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41534b92 BA |
1 | import { Random } from "/utils/alea.js"; |
2 | import { ArrayFun } from "/utils/array.js"; | |
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 | ||
5f08c59b BA |
114 | get hasMoveStack() { |
115 | return false; | |
116 | } | |
117 | ||
41534b92 | 118 | // Some variants use click infos: |
15106e82 BA |
119 | doClick(coords) { |
120 | if (typeof coords.x != "number") | |
b4ae3ff6 | 121 | return null; //click on reserves |
41534b92 | 122 | if ( |
cc2c7183 | 123 | this.options["teleport"] && this.subTurnTeleport == 2 && |
15106e82 | 124 | this.board[coords.x][coords.y] == "" |
41534b92 | 125 | ) { |
1a7c0492 | 126 | let res = new Move({ |
41534b92 BA |
127 | start: {x: this.captured.x, y: this.captured.y}, |
128 | appear: [ | |
129 | new PiPo({ | |
15106e82 BA |
130 | x: coords.x, |
131 | y: coords.y, | |
41534b92 BA |
132 | c: this.captured.c, //this.turn, |
133 | p: this.captured.p | |
134 | }) | |
135 | ], | |
1a7c0492 | 136 | vanish: [] |
41534b92 | 137 | }); |
1a7c0492 BA |
138 | res.drag = {c: this.captured.c, p: this.captured.p}; |
139 | return res; | |
41534b92 BA |
140 | } |
141 | return null; | |
142 | } | |
143 | ||
144 | //////////////////// | |
145 | // COORDINATES UTILS | |
146 | ||
4bff03f5 | 147 | // 3a --> {x:3, y:10} |
41534b92 | 148 | static SquareToCoords(sq) { |
15106e82 BA |
149 | return ArrayFun.toObject(["x", "y"], |
150 | [0, 1].map(i => parseInt(sq[i], 36))); | |
41534b92 BA |
151 | } |
152 | ||
4bff03f5 | 153 | // {x:11, y:12} --> bc |
15106e82 BA |
154 | static CoordsToSquare(cd) { |
155 | return Object.values(cd).map(c => c.toString(36)).join(""); | |
41534b92 BA |
156 | } |
157 | ||
15106e82 BA |
158 | coordsToId(cd) { |
159 | if (typeof cd.x == "number") { | |
160 | return ( | |
161 | `${this.containerId}|sq-${cd.x.toString(36)}-${cd.y.toString(36)}` | |
162 | ); | |
163 | } | |
41534b92 | 164 | // Reserve : |
15106e82 | 165 | return `${this.containerId}|rsq-${cd.x}-${cd.y}`; |
41534b92 BA |
166 | } |
167 | ||
168 | idToCoords(targetId) { | |
b4ae3ff6 BA |
169 | if (!targetId) |
170 | return null; //outside page, maybe... | |
41534b92 BA |
171 | const idParts = targetId.split('|'); //prefix|sq-2-3 (start at 0 => 3,4) |
172 | if ( | |
173 | idParts.length < 2 || | |
174 | idParts[0] != this.containerId || | |
175 | !idParts[1].match(/sq-[0-9a-zA-Z]-[0-9a-zA-Z]/) | |
176 | ) { | |
177 | return null; | |
178 | } | |
179 | const squares = idParts[1].split('-'); | |
180 | if (squares[0] == "sq") | |
15106e82 BA |
181 | return {x: parseInt(squares[1], 36), y: parseInt(squares[2], 36)}; |
182 | // squares[0] == "rsq" : reserve, 'c' + 'p' (letters color & piece) | |
183 | return {x: squares[1], y: squares[2]}; | |
41534b92 BA |
184 | } |
185 | ||
186 | ///////////// | |
187 | // FEN UTILS | |
188 | ||
189 | // Turn "wb" into "B" (for FEN) | |
190 | board2fen(b) { | |
4bff03f5 | 191 | return (b[0] == "w" ? b[1].toUpperCase() : b[1]); |
41534b92 BA |
192 | } |
193 | ||
194 | // Turn "p" into "bp" (for board) | |
195 | fen2board(f) { | |
4bff03f5 | 196 | return (f.charCodeAt(0) <= 90 ? "w" + f.toLowerCase() : "b" + f); |
41534b92 BA |
197 | } |
198 | ||
199 | // Setup the initial random-or-not (asymmetric-or-not) position | |
200 | genRandInitFen(seed) { | |
41534b92 | 201 | let fen, flags = "0707"; |
cc2c7183 | 202 | if (!this.options.randomness) |
41534b92 BA |
203 | // Deterministic: |
204 | fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w 0"; | |
205 | ||
206 | else { | |
207 | // Randomize | |
8f57fbf2 | 208 | Random.setSeed(seed); |
f382c57b | 209 | let pieces = {w: new Array(8), b: new Array(8)}; |
41534b92 BA |
210 | flags = ""; |
211 | // Shuffle pieces on first (and last rank if randomness == 2) | |
212 | for (let c of ["w", "b"]) { | |
213 | if (c == 'b' && this.options.randomness == 1) { | |
214 | pieces['b'] = pieces['w']; | |
215 | flags += flags; | |
216 | break; | |
217 | } | |
218 | ||
219 | let positions = ArrayFun.range(8); | |
220 | ||
221 | // Get random squares for bishops | |
222 | let randIndex = 2 * Random.randInt(4); | |
223 | const bishop1Pos = positions[randIndex]; | |
224 | // The second bishop must be on a square of different color | |
225 | let randIndex_tmp = 2 * Random.randInt(4) + 1; | |
226 | const bishop2Pos = positions[randIndex_tmp]; | |
227 | // Remove chosen squares | |
228 | positions.splice(Math.max(randIndex, randIndex_tmp), 1); | |
229 | positions.splice(Math.min(randIndex, randIndex_tmp), 1); | |
230 | ||
231 | // Get random squares for knights | |
232 | randIndex = Random.randInt(6); | |
233 | const knight1Pos = positions[randIndex]; | |
234 | positions.splice(randIndex, 1); | |
235 | randIndex = Random.randInt(5); | |
236 | const knight2Pos = positions[randIndex]; | |
237 | positions.splice(randIndex, 1); | |
238 | ||
239 | // Get random square for queen | |
240 | randIndex = Random.randInt(4); | |
241 | const queenPos = positions[randIndex]; | |
242 | positions.splice(randIndex, 1); | |
243 | ||
244 | // Rooks and king positions are now fixed, | |
245 | // because of the ordering rook-king-rook | |
246 | const rook1Pos = positions[0]; | |
247 | const kingPos = positions[1]; | |
248 | const rook2Pos = positions[2]; | |
249 | ||
250 | // Finally put the shuffled pieces in the board array | |
251 | pieces[c][rook1Pos] = "r"; | |
252 | pieces[c][knight1Pos] = "n"; | |
253 | pieces[c][bishop1Pos] = "b"; | |
254 | pieces[c][queenPos] = "q"; | |
255 | pieces[c][kingPos] = "k"; | |
256 | pieces[c][bishop2Pos] = "b"; | |
257 | pieces[c][knight2Pos] = "n"; | |
258 | pieces[c][rook2Pos] = "r"; | |
259 | flags += rook1Pos.toString() + rook2Pos.toString(); | |
260 | } | |
261 | fen = ( | |
262 | pieces["b"].join("") + | |
263 | "/pppppppp/8/8/8/8/PPPPPPPP/" + | |
264 | pieces["w"].join("").toUpperCase() + | |
265 | " w 0" | |
266 | ); | |
267 | } | |
268 | // Add turn + flags + enpassant (+ reserve) | |
269 | let parts = []; | |
b4ae3ff6 BA |
270 | if (this.hasFlags) |
271 | parts.push(`"flags":"${flags}"`); | |
272 | if (this.hasEnpassant) | |
273 | parts.push('"enpassant":"-"'); | |
fc12475f | 274 | if (this.hasReserveFen) |
b4ae3ff6 BA |
275 | parts.push('"reserve":"000000000000"'); |
276 | if (this.options["crazyhouse"]) | |
277 | parts.push('"ispawn":"-"'); | |
278 | if (parts.length >= 1) | |
279 | fen += " {" + parts.join(",") + "}"; | |
41534b92 BA |
280 | return fen; |
281 | } | |
282 | ||
283 | // "Parse" FEN: just return untransformed string data | |
284 | parseFen(fen) { | |
285 | const fenParts = fen.split(" "); | |
286 | let res = { | |
287 | position: fenParts[0], | |
288 | turn: fenParts[1], | |
289 | movesCount: fenParts[2] | |
290 | }; | |
b4ae3ff6 BA |
291 | if (fenParts.length > 3) |
292 | res = Object.assign(res, JSON.parse(fenParts[3])); | |
41534b92 BA |
293 | return res; |
294 | } | |
295 | ||
296 | // Return current fen (game state) | |
297 | getFen() { | |
298 | let fen = ( | |
15106e82 | 299 | this.getPosition() + " " + |
41534b92 BA |
300 | this.getTurnFen() + " " + |
301 | this.movesCount | |
302 | ); | |
303 | let parts = []; | |
b4ae3ff6 BA |
304 | if (this.hasFlags) |
305 | parts.push(`"flags":"${this.getFlagsFen()}"`); | |
41534b92 BA |
306 | if (this.hasEnpassant) |
307 | parts.push(`"enpassant":"${this.getEnpassantFen()}"`); | |
24872b22 | 308 | if (this.hasReserveFen) |
b4ae3ff6 | 309 | parts.push(`"reserve":"${this.getReserveFen()}"`); |
41534b92 BA |
310 | if (this.options["crazyhouse"]) |
311 | parts.push(`"ispawn":"${this.getIspawnFen()}"`); | |
b4ae3ff6 BA |
312 | if (parts.length >= 1) |
313 | fen += " {" + parts.join(",") + "}"; | |
41534b92 BA |
314 | return fen; |
315 | } | |
316 | ||
d621e620 BA |
317 | static FenEmptySquares(count) { |
318 | // if more than 9 consecutive free spaces, break the integer, | |
319 | // otherwise FEN parsing will fail. | |
320 | if (count <= 9) | |
321 | return count; | |
322 | // Most boards of size < 18: | |
323 | if (count <= 18) | |
324 | return "9" + (count - 9); | |
325 | // Except Gomoku: | |
326 | return "99" + (count - 18); | |
327 | } | |
328 | ||
41534b92 | 329 | // Position part of the FEN string |
15106e82 | 330 | getPosition() { |
41534b92 BA |
331 | let position = ""; |
332 | for (let i = 0; i < this.size.y; i++) { | |
333 | let emptyCount = 0; | |
334 | for (let j = 0; j < this.size.x; j++) { | |
b4ae3ff6 BA |
335 | if (this.board[i][j] == "") |
336 | emptyCount++; | |
41534b92 BA |
337 | else { |
338 | if (emptyCount > 0) { | |
339 | // Add empty squares in-between | |
d621e620 | 340 | position += C.FenEmptySquares(emptyCount); |
41534b92 BA |
341 | emptyCount = 0; |
342 | } | |
343 | position += this.board2fen(this.board[i][j]); | |
344 | } | |
345 | } | |
346 | if (emptyCount > 0) | |
347 | // "Flush remainder" | |
d621e620 | 348 | position += C.FenEmptySquares(emptyCount); |
b4ae3ff6 BA |
349 | if (i < this.size.y - 1) |
350 | position += "/"; //separate rows | |
41534b92 BA |
351 | } |
352 | return position; | |
353 | } | |
354 | ||
355 | getTurnFen() { | |
356 | return this.turn; | |
357 | } | |
358 | ||
359 | // Flags part of the FEN string | |
360 | getFlagsFen() { | |
361 | return ["w", "b"].map(c => { | |
15106e82 | 362 | return this.castleFlags[c].map(x => x.toString(36)).join(""); |
41534b92 BA |
363 | }).join(""); |
364 | } | |
365 | ||
366 | // Enpassant part of the FEN string | |
367 | getEnpassantFen() { | |
b4ae3ff6 BA |
368 | if (!this.epSquare) |
369 | return "-"; //no en-passant | |
cc2c7183 | 370 | return C.CoordsToSquare(this.epSquare); |
41534b92 BA |
371 | } |
372 | ||
373 | getReserveFen() { | |
374 | return ( | |
375 | ["w","b"].map(c => Object.values(this.reserve[c]).join("")).join("") | |
376 | ); | |
377 | } | |
378 | ||
379 | getIspawnFen() { | |
15106e82 BA |
380 | const squares = Object.keys(this.ispawn); |
381 | if (squares.length == 0) | |
b4ae3ff6 | 382 | return "-"; |
15106e82 | 383 | return squares.join(","); |
41534b92 BA |
384 | } |
385 | ||
386 | // Set flags from fen (castle: white a,h then black a,h) | |
387 | setFlags(fenflags) { | |
388 | this.castleFlags = { | |
15106e82 BA |
389 | w: [0, 1].map(i => parseInt(fenflags.charAt(i), 36)), |
390 | b: [2, 3].map(i => parseInt(fenflags.charAt(i), 36)) | |
41534b92 BA |
391 | }; |
392 | } | |
393 | ||
394 | ////////////////// | |
395 | // INITIALIZATION | |
396 | ||
bc2bc396 | 397 | constructor(o) { |
41534b92 | 398 | this.options = o.options; |
535c464b BA |
399 | // Fill missing options (always the case if random challenge) |
400 | (V.Options.select || []).concat(V.Options.input || []).forEach(opt => { | |
401 | if (this.options[opt.variable] === undefined) | |
402 | this.options[opt.variable] = opt.defaut; | |
403 | }); | |
bc2bc396 | 404 | if (o.genFenOnly) |
f382c57b BA |
405 | // This object will be used only for initial FEN generation |
406 | return; | |
41534b92 | 407 | this.playerColor = o.color; |
15106e82 | 408 | this.afterPlay = o.afterPlay; //trigger some actions after playing a move |
41534b92 | 409 | |
c9ab0340 | 410 | // Fen string fully describes the game state |
b4ae3ff6 BA |
411 | if (!o.fen) |
412 | o.fen = this.genRandInitFen(o.seed); | |
5f08c59b | 413 | this.re_initFromFen(o.fen); |
