Some more refactoring.
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					 4 changed files with 169 additions and 106 deletions
				
			
		|  | @ -1,14 +1,17 @@ | |||
| package ch.fritteli.labyrinth; | ||||
| 
 | ||||
| import io.vavr.control.Option; | ||||
| import lombok.Getter; | ||||
| import lombok.NonNull; | ||||
| 
 | ||||
| import java.util.Deque; | ||||
| import java.util.LinkedList; | ||||
| 
 | ||||
| public class Labyrinth { | ||||
|     final Tile[][] field; | ||||
|     private final Tile[][] field; | ||||
|     @Getter | ||||
|     private final int width; | ||||
|     @Getter | ||||
|     private final int height; | ||||
| 
 | ||||
|     public Labyrinth(final int width, final int height) { | ||||
|  | @ -41,34 +44,35 @@ public class Labyrinth { | |||
|     private void hardenWalls(@NonNull final Tile tile, final int x, final int y) { | ||||
|         if (x == 0) { | ||||
|             tile.preventDiggingToOrFrom(Direction.LEFT); | ||||
|         } else if (x == width - 1) { | ||||
|         } else if (x == this.width - 1) { | ||||
|             tile.preventDiggingToOrFrom(Direction.RIGHT); | ||||
|         } | ||||
|         if (y == 0) { | ||||
|             tile.preventDiggingToOrFrom(Direction.TOP); | ||||
|         } else if (y == height - 1) { | ||||
|         } else if (y == this.height - 1) { | ||||
|             tile.preventDiggingToOrFrom(Direction.BOTTOM); | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     private void generate() { | ||||
|         new Generator(); | ||||
|         new Generator().run(); | ||||
|     } | ||||
| 
 | ||||
|     public class Generator { | ||||
|     private class Generator { | ||||
|         private final Deque<Position> positions = new LinkedList<>(); | ||||
| 
 | ||||
|         Generator() { | ||||
|         void run() { | ||||
|             this.preDig(); | ||||
|             this.dig(); | ||||
|             this.postDig(); | ||||
|         } | ||||
| 
 | ||||
|         private void preDig() { | ||||
|             final Position bottomRight = new Position(Labyrinth.this.width - 1, Labyrinth.this.height - 1); | ||||
|             final Tile bottomRightTile = Labyrinth.this.getTileAt(bottomRight); | ||||
|             bottomRightTile.enableDiggingToOrFrom(Direction.BOTTOM); | ||||
|             bottomRightTile.digFrom(Direction.BOTTOM); | ||||
|             this.positions.push(bottomRight); | ||||
|             this.dig(); | ||||
|             final Position topLeft = new Position(0, 0); | ||||
|             final Tile topLeftTile = Labyrinth.this.getTileAt(topLeft); | ||||
|             topLeftTile.enableDiggingToOrFrom(Direction.TOP); | ||||
|             topLeftTile.digTo(Direction.TOP); | ||||
|         } | ||||
| 
 | ||||
|         private void dig() { | ||||
|  | @ -94,5 +98,12 @@ public class Labyrinth { | |||
|                 } | ||||
|             } | ||||
|         } | ||||
| 
 | ||||
|         private void postDig() { | ||||
|             final Position topLeft = new Position(0, 0); | ||||
|             final Tile topLeftTile = Labyrinth.this.getTileAt(topLeft); | ||||
|             topLeftTile.enableDiggingToOrFrom(Direction.TOP); | ||||
|             topLeftTile.digTo(Direction.TOP); | ||||
|         } | ||||
|     } | ||||
| } | ||||
|  |  | |||
|  | @ -1,33 +1,19 @@ | |||
| package ch.fritteli.labyrinth; | ||||
| 
 | ||||
| import lombok.Builder; | ||||
| import lombok.AccessLevel; | ||||
| import lombok.AllArgsConstructor; | ||||
| import lombok.NoArgsConstructor; | ||||
| import lombok.NonNull; | ||||
| import lombok.Value; | ||||
| import lombok.With; | ||||
| import lombok.experimental.FieldDefaults; | ||||
| import org.jetbrains.annotations.Nullable; | ||||
| 
 | ||||
| public class TextRenderer { | ||||
|     static final String HORIZONTAL = "\u2500"; | ||||
|     static final String VERTICAL = "\u2502"; | ||||
|     static final String LEFT = "\u2574"; | ||||
|     static final String UP = "\u2575"; | ||||
|     static final String RIGHT = "\u2576"; | ||||
|     static final String DOWN = "\u2577"; | ||||
|     static final String DOWN_RIGHT = "\u250c"; | ||||
|     static final String DOWN_LEFT = "\u2510"; | ||||
