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9b760538 BA |
1 | import {Random} from "/utils/alea.js"; |
2 | import {ArrayFun} from "/utils/array.js"; | |
41534b92 BA |
3 | import PiPo from "/utils/PiPo.js"; |
4 | import Move from "/utils/Move.js"; | |
5 | ||
5f08c59b BA |
6 | // Helper class for move animation |
7 | class TargetObj { | |
8 | ||
9 | constructor(callOnComplete) { | |
10 | this.value = 0; | |
11 | this.target = 0; | |
12 | this.callOnComplete = callOnComplete; | |
13 | } | |
14 | increment() { | |
15 | if (++this.value == this.target) | |
16 | this.callOnComplete(); | |
17 | } | |
18 | ||
19 | }; | |
20 | ||
41534b92 | 21 | // NOTE: x coords: top to bottom (white perspective); y: left to right |
cc2c7183 | 22 | // NOTE: ChessRules is aliased as window.C, and variants as window.V |
41534b92 BA |
23 | export default class ChessRules { |
24 | ||
e5f93427 | 25 | static get Aliases() { |
3caec36f | 26 | return {'C': ChessRules}; |
e5f93427 BA |
27 | } |
28 | ||
41534b92 BA |
29 | ///////////////////////// |
30 | // VARIANT SPECIFICATIONS | |
31 | ||
32 | // Some variants have specific options, like the number of pawns in Monster, | |
33 | // or the board size for Pandemonium. | |
34 | // Users can generally select a randomness level from 0 to 2. | |
35 | static get Options() { | |
36 | return { | |
41534b92 BA |
37 | select: [{ |
38 | label: "Randomness", | |
39 | variable: "randomness", | |
40 | defaut: 0, | |
41 | options: [ | |
b4ae3ff6 BA |
42 | {label: "Deterministic", value: 0}, |
43 | {label: "Symmetric random", value: 1}, | |
44 | {label: "Asymmetric random", value: 2} | |
41534b92 BA |
45 | ] |
46 | }], | |
437dfd42 | 47 | input: [ |
f8b43ef7 BA |
48 | { |
49 | label: "Capture king", | |
437dfd42 BA |
50 | variable: "taking", |
51 | type: "checkbox", | |
52 | defaut: false | |
f8b43ef7 BA |
53 | }, |
54 | { | |
55 | label: "Falling pawn", | |
437dfd42 BA |
56 | variable: "pawnfall", |
57 | type: "checkbox", | |
58 | defaut: false | |
f8b43ef7 BA |
59 | } |
60 | ], | |
41534b92 BA |
61 | // Game modifiers (using "elementary variants"). Default: false |
62 | styles: [ | |
63 | "atomic", | |
64 | "balance", //takes precedence over doublemove & progressive | |
65 | "cannibal", | |
66 | "capture", | |
67 | "crazyhouse", | |
68 | "cylinder", //ok with all | |
69 | "dark", | |
70 | "doublemove", | |
71 | "madrasi", | |
72 | "progressive", //(natural) priority over doublemove | |
73 | "recycle", | |
74 | "rifle", | |
75 | "teleport", | |
76 | "zen" | |
77 | ] | |
78 | }; | |
79 | } | |
80 | ||
c9ab0340 BA |
81 | get pawnPromotions() { |
82 | return ['q', 'r', 'n', 'b']; | |
41534b92 BA |
83 | } |
84 | ||
85 | // Some variants don't have flags: | |
86 | get hasFlags() { | |
87 | return true; | |
88 | } | |
89 | // Or castle | |
90 | get hasCastle() { | |
91 | return this.hasFlags; | |
92 | } | |
93 | ||
94 | // En-passant captures allowed? | |
95 | get hasEnpassant() { | |
96 | return true; | |
97 | } | |
98 | ||
99 | get hasReserve() { | |
100 | return ( | |
101 | !!this.options["crazyhouse"] || | |
102 | (!!this.options["recycle"] && !this.options["teleport"]) | |
103 | ); | |
104 | } | |
24872b22 BA |
105 | // Some variants do not store reserve state (Align4, Chakart...) |
106 | get hasReserveFen() { | |
107 | return this.hasReserve; | |
108 | } | |
41534b92 BA |
109 | |
110 | get noAnimate() { | |
111 | return !!this.options["dark"]; | |
112 | } | |
113 | ||
6b9320bb BA |
114 | // Some variants use only click information |
115 | get clickOnly() { | |
116 | return false; | |
117 | } | |
118 | ||
98d14451 | 119 | // Some variants reveal moves only after both players played |
126ffc70 | 120 | get hideMoves() { |
98d14451 BA |
121 | return false; |
122 | } | |
123 | ||
41534b92 | 124 | // Some variants use click infos: |
15106e82 BA |
125 | doClick(coords) { |
126 | if (typeof coords.x != "number") | |
b4ae3ff6 | 127 | return null; //click on reserves |
41534b92 | 128 | if ( |
cc2c7183 | 129 | this.options["teleport"] && this.subTurnTeleport == 2 && |
15106e82 | 130 | this.board[coords.x][coords.y] == "" |
41534b92 | 131 | ) { |
1a7c0492 | 132 | let res = new Move({ |
41534b92 BA |
133 | start: {x: this.captured.x, y: this.captured.y}, |
134 | appear: [ | |
135 | new PiPo({ | |
15106e82 BA |
136 | x: coords.x, |
137 | y: coords.y, | |
ca8a3993 | 138 | c: this.captured.c, |
41534b92 BA |
139 | p: this.captured.p |
140 | }) | |
141 | ], | |
1a7c0492 | 142 | vanish: [] |
41534b92 | 143 | }); |
1a7c0492 BA |
144 | res.drag = {c: this.captured.c, p: this.captured.p}; |
145 | return res; | |
41534b92 BA |
146 | } |
147 | return null; | |
148 | } | |
149 | ||
150 | //////////////////// | |
151 | // COORDINATES UTILS | |
152 | ||
4bff03f5 | 153 | // 3a --> {x:3, y:10} |
41534b92 | 154 | static SquareToCoords(sq) { |
15106e82 BA |
155 | return ArrayFun.toObject(["x", "y"], |
156 | [0, 1].map(i => parseInt(sq[i], 36))); | |
41534b92 BA |
157 | } |
158 | ||
4bff03f5 | 159 | // {x:11, y:12} --> bc |
15106e82 BA |
160 | static CoordsToSquare(cd) { |
161 | return Object.values(cd).map(c => c.toString(36)).join(""); | |
41534b92 BA |
162 | } |
163 | ||
15106e82 BA |
164 | coordsToId(cd) { |
165 | if (typeof cd.x == "number") { | |
166 | return ( | |
167 | `${this.containerId}|sq-${cd.x.toString(36)}-${cd.y.toString(36)}` | |
168 | ); | |
169 | } | |
41534b92 | 170 | // Reserve : |
15106e82 | 171 | return `${this.containerId}|rsq-${cd.x}-${cd.y}`; |
41534b92 BA |
172 | } |
173 | ||
174 | idToCoords(targetId) { | |
b4ae3ff6 BA |
175 | if (!targetId) |
176 | return null; //outside page, maybe... | |
41534b92 BA |
177 | const idParts = targetId.split('|'); //prefix|sq-2-3 (start at 0 => 3,4) |
178 | if ( | |
179 | idParts.length < 2 || | |
180 | idParts[0] != this.containerId || | |
181 | !idParts[1].match(/sq-[0-9a-zA-Z]-[0-9a-zA-Z]/) | |
182 | ) { | |
183 | return null; | |
184 | } | |
185 | const squares = idParts[1].split('-'); | |
186 | if (squares[0] == "sq") | |
15106e82 BA |
187 | return {x: parseInt(squares[1], 36), y: parseInt(squares[2], 36)}; |
188 | // squares[0] == "rsq" : reserve, 'c' + 'p' (letters color & piece) | |
189 | return {x: squares[1], y: squares[2]}; | |
41534b92 BA |
190 | } |
191 | ||
192 | ///////////// | |
193 | // FEN UTILS | |
194 | ||
195 | // Turn "wb" into "B" (for FEN) | |
196 | board2fen(b) { | |
4bff03f5 | 197 | return (b[0] == "w" ? b[1].toUpperCase() : b[1]); |
41534b92 BA |
198 | } |
199 | ||
200 | // Turn "p" into "bp" (for board) | |
201 | fen2board(f) { | |
4bff03f5 | 202 | return (f.charCodeAt(0) <= 90 ? "w" + f.toLowerCase() : "b" + f); |
41534b92 BA |
203 | } |
204 | ||
41534b92 | 205 | genRandInitFen(seed) { |
f31de5e4 BA |
206 | Random.setSeed(seed); //may be unused |
207 | let baseFen = this.genRandInitBaseFen(); | |
208 | baseFen.o = Object.assign({init: true}, baseFen.o); | |
209 | const parts = this.getPartFen(baseFen.o); | |
210 | return ( | |
dc10e429 | 211 | baseFen.fen + " w 0" + |
f31de5e4 BA |
212 | (Object.keys(parts).length > 0 ? (" " + JSON.stringify(parts)) : "") |
213 | ); | |
214 | } | |
215 | ||
216 | // Setup the initial random-or-not (asymmetric-or-not) position | |
217 | genRandInitBaseFen() { | |
41534b92 | 218 | let fen, flags = "0707"; |
cc2c7183 | 219 | if (!this.options.randomness) |
41534b92 | 220 | // Deterministic: |
dc10e429 | 221 | fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR"; |
41534b92 BA |
222 | |
223 | else { | |
224 | // Randomize | |
f382c57b | 225 | let pieces = {w: new Array(8), b: new Array(8)}; |
41534b92 BA |
226 | flags = ""; |
227 | // Shuffle pieces on first (and last rank if randomness == 2) | |
228 | for (let c of ["w", "b"]) { | |
229 | if (c == 'b' && this.options.randomness == 1) { | |
230 | pieces['b'] = pieces['w']; | |
231 | flags += flags; | |
232 | break; | |
233 | } | |
41534b92 | 234 | let positions = ArrayFun.range(8); |
41534b92 BA |
235 | // Get random squares for bishops |
236 | let randIndex = 2 * Random.randInt(4); | |
237 | const bishop1Pos = positions[randIndex]; | |
238 | // The second bishop must be on a square of different color | |
239 | let randIndex_tmp = 2 * Random.randInt(4) + 1; | |
240 | const bishop2Pos = positions[randIndex_tmp]; | |
241 | // Remove chosen squares | |
242 | positions.splice(Math.max(randIndex, randIndex_tmp), 1); | |
243 | positions.splice(Math.min(randIndex, randIndex_tmp), 1); | |
41534b92 BA |
244 | // Get random squares for knights |
245 | randIndex = Random.randInt(6); | |
246 | const knight1Pos = positions[randIndex]; | |
247 | positions.splice(randIndex, 1); | |
248 | randIndex = Random.randInt(5); | |
249 | const knight2Pos = positions[randIndex]; | |
250 | positions.splice(randIndex, 1); | |
41534b92 BA |
251 | // Get random square for queen |
252 | randIndex = Random.randInt(4); | |
253 | const queenPos = positions[randIndex]; | |
254 | positions.splice(randIndex, 1); | |
41534b92 BA |
255 | // Rooks and king positions are now fixed, |
256 | // because of the ordering rook-king-rook | |
257 | const rook1Pos = positions[0]; | |
258 | const kingPos = positions[1]; | |
259 | const rook2Pos = positions[2]; | |
41534b92 BA |
260 | // Finally put the shuffled pieces in the board array |
261 | pieces[c][rook1Pos] = "r"; | |
262 | pieces[c][knight1Pos] = "n"; | |
263 | pieces[c][bishop1Pos] = "b"; | |
264 | pieces[c][queenPos] = "q"; | |
265 | pieces[c][kingPos] = "k"; | |
266 | pieces[c][bishop2Pos] = "b"; | |
267 | pieces[c][knight2Pos] = "n"; | |
268 | pieces[c][rook2Pos] = "r"; | |
269 | flags += rook1Pos.toString() + rook2Pos.toString(); | |
270 | } | |
271 | fen = ( | |
272 | pieces["b"].join("") + | |
273 | "/pppppppp/8/8/8/8/PPPPPPPP/" + | |
dc10e429 | 274 | pieces["w"].join("").toUpperCase() |
41534b92 BA |
275 | ); |
276 | } | |
f31de5e4 | 277 | return { fen: fen, o: {flags: flags} }; |
41534b92 BA |
278 | } |
279 | ||
280 | // "Parse" FEN: just return untransformed string data | |
281 | parseFen(fen) { | |
282 | const fenParts = fen.split(" "); | |
283 | let res = { | |
284 | position: fenParts[0], | |
285 | turn: fenParts[1], | |
286 | movesCount: fenParts[2] | |
287 | }; | |
b4ae3ff6 BA |
288 | if (fenParts.length > 3) |
289 | res = Object.assign(res, JSON.parse(fenParts[3])); | |
41534b92 BA |
290 | return res; |
291 | } | |
292 | ||
293 | // Return current fen (game state) | |
294 | getFen() { | |
f31de5e4 BA |
295 | const parts = this.getPartFen({}); |
296 | return ( | |
297 | this.getBaseFen() + | |
298 | (Object.keys(parts).length > 0 ? (" " + JSON.stringify(parts)) : "") | |
41534b92 | 299 | ); |
f31de5e4 BA |
300 | } |
301 | ||
302 | getBaseFen() { | |
303 | return this.getPosition() + " " + this.turn + " " + this.movesCount; | |
304 | } | |
305 | ||
306 | getPartFen(o) { | |
307 | let parts = {}; | |
b4ae3ff6 | 308 | if (this.hasFlags) |
f31de5e4 | 309 | parts["flags"] = o.init ? o.flags : this.getFlagsFen(); |
41534b92 | 310 | if (this.hasEnpassant) |
f31de5e4 | 311 | parts["enpassant"] = o.init ? "-" : this.getEnpassantFen(); |
24872b22 | 312 | if (this.hasReserveFen) |
f31de5e4 | 313 | parts["reserve"] = this.getReserveFen(o); |
41534b92 | 314 | if (this.options["crazyhouse"]) |
f31de5e4 BA |
315 | parts["ispawn"] = this.getIspawnFen(o); |
316 | return parts; | |
41534b92 BA |
317 | } |
318 | ||
d621e620 BA |
319 | static FenEmptySquares(count) { |
320 | // if more than 9 consecutive free spaces, break the integer, | |
321 | // otherwise FEN parsing will fail. | |
322 | if (count <= 9) | |
323 | return count; | |
324 | // Most boards of size < 18: | |
325 | if (count <= 18) | |
326 | return "9" + (count - 9); | |
327 | // Except Gomoku: | |
328 | return "99" + (count - 18); | |
329 | } | |
330 | ||
41534b92 | 331 | // Position part of the FEN string |
15106e82 | 332 | getPosition() { |
41534b92 BA |
333 | let position = ""; |
334 | for (let i = 0; i < this.size.y; i++) { | |
335 | let emptyCount = 0; | |
336 | for (let j = 0; j < this.size.x; j++) { | |
b4ae3ff6 BA |
337 | if (this.board[i][j] == "") |
338 | emptyCount++; | |
41534b92 BA |
339 | else { |
340 | if (emptyCount > 0) { | |
341 | // Add empty squares in-between | |
d621e620 | 342 | position += C.FenEmptySquares(emptyCount); |
41534b92 BA |
343 | emptyCount = 0; |
344 | } | |
345 | position += this.board2fen(this.board[i][j]); | |
346 | } | |
347 | } | |
348 | if (emptyCount > 0) | |
349 | // "Flush remainder" | |
d621e620 | 350 | position += C.FenEmptySquares(emptyCount); |
b4ae3ff6 BA |
351 | if (i < this.size.y - 1) |
352 | position += "/"; //separate rows | |
41534b92 BA |
353 | } |
354 | return position; | |
355 | } | |
356 | ||
41534b92 BA |
357 | // Flags part of the FEN string |
358 | getFlagsFen() { | |
359 | return ["w", "b"].map(c => { | |
15106e82 | 360 | return this.castleFlags[c].map(x => x.toString(36)).join(""); |
41534b92 BA |
361 | }).join(""); |
362 | } | |
363 | ||
364 | // Enpassant part of the FEN string | |
365 | getEnpassantFen() { | |
b4ae3ff6 | 366 | if (!this.epSquare) |
f31de5e4 | 367 | return "-"; |
cc2c7183 | 368 | return C.CoordsToSquare(this.epSquare); |
41534b92 BA |
369 | } |
370 | ||
f31de5e4 BA |
371 | getReserveFen(o) { |
372 | if (o.init) | |