41534b92 BA |
414 | |
415 | // Graphical (can use variables defined above) | |
416 | this.containerId = o.element; | |
417 | this.graphicalInit(); | |
418 | } | |
419 | ||
5f08c59b BA |
420 | re_initFromFen(fen, oldBoard) { |
421 | const fenParsed = this.parseFen(fen); | |
422 | this.board = oldBoard || this.getBoard(fenParsed.position); | |
423 | this.turn = fenParsed.turn; | |
424 | this.movesCount = parseInt(fenParsed.movesCount, 10); | |
425 | this.setOtherVariables(fenParsed); | |
426 | } | |
427 | ||
41534b92 BA |
428 | // Turn position fen into double array ["wb","wp","bk",...] |
429 | getBoard(position) { | |
430 | const rows = position.split("/"); | |
431 | let board = ArrayFun.init(this.size.x, this.size.y, ""); | |
432 | for (let i = 0; i < rows.length; i++) { | |
433 | let j = 0; | |
434 | for (let indexInRow = 0; indexInRow < rows[i].length; indexInRow++) { | |
435 | const character = rows[i][indexInRow]; | |
436 | const num = parseInt(character, 10); | |
437 | // If num is a number, just shift j: | |
b4ae3ff6 BA |
438 | if (!isNaN(num)) |
439 | j += num; | |
41534b92 | 440 | // Else: something at position i,j |
b4ae3ff6 BA |
441 | else |
442 | board[i][j++] = this.fen2board(character); | |
41534b92 BA |
443 | } |
444 | } | |
445 | return board; | |
446 | } | |
447 | ||
448 | // Some additional variables from FEN (variant dependant) | |
449 | setOtherVariables(fenParsed) { | |
450 | // Set flags and enpassant: | |
b4ae3ff6 BA |
451 | if (this.hasFlags) |
452 | this.setFlags(fenParsed.flags); | |
41534b92 BA |
453 | if (this.hasEnpassant) |
454 | this.epSquare = this.getEpSquare(fenParsed.enpassant); | |
b4ae3ff6 BA |
455 | if (this.hasReserve) |
456 | this.initReserves(fenParsed.reserve); | |
457 | if (this.options["crazyhouse"]) | |
458 | this.initIspawn(fenParsed.ispawn); | |
cc2c7183 BA |
459 | if (this.options["teleport"]) { |
460 | this.subTurnTeleport = 1; | |
461 | this.captured = null; | |
462 | } | |
41534b92 | 463 | if (this.options["dark"]) { |
41534b92 | 464 | // Setup enlightened: squares reachable by player side |
c9ab0340 BA |
465 | this.enlightened = ArrayFun.init(this.size.x, this.size.y, false); |
466 | this.updateEnlightened(); | |
41534b92 | 467 | } |
5f08c59b BA |
468 | this.subTurn = 1; //may be unused |
469 | if (!this.moveStack) //avoid resetting (unwanted) | |
470 | this.moveStack = []; | |
41534b92 BA |
471 | } |
472 | ||
c9ab0340 BA |
473 | updateEnlightened() { |
474 | this.oldEnlightened = this.enlightened; | |
475 | this.enlightened = ArrayFun.init(this.size.x, this.size.y, false); | |
41534b92 | 476 | // Add pieces positions + all squares reachable by moves (includes Zen): |
41534b92 BA |
477 | for (let x=0; x<this.size.x; x++) { |
478 | for (let y=0; y<this.size.y; y++) { | |
479 | if (this.board[x][y] != "" && this.getColor(x, y) == this.playerColor) | |
480 | { | |
c9ab0340 | 481 | this.enlightened[x][y] = true; |
41534b92 | 482 | this.getPotentialMovesFrom([x, y]).forEach(m => { |
c9ab0340 | 483 | this.enlightened[m.end.x][m.end.y] = true; |
41534b92 BA |
484 | }); |
485 | } | |
486 | } | |
487 | } | |
b4ae3ff6 | 488 | if (this.epSquare) |
c9ab0340 | 489 | this.enlightEnpassant(); |
41534b92 BA |
490 | } |
491 | ||
c9ab0340 BA |
492 | // Include square of the en-passant capturing square: |
493 | enlightEnpassant() { | |
494 | // NOTE: shortcut, pawn has only one attack type, doesn't depend on square | |
495 | const steps = this.pieces(this.playerColor)["p"].attack[0].steps; | |
41534b92 BA |
496 | for (let step of steps) { |
497 | const x = this.epSquare.x - step[0], | |
d262cff4 | 498 | y = this.getY(this.epSquare.y - step[1]); |
41534b92 BA |
499 | if ( |
500 | this.onBoard(x, y) && | |
501 | this.getColor(x, y) == this.playerColor && | |
cc2c7183 | 502 | this.getPieceType(x, y) == "p" |
41534b92 | 503 | ) { |
c9ab0340 | 504 | this.enlightened[x][this.epSquare.y] = true; |
41534b92 BA |
505 | break; |
506 | } | |
507 | } | |
508 | } | |
509 | ||
c9ab0340 | 510 | // ordering as in pieces() p,r,n,b,q,k (+ count in base 30 if needed) |
41534b92 BA |
511 | initReserves(reserveStr) { |
512 | const counts = reserveStr.split("").map(c => parseInt(c, 30)); | |
513 | this.reserve = { w: {}, b: {} }; | |
c9ab0340 BA |
514 | const pieceName = ['p', 'r', 'n', 'b', 'q', 'k']; |
515 | const L = pieceName.length; | |
516 | for (let i of ArrayFun.range(2 * L)) { | |
517 | if (i < L) | |
b4ae3ff6 BA |
518 | this.reserve['w'][pieceName[i]] = counts[i]; |
519 | else | |
c9ab0340 | 520 | this.reserve['b'][pieceName[i-L]] = counts[i]; |
41534b92 BA |
521 | } |
522 | } | |
523 | ||
524 | initIspawn(ispawnStr) { | |
15106e82 BA |
525 | if (ispawnStr != "-") |
526 | this.ispawn = ArrayFun.toObject(ispawnStr.split(","), true); | |
b4ae3ff6 BA |
527 | else |
528 | this.ispawn = {}; | |
41534b92 BA |
529 | } |
530 | ||
531 | getNbReservePieces(color) { | |
532 | return ( | |
533 | Object.values(this.reserve[color]).reduce( | |
534 | (oldV,newV) => oldV + (newV > 0 ? 1 : 0), 0) | |
535 | ); | |
536 | } | |
537 | ||
15106e82 BA |
538 | getRankInReserve(c, p) { |
539 | const pieces = Object.keys(this.pieces()); | |
540 | const lastIndex = pieces.findIndex(pp => pp == p) | |
541 | let toTest = pieces.slice(0, lastIndex); | |
542 | return toTest.reduce( | |
543 | (oldV,newV) => oldV + (this.reserve[c][newV] > 0 ? 1 : 0), 0); | |
544 | } | |
545 | ||
41534b92 BA |
546 | ////////////// |
547 | // VISUAL PART | |
548 | ||
549 | getPieceWidth(rwidth) { | |
550 | return (rwidth / this.size.y); | |
551 | } | |
552 | ||
41534b92 | 553 | getReserveSquareSize(rwidth, nbR) { |
15106e82 | 554 | const sqSize = this.getPieceWidth(rwidth); |
41534b92 BA |
555 | return Math.min(sqSize, rwidth / nbR); |
556 | } | |
557 | ||
558 | getReserveNumId(color, piece) { | |
559 | return `${this.containerId}|rnum-${color}${piece}`; | |
560 | } | |
561 | ||
3b641716 BA |
562 | static AddClass_es(piece, class_es) { |
563 | if (!Array.isArray(class_es)) | |
564 | class_es = [class_es]; | |
565 | class_es.forEach(cl => { | |
566 | piece.classList.add(cl); | |
567 | }); | |
568 | } | |
569 | ||
570 | static RemoveClass_es(piece, class_es) { | |
571 | if (!Array.isArray(class_es)) | |
572 | class_es = [class_es]; | |
573 | class_es.forEach(cl => { | |
574 | piece.classList.remove(cl); | |
575 | }); | |
576 | } | |
577 | ||
41534b92 BA |
578 | graphicalInit() { |
579 | // NOTE: not window.onresize = this.re_drawBoardElts because scope (this) | |
580 | window.onresize = () => this.re_drawBoardElements(); | |
581 | this.re_drawBoardElements(); | |
582 | this.initMouseEvents(); | |
3c61449b BA |
583 | const chessboard = |
584 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
41534b92 BA |
585 | } |
586 | ||
587 | re_drawBoardElements() { | |
588 | const board = this.getSvgChessboard(); | |
cc2c7183 | 589 | const oppCol = C.GetOppCol(this.playerColor); |
3c61449b BA |
590 | let chessboard = |
591 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
592 | chessboard.innerHTML = ""; | |
593 | chessboard.insertAdjacentHTML('beforeend', board); | |
41534b92 BA |
594 | // Compare window ratio width / height to aspectRatio: |
595 | const windowRatio = window.innerWidth / window.innerHeight; | |
596 | let cbWidth, cbHeight; | |
f55a0a67 BA |
597 | const vRatio = this.size.ratio || 1; |
598 | if (windowRatio <= vRatio) { | |
41534b92 BA |
599 | // Limiting dimension is width: |
600 | cbWidth = Math.min(window.innerWidth, 767); | |
f55a0a67 | 601 | cbHeight = cbWidth / vRatio; |
41534b92 BA |
602 | } |
603 | else { | |
604 | // Limiting dimension is height: | |
605 | cbHeight = Math.min(window.innerHeight, 767); | |
f55a0a67 | 606 | cbWidth = cbHeight * vRatio; |
41534b92 | 607 | } |
1a7c0492 | 608 | if (this.hasReserve) { |
41534b92 BA |
609 | const sqSize = cbWidth / this.size.y; |
610 | // NOTE: allocate space for reserves (up/down) even if they are empty | |
15106e82 | 611 | // Cannot use getReserveSquareSize() here, but sqSize is an upper bound. |
41534b92 BA |
612 | if ((window.innerHeight - cbHeight) / 2 < sqSize + 5) { |
613 | cbHeight = window.innerHeight - 2 * (sqSize + 5); | |
f55a0a67 | 614 | cbWidth = cbHeight * vRatio; |
41534b92 BA |
615 | } |
616 | } | |
3c61449b BA |
617 | chessboard.style.width = cbWidth + "px"; |
618 | chessboard.style.height = cbHeight + "px"; | |
41534b92 BA |
619 | // Center chessboard: |
620 | const spaceLeft = (window.innerWidth - cbWidth) / 2, | |
621 | spaceTop = (window.innerHeight - cbHeight) / 2; | |
3c61449b BA |
622 | chessboard.style.left = spaceLeft + "px"; |
623 | chessboard.style.top = spaceTop + "px"; | |
41534b92 BA |
624 | // Give sizes instead of recomputing them, |
625 | // because chessboard might not be drawn yet. | |
626 | this.setupPieces({ | |
627 | width: cbWidth, | |
628 | height: cbHeight, | |
629 | x: spaceLeft, | |
630 | y: spaceTop | |
631 | }); | |
632 | } | |
633 | ||
634 | // Get SVG board (background, no pieces) | |
635 | getSvgChessboard() { | |
41534b92 BA |
636 | const flipped = (this.playerColor == 'b'); |
637 | let board = ` | |
638 | <svg | |
f55a0a67 | 639 | viewBox="0 0 ${10*this.size.y} ${10*this.size.x}" |
535c464b | 640 | class="chessboard_SVG">`; |
728cb1e3 BA |
641 | for (let i=0; i < this.size.x; i++) { |
642 | for (let j=0; j < this.size.y; j++) { | |
41534b92 BA |
643 | const ii = (flipped ? this.size.x - 1 - i : i); |
644 | const jj = (flipped ? this.size.y - 1 - j : j); | |
c7bf7b1b BA |
645 | let classes = this.getSquareColorClass(ii, jj); |
646 | if (this.enlightened && !this.enlightened[ii][jj]) | |
647 | classes += " in-shadow"; | |
41534b92 | 648 | // NOTE: x / y reversed because coordinates system is reversed. |
535c464b BA |
649 | board += ` |
650 | <rect | |
651 | class="${classes}" | |
652 | id="${this.coordsToId({x: ii, y: jj})}" | |
653 | width="10" | |
654 | height="10" | |
655 | x="${10*j}" | |
656 | y="${10*i}" | |
657 | />`; | |
41534b92 BA |
658 | } |
659 | } | |
535c464b | 660 | board += "</svg>"; |
41534b92 BA |
661 | return board; |
662 | } | |
663 | ||
cc2c7183 | 664 | // Generally light square bottom-right |
15106e82 BA |
665 | getSquareColorClass(x, y) { |
666 | return ((x+y) % 2 == 0 ? "light-square": "dark-square"); | |
41534b92 BA |
667 | } |
668 | ||
669 | setupPieces(r) { | |
670 | if (this.g_pieces) { | |
671 | // Refreshing: delete old pieces first | |
672 | for (let i=0; i<this.size.x; i++) { | |
673 | for (let j=0; j<this.size.y; j++) { | |
674 | if (this.g_pieces[i][j]) { | |
675 | this.g_pieces[i][j].remove(); | |
676 | this.g_pieces[i][j] = null; | |
677 | } | |
678 | } | |
679 | } | |
680 | } | |
b4ae3ff6 BA |
681 | else |
682 | this.g_pieces = ArrayFun.init(this.size.x, this.size.y, null); | |
3c61449b BA |
683 | let chessboard = |
684 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
b4ae3ff6 BA |
685 | if (!r) |
686 | r = chessboard.getBoundingClientRect(); | |
41534b92 BA |
687 | const pieceWidth = this.getPieceWidth(r.width); |
688 | for (let i=0; i < this.size.x; i++) { | |
689 | for (let j=0; j < this.size.y; j++) { | |
c9ab0340 | 690 | if (this.board[i][j] != "") { |
41534b92 | 691 | const color = this.getColor(i, j); |
cc2c7183 | 692 | const piece = this.getPiece(i, j); |