|     static final String UP_RIGHT = "\u2514"; | ||||
|     static final String UP_LEFT = "\u2518"; | ||||
|     static final String VERTICAL_RIGHT = "\u251c"; | ||||
|     static final String VERTICAL_LEFT = "\u2524"; | ||||
|     static final String HORIZONTAL_DOWN = "\u252c"; | ||||
|     static final String HORIZONTAL_UP = "\u2534"; | ||||
|     static final String CROSS = "\u253c"; | ||||
|     private final Labyrinth labyrinth; | ||||
|     private final int width; | ||||
|     private final int height; | ||||
|     private int x = 0; | ||||
|     private int y = 0; | ||||
|     private int border = 0; | ||||
|     private int line = 0; | ||||
| 
 | ||||
|     private TextRenderer(@NonNull final Labyrinth labyrinth, final int width, final int height) { | ||||
|         this.labyrinth = labyrinth; | ||||
|  | @ -36,11 +22,11 @@ public class TextRenderer { | |||
|     } | ||||
| 
 | ||||
|     public static String render(@NonNull final Labyrinth labyrinth) { | ||||
|         final int width = labyrinth.field.length; | ||||
|         final int width = labyrinth.getWidth(); | ||||
|         if (width == 0) { | ||||
|             return ""; | ||||
|         } | ||||
|         final int height = labyrinth.field[0].length; | ||||
|         final int height = labyrinth.getHeight(); | ||||
|         final TextRenderer renderer = new TextRenderer(labyrinth, width, height); | ||||
| 
 | ||||
|         final StringBuilder sb = new StringBuilder(); | ||||
|  | @ -54,135 +40,200 @@ public class TextRenderer { | |||
|         return this.y < this.height; | ||||
|     } | ||||
| 
 | ||||
|     private Tile getTileOrNull(final int x, final int y) { | ||||
|         if (x < 0 || y < 0 || x >= this.width || y >= this.height) { | ||||
|             return null; | ||||
|         } | ||||
|         return this.labyrinth.getTileAt(x, y); | ||||
|     } | ||||
| 
 | ||||
|     private String next() { | ||||
|         final Tile currentTile = this.labyrinth.getTileAt(this.x, this.y); | ||||
|         final Tile leftTile = this.x > 0 ? this.labyrinth.getTileAt(this.x - 1, this.y) : null; | ||||
|         final Tile topTile = this.y > 0 ? this.labyrinth.getTileAt(this.x, this.y - 1) : null; | ||||
|         String s = ""; | ||||
|         switch (this.border) { | ||||
|         final Tile leftTile = this.getTileOrNull(this.x - 1, this.y); | ||||
|         final Tile topTile = this.getTileOrNull(this.x, this.y - 1); | ||||
|         final String s; | ||||
|         switch (this.line) { | ||||
|             case 0: | ||||
|                 s = this.renderTop(currentTile, leftTile, topTile); | ||||
|                 s = this.renderTopLine(currentTile, leftTile, topTile); | ||||
|                 break; | ||||
|             case 1: | ||||
|                 s = this.renderCenter(currentTile); | ||||
|                 s = this.renderCenterLine(currentTile); | ||||
|                 break; | ||||
|             case 2: | ||||
|                 s = this.renderBottom(currentTile, leftTile); | ||||
|                 s = this.renderBottomLine(currentTile, leftTile); | ||||
|                 break; | ||||
|             default: | ||||
|                 s = ""; | ||||
|                 break; | ||||
|         } | ||||
|         // do some magic ... | ||||
|         this.x++; | ||||
|         if (this.x == this.width) { | ||||
|             this.x = 0; | ||||
|             this.border++; | ||||
|             this.line++; | ||||
|         } | ||||
|         if (this.border == 2 && this.y < this.height - 1) { | ||||
|             this.border = 0; | ||||
|         if (this.line == 2 && this.y < this.height - 1) { | ||||
|             this.line = 0; | ||||
|             this.y++; | ||||
|         } | ||||
|         if (this.border == 3) { | ||||
|             this.border = 0; | ||||
|         if (this.line == 3) { | ||||
|             this.line = 0; | ||||
|             this.y++; | ||||
|         } | ||||
|         return s; | ||||
|     } | ||||
| 
 | ||||
|     private String renderTop(@NonNull final Tile currentTile, @Nullable final Tile leftTile, @Nullable final Tile topTile) { | ||||
|         final CharDefinition.CharDefinitionBuilder builder1 = CharDefinition.builder(); | ||||
