Initial commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+
+    defaultConfig {
+        applicationId "com.bentrengrove.chess"
+        minSdkVersion 28
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+        useIR = true
+    }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion compose_version
+        kotlinCompilerVersion '1.4.10'
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    implementation "androidx.compose.ui:ui:$compose_version"
+    implementation "androidx.compose.material:material:$compose_version"
+    implementation "androidx.ui:ui-tooling:$compose_version"
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.0-alpha06'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/bentrengrove/chess/ExampleInstrumentedTest.kt

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+package com.bentrengrove.chess
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.bentrengrove.chess", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.bentrengrove.chess">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Chess">
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Chess.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/bentrengrove/chess/Board.kt

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+package com.bentrengrove.chess
+
+import androidx.annotation.DrawableRes
+
+sealed class PieceType(val value: Int) {
+    object Pawn: PieceType(1)
+    object Knight: PieceType(3)
+    object Bishop: PieceType(3)
+    object Rook: PieceType(5)
+    object Queen: PieceType(8)
+    object King: PieceType(0)
+}
+
+sealed class PieceColor {
+    object White: PieceColor()
+    object Black: PieceColor()
+
+    fun other(): PieceColor {
+        return if (this == White) Black else White
+    }
+}
+
+private fun pieceTypeFromId(id: String): Pair<PieceType, PieceColor> {
+    val chars = id.toCharArray()
+    if (chars.size != 3) throw IllegalStateException("Piece id should be 3 characters")
+    val pieceColor = when (chars[0]) {
+        'W' -> PieceColor.White
+        'B' -> PieceColor.Black
+        else -> throw IllegalStateException("First character should be W or B")
+    }
+    val pieceType = when (chars[1]) {
+        'P' -> PieceType.Pawn
+        'N' -> PieceType.Knight
+        'B' -> PieceType.Bishop
+        'R' -> PieceType.Rook
+        'Q' -> PieceType.Queen
+        'K' -> PieceType.King
+        else -> throw IllegalStateException("Second character should be a piece type")
+    }
+    return pieceType to pieceColor
+}
+data class Piece(val id: String, val type: PieceType, val color: PieceColor) {
+    companion object {
+        fun pieceFromString(id: String): Piece {
+            val types = pieceTypeFromId(id)
+            return Piece(id, types.first, types.second)
+        }
+    }
+
+    @DrawableRes
+    fun imageResource(): Int {
+        return when (type) {
+            PieceType.Pawn -> if (color is PieceColor.White) R.drawable.w_pawn_2x_ns else R.drawable.b_pawn_2x_ns
+            PieceType.Knight -> if (color is PieceColor.White) R.drawable.w_knight_2x_ns else R.drawable.b_knight_2x_ns
+            PieceType.Bishop -> if (color is PieceColor.White) R.drawable.w_bishop_2x_ns else R.drawable.b_bishop_2x_ns
+            PieceType.Rook -> if (color is PieceColor.White) R.drawable.w_rook_2x_ns else R.drawable.b_rook_2x_ns
+            PieceType.Queen -> if (color is PieceColor.White) R.drawable.w_queen_2x_ns else R.drawable.b_queen_2x_ns
+            PieceType.King -> if (color is PieceColor.White) R.drawable.w_king_2x_ns else R.drawable.b_king_2x_ns
+        }
+    }
+}
+
+data class Delta(val x: Int, val y: Int)
+data class Position(val x: Int, val y: Int) {
+    operator fun plus(other: Position): Delta {
+        return Delta(this.x + other.x, this.y + other.y)
+    }
+
+    operator fun minus(other: Position): Delta {
+        return Delta(this.x - other.x, this.y - other.y)
+    }
+}
+
+private val INITIAL_BOARD = listOf(
+    listOf("BR0", "BN1", "BB2", "BQ3", "BK4", "BB5", "BN6", "BR7").map { Piece.pieceFromString(it) },
+    listOf("BP0", "BP1", "BP2", "BP3", "BP4", "BP5", "BP6", "BP7").map { Piece.pieceFromString(it) },
+    listOf(null, null, null, null, null, null, null, null),
+    listOf(null, null, null, null, null, null, null, null),
+    listOf(null, null, null, null, null, null, null, null),
+    listOf(null, null, null, null, null, null, null, null),
+    listOf("WP0", "WP1", "WP2", "WP3", "WP4", "WP5", "WP6", "WP7").map { Piece.pieceFromString(it) },
+    listOf("WR0", "WN1", "WB2", "WQ3", "WK4", "WB5", "WN6", "WR7").map { Piece.pieceFromString(it) }
+)
+data class Board(val pieces: List<List<Piece?>> = INITIAL_BOARD) {
+    fun pieceAt(position: Position): Piece? {
+        return pieces.getOrNull(position.y)?.getOrNull(position.x)
+    }
+}

app/src/main/java/com/bentrengrove/chess/BoardView.kt

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+package com.bentrengrove.chess
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.imageResource
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun BoardView(modifier: Modifier = Modifier, board: Board) {
+    Column {
+        for (y in 0 until 8) {
+            Row {
+                for (x in 0 until 8) {
+                    val white = y % 2 == x % 2
+                    val color = if (white) Color.LightGray else Color.DarkGray
+                    Box(modifier = Modifier.weight(1f).background(color).aspectRatio(1.0f)) {
+                        val position = Position(x, y)
+                        val piece = board.pieceAt(position)
+                        if (piece != null) {
+                            Image(imageResource(id = piece.imageResource()), modifier = Modifier.padding(4.dp).matchParentSize())
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/bentrengrove/chess/MainActivity.kt

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+package com.bentrengrove.chess
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.foundation.Text
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.platform.setContent
+import androidx.ui.tooling.preview.Preview
+import com.bentrengrove.chess.ui.ChessTheme
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            ChessTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(color = MaterialTheme.colors.background) {
+                    GameView()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun GameView() {
+    val board by remember { mutableStateOf(Board())}
+    BoardView(board = board)
+}

app/src/main/java/com/bentrengrove/chess/ui/Color.kt

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+package com.bentrengrove.chess.ui
+
+import androidx.compose.ui.graphics.Color
+
+val purple200 = Color(0xFFBB86FC)
+val purple500 = Color(0xFF6200EE)
+val purple700 = Color(0xFF3700B3)
+val teal200 = Color(0xFF03DAC5)