if (this.hints && hintSquares[ci][cj])
						{
							elems.push(
								h(
									'img',
									{
										'class': {
											'mark-square': true,
										},
										attrs: {
											src: "/images/mark.svg",
										},
									}
								)
							);
						}
						return h(
							'div',
							{
								'class': {
									'board': true,
									['board'+sizeY]: true,
									'light-square': (i+j)%2==0,
									'dark-square': (i+j)%2==1,
									[this.bcolor]: true,
									'in-shadow': variant.name=="Dark" && !this.gameOver
										&& !this.vr.enlightened[this.userColor][ci][cj],
									'highlight': showLight && !!lm && _.isMatch(lm.end, {x:ci,y:cj}),
									'incheck': showLight && incheckSq[ci][cj],
								},
								attrs: {
									id: this.getSquareId({x:ci,y:cj}),
								},
							},
							elems
						);
					})
				);
			}), choices]
		);
		let elementArray = [choices, gameDiv];
		if (!!this.vr.reserve)
		{
			const shiftIdx = (this.userColor=="w" ? 0 : 1);
			let myReservePiecesArray = [];
			for (let i=0; i<V.RESERVE_PIECES.length; i++)
			{
				myReservePiecesArray.push(h('div',
				{
					'class': {'board':true, ['board'+sizeY]:true},
					attrs: { id: this.getSquareId({x:sizeX+shiftIdx,y:i}) }
				},
				[
					h('img',
					{
						'class': {"piece":true, "reserve":true},
						attrs: {
							"src": "/images/pieces/" +
								this.vr.getReservePpath(this.userColor,i) + ".svg",
						}
					}),
					h('sup',
						{"class": { "reserve-count": true } },
						[ this.vr.reserve[this.userColor][V.RESERVE_PIECES[i]] ]
					)
				]));
			}
			let oppReservePiecesArray = [];
			const oppCol = V.GetOppCol(this.userColor);
			for (let i=0; i<V.RESERVE_PIECES.length; i++)
			{
				oppReservePiecesArray.push(h('div',
				{
					'class': {'board':true, ['board'+sizeY]:true},
					attrs: { id: this.getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
				},
				[
					h('img',
					{
						'class': {"piece":true, "reserve":true},
						attrs: {
							"src": "/images/pieces/" +
								this.vr.getReservePpath(oppCol,i) + ".svg",
						}
					}),
					h('sup',
						{"class": { "reserve-count": true } },
						[ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
					)
				]));
			}
			let reserves = h('div',
				{
					'class':{
						'game': true,
						"reserve-div": true,
					},
				},
				[
					h('div',
						{
							'class': {
								'row': true,
								"reserve-row-1": true,
							},
						},
						myReservePiecesArray
					),
					h('div',
						{ 'class': { 'row': true }},
						oppReservePiecesArray
					)
				]
			);
			elementArray.push(reserves);
		}
		return h(
			'div',
			{
				'class': {
					"col-sm-12":true,
					"col-md-10":true,
					"col-md-offset-1":true,
					"col-lg-8":true,
					"col-lg-offset-2":true,
				},
				// NOTE: click = mousedown + mouseup
				on: {
					mousedown: this.mousedown,
					mousemove: this.mousemove,
					mouseup: this.mouseup,
					touchstart: this.mousedown,
					touchmove: this.mousemove,
					touchend: this.mouseup,
				},
			},
			elementArray
		);
	},
	methods: {
		// Get the identifier of a HTML square from its numeric coordinates o.x,o.y.
		getSquareId: function(o) {
			// NOTE: a separator is required to allow any size of board
			return  "sq-" + o.x + "-" + o.y;
		},
		// Inverse function
		getSquareFromId: function(id) {
			let idParts = id.split('-');
			return [parseInt(idParts[1]), parseInt(idParts[2])];
		},
		mousedown: function(e) {
			e = e || window.event;
			let ingame = false;
			let elem = e.target;
			while (!ingame && elem !== null)
			{
				if (elem.classList.contains("game"))
				{
					ingame = true;
					break;
				}
				elem = elem.parentElement;
			}
			if (!ingame) //let default behavior (click on button...)