|         final CharDefinition.CharDefinitionBuilder builder2 = CharDefinition.builder(); | ||||
|         final CharDefinition.CharDefinitionBuilder builder3 = CharDefinition.builder(); | ||||
|     private String renderTopLine(@NonNull final Tile currentTile, @Nullable final Tile leftTile, @Nullable final Tile topTile) { | ||||
|         final CharDefinition charDef1 = new CharDefinition(); | ||||
|         final CharDefinition charDef2 = new CharDefinition(); | ||||
|         final CharDefinition charDef3 = new CharDefinition(); | ||||
|         String result; | ||||
|         if (currentTile.hasWallAt(Direction.LEFT)) { | ||||
|             builder1.down(true); | ||||
|             charDef1.down(); | ||||
|         } | ||||
|         if (currentTile.hasWallAt(Direction.TOP)) { | ||||
|             builder1.right(true); | ||||
|             builder2.left(true).right(true); | ||||
|             builder3.left(true); | ||||
|             charDef1.right(); | ||||
|             charDef2.horizontal(); | ||||
|             charDef3.left(); | ||||
|         } | ||||
|         if (currentTile.hasWallAt(Direction.RIGHT)) { | ||||
|             builder3.down(true); | ||||
|             charDef3.down(); | ||||
|         } | ||||
|         if (leftTile != null && leftTile.hasWallAt(Direction.TOP)) { | ||||
|             builder1.left(true); | ||||
|             charDef1.left(); | ||||
|         } | ||||
|         if (topTile != null) { | ||||
|             if (topTile.hasWallAt(Direction.LEFT)) { | ||||
|                 builder1.up(true); | ||||
|                 charDef1.up(); | ||||
|             } | ||||
|             if (topTile.hasWallAt(Direction.RIGHT)) { | ||||
|                 builder3.up(true); | ||||
|                 charDef3.up(); | ||||
|             } | ||||
|         } | ||||
|         result = builder1.build().toString() + builder2.build(); | ||||
|         result = charDef1.toString() + charDef2; | ||||
|         if (this.x == this.width - 1) { | ||||
|             result += builder3.build() + "\n"; | ||||
|             result += charDef3 + "\n"; | ||||
|         } | ||||
|         return result; | ||||
|     } | ||||
| 
 | ||||
|     private String renderCenter(@NonNull final Tile currentTile) { | ||||
|         final CharDefinition.CharDefinitionBuilder builder1 = CharDefinition.builder(); | ||||
|         final CharDefinition.CharDefinitionBuilder builder2 = CharDefinition.builder(); | ||||
|     private String renderCenterLine(@NonNull final Tile currentTile) { | ||||
|         final CharDefinition charDef1 = new CharDefinition(); | ||||
|         final CharDefinition charDef2 = new CharDefinition(); | ||||
|         String result; | ||||
|         if (currentTile.hasWallAt(Direction.LEFT)) { | ||||
|             builder1.up(true).down(true); | ||||
|             charDef1.vertical(); | ||||
|         } | ||||
|         if (currentTile.hasWallAt(Direction.RIGHT)) { | ||||
|             builder2.up(true).down(true); | ||||
|             charDef2.vertical(); | ||||
|         } | ||||
| 
 | ||||
|         result = builder1.build() + " "; | ||||
|         result = charDef1 + " "; | ||||
| 
 | ||||
|         if (this.x == this.width - 1) { | ||||
|             result += builder2.build() + "\n"; | ||||
|             result += charDef2 + "\n"; | ||||
|         } | ||||
| 
 | ||||
|         return result; | ||||
|     } | ||||
| 
 | ||||
|     private String renderBottom(@NonNull final Tile currentTile, @Nullable final Tile leftTile) { | ||||
|     private String renderBottomLine(@NonNull final Tile currentTile, @Nullable final Tile leftTile) { | ||||
|         String result; | ||||
|         final CharDefinition.CharDefinitionBuilder builder1 = CharDefinition.builder(); | ||||
|         final CharDefinition.CharDefinitionBuilder builder2 = CharDefinition.builder(); | ||||
|         final CharDefinition.CharDefinitionBuilder builder3 = CharDefinition.builder(); | ||||
|         final CharDefinition charDef1 = new CharDefinition(); | ||||
|         final CharDefinition charDef2 = new CharDefinition(); | ||||
|         final CharDefinition charDef3 = new CharDefinition(); | ||||
| 
 | ||||