373 | return "000000000000"; | |
41534b92 BA |
374 | return ( |
375 | ["w","b"].map(c => Object.values(this.reserve[c]).join("")).join("") | |
376 | ); | |
377 | } | |
378 | ||
f31de5e4 BA |
379 | getIspawnFen(o) { |
380 | if (o.init) | |
381 | // NOTE: cannot merge because this.ispawn doesn't exist yet | |
382 | return "-"; | |
15106e82 BA |
383 | const squares = Object.keys(this.ispawn); |
384 | if (squares.length == 0) | |
b4ae3ff6 | 385 | return "-"; |
15106e82 | 386 | return squares.join(","); |
41534b92 BA |
387 | } |
388 | ||
389 | // Set flags from fen (castle: white a,h then black a,h) | |
390 | setFlags(fenflags) { | |
391 | this.castleFlags = { | |
15106e82 BA |
392 | w: [0, 1].map(i => parseInt(fenflags.charAt(i), 36)), |
393 | b: [2, 3].map(i => parseInt(fenflags.charAt(i), 36)) | |
41534b92 BA |
394 | }; |
395 | } | |
396 | ||
397 | ////////////////// | |
398 | // INITIALIZATION | |
399 | ||
bc2bc396 | 400 | constructor(o) { |
41534b92 | 401 | this.options = o.options; |
535c464b BA |
402 | // Fill missing options (always the case if random challenge) |
403 | (V.Options.select || []).concat(V.Options.input || []).forEach(opt => { | |
404 | if (this.options[opt.variable] === undefined) | |
405 | this.options[opt.variable] = opt.defaut; | |
406 | }); | |
bc2bc396 | 407 | if (o.genFenOnly) |
f382c57b BA |
408 | // This object will be used only for initial FEN generation |
409 | return; | |
f31de5e4 BA |
410 | |
411 | // Some variables | |
41534b92 | 412 | this.playerColor = o.color; |
15106e82 | 413 | this.afterPlay = o.afterPlay; //trigger some actions after playing a move |
f31de5e4 BA |
414 | this.containerId = o.element; |
415 | this.isDiagram = o.diagram; | |
416 | this.marks = o.marks; | |
41534b92 | 417 | |
f31de5e4 | 418 | // Initializations |
b4ae3ff6 BA |
419 | if (!o.fen) |
420 | o.fen = this.genRandInitFen(o.seed); | |
5f08c59b | 421 | this.re_initFromFen(o.fen); |
41534b92 BA |
422 | this.graphicalInit(); |
423 | } | |
424 | ||
5f08c59b BA |
425 | re_initFromFen(fen, oldBoard) { |
426 | const fenParsed = this.parseFen(fen); | |
427 | this.board = oldBoard || this.getBoard(fenParsed.position); | |
428 | this.turn = fenParsed.turn; | |
429 | this.movesCount = parseInt(fenParsed.movesCount, 10); | |
430 | this.setOtherVariables(fenParsed); | |
431 | } | |
432 | ||
41534b92 BA |
433 | // Turn position fen into double array ["wb","wp","bk",...] |
434 | getBoard(position) { | |
435 | const rows = position.split("/"); | |
436 | let board = ArrayFun.init(this.size.x, this.size.y, ""); | |
437 | for (let i = 0; i < rows.length; i++) { | |
438 | let j = 0; | |
439 | for (let indexInRow = 0; indexInRow < rows[i].length; indexInRow++) { | |
440 | const character = rows[i][indexInRow]; | |
441 | const num = parseInt(character, 10); | |
442 | // If num is a number, just shift j: | |
b4ae3ff6 BA |
443 | if (!isNaN(num)) |
444 | j += num; | |
41534b92 | 445 | // Else: something at position i,j |
b4ae3ff6 BA |
446 | else |
447 | board[i][j++] = this.fen2board(character); | |
41534b92 BA |
448 | } |
449 | } | |
450 | return board; | |
451 | } | |
452 | ||
453 | // Some additional variables from FEN (variant dependant) | |
454 | setOtherVariables(fenParsed) { | |
455 | // Set flags and enpassant: | |
b4ae3ff6 BA |
456 | if (this.hasFlags) |
457 | this.setFlags(fenParsed.flags); | |
41534b92 BA |
458 | if (this.hasEnpassant) |
459 | this.epSquare = this.getEpSquare(fenParsed.enpassant); | |
549ca151 | 460 | if (this.hasReserve && !this.isDiagram) |
b4ae3ff6 BA |
461 | this.initReserves(fenParsed.reserve); |
462 | if (this.options["crazyhouse"]) | |
463 | this.initIspawn(fenParsed.ispawn); | |
cc2c7183 BA |
464 | if (this.options["teleport"]) { |
465 | this.subTurnTeleport = 1; | |
466 | this.captured = null; | |
467 | } | |
41534b92 | 468 | if (this.options["dark"]) { |
41534b92 | 469 | // Setup enlightened: squares reachable by player side |
c9ab0340 BA |
470 | this.enlightened = ArrayFun.init(this.size.x, this.size.y, false); |
471 | this.updateEnlightened(); | |
41534b92 | 472 | } |
5f08c59b BA |
473 | this.subTurn = 1; //may be unused |
474 | if (!this.moveStack) //avoid resetting (unwanted) | |
475 | this.moveStack = []; | |
41534b92 BA |
476 | } |
477 | ||
ca8a3993 | 478 | // ordering as in pieces() p,r,n,b,q,k |
dc10e429 BA |
479 | initReserves(reserveStr, pieceArray) { |
480 | if (!pieceArray) | |
481 | pieceArray = ['p', 'r', 'n', 'b', 'q', 'k']; | |
ca8a3993 | 482 | const counts = reserveStr.split("").map(c => parseInt(c, 36)); |
dc10e429 BA |
483 | const L = pieceArray.length; |
484 | this.reserve = { | |
485 | w: ArrayFun.toObject(pieceArray, counts.slice(0, L)), | |
486 | b: ArrayFun.toObject(pieceArray, counts.slice(L, 2 * L)) | |
487 | }; | |
41534b92 BA |
488 | } |
489 | ||
490 | initIspawn(ispawnStr) { | |
15106e82 BA |
491 | if (ispawnStr != "-") |
492 | this.ispawn = ArrayFun.toObject(ispawnStr.split(","), true); | |
b4ae3ff6 BA |
493 | else |
494 | this.ispawn = {}; | |
41534b92 BA |
495 | } |
496 | ||
ca8a3993 BA |
497 | //////////////// |
498 | // VISUAL UTILS | |
499 | ||
500 | getPieceWidth(rwidth) { | |
501 | return (rwidth / this.size.y); | |
502 | } | |
503 | ||
504 | getReserveSquareSize(rwidth, nbR) { | |
505 | const sqSize = this.getPieceWidth(rwidth); | |
506 | return Math.min(sqSize, rwidth / nbR); | |
507 | } | |
508 | ||
509 | getReserveNumId(color, piece) { | |
510 | return `${this.containerId}|rnum-${color}${piece}`; | |
511 | } | |
512 | ||
41534b92 BA |
513 | getNbReservePieces(color) { |
514 | return ( | |
515 | Object.values(this.reserve[color]).reduce( | |
516 | (oldV,newV) => oldV + (newV > 0 ? 1 : 0), 0) | |
517 | ); | |
518 | } | |
519 | ||
15106e82 BA |
520 | getRankInReserve(c, p) { |
521 | const pieces = Object.keys(this.pieces()); | |
522 | const lastIndex = pieces.findIndex(pp => pp == p) | |
523 | let toTest = pieces.slice(0, lastIndex); | |
524 | return toTest.reduce( | |
525 | (oldV,newV) => oldV + (this.reserve[c][newV] > 0 ? 1 : 0), 0); | |
526 | } | |
527 | ||
9b760538 | 528 | static AddClass_es(elt, class_es) { |
3b641716 BA |
529 | if (!Array.isArray(class_es)) |
530 | class_es = [class_es]; | |
9b760538 | 531 | class_es.forEach(cl => elt.classList.add(cl)); |
3b641716 BA |
532 | } |
533 | ||
9b760538 | 534 | static RemoveClass_es(elt, class_es) { |
3b641716 BA |
535 | if (!Array.isArray(class_es)) |
536 | class_es = [class_es]; | |
9b760538 | 537 | class_es.forEach(cl => elt.classList.remove(cl)); |
3b641716 BA |
538 | } |
539 | ||
ca8a3993 BA |
540 | // Generally light square bottom-right |
541 | getSquareColorClass(x, y) { | |
542 | return ((x+y) % 2 == 0 ? "light-square": "dark-square"); | |
543 | } | |
544 | ||
545 | getMaxDistance(r) { | |
546 | // Works for all rectangular boards: | |
547 | return Math.sqrt(r.width ** 2 + r.height ** 2); | |
548 | } | |
549 | ||
550 | getDomPiece(x, y) { | |
551 | return (typeof x == "string" ? this.r_pieces : this.g_pieces)[x][y]; | |
552 | } | |
553 | ||
554 | ////////////////// | |
555 | // VISUAL METHODS | |
556 | ||
41534b92 | 557 | graphicalInit() { |
65c770d1 BA |
558 | const g_init = () => { |
559 | this.re_drawBoardElements(); | |
549ca151 | 560 | if (!this.isDiagram && !this.mouseListeners && !this.touchListeners) |
5abaabb3 | 561 | this.initMouseEvents(); |
65c770d1 BA |
562 | }; |
563 | let container = document.getElementById(this.containerId); | |
549ca151 BA |
564 | this.windowResizeObs = new ResizeObserver(g_init); |
565 | this.windowResizeObs.observe(container); | |
41534b92 BA |
566 | } |
567 | ||
568 | re_drawBoardElements() { | |
569 | const board = this.getSvgChessboard(); | |
cc2c7183 | 570 | const oppCol = C.GetOppCol(this.playerColor); |
e7b64798 BA |
571 | const container = document.getElementById(this.containerId); |
572 | const rc = container.getBoundingClientRect(); | |
573 | let chessboard = container.querySelector(".chessboard"); | |
3c61449b BA |
574 | chessboard.innerHTML = ""; |
575 | chessboard.insertAdjacentHTML('beforeend', board); | |
41534b92 | 576 | // Compare window ratio width / height to aspectRatio: |
e7b64798 | 577 | const windowRatio = rc.width / rc.height; |
41534b92 | 578 | let cbWidth, cbHeight; |
f55a0a67 BA |
579 | const vRatio = this.size.ratio || 1; |
580 | if (windowRatio <= vRatio) { | |
41534b92 | 581 | // Limiting dimension is width: |
e7b64798 | 582 | cbWidth = Math.min(rc.width, 767); |
f55a0a67 | 583 | cbHeight = cbWidth / vRatio; |
41534b92 BA |
584 | } |
585 | else { | |
586 | // Limiting dimension is height: | |
e7b64798 | 587 | cbHeight = Math.min(rc.height, 767); |
f55a0a67 | 588 | cbWidth = cbHeight * vRatio; |
41534b92 | 589 | } |
549ca151 | 590 | if (this.hasReserve && !this.isDiagram) { |
41534b92 BA |
591 | const sqSize = cbWidth / this.size.y; |
592 | // NOTE: allocate space for reserves (up/down) even if they are empty | |
15106e82 | 593 | // Cannot use getReserveSquareSize() here, but sqSize is an upper bound. |
e7b64798 BA |
594 | if ((rc.height - cbHeight) / 2 < sqSize + 5) { |
595 | cbHeight = rc.height - 2 * (sqSize + 5); | |
f55a0a67 | 596 | cbWidth = cbHeight * vRatio; |
41534b92 BA |
597 | } |
598 | } | |
3c61449b BA |
599 | chessboard.style.width = cbWidth + "px"; |
600 | chessboard.style.height = cbHeight + "px"; | |
41534b92 | 601 | // Center chessboard: |
e7b64798 BA |
602 | const spaceLeft = (rc.width - cbWidth) / 2, |
603 | spaceTop = (rc.height - cbHeight) / 2; | |
3c61449b BA |
604 | chessboard.style.left = spaceLeft + "px"; |
605 | chessboard.style.top = spaceTop + "px"; | |
41534b92 BA |
606 | // Give sizes instead of recomputing them, |
607 | // because chessboard might not be drawn yet. | |
608 | this.setupPieces({ | |
609 | width: cbWidth, | |
610 | height: cbHeight, | |
611 | x: spaceLeft, | |
612 | y: spaceTop | |
613 | }); | |
614 | } | |
615 | ||
616 | // Get SVG board (background, no pieces) | |
617 | getSvgChessboard() { | |
41534b92 BA |
618 | const flipped = (this.playerColor == 'b'); |
619 | let board = ` | |
620 | <svg | |
f55a0a67 | 621 | viewBox="0 0 ${10*this.size.y} ${10*this.size.x}" |
535c464b | 622 | class="chessboard_SVG">`; |
728cb1e3 BA |
623 | for (let i=0; i < this.size.x; i++) { |
624 | for (let j=0; j < this.size.y; j++) { | |
9b760538 BA |
625 | if (!this.onBoard(i, j)) |
626 | continue; | |
41534b92 BA |
627 | const ii = (flipped ? this.size.x - 1 - i : i); |
628 | const jj = (flipped ? this.size.y - 1 - j : j); | |
c7bf7b1b BA |
629 | let classes = this.getSquareColorClass(ii, jj); |
630 | if (this.enlightened && !this.enlightened[ii][jj]) | |
631 | classes += " in-shadow"; | |
41534b92 | 632 | // NOTE: x / y reversed because coordinates system is reversed. |
535c464b BA |
633 | board += ` |
634 | <rect | |
635 | class="${classes}" | |
636 | id="${this.coordsToId({x: ii, y: jj})}" | |
637 | width="10" | |
638 | height="10" | |
639 | x="${10*j}" | |
640 | y="${10*i}" | |
641 | />`; | |
41534b92 BA |
642 | } |
643 | } | |
535c464b | 644 | board += "</svg>"; |
41534b92 BA |
645 | return board; |
646 | } | |
647 | ||
41534b92 | 648 | setupPieces(r) { |
3c61449b BA |
649 | let chessboard = |
650 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
b4ae3ff6 BA |
651 | if (!r) |
652 | r = chessboard.getBoundingClientRect(); | |
41534b92 | 653 | const pieceWidth = this.getPieceWidth(r.width); |
b2fc1259 BA |
654 | const addPiece = (i, j, arrName, classes) => { |
655 | this[arrName][i][j] = document.createElement("piece"); | |
656 | C.AddClass_es(this[arrName][i][j], classes); | |
657 | this[arrName][i][j].style.width = pieceWidth + "px"; | |
658 | this[arrName][i][j].style.height = pieceWidth + "px"; | |
659 | let [ip, jp] = this.getPixelPosition(i, j, r); | |
660 | // Translate coordinates to use chessboard as reference: | |
661 | this[arrName][i][j].style.transform = | |
662 | `translate(${ip - r.x}px,${jp - r.y}px)`; | |
663 | chessboard.appendChild(this[arrName][i][j]); | |
664 | }; | |
665 | const conditionalReset = (arrName) => { | |
666 | if (this[arrName]) { | |
667 | // Refreshing: delete old pieces first. This isn't necessary, | |
668 | // but simpler (this method isn't called many times) | |
669 | for (let i=0; i<this.size.x; i++) { | |
670 | for (let j=0; j<this.size.y; j++) { | |
671 | if (this[arrName][i][j]) { | |
672 | this[arrName][i][j].remove(); | |
673 | this[arrName][i][j] = null; | |
674 | } | |
675 | } | |
676 | } | |
677 | } | |
678 | else | |
679 | this[arrName] = ArrayFun.init(this.size.x, this.size.y, null); | |
680 | if (arrName == "d_pieces") | |
681 | this.marks.forEach(([i, j]) => addPiece(i, j, arrName, "mark")); | |
682 | }; | |
683 | if (this.marks) | |
684 | conditionalReset("d_pieces"); | |
685 | conditionalReset("g_pieces"); | |
41534b92 BA |
686 | for (let i=0; i < this.size.x; i++) { |
687 | for (let j=0; j < this.size.y; j++) { | |
c9ab0340 | 688 | if (this.board[i][j] != "") { |
41534b92 | 689 | const color = this.getColor(i, j); |
cc2c7183 | 690 | const piece = this.getPiece(i, j); |
b2fc1259 | 691 | addPiece(i, j, "g_pieces", this.pieces(color, i, j)[piece]["class"]); |
15106e82 | 692 | this.g_pieces[i][j].classList.add(C.GetColorClass(color)); |