				return;
			e.preventDefault(); //disable native drag & drop
			if (!this.selectedPiece && e.target.classList.contains("piece"))
			{
				// Next few lines to center the piece on mouse cursor
				let rect = e.target.parentNode.getBoundingClientRect();
				this.start = {
					x: rect.x + rect.width/2,
					y: rect.y + rect.width/2,
					id: e.target.parentNode.id
				};
				this.selectedPiece = e.target.cloneNode();
				this.selectedPiece.style.position = "absolute";
				this.selectedPiece.style.top = 0;
				this.selectedPiece.style.display = "inline-block";
				this.selectedPiece.style.zIndex = 3000;
				const startSquare = this.getSquareFromId(e.target.parentNode.id);
				this.possibleMoves = [];
				const color = this.mode=="analyze" || this.gameOver
					? this.vr.turn
					: this.userColor;
				if (this.vr.canIplay(color,startSquare))
					this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
				// Next line add moving piece just after current image
				// (required for Crazyhouse reserve)
				e.target.parentNode.insertBefore(this.selectedPiece, e.target.nextSibling);
			}
		},
		mousemove: function(e) {
			if (!this.selectedPiece)
				return;
			e = e || window.event;
			// If there is an active element, move it around
			if (!!this.selectedPiece)
			{
				const [offsetX,offsetY] = !!e.clientX
					? [e.clientX,e.clientY] //desktop browser
					: [e.changedTouches[0].pageX, e.changedTouches[0].pageY]; //smartphone
				this.selectedPiece.style.left = (offsetX-this.start.x) + "px";
				this.selectedPiece.style.top = (offsetY-this.start.y) + "px";
			}
		},
		mouseup: function(e) {
			if (!this.selectedPiece)
				return;
			e = e || window.event;
			// Read drop target (or parentElement, parentNode... if type == "img")
			this.selectedPiece.style.zIndex = -3000; //HACK to find square from final coords
			const [offsetX,offsetY] = !!e.clientX
				? [e.clientX,e.clientY]
				: [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
			let landing = document.elementFromPoint(offsetX, offsetY);
			this.selectedPiece.style.zIndex = 3000;
			// Next condition: classList.contains(piece) fails because of marks
			while (landing.tagName == "IMG")
				landing = landing.parentNode;
			if (this.start.id == landing.id)
			{
				// A click: selectedPiece and possibleMoves are already filled
				return;
			}
			// OK: process move attempt
			let endSquare = this.getSquareFromId(landing.id);
			let moves = this.findMatchingMoves(endSquare);
			this.possibleMoves = [];
			if (moves.length > 1)
				this.choices = moves;
			else if (moves.length==1)
				this.play(moves[0]);
			// Else: impossible move
			this.selectedPiece.parentNode.removeChild(this.selectedPiece);
			delete this.selectedPiece;
			this.selectedPiece = null;
		},
		findMatchingMoves: function(endSquare) {
			// Run through moves list and return the matching set (if promotions...)
			let moves = [];
			this.possibleMoves.forEach(function(m) {
				if (endSquare[0] == m.end.x && endSquare[1] == m.end.y)
					moves.push(m);
			});
			return moves;
		},
		play: function(move) {
			this.$emit('play-move', move);
		},
	},
})
Commit	Line	Data
e5dc87e0 BA	1	Vue.component('my-board', {
e5dc87e0 BA	2	// Last move cannot be guessed from here, and is required to highlight squares
fd373b27 BA	3	// vr: object to check moves, print board...
fd373b27 BA	4	props: ["vr","lastMove","mode","orientation","userColor","gameOver"],
e5dc87e0 BA	5	data: function () {
e5dc87e0 BA	6	return {
81da2786 BA	7	hints: (!localStorage["hints"] ? true : localStorage["hints"] === "1"),
	8	bcolor: localStorage["bcolor"] \|\| "lichess", //lichess, chesscom or chesstempo
	9	possibleMoves: [], //filled after each valid click/dragstart
	10	choices: [], //promotion pieces, or checkered captures... (as moves)
	11	selectedPiece: null, //moving piece (or clicked piece)
	12	incheck: [],
	13	start: {}, //pixels coordinates + id of starting square (click or drag)
e5dc87e0 BA	14	};