|         if (currentTile.hasWallAt(Direction.LEFT)) { | ||||
|             builder1.up(true); | ||||
|             charDef1.up(); | ||||
|         } | ||||
|         if (currentTile.hasWallAt(Direction.BOTTOM)) { | ||||
|             builder1.right(true); | ||||
|             builder2.left(true).right(true); | ||||
|             builder3.left(true); | ||||
|             charDef1.right(); | ||||
|             charDef2.horizontal(); | ||||
|             charDef3.left(); | ||||
|         } | ||||
|         if (currentTile.hasWallAt(Direction.RIGHT)) { | ||||
|             builder3.up(true); | ||||
|             charDef3.up(); | ||||
|         } | ||||
|         if (leftTile != null && leftTile.hasWallAt(Direction.BOTTOM)) { | ||||
|             builder1.left(true); | ||||
|             charDef1.left(); | ||||
|         } | ||||
| 
 | ||||
|         result = builder1.build().toString() + builder2.build(); | ||||
|         result = charDef1.toString() + charDef2; | ||||
| 
 | ||||
|         if (this.x == this.width - 1) { | ||||
|             result += builder3.build(); | ||||
|             result += charDef3; | ||||
|         } | ||||
|         return result; | ||||
|     } | ||||
| 
 | ||||
|     @Value | ||||
|     @Builder | ||||
|     @With | ||||
|     @FieldDefaults(level = AccessLevel.PRIVATE) | ||||
|     @NoArgsConstructor | ||||
|     @AllArgsConstructor | ||||
|     static class CharDefinition { | ||||
|         @Builder.Default | ||||
|         // ─ | ||||
|         static final String HORIZONTAL = "\u2500"; | ||||
|         // │ | ||||
|         static final String VERTICAL = "\u2502"; | ||||
|         // ╴ | ||||
|         static final String LEFT = "\u2574"; | ||||
|         // ╵ | ||||
|         static final String UP = "\u2575"; | ||||
|         // ╶ | ||||
|         static final String RIGHT = "\u2576"; | ||||
|         // ╷ | ||||
|         static final String DOWN = "\u2577"; | ||||
|         // ┌ | ||||
|         static final String DOWN_RIGHT = "\u250c"; | ||||
|         // ┐ | ||||
|         static final String DOWN_LEFT = "\u2510"; | ||||
|         // └ | ||||
|         static final String UP_RIGHT = "\u2514"; | ||||
|         // ┘ | ||||
|         static final String UP_LEFT = "\u2518"; | ||||
|         // ├ | ||||
|         static final String VERTICAL_RIGHT = "\u251c"; | ||||
|         // ┤ | ||||
|         static final String VERTICAL_LEFT = "\u2524"; | ||||
|         // ┬ | ||||
|         static final String HORIZONTAL_DOWN = "\u252c"; | ||||
|         // ┴ | ||||
|         static final String HORIZONTAL_UP = "\u2534"; | ||||
|         // ┼ | ||||
|         static final String CROSS = "\u253c"; | ||||
|         boolean up = false; | ||||
|         @Builder.Default | ||||
|         boolean down = false; | ||||
|         @Builder.Default | ||||
|         boolean left = false; | ||||
|         @Builder.Default | ||||
|         boolean right = false; | ||||
| 
 | ||||
|         CharDefinition up() { | ||||
|             this.up = true; | ||||
|             return this; | ||||
|         } | ||||
| 
 | ||||
|         CharDefinition down() { | ||||
|             this.down = true; | ||||
|             return this; | ||||
|         } | ||||
| 
 | ||||
|         CharDefinition vertical() { | ||||
|             return this.up().down(); | ||||
|         } | ||||
| 
 | ||||
|         CharDefinition left() { | ||||
|             this.left = true; | ||||
|             return this; | ||||
|         } | ||||
| 
 | ||||
|         CharDefinition right() { | ||||
|             this.right = true; | ||||
|             return this; | ||||
|         } | ||||
| 
 | ||||
| 
 | ||||
|         CharDefinition horizontal() { | ||||
|             return this.left().right(); | ||||
|         } | ||||
| 
 | ||||
|         public String toString() { | ||||
|             if (this.up) { | ||||
|                 if (this.down) { | ||||
|  |  | |||
|  | @ -3,16 +3,12 @@ package ch.fritteli.labyrinth; | |||
| import io.vavr.collection.Stream; | ||||
| import io.vavr.control.Option; | ||||
| import lombok.AccessLevel; | ||||
| import lombok.Getter; | ||||
| import lombok.NonNull; | ||||
| import lombok.experimental.FieldDefaults; | ||||
| 
 | ||||