c9ab0340 BA |
693 | if (this.enlightened && !this.enlightened[i][j]) |
694 | this.g_pieces[i][j].classList.add("hidden"); | |
b2fc1259 BA |
695 | } |
696 | if (this.marks && this.d_pieces[i][j]) { | |
697 | let classes = ["mark"]; | |
698 | if (this.board[i][j] != "") | |
699 | classes.push("transparent"); | |
700 | addPiece(i, j, "d_pieces", classes); | |
41534b92 BA |
701 | } |
702 | } | |
703 | } | |
549ca151 | 704 | if (this.hasReserve && !this.isDiagram) |
b4ae3ff6 | 705 | this.re_drawReserve(['w', 'b'], r); |
41534b92 BA |
706 | } |
707 | ||
24872b22 | 708 | // NOTE: assume this.reserve != null |
41534b92 BA |
709 | re_drawReserve(colors, r) { |
710 | if (this.r_pieces) { | |
711 | // Remove (old) reserve pieces | |
712 | for (let c of colors) { | |
24872b22 BA |
713 | Object.keys(this.r_pieces[c]).forEach(p => { |
714 | this.r_pieces[c][p].remove(); | |
715 | delete this.r_pieces[c][p]; | |
716 | const numId = this.getReserveNumId(c, p); | |
717 | document.getElementById(numId).remove(); | |
41534b92 | 718 | }); |
41534b92 BA |
719 | } |
720 | } | |
b4ae3ff6 | 721 | else |
9db5050a BA |
722 | this.r_pieces = { w: {}, b: {} }; |
723 | let container = document.getElementById(this.containerId); | |
b4ae3ff6 | 724 | if (!r) |
9db5050a | 725 | r = container.querySelector(".chessboard").getBoundingClientRect(); |
41534b92 | 726 | for (let c of colors) { |
24872b22 BA |
727 | let reservesDiv = document.getElementById("reserves_" + c); |
728 | if (reservesDiv) | |
729 | reservesDiv.remove(); | |
b4ae3ff6 BA |
730 | if (!this.reserve[c]) |
731 | continue; | |
41534b92 | 732 | const nbR = this.getNbReservePieces(c); |
b4ae3ff6 BA |
733 | if (nbR == 0) |
734 | continue; | |
41534b92 BA |
735 | const sqResSize = this.getReserveSquareSize(r.width, nbR); |
736 | let ridx = 0; | |
737 | const vShift = (c == this.playerColor ? r.height + 5 : -sqResSize - 5); | |
738 | const [i0, j0] = [r.x, r.y + vShift]; | |
739 | let rcontainer = document.createElement("div"); | |
740 | rcontainer.id = "reserves_" + c; | |
741 | rcontainer.classList.add("reserves"); | |
742 | rcontainer.style.left = i0 + "px"; | |
743 | rcontainer.style.top = j0 + "px"; | |
1aa9054d BA |
744 | // NOTE: +1 fix display bug on Firefox at least |
745 | rcontainer.style.width = (nbR * sqResSize + 1) + "px"; | |
41534b92 | 746 | rcontainer.style.height = sqResSize + "px"; |
9db5050a | 747 | container.appendChild(rcontainer); |
41534b92 | 748 | for (let p of Object.keys(this.reserve[c])) { |
b4ae3ff6 BA |
749 | if (this.reserve[c][p] == 0) |
750 | continue; | |
41534b92 | 751 | let r_cell = document.createElement("div"); |
15106e82 | 752 | r_cell.id = this.coordsToId({x: c, y: p}); |
41534b92 | 753 | r_cell.classList.add("reserve-cell"); |
1aa9054d BA |
754 | r_cell.style.width = sqResSize + "px"; |
755 | r_cell.style.height = sqResSize + "px"; | |
41534b92 BA |
756 | rcontainer.appendChild(r_cell); |
757 | let piece = document.createElement("piece"); | |
2159c239 | 758 | C.AddClass_es(piece, this.pieces(c, c, p)[p]["class"]); |
15106e82 | 759 | piece.classList.add(C.GetColorClass(c)); |
41534b92 BA |
760 | piece.style.width = "100%"; |
761 | piece.style.height = "100%"; | |
762 | this.r_pieces[c][p] = piece; | |
763 | r_cell.appendChild(piece); | |
764 | let number = document.createElement("div"); | |
765 | number.textContent = this.reserve[c][p]; | |
766 | number.classList.add("reserve-num"); | |
767 | number.id = this.getReserveNumId(c, p); | |
768 | const fontSize = "1.3em"; | |
769 | number.style.fontSize = fontSize; | |
770 | number.style.fontSize = fontSize; | |
771 | r_cell.appendChild(number); | |
772 | ridx++; | |
773 | } | |
774 | } | |
775 | } | |
776 | ||
777 | updateReserve(color, piece, count) { | |
55a15dcb | 778 | if (this.options["cannibal"] && C.CannibalKings[piece]) |
cc2c7183 | 779 | piece = "k"; //capturing cannibal king: back to king form |
41534b92 BA |
780 | const oldCount = this.reserve[color][piece]; |
781 | this.reserve[color][piece] = count; | |
182ba661 BA |
782 | // Redrawing is much easier if count==0 (or undefined) |
783 | if ([oldCount, count].some(item => !item)) | |
b4ae3ff6 | 784 | this.re_drawReserve([color]); |
41534b92 BA |
785 | else { |
786 | const numId = this.getReserveNumId(color, piece); | |
787 | document.getElementById(numId).textContent = count; | |
788 | } | |
789 | } | |
790 | ||
c4e9bb92 BA |
791 | // Resize board: no need to destroy/recreate pieces |
792 | rescale(mode) { | |
e7b64798 BA |
793 | const container = document.getElementById(this.containerId); |
794 | let chessboard = container.querySelector(".chessboard"); | |
795 | const rc = container.getBoundingClientRect(), | |
796 | r = chessboard.getBoundingClientRect(); | |
c4e9bb92 BA |
797 | const multFact = (mode == "up" ? 1.05 : 0.95); |
798 | let [newWidth, newHeight] = [multFact * r.width, multFact * r.height]; | |
535c464b | 799 | // Stay in window: |
f55a0a67 | 800 | const vRatio = this.size.ratio || 1; |
e7b64798 BA |
801 | if (newWidth > rc.width) { |
802 | newWidth = rc.width; | |
f55a0a67 | 803 | newHeight = newWidth / vRatio; |
c4e9bb92 | 804 | } |
e7b64798 BA |
805 | if (newHeight > rc.height) { |
806 | newHeight = rc.height; | |
f55a0a67 | 807 | newWidth = newHeight * vRatio; |
c4e9bb92 | 808 | } |
535c464b BA |
809 | chessboard.style.width = newWidth + "px"; |
810 | chessboard.style.height = newHeight + "px"; | |
e7b64798 | 811 | const newX = (rc.width - newWidth) / 2; |
3c61449b | 812 | chessboard.style.left = newX + "px"; |
e7b64798 | 813 | const newY = (rc.height - newHeight) / 2; |
3c61449b | 814 | chessboard.style.top = newY + "px"; |
9db5050a | 815 | const newR = {x: newX, y: newY, width: newWidth, height: newHeight}; |
c4e9bb92 | 816 | const pieceWidth = this.getPieceWidth(newWidth); |
d621e620 BA |
817 | // NOTE: next "if" for variants which use squares filling |
818 | // instead of "physical", moving pieces | |
819 | if (this.g_pieces) { | |
c4e9bb92 BA |
820 | for (let i=0; i < this.size.x; i++) { |
821 | for (let j=0; j < this.size.y; j++) { | |
822 | if (this.g_pieces[i][j]) { | |
d621e620 | 823 | // NOTE: could also use CSS transform "scale" |
c4e9bb92 BA |
824 | this.g_pieces[i][j].style.width = pieceWidth + "px"; |
825 | this.g_pieces[i][j].style.height = pieceWidth + "px"; | |
826 | const [ip, jp] = this.getPixelPosition(i, j, newR); | |
d621e620 | 827 | // Translate coordinates to use chessboard as reference: |
c4e9bb92 | 828 | this.g_pieces[i][j].style.transform = |
d621e620 BA |
829 | `translate(${ip - newX}px,${jp - newY}px)`; |
830 | } | |
41534b92 BA |
831 | } |
832 | } | |
833 | } | |
b2fc1259 | 834 | if (this.hasReserve) |
c4e9bb92 | 835 | this.rescaleReserve(newR); |
41534b92 BA |
836 | } |
837 | ||
838 | rescaleReserve(r) { | |
41534b92 | 839 | for (let c of ['w','b']) { |
b4ae3ff6 BA |
840 | if (!this.reserve[c]) |
841 | continue; | |
41534b92 | 842 | const nbR = this.getNbReservePieces(c); |
b4ae3ff6 BA |
843 | if (nbR == 0) |
844 | continue; | |
41534b92 BA |
845 | // Resize container first |
846 | const sqResSize = this.getReserveSquareSize(r.width, nbR); | |
847 | const vShift = (c == this.playerColor ? r.height + 5 : -sqResSize - 5); | |
848 | const [i0, j0] = [r.x, r.y + vShift]; | |
849 | let rcontainer = document.getElementById("reserves_" + c); | |
850 | rcontainer.style.left = i0 + "px"; | |
851 | rcontainer.style.top = j0 + "px"; | |
1aa9054d | 852 | rcontainer.style.width = (nbR * sqResSize + 1) + "px"; |
41534b92 BA |
853 | rcontainer.style.height = sqResSize + "px"; |
854 | // And then reserve cells: | |
855 | const rpieceWidth = this.getReserveSquareSize(r.width, nbR); | |
856 | Object.keys(this.reserve[c]).forEach(p => { | |
b4ae3ff6 BA |
857 | if (this.reserve[c][p] == 0) |
858 | return; | |
15106e82 | 859 | let r_cell = document.getElementById(this.coordsToId({x: c, y: p})); |
1aa9054d BA |
860 | r_cell.style.width = sqResSize + "px"; |
861 | r_cell.style.height = sqResSize + "px"; | |
41534b92 BA |
862 | }); |
863 | } | |
864 | } | |
865 | ||
9db5050a | 866 | // Return the absolute pixel coordinates given current position. |
41534b92 BA |
867 | // Our coordinate system differs from CSS one (x <--> y). |
868 | // We return here the CSS coordinates (more useful). | |
869 | getPixelPosition(i, j, r) { | |
b4ae3ff6 BA |
870 | if (i < 0 || j < 0) |
871 | return [0, 0]; //piece vanishes | |
15106e82 BA |
872 | let x, y; |
873 | if (typeof i == "string") { | |
874 | // Reserves: need to know the rank of piece | |
875 | const nbR = this.getNbReservePieces(i); | |
876 | const rsqSize = this.getReserveSquareSize(r.width, nbR); | |
877 | x = this.getRankInReserve(i, j) * rsqSize; | |
878 | y = (this.playerColor == i ? y = r.height + 5 : - 5 - rsqSize); | |
879 | } | |
880 | else { | |
881 | const sqSize = r.width / this.size.y; | |
882 | const flipped = (this.playerColor == 'b'); | |
883 | x = (flipped ? this.size.y - 1 - j : j) * sqSize; | |
884 | y = (flipped ? this.size.x - 1 - i : i) * sqSize; | |
885 | } | |
9db5050a | 886 | return [r.x + x, r.y + y]; |
41534b92 BA |
887 | } |
888 | ||
889 | initMouseEvents() { | |
9db5050a BA |
890 | let container = document.getElementById(this.containerId); |
891 | let chessboard = container.querySelector(".chessboard"); | |
41534b92 BA |
892 | |
893 | const getOffset = e => { | |
3c61449b BA |
894 | if (e.clientX) |
895 | // Mouse | |
896 | return {x: e.clientX, y: e.clientY}; | |
41534b92 BA |
897 | let touchLocation = null; |
898 | if (e.targetTouches && e.targetTouches.length >= 1) | |
899 | // Touch screen, dragstart | |
900 | touchLocation = e.targetTouches[0]; | |
901 | else if (e.changedTouches && e.changedTouches.length >= 1) | |
902 | // Touch screen, dragend | |
903 | touchLocation = e.changedTouches[0]; | |
904 | if (touchLocation) | |
11625344 | 905 | return {x: touchLocation.clientX, y: touchLocation.clientY}; |
57b8015b | 906 | return {x: 0, y: 0}; //shouldn't reach here =) |
41534b92 BA |
907 | } |
908 | ||
909 | const centerOnCursor = (piece, e) => { | |
15106e82 | 910 | const centerShift = this.getPieceWidth(r.width) / 2; |
41534b92 | 911 | const offset = getOffset(e); |
9db5050a BA |
912 | piece.style.left = (offset.x - centerShift) + "px"; |
913 | piece.style.top = (offset.y - centerShift) + "px"; | |
41534b92 BA |
914 | } |
915 | ||
916 | let start = null, | |
917 | r = null, | |
918 | startPiece, curPiece = null, | |
15106e82 | 919 | pieceWidth; |
41534b92 | 920 | const mousedown = (e) => { |
cb17fed8 | 921 | // Disable zoom on smartphones: |
b4ae3ff6 BA |
922 | if (e.touches && e.touches.length > 1) |
923 | e.preventDefault(); | |
3c61449b | 924 | r = chessboard.getBoundingClientRect(); |
15106e82 BA |
925 | pieceWidth = this.getPieceWidth(r.width); |
926 | const cd = this.idToCoords(e.target.id); | |
927 | if (cd) { | |
928 | const move = this.doClick(cd); | |
b4ae3ff6 | 929 | if (move) |
e7d409fc | 930 | this.buildMoveStack(move, r); |
6b9320bb | 931 | else if (!this.clickOnly) { |
15106e82 BA |
932 | const [x, y] = Object.values(cd); |
933 | if (typeof x != "number") | |
934 | startPiece = this.r_pieces[x][y]; | |
935 | else | |
936 | startPiece = this.g_pieces[x][y]; | |
937 | if (startPiece && this.canIplay(x, y)) { | |
41534b92 | 938 | e.preventDefault(); |
15106e82 | 939 | start = cd; |
41534b92 BA |
940 | curPiece = startPiece.cloneNode(); |
941 | curPiece.style.transform = "none"; | |
942 | curPiece.style.zIndex = 5; | |
15106e82 BA |
943 | curPiece.style.width = pieceWidth + "px"; |
944 | curPiece.style.height = pieceWidth + "px"; | |
41534b92 | 945 | centerOnCursor(curPiece, e); |
9db5050a | 946 | container.appendChild(curPiece); |
41534b92 | 947 | startPiece.style.opacity = "0.4"; |
3c61449b | 948 | chessboard.style.cursor = "none"; |
41534b92 BA |
949 | } |
950 | } | |
951 | } | |
952 | }; | |
953 | ||
954 | const mousemove = (e) => { | |
955 | if (start) { | |
956 | e.preventDefault(); | |
957 | centerOnCursor(curPiece, e); | |
958 | } | |
11625344 BA |
959 | else if (e.changedTouches && e.changedTouches.length >= 1) |
960 | // Attempt to prevent horizontal swipe... | |
961 | e.preventDefault(); | |
41534b92 BA |
962 | }; |
963 | ||
964 | const mouseup = (e) => { | |
b4ae3ff6 BA |
965 | if (!start) |
966 | return; | |
41534b92 BA |
967 | const [x, y] = [start.x, start.y]; |
968 | start = null; | |
969 | e.preventDefault(); | |
3c61449b | 970 | chessboard.style.cursor = "pointer"; |
41534b92 BA |
971 | startPiece.style.opacity = "1"; |
972 | const offset = getOffset(e); | |
973 | const landingElt = document.elementFromPoint(offset.x, offset.y); | |
15106e82 BA |
974 | const cd = |
975 | (landingElt ? this.idToCoords(landingElt.id) : undefined); | |
976 | if (cd) { | |
41534b92 BA |
977 | // NOTE: clearly suboptimal, but much easier, and not a big deal. |
978 | const potentialMoves = this.getPotentialMovesFrom([x, y]) | |
15106e82 | 979 | .filter(m => m.end.x == cd.x && m.end.y == cd.y); |
41534b92 | 980 | const moves = this.filterValid(potentialMoves); |
b4ae3ff6 BA |
981 | if (moves.length >= 2) |
982 | this.showChoices(moves, r); | |
983 | else if (moves.length == 1) | |
e7d409fc | 984 | this.buildMoveStack(moves[0], r); |