41534b92 | 693 | this.g_pieces[i][j] = document.createElement("piece"); |
2159c239 BA |
694 | C.AddClass_es(this.g_pieces[i][j], |
695 | this.pieces(color, i, j)[piece]["class"]); | |
15106e82 | 696 | this.g_pieces[i][j].classList.add(C.GetColorClass(color)); |
41534b92 BA |
697 | this.g_pieces[i][j].style.width = pieceWidth + "px"; |
698 | this.g_pieces[i][j].style.height = pieceWidth + "px"; | |
9db5050a BA |
699 | let [ip, jp] = this.getPixelPosition(i, j, r); |
700 | // Translate coordinates to use chessboard as reference: | |
701 | this.g_pieces[i][j].style.transform = | |
702 | `translate(${ip - r.x}px,${jp - r.y}px)`; | |
c9ab0340 BA |
703 | if (this.enlightened && !this.enlightened[i][j]) |
704 | this.g_pieces[i][j].classList.add("hidden"); | |
3c61449b | 705 | chessboard.appendChild(this.g_pieces[i][j]); |
41534b92 BA |
706 | } |
707 | } | |
708 | } | |
1a7c0492 | 709 | if (this.hasReserve) |
b4ae3ff6 | 710 | this.re_drawReserve(['w', 'b'], r); |
41534b92 BA |
711 | } |
712 | ||
24872b22 | 713 | // NOTE: assume this.reserve != null |
41534b92 BA |
714 | re_drawReserve(colors, r) { |
715 | if (this.r_pieces) { | |
716 | // Remove (old) reserve pieces | |
717 | for (let c of colors) { | |
24872b22 BA |
718 | Object.keys(this.r_pieces[c]).forEach(p => { |
719 | this.r_pieces[c][p].remove(); | |
720 | delete this.r_pieces[c][p]; | |
721 | const numId = this.getReserveNumId(c, p); | |
722 | document.getElementById(numId).remove(); | |
41534b92 | 723 | }); |
41534b92 BA |
724 | } |
725 | } | |
b4ae3ff6 | 726 | else |
9db5050a BA |
727 | this.r_pieces = { w: {}, b: {} }; |
728 | let container = document.getElementById(this.containerId); | |
b4ae3ff6 | 729 | if (!r) |
9db5050a | 730 | r = container.querySelector(".chessboard").getBoundingClientRect(); |
41534b92 | 731 | for (let c of colors) { |
24872b22 BA |
732 | let reservesDiv = document.getElementById("reserves_" + c); |
733 | if (reservesDiv) | |
734 | reservesDiv.remove(); | |
b4ae3ff6 BA |
735 | if (!this.reserve[c]) |
736 | continue; | |
41534b92 | 737 | const nbR = this.getNbReservePieces(c); |
b4ae3ff6 BA |
738 | if (nbR == 0) |
739 | continue; | |
41534b92 BA |
740 | const sqResSize = this.getReserveSquareSize(r.width, nbR); |
741 | let ridx = 0; | |
742 | const vShift = (c == this.playerColor ? r.height + 5 : -sqResSize - 5); | |
743 | const [i0, j0] = [r.x, r.y + vShift]; | |
744 | let rcontainer = document.createElement("div"); | |
745 | rcontainer.id = "reserves_" + c; | |
746 | rcontainer.classList.add("reserves"); | |
747 | rcontainer.style.left = i0 + "px"; | |
748 | rcontainer.style.top = j0 + "px"; | |
1aa9054d BA |
749 | // NOTE: +1 fix display bug on Firefox at least |
750 | rcontainer.style.width = (nbR * sqResSize + 1) + "px"; | |
41534b92 | 751 | rcontainer.style.height = sqResSize + "px"; |
9db5050a | 752 | container.appendChild(rcontainer); |
41534b92 | 753 | for (let p of Object.keys(this.reserve[c])) { |
b4ae3ff6 BA |
754 | if (this.reserve[c][p] == 0) |
755 | continue; | |
41534b92 | 756 | let r_cell = document.createElement("div"); |
15106e82 | 757 | r_cell.id = this.coordsToId({x: c, y: p}); |
41534b92 | 758 | r_cell.classList.add("reserve-cell"); |
1aa9054d BA |
759 | r_cell.style.width = sqResSize + "px"; |
760 | r_cell.style.height = sqResSize + "px"; | |
41534b92 BA |
761 | rcontainer.appendChild(r_cell); |
762 | let piece = document.createElement("piece"); | |
2159c239 | 763 | C.AddClass_es(piece, this.pieces(c, c, p)[p]["class"]); |
15106e82 | 764 | piece.classList.add(C.GetColorClass(c)); |
41534b92 BA |
765 | piece.style.width = "100%"; |
766 | piece.style.height = "100%"; | |
767 | this.r_pieces[c][p] = piece; | |
768 | r_cell.appendChild(piece); | |
769 | let number = document.createElement("div"); | |
770 | number.textContent = this.reserve[c][p]; | |
771 | number.classList.add("reserve-num"); | |
772 | number.id = this.getReserveNumId(c, p); | |
773 | const fontSize = "1.3em"; | |
774 | number.style.fontSize = fontSize; | |
775 | number.style.fontSize = fontSize; | |
776 | r_cell.appendChild(number); | |
777 | ridx++; | |
778 | } | |
779 | } | |
780 | } | |
781 | ||
782 | updateReserve(color, piece, count) { | |
55a15dcb | 783 | if (this.options["cannibal"] && C.CannibalKings[piece]) |
cc2c7183 | 784 | piece = "k"; //capturing cannibal king: back to king form |
41534b92 BA |
785 | const oldCount = this.reserve[color][piece]; |
786 | this.reserve[color][piece] = count; | |
787 | // Redrawing is much easier if count==0 | |
b4ae3ff6 BA |
788 | if ([oldCount, count].includes(0)) |
789 | this.re_drawReserve([color]); | |
41534b92 BA |
790 | else { |
791 | const numId = this.getReserveNumId(color, piece); | |
792 | document.getElementById(numId).textContent = count; | |
793 | } | |
794 | } | |
795 | ||
15106e82 BA |
796 | // Apply diff this.enlightened --> oldEnlightened on board |
797 | graphUpdateEnlightened() { | |
798 | let chessboard = | |
799 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
800 | const r = chessboard.getBoundingClientRect(); | |
801 | const pieceWidth = this.getPieceWidth(r.width); | |
802 | for (let x=0; x<this.size.x; x++) { | |
803 | for (let y=0; y<this.size.y; y++) { | |
804 | if (!this.enlightened[x][y] && this.oldEnlightened[x][y]) { | |
6997e386 | 805 | let elt = document.getElementById(this.coordsToId({x: x, y: y})); |
15106e82 BA |
806 | elt.classList.add("in-shadow"); |
807 | if (this.g_pieces[x][y]) | |
808 | this.g_pieces[x][y].classList.add("hidden"); | |
809 | } | |
810 | else if (this.enlightened[x][y] && !this.oldEnlightened[x][y]) { | |
6997e386 | 811 | let elt = document.getElementById(this.coordsToId({x: x, y: y})); |
15106e82 BA |
812 | elt.classList.remove("in-shadow"); |
813 | if (this.g_pieces[x][y]) | |
814 | this.g_pieces[x][y].classList.remove("hidden"); | |
815 | } | |
816 | } | |
817 | } | |
818 | } | |
819 | ||
c4e9bb92 BA |
820 | // Resize board: no need to destroy/recreate pieces |
821 | rescale(mode) { | |
822 | let chessboard = | |
823 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
824 | const r = chessboard.getBoundingClientRect(); | |
825 | const multFact = (mode == "up" ? 1.05 : 0.95); | |
826 | let [newWidth, newHeight] = [multFact * r.width, multFact * r.height]; | |
535c464b | 827 | // Stay in window: |
f55a0a67 | 828 | const vRatio = this.size.ratio || 1; |
c4e9bb92 | 829 | if (newWidth > window.innerWidth) { |
535c464b | 830 | newWidth = window.innerWidth; |
f55a0a67 | 831 | newHeight = newWidth / vRatio; |
c4e9bb92 BA |
832 | } |
833 | if (newHeight > window.innerHeight) { | |
535c464b | 834 | newHeight = window.innerHeight; |
f55a0a67 | 835 | newWidth = newHeight * vRatio; |
c4e9bb92 | 836 | } |
535c464b BA |
837 | chessboard.style.width = newWidth + "px"; |
838 | chessboard.style.height = newHeight + "px"; | |
41534b92 | 839 | const newX = (window.innerWidth - newWidth) / 2; |
3c61449b | 840 | chessboard.style.left = newX + "px"; |
41534b92 | 841 | const newY = (window.innerHeight - newHeight) / 2; |
3c61449b | 842 | chessboard.style.top = newY + "px"; |
9db5050a | 843 | const newR = {x: newX, y: newY, width: newWidth, height: newHeight}; |
c4e9bb92 | 844 | const pieceWidth = this.getPieceWidth(newWidth); |
d621e620 BA |
845 | // NOTE: next "if" for variants which use squares filling |
846 | // instead of "physical", moving pieces | |
847 | if (this.g_pieces) { | |
c4e9bb92 BA |
848 | for (let i=0; i < this.size.x; i++) { |
849 | for (let j=0; j < this.size.y; j++) { | |
850 | if (this.g_pieces[i][j]) { | |
d621e620 | 851 | // NOTE: could also use CSS transform "scale" |
c4e9bb92 BA |
852 | this.g_pieces[i][j].style.width = pieceWidth + "px"; |
853 | this.g_pieces[i][j].style.height = pieceWidth + "px"; | |
854 | const [ip, jp] = this.getPixelPosition(i, j, newR); | |
d621e620 | 855 | // Translate coordinates to use chessboard as reference: |
c4e9bb92 | 856 | this.g_pieces[i][j].style.transform = |
d621e620 BA |
857 | `translate(${ip - newX}px,${jp - newY}px)`; |
858 | } | |
41534b92 BA |
859 | } |
860 | } | |
861 | } | |
c4e9bb92 BA |
862 | if (this.hasReserve) |
863 | this.rescaleReserve(newR); | |
41534b92 BA |
864 | } |
865 | ||
866 | rescaleReserve(r) { | |
41534b92 | 867 | for (let c of ['w','b']) { |
b4ae3ff6 BA |
868 | if (!this.reserve[c]) |
869 | continue; | |
41534b92 | 870 | const nbR = this.getNbReservePieces(c); |
b4ae3ff6 BA |
871 | if (nbR == 0) |
872 | continue; | |
41534b92 BA |
873 | // Resize container first |
874 | const sqResSize = this.getReserveSquareSize(r.width, nbR); | |
875 | const vShift = (c == this.playerColor ? r.height + 5 : -sqResSize - 5); | |
876 | const [i0, j0] = [r.x, r.y + vShift]; | |
877 | let rcontainer = document.getElementById("reserves_" + c); | |
878 | rcontainer.style.left = i0 + "px"; | |
879 | rcontainer.style.top = j0 + "px"; | |
1aa9054d | 880 | rcontainer.style.width = (nbR * sqResSize + 1) + "px"; |
41534b92 BA |
881 | rcontainer.style.height = sqResSize + "px"; |
882 | // And then reserve cells: | |
883 | const rpieceWidth = this.getReserveSquareSize(r.width, nbR); | |
884 | Object.keys(this.reserve[c]).forEach(p => { | |
b4ae3ff6 BA |
885 | if (this.reserve[c][p] == 0) |
886 | return; | |
15106e82 | 887 | let r_cell = document.getElementById(this.coordsToId({x: c, y: p})); |
1aa9054d BA |
888 | r_cell.style.width = sqResSize + "px"; |
889 | r_cell.style.height = sqResSize + "px"; | |
41534b92 BA |
890 | }); |
891 | } | |
892 | } | |
893 | ||
9db5050a | 894 | // Return the absolute pixel coordinates given current position. |
41534b92 BA |
895 | // Our coordinate system differs from CSS one (x <--> y). |
896 | // We return here the CSS coordinates (more useful). | |
897 | getPixelPosition(i, j, r) { | |
b4ae3ff6 BA |
898 | if (i < 0 || j < 0) |
899 | return [0, 0]; //piece vanishes | |
15106e82 BA |
900 | let x, y; |
901 | if (typeof i == "string") { | |
902 | // Reserves: need to know the rank of piece | |
903 | const nbR = this.getNbReservePieces(i); | |
904 | const rsqSize = this.getReserveSquareSize(r.width, nbR); | |
905 | x = this.getRankInReserve(i, j) * rsqSize; | |
906 | y = (this.playerColor == i ? y = r.height + 5 : - 5 - rsqSize); | |
907 | } | |
908 | else { | |
909 | const sqSize = r.width / this.size.y; | |
910 | const flipped = (this.playerColor == 'b'); | |
911 | x = (flipped ? this.size.y - 1 - j : j) * sqSize; | |
912 | y = (flipped ? this.size.x - 1 - i : i) * sqSize; | |
913 | } | |
9db5050a | 914 | return [r.x + x, r.y + y]; |
41534b92 BA |
915 | } |
916 | ||
917 | initMouseEvents() { | |
9db5050a BA |
918 | let container = document.getElementById(this.containerId); |
919 | let chessboard = container.querySelector(".chessboard"); | |
41534b92 BA |
920 | |
921 | const getOffset = e => { | |
3c61449b BA |
922 | if (e.clientX) |
923 | // Mouse | |
924 | return {x: e.clientX, y: e.clientY}; | |
41534b92 BA |
925 | let touchLocation = null; |
926 | if (e.targetTouches && e.targetTouches.length >= 1) | |
927 | // Touch screen, dragstart | |
928 | touchLocation = e.targetTouches[0]; | |
929 | else if (e.changedTouches && e.changedTouches.length >= 1) | |
930 | // Touch screen, dragend | |
931 | touchLocation = e.changedTouches[0]; | |
932 | if (touchLocation) | |
11625344 | 933 | return {x: touchLocation.clientX, y: touchLocation.clientY}; |