| @FieldDefaults(level = AccessLevel.PRIVATE) | ||||
| public class Tile { | ||||
|     // FIXME remove me; only for debugging | ||||
|     @Getter | ||||
|     final Walls walls = new Walls(); | ||||
|     @Getter | ||||
|     boolean visited = false; | ||||
| 
 | ||||
|     public Tile() { | ||||
|  |  | |||
|  | @ -1,27 +1,32 @@ | |||
| package ch.fritteli.labyrinth; | ||||
| 
 | ||||
| import ch.fritteli.labyrinth.TextRenderer.CharDefinition; | ||||
| import org.junit.jupiter.api.Nested; | ||||
| import org.junit.jupiter.api.Test; | ||||
| 
 | ||||
| import static org.junit.jupiter.api.Assertions.assertEquals; | ||||
| 
 | ||||
| class TextRendererTest { | ||||
|     @Test | ||||
|     void charDefTest() { | ||||
|         assertEquals(" ", new TextRenderer.CharDefinition(false, false, false, false).toString()); | ||||
|         assertEquals("╶", new TextRenderer.CharDefinition(false, false, false, true).toString()); | ||||
|         assertEquals("╴", new TextRenderer.CharDefinition(false, false, true, false).toString()); | ||||
|         assertEquals("─", new TextRenderer.CharDefinition(false, false, true, true).toString()); | ||||
|         assertEquals("╷", new TextRenderer.CharDefinition(false, true, false, false).toString()); | ||||
|         assertEquals("┌", new TextRenderer.CharDefinition(false, true, false, true).toString()); | ||||
|         assertEquals("┐", new TextRenderer.CharDefinition(false, true, true, false).toString()); | ||||
|         assertEquals("┬", new TextRenderer.CharDefinition(false, true, true, true).toString()); | ||||
|         assertEquals("╵", new TextRenderer.CharDefinition(true, false, false, false).toString()); | ||||
|         assertEquals("└", new TextRenderer.CharDefinition(true, false, false, true).toString()); | ||||
|         assertEquals("┘", new TextRenderer.CharDefinition(true, false, true, false).toString()); | ||||
|         assertEquals("┴", new TextRenderer.CharDefinition(true, false, true, true).toString()); | ||||
|         assertEquals("│", new TextRenderer.CharDefinition(true, true, false, false).toString()); | ||||
|         assertEquals("├", new TextRenderer.CharDefinition(true, true, false, true).toString()); | ||||
|         assertEquals("┤", new TextRenderer.CharDefinition(true, true, true, false).toString()); | ||||
|         assertEquals("┼", new TextRenderer.CharDefinition(true, true, true, true).toString()); | ||||
|     @Nested | ||||
|     class CharDefinitionTest { | ||||
|         @Test | ||||
|         void testRendering() { | ||||
|             assertEquals(" ", new CharDefinition(false, false, false, false).toString()); | ||||
|             assertEquals("╶", new CharDefinition(false, false, false, true).toString()); | ||||
|             assertEquals("╴", new CharDefinition(false, false, true, false).toString()); | ||||
|             assertEquals("─", new CharDefinition(false, false, true, true).toString()); | ||||
|             assertEquals("╷", new CharDefinition(false, true, false, false).toString()); | ||||
|             assertEquals("┌", new CharDefinition(false, true, false, true).toString()); | ||||
|             assertEquals("┐", new CharDefinition(false, true, true, false).toString()); | ||||
|             assertEquals("┬", new CharDefinition(false, true, true, true).toString()); | ||||
|             assertEquals("╵", new CharDefinition(true, false, false, false).toString()); | ||||
|             assertEquals("└", new CharDefinition(true, false, false, true).toString()); | ||||
|             assertEquals("┘", new CharDefinition(true, false, true, false).toString()); | ||||
|             assertEquals("┴", new CharDefinition(true, false, true, true).toString()); | ||||
|             assertEquals("│", new CharDefinition(true, true, false, false).toString()); | ||||
|             assertEquals("├", new CharDefinition(true, true, false, true).toString()); | ||||
|             assertEquals("┤", new CharDefinition(true, true, true, false).toString()); | ||||
|             assertEquals("┼", new CharDefinition(true, true, true, true).toString()); | ||||
|         } | ||||
|     } | ||||
| } | ||||
|  |  | |||
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