41534b92 BA |
985 | } |
986 | curPiece.remove(); | |
987 | }; | |
988 | ||
a5da6269 BA |
989 | const resize = (e) => this.rescale(e.deltaY < 0 ? "up" : "down"); |
990 | ||
41534b92 | 991 | if ('onmousedown' in window) { |
a5da6269 BA |
992 | this.mouseListeners = [ |
993 | {type: "mousedown", listener: mousedown}, | |
994 | {type: "mousemove", listener: mousemove}, | |
995 | {type: "mouseup", listener: mouseup}, | |
996 | {type: "wheel", listener: resize} | |
997 | ]; | |
998 | this.mouseListeners.forEach(ml => { | |
999 | document.addEventListener(ml.type, ml.listener); | |
1000 | }); | |
41534b92 BA |
1001 | } |
1002 | if ('ontouchstart' in window) { | |
a5da6269 BA |
1003 | this.touchListeners = [ |
1004 | {type: "touchstart", listener: mousedown}, | |
1005 | {type: "touchmove", listener: mousemove}, | |
1006 | {type: "touchend", listener: mouseup} | |
1007 | ]; | |
1008 | this.touchListeners.forEach(tl => { | |
1009 | // https://stackoverflow.com/a/42509310/12660887 | |
1010 | document.addEventListener(tl.type, tl.listener, {passive: false}); | |
1011 | }); | |
41534b92 | 1012 | } |
11625344 | 1013 | // TODO: onpointerdown/move/up ? See reveal.js /controllers/touch.js |
41534b92 BA |
1014 | } |
1015 | ||
27a6d311 | 1016 | // NOTE: not called if isDiagram, or genFenOnly |
a5da6269 | 1017 | removeListeners() { |
549ca151 BA |
1018 | let container = document.getElementById(this.containerId); |
1019 | this.windowResizeObs.unobserve(container); | |
a5da6269 BA |
1020 | if ('onmousedown' in window) { |
1021 | this.mouseListeners.forEach(ml => { | |
1022 | document.removeEventListener(ml.type, ml.listener); | |
1023 | }); | |
1024 | } | |
1025 | if ('ontouchstart' in window) { | |
1026 | this.touchListeners.forEach(tl => { | |
1027 | // https://stackoverflow.com/a/42509310/12660887 | |
1028 | document.removeEventListener(tl.type, tl.listener); | |
1029 | }); | |
1030 | } | |
1031 | } | |
1032 | ||
41534b92 BA |
1033 | showChoices(moves, r) { |
1034 | let container = document.getElementById(this.containerId); | |
3c61449b | 1035 | let chessboard = container.querySelector(".chessboard"); |
41534b92 BA |
1036 | let choices = document.createElement("div"); |
1037 | choices.id = "choices"; | |
a2bb7e06 BA |
1038 | if (!r) |
1039 | r = chessboard.getBoundingClientRect(); | |
41534b92 BA |
1040 | choices.style.width = r.width + "px"; |
1041 | choices.style.height = r.height + "px"; | |
1042 | choices.style.left = r.x + "px"; | |
1043 | choices.style.top = r.y + "px"; | |
3c61449b BA |
1044 | chessboard.style.opacity = "0.5"; |
1045 | container.appendChild(choices); | |
15106e82 | 1046 | const squareWidth = r.width / this.size.y; |
41534b92 BA |
1047 | const firstUpLeft = (r.width - (moves.length * squareWidth)) / 2; |
1048 | const firstUpTop = (r.height - squareWidth) / 2; | |
1049 | const color = moves[0].appear[0].c; | |
1050 | const callback = (m) => { | |
3c61449b BA |
1051 | chessboard.style.opacity = "1"; |
1052 | container.removeChild(choices); | |
e7d409fc | 1053 | this.buildMoveStack(m, r); |
41534b92 BA |
1054 | } |
1055 | for (let i=0; i < moves.length; i++) { | |
1056 | let choice = document.createElement("div"); | |
1057 | choice.classList.add("choice"); | |
1058 | choice.style.width = squareWidth + "px"; | |
1059 | choice.style.height = squareWidth + "px"; | |
1060 | choice.style.left = (firstUpLeft + i * squareWidth) + "px"; | |
1061 | choice.style.top = firstUpTop + "px"; | |
1062 | choice.style.backgroundColor = "lightyellow"; | |
1063 | choice.onclick = () => callback(moves[i]); | |
1064 | const piece = document.createElement("piece"); | |
3b641716 | 1065 | const cdisp = moves[i].choice || moves[i].appear[0].p; |
2159c239 BA |
1066 | C.AddClass_es(piece, |
1067 | this.pieces(color, moves[i].end.x, moves[i].end.y)[cdisp]["class"]); | |
15106e82 | 1068 | piece.classList.add(C.GetColorClass(color)); |
41534b92 BA |
1069 | piece.style.width = "100%"; |
1070 | piece.style.height = "100%"; | |
1071 | choice.appendChild(piece); | |
1072 | choices.appendChild(choice); | |
1073 | } | |
1074 | } | |
1075 | ||
98d14451 BA |
1076 | displayMessage(elt, msg, classe_s, timeout) { |
1077 | if (elt) | |
1078 | // Fixed element, e.g. for Dice Chess | |
1079 | elt.innerHTML = msg; | |
1080 | else { | |
1081 | // Temporary div (Chakart, Apocalypse...) | |
1082 | let divMsg = document.createElement("div"); | |
1083 | C.AddClass_es(divMsg, classe_s); | |
1084 | divMsg.innerHTML = msg; | |
1085 | let container = document.getElementById(this.containerId); | |
1086 | container.appendChild(divMsg); | |
1087 | setTimeout(() => container.removeChild(divMsg), timeout); | |
1088 | } | |
1089 | } | |
1090 | ||
ca8a3993 BA |
1091 | //////////////// |
1092 | // DARK METHODS | |
1093 | ||
1094 | updateEnlightened() { | |
1095 | this.oldEnlightened = this.enlightened; | |
1096 | this.enlightened = ArrayFun.init(this.size.x, this.size.y, false); | |
1097 | // Add pieces positions + all squares reachable by moves (includes Zen): | |
1098 | for (let x=0; x<this.size.x; x++) { | |
1099 | for (let y=0; y<this.size.y; y++) { | |
1100 | if (this.board[x][y] != "" && this.getColor(x, y) == this.playerColor) | |
1101 | { | |
1102 | this.enlightened[x][y] = true; | |
1103 | this.getPotentialMovesFrom([x, y]).forEach(m => { | |
1104 | this.enlightened[m.end.x][m.end.y] = true; | |
1105 | }); | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | if (this.epSquare) | |
1110 | this.enlightEnpassant(); | |
1111 | } | |
1112 | ||
1113 | // Include square of the en-passant capturing square: | |
1114 | enlightEnpassant() { | |
1115 | // NOTE: shortcut, pawn has only one attack type, doesn't depend on square | |
1116 | const steps = this.pieces(this.playerColor)["p"].attack[0].steps; | |
1117 | for (let step of steps) { | |
1118 | const x = this.epSquare.x - step[0], | |
1119 | y = this.getY(this.epSquare.y - step[1]); | |
1120 | if ( | |
1121 | this.onBoard(x, y) && | |
1122 | this.getColor(x, y) == this.playerColor && | |
1123 | this.getPieceType(x, y) == "p" | |
1124 | ) { | |
1125 | this.enlightened[x][this.epSquare.y] = true; | |
1126 | break; | |
1127 | } | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | // Apply diff this.enlightened --> oldEnlightened on board | |
1132 | graphUpdateEnlightened() { | |
1133 | let chessboard = | |
1134 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
1135 | const r = chessboard.getBoundingClientRect(); | |
1136 | const pieceWidth = this.getPieceWidth(r.width); | |
1137 | for (let x=0; x<this.size.x; x++) { | |
1138 | for (let y=0; y<this.size.y; y++) { | |
1139 | if (!this.enlightened[x][y] && this.oldEnlightened[x][y]) { | |
1140 | let elt = document.getElementById(this.coordsToId({x: x, y: y})); | |
1141 | elt.classList.add("in-shadow"); | |
1142 | if (this.g_pieces[x][y]) | |
1143 | this.g_pieces[x][y].classList.add("hidden"); | |
1144 | } | |
1145 | else if (this.enlightened[x][y] && !this.oldEnlightened[x][y]) { | |
1146 | let elt = document.getElementById(this.coordsToId({x: x, y: y})); | |
1147 | elt.classList.remove("in-shadow"); | |
1148 | if (this.g_pieces[x][y]) | |
1149 | this.g_pieces[x][y].classList.remove("hidden"); | |
1150 | } | |
1151 | } | |
1152 | } | |
1153 | } | |
1154 | ||
41534b92 BA |
1155 | ////////////// |
1156 | // BASIC UTILS | |
1157 | ||
1158 | get size() { | |
15106e82 BA |
1159 | return { |
1160 | x: 8, | |
1161 | y: 8, | |
f55a0a67 | 1162 | ratio: 1 //for rectangular board = y / x (optional, 1 = default) |
15106e82 | 1163 | }; |
41534b92 BA |
1164 | } |
1165 | ||
ca8a3993 | 1166 | // Color of thing on square (i,j). '' if square is empty |
41534b92 | 1167 | getColor(i, j) { |
15106e82 BA |
1168 | if (typeof i == "string") |
1169 | return i; //reserves | |
41534b92 BA |
1170 | return this.board[i][j].charAt(0); |
1171 | } | |
1172 | ||
15106e82 | 1173 | static GetColorClass(c) { |
bc2bc396 BA |
1174 | if (c == 'w') |
1175 | return "white"; | |
1176 | if (c == 'b') | |
1177 | return "black"; | |
24872b22 | 1178 | return "other-color"; //unidentified color |
15106e82 BA |
1179 | } |
1180 | ||
ca8a3993 | 1181 | // Piece on i,j. '' if square is empty |
41534b92 | 1182 | getPiece(i, j) { |
15106e82 BA |
1183 | if (typeof j == "string") |
1184 | return j; //reserves | |
41534b92 BA |
1185 | return this.board[i][j].charAt(1); |
1186 | } | |
1187 | ||
cc2c7183 | 1188 | // Piece type on square (i,j) |
6b9320bb | 1189 | getPieceType(x, y, p) { |
65cf1690 | 1190 | if (!p) |
6b9320bb BA |
1191 | p = this.getPiece(x, y); |
1192 | return this.pieces()[p].moveas || p; | |
1193 | } | |
1194 | ||
1195 | isKing(x, y, p) { | |
1196 | if (!p) | |
1197 | p = this.getPiece(x, y); | |
1198 | if (!this.options["cannibal"]) | |
1199 | return p == 'k'; | |
1200 | return !!C.CannibalKings[p]; | |
cc2c7183 BA |
1201 | } |
1202 | ||
41534b92 BA |
1203 | // Get opponent color |
1204 | static GetOppCol(color) { | |
1205 | return (color == "w" ? "b" : "w"); | |
1206 | } | |
1207 | ||
41534b92 BA |
1208 | // Is (x,y) on the chessboard? |
1209 | onBoard(x, y) { | |
b99ce1fb BA |
1210 | return (x >= 0 && x < this.size.x && |
1211 | y >= 0 && y < this.size.y); | |
41534b92 BA |
1212 | } |
1213 | ||
15106e82 | 1214 | // Am I allowed to move thing at square x,y ? |
41534b92 | 1215 | canIplay(x, y) { |
0c44c676 | 1216 | return (this.playerColor == this.turn && this.getColor(x, y) == this.turn); |
41534b92 BA |
1217 | } |
1218 | ||
1219 | //////////////////////// | |
1220 | // PIECES SPECIFICATIONS | |
1221 | ||
c9ab0340 | 1222 | pieces(color, x, y) { |
41534b92 | 1223 | const pawnShift = (color == "w" ? -1 : 1); |
9db5050a BA |
1224 | // NOTE: jump 2 squares from first rank (pawns can be here sometimes) |
1225 | const initRank = ((color == 'w' && x >= 6) || (color == 'b' && x <= 1)); | |
41534b92 BA |
1226 | return { |
1227 | 'p': { | |
1228 | "class": "pawn", | |
c9ab0340 BA |
1229 | moves: [ |
1230 | { | |
1231 | steps: [[pawnShift, 0]], | |
1232 | range: (initRank ? 2 : 1) | |
1233 | } | |
1234 | ], | |
1235 | attack: [ | |
1236 | { | |
1237 | steps: [[pawnShift, 1], [pawnShift, -1]], | |
1238 | range: 1 | |
1239 | } | |
1240 | ] | |
41534b92 | 1241 | }, |
41534b92 BA |
1242 | 'r': { |
1243 | "class": "rook", | |
33b42748 | 1244 | both: [ |
c9ab0340 BA |
1245 | {steps: [[0, 1], [0, -1], [1, 0], [-1, 0]]} |
1246 | ] | |
41534b92 | 1247 | }, |
41534b92 BA |
1248 | 'n': { |
1249 | "class": "knight", | |
33b42748 | 1250 | both: [ |
c9ab0340 BA |
1251 | { |
1252 | steps: [ | |
1253 | [1, 2], [1, -2], [-1, 2], [-1, -2], | |
1254 | [2, 1], [-2, 1], [2, -1], [-2, -1] | |
1255 | ], | |
1256 | range: 1 | |
1257 | } | |
1258 | ] | |
41534b92 | 1259 | }, |
41534b92 BA |
1260 | 'b': { |
1261 | "class": "bishop", | |
33b42748 | 1262 | both: [ |
c9ab0340 BA |
1263 | {steps: [[1, 1], [1, -1], [-1, 1], [-1, -1]]} |
1264 | ] | |
41534b92 | 1265 | }, |
41534b92 BA |
1266 | 'q': { |
1267 | "class": "queen", | |
33b42748 | 1268 | both: [ |
c9ab0340 BA |
1269 | { |
1270 | steps: [ | |
1271 | [0, 1], [0, -1], [1, 0], [-1, 0], | |
1272 | [1, 1], [1, -1], [-1, 1], [-1, -1] | |
1273 | ] | |
1274 | } | |
41534b92 BA |
1275 | ] |
1276 | }, | |
41534b92 BA |
1277 | 'k': { |
1278 | "class": "king", | |
33b42748 | 1279 | both: [ |
c9ab0340 BA |
1280 | { |
1281 | steps: [ | |
1282 | [0, 1], [0, -1], [1, 0], [-1, 0], | |
1283 | [1, 1], [1, -1], [-1, 1], [-1, -1] | |
1284 | ], | |
1285 | range: 1 | |
1286 | } | |
1287 | ] | |
cc2c7183 BA |
1288 | }, |
1289 | // Cannibal kings: | |
c9ab0340 BA |
1290 | '!': {"class": "king-pawn", moveas: "p"}, |
1291 | '#': {"class": "king-rook", moveas: "r"}, | |
1292 | '$': {"class": "king-knight", moveas: "n"}, | |
1293 | '%': {"class": "king-bishop", moveas: "b"}, | |
1294 | '*': {"class": "king-queen", moveas: "q"} | |
41534b92 BA |
1295 | }; |
1296 | } | |
1297 | ||
af9c9be3 BA |
1298 | // NOTE: using special symbols to not interfere with variants' pieces codes |
1299 | static get CannibalKings() { | |
1300 | return { | |
1301 | "!": "p", | |
1302 | "#": "r", | |
1303 | "$": "n", | |
1304 | "%": "b", | |
1305 | "*": "q", | |
1306 | "k": "k" | |
1307 | }; | |
1308 | } | |
1309 | ||
1310 | static get CannibalKingCode() { | |
1311 | return { | |
1312 | "p": "!", | |
1313 | "r": "#", | |
1314 | "n": "$", | |
1315 | "b": "%", | |
1316 | "q": "*", | |
1317 | "k": "k" | |
1318 | }; | |
1319 | } | |
1320 | ||
1321 | ////////////////////////// | |
1322 | // MOVES GENERATION UTILS | |
41534b92 | 1323 | |
adf7c659 BA |
1324 | // For Cylinder: get Y coordinate |
1325 | getY(y) { | |
b4ae3ff6 BA |
1326 | if (!this.options["cylinder"]) |
1327 | return y; | |
41534b92 | 1328 | let res = y % this.size.y; |
b4ae3ff6 | 1329 | if (res < 0) |
adf7c659 | 1330 | res += this.size.y; |
41534b92 BA |
1331 | return res; |
1332 | } | |
1333 | ||
ca8a3993 BA |
1334 | getSegments(curSeg, segStart, segEnd) { |
1335 | if (curSeg.length == 0) | |
1336 | return undefined; | |
1337 | let segments = JSON.parse(JSON.stringify(curSeg)); //not altering | |
1338 | segments.push([[segStart[0], segStart[1]], [segEnd[0], segEnd[1]]]); | |
1339 | return segments; | |
1340 | } | |
1341 | ||
6b9320bb | 1342 | getStepSpec(color, x, y, piece) { |