57b8015b | 934 | return {x: 0, y: 0}; //shouldn't reach here =) |
41534b92 BA |
935 | } |
936 | ||
937 | const centerOnCursor = (piece, e) => { | |
15106e82 | 938 | const centerShift = this.getPieceWidth(r.width) / 2; |
41534b92 | 939 | const offset = getOffset(e); |
9db5050a BA |
940 | piece.style.left = (offset.x - centerShift) + "px"; |
941 | piece.style.top = (offset.y - centerShift) + "px"; | |
41534b92 BA |
942 | } |
943 | ||
944 | let start = null, | |
945 | r = null, | |
946 | startPiece, curPiece = null, | |
15106e82 | 947 | pieceWidth; |
41534b92 | 948 | const mousedown = (e) => { |
cb17fed8 | 949 | // Disable zoom on smartphones: |
b4ae3ff6 BA |
950 | if (e.touches && e.touches.length > 1) |
951 | e.preventDefault(); | |
3c61449b | 952 | r = chessboard.getBoundingClientRect(); |
15106e82 BA |
953 | pieceWidth = this.getPieceWidth(r.width); |
954 | const cd = this.idToCoords(e.target.id); | |
955 | if (cd) { | |
956 | const move = this.doClick(cd); | |
b4ae3ff6 BA |
957 | if (move) |
958 | this.playPlusVisual(move); | |
41534b92 | 959 | else { |
15106e82 BA |
960 | const [x, y] = Object.values(cd); |
961 | if (typeof x != "number") | |
962 | startPiece = this.r_pieces[x][y]; | |
963 | else | |
964 | startPiece = this.g_pieces[x][y]; | |
965 | if (startPiece && this.canIplay(x, y)) { | |
41534b92 | 966 | e.preventDefault(); |
15106e82 | 967 | start = cd; |
41534b92 BA |
968 | curPiece = startPiece.cloneNode(); |
969 | curPiece.style.transform = "none"; | |
970 | curPiece.style.zIndex = 5; | |
15106e82 BA |
971 | curPiece.style.width = pieceWidth + "px"; |
972 | curPiece.style.height = pieceWidth + "px"; | |
41534b92 | 973 | centerOnCursor(curPiece, e); |
9db5050a | 974 | container.appendChild(curPiece); |
41534b92 | 975 | startPiece.style.opacity = "0.4"; |
3c61449b | 976 | chessboard.style.cursor = "none"; |
41534b92 BA |
977 | } |
978 | } | |
979 | } | |
980 | }; | |
981 | ||
982 | const mousemove = (e) => { | |
983 | if (start) { | |
984 | e.preventDefault(); | |
985 | centerOnCursor(curPiece, e); | |
986 | } | |
11625344 BA |
987 | else if (e.changedTouches && e.changedTouches.length >= 1) |
988 | // Attempt to prevent horizontal swipe... | |
989 | e.preventDefault(); | |
41534b92 BA |
990 | }; |
991 | ||
992 | const mouseup = (e) => { | |
b4ae3ff6 BA |
993 | if (!start) |
994 | return; | |
41534b92 BA |
995 | const [x, y] = [start.x, start.y]; |
996 | start = null; | |
997 | e.preventDefault(); | |
3c61449b | 998 | chessboard.style.cursor = "pointer"; |
41534b92 BA |
999 | startPiece.style.opacity = "1"; |
1000 | const offset = getOffset(e); | |
1001 | const landingElt = document.elementFromPoint(offset.x, offset.y); | |
15106e82 BA |
1002 | const cd = |
1003 | (landingElt ? this.idToCoords(landingElt.id) : undefined); | |
1004 | if (cd) { | |
41534b92 BA |
1005 | // NOTE: clearly suboptimal, but much easier, and not a big deal. |
1006 | const potentialMoves = this.getPotentialMovesFrom([x, y]) | |
15106e82 | 1007 | .filter(m => m.end.x == cd.x && m.end.y == cd.y); |
41534b92 | 1008 | const moves = this.filterValid(potentialMoves); |
b4ae3ff6 BA |
1009 | if (moves.length >= 2) |
1010 | this.showChoices(moves, r); | |
1011 | else if (moves.length == 1) | |
1012 | this.playPlusVisual(moves[0], r); | |
41534b92 BA |
1013 | } |
1014 | curPiece.remove(); | |
1015 | }; | |
1016 | ||
1017 | if ('onmousedown' in window) { | |
1018 | document.addEventListener("mousedown", mousedown); | |
1019 | document.addEventListener("mousemove", mousemove); | |
1020 | document.addEventListener("mouseup", mouseup); | |
437dfd42 BA |
1021 | document.addEventListener("wheel", |
1022 | (e) => this.rescale(e.deltaY < 0 ? "up" : "down")); | |
41534b92 BA |
1023 | } |
1024 | if ('ontouchstart' in window) { | |
cb17fed8 BA |
1025 | // https://stackoverflow.com/a/42509310/12660887 |
1026 | document.addEventListener("touchstart", mousedown, {passive: false}); | |
1027 | document.addEventListener("touchmove", mousemove, {passive: false}); | |
1028 | document.addEventListener("touchend", mouseup, {passive: false}); | |
41534b92 | 1029 | } |
11625344 | 1030 | // TODO: onpointerdown/move/up ? See reveal.js /controllers/touch.js |
41534b92 BA |
1031 | } |
1032 | ||
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); | |
41534b92 BA |
1053 | this.playPlusVisual(m, r); |
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 | ||
1076 | ////////////// | |
1077 | // BASIC UTILS | |
1078 | ||
1079 | get size() { | |
15106e82 BA |
1080 | return { |
1081 | x: 8, | |
1082 | y: 8, | |
f55a0a67 | 1083 | ratio: 1 //for rectangular board = y / x (optional, 1 = default) |
15106e82 | 1084 | }; |
41534b92 BA |
1085 | } |
1086 | ||
1087 | // Color of thing on square (i,j). 'undefined' if square is empty | |
1088 | getColor(i, j) { | |
15106e82 BA |
1089 | if (typeof i == "string") |
1090 | return i; //reserves | |
41534b92 BA |
1091 | return this.board[i][j].charAt(0); |
1092 | } | |
1093 | ||
15106e82 | 1094 | static GetColorClass(c) { |
bc2bc396 BA |
1095 | if (c == 'w') |
1096 | return "white"; | |
1097 | if (c == 'b') | |
1098 | return "black"; | |
24872b22 | 1099 | return "other-color"; //unidentified color |
15106e82 BA |
1100 | } |
1101 | ||
cc2c7183 | 1102 | // Assume square i,j isn't empty |
41534b92 | 1103 | getPiece(i, j) { |
15106e82 BA |
1104 | if (typeof j == "string") |
1105 | return j; //reserves | |
41534b92 BA |
1106 | return this.board[i][j].charAt(1); |
1107 | } | |
1108 | ||
cc2c7183 | 1109 | // Piece type on square (i,j) |
65cf1690 BA |
1110 | getPieceType(i, j, p) { |
1111 | if (!p) | |
1112 | p = this.getPiece(i, j); | |
cc2c7183 BA |
1113 | return C.CannibalKings[p] || p; //a cannibal king move as... |
1114 | } | |
1115 | ||
41534b92 BA |
1116 | // Get opponent color |
1117 | static GetOppCol(color) { | |
1118 | return (color == "w" ? "b" : "w"); | |
1119 | } | |
1120 | ||
65cf1690 | 1121 | // Can thing on square1 capture (enemy) thing on square2? |
41534b92 | 1122 | canTake([x1, y1], [x2, y2]) { |
c9ab0340 | 1123 | return (this.getColor(x1, y1) !== this.getColor(x2, y2)); |
41534b92 BA |
1124 | } |
1125 | ||
1126 | // Is (x,y) on the chessboard? | |
1127 | onBoard(x, y) { | |
b99ce1fb BA |
1128 | return (x >= 0 && x < this.size.x && |
1129 | y >= 0 && y < this.size.y); | |
41534b92 BA |
1130 | } |
1131 | ||
15106e82 | 1132 | // Am I allowed to move thing at square x,y ? |
41534b92 | 1133 | canIplay(x, y) { |
0c44c676 | 1134 | return (this.playerColor == this.turn && this.getColor(x, y) == this.turn); |
41534b92 BA |
1135 | } |
1136 | ||
1137 | //////////////////////// | |
1138 | // PIECES SPECIFICATIONS | |
1139 | ||
c9ab0340 | 1140 | pieces(color, x, y) { |
41534b92 | 1141 | const pawnShift = (color == "w" ? -1 : 1); |
9db5050a BA |
1142 | // NOTE: jump 2 squares from first rank (pawns can be here sometimes) |
1143 | const initRank = ((color == 'w' && x >= 6) || (color == 'b' && x <= 1)); | |
41534b92 BA |
1144 | return { |
1145 | 'p': { | |
1146 | "class": "pawn", | |
c9ab0340 BA |
1147 | moves: [ |
1148 | { | |
1149 | steps: [[pawnShift, 0]], | |
1150 | range: (initRank ? 2 : 1) | |
1151 | } | |
1152 | ], | |
1153 | attack: [ | |
1154 | { | |
1155 | steps: [[pawnShift, 1], [pawnShift, -1]], | |
1156 | range: 1 | |
1157 | } | |
1158 | ] | |
41534b92 BA |
1159 | }, |
1160 | // rook | |
1161 | 'r': { | |
1162 | "class": "rook", | |
c9ab0340 BA |
1163 | moves: [ |
1164 | {steps: [[0, 1], [0, -1], [1, 0], [-1, 0]]} | |
1165 | ] | |
41534b92 BA |
1166 | }, |
1167 | // knight | |
1168 | 'n': { | |
1169 | "class": "knight", | |
c9ab0340 BA |
1170 | moves: [ |
1171 | { | |
1172 | steps: [ | |
1173 | [1, 2], [1, -2], [-1, 2], [-1, -2], | |
1174 | [2, 1], [-2, 1], [2, -1], [-2, -1] | |
1175 | ], | |
1176 | range: 1 | |
1177 | } | |
1178 | ] | |
41534b92 BA |
1179 | }, |
1180 | // bishop | |
1181 | 'b': { | |
1182 | "class": "bishop", | |
c9ab0340 BA |
1183 | moves: [ |
1184 | {steps: [[1, 1], [1, -1], [-1, 1], [-1, -1]]} | |
1185 | ] | |
41534b92 BA |
1186 | }, |
1187 | // queen | |
1188 | 'q': { | |
1189 | "class": "queen", | |
c9ab0340 BA |
1190 | moves: [ |
1191 | { | |
1192 | steps: [ | |
1193 | [0, 1], [0, -1], [1, 0], [-1, 0], | |
1194 | [1, 1], [1, -1], [-1, 1], [-1, -1] | |
1195 | ] | |
1196 | } | |
41534b92 BA |
1197 | ] |
1198 | }, | |
1199 | // king | |
1200 | 'k': { | |
1201 | "class": "king", | |
c9ab0340 BA |
1202 | moves: [ |
1203 | { | |
1204 | steps: [ | |
1205 | [0, 1], [0, -1], [1, 0], [-1, 0], | |
1206 | [1, 1], [1, -1], [-1, 1], [-1, -1] | |
1207 | ], | |
1208 | range: 1 | |
1209 | } | |
1210 | ] | |
cc2c7183 BA |
1211 | }, |
1212 | // Cannibal kings: | |
c9ab0340 BA |
1213 | '!': {"class": "king-pawn", moveas: "p"}, |
1214 | '#': {"class": "king-rook", moveas: "r"}, | |
1215 | '$': {"class": "king-knight", moveas: "n"}, | |
1216 | '%': {"class": "king-bishop", moveas: "b"}, | |
1217 | '*': {"class": "king-queen", moveas: "q"} | |
41534b92 BA |
1218 | }; |
1219 | } | |
1220 | ||
41534b92 BA |
1221 | //////////////////// |
1222 | // MOVES GENERATION | |
1223 | ||
adf7c659 BA |
1224 | // For Cylinder: get Y coordinate |
1225 | getY(y) { | |
b4ae3ff6 BA |
1226 | if (!this.options["cylinder"]) |
1227 | return y; | |
41534b92 | 1228 | let res = y % this.size.y; |
b4ae3ff6 | 1229 | if (res < 0) |
adf7c659 | 1230 | res += this.size.y; |
41534b92 BA |
1231 | return res; |
1232 | } | |
1233 | ||
1234 | // Stop at the first capture found | |
1235 | atLeastOneCapture(color) { | |
1236 | color = color || this.turn; | |
cc2c7183 | 1237 | const oppCol = C.GetOppCol(color); |
41534b92 BA |
1238 | for (let i = 0; i < this.size.x; i++) { |
1239 | for (let j = 0; j < this.size.y; j++) { | |
1240 | if (this.board[i][j] != "" && this.getColor(i, j) == color) { | |
c9ab0340 BA |
1241 | const allSpecs = this.pieces(color, i, j) |
1242 | let specs = allSpecs[this.getPieceType(i, j)]; | |
65cf1690 BA |
1243 | if (specs.moveas) |
1244 | specs = allSpecs[specs.moveas]; | |
c9ab0340 BA |
1245 | const attacks = specs.attack || specs.moves; |
1246 | for (let a of attacks) { | |
1247 | outerLoop: for (let step of a.steps) { | |
d262cff4 | 1248 | let [ii, jj] = [i + step[0], this.getY(j + step[1])]; |
c9ab0340 BA |
1249 | let stepCounter = 1; |
1250 | while (this.onBoard(ii, jj) && this.board[ii][jj] == "") { | |
1251 | if (a.range <= stepCounter++) | |
1252 | continue outerLoop; | |
1253 | ii += step[0]; | |
d262cff4 | 1254 | jj = this.getY(jj + step[1]); |
c9ab0340 BA |
1255 | } |
1256 | if ( | |
1257 | this.onBoard(ii, jj) && | |
1258 | this.getColor(ii, jj) == oppCol && | |
1259 | this.filterValid( | |
1260 | [this.getBasicMove([i, j], [ii, jj])] | |
1261 | ).length >= 1 | |
1262 | ) { | |
1263 | return true; | |
1264 | } | |
41534b92 BA |
1265 | } |
1266 | } | |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | return false; | |
1271 | } | |
1272 | ||
1273 | getDropMovesFrom([c, p]) { | |
1274 | // NOTE: by design, this.reserve[c][p] >= 1 on user click | |
1a7c0492 | 1275 | // (but not necessarily otherwise: atLeastOneMove() etc) |
b4ae3ff6 BA |
1276 | if (this.reserve[c][p] == 0) |
1277 | return []; | |
41534b92 BA |
1278 | let moves = []; |
1279 | for (let i=0; i<this.size.x; i++) { | |
