hg/html~demo: chess/src/main/java/org/apidesign/html/demo/chess/BoardModel.java@cea2063fd0f9

     1 /**

     2  * The MIT License (MIT)

     3  *

     4  * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     5  *

     6  * Permission is hereby granted, free of charge, to any person obtaining a copy

     7  * of this software and associated documentation files (the "Software"), to deal

     8  * in the Software without restriction, including without limitation the rights

     9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

    10  * copies of the Software, and to permit persons to whom the Software is

    11  * furnished to do so, subject to the following conditions:

    12  *

    13  * The above copyright notice and this permission notice shall be included in

    14  * all copies or substantial portions of the Software.

    15  *

    16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

    17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

    18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

    19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

    20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

    21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

    22  * THE SOFTWARE.

    23  */

    24 package org.apidesign.html.demo.chess;

    26 import java.util.Arrays;

    27 import java.util.Collections;

    28 import java.util.List;

    29 import java.util.Timer;

    30 import java.util.TimerTask;

    31 import net.java.html.json.ComputedProperty;

    32 import net.java.html.json.Function;

    33 import net.java.html.json.Model;

    34 import net.java.html.json.ModelOperation;

    35 import net.java.html.json.OnPropertyChange;

    36 import net.java.html.json.Property;

    37 import net.java.html.sound.AudioClip;

    39 @Model(className="Board", properties={

    40     @Property(name = "player", type = String.class),

    41     @Property(name = "gameId", type = String.class),

    42     @Property(name = "whitePlayer", type = String.class),

    43     @Property(name = "blackPlayer", type = String.class),

    44     @Property(name = "alertMessage", type = String.class),

    45     @Property(name = "status", type = String.class),

    46     @Property(name = "rows", type = Row.class, array = true),

    47     @Property(name = "turn", type = Color.class),

    48     @Property(name = "moves", type = Move.class, array = true),

    49     @Property(name = "pendingMove", type = Move.class),

    50     @Property(name = "active", type = boolean.class),

    51 })

    52 public class BoardModel {

    53     @ComputedProperty static String title(String status, String gameId) {

    54         String t = status != null ? status : gameId;

    55         if (t != null && t.length() > 10) {

    56             return t.substring(0, 10);

    57         }

    58         return t;

    59     }

    61     @ModelOperation static void updateSummary(Board b, String summary) {

    62         if (summary != null) {

    63             b.setStatus(summary);

    64         }

    65     }

    67     private static final AudioClip MOVE = AudioClip.create("sounds/move.mp3");

    68     @OnPropertyChange("moves") static void playMove() {

    69         MOVE.play();

    70     }

    72     private static final AudioClip CHECK = AudioClip.create("sounds/check.mp3");

    73     private static final AudioClip CHECKMATE = AudioClip.create("sounds/checkmate.mp3");

    75     @Function static void selected(Board b, Square data) {

    76         Square previoslySelected = findSelectedSquare(b);

    77         if (previoslySelected == null) {

    78             if (data.getPiece() != null && data.getPieceColor() == b.getTurn()) {

    79                 data.setSelected(true);

    80                 Rules.computeAccessible(b, data);

    81             }

    82         } else {

    83             if (previoslySelected == data) {

    84                 data.setSelected(false);

    85                 Rules.computeAccessible(b, null);

    86                 return;

    87             }

    88             if (data.getPiece() != null && data.getPieceColor() == previoslySelected.getPieceColor()) {

    89                 previoslySelected.setSelected(false);

    90                 data.setSelected(true);

    91                 Rules.computeAccessible(b, data);

    92                 return;

    93             }

    94             if (data.isAccessible()) {

    95                 previoslySelected.setSelected(false);

    97                 Move newMove = new Move();

    98                 newMove.setFrom(previoslySelected.getPosition());

    99                 newMove.setTo(data.getPosition());

   100                 newMove.setRound(b.getMoves().size() / 2 + 1);

   101                 newMove.setPiece(previoslySelected.getPiece());

   102                 newMove.setTurn(previoslySelected.getPieceColor());

   103                 newMove.setTakes(data.getPiece() != null);

   104                 b.getMoves().add(newMove);

   105                 b.setPendingMove(newMove);

   107                 if (PieceType.KING == previoslySelected.getPiece() && previoslySelected.getX() == 'E' && previoslySelected.getY() == 1 || previoslySelected.getY() == 8) {

   108                     if (data.getX() == 'G') {

   109                         movePieceFromTo(

   110                             findSquare(b, 'F', data.getY()),

   111                             findSquare(b, 'H', data.getY())

   112                         );

   113                     } else if (data.getX() == 'C') {

   114                         movePieceFromTo(

   115                             findSquare(b, 'D', data.getY()),

   116                             findSquare(b, 'A', data.getY())