0e466aac | 1343 | let pieceType = piece; |
33b42748 | 1344 | let allSpecs = this.pieces(color, x, y); |
0e466aac BA |
1345 | if (!piece) |
1346 | pieceType = this.getPieceType(x, y); | |
1347 | else if (allSpecs[piece].moveas) | |
1348 | pieceType = allSpecs[piece].moveas; | |
33b42748 BA |
1349 | let res = allSpecs[pieceType]; |
1350 | if (!res["both"]) | |
1351 | res.both = []; | |
1352 | if (!res["moves"]) | |
1353 | res.moves = []; | |
1354 | if (!res["attack"]) | |
1355 | res.attack = []; | |
1356 | return res; | |
ca8a3993 BA |
1357 | } |
1358 | ||
af9c9be3 BA |
1359 | // Can thing on square1 capture thing on square2? |
1360 | canTake([x1, y1], [x2, y2]) { | |
1361 | return this.getColor(x1, y1) !== this.getColor(x2, y2); | |
1362 | } | |
1363 | ||
1364 | canStepOver(i, j, p) { | |
1365 | // In some variants, objects on boards don't stop movement (Chakart) | |
1366 | return this.board[i][j] == ""; | |
1367 | } | |
1368 | ||
ca8a3993 BA |
1369 | canDrop([c, p], [i, j]) { |
1370 | return ( | |
1371 | this.board[i][j] == "" && | |
1372 | (!this.enlightened || this.enlightened[i][j]) && | |
1373 | ( | |
1374 | p != "p" || | |
1375 | (c == 'w' && i < this.size.x - 1) || | |
1376 | (c == 'b' && i > 0) | |
1377 | ) | |
1378 | ); | |
1379 | } | |
1380 | ||
af9c9be3 BA |
1381 | // For Madrasi: |
1382 | // (redefined in Baroque etc, where Madrasi condition doesn't make sense) | |
1383 | isImmobilized([x, y]) { | |
1384 | if (!this.options["madrasi"]) | |
1385 | return false; | |
1386 | const color = this.getColor(x, y); | |
1387 | const oppCol = C.GetOppCol(color); | |
6b9320bb BA |
1388 | const piece = this.getPieceType(x, y); |
1389 | const stepSpec = this.getStepSpec(color, x, y, piece); | |
33b42748 | 1390 | const attacks = stepSpec.both.concat(stepSpec.attack); |
af9c9be3 BA |
1391 | for (let a of attacks) { |
1392 | outerLoop: for (let step of a.steps) { | |
1393 | let [i, j] = [x + step[0], y + step[1]]; | |
1394 | let stepCounter = 1; | |
1395 | while (this.onBoard(i, j) && this.board[i][j] == "") { | |
1396 | if (a.range <= stepCounter++) | |
1397 | continue outerLoop; | |
1398 | i += step[0]; | |
1399 | j = this.getY(j + step[1]); | |
1400 | } | |
1401 | if ( | |
1402 | this.onBoard(i, j) && | |
1403 | this.getColor(i, j) == oppCol && | |
1404 | this.getPieceType(i, j) == piece | |
1405 | ) { | |
1406 | return true; | |
1407 | } | |
1408 | } | |
1409 | } | |
1410 | return false; | |
1411 | } | |
1412 | ||
41534b92 BA |
1413 | // Stop at the first capture found |
1414 | atLeastOneCapture(color) { | |
cc2c7183 | 1415 | const oppCol = C.GetOppCol(color); |
6b9320bb BA |
1416 | const allowed = (sq1, sq2) => { |
1417 | return ( | |
1418 | // NOTE: canTake is reversed for Zen. | |
1419 | // Generally ok because of the symmetry. TODO? | |
1420 | this.canTake(sq1, sq2) && | |
1421 | this.filterValid( | |
1422 | [this.getBasicMove(sq1, sq2)]).length >= 1 | |
1423 | ); | |
af9c9be3 BA |
1424 | }; |
1425 | for (let i=0; i<this.size.x; i++) { | |
1426 | for (let j=0; j<this.size.y; j++) { | |
1427 | if (this.getColor(i, j) == color) { | |
1428 | if ( | |
6b9320bb BA |
1429 | ( |
1430 | !this.options["zen"] && | |
1431 | this.findDestSquares( | |
1432 | [i, j], | |
1433 | { | |
1434 | attackOnly: true, | |
1435 | one: true, | |
1436 | segments: this.options["cylinder"] | |
1437 | }, | |
1438 | allowed | |
1439 | ) | |
1440 | ) | |
1441 | || | |
1442 | ( | |
1443 | ( | |
1444 | this.options["zen"] && | |
1445 | this.findCapturesOn( | |
1446 | [i, j], | |
1447 | { | |
1448 | one: true, | |
1449 | segments: this.options["cylinder"] | |
1450 | }, | |
1451 | allowed | |
1452 | ) | |
1453 | ) | |
1454 | ) | |
af9c9be3 BA |
1455 | ) { |
1456 | return true; | |
41534b92 BA |
1457 | } |
1458 | } | |
1459 | } | |
1460 | } | |
1461 | return false; | |
1462 | } | |
1463 | ||
af9c9be3 | 1464 | compatibleStep([x1, y1], [x2, y2], step, range) { |
6b9320bb | 1465 | const epsilon = 1e-7; //arbitrary small value |
af9c9be3 BA |
1466 | let shifts = [0]; |
1467 | if (this.options["cylinder"]) | |
1468 | Array.prototype.push.apply(shifts, [-this.size.y, this.size.y]); | |
1469 | for (let sh of shifts) { | |
1470 | const rx = (x2 - x1) / step[0], | |
1471 | ry = (y2 + sh - y1) / step[1]; | |
1472 | if ( | |
6b9320bb | 1473 | // Zero step but non-zero interval => impossible |
af9c9be3 | 1474 | (!Number.isFinite(rx) && !Number.isNaN(rx)) || |
6b9320bb BA |
1475 | (!Number.isFinite(ry) && !Number.isNaN(ry)) || |
1476 | // Negative number of step (impossible) | |
1477 | (rx < 0 || ry < 0) || | |
1478 | // Not the same number of steps in both directions: | |
1479 | (!Number.isNaN(rx) && !Number.isNaN(ry) && Math.abs(rx - ry) > epsilon) | |
af9c9be3 BA |
1480 | ) { |
1481 | continue; | |
1482 | } | |
1483 | let distance = (Number.isNaN(rx) ? ry : rx); | |
6b9320bb | 1484 | if (Math.abs(distance - Math.round(distance)) > epsilon) |
af9c9be3 BA |
1485 | continue; |
1486 | distance = Math.round(distance); //in case of (numerical...) | |
6b9320bb | 1487 | if (!range || range >= distance) |
af9c9be3 BA |
1488 | return true; |
1489 | } | |
1490 | return false; | |
1491 | } | |
1492 | ||
1493 | //////////////////// | |
1494 | // MOVES GENERATION | |
1495 | ||
41534b92 BA |
1496 | getDropMovesFrom([c, p]) { |
1497 | // NOTE: by design, this.reserve[c][p] >= 1 on user click | |
1a7c0492 | 1498 | // (but not necessarily otherwise: atLeastOneMove() etc) |
b4ae3ff6 BA |
1499 | if (this.reserve[c][p] == 0) |
1500 | return []; | |
41534b92 BA |
1501 | let moves = []; |
1502 | for (let i=0; i<this.size.x; i++) { | |
1503 | for (let j=0; j<this.size.y; j++) { | |
9b760538 | 1504 | if (this.onBoard(i, j) && this.canDrop([c, p], [i, j])) { |
ca8a3993 BA |
1505 | let mv = new Move({ |
1506 | start: {x: c, y: p}, | |
1507 | end: {x: i, y: j}, | |
1508 | appear: [new PiPo({x: i, y: j, c: c, p: p})], | |
1509 | vanish: [] | |
1510 | }); | |
1511 | if (this.board[i][j] != "") { | |
1512 | mv.vanish.push(new PiPo({ | |
1513 | x: i, | |
1514 | y: j, | |
1515 | c: this.getColor(i, j), | |
1516 | p: this.getPiece(i, j) | |
1517 | })); | |
1518 | } | |
1519 | moves.push(mv); | |
41534b92 BA |
1520 | } |
1521 | } | |
1522 | } | |
1523 | return moves; | |
1524 | } | |
1525 | ||
1526 | // All possible moves from selected square | |
ca8a3993 | 1527 | getPotentialMovesFrom([x, y], color) { |
8b301184 BA |
1528 | if (this.subTurnTeleport == 2) |
1529 | return []; | |
ca8a3993 BA |
1530 | if (typeof x == "string") |
1531 | return this.getDropMovesFrom([x, y]); | |
1532 | if (this.isImmobilized([x, y])) | |
b4ae3ff6 | 1533 | return []; |
ca8a3993 BA |
1534 | const piece = this.getPieceType(x, y); |
1535 | let moves = this.getPotentialMovesOf(piece, [x, y]); | |
1536 | if (piece == "p" && this.hasEnpassant && this.epSquare) | |
1537 | Array.prototype.push.apply(moves, this.getEnpassantCaptures([x, y])); | |
41534b92 | 1538 | if ( |
a548cb4e | 1539 | this.isKing(0, 0, piece) && this.hasCastle && |
41534b92 BA |
1540 | this.castleFlags[color || this.turn].some(v => v < this.size.y) |
1541 | ) { | |
ca8a3993 | 1542 | Array.prototype.push.apply(moves, this.getCastleMoves([x, y])); |
41534b92 BA |
1543 | } |
1544 | return this.postProcessPotentialMoves(moves); | |
1545 | } | |
1546 | ||
1547 | postProcessPotentialMoves(moves) { | |
b4ae3ff6 BA |
1548 | if (moves.length == 0) |
1549 | return []; | |
41534b92 | 1550 | const color = this.getColor(moves[0].start.x, moves[0].start.y); |
cc2c7183 | 1551 | const oppCol = C.GetOppCol(color); |
41534b92 | 1552 | |
6b9320bb | 1553 | if (this.options["capture"] && this.atLeastOneCapture(color)) |
57b8015b | 1554 | moves = this.capturePostProcess(moves, oppCol); |
41534b92 | 1555 | |
57b8015b | 1556 | if (this.options["atomic"]) |
98d14451 | 1557 | moves = this.atomicPostProcess(moves, color, oppCol); |
cc2c7183 | 1558 | |
c9ab0340 BA |
1559 | if ( |
1560 | moves.length > 0 && | |
1561 | this.getPieceType(moves[0].start.x, moves[0].start.y) == "p" | |
1562 | ) { | |
98d14451 | 1563 | moves = this.pawnPostProcess(moves, color, oppCol); |
c9ab0340 BA |
1564 | } |
1565 | ||
6b9320bb | 1566 | if (this.options["cannibal"] && this.options["rifle"]) |
cc2c7183 | 1567 | // In this case a rifle-capture from last rank may promote a pawn |
98d14451 | 1568 | moves = this.riflePromotePostProcess(moves, color); |
57b8015b BA |
1569 | |
1570 | return moves; | |
1571 | } | |
1572 | ||
1573 | capturePostProcess(moves, oppCol) { | |
1574 | // Filter out non-capturing moves (not using m.vanish because of | |
1575 | // self captures of Recycle and Teleport). | |
1576 | return moves.filter(m => { | |
1577 | return ( | |
1578 | this.board[m.end.x][m.end.y] != "" && | |
1579 | this.getColor(m.end.x, m.end.y) == oppCol | |
1580 | ); | |
1581 | }); | |
1582 | } | |
1583 | ||
e7d409fc | 1584 | atomicPostProcess(moves, color, oppCol) { |
57b8015b BA |
1585 | moves.forEach(m => { |
1586 | if ( | |
1587 | this.board[m.end.x][m.end.y] != "" && | |
1588 | this.getColor(m.end.x, m.end.y) == oppCol | |
1589 | ) { | |
1590 | // Explosion! | |
1591 | let steps = [ | |
1592 | [-1, -1], | |
1593 | [-1, 0], | |
1594 | [-1, 1], | |
1595 | [0, -1], | |
1596 | [0, 1], | |
1597 | [1, -1], | |
1598 | [1, 0], | |
1599 | [1, 1] | |
1600 | ]; | |
e7d409fc BA |
1601 | let mNext = new Move({ |
1602 | start: m.end, | |
1603 | end: m.end, | |
1604 | appear: [], | |
1605 | vanish: [] | |
1606 | }); | |
57b8015b BA |
1607 | for (let step of steps) { |
1608 | let x = m.end.x + step[0]; | |
d262cff4 | 1609 | let y = this.getY(m.end.y + step[1]); |
57b8015b BA |
1610 | if ( |
1611 | this.onBoard(x, y) && | |
1612 | this.board[x][y] != "" && | |
e7d409fc | 1613 | (x != m.start.x || y != m.start.y) && |
57b8015b BA |
1614 | this.getPieceType(x, y) != "p" |
1615 | ) { | |
e7d409fc | 1616 | mNext.vanish.push( |
57b8015b BA |
1617 | new PiPo({ |
1618 | p: this.getPiece(x, y), | |
1619 | c: this.getColor(x, y), | |
1620 | x: x, | |
1621 | y: y | |
1622 | }) | |
1623 | ); | |
1624 | } | |
1625 | } | |
e7d409fc BA |
1626 | if (!this.options["rifle"]) { |
1627 | // The moving piece also vanish | |
1628 | mNext.vanish.unshift( | |
1629 | new PiPo({ | |
1630 | x: m.end.x, | |
1631 | y: m.end.y, | |
1632 | c: color, | |
1633 | p: this.getPiece(m.start.x, m.start.y) | |
1634 | }) | |
1635 | ); | |
1636 | } | |
1637 | m.next = mNext; | |
57b8015b BA |
1638 | } |
1639 | }); | |
98d14451 | 1640 | return moves; |
57b8015b BA |
1641 | } |
1642 | ||
1643 | pawnPostProcess(moves, color, oppCol) { | |
1644 | let moreMoves = []; | |
1645 | const lastRank = (color == "w" ? 0 : this.size.x - 1); | |
1646 | const initPiece = this.getPiece(moves[0].start.x, moves[0].start.y); | |
1647 | moves.forEach(m => { | |
57b8015b BA |
1648 | const [x1, y1] = [m.start.x, m.start.y]; |
1649 | const [x2, y2] = [m.end.x, m.end.y]; | |
1650 | const promotionOk = ( | |
1651 | x2 == lastRank && | |
1652 | (!this.options["rifle"] || this.board[x2][y2] == "") | |
1653 | ); | |
1654 | if (!promotionOk) | |
1655 | return; //nothing to do | |
8cc2f6d0 BA |
1656 | if (this.options["pawnfall"]) { |
1657 | m.appear.shift(); | |
8cc2f6d0 BA |
1658 | return; |
1659 | } | |
9ac67217 | 1660 | let finalPieces; |
99ea2453 BA |
1661 | if ( |
1662 | this.options["cannibal"] && | |
1663 | this.board[x2][y2] != "" && | |
1664 | this.getColor(x2, y2) == oppCol | |
1665 | ) { | |
1666 | finalPieces = [this.getPieceType(x2, y2)]; | |
1667 | } | |
1668 | else | |
1669 | finalPieces = this.pawnPromotions; | |
57b8015b BA |
1670 | m.appear[0].p = finalPieces[0]; |
1671 | if (initPiece == "!") //cannibal king-pawn | |
1672 | m.appear[0].p = C.CannibalKingCode[finalPieces[0]]; | |
1673 | for (let i=1; i<finalPieces.length; i++) { | |
9ac67217 | 1674 | let newMove = JSON.parse(JSON.stringify(m)); |
57b8015b | 1675 | const piece = finalPieces[i]; |
9ac67217 | 1676 | m.appear[0].p = (initPiece != "!" ? piece : C.CannibalKingCode[piece]); |
57b8015b BA |
1677 | moreMoves.push(newMove); |
1678 | } | |
1679 | }); | |
98d14451 | 1680 | return moves.concat(moreMoves); |
57b8015b | 1681 | } |
cc2c7183 | 1682 | |
9db5050a | 1683 | riflePromotePostProcess(moves, color) { |
57b8015b BA |
1684 | const lastRank = (color == "w" ? 0 : this.size.x - 1); |
1685 | let newMoves = []; | |
1686 | moves.forEach(m => { | |
1687 | if ( | |
1688 | m.start.x == lastRank && | |
1689 | m.appear.length >= 1 && | |
1690 | m.appear[0].p == "p" && | |
1691 | m.appear[0].x == m.start.x && | |
1692 | m.appear[0].y == m.start.y | |
1693 | ) { | |
57b8015b BA |
1694 | m.appear[0].p = this.pawnPromotions[0]; |
1695 | for (let i=1; i<this.pawnPromotions.length; i++) { | |
1696 | let newMv = JSON.parse(JSON.stringify(m)); | |
1697 | newMv.appear[0].p = this.pawnSpecs.promotions[i]; | |
1698 | newMoves.push(newMv); | |
1699 | } | |
1700 | } | |
1701 | }); | |
98d14451 | 1702 | return moves.concat(newMoves); |
41534b92 BA |
1703 | } |
1704 | ||
af9c9be3 | 1705 | // Generic method to find possible moves of "sliding or jumping" pieces |
6b9320bb | 1706 | getPotentialMovesOf(piece, [x, y]) { |
41534b92 | 1707 | const color = this.getColor(x, y); |
6b9320bb | 1708 | const stepSpec = this.getStepSpec(color, x, y, piece); |