1280 | for (let j=0; j<this.size.y; j++) { | |
41534b92 BA |
1281 | if ( |
1282 | this.board[i][j] == "" && | |
c9ab0340 | 1283 | (!this.enlightened || this.enlightened[i][j]) && |
41534b92 | 1284 | ( |
cc2c7183 | 1285 | p != "p" || |
41534b92 BA |
1286 | (c == 'w' && i < this.size.x - 1) || |
1287 | (c == 'b' && i > 0) | |
1288 | ) | |
1289 | ) { | |
1290 | moves.push( | |
1291 | new Move({ | |
1292 | start: {x: c, y: p}, | |
1293 | end: {x: i, y: j}, | |
1294 | appear: [new PiPo({x: i, y: j, c: c, p: p})], | |
1295 | vanish: [] | |
1296 | }) | |
1297 | ); | |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | return moves; | |
1302 | } | |
1303 | ||
1304 | // All possible moves from selected square | |
c7bf7b1b | 1305 | getPotentialMovesFrom(sq, color) { |
8b301184 BA |
1306 | if (this.subTurnTeleport == 2) |
1307 | return []; | |
b4ae3ff6 BA |
1308 | if (typeof sq[0] == "string") |
1309 | return this.getDropMovesFrom(sq); | |
57b8015b | 1310 | if (this.isImmobilized(sq)) |
b4ae3ff6 | 1311 | return []; |
cc2c7183 | 1312 | const piece = this.getPieceType(sq[0], sq[1]); |
c9ab0340 BA |
1313 | let moves = this.getPotentialMovesOf(piece, sq); |
1314 | if ( | |
1315 | piece == "p" && | |
1316 | this.hasEnpassant && | |
1317 | this.epSquare | |
1318 | ) { | |
1319 | Array.prototype.push.apply(moves, this.getEnpassantCaptures(sq)); | |
1320 | } | |
41534b92 | 1321 | if ( |
cc2c7183 | 1322 | piece == "k" && |
41534b92 BA |
1323 | this.hasCastle && |
1324 | this.castleFlags[color || this.turn].some(v => v < this.size.y) | |
1325 | ) { | |
1326 | Array.prototype.push.apply(moves, this.getCastleMoves(sq)); | |
1327 | } | |
1328 | return this.postProcessPotentialMoves(moves); | |
1329 | } | |
1330 | ||
1331 | postProcessPotentialMoves(moves) { | |
b4ae3ff6 BA |
1332 | if (moves.length == 0) |
1333 | return []; | |
41534b92 | 1334 | const color = this.getColor(moves[0].start.x, moves[0].start.y); |
cc2c7183 | 1335 | const oppCol = C.GetOppCol(color); |
41534b92 | 1336 | |
57b8015b BA |
1337 | if (this.options["capture"] && this.atLeastOneCapture()) |
1338 | moves = this.capturePostProcess(moves, oppCol); | |
41534b92 | 1339 | |
57b8015b BA |
1340 | if (this.options["atomic"]) |
1341 | this.atomicPostProcess(moves, oppCol); | |
cc2c7183 | 1342 | |
c9ab0340 BA |
1343 | if ( |
1344 | moves.length > 0 && | |
1345 | this.getPieceType(moves[0].start.x, moves[0].start.y) == "p" | |
1346 | ) { | |
57b8015b | 1347 | this.pawnPostProcess(moves, color, oppCol); |
c9ab0340 BA |
1348 | } |
1349 | ||
cc2c7183 BA |
1350 | if ( |
1351 | this.options["cannibal"] && | |
57b8015b | 1352 | this.options["rifle"] |
cc2c7183 BA |
1353 | ) { |
1354 | // In this case a rifle-capture from last rank may promote a pawn | |
9db5050a | 1355 | this.riflePromotePostProcess(moves, color); |
57b8015b BA |
1356 | } |
1357 | ||
1358 | return moves; | |
1359 | } | |
1360 | ||
1361 | capturePostProcess(moves, oppCol) { | |
1362 | // Filter out non-capturing moves (not using m.vanish because of | |
1363 | // self captures of Recycle and Teleport). | |
1364 | return moves.filter(m => { | |
1365 | return ( | |
1366 | this.board[m.end.x][m.end.y] != "" && | |
1367 | this.getColor(m.end.x, m.end.y) == oppCol | |
1368 | ); | |
1369 | }); | |
1370 | } | |
1371 | ||
1372 | atomicPostProcess(moves, oppCol) { | |
1373 | moves.forEach(m => { | |
1374 | if ( | |
1375 | this.board[m.end.x][m.end.y] != "" && | |
1376 | this.getColor(m.end.x, m.end.y) == oppCol | |
1377 | ) { | |
1378 | // Explosion! | |
1379 | let steps = [ | |
1380 | [-1, -1], | |
1381 | [-1, 0], | |
1382 | [-1, 1], | |
1383 | [0, -1], | |
1384 | [0, 1], | |
1385 | [1, -1], | |
1386 | [1, 0], | |
1387 | [1, 1] | |
1388 | ]; | |
1389 | for (let step of steps) { | |
1390 | let x = m.end.x + step[0]; | |
d262cff4 | 1391 | let y = this.getY(m.end.y + step[1]); |
57b8015b BA |
1392 | if ( |
1393 | this.onBoard(x, y) && | |
1394 | this.board[x][y] != "" && | |
1395 | this.getPieceType(x, y) != "p" | |
1396 | ) { | |
1397 | m.vanish.push( | |
1398 | new PiPo({ | |
1399 | p: this.getPiece(x, y), | |
1400 | c: this.getColor(x, y), | |
1401 | x: x, | |
1402 | y: y | |
1403 | }) | |
1404 | ); | |
1405 | } | |
1406 | } | |
1407 | if (!this.options["rifle"]) | |
0c44c676 | 1408 | m.appear.pop(); //nothing appears |
57b8015b BA |
1409 | } |
1410 | }); | |
1411 | } | |
1412 | ||
1413 | pawnPostProcess(moves, color, oppCol) { | |
1414 | let moreMoves = []; | |
1415 | const lastRank = (color == "w" ? 0 : this.size.x - 1); | |
1416 | const initPiece = this.getPiece(moves[0].start.x, moves[0].start.y); | |
1417 | moves.forEach(m => { | |
57b8015b BA |
1418 | const [x1, y1] = [m.start.x, m.start.y]; |
1419 | const [x2, y2] = [m.end.x, m.end.y]; | |
1420 | const promotionOk = ( | |
1421 | x2 == lastRank && | |
1422 | (!this.options["rifle"] || this.board[x2][y2] == "") | |
1423 | ); | |
1424 | if (!promotionOk) | |
1425 | return; //nothing to do | |
8cc2f6d0 BA |
1426 | if (this.options["pawnfall"]) { |
1427 | m.appear.shift(); | |
8cc2f6d0 BA |
1428 | return; |
1429 | } | |
99ea2453 BA |
1430 | let finalPieces = ["p"]; |
1431 | if ( | |
1432 | this.options["cannibal"] && | |
1433 | this.board[x2][y2] != "" && | |
1434 | this.getColor(x2, y2) == oppCol | |
1435 | ) { | |
1436 | finalPieces = [this.getPieceType(x2, y2)]; | |
1437 | } | |
1438 | else | |
1439 | finalPieces = this.pawnPromotions; | |
57b8015b BA |
1440 | m.appear[0].p = finalPieces[0]; |
1441 | if (initPiece == "!") //cannibal king-pawn | |
1442 | m.appear[0].p = C.CannibalKingCode[finalPieces[0]]; | |
1443 | for (let i=1; i<finalPieces.length; i++) { | |
1444 | const piece = finalPieces[i]; | |
99ea2453 BA |
1445 | const tr = { |
1446 | c: color, | |
1447 | p: (initPiece != "!" ? piece : C.CannibalKingCode[piece]) | |
1448 | }; | |
57b8015b | 1449 | let newMove = this.getBasicMove([x1, y1], [x2, y2], tr); |
57b8015b BA |
1450 | moreMoves.push(newMove); |
1451 | } | |
1452 | }); | |
1453 | Array.prototype.push.apply(moves, moreMoves); | |
1454 | } | |
cc2c7183 | 1455 | |
9db5050a | 1456 | riflePromotePostProcess(moves, color) { |
57b8015b BA |
1457 | const lastRank = (color == "w" ? 0 : this.size.x - 1); |
1458 | let newMoves = []; | |
1459 | moves.forEach(m => { | |
1460 | if ( | |
1461 | m.start.x == lastRank && | |
1462 | m.appear.length >= 1 && | |
1463 | m.appear[0].p == "p" && | |
1464 | m.appear[0].x == m.start.x && | |
1465 | m.appear[0].y == m.start.y | |
1466 | ) { | |
57b8015b BA |
1467 | m.appear[0].p = this.pawnPromotions[0]; |
1468 | for (let i=1; i<this.pawnPromotions.length; i++) { | |
1469 | let newMv = JSON.parse(JSON.stringify(m)); | |
1470 | newMv.appear[0].p = this.pawnSpecs.promotions[i]; | |
1471 | newMoves.push(newMv); | |
1472 | } | |
1473 | } | |
1474 | }); | |
1475 | Array.prototype.push.apply(moves, newMoves); | |
41534b92 BA |
1476 | } |
1477 | ||
b99ce1fb | 1478 | // NOTE: using special symbols to not interfere with variants' pieces codes |
cc2c7183 BA |
1479 | static get CannibalKings() { |
1480 | return { | |
b99ce1fb BA |
1481 | "!": "p", |
1482 | "#": "r", | |
1483 | "$": "n", | |
1484 | "%": "b", | |
6997e386 BA |
1485 | "*": "q", |
1486 | "k": "k" | |
cc2c7183 BA |
1487 | }; |
1488 | } | |
1489 | ||
1490 | static get CannibalKingCode() { | |
1491 | return { | |
b99ce1fb BA |
1492 | "p": "!", |
1493 | "r": "#", | |
1494 | "n": "$", | |
1495 | "b": "%", | |
1496 | "q": "*", | |
cc2c7183 BA |
1497 | "k": "k" |
1498 | }; | |
1499 | } | |
1500 | ||
1501 | isKing(symbol) { | |
6997e386 | 1502 | return !!C.CannibalKings[symbol]; |
cc2c7183 BA |
1503 | } |
1504 | ||
41534b92 BA |
1505 | // For Madrasi: |
1506 | // (redefined in Baroque etc, where Madrasi condition doesn't make sense) | |
1507 | isImmobilized([x, y]) { | |
57b8015b BA |
1508 | if (!this.options["madrasi"]) |
1509 | return false; | |
41534b92 | 1510 | const color = this.getColor(x, y); |
cc2c7183 | 1511 | const oppCol = C.GetOppCol(color); |
c9ab0340 | 1512 | const piece = this.getPieceType(x, y); //ok not cannibal king |
65cf1690 BA |
1513 | const allSpecs = this.pieces(color, x, y); |
1514 | let stepSpec = allSpecs[piece]; | |
1515 | if (stepSpec.moveas) | |
1516 | stepSpec = allSpecs[stepSpec.moveas]; | |
c9ab0340 BA |
1517 | const attacks = stepSpec.attack || stepSpec.moves; |
1518 | for (let a of attacks) { | |
1519 | outerLoop: for (let step of a.steps) { | |
1520 | let [i, j] = [x + step[0], y + step[1]]; | |
1521 | let stepCounter = 1; | |
1522 | while (this.onBoard(i, j) && this.board[i][j] == "") { | |
1523 | if (a.range <= stepCounter++) | |
1524 | continue outerLoop; | |
1525 | i += step[0]; | |
d262cff4 | 1526 | j = this.getY(j + step[1]); |
c9ab0340 BA |
1527 | } |
1528 | if ( | |
1529 | this.onBoard(i, j) && | |
1530 | this.getColor(i, j) == oppCol && | |
1531 | this.getPieceType(i, j) == piece | |
1532 | ) { | |
1533 | return true; | |
1534 | } | |
41534b92 BA |
1535 | } |
1536 | } | |
1537 | return false; | |
1538 | } | |
1539 | ||
65cf1690 | 1540 | canStepOver(i, j, p) { |
3b641716 BA |
1541 | // In some variants, objects on boards don't stop movement (Chakart) |
1542 | return this.board[i][j] == ""; | |
1543 | } | |
1544 | ||
41534b92 BA |
1545 | // Generic method to find possible moves of "sliding or jumping" pieces |
1546 | getPotentialMovesOf(piece, [x, y]) { | |
1547 | const color = this.getColor(x, y); | |
65cf1690 BA |
1548 | const apparentPiece = this.getPiece(x, y); //how it looks |
1549 | const allSpecs = this.pieces(color, x, y); | |
1550 | let stepSpec = allSpecs[piece]; | |
1551 | if (stepSpec.moveas) | |
1552 | stepSpec = allSpecs[stepSpec.moveas]; | |
41534b92 | 1553 | let moves = []; |
adf7c659 BA |
1554 | // Next 3 for Cylinder mode: |
1555 | let explored = {}; | |
1556 | let segments = []; | |
1557 | let segStart = []; | |
1558 | ||
1559 | const addMove = (start, end) => { | |
1560 | let newMove = this.getBasicMove(start, end); | |
1561 | if (segments.length > 0) { | |
1562 | newMove.segments = JSON.parse(JSON.stringify(segments)); | |
1563 | newMove.segments.push([[segStart[0], segStart[1]], [end[0], end[1]]]); | |
1564 | } | |
1565 | moves.push(newMove); | |
1566 | }; | |
c9ab0340 BA |
1567 | |
1568 | const findAddMoves = (type, stepArray) => { | |
1569 | for (let s of stepArray) { | |
1570 | outerLoop: for (let step of s.steps) { | |
adf7c659 BA |
1571 | segments = []; |
1572 | segStart = [x, y]; | |
d262cff4 BA |
1573 | let [i, j] = [x, y]; |
1574 | let stepCounter = 0; | |
1575 | while ( | |
1576 | this.onBoard(i, j) && | |
65cf1690 | 1577 | ((i == x && j == y) || this.canStepOver(i, j, apparentPiece)) |
d262cff4 BA |
1578 | ) { |
1579 | if ( | |
1580 | type != "attack" && | |
1581 | !explored[i + "." + j] && | |
1582 | (i != x || j != y) | |
1583 | ) { | |
c9ab0340 | 1584 | explored[i + "." + j] = true; |
adf7c659 | 1585 | addMove([x, y], [i, j]); |
c9ab0340 BA |
1586 | } |
1587 | if (s.range <= stepCounter++) | |
1588 | continue outerLoop; | |
d262cff4 | 1589 | const oldIJ = [i, j]; |
c9ab0340 | 1590 | i += step[0]; |
adf7c659 BA |
1591 | j = this.getY(j + step[1]); |
1592 | if (Math.abs(j - oldIJ[1]) > 1) { | |
d262cff4 | 1593 | // Boundary between segments (cylinder mode) |
adf7c659 BA |
1594 | segments.push([[segStart[0], segStart[1]], oldIJ]); |
