Refactor window controls

[cavedroid.git] / core / src / ru / deadsoftware / cavedroid / game / model / item / InventoryItem.kt

diff --git a/core/src/ru/deadsoftware/cavedroid/game/model/item/InventoryItem.kt b/core/src/ru/deadsoftware/cavedroid/game/model/item/InventoryItem.kt
index 49cc59d6a5366f484df8a51a6ecd400d538a2a14..f847f7d0e3dd4d1f19ed91ee37266d3355a218c0 100644 (file)
--- a/core/src/ru/deadsoftware/cavedroid/game/model/item/InventoryItem.kt
+++ b/core/src/ru/deadsoftware/cavedroid/game/model/item/InventoryItem.kt
@@ -4,16 +4,29 @@ import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.graphics.glutils.ShapeRenderer
 import ru.deadsoftware.cavedroid.game.GameItemsHolder
+import ru.deadsoftware.cavedroid.game.mobs.player.Inventory
 import ru.deadsoftware.cavedroid.misc.Assets
+import ru.deadsoftware.cavedroid.misc.utils.drawSprite
 import ru.deadsoftware.cavedroid.misc.utils.drawString
 import ru.deadsoftware.cavedroid.misc.utils.px
 import java.io.Serializable
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.contract
 
 class InventoryItem @JvmOverloads constructor(
     val itemKey: String,
-    var amount: Int = 1,
+    _amount: Int = 1,
 ) : Serializable {
 
+    var amount = _amount
+        set(value) {
+            field = if (value < 0) {
+                0
+            } else {
+                value
+            }
+        }
+
     @Transient
     lateinit var item: Item
         private set
@@ -30,18 +43,59 @@ class InventoryItem @JvmOverloads constructor(
         item = gameItemsHolder.getItem(itemKey)
     }
 
+    @JvmOverloads
+    fun add(count: Int = 1) {
+        if (count > 0 && Int.MAX_VALUE - count < amount) {
+            throw IllegalArgumentException("$amount + $count exceeds Int.MAX_VALUE")
+        }
+
+        amount += count
+    }
+
+    @JvmOverloads
+    fun subtract(count: Int = 1) {
+        if (count < 0) {
+            throw IllegalArgumentException("Can't subtract negative amount")
+        }
+
+        add(-count)
+    }
+
+    @JvmOverloads
+    fun canBeAdded(count: Int = 1): Boolean {
+        return amount + count <= item.params.maxStack
+    }
+
     private fun drawAmountText(spriteBatch: SpriteBatch, text: String,  x: Float, y: Float) {
         spriteBatch.drawString(text, x + 1, y + 1, Color.BLACK)
         spriteBatch.drawString(text, x, y, Color.WHITE)
     }
 
+    fun drawSelected(spriteBatch: SpriteBatch, x: Float, y: Float) {
+        if (item.isNone()) {
+            return
+        }
+
+        val sprite = item.sprite
+        val amountString = amount.toString()
+        spriteBatch.drawSprite(sprite, x - 10f, y - 10f, rotation = 0f, width = 20f, height = 20f)
+        drawAmountText(
+            spriteBatch = spriteBatch,
+            text = amountString,
+            x = x + 10f - Assets.getStringWidth(amountString) + 1f,
+            y = y + 10f - Assets.getStringHeight(amountString) + 1f
+        )
+    }
+
     fun draw(spriteBatch: SpriteBatch, shapeRenderer: ShapeRenderer, x: Float, y: Float) {
         if (item.isNone()) {
             return
         }
 
         val sprite = item.sprite
-        spriteBatch.draw(sprite, x, y)
+        val placeableMarginTop = (item as? Item.Placeable)?.block?.params?.spriteMargins?.top ?: 0
+        val placeableMarginLeft = (item as? Item.Placeable)?.block?.params?.spriteMargins?.left ?: 0
+        spriteBatch.drawSprite(sprite, x + placeableMarginLeft, y + placeableMarginTop)
 
         if (amount < 2) {
             return
@@ -70,4 +124,12 @@ class InventoryItem @JvmOverloads constructor(
         }
     }
 
+    companion object {
+
+        @OptIn(ExperimentalContracts::class)
+        fun InventoryItem?.isNoneOrNull(): Boolean {
+            contract { returns(false) implies(this@isNoneOrNull != null) }
+            return this?.item == null || this.item.isNone()
+        }
+    }
 }