af9c9be3 | 1709 | let squares = []; |
6b9320bb | 1710 | if (stepSpec.attack) { |
af9c9be3 BA |
1711 | squares = this.findDestSquares( |
1712 | [x, y], | |
1713 | { | |
1714 | attackOnly: true, | |
6b9320bb BA |
1715 | segments: this.options["cylinder"], |
1716 | stepSpec: stepSpec | |
af9c9be3 | 1717 | }, |
6b9320bb | 1718 | ([i1, j1], [i2, j2]) => { |
af9c9be3 | 1719 | return ( |
6b9320bb BA |
1720 | (!this.options["zen"] || this.isKing(i2, j2)) && |
1721 | this.canTake([i1, j1], [i2, j2]) | |
af9c9be3 | 1722 | ); |
c9ab0340 | 1723 | } |
af9c9be3 BA |
1724 | ); |
1725 | } | |
1726 | const noSpecials = this.findDestSquares( | |
1727 | [x, y], | |
1728 | { | |
6b9320bb BA |
1729 | moveOnly: !!stepSpec.attack || this.options["zen"], |
1730 | segments: this.options["cylinder"], | |
1731 | stepSpec: stepSpec | |
1732 | } | |
af9c9be3 BA |
1733 | ); |
1734 | Array.prototype.push.apply(squares, noSpecials); | |
1735 | if (this.options["zen"]) { | |
1736 | let zenCaptures = this.findCapturesOn( | |
1737 | [x, y], | |
6b9320bb BA |
1738 | {}, //byCol: default is ok |
1739 | ([i1, j1], [i2, j2]) => | |
1740 | !this.isKing(i1, j1) && this.canTake([i2, j2], [i1, j1]) | |
af9c9be3 BA |
1741 | ); |
1742 | // Technical step: segments (if any) are reversed | |
1743 | if (this.options["cylinder"]) { | |
1744 | zenCaptures.forEach(z => { | |
ca8a3993 | 1745 | z.segments = z.segments.reverse().map(s => s.reverse()) |
af9c9be3 | 1746 | }); |
41534b92 | 1747 | } |
af9c9be3 | 1748 | Array.prototype.push.apply(squares, zenCaptures); |
41534b92 | 1749 | } |
af9c9be3 BA |
1750 | if ( |
1751 | this.options["recycle"] || | |
1752 | (this.options["teleport"] && this.subTurnTeleport == 1) | |
1753 | ) { | |
1754 | const selfCaptures = this.findDestSquares( | |
1755 | [x, y], | |
1756 | { | |
1757 | attackOnly: true, | |
6b9320bb BA |
1758 | segments: this.options["cylinder"], |
1759 | stepSpec: stepSpec | |
af9c9be3 | 1760 | }, |
6b9320bb BA |
1761 | ([i1, j1], [i2, j2]) => |
1762 | this.getColor(i2, j2) == color && !this.isKing(i2, j2) | |
af9c9be3 BA |
1763 | ); |
1764 | Array.prototype.push.apply(squares, selfCaptures); | |
1765 | } | |
1766 | return squares.map(s => { | |
1767 | let mv = this.getBasicMove([x, y], s.sq); | |
1768 | if (this.options["cylinder"] && s.segments.length >= 2) | |
1769 | mv.segments = s.segments; | |
1770 | return mv; | |
1771 | }); | |
3b641716 BA |
1772 | } |
1773 | ||
af9c9be3 BA |
1774 | findDestSquares([x, y], o, allowed) { |
1775 | if (!allowed) | |
6b9320bb | 1776 | allowed = (sq1, sq2) => this.canTake(sq1, sq2); |
65cf1690 | 1777 | const apparentPiece = this.getPiece(x, y); //how it looks |
af9c9be3 BA |
1778 | let res = []; |
1779 | // Next 3 for Cylinder mode: (unused if !o.segments) | |
adf7c659 BA |
1780 | let explored = {}; |
1781 | let segments = []; | |
1782 | let segStart = []; | |
af9c9be3 BA |
1783 | const addSquare = ([i, j]) => { |
1784 | let elt = {sq: [i, j]}; | |
1785 | if (o.segments) | |
1786 | elt.segments = this.getSegments(segments, segStart, end); | |
1787 | res.push(elt); | |
adf7c659 | 1788 | }; |
33b42748 | 1789 | const exploreSteps = (stepArray, mode) => { |
c9ab0340 BA |
1790 | for (let s of stepArray) { |
1791 | outerLoop: for (let step of s.steps) { | |
af9c9be3 BA |
1792 | if (o.segments) { |
1793 | segments = []; | |
1794 | segStart = [x, y]; | |
1795 | } | |
d262cff4 BA |
1796 | let [i, j] = [x, y]; |
1797 | let stepCounter = 0; | |
1798 | while ( | |
1799 | this.onBoard(i, j) && | |
65cf1690 | 1800 | ((i == x && j == y) || this.canStepOver(i, j, apparentPiece)) |
d262cff4 | 1801 | ) { |
6b9320bb | 1802 | if (!explored[i + "." + j] && (i != x || j != y)) { |
c9ab0340 | 1803 | explored[i + "." + j] = true; |
af9c9be3 | 1804 | if ( |
6b9320bb BA |
1805 | !o.captureTarget || |
1806 | (o.captureTarget[0] == i && o.captureTarget[1] == j) | |
af9c9be3 | 1807 | ) { |
33b42748 | 1808 | if (o.one && mode != "attack") |
af9c9be3 | 1809 | return true; |
33b42748 | 1810 | if (mode != "attack") |
af9c9be3 BA |
1811 | addSquare(!o.captureTarget ? [i, j] : [x, y]); |
1812 | if (o.captureTarget) | |
1813 | return res[0]; | |
1814 | } | |
c9ab0340 BA |
1815 | } |
1816 | if (s.range <= stepCounter++) | |
1817 | continue outerLoop; | |
d262cff4 | 1818 | const oldIJ = [i, j]; |
c9ab0340 | 1819 | i += step[0]; |
adf7c659 | 1820 | j = this.getY(j + step[1]); |
af9c9be3 | 1821 | if (o.segments && Math.abs(j - oldIJ[1]) > 1) { |
d262cff4 | 1822 | // Boundary between segments (cylinder mode) |
adf7c659 BA |
1823 | segments.push([[segStart[0], segStart[1]], oldIJ]); |
1824 | segStart = [i, j]; | |
d262cff4 | 1825 | } |
c9ab0340 BA |
1826 | } |
1827 | if (!this.onBoard(i, j)) | |
1828 | continue; | |
1829 | const pieceIJ = this.getPieceType(i, j); | |
af9c9be3 | 1830 | if (!explored[i + "." + j]) { |
c9ab0340 | 1831 | explored[i + "." + j] = true; |
6b9320bb | 1832 | if (allowed([x, y], [i, j])) { |
33b42748 | 1833 | if (o.one && mode != "moves") |
af9c9be3 | 1834 | return true; |
33b42748 | 1835 | if (mode != "moves") |
af9c9be3 BA |
1836 | addSquare(!o.captureTarget ? [i, j] : [x, y]); |
1837 | if ( | |
1838 | o.captureTarget && | |
1839 | o.captureTarget[0] == i && o.captureTarget[1] == j | |
1840 | ) { | |
1841 | return res[0]; | |
1842 | } | |
1843 | } | |
c9ab0340 BA |
1844 | } |
1845 | } | |
41534b92 | 1846 | } |
6b9320bb | 1847 | return undefined; //default, but let's explicit it |
c9ab0340 | 1848 | }; |
af9c9be3 | 1849 | if (o.captureTarget) |
33b42748 | 1850 | return exploreSteps(o.captureSteps, "attack"); |
af9c9be3 | 1851 | else { |
6b9320bb BA |
1852 | const stepSpec = |
1853 | o.stepSpec || this.getStepSpec(this.getColor(x, y), x, y); | |
1854 | let outOne = false; | |
33b42748 BA |
1855 | if (!o.attackOnly) |
1856 | outOne = exploreSteps(stepSpec.both.concat(stepSpec.moves), "moves"); | |
1857 | if (!outOne && !o.moveOnly) | |
1858 | outOne = exploreSteps(stepSpec.both.concat(stepSpec.attack), "attack"); | |
6b9320bb | 1859 | return (o.one ? outOne : res); |
082e639a | 1860 | } |
41534b92 BA |
1861 | } |
1862 | ||
082e639a | 1863 | // Search for enemy (or not) pieces attacking [x, y] |
af9c9be3 | 1864 | findCapturesOn([x, y], o, allowed) { |
af9c9be3 BA |
1865 | if (!o.byCol) |
1866 | o.byCol = [C.GetOppCol(this.getColor(x, y) || this.turn)]; | |
ca8a3993 | 1867 | let res = []; |
c9ab0340 BA |
1868 | for (let i=0; i<this.size.x; i++) { |
1869 | for (let j=0; j<this.size.y; j++) { | |
af9c9be3 | 1870 | const colIJ = this.getColor(i, j); |
57b8015b BA |
1871 | if ( |
1872 | this.board[i][j] != "" && | |
af9c9be3 | 1873 | o.byCol.includes(colIJ) && |
57b8015b BA |
1874 | !this.isImmobilized([i, j]) |
1875 | ) { | |
65cf1690 BA |
1876 | const apparentPiece = this.getPiece(i, j); |
1877 | // Quick check: does this potential attacker target x,y ? | |
1878 | if (this.canStepOver(x, y, apparentPiece)) | |
1879 | continue; | |
af9c9be3 | 1880 | const stepSpec = this.getStepSpec(colIJ, i, j); |
33b42748 | 1881 | const attacks = stepSpec.attack.concat(stepSpec.both); |
c9ab0340 BA |
1882 | for (let a of attacks) { |
1883 | for (let s of a.steps) { | |
1884 | // Quick check: if step isn't compatible, don't even try | |
af9c9be3 | 1885 | if (!this.compatibleStep([i, j], [x, y], s, a.range)) |
c9ab0340 BA |
1886 | continue; |
1887 | // Finally verify that nothing stand in-between | |
6b9320bb | 1888 | const out = this.findDestSquares( |
af9c9be3 BA |
1889 | [i, j], |
1890 | { | |
1891 | captureTarget: [x, y], | |
1892 | captureSteps: [{steps: [s], range: a.range}], | |
6b9320bb BA |
1893 | segments: o.segments, |
1894 | attackOnly: true, | |
1895 | one: false //one and captureTarget are mutually exclusive | |
af9c9be3 | 1896 | }, |
6b9320bb | 1897 | allowed |
af9c9be3 | 1898 | ); |
6b9320bb | 1899 | if (out) { |
af9c9be3 BA |
1900 | if (o.one) |
1901 | return true; | |
6b9320bb | 1902 | res.push(out); |
c9ab0340 BA |
1903 | } |
1904 | } | |
1905 | } | |
41534b92 | 1906 | } |
c9ab0340 BA |
1907 | } |
1908 | } | |
6b9320bb | 1909 | return (o.one ? false : res); |
57b8015b BA |
1910 | } |
1911 | ||
41534b92 BA |
1912 | // Build a regular move from its initial and destination squares. |
1913 | // tr: transformation | |
1914 | getBasicMove([sx, sy], [ex, ey], tr) { | |
1915 | const initColor = this.getColor(sx, sy); | |
cc2c7183 | 1916 | const initPiece = this.getPiece(sx, sy); |
41534b92 BA |
1917 | const destColor = (this.board[ex][ey] != "" ? this.getColor(ex, ey) : ""); |
1918 | let mv = new Move({ | |
1919 | appear: [], | |
1920 | vanish: [], | |
15106e82 BA |
1921 | start: {x: sx, y: sy}, |
1922 | end: {x: ex, y: ey} | |
41534b92 BA |
1923 | }); |
1924 | if ( | |
1925 | !this.options["rifle"] || | |
1926 | this.board[ex][ey] == "" || | |
1927 | destColor == initColor //Recycle, Teleport | |
1928 | ) { | |
1929 | mv.appear = [ | |
1930 | new PiPo({ | |
1931 | x: ex, | |
1932 | y: ey, | |
1933 | c: !!tr ? tr.c : initColor, | |
1934 | p: !!tr ? tr.p : initPiece | |
1935 | }) | |
1936 | ]; | |
1937 | mv.vanish = [ | |
1938 | new PiPo({ | |
1939 | x: sx, | |
1940 | y: sy, | |
1941 | c: initColor, | |
1942 | p: initPiece | |
1943 | }) | |
1944 | ]; | |
1945 | } | |
1946 | if (this.board[ex][ey] != "") { | |
1947 | mv.vanish.push( | |
1948 | new PiPo({ | |
1949 | x: ex, | |
1950 | y: ey, | |
1951 | c: this.getColor(ex, ey), | |
cc2c7183 | 1952 | p: this.getPiece(ex, ey) |
41534b92 BA |
1953 | }) |
1954 | ); | |
41534b92 | 1955 | if (this.options["cannibal"] && destColor != initColor) { |
6b9320bb | 1956 | const lastIdx = mv.vanish.length - 1; //think "Rifle+Cannibal" |
cc2c7183 | 1957 | let trPiece = mv.vanish[lastIdx].p; |
6b9320bb | 1958 | if (this.isKing(sx, sy)) |
cc2c7183 | 1959 | trPiece = C.CannibalKingCode[trPiece]; |
b4ae3ff6 BA |
1960 | if (mv.appear.length >= 1) |
1961 | mv.appear[0].p = trPiece; | |
41534b92 BA |
1962 | else if (this.options["rifle"]) { |
1963 | mv.appear.unshift( | |
1964 | new PiPo({ | |
1965 | x: sx, | |
1966 | y: sy, | |
1967 | c: initColor, | |
cc2c7183 | 1968 | p: trPiece |
41534b92 BA |
1969 | }) |
1970 | ); | |
1971 | mv.vanish.unshift( | |
1972 | new PiPo({ | |
1973 | x: sx, | |
1974 | y: sy, | |
1975 | c: initColor, | |
1976 | p: initPiece | |
1977 | }) | |
1978 | ); | |
1979 | } | |
1980 | } | |
1981 | } | |
1982 | return mv; | |
1983 | } | |
1984 | ||
1985 | // En-passant square, if any | |
1986 | getEpSquare(moveOrSquare) { | |
1987 | if (typeof moveOrSquare === "string") { | |
1988 | const square = moveOrSquare; | |
b4ae3ff6 BA |
1989 | if (square == "-") |
1990 | return undefined; | |
cc2c7183 | 1991 | return C.SquareToCoords(square); |
41534b92 BA |
1992 | } |
1993 | // Argument is a move: | |
1994 | const move = moveOrSquare; | |
1995 | const s = move.start, | |
1996 | e = move.end; | |
1997 | if ( | |
1998 | s.y == e.y && | |
1999 | Math.abs(s.x - e.x) == 2 && | |
2000 | // Next conditions for variants like Atomic or Rifle, Recycle... | |
65cf1690 BA |
2001 | ( |
2002 | move.appear.length > 0 && | |
ca8a3993 | 2003 | this.getPieceType(0, 0, move.appear[0].p) == 'p' |
65cf1690 BA |
2004 | ) |
2005 | && | |
2006 | ( | |
2007 | move.vanish.length > 0 && | |
ca8a3993 | 2008 | this.getPieceType(0, 0, move.vanish[0].p) == 'p' |
65cf1690 | 2009 | ) |
41534b92 BA |
2010 | ) { |
2011 | return { | |
2012 | x: (s.x + e.x) / 2, | |
2013 | y: s.y | |
2014 | }; | |
2015 | } | |
2016 | return undefined; //default | |
2017 | } | |
2018 | ||
2019 | // Special case of en-passant captures: treated separately | |
c9ab0340 | 2020 | getEnpassantCaptures([x, y]) { |
41534b92 | 2021 | const color = this.getColor(x, y); |
c9ab0340 | 2022 | const shiftX = (color == 'w' ? -1 : 1); |
cc2c7183 | 2023 | const oppCol = C.GetOppCol(color); |
41534b92 | 2024 | if ( |
ca8a3993 | 2025 | this.epSquare && |
41534b92 | 2026 | this.epSquare.x == x + shiftX && |
d262cff4 | 2027 | Math.abs(this.getY(this.epSquare.y - y)) == 1 && |
ca8a3993 BA |
2028 | // Doublemove (and Progressive?) guards: |
2029 | this.board[this.epSquare.x][this.epSquare.y] == "" && | |
2030 | this.getColor(x, this.epSquare.y) == oppCol | |
41534b92 BA |
2031 | ) { |
2032 | const [epx, epy] = [this.epSquare.x, this.epSquare.y]; | |
ca8a3993 BA |
2033 | this.board[epx][epy] = oppCol + 'p'; |
2034 | let enpassantMove = this.getBasicMove([x, y], [epx, epy]); | |
41534b92 BA |
2035 | this.board[epx][epy] = ""; |
2036 | const lastIdx = enpassantMove.vanish.length - 1; //think Rifle | |
2037 | enpassantMove.vanish[lastIdx].x = x; | |
ca8a3993 | 2038 | return [enpassantMove]; |
41534b92 | 2039 | } |
ca8a3993 | 2040 | return []; |
41534b92 BA |
2041 | } |
2042 | ||
ca8a3993 | 2043 | getCastleMoves([x, y], finalSquares, castleWith) { |
41534b92 BA |
2044 | const c = this.getColor(x, y); |
2045 | ||
2046 | // Castling ? | |
cc2c7183 | 2047 | const oppCol = C.GetOppCol(c); |
41534b92 BA |
2048 | let moves = []; |
2049 | // King, then rook: | |
2050 | finalSquares = | |
2051 | finalSquares || [ [2, 3], [this.size.y - 2, this.size.y - 3] ]; | |
cc2c7183 | 2052 | const castlingKing = this.getPiece(x, y); |
41534b92 BA |
2053 | castlingCheck: for ( |
2054 | let castleSide = 0; | |
2055 | castleSide < 2; | |