e5dc87e0 BA	15	},
e5dc87e0 BA	16	render(h) {
e5dc87e0 BA	17	const [sizeX,sizeY] = [V.size.x,V.size.y];
81da2786 BA	18	// Precompute hints squares to facilitate rendering
	19	let hintSquares = doubleArray(sizeX, sizeY, false);
	20	this.possibleMoves.forEach(m => { hintSquares[m.end.x][m.end.y] = true; });
	21	// Also precompute in-check squares
	22	let incheckSq = doubleArray(sizeX, sizeY, false);
	23	this.incheck.forEach(sq => { incheckSq[sq[0]][sq[1]] = true; });
e5dc87e0 BA	24	const choices = h(
	25	'div',
	26	{
	27	attrs: { "id": "choices" },
	28	'class': { 'row': true },
	29	style: {
	30	"display": this.choices.length>0?"block":"none",
	31	"top": "-" + ((sizeY/2)*squareWidth+squareWidth/2) + "px",
	32	"width": (this.choices.length * squareWidth) + "px",
	33	"height": squareWidth + "px",
81da2786	34	},
e5dc87e0 BA	35	},
	36	this.choices.map(m => { //a "choice" is a move
	37	return h('div',
	38	{
	39	'class': {
	40	'board': true,
	41	['board'+sizeY]: true,
	42	},
	43	style: {
	44	'width': (100/this.choices.length) + "%",
	45	'padding-bottom': (100/this.choices.length) + "%",
81da2786	46	},
81da2786	47	},
e5dc87e0	48	[h('img',
81da2786	49	{
e5dc87e0 BA	50	attrs: { "src": '/images/pieces/' +
	51	V.getPpath(m.appear[0].c+m.appear[0].p) + '.svg' },
	52	'class': { 'choice-piece': true },
	53	on: {
	54	"click": e => { this.play(m); this.choices=[]; },
	55	// NOTE: add 'touchstart' event to fix a problem on smartphones
	56	"touchstart": e => { this.play(m); this.choices=[]; },
81da2786	57	},
81da2786	58	})
e5dc87e0 BA	59	]
	60	);
	61	})
	62	);
	63	// Create board element (+ reserves if needed by variant or mode)
	64	const lm = this.lastMove;
	65	const showLight = this.hints && variant.name != "Dark";
	66	const gameDiv = h(
	67	'div',
81da2786	68	{
e5dc87e0 BA	69	'class': {
	70	'game': true,
	71	'clearer': true,
	72	},
	73	},
	74	[_.range(sizeX).map(i => {
	75	let ci = (this.orientation=='w' ? i : sizeX-i-1);
	76	return h(
	77	'div',
81da2786	78	{
e5dc87e0 BA	79	'class': {
	80	'row': true,
	81	},
	82	style: { 'opacity': this.choices.length>0?"0.5":"1" },
81da2786	83	},
e5dc87e0 BA	84	_.range(sizeY).map(j => {
	85	let cj = (this.orientation=='w' ? j : sizeY-j-1);
	86	let elems = [];
	87	if (this.vr.board[ci][cj] != V.EMPTY && (variant.name!="Dark"
	88	\|\| this.gameOver \|\| this.vr.enlightened[this.userColor][ci][cj]))
81da2786	89	{
e5dc87e0 BA	90	elems.push(
	91	h(
	92	'img',
	93	{
	94	'class': {
	95	'piece': true,
	96	'ghost': !!this.selectedPiece
	97	&& this.selectedPiece.parentNode.id == "sq-"+ci+"-"+cj,
	98	},
	99	attrs: {
	100	src: "/images/pieces/" +
	101	V.getPpath(this.vr.board[ci][cj]) + ".svg",
	102	},
	103	}
	104	)
	105	);
	106	}
	107	if (this.hints && hintSquares[ci][cj])
81da2786	108	{
e5dc87e0 BA	109	elems.push(
	110	h(
	111	'img',
	112	{
	113	'class': {
	114	'mark-square': true,
	115	},
	116	attrs: {
	117	src: "/images/mark.svg",
	118	},
	119	}
	120	)
	121	);
	122	}
	123	return h(
	124	'div',
81da2786 BA	125	{
81da2786 BA	126	'class': {
e5dc87e0 BA	127	'board': true,
	128	['board'+sizeY]: true,
	129	'light-square': (i+j)%2==0,
	130	'dark-square': (i+j)%2==1,
	131	[this.bcolor]: true,
	132	'in-shadow': variant.name=="Dark" && !this.gameOver
	133	&& !this.vr.enlightened[this.userColor][ci][cj],
	134	'highlight': showLight && !!lm && _.isMatch(lm.end, {x:ci,y:cj}),
	135	'incheck': showLight && incheckSq[ci][cj],
	136	},
	137	attrs: {
	138	id: this.getSquareId({x:ci,y:cj}),
81da2786 BA	139	},
81da2786 BA	140	},
e5dc87e0 BA	141	elems
	142	);
	143	})
81da2786	144	);
e5dc87e0 BA	145	}), choices]
	146	);
	147	let elementArray = [choices, gameDiv];
	148	if (!!this.vr.reserve)
	149	{
	150	const shiftIdx = (this.userColor=="w" ? 0 : 1);
	151	let myReservePiecesArray = [];
	152	for (let i=0; i<V.RESERVE_PIECES.length; i++)
	153	{
	154	myReservePiecesArray.push(h('div',
	155	{
	156	'class': {'board':true, ['board'+sizeY]:true},
	157	attrs: { id: this.getSquareId({x:sizeX+shiftIdx,y:i}) }