1595 | segStart = [i, j]; | |
d262cff4 | 1596 | } |
c9ab0340 BA |
1597 | } |
1598 | if (!this.onBoard(i, j)) | |
1599 | continue; | |
1600 | const pieceIJ = this.getPieceType(i, j); | |
1601 | if ( | |
1602 | type != "moveonly" && | |
1603 | !explored[i + "." + j] && | |
1604 | ( | |
1605 | !this.options["zen"] || | |
1606 | pieceIJ == "k" | |
1607 | ) && | |
1608 | ( | |
1609 | this.canTake([x, y], [i, j]) || | |
1610 | ( | |
1611 | (this.options["recycle"] || this.options["teleport"]) && | |
1612 | pieceIJ != "k" | |
1613 | ) | |
1614 | ) | |
1615 | ) { | |
1616 | explored[i + "." + j] = true; | |
adf7c659 | 1617 | addMove([x, y], [i, j]); |
c9ab0340 BA |
1618 | } |
1619 | } | |
41534b92 | 1620 | } |
c9ab0340 BA |
1621 | }; |
1622 | ||
1623 | const specialAttack = !!stepSpec.attack; | |
1624 | if (specialAttack) | |
1625 | findAddMoves("attack", stepSpec.attack); | |
1626 | findAddMoves(specialAttack ? "moveonly" : "all", stepSpec.moves); | |
082e639a BA |
1627 | if (this.options["zen"]) { |
1628 | Array.prototype.push.apply(moves, | |
1629 | this.findCapturesOn([x, y], {zen: true})); | |
1630 | } | |
41534b92 BA |
1631 | return moves; |
1632 | } | |
1633 | ||
082e639a BA |
1634 | // Search for enemy (or not) pieces attacking [x, y] |
1635 | findCapturesOn([x, y], args) { | |
41534b92 | 1636 | let moves = []; |
082e639a BA |
1637 | if (!args.oppCol) |
1638 | args.oppCol = C.GetOppCol(this.getColor(x, y) || this.turn); | |
c9ab0340 BA |
1639 | for (let i=0; i<this.size.x; i++) { |
1640 | for (let j=0; j<this.size.y; j++) { | |
57b8015b BA |
1641 | if ( |
1642 | this.board[i][j] != "" && | |
082e639a | 1643 | this.getColor(i, j) == args.oppCol && |
57b8015b BA |
1644 | !this.isImmobilized([i, j]) |
1645 | ) { | |
082e639a | 1646 | if (args.zen && this.isKing(this.getPiece(i, j))) |
c9ab0340 | 1647 | continue; //king not captured in this way |
65cf1690 BA |
1648 | const apparentPiece = this.getPiece(i, j); |
1649 | // Quick check: does this potential attacker target x,y ? | |
1650 | if (this.canStepOver(x, y, apparentPiece)) | |
1651 | continue; | |
1652 | const allSpecs = this.pieces(args.oppCol, i, j); | |
1653 | let stepSpec = allSpecs[this.getPieceType(i, j)]; | |
1654 | if (stepSpec.moveas) | |
1655 | stepSpec = allSpecs[stepSpec.moveas]; | |
c9ab0340 BA |
1656 | const attacks = stepSpec.attack || stepSpec.moves; |
1657 | for (let a of attacks) { | |
1658 | for (let s of a.steps) { | |
1659 | // Quick check: if step isn't compatible, don't even try | |
57b8015b | 1660 | if (!C.CompatibleStep([i, j], [x, y], s, a.range)) |
c9ab0340 BA |
1661 | continue; |
1662 | // Finally verify that nothing stand in-between | |
d262cff4 | 1663 | let [ii, jj] = [i + s[0], this.getY(j + s[1])]; |
c9ab0340 | 1664 | let stepCounter = 1; |
082e639a BA |
1665 | while ( |
1666 | this.onBoard(ii, jj) && | |
1667 | this.board[ii][jj] == "" && | |
1668 | (ii != x || jj != y) //condition to attack empty squares too | |
1669 | ) { | |
c9ab0340 | 1670 | ii += s[0]; |
d262cff4 | 1671 | jj = this.getY(jj + s[1]); |
c9ab0340 BA |
1672 | } |
1673 | if (ii == x && jj == y) { | |
082e639a BA |
1674 | if (args.zen) |
1675 | // Reverse capture: | |
1676 | moves.push(this.getBasicMove([x, y], [i, j])); | |
1677 | else | |
1678 | moves.push(this.getBasicMove([i, j], [x, y])); | |
1679 | if (args.one) | |
c9ab0340 BA |
1680 | return moves; //test for underCheck |
1681 | } | |
1682 | } | |
1683 | } | |
41534b92 | 1684 | } |
c9ab0340 BA |
1685 | } |
1686 | } | |
41534b92 BA |
1687 | return moves; |
1688 | } | |
1689 | ||
57b8015b BA |
1690 | static CompatibleStep([x1, y1], [x2, y2], step, range) { |
1691 | const rx = (x2 - x1) / step[0], | |
1692 | ry = (y2 - y1) / step[1]; | |
1693 | if ( | |
1694 | (!Number.isFinite(rx) && !Number.isNaN(rx)) || | |
1695 | (!Number.isFinite(ry) && !Number.isNaN(ry)) | |
1696 | ) { | |
1697 | return false; | |
1698 | } | |
1699 | let distance = (Number.isNaN(rx) ? ry : rx); | |
1700 | // TODO: 1e-7 here is totally arbitrary | |
1701 | if (Math.abs(distance - Math.round(distance)) > 1e-7) | |
1702 | return false; | |
1703 | distance = Math.round(distance); //in case of (numerical...) | |
1704 | if (range < distance) | |
1705 | return false; | |
1706 | return true; | |
1707 | } | |
1708 | ||
41534b92 BA |
1709 | // Build a regular move from its initial and destination squares. |
1710 | // tr: transformation | |
1711 | getBasicMove([sx, sy], [ex, ey], tr) { | |
1712 | const initColor = this.getColor(sx, sy); | |
cc2c7183 | 1713 | const initPiece = this.getPiece(sx, sy); |
41534b92 BA |
1714 | const destColor = (this.board[ex][ey] != "" ? this.getColor(ex, ey) : ""); |
1715 | let mv = new Move({ | |
1716 | appear: [], | |
1717 | vanish: [], | |
15106e82 BA |
1718 | start: {x: sx, y: sy}, |
1719 | end: {x: ex, y: ey} | |
41534b92 BA |
1720 | }); |
1721 | if ( | |
1722 | !this.options["rifle"] || | |
1723 | this.board[ex][ey] == "" || | |
1724 | destColor == initColor //Recycle, Teleport | |
1725 | ) { | |
1726 | mv.appear = [ | |
1727 | new PiPo({ | |
1728 | x: ex, | |
1729 | y: ey, | |
1730 | c: !!tr ? tr.c : initColor, | |
1731 | p: !!tr ? tr.p : initPiece | |
1732 | }) | |
1733 | ]; | |
1734 | mv.vanish = [ | |
1735 | new PiPo({ | |
1736 | x: sx, | |
1737 | y: sy, | |
1738 | c: initColor, | |
1739 | p: initPiece | |
1740 | }) | |
1741 | ]; | |
1742 | } | |
1743 | if (this.board[ex][ey] != "") { | |
1744 | mv.vanish.push( | |
1745 | new PiPo({ | |
1746 | x: ex, | |
1747 | y: ey, | |
1748 | c: this.getColor(ex, ey), | |
cc2c7183 | 1749 | p: this.getPiece(ex, ey) |
41534b92 BA |
1750 | }) |
1751 | ); | |
41534b92 BA |
1752 | if (this.options["cannibal"] && destColor != initColor) { |
1753 | const lastIdx = mv.vanish.length - 1; | |
cc2c7183 BA |
1754 | let trPiece = mv.vanish[lastIdx].p; |
1755 | if (this.isKing(this.getPiece(sx, sy))) | |
1756 | trPiece = C.CannibalKingCode[trPiece]; | |
b4ae3ff6 BA |
1757 | if (mv.appear.length >= 1) |
1758 | mv.appear[0].p = trPiece; | |
41534b92 BA |
1759 | else if (this.options["rifle"]) { |
1760 | mv.appear.unshift( | |
1761 | new PiPo({ | |
1762 | x: sx, | |
1763 | y: sy, | |
1764 | c: initColor, | |
cc2c7183 | 1765 | p: trPiece |
41534b92 BA |
1766 | }) |
1767 | ); | |
1768 | mv.vanish.unshift( | |
1769 | new PiPo({ | |
1770 | x: sx, | |
1771 | y: sy, | |
1772 | c: initColor, | |
1773 | p: initPiece | |
1774 | }) | |
1775 | ); | |
1776 | } | |
1777 | } | |
1778 | } | |
1779 | return mv; | |
1780 | } | |
1781 | ||
1782 | // En-passant square, if any | |
1783 | getEpSquare(moveOrSquare) { | |
1784 | if (typeof moveOrSquare === "string") { | |
1785 | const square = moveOrSquare; | |
b4ae3ff6 BA |
1786 | if (square == "-") |
1787 | return undefined; | |
cc2c7183 | 1788 | return C.SquareToCoords(square); |
41534b92 BA |
1789 | } |
1790 | // Argument is a move: | |
1791 | const move = moveOrSquare; | |
1792 | const s = move.start, | |
1793 | e = move.end; | |
1794 | if ( | |
1795 | s.y == e.y && | |
1796 | Math.abs(s.x - e.x) == 2 && | |
1797 | // Next conditions for variants like Atomic or Rifle, Recycle... | |
65cf1690 BA |
1798 | ( |
1799 | move.appear.length > 0 && | |
1800 | this.getPieceType(0, 0, move.appear[0].p) == "p" | |
1801 | ) | |
1802 | && | |
1803 | ( | |
1804 | move.vanish.length > 0 && | |
1805 | this.getPieceType(0, 0, move.vanish[0].p) == "p" | |
1806 | ) | |
41534b92 BA |
1807 | ) { |
1808 | return { | |
1809 | x: (s.x + e.x) / 2, | |
1810 | y: s.y | |
1811 | }; | |
1812 | } | |
1813 | return undefined; //default | |
1814 | } | |
1815 | ||
1816 | // Special case of en-passant captures: treated separately | |
c9ab0340 | 1817 | getEnpassantCaptures([x, y]) { |
41534b92 | 1818 | const color = this.getColor(x, y); |
c9ab0340 | 1819 | const shiftX = (color == 'w' ? -1 : 1); |
cc2c7183 | 1820 | const oppCol = C.GetOppCol(color); |
41534b92 BA |
1821 | let enpassantMove = null; |
1822 | if ( | |
1823 | !!this.epSquare && | |
1824 | this.epSquare.x == x + shiftX && | |
d262cff4 | 1825 | Math.abs(this.getY(this.epSquare.y - y)) == 1 && |
41534b92 BA |
1826 | this.getColor(x, this.epSquare.y) == oppCol //Doublemove guard... |
1827 | ) { | |
1828 | const [epx, epy] = [this.epSquare.x, this.epSquare.y]; | |
1829 | this.board[epx][epy] = oppCol + "p"; | |
1830 | enpassantMove = this.getBasicMove([x, y], [epx, epy]); | |
1831 | this.board[epx][epy] = ""; | |
1832 | const lastIdx = enpassantMove.vanish.length - 1; //think Rifle | |
1833 | enpassantMove.vanish[lastIdx].x = x; | |
1834 | } | |
1835 | return !!enpassantMove ? [enpassantMove] : []; | |
1836 | } | |
1837 | ||
41534b92 BA |
1838 | // "castleInCheck" arg to let some variants castle under check |
1839 | getCastleMoves([x, y], finalSquares, castleInCheck, castleWith) { | |
1840 | const c = this.getColor(x, y); | |
1841 | ||
1842 | // Castling ? | |
cc2c7183 | 1843 | const oppCol = C.GetOppCol(c); |
41534b92 BA |
1844 | let moves = []; |
1845 | // King, then rook: | |
1846 | finalSquares = | |
1847 | finalSquares || [ [2, 3], [this.size.y - 2, this.size.y - 3] ]; | |
cc2c7183 | 1848 | const castlingKing = this.getPiece(x, y); |
41534b92 BA |
1849 | castlingCheck: for ( |
1850 | let castleSide = 0; | |
1851 | castleSide < 2; | |
1852 | castleSide++ //large, then small | |
1853 | ) { | |
b4ae3ff6 BA |
1854 | if (this.castleFlags[c][castleSide] >= this.size.y) |
1855 | continue; | |
41534b92 BA |
1856 | // If this code is reached, rook and king are on initial position |
1857 | ||
1858 | // NOTE: in some variants this is not a rook | |
1859 | const rookPos = this.castleFlags[c][castleSide]; | |
cc2c7183 | 1860 | const castlingPiece = this.getPiece(x, rookPos); |
41534b92 BA |
1861 | if ( |
1862 | this.board[x][rookPos] == "" || | |
1863 | this.getColor(x, rookPos) != c || | |
1864 | (!!castleWith && !castleWith.includes(castlingPiece)) | |
1865 | ) { | |
1866 | // Rook is not here, or changed color (see Benedict) | |
1867 | continue; | |
1868 | } | |
1869 | // Nothing on the path of the king ? (and no checks) | |
1870 | const finDist = finalSquares[castleSide][0] - y; | |
1871 | let step = finDist / Math.max(1, Math.abs(finDist)); | |
1872 | let i = y; | |
1873 | do { | |
1874 | if ( | |
1875 | (!castleInCheck && this.underCheck([x, i], oppCol)) || | |
1876 | ( | |
1877 | this.board[x][i] != "" && | |
1878 | // NOTE: next check is enough, because of chessboard constraints | |
1879 | (this.getColor(x, i) != c || ![rookPos, y].includes(i)) | |
1880 | ) | |
1881 | ) { | |
1882 | continue castlingCheck; | |
1883 | } | |
1884 | i += step; | |
1885 | } while (i != finalSquares[castleSide][0]); | |
1886 | // Nothing on the path to the rook? | |
1887 | step = (castleSide == 0 ? -1 : 1); | |
1888 | for (i = y + step; i != rookPos; i += step) { | |
b4ae3ff6 BA |
1889 | if (this.board[x][i] != "") |
1890 | continue castlingCheck; | |
41534b92 BA |
1891 | } |
1892 | ||
1893 | // Nothing on final squares, except maybe king and castling rook? | |
1894 | for (i = 0; i < 2; i++) { | |
1895 | if ( | |
1896 | finalSquares[castleSide][i] != rookPos && | |
1897 | this.board[x][finalSquares[castleSide][i]] != "" && | |
1898 | ( | |
1899 | finalSquares[castleSide][i] != y || | |
1900 | this.getColor(x, finalSquares[castleSide][i]) != c | |
1901 | ) | |