2056 | castleSide++ //large, then small | |
2057 | ) { | |
b4ae3ff6 BA |
2058 | if (this.castleFlags[c][castleSide] >= this.size.y) |
2059 | continue; | |
41534b92 BA |
2060 | // If this code is reached, rook and king are on initial position |
2061 | ||
2062 | // NOTE: in some variants this is not a rook | |
2063 | const rookPos = this.castleFlags[c][castleSide]; | |
cc2c7183 | 2064 | const castlingPiece = this.getPiece(x, rookPos); |
41534b92 BA |
2065 | if ( |
2066 | this.board[x][rookPos] == "" || | |
2067 | this.getColor(x, rookPos) != c || | |
ca8a3993 | 2068 | (castleWith && !castleWith.includes(castlingPiece)) |
41534b92 BA |
2069 | ) { |
2070 | // Rook is not here, or changed color (see Benedict) | |
2071 | continue; | |
2072 | } | |
2073 | // Nothing on the path of the king ? (and no checks) | |
2074 | const finDist = finalSquares[castleSide][0] - y; | |
2075 | let step = finDist / Math.max(1, Math.abs(finDist)); | |
2076 | let i = y; | |
2077 | do { | |
2078 | if ( | |
ca8a3993 BA |
2079 | // NOTE: next weird test because underCheck() verification |
2080 | // will be executed in filterValid() later. | |
2081 | ( | |
2082 | i != finalSquares[castleSide][0] && | |
9aebe2aa | 2083 | this.underCheck([[x, i]], oppCol) |
ca8a3993 BA |
2084 | ) |
2085 | || | |
41534b92 BA |
2086 | ( |
2087 | this.board[x][i] != "" && | |
2088 | // NOTE: next check is enough, because of chessboard constraints | |
2089 | (this.getColor(x, i) != c || ![rookPos, y].includes(i)) | |
2090 | ) | |
2091 | ) { | |
2092 | continue castlingCheck; | |
2093 | } | |
2094 | i += step; | |
2095 | } while (i != finalSquares[castleSide][0]); | |
2096 | // Nothing on the path to the rook? | |
2097 | step = (castleSide == 0 ? -1 : 1); | |
2098 | for (i = y + step; i != rookPos; i += step) { | |
b4ae3ff6 BA |
2099 | if (this.board[x][i] != "") |
2100 | continue castlingCheck; | |
41534b92 BA |
2101 | } |
2102 | ||
2103 | // Nothing on final squares, except maybe king and castling rook? | |
2104 | for (i = 0; i < 2; i++) { | |
2105 | if ( | |
2106 | finalSquares[castleSide][i] != rookPos && | |
2107 | this.board[x][finalSquares[castleSide][i]] != "" && | |
2108 | ( | |
2109 | finalSquares[castleSide][i] != y || | |
2110 | this.getColor(x, finalSquares[castleSide][i]) != c | |
2111 | ) | |
2112 | ) { | |
2113 | continue castlingCheck; | |
2114 | } | |
2115 | } | |
2116 | ||
ca8a3993 | 2117 | // If this code is reached, castle is potentially valid |
41534b92 BA |
2118 | moves.push( |
2119 | new Move({ | |
2120 | appear: [ | |
2121 | new PiPo({ | |
2122 | x: x, | |
2123 | y: finalSquares[castleSide][0], | |
2124 | p: castlingKing, | |
2125 | c: c | |
2126 | }), | |
2127 | new PiPo({ | |
2128 | x: x, | |
2129 | y: finalSquares[castleSide][1], | |
2130 | p: castlingPiece, | |
2131 | c: c | |
2132 | }) | |
2133 | ], | |
2134 | vanish: [ | |
2135 | // King might be initially disguised (Titan...) | |
2136 | new PiPo({ x: x, y: y, p: castlingKing, c: c }), | |
2137 | new PiPo({ x: x, y: rookPos, p: castlingPiece, c: c }) | |
2138 | ], | |
2139 | end: | |
2140 | Math.abs(y - rookPos) <= 2 | |
c9ab0340 BA |
2141 | ? {x: x, y: rookPos} |
2142 | : {x: x, y: y + 2 * (castleSide == 0 ? -1 : 1)} | |
41534b92 BA |
2143 | }) |
2144 | ); | |
2145 | } | |
2146 | ||
2147 | return moves; | |
2148 | } | |
2149 | ||
2150 | //////////////////// | |
2151 | // MOVES VALIDATION | |
2152 | ||
af9c9be3 BA |
2153 | // Is piece (or square) at given position attacked by "oppCol" ? |
2154 | underAttack([x, y], oppCol) { | |
6b9320bb BA |
2155 | // An empty square is considered as king, |
2156 | // since it's used only in getCastleMoves (TODO?) | |
2157 | const king = this.board[x][y] == "" || this.isKing(x, y); | |
af9c9be3 BA |
2158 | return ( |
2159 | ( | |
2160 | (!this.options["zen"] || king) && | |
6b9320bb BA |
2161 | this.findCapturesOn( |
2162 | [x, y], | |
2163 | { | |
2164 | byCol: [oppCol], | |
2165 | segments: this.options["cylinder"], | |
2166 | one: true | |
2167 | } | |
2168 | ) | |
af9c9be3 BA |
2169 | ) |
2170 | || | |
2171 | ( | |
6b9320bb BA |
2172 | (!!this.options["zen"] && !king) && |
2173 | this.findDestSquares( | |
2174 | [x, y], | |
2175 | { | |
2176 | attackOnly: true, | |
2177 | segments: this.options["cylinder"], | |
2178 | one: true | |
2179 | }, | |
2180 | ([i1, j1], [i2, j2]) => this.getColor(i2, j2) == oppCol | |
2181 | ) | |
af9c9be3 BA |
2182 | ) |
2183 | ); | |
2184 | } | |
2185 | ||
f3e90e30 | 2186 | // Argument is (very generally) an array of squares (= arrays) |
a548cb4e | 2187 | underCheck(square_s, oppCol) { |
b4ae3ff6 BA |
2188 | if (this.options["taking"] || this.options["dark"]) |
2189 | return false; | |
a548cb4e | 2190 | return square_s.some(sq => this.underAttack(sq, oppCol)); |
41534b92 BA |
2191 | } |
2192 | ||
a548cb4e | 2193 | // Scan board for king(s) |
41534b92 | 2194 | searchKingPos(color) { |
a548cb4e | 2195 | let res = []; |
41534b92 BA |
2196 | for (let i=0; i < this.size.x; i++) { |
2197 | for (let j=0; j < this.size.y; j++) { | |
6b9320bb | 2198 | if (this.getColor(i, j) == color && this.isKing(i, j)) |
a548cb4e | 2199 | res.push([i, j]); |
41534b92 BA |
2200 | } |
2201 | } | |
a548cb4e | 2202 | return res; |
41534b92 BA |
2203 | } |
2204 | ||
af9c9be3 | 2205 | // 'color' arg because some variants (e.g. Refusal) check opponent moves |
f5435757 | 2206 | filterValid(moves, color) { |
f5435757 BA |
2207 | if (!color) |
2208 | color = this.turn; | |
cc2c7183 | 2209 | const oppCol = C.GetOppCol(color); |
a548cb4e | 2210 | let kingPos = this.searchKingPos(color); |
41534b92 BA |
2211 | let filtered = {}; //avoid re-checking similar moves (promotions...) |
2212 | return moves.filter(m => { | |
2213 | const key = m.start.x + m.start.y + '.' + m.end.x + m.end.y; | |
2214 | if (!filtered[key]) { | |
2215 | this.playOnBoard(m); | |
a548cb4e BA |
2216 | let newKingPP = null, |
2217 | sqIdx = 0, | |
41534b92 | 2218 | res = true; //a priori valid |
f3e90e30 BA |
2219 | const oldKingPP = |
2220 | m.vanish.find(v => this.isKing(0, 0, v.p) && v.c == color); | |
a548cb4e | 2221 | if (oldKingPP) { |
41534b92 | 2222 | // Search king in appear array: |
a548cb4e BA |
2223 | newKingPP = |
2224 | m.appear.find(a => this.isKing(0, 0, a.p) && a.c == color); | |
2225 | if (newKingPP) { | |
f3e90e30 BA |
2226 | sqIdx = kingPos.findIndex(kp => |
2227 | kp[0] == oldKingPP.x && kp[1] == oldKingPP.y); | |
a548cb4e BA |
2228 | kingPos[sqIdx] = [newKingPP.x, newKingPP.y]; |
2229 | } | |
b4ae3ff6 | 2230 | else |
a548cb4e | 2231 | res = false; //king vanished |
41534b92 | 2232 | } |
f3e90e30 | 2233 | res &&= !this.underCheck(kingPos, oppCol); |
a548cb4e BA |
2234 | if (oldKingPP && newKingPP) |
2235 | kingPos[sqIdx] = [oldKingPP.x, oldKingPP.y]; | |
41534b92 BA |
2236 | this.undoOnBoard(m); |
2237 | filtered[key] = res; | |
2238 | return res; | |
2239 | } | |
2240 | return filtered[key]; | |
2241 | }); | |
2242 | } | |
2243 | ||
2244 | ///////////////// | |
2245 | // MOVES PLAYING | |
2246 | ||
41534b92 BA |
2247 | // Apply a move on board |
2248 | playOnBoard(move) { | |
6997e386 BA |
2249 | for (let psq of move.vanish) |
2250 | this.board[psq.x][psq.y] = ""; | |
2251 | for (let psq of move.appear) | |
2252 | this.board[psq.x][psq.y] = psq.c + psq.p; | |
41534b92 BA |
2253 | } |
2254 | // Un-apply the played move | |
2255 | undoOnBoard(move) { | |
6997e386 BA |
2256 | for (let psq of move.appear) |
2257 | this.board[psq.x][psq.y] = ""; | |
2258 | for (let psq of move.vanish) | |
2259 | this.board[psq.x][psq.y] = psq.c + psq.p; | |
41534b92 BA |
2260 | } |
2261 | ||
2262 | updateCastleFlags(move) { | |
2263 | // Update castling flags if start or arrive from/at rook/king locations | |
2264 | move.appear.concat(move.vanish).forEach(psq => { | |
6b9320bb | 2265 | if (this.isKing(0, 0, psq.p)) |
41534b92 | 2266 | this.castleFlags[psq.c] = [this.size.y, this.size.y]; |
41534b92 | 2267 | // NOTE: not "else if" because king can capture enemy rook... |
cc2c7183 | 2268 | let c = ""; |
b4ae3ff6 BA |
2269 | if (psq.x == 0) |
2270 | c = "b"; | |
2271 | else if (psq.x == this.size.x - 1) | |
2272 | c = "w"; | |
cc2c7183 | 2273 | if (c != "") { |
41534b92 | 2274 | const fidx = this.castleFlags[c].findIndex(f => f == psq.y); |
b4ae3ff6 BA |
2275 | if (fidx >= 0) |
2276 | this.castleFlags[c][fidx] = this.size.y; | |
41534b92 BA |
2277 | } |
2278 | }); | |
2279 | } | |
2280 | ||
2281 | prePlay(move) { | |
2282 | if ( | |
99ea2453 BA |
2283 | this.hasCastle && |
2284 | // If flags already off, no need to re-check: | |
ca8a3993 BA |
2285 | Object.values(this.castleFlags).some(cvals => |
2286 | cvals.some(val => val < this.size.y)) | |
41534b92 | 2287 | ) { |
99ea2453 BA |
2288 | this.updateCastleFlags(move); |
2289 | } | |
2290 | if (this.options["crazyhouse"]) { | |
2291 | move.vanish.forEach(v => { | |
2292 | const square = C.CoordsToSquare({x: v.x, y: v.y}); | |
2293 | if (this.ispawn[square]) | |
2294 | delete this.ispawn[square]; | |
2295 | }); | |
2296 | if (move.appear.length > 0 && move.vanish.length > 0) { | |
2297 | // Assumption: something is moving | |
2298 | const initSquare = C.CoordsToSquare(move.start); | |
f429756d | 2299 | const destSquare = C.CoordsToSquare(move.end); |
99ea2453 BA |
2300 | if ( |
2301 | this.ispawn[initSquare] || | |
ca8a3993 | 2302 | (move.vanish[0].p == 'p' && move.appear[0].p != 'p') |
41534b92 | 2303 | ) { |
f429756d BA |
2304 | this.ispawn[destSquare] = true; |
2305 | } | |
2306 | else if ( | |
2307 | this.ispawn[destSquare] && | |
2308 | this.getColor(move.end.x, move.end.y) != move.vanish[0].c | |
2309 | ) { | |
ca8a3993 | 2310 | move.vanish[1].p = 'p'; |
f429756d | 2311 | delete this.ispawn[destSquare]; |
41534b92 BA |
2312 | } |
2313 | } | |
2314 | } | |
2315 | const minSize = Math.min(move.appear.length, move.vanish.length); | |
0c44c676 BA |
2316 | if ( |
2317 | this.hasReserve && | |
2318 | // Warning; atomic pawn removal isn't a capture | |
2319 | (!this.options["atomic"] || !this.rempawn || this.movesCount >= 1) | |
2320 | ) { | |
41534b92 BA |
2321 | const color = this.turn; |
2322 | for (let i=minSize; i<move.appear.length; i++) { | |
2323 | // Something appears = dropped on board (some exceptions, Chakart...) | |
0c44c676 BA |
2324 | if (move.appear[i].c == color) { |
2325 | const piece = move.appear[i].p; | |
2326 | this.updateReserve(color, piece, this.reserve[color][piece] - 1); | |
2327 | } | |
41534b92 BA |
2328 | } |
2329 | for (let i=minSize; i<move.vanish.length; i++) { | |
2330 | // Something vanish: add to reserve except if recycle & opponent | |
0c44c676 BA |
2331 | if ( |
2332 | this.options["crazyhouse"] || | |
2333 | (this.options["recycle"] && move.vanish[i].c == color) | |
2334 | ) { | |
2335 | const piece = move.vanish[i].p; | |
41534b92 | 2336 | this.updateReserve(color, piece, this.reserve[color][piece] + 1); |
0c44c676 | 2337 | } |
41534b92 BA |
2338 | } |
2339 | } | |
2340 | } | |
2341 | ||
2342 | play(move) { | |
2343 | this.prePlay(move); | |
b4ae3ff6 BA |
2344 | if (this.hasEnpassant) |
2345 | this.epSquare = this.getEpSquare(move); | |
41534b92 BA |
2346 | this.playOnBoard(move); |
2347 | this.postPlay(move); | |
2348 | } | |
2349 | ||
2350 | postPlay(move) { | |
b4ae3ff6 | 2351 | if (this.options["dark"]) |
c9ab0340 | 2352 | this.updateEnlightened(); |
41534b92 BA |
2353 | if (this.options["teleport"]) { |
2354 | if ( | |
cc2c7183 | 2355 | this.subTurnTeleport == 1 && |
41534b92 | 2356 | move.vanish.length > move.appear.length && |
518bfb7a | 2357 | move.vanish[1].c == this.turn |
41534b92 BA |
2358 | ) { |
2359 | const v = move.vanish[move.vanish.length - 1]; | |
2360 | this.captured = {x: v.x, y: v.y, c: v.c, p: v.p}; | |
cc2c7183 | 2361 | this.subTurnTeleport = 2; |
41534b92 BA |
2362 | return; |
2363 | } | |
cc2c7183 | 2364 | this.subTurnTeleport = 1; |
41534b92 BA |
2365 | this.captured = null; |
2366 | } | |
182ba661 BA |
2367 | this.tryChangeTurn(move); |
2368 | } | |
2369 | ||
2370 | tryChangeTurn(move) { | |
5f08c59b | 2371 | if (this.isLastMove(move)) { |
518bfb7a | 2372 | this.turn = C.GetOppCol(this.turn); |
5f08c59b BA |
2373 | this.movesCount++; |
2374 | this.subTurn = 1; | |
41534b92 | 2375 | } |
af9c9be3 BA |
2376 | else if (!move.next) |
2377 | this.subTurn++; | |
5f08c59b BA |
2378 | } |
2379 | ||
2380 | isLastMove(move) { | |
af9c9be3 BA |
2381 | if (move.next) |
2382 | return false; | |
2383 | const color = this.turn; | |
6b9320bb | 2384 | const oppKingPos = this.searchKingPos(C.GetOppCol(color)); |
a548cb4e | 2385 | if (oppKingPos.length == 0 || this.underCheck(oppKingPos, color)) |
af9c9be3 | 2386 | return true; |
5f08c59b | 2387 | return ( |
af9c9be3 BA |
2388 | ( |
2389 | !this.options["balance"] || | |
6b9320bb BA |
2390 | ![1, 2].includes(this.movesCount) || |
2391 | this.subTurn == 2 | |
af9c9be3 BA |
2392 | ) |
2393 | && | |
2394 | ( | |
2395 | !this.options["doublemove"] || | |
2396 | this.movesCount == 0 || | |
2397 | this.subTurn == 2 | |
2398 | ) | |
2399 | && | |
2400 | ( | |
2401 | !this.options["progressive"] || | |
2402 | this.subTurn == this.movesCount + 1 | |
2403 | ) | |
5f08c59b | 2404 | ); |
41534b92 BA |
2405 | } |
2406 | ||
2407 | // "Stop at the first move found" | |