   117                         );

   118                     }

   119                 }

   120                 movePieceFromTo(data, previoslySelected);

   121                 b.setTurn(b.getTurn() == Color.W ? Color.B : Color.W);

   122                 Rules.computeAccessible(b, null);

   123             }

   124         }

   125     }

   127     private static void movePieceFromTo(Square newSquare, Square oldSquare) {

   128         newSquare.setPieceColor(oldSquare.getPieceColor());

   129         newSquare.setPiece(oldSquare.getPiece());

   130         oldSquare.setPiece(null);

   131         oldSquare.setPieceColor(null);

   132     }

   134     static class NextMove extends TimerTask {

   135         private static final Timer T = new Timer("Animate moves");

   136         private final Board b;

   137         private final Move m;

   139         public NextMove(Board b, Move m) {

   140             this.b = b;

   141             this.m = m;

   142             T.schedule(this, 1000);

   143         }

   146         @Override

   147         public void run() {

   148             b.showPosition(m);

   149         }

   150     }

   152     @ModelOperation @Function static void showPosition(Board b, Move data) {

   153         Rules.initBoard(b);

   154         boolean found = false;

   155         for (Move m : b.getMoves()) {

   156             if (found) {

   157                 b.setTurn(null);

   158                 new NextMove(b, m);

   159                 return;

   160             }

   161             Square from = findSquare(b, (char)m.getFrom().getX(), m.getFrom().getY());

   162             Square to = findSquare(b, (char)m.getTo().getX(), m.getTo().getY());

   163             to.setPiece(from.getPiece());

   164             to.setPieceColor(from.getPieceColor());

   165             from.setPiece(null);

   166             from.setPieceColor(null);

   167             if (m == data) {

   168                 found = true;

   169             }

   170         }

   171         b.setTurn(b.getMoves().size() % 2 == 0 ? Color.W : Color.B);

   172     }

   176     @Function static void rotateBoard(Board b) {

   177         Collections.reverse(b.getRows());

   178         for (Row r : b.getRows()) {

   179             Collections.reverse(r.getColumns());

   180         }

   181         Square sq = findSelectedSquare(b);

   182         if (sq != null) {

   183             sq.setSelected(false);

   184             Rules.computeAccessible(b, null);

   185         }

   186     }

   188     @ComputedProperty static boolean whiteTurn(Color turn) {

   189         return turn == Color.W;

   190     }

   192     @ComputedProperty static boolean blackTurn(Color turn) {

   193         return turn == Color.B;

   194     }

   196     @ComputedProperty static List<String> columnNames(List<Row> rows) {

   197         boolean whiteDown = rows.isEmpty() || rows.get(0).getY() == 8;

   198         String[] arr = new String[8];

   199         for (int i = 0; i < 8; i++) {

   200             String s;

   201             if (whiteDown) {

   202                 s = "" + (char)('A' + i);

   203             } else {

   204                 s = "" + (char)('H' - i);

   205             }

   206             arr[i] = s;

   207         }

   208         return Arrays.asList(arr);

   209     }

   211     static Square findSquare(Board b, char column, int row) {

   212         for (Row r : b.getRows()) {

   213             for (Square square : r.getColumns()) {

   214                 if (square.getPosition().getX() == column && square.getPosition().getY() == row) {

   215                     return square;

   216                 }

   217             }

   218         }

   219         return null;

   220     }

   222     private static Square findSquare(Board b, Position to) {

   223         return findSquare(b, (char)to.getX(), to.getY());

   224     }

   226     static Square findSelectedSquare(Board b) {

   227         for (Row row : b.getRows()) {

   228             for (Square square : row.getColumns()) {

   229                 if (square.isSelected()) {

   230                     return square;

   231                 }

   232             }

   233         }

   234         return null;

   235     }

   237     static void moveUpdate(

   238         final Board b, final Move move,

   239         final List<String> whites, final List<String> blacks,

   240         final Color turn, Object alert

   241     ) {

   242         final Square from = BoardModel.findSquare(b, move.getFrom());

   243         final Square to = BoardModel.findSquare(b, move.getTo());

   244         move.setPiece(from.getPiece());

   245         move.setTurn(from.getPieceColor());

   246         if (to.getPiece() != null) {

   247             move.setTakes(true);

   248         }

   249         move.setRound(b.getMoves().size() / 2 + 1);

   250         b.getMoves().add(move);

   251         Rules.initBoard(b, whites, blacks, turn);

   252     }

   254     @Model(className="Row", properties = {

   255         @Property(name = "columns", type = Square.class, array = true)

   256     })

   257     static class RowsImpl {

   258         @ComputedProperty static int y(List<Square> columns) {

   259             return columns.isEmpty() ? 0 : columns.get(0).getY();