1902 | ) { | |
1903 | continue castlingCheck; | |
1904 | } | |
1905 | } | |
1906 | ||
1907 | // If this code is reached, castle is valid | |
1908 | moves.push( | |
1909 | new Move({ | |
1910 | appear: [ | |
1911 | new PiPo({ | |
1912 | x: x, | |
1913 | y: finalSquares[castleSide][0], | |
1914 | p: castlingKing, | |
1915 | c: c | |
1916 | }), | |
1917 | new PiPo({ | |
1918 | x: x, | |
1919 | y: finalSquares[castleSide][1], | |
1920 | p: castlingPiece, | |
1921 | c: c | |
1922 | }) | |
1923 | ], | |
1924 | vanish: [ | |
1925 | // King might be initially disguised (Titan...) | |
1926 | new PiPo({ x: x, y: y, p: castlingKing, c: c }), | |
1927 | new PiPo({ x: x, y: rookPos, p: castlingPiece, c: c }) | |
1928 | ], | |
1929 | end: | |
1930 | Math.abs(y - rookPos) <= 2 | |
c9ab0340 BA |
1931 | ? {x: x, y: rookPos} |
1932 | : {x: x, y: y + 2 * (castleSide == 0 ? -1 : 1)} | |
41534b92 BA |
1933 | }) |
1934 | ); | |
1935 | } | |
1936 | ||
1937 | return moves; | |
1938 | } | |
1939 | ||
1940 | //////////////////// | |
1941 | // MOVES VALIDATION | |
1942 | ||
082e639a BA |
1943 | // Is (king at) given position under check by "oppCol" ? |
1944 | underCheck([x, y], oppCol) { | |
b4ae3ff6 BA |
1945 | if (this.options["taking"] || this.options["dark"]) |
1946 | return false; | |
082e639a BA |
1947 | return ( |
1948 | this.findCapturesOn([x, y], {oppCol: oppCol, one: true}).length >= 1 | |
1949 | ); | |
41534b92 BA |
1950 | } |
1951 | ||
1952 | // Stop at first king found (TODO: multi-kings) | |
1953 | searchKingPos(color) { | |
1954 | for (let i=0; i < this.size.x; i++) { | |
1955 | for (let j=0; j < this.size.y; j++) { | |
cc2c7183 BA |
1956 | if (this.getColor(i, j) == color && this.isKing(this.getPiece(i, j))) |
1957 | return [i, j]; | |
41534b92 BA |
1958 | } |
1959 | } | |
1960 | return [-1, -1]; //king not found | |
1961 | } | |
1962 | ||
f5435757 BA |
1963 | // Some variants (e.g. Refusal) may need to check opponent moves too |
1964 | filterValid(moves, color) { | |
b4ae3ff6 BA |
1965 | if (moves.length == 0) |
1966 | return []; | |
f5435757 BA |
1967 | if (!color) |
1968 | color = this.turn; | |
cc2c7183 | 1969 | const oppCol = C.GetOppCol(color); |
41534b92 BA |
1970 | if (this.options["balance"] && [1, 3].includes(this.movesCount)) { |
1971 | // Forbid moves either giving check or exploding opponent's king: | |
1972 | const oppKingPos = this.searchKingPos(oppCol); | |
1973 | moves = moves.filter(m => { | |
1974 | if ( | |
cc2c7183 BA |
1975 | m.vanish.some(v => v.c == oppCol && v.p == "k") && |
1976 | m.appear.every(a => a.c != oppCol || a.p != "k") | |
41534b92 BA |
1977 | ) |
1978 | return false; | |
1979 | this.playOnBoard(m); | |
1980 | const res = !this.underCheck(oppKingPos, color); | |
1981 | this.undoOnBoard(m); | |
1982 | return res; | |
1983 | }); | |
1984 | } | |
b4ae3ff6 BA |
1985 | if (this.options["taking"] || this.options["dark"]) |
1986 | return moves; | |
41534b92 BA |
1987 | const kingPos = this.searchKingPos(color); |
1988 | let filtered = {}; //avoid re-checking similar moves (promotions...) | |
1989 | return moves.filter(m => { | |
1990 | const key = m.start.x + m.start.y + '.' + m.end.x + m.end.y; | |
1991 | if (!filtered[key]) { | |
1992 | this.playOnBoard(m); | |
1993 | let square = kingPos, | |
1994 | res = true; //a priori valid | |
cc2c7183 | 1995 | if (m.vanish.some(v => { |
65cf1690 | 1996 | return this.isKing(v.p) && v.c == color; |
cc2c7183 | 1997 | })) { |
41534b92 BA |
1998 | // Search king in appear array: |
1999 | const newKingIdx = | |
cc2c7183 | 2000 | m.appear.findIndex(a => { |
65cf1690 | 2001 | return this.isKing(a.p) && a.c == color; |
cc2c7183 | 2002 | }); |
41534b92 BA |
2003 | if (newKingIdx >= 0) |
2004 | square = [m.appear[newKingIdx].x, m.appear[newKingIdx].y]; | |
b4ae3ff6 BA |
2005 | else |
2006 | res = false; | |
41534b92 BA |
2007 | } |
2008 | res &&= !this.underCheck(square, oppCol); | |
2009 | this.undoOnBoard(m); | |
2010 | filtered[key] = res; | |
2011 | return res; | |
2012 | } | |
2013 | return filtered[key]; | |
2014 | }); | |
2015 | } | |
2016 | ||
2017 | ///////////////// | |
2018 | // MOVES PLAYING | |
2019 | ||
2020 | // Aggregate flags into one object | |
2021 | aggregateFlags() { | |
2022 | return this.castleFlags; | |
2023 | } | |
2024 | ||
2025 | // Reverse operation | |
2026 | disaggregateFlags(flags) { | |
2027 | this.castleFlags = flags; | |
2028 | } | |
2029 | ||
2030 | // Apply a move on board | |
2031 | playOnBoard(move) { | |
6997e386 BA |
2032 | for (let psq of move.vanish) |
2033 | this.board[psq.x][psq.y] = ""; | |
2034 | for (let psq of move.appear) | |
2035 | this.board[psq.x][psq.y] = psq.c + psq.p; | |
41534b92 BA |
2036 | } |
2037 | // Un-apply the played move | |
2038 | undoOnBoard(move) { | |
6997e386 BA |
2039 | for (let psq of move.appear) |
2040 | this.board[psq.x][psq.y] = ""; | |
2041 | for (let psq of move.vanish) | |
2042 | this.board[psq.x][psq.y] = psq.c + psq.p; | |
41534b92 BA |
2043 | } |
2044 | ||
2045 | updateCastleFlags(move) { | |
2046 | // Update castling flags if start or arrive from/at rook/king locations | |
2047 | move.appear.concat(move.vanish).forEach(psq => { | |
2048 | if ( | |
2049 | this.board[psq.x][psq.y] != "" && | |
cc2c7183 | 2050 | this.getPieceType(psq.x, psq.y) == "k" |
41534b92 BA |
2051 | ) { |
2052 | this.castleFlags[psq.c] = [this.size.y, this.size.y]; | |
2053 | } | |
2054 | // NOTE: not "else if" because king can capture enemy rook... | |
cc2c7183 | 2055 | let c = ""; |
b4ae3ff6 BA |
2056 | if (psq.x == 0) |
2057 | c = "b"; | |
2058 | else if (psq.x == this.size.x - 1) | |
2059 | c = "w"; | |
cc2c7183 | 2060 | if (c != "") { |
41534b92 | 2061 | const fidx = this.castleFlags[c].findIndex(f => f == psq.y); |
b4ae3ff6 BA |
2062 | if (fidx >= 0) |
2063 | this.castleFlags[c][fidx] = this.size.y; | |
41534b92 BA |
2064 | } |
2065 | }); | |
2066 | } | |
2067 | ||
2068 | prePlay(move) { | |
2069 | if ( | |
99ea2453 BA |
2070 | this.hasCastle && |
2071 | // If flags already off, no need to re-check: | |
2072 | Object.keys(this.castleFlags).some(c => { | |
2073 | return this.castleFlags[c].some(val => val < this.size.y)}) | |
41534b92 | 2074 | ) { |
99ea2453 BA |
2075 | this.updateCastleFlags(move); |
2076 | } | |
2077 | if (this.options["crazyhouse"]) { | |
2078 | move.vanish.forEach(v => { | |
2079 | const square = C.CoordsToSquare({x: v.x, y: v.y}); | |
2080 | if (this.ispawn[square]) | |
2081 | delete this.ispawn[square]; | |
2082 | }); | |
2083 | if (move.appear.length > 0 && move.vanish.length > 0) { | |
2084 | // Assumption: something is moving | |
2085 | const initSquare = C.CoordsToSquare(move.start); | |
f429756d | 2086 | const destSquare = C.CoordsToSquare(move.end); |
99ea2453 BA |
2087 | if ( |
2088 | this.ispawn[initSquare] || | |
2089 | (move.vanish[0].p == "p" && move.appear[0].p != "p") | |
41534b92 | 2090 | ) { |
f429756d BA |
2091 | this.ispawn[destSquare] = true; |
2092 | } | |
2093 | else if ( | |
2094 | this.ispawn[destSquare] && | |
2095 | this.getColor(move.end.x, move.end.y) != move.vanish[0].c | |
2096 | ) { | |
2097 | move.vanish[1].p = "p"; | |
2098 | delete this.ispawn[destSquare]; | |
41534b92 BA |
2099 | } |
2100 | } | |
2101 | } | |
2102 | const minSize = Math.min(move.appear.length, move.vanish.length); | |
0c44c676 BA |
2103 | if ( |
2104 | this.hasReserve && | |
2105 | // Warning; atomic pawn removal isn't a capture | |
2106 | (!this.options["atomic"] || !this.rempawn || this.movesCount >= 1) | |
2107 | ) { | |
41534b92 BA |
2108 | const color = this.turn; |
2109 | for (let i=minSize; i<move.appear.length; i++) { | |
2110 | // Something appears = dropped on board (some exceptions, Chakart...) | |
0c44c676 BA |
2111 | if (move.appear[i].c == color) { |
2112 | const piece = move.appear[i].p; | |
2113 | this.updateReserve(color, piece, this.reserve[color][piece] - 1); | |
2114 | } | |
41534b92 BA |
2115 | } |
2116 | for (let i=minSize; i<move.vanish.length; i++) { | |
2117 | // Something vanish: add to reserve except if recycle & opponent | |
0c44c676 BA |
2118 | if ( |
2119 | this.options["crazyhouse"] || | |
2120 | (this.options["recycle"] && move.vanish[i].c == color) | |
2121 | ) { | |
2122 | const piece = move.vanish[i].p; | |
41534b92 | 2123 | this.updateReserve(color, piece, this.reserve[color][piece] + 1); |
0c44c676 | 2124 | } |
41534b92 BA |
2125 | } |
2126 | } | |
2127 | } | |
2128 | ||
2129 | play(move) { | |
2130 | this.prePlay(move); | |
b4ae3ff6 BA |
2131 | if (this.hasEnpassant) |
2132 | this.epSquare = this.getEpSquare(move); | |
41534b92 BA |
2133 | this.playOnBoard(move); |
2134 | this.postPlay(move); | |
2135 | } | |
2136 | ||
2137 | postPlay(move) { | |
2138 | const color = this.turn; | |
cc2c7183 | 2139 | const oppCol = C.GetOppCol(color); |
b4ae3ff6 | 2140 | if (this.options["dark"]) |
c9ab0340 | 2141 | this.updateEnlightened(); |
41534b92 BA |
2142 | if (this.options["teleport"]) { |
2143 | if ( | |
cc2c7183 | 2144 | this.subTurnTeleport == 1 && |
41534b92 BA |
2145 | move.vanish.length > move.appear.length && |
2146 | move.vanish[move.vanish.length - 1].c == color | |
2147 | ) { | |
2148 | const v = move.vanish[move.vanish.length - 1]; | |
2149 | this.captured = {x: v.x, y: v.y, c: v.c, p: v.p}; | |
cc2c7183 | 2150 | this.subTurnTeleport = 2; |
41534b92 BA |
2151 | return; |
2152 | } | |
cc2c7183 | 2153 | this.subTurnTeleport = 1; |
41534b92 BA |
2154 | this.captured = null; |
2155 | } | |
5f08c59b BA |
2156 | if ( |
2157 | ( | |
2158 | this.options["doublemove"] && | |
2159 | this.movesCount >= 1 && | |
2160 | this.subTurn == 1 | |
2161 | ) || | |
2162 | (this.options["progressive"] && this.subTurn <= this.movesCount) | |
2163 | ) { | |
2164 | const oppKingPos = this.searchKingPos(oppCol); | |
41534b92 | 2165 | if ( |
5f08c59b | 2166 | oppKingPos[0] >= 0 && |
41534b92 | 2167 | ( |
5f08c59b BA |
2168 | this.options["taking"] || |
2169 | !this.underCheck(oppKingPos, color) | |
2170 | ) | |
41534b92 | 2171 | ) { |
5f08c59b BA |
2172 | this.subTurn++; |
2173 | return; | |
41534b92 | 2174 | } |
5f08c59b BA |
2175 | } |
2176 | if (this.isLastMove(move)) { | |
41534b92 | 2177 | this.turn = oppCol; |
5f08c59b BA |
2178 | this.movesCount++; |
2179 | this.subTurn = 1; | |
41534b92 | 2180 | } |
5f08c59b BA |
2181 | } |
2182 | ||
2183 | isLastMove(move) { | |
2184 | return ( | |
2185 | (this.options["balance"] && ![1, 3].includes(this.movesCount)) || | |
2186 | !move.next | |
2187 | ); | |
41534b92 BA |
2188 | } |
2189 | ||
2190 | // "Stop at the first move found" | |
2191 | atLeastOneMove(color) { | |
2192 | color = color || this.turn; | |
2193 | for (let i = 0; i < this.size.x; i++) { | |
2194 | for (let j = 0; j < this.size.y; j++) { | |
2195 | if (this.board[i][j] != "" && this.getColor(i, j) == color) { | |
cc2c7183 BA |
2196 | // NOTE: in fact searching for all potential moves from i,j. |
2197 | // I don't believe this is an issue, for now at least. | |
41534b92 | 2198 | const moves = this.getPotentialMovesFrom([i, j]); |
b4ae3ff6 BA |
2199 | if (moves.some(m => this.filterValid([m]).length >= 1)) |
2200 | return true; | |
41534b92 BA |
2201 | } |
2202 | } | |
2203 | } | |
2204 | if (this.hasReserve && this.reserve[color]) { | |
2205 | for (let p of Object.keys(this.reserve[color])) { | |