	158	},
	159	[
	160	h('img',
	161	{
	162	'class': {"piece":true, "reserve":true},
	163	attrs: {
	164	"src": "/images/pieces/" +
	165	this.vr.getReservePpath(this.userColor,i) + ".svg",
	166	}
	167	}),
	168	h('sup',
	169	{"class": { "reserve-count": true } },
	170	[ this.vr.reserve[this.userColor][V.RESERVE_PIECES[i]] ]
	171	)
	172	]));
	173	}
	174	let oppReservePiecesArray = [];
fd373b27	175	const oppCol = V.GetOppCol(this.userColor);
e5dc87e0 BA	176	for (let i=0; i<V.RESERVE_PIECES.length; i++)
	177	{
	178	oppReservePiecesArray.push(h('div',
	179	{
	180	'class': {'board':true, ['board'+sizeY]:true},
	181	attrs: { id: this.getSquareId({x:sizeX+(1-shiftIdx),y:i}) }
	182	},
	183	[
	184	h('img',
	185	{
	186	'class': {"piece":true, "reserve":true},
	187	attrs: {
	188	"src": "/images/pieces/" +
	189	this.vr.getReservePpath(oppCol,i) + ".svg",
	190	}
	191	}),
	192	h('sup',
	193	{"class": { "reserve-count": true } },
	194	[ this.vr.reserve[oppCol][V.RESERVE_PIECES[i]] ]
	195	)
	196	]));
81da2786	197	}
e5dc87e0 BA	198	let reserves = h('div',
	199	{
	200	'class':{
	201	'game': true,
	202	"reserve-div": true,
	203	},
	204	},
	205	[
81da2786 BA	206	h('div',
81da2786 BA	207	{
e5dc87e0 BA	208	'class': {
	209	'row': true,
	210	"reserve-row-1": true,
	211	},
81da2786	212	},
e5dc87e0 BA	213	myReservePiecesArray
	214	),
	215	h('div',
	216	{ 'class': { 'row': true }},
	217	oppReservePiecesArray
81da2786	218	)
e5dc87e0 BA	219	]
	220	);
	221	elementArray.push(reserves);
	222	}
	223	return h(
	224	'div',
	225	{
	226	'class': {
	227	"col-sm-12":true,
	228	"col-md-10":true,
	229	"col-md-offset-1":true,
	230	"col-lg-8":true,
	231	"col-lg-offset-2":true,
	232	},
	233	// NOTE: click = mousedown + mouseup
81da2786 BA	234	on: {
	235	mousedown: this.mousedown,
	236	mousemove: this.mousemove,
	237	mouseup: this.mouseup,
	238	touchstart: this.mousedown,
	239	touchmove: this.mousemove,
	240	touchend: this.mouseup,
	241	},
e5dc87e0 BA	242	},
	243	elementArray
	244	);
	245	},
	246	methods: {
	247	// Get the identifier of a HTML square from its numeric coordinates o.x,o.y.
81da2786 BA	248	getSquareId: function(o) {
	249	// NOTE: a separator is required to allow any size of board
	250	return "sq-" + o.x + "-" + o.y;
	251	},
	252	// Inverse function
	253	getSquareFromId: function(id) {
	254	let idParts = id.split('-');
	255	return [parseInt(idParts[1]), parseInt(idParts[2])];
	256	},
	257	mousedown: function(e) {
	258	e = e \|\| window.event;
	259	let ingame = false;
	260	let elem = e.target;
	261	while (!ingame && elem !== null)
	262	{
	263	if (elem.classList.contains("game"))
	264	{
	265	ingame = true;
	266	break;
	267	}
	268	elem = elem.parentElement;
	269	}
	270	if (!ingame) //let default behavior (click on button...)
	271	return;
	272	e.preventDefault(); //disable native drag & drop
	273	if (!this.selectedPiece && e.target.classList.contains("piece"))
	274	{
	275	// Next few lines to center the piece on mouse cursor
	276	let rect = e.target.parentNode.getBoundingClientRect();
	277	this.start = {
	278	x: rect.x + rect.width/2,
	279	y: rect.y + rect.width/2,
	280	id: e.target.parentNode.id
	281	};
	282	this.selectedPiece = e.target.cloneNode();
	283	this.selectedPiece.style.position = "absolute";
	284	this.selectedPiece.style.top = 0;
	285	this.selectedPiece.style.display = "inline-block";
	286	this.selectedPiece.style.zIndex = 3000;
	287	const startSquare = this.getSquareFromId(e.target.parentNode.id);
	288	this.possibleMoves = [];
fd373b27	289	const color = this.mode=="analyze" \|\| this.gameOver
e5dc87e0 BA	290	? this.vr.turn
	291	: this.userColor;
	292	if (this.vr.canIplay(color,startSquare))
	293	this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
81da2786 BA	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 = this.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	},
fd373b27 BA	354	play: function(move) {
fd373b27 BA	355	this.$emit('play-move', move);
e5dc87e0 BA	356	},
	357	},
	358	})