2408 | atLeastOneMove(color) { | |
41534b92 BA |
2409 | for (let i = 0; i < this.size.x; i++) { |
2410 | for (let j = 0; j < this.size.y; j++) { | |
2411 | if (this.board[i][j] != "" && this.getColor(i, j) == color) { | |
cc2c7183 BA |
2412 | // NOTE: in fact searching for all potential moves from i,j. |
2413 | // I don't believe this is an issue, for now at least. | |
41534b92 | 2414 | const moves = this.getPotentialMovesFrom([i, j]); |
b4ae3ff6 BA |
2415 | if (moves.some(m => this.filterValid([m]).length >= 1)) |
2416 | return true; | |
41534b92 BA |
2417 | } |
2418 | } | |
2419 | } | |
2420 | if (this.hasReserve && this.reserve[color]) { | |
2421 | for (let p of Object.keys(this.reserve[color])) { | |
2422 | const moves = this.getDropMovesFrom([color, p]); | |
b4ae3ff6 BA |
2423 | if (moves.some(m => this.filterValid([m]).length >= 1)) |
2424 | return true; | |
41534b92 BA |
2425 | } |
2426 | } | |
2427 | return false; | |
2428 | } | |
2429 | ||
2430 | // What is the score ? (Interesting if game is over) | |
d6d0a46e BA |
2431 | getCurrentScore(move_s) { |
2432 | const move = move_s[move_s.length - 1]; | |
2433 | // Shortcut in case the score was computed before: | |
2434 | if (move.result) | |
2435 | return move.result; | |
41534b92 | 2436 | const color = this.turn; |
cc2c7183 | 2437 | const oppCol = C.GetOppCol(color); |
a548cb4e BA |
2438 | const kingPos = { |
2439 | [color]: this.searchKingPos(color), | |
2440 | [oppCol]: this.searchKingPos(oppCol) | |
2441 | }; | |
2442 | if (kingPos[color].length == 0 && kingPos[oppCol].length == 0) | |
b4ae3ff6 | 2443 | return "1/2"; |
a548cb4e | 2444 | if (kingPos[color].length == 0) |
b4ae3ff6 | 2445 | return (color == "w" ? "0-1" : "1-0"); |
a548cb4e | 2446 | if (kingPos[oppCol].length == 0) |
b4ae3ff6 | 2447 | return (color == "w" ? "1-0" : "0-1"); |
6b9320bb | 2448 | if (this.atLeastOneMove(color)) |
b4ae3ff6 | 2449 | return "*"; |
41534b92 | 2450 | // No valid move: stalemate or checkmate? |
a548cb4e | 2451 | if (!this.underCheck(kingPos[color], oppCol)) |
b4ae3ff6 | 2452 | return "1/2"; |
41534b92 BA |
2453 | // OK, checkmate |
2454 | return (color == "w" ? "0-1" : "1-0"); | |
2455 | } | |
2456 | ||
41534b92 BA |
2457 | playVisual(move, r) { |
2458 | move.vanish.forEach(v => { | |
f77da909 | 2459 | this.g_pieces[v.x][v.y].remove(); |
c9ab0340 | 2460 | this.g_pieces[v.x][v.y] = null; |
41534b92 | 2461 | }); |
3c61449b BA |
2462 | let chessboard = |
2463 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
b4ae3ff6 BA |
2464 | if (!r) |
2465 | r = chessboard.getBoundingClientRect(); | |
41534b92 BA |
2466 | const pieceWidth = this.getPieceWidth(r.width); |
2467 | move.appear.forEach(a => { | |
41534b92 | 2468 | this.g_pieces[a.x][a.y] = document.createElement("piece"); |
2159c239 BA |
2469 | C.AddClass_es(this.g_pieces[a.x][a.y], |
2470 | this.pieces(a.c, a.x, a.y)[a.p]["class"]); | |
bc2bc396 | 2471 | this.g_pieces[a.x][a.y].classList.add(C.GetColorClass(a.c)); |
41534b92 BA |
2472 | this.g_pieces[a.x][a.y].style.width = pieceWidth + "px"; |
2473 | this.g_pieces[a.x][a.y].style.height = pieceWidth + "px"; | |
2474 | const [ip, jp] = this.getPixelPosition(a.x, a.y, r); | |
9db5050a BA |
2475 | // Translate coordinates to use chessboard as reference: |
2476 | this.g_pieces[a.x][a.y].style.transform = | |
2477 | `translate(${ip - r.x}px,${jp - r.y}px)`; | |
c9ab0340 BA |
2478 | if (this.enlightened && !this.enlightened[a.x][a.y]) |
2479 | this.g_pieces[a.x][a.y].classList.add("hidden"); | |
3c61449b | 2480 | chessboard.appendChild(this.g_pieces[a.x][a.y]); |
41534b92 | 2481 | }); |
c9ab0340 BA |
2482 | if (this.options["dark"]) |
2483 | this.graphUpdateEnlightened(); | |
41534b92 BA |
2484 | } |
2485 | ||
5f08c59b | 2486 | // TODO: send stack receive stack, or allow incremental? (good/bad points) |
e7d409fc | 2487 | buildMoveStack(move, r) { |
5f08c59b BA |
2488 | this.moveStack.push(move); |
2489 | this.computeNextMove(move); | |
b9877ed2 BA |
2490 | const then = () => { |
2491 | const newTurn = this.turn; | |
2492 | if (this.moveStack.length == 1 && !this.hideMoves) | |
2493 | this.playVisual(move, r); | |
2494 | if (move.next) { | |
2495 | this.gameState = { | |
2496 | fen: this.getFen(), | |
2497 | board: JSON.parse(JSON.stringify(this.board)) //easier | |
2498 | }; | |
2499 | this.buildMoveStack(move.next, r); | |
5f08c59b BA |
2500 | } |
2501 | else { | |
b9877ed2 BA |
2502 | if (this.moveStack.length == 1) { |
2503 | // Usual case (one normal move) | |
2504 | this.afterPlay(this.moveStack, newTurn, {send: true, res: true}); | |
2505 | this.moveStack = []; | |
2506 | } | |
2507 | else { | |
2508 | this.afterPlay(this.moveStack, newTurn, {send: true, res: false}); | |
2509 | this.re_initFromFen(this.gameState.fen, this.gameState.board); | |
2510 | this.playReceivedMove(this.moveStack.slice(1), () => { | |
2511 | this.afterPlay(this.moveStack, newTurn, {send: false, res: true}); | |
2512 | this.moveStack = []; | |
2513 | }); | |
2514 | } | |
5f08c59b | 2515 | } |
b9877ed2 BA |
2516 | }; |
2517 | // If hiding moves, then they are revealed in play() with callback | |
2518 | this.play(move, this.hideMoves ? then : null); | |
2519 | if (!this.hideMoves) | |
2520 | then(); | |
41534b92 BA |
2521 | } |
2522 | ||
5f08c59b BA |
2523 | // Implemented in variants using (automatic) moveStack |
2524 | computeNextMove(move) {} | |
2525 | ||
5f08c59b BA |
2526 | animateMoving(start, end, drag, segments, cb) { |
2527 | let initPiece = this.getDomPiece(start.x, start.y); | |
2528 | // NOTE: cloning often not required, but light enough, and simpler | |
9db5050a BA |
2529 | let movingPiece = initPiece.cloneNode(); |
2530 | initPiece.style.opacity = "0"; | |
2531 | let container = | |
2532 | document.getElementById(this.containerId) | |
2533 | const r = container.querySelector(".chessboard").getBoundingClientRect(); | |
5f08c59b | 2534 | if (typeof start.x == "string") { |
082e639a BA |
2535 | // Need to bound width/height (was 100% for reserve pieces) |
2536 | const pieceWidth = this.getPieceWidth(r.width); | |
2537 | movingPiece.style.width = pieceWidth + "px"; | |
2538 | movingPiece.style.height = pieceWidth + "px"; | |
2539 | } | |
f55a0a67 | 2540 | const maxDist = this.getMaxDistance(r); |
5f08c59b BA |
2541 | const apparentColor = this.getColor(start.x, start.y); |
2542 | const pieces = this.pieces(apparentColor, start.x, start.y); | |
2543 | if (drag) { | |
2544 | const startCode = this.getPiece(start.x, start.y); | |
3b641716 | 2545 | C.RemoveClass_es(movingPiece, pieces[startCode]["class"]); |
5f08c59b BA |
2546 | C.AddClass_es(movingPiece, pieces[drag.p]["class"]); |
2547 | if (apparentColor != drag.c) { | |
15106e82 | 2548 | movingPiece.classList.remove(C.GetColorClass(apparentColor)); |
5f08c59b | 2549 | movingPiece.classList.add(C.GetColorClass(drag.c)); |
41534b92 | 2550 | } |
41534b92 | 2551 | } |
9db5050a | 2552 | container.appendChild(movingPiece); |
15106e82 | 2553 | const animateSegment = (index, cb) => { |
9db5050a | 2554 | // NOTE: move.drag could be generalized per-segment (usage?) |
5f08c59b BA |
2555 | const [i1, j1] = segments[index][0]; |
2556 | const [i2, j2] = segments[index][1]; | |
15106e82 BA |
2557 | const dep = this.getPixelPosition(i1, j1, r); |
2558 | const arr = this.getPixelPosition(i2, j2, r); | |
9db5050a BA |
2559 | movingPiece.style.transitionDuration = "0s"; |
2560 | movingPiece.style.transform = `translate(${dep[0]}px, ${dep[1]}px)`; | |
15106e82 BA |
2561 | const distance = |
2562 | Math.sqrt((arr[0] - dep[0]) ** 2 + (arr[1] - dep[1]) ** 2); | |
2563 | const duration = 0.2 + (distance / maxDist) * 0.3; | |
9db5050a BA |
2564 | // TODO: unclear why we need this new delay below: |
2565 | setTimeout(() => { | |
2566 | movingPiece.style.transitionDuration = duration + "s"; | |
adf7c659 | 2567 | // movingPiece is child of container: no need to adjust coordinates |
9db5050a BA |
2568 | movingPiece.style.transform = `translate(${arr[0]}px, ${arr[1]}px)`; |
2569 | setTimeout(cb, duration * 1000); | |
2570 | }, 50); | |
15106e82 | 2571 | }; |
15106e82 | 2572 | let index = 0; |
635418a5 | 2573 | const animateSegmentCallback = () => { |
5f08c59b | 2574 | if (index < segments.length) |
635418a5 | 2575 | animateSegment(index++, animateSegmentCallback); |
15106e82 | 2576 | else { |
9db5050a BA |
2577 | movingPiece.remove(); |
2578 | initPiece.style.opacity = "1"; | |
5f08c59b | 2579 | cb(); |
15106e82 | 2580 | } |
635418a5 BA |
2581 | }; |
2582 | animateSegmentCallback(); | |
41534b92 BA |
2583 | } |
2584 | ||
5f08c59b BA |
2585 | // Input array of objects with at least fields x,y (e.g. PiPo) |
2586 | animateFading(arr, cb) { | |
2587 | const animLength = 350; //TODO: 350ms? More? Less? | |
2588 | arr.forEach(v => { | |
2589 | let fadingPiece = this.getDomPiece(v.x, v.y); | |
2590 | fadingPiece.style.transitionDuration = (animLength / 1000) + "s"; | |
2591 | fadingPiece.style.opacity = "0"; | |
2592 | }); | |
2593 | setTimeout(cb, animLength); | |
2594 | } | |
2595 | ||
2596 | animate(move, callback) { | |
2597 | if (this.noAnimate || move.noAnimate) { | |
2598 | callback(); | |
2599 | return; | |
2600 | } | |
2601 | let segments = move.segments; | |
2602 | if (!segments) | |
2603 | segments = [ [[move.start.x, move.start.y], [move.end.x, move.end.y]] ]; | |
2604 | let targetObj = new TargetObj(callback); | |
2605 | if (move.start.x != move.end.x || move.start.y != move.end.y) { | |
2606 | targetObj.target++; | |
2607 | this.animateMoving(move.start, move.end, move.drag, segments, | |
2608 | () => targetObj.increment()); | |
2609 | } | |
2610 | if (move.vanish.length > move.appear.length) { | |
2611 | const arr = move.vanish.slice(move.appear.length) | |
e7d409fc BA |
2612 | // Ignore disappearing pieces hidden by some appearing ones: |
2613 | .filter(v => move.appear.every(a => a.x != v.x || a.y != v.y)); | |
5f08c59b BA |
2614 | if (arr.length > 0) { |
2615 | targetObj.target++; | |
2616 | this.animateFading(arr, () => targetObj.increment()); | |
2617 | } | |
2618 | } | |
462947f0 BA |
2619 | targetObj.target += |
2620 | this.tryAnimateCastle(move, () => targetObj.increment()); | |
5f08c59b BA |
2621 | targetObj.target += |
2622 | this.customAnimate(move, segments, () => targetObj.increment()); | |
2623 | if (targetObj.target == 0) | |
2624 | callback(); | |
2625 | } | |
2626 | ||
462947f0 BA |
2627 | tryAnimateCastle(move, cb) { |
2628 | if ( | |
2629 | this.hasCastle && | |
2630 | move.vanish.length == 2 && | |
2631 | move.appear.length == 2 && | |
2632 | this.isKing(0, 0, move.vanish[0].p) && | |
2633 | this.isKing(0, 0, move.appear[0].p) | |
2634 | ) { | |
2635 | const start = {x: move.vanish[1].x, y: move.vanish[1].y}, | |
2636 | end = {x: move.appear[1].x, y: move.appear[1].y}; | |
2637 | const segments = [ [[start.x, start.y], [end.x, end.y]] ]; | |
2638 | this.animateMoving(start, end, null, segments, cb); | |
2639 | return 1; | |
2640 | } | |
2641 | return 0; | |
2642 | } | |
2643 | ||
5f08c59b BA |
2644 | // Potential other animations (e.g. for Suction variant) |
2645 | customAnimate(move, segments, cb) { | |
2646 | return 0; //nb of targets | |
2647 | } | |
2648 | ||
126ffc70 | 2649 | launchAnimation(moves, container, callback) { |
98d14451 | 2650 | if (this.hideMoves) { |
b9877ed2 BA |
2651 | for (let i=0; i<moves.length; i++) |
2652 | // If hiding moves, they are revealed into play(): | |
2653 | this.play(moves[i], i == moves.length - 1 ? callback : () => {}); | |
98d14451 BA |
2654 | return; |
2655 | } | |
2656 | const r = container.querySelector(".chessboard").getBoundingClientRect(); | |
2657 | const animateRec = i => { | |
2658 | this.animate(moves[i], () => { | |
2659 | this.play(moves[i]); | |
2660 | this.playVisual(moves[i], r); | |
2661 | if (i < moves.length - 1) | |
2662 | setTimeout(() => animateRec(i+1), 300); | |
2663 | else | |
2664 | callback(); | |
2665 | }); | |
21e8e712 | 2666 | }; |
98d14451 BA |
2667 | animateRec(0); |
2668 | } | |
2669 | ||
2670 | playReceivedMove(moves, callback) { | |
e081c5eb BA |
2671 | // Delay if user wasn't focused: |
2672 | const checkDisplayThenAnimate = (delay) => { | |
3c61449b | 2673 | if (container.style.display == "none") { |
21e8e712 BA |
2674 | alert("New move! Let's go back to game..."); |
2675 | document.getElementById("gameInfos").style.display = "none"; | |
3c61449b | 2676 | container.style.display = "block"; |
126ffc70 BA |
2677 | setTimeout( |
2678 | () => this.launchAnimation(moves, container, callback), | |
2679 | 700 | |
2680 | ); | |
2681 | } | |
2682 | else { | |
2683 | setTimeout( | |
2684 | () => this.launchAnimation(moves, container, callback), | |
2685 | delay || 0 | |
2686 | ); | |
21e8e712 | 2687 | } |
21e8e712 | 2688 | }; |
3c61449b | 2689 | let container = document.getElementById(this.containerId); |
016306e3 BA |
2690 | if (document.hidden) { |
2691 | document.onvisibilitychange = () => { | |
2692 | document.onvisibilitychange = undefined; | |
e081c5eb | 2693 | checkDisplayThenAnimate(700); |
fd31883b | 2694 | }; |
fd31883b | 2695 | } |
b4ae3ff6 BA |
2696 | else |
2697 | checkDisplayThenAnimate(); | |
41534b92 BA |
2698 | } |
2699 | ||
2700 | }; |