   260         }

   261     }

   263     enum PieceType {

   264         PAWN(5), ROCK(2), KNIGHT(4), BISHOP(3), QUEEN(1), KING(0);

   266         final int entityIndex;

   268         PieceType(int ei) {

   269             this.entityIndex = ei;

   270         }

   272         static PieceType fromNotation(char notation) {

   273             switch (notation) {

   274                 case 'R': return ROCK;

   275                 case 'N': return KNIGHT;

   276                 case 'B': return BISHOP;

   277                 case 'Q': return QUEEN;

   278                 case 'K': return KING;

   279                 case 'P': return PAWN;

   280             }

   281             throw new IllegalStateException("Unexpected: " + notation);

   282         }

   284         String computeEntity(Color color) {

   285             if (color == null) {

   286                 color = Color.W;

   287             }

   288             int base;

   289             switch (color) {

   290                 case W: base = 12; break;

   291                 case B: base = 18; break;

   292                 default:

   293                     throw new AssertionError();

   294             }

   295             return "&#98" + String.valueOf(base + entityIndex) + ";";

   296         }

   297     }

   299     @Model(className="Position", properties = {

   300         @Property(name = "x", type = char.class),

   301         @Property(name = "y", type = int.class),

   302     })

   303     static class PositionImpl {

   304         @ComputedProperty static String location(int x, int y) {

   305             return "" + (char)(x - 'A' + 'a') + y;

   306         }

   307     }

   309     @Model(className="Square", properties = {

   310         @Property(name = "position", type = Position.class),

   311         @Property(name = "color", type = Color.class),

   312         @Property(name = "piece", type = PieceType.class),

   313         @Property(name = "pieceColor", type = Color.class),

   314         @Property(name = "selected", type = boolean.class),

   315         @Property(name = "accessible", type = boolean.class),

   316     })

   317     static class SquareModel {

   318         @ComputedProperty static String pieceEntity(

   319             PieceType piece, Color pieceColor

   320         ) {

   321             if (piece == null) {

   322                 return "";

   323             }

   324             return piece.computeEntity(pieceColor);

   325         }

   327         @ComputedProperty static String squareColor(

   328             Color color, boolean selected, boolean accessible

   329         ) {

   330             if (selected) {

   331                 return "selected";

   332             }

   333             if (accessible) {

   334                 return "accessible";

   335             }

   337             if (color == null) {

   338                 return "";

   339             } else {

   340                 if (color == Color.W) {

   341                     return "white";

   342                 } else {

   343                     return "black";

   344                 }

   345             }

   346         }

   348         @ComputedProperty static char x(Position position) {

   349             return position == null ? 'A' : position.getX();

   350         }

   352         @ComputedProperty static int y(Position position) {

   353             return position == null ? 1 : position.getY();

   354         }

   355     }

   357     @Model(className = "Move", properties = {

   358         @Property(name = "round", type = int.class),

   359         @Property(name = "turn", type = Color.class),

   360         @Property(name = "piece", type = PieceType.class),

   361         @Property(name = "from", type = Position.class),

   362         @Property(name = "to", type = Position.class),

   363         @Property(name = "promoted", type = PieceType.class),

   364         @Property(name = "takes", type = boolean.class),

   365         @Property(name = "check", type = boolean.class),

   366     })

   367     static class MoveImpl {

   368         @ComputedProperty static boolean whiteMove(Color turn) {

   369             return turn == Color.W;

   370         }

   372         @ComputedProperty static String html(

   373             Position from, Position to, boolean takes, PieceType piece, Color turn

   374         ) {

   375             if (from == null || to == null) {

   376                 return "";

   377             }

   378             StringBuilder sb = new StringBuilder();

   379             if (piece != null && piece != PieceType.PAWN) {

   380                 sb.append(piece.computeEntity(turn));

   381             }

   383             sb.append(from.getLocation());

   384             if (takes) {

   385                 sb.append("x");

   386             }

   387             sb.append(to.getLocation());

   388             return sb.toString();

   389         }

   391         static Move valueOf(String move) {

   392             move = move.toUpperCase();

   393             Move m = new Move();

   394             {

   395                 Position p = new Position();

   396                 p.setX(move.charAt(0));

   397                 p.setY(move.charAt(1) - '0');

   398                 m.setFrom(p);

   399             }

   400             {

   401                 Position p = new Position();

   402                 p.setX(move.charAt(2));

   403                 p.setY(move.charAt(3) - '0');

   404                 m.setTo(p);

   405             }

   406             return m;

   407         }

   408     }

   409 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Mon, 22 Nov 2021 15:58:31 +0100
changeset 244	cea2063fd0f9
parent 53	bc0094a5f88c
permissions	-rw-r--r--