2206 | const moves = this.getDropMovesFrom([color, p]); | |
b4ae3ff6 BA |
2207 | if (moves.some(m => this.filterValid([m]).length >= 1)) |
2208 | return true; | |
41534b92 BA |
2209 | } |
2210 | } | |
2211 | return false; | |
2212 | } | |
2213 | ||
2214 | // What is the score ? (Interesting if game is over) | |
2215 | getCurrentScore(move) { | |
2216 | const color = this.turn; | |
cc2c7183 | 2217 | const oppCol = C.GetOppCol(color); |
41534b92 | 2218 | const kingPos = [this.searchKingPos(color), this.searchKingPos(oppCol)]; |
b4ae3ff6 BA |
2219 | if (kingPos[0][0] < 0 && kingPos[1][0] < 0) |
2220 | return "1/2"; | |
2221 | if (kingPos[0][0] < 0) | |
2222 | return (color == "w" ? "0-1" : "1-0"); | |
2223 | if (kingPos[1][0] < 0) | |
2224 | return (color == "w" ? "1-0" : "0-1"); | |
2225 | if (this.atLeastOneMove()) | |
2226 | return "*"; | |
41534b92 | 2227 | // No valid move: stalemate or checkmate? |
c9ab0340 | 2228 | if (!this.underCheck(kingPos[0], color)) |
b4ae3ff6 | 2229 | return "1/2"; |
41534b92 BA |
2230 | // OK, checkmate |
2231 | return (color == "w" ? "0-1" : "1-0"); | |
2232 | } | |
2233 | ||
41534b92 BA |
2234 | playVisual(move, r) { |
2235 | move.vanish.forEach(v => { | |
f77da909 | 2236 | this.g_pieces[v.x][v.y].remove(); |
c9ab0340 | 2237 | this.g_pieces[v.x][v.y] = null; |
41534b92 | 2238 | }); |
3c61449b BA |
2239 | let chessboard = |
2240 | document.getElementById(this.containerId).querySelector(".chessboard"); | |
b4ae3ff6 BA |
2241 | if (!r) |
2242 | r = chessboard.getBoundingClientRect(); | |
41534b92 BA |
2243 | const pieceWidth = this.getPieceWidth(r.width); |
2244 | move.appear.forEach(a => { | |
41534b92 | 2245 | this.g_pieces[a.x][a.y] = document.createElement("piece"); |
2159c239 BA |
2246 | C.AddClass_es(this.g_pieces[a.x][a.y], |
2247 | this.pieces(a.c, a.x, a.y)[a.p]["class"]); | |
bc2bc396 | 2248 | this.g_pieces[a.x][a.y].classList.add(C.GetColorClass(a.c)); |
41534b92 BA |
2249 | this.g_pieces[a.x][a.y].style.width = pieceWidth + "px"; |
2250 | this.g_pieces[a.x][a.y].style.height = pieceWidth + "px"; | |
2251 | const [ip, jp] = this.getPixelPosition(a.x, a.y, r); | |
9db5050a BA |
2252 | // Translate coordinates to use chessboard as reference: |
2253 | this.g_pieces[a.x][a.y].style.transform = | |
2254 | `translate(${ip - r.x}px,${jp - r.y}px)`; | |
c9ab0340 BA |
2255 | if (this.enlightened && !this.enlightened[a.x][a.y]) |
2256 | this.g_pieces[a.x][a.y].classList.add("hidden"); | |
3c61449b | 2257 | chessboard.appendChild(this.g_pieces[a.x][a.y]); |
41534b92 | 2258 | }); |
c9ab0340 BA |
2259 | if (this.options["dark"]) |
2260 | this.graphUpdateEnlightened(); | |
41534b92 BA |
2261 | } |
2262 | ||
2263 | playPlusVisual(move, r) { | |
5f08c59b BA |
2264 | if (this.hasMoveStack) |
2265 | this.buildMoveStack(move); | |
2266 | else { | |
2267 | this.play(move); | |
2268 | this.playVisual(move, r); | |
2269 | this.afterPlay(move, this.turn, {send: true, res: true}); //user method | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | // TODO: send stack receive stack, or allow incremental? (good/bad points) | |
2274 | buildMoveStack(move) { | |
2275 | this.moveStack.push(move); | |
2276 | this.computeNextMove(move); | |
41534b92 | 2277 | this.play(move); |
5f08c59b BA |
2278 | const newTurn = this.turn; |
2279 | if (this.moveStack.length == 1) { | |
2280 | this.playVisual(move); | |
2281 | this.gameState = { | |
2282 | fen: this.getFen(), | |
2283 | board: JSON.parse(JSON.stringify(this.board)) //easier | |
2284 | }; | |
2285 | } | |
2286 | if (move.next) | |
2287 | this.buildMoveStack(move.next); | |
2288 | else { | |
2289 | // Send, animate + play until here | |
2290 | if (this.moveStack.length == 1) { | |
2291 | this.afterPlay(this.moveStack, newTurn, {send: true, res: true}); | |
2292 | this.moveStack = [] | |
2293 | } | |
2294 | else { | |
2295 | this.afterPlay(this.moveStack, newTurn, {send: true, res: false}); | |
2296 | this.re_initFromFen(this.gameState.fen, this.gameState.board); | |
2297 | this.playReceivedMove(this.moveStack.slice(1), () => { | |
2298 | this.afterPlay(this.moveStack, newTurn, {send: false, res: true}); | |
2299 | this.moveStack = [] | |
2300 | }); | |
2301 | } | |
2302 | } | |
41534b92 BA |
2303 | } |
2304 | ||
5f08c59b BA |
2305 | // Implemented in variants using (automatic) moveStack |
2306 | computeNextMove(move) {} | |
2307 | ||
f55a0a67 | 2308 | getMaxDistance(r) { |
15106e82 | 2309 | // Works for all rectangular boards: |
f55a0a67 | 2310 | return Math.sqrt(r.width ** 2 + r.height ** 2); |
15106e82 BA |
2311 | } |
2312 | ||
2313 | getDomPiece(x, y) { | |
2314 | return (typeof x == "string" ? this.r_pieces : this.g_pieces)[x][y]; | |
41534b92 BA |
2315 | } |
2316 | ||
5f08c59b BA |
2317 | animateMoving(start, end, drag, segments, cb) { |
2318 | let initPiece = this.getDomPiece(start.x, start.y); | |
2319 | // NOTE: cloning often not required, but light enough, and simpler | |
9db5050a BA |
2320 | let movingPiece = initPiece.cloneNode(); |
2321 | initPiece.style.opacity = "0"; | |
2322 | let container = | |
2323 | document.getElementById(this.containerId) | |
2324 | const r = container.querySelector(".chessboard").getBoundingClientRect(); | |
5f08c59b | 2325 | if (typeof start.x == "string") { |
082e639a BA |
2326 | // Need to bound width/height (was 100% for reserve pieces) |
2327 | const pieceWidth = this.getPieceWidth(r.width); | |
2328 | movingPiece.style.width = pieceWidth + "px"; | |
2329 | movingPiece.style.height = pieceWidth + "px"; | |
2330 | } | |
f55a0a67 | 2331 | const maxDist = this.getMaxDistance(r); |
5f08c59b BA |
2332 | const apparentColor = this.getColor(start.x, start.y); |
2333 | const pieces = this.pieces(apparentColor, start.x, start.y); | |
2334 | if (drag) { | |
2335 | const startCode = this.getPiece(start.x, start.y); | |
3b641716 | 2336 | C.RemoveClass_es(movingPiece, pieces[startCode]["class"]); |
5f08c59b BA |
2337 | C.AddClass_es(movingPiece, pieces[drag.p]["class"]); |
2338 | if (apparentColor != drag.c) { | |
15106e82 | 2339 | movingPiece.classList.remove(C.GetColorClass(apparentColor)); |
5f08c59b | 2340 | movingPiece.classList.add(C.GetColorClass(drag.c)); |
41534b92 | 2341 | } |
41534b92 | 2342 | } |
9db5050a | 2343 | container.appendChild(movingPiece); |
15106e82 | 2344 | const animateSegment = (index, cb) => { |
9db5050a | 2345 | // NOTE: move.drag could be generalized per-segment (usage?) |
5f08c59b BA |
2346 | const [i1, j1] = segments[index][0]; |
2347 | const [i2, j2] = segments[index][1]; | |
15106e82 BA |
2348 | const dep = this.getPixelPosition(i1, j1, r); |
2349 | const arr = this.getPixelPosition(i2, j2, r); | |
9db5050a BA |
2350 | movingPiece.style.transitionDuration = "0s"; |
2351 | movingPiece.style.transform = `translate(${dep[0]}px, ${dep[1]}px)`; | |
15106e82 BA |
2352 | const distance = |
2353 | Math.sqrt((arr[0] - dep[0]) ** 2 + (arr[1] - dep[1]) ** 2); | |
2354 | const duration = 0.2 + (distance / maxDist) * 0.3; | |
9db5050a BA |
2355 | // TODO: unclear why we need this new delay below: |
2356 | setTimeout(() => { | |
2357 | movingPiece.style.transitionDuration = duration + "s"; | |
adf7c659 | 2358 | // movingPiece is child of container: no need to adjust coordinates |
9db5050a BA |
2359 | movingPiece.style.transform = `translate(${arr[0]}px, ${arr[1]}px)`; |
2360 | setTimeout(cb, duration * 1000); | |
2361 | }, 50); | |
15106e82 | 2362 | }; |
15106e82 | 2363 | let index = 0; |
635418a5 | 2364 | const animateSegmentCallback = () => { |
5f08c59b | 2365 | if (index < segments.length) |
635418a5 | 2366 | animateSegment(index++, animateSegmentCallback); |
15106e82 | 2367 | else { |
9db5050a BA |
2368 | movingPiece.remove(); |
2369 | initPiece.style.opacity = "1"; | |
5f08c59b | 2370 | cb(); |
15106e82 | 2371 | } |
635418a5 BA |
2372 | }; |
2373 | animateSegmentCallback(); | |
41534b92 BA |
2374 | } |
2375 | ||
5f08c59b BA |
2376 | // Input array of objects with at least fields x,y (e.g. PiPo) |
2377 | animateFading(arr, cb) { | |
2378 | const animLength = 350; //TODO: 350ms? More? Less? | |
2379 | arr.forEach(v => { | |
2380 | let fadingPiece = this.getDomPiece(v.x, v.y); | |
2381 | fadingPiece.style.transitionDuration = (animLength / 1000) + "s"; | |
2382 | fadingPiece.style.opacity = "0"; | |
2383 | }); | |
2384 | setTimeout(cb, animLength); | |
2385 | } | |
2386 | ||
2387 | animate(move, callback) { | |
2388 | if (this.noAnimate || move.noAnimate) { | |
2389 | callback(); | |
2390 | return; | |
2391 | } | |
2392 | let segments = move.segments; | |
2393 | if (!segments) | |
2394 | segments = [ [[move.start.x, move.start.y], [move.end.x, move.end.y]] ]; | |
2395 | let targetObj = new TargetObj(callback); | |
2396 | if (move.start.x != move.end.x || move.start.y != move.end.y) { | |
2397 | targetObj.target++; | |
2398 | this.animateMoving(move.start, move.end, move.drag, segments, | |
2399 | () => targetObj.increment()); | |
2400 | } | |
2401 | if (move.vanish.length > move.appear.length) { | |
2402 | const arr = move.vanish.slice(move.appear.length) | |
2403 | .filter(v => v.x != move.end.x || v.y != move.end.y); | |
2404 | if (arr.length > 0) { | |
2405 | targetObj.target++; | |
2406 | this.animateFading(arr, () => targetObj.increment()); | |
2407 | } | |
2408 | } | |
2409 | targetObj.target += | |
2410 | this.customAnimate(move, segments, () => targetObj.increment()); | |
2411 | if (targetObj.target == 0) | |
2412 | callback(); | |
2413 | } | |
2414 | ||
2415 | // Potential other animations (e.g. for Suction variant) | |
2416 | customAnimate(move, segments, cb) { | |
2417 | return 0; //nb of targets | |
2418 | } | |
2419 | ||
41534b92 | 2420 | playReceivedMove(moves, callback) { |
21e8e712 | 2421 | const launchAnimation = () => { |
3c61449b | 2422 | const r = container.querySelector(".chessboard").getBoundingClientRect(); |
21e8e712 BA |
2423 | const animateRec = i => { |
2424 | this.animate(moves[i], () => { | |
21e8e712 | 2425 | this.play(moves[i]); |
57b8015b | 2426 | this.playVisual(moves[i], r); |
b4ae3ff6 BA |
2427 | if (i < moves.length - 1) |
2428 | setTimeout(() => animateRec(i+1), 300); | |
2429 | else | |
2430 | callback(); | |
21e8e712 BA |
2431 | }); |
2432 | }; | |
2433 | animateRec(0); | |
2434 | }; | |
e081c5eb BA |
2435 | // Delay if user wasn't focused: |
2436 | const checkDisplayThenAnimate = (delay) => { | |
3c61449b | 2437 | if (container.style.display == "none") { |
21e8e712 BA |
2438 | alert("New move! Let's go back to game..."); |
2439 | document.getElementById("gameInfos").style.display = "none"; | |
3c61449b | 2440 | container.style.display = "block"; |
21e8e712 BA |
2441 | setTimeout(launchAnimation, 700); |
2442 | } | |
b4ae3ff6 BA |
2443 | else |
2444 | setTimeout(launchAnimation, delay || 0); | |
21e8e712 | 2445 | }; |
3c61449b | 2446 | let container = document.getElementById(this.containerId); |
016306e3 BA |
2447 | if (document.hidden) { |
2448 | document.onvisibilitychange = () => { | |
2449 | document.onvisibilitychange = undefined; | |
e081c5eb | 2450 | checkDisplayThenAnimate(700); |
fd31883b | 2451 | }; |
fd31883b | 2452 | } |
b4ae3ff6 BA |
2453 | else |
2454 | checkDisplayThenAnimate(); | |
41534b92 BA |
2455 | } |
2456 | ||
2457 | }; |