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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 22 Jun 2018 22:59:18 -0400
Subject: [PATCH] ItemStack API additions for quantity/flags/lore
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index 9b38ba9bc7e72b60397476683c22d69e468d9353..dbd0d0610f33105ee83ab589c84e73004f684fb5 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -3,6 +3,7 @@ package org.bukkit.inventory;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import java.util.LinkedHashMap;
+import java.util.List; // Paper
import java.util.Map;
import org.bukkit.Bukkit;
import org.bukkit.Material;
@@ -665,5 +666,185 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
// Requires access to NMS
return ensureServerConversions().getMaxItemUseDuration();
}
+
+ /**
+ * Clones the itemstack and returns it a single quantity.
+ * @return The new itemstack with 1 quantity
+ */
+ @NotNull
+ public ItemStack asOne() {
+ return asQuantity(1);
+ }
+
+ /**
+ * Clones the itemstack and returns it as the specified quantity
+ * @param qty The quantity of the cloned item
+ * @return The new itemstack with specified quantity
+ */
+ @NotNull
+ public ItemStack asQuantity(int qty) {
+ ItemStack clone = clone();
+ clone.setAmount(qty);
+ return clone;
+ }
+
+ /**
+ * Adds 1 to this itemstack. Will not go over the items max stack size.
+ * @return The same item (not a clone)
+ */
+ @NotNull
+ public ItemStack add() {
+ return add(1);
+ }
+
+ /**
+ * Adds quantity to this itemstack. Will not go over the items max stack size.
+ *
+ * @param qty The amount to add
+ * @return The same item (not a clone)
+ */
+ @NotNull
+ public ItemStack add(int qty) {
+ setAmount(Math.min(getMaxStackSize(), getAmount() + qty));
+ return this;
+ }
+
+ /**
+ * Subtracts 1 to this itemstack. Going to 0 or less will invalidate the item.
+ * @return The same item (not a clone)
+ */
+ @NotNull
+ public ItemStack subtract() {
+ return subtract(1);
+ }
+
+ /**
+ * Subtracts quantity to this itemstack. Going to 0 or less will invalidate the item.
+ *
+ * @param qty The amount to add
+ * @return The same item (not a clone)
+ */
+ @NotNull
+ public ItemStack subtract(int qty) {
+ setAmount(Math.max(0, getAmount() - qty));
+ return this;
+ }
+
+ /**
+ * If the item has lore, returns it, else it will return null
+ * @return The lore, or null
+ * @deprecated in favor of {@link #lore()}
+ */
+ @Deprecated
+ public @Nullable List<String> getLore() {
+ if (!hasItemMeta()) {
+ return null;
+ }
+ ItemMeta itemMeta = getItemMeta();
+ if (!itemMeta.hasLore()) {
+ return null;
+ }
+ return itemMeta.getLore();
+ }
+
+ /**
+ * If the item has lore, returns it, else it will return null
+ * @return The lore, or null
+ */
+ public @Nullable List<net.kyori.adventure.text.Component> lore() {
+ if (!this.hasItemMeta()) {
+ return null;
+ }
+ final ItemMeta itemMeta = getItemMeta();
+ if (!itemMeta.hasLore()) {
+ return null;
+ }
+ return itemMeta.lore();
+ }
+
+ /**
+ * Sets the lore for this item.
+ * Removes lore when given null.
+ *
+ * @param lore the lore that will be set
+ * @deprecated in favour of {@link #lore(List)}
+ */
+ @Deprecated
+ public void setLore(@Nullable List<String> lore) {
+ ItemMeta itemMeta = getItemMeta();
+ if (itemMeta == null) {
+ throw new IllegalStateException("Cannot set lore on " + getType());
+ }
+ itemMeta.setLore(lore);
+ setItemMeta(itemMeta);
+ }
+
+ /**
+ * Sets the lore for this item.
+ * Removes lore when given null.
+ *
+ * @param lore the lore that will be set
+ */
+ public void lore(@Nullable List<? extends net.kyori.adventure.text.Component> lore) {
+ ItemMeta itemMeta = getItemMeta();
+ if (itemMeta == null) {
+ throw new IllegalStateException("Cannot set lore on " + getType());
+ }
+ itemMeta.lore(lore);
+ this.setItemMeta(itemMeta);
+ }
+
+ /**
+ * Set itemflags which should be ignored when rendering a ItemStack in the Client. This Method does silently ignore double set itemFlags.
+ *
+ * @param itemFlags The hideflags which shouldn't be rendered
+ */
+ public void addItemFlags(@NotNull ItemFlag... itemFlags) {
+ ItemMeta itemMeta = getItemMeta();
+ if (itemMeta == null) {
+ throw new IllegalStateException("Cannot add flags on " + getType());
+ }
+ itemMeta.addItemFlags(itemFlags);
+ setItemMeta(itemMeta);
+ }
+
+ /**
+ * Remove specific set of itemFlags. This tells the Client it should render it again. This Method does silently ignore double removed itemFlags.
+ *
+ * @param itemFlags Hideflags which should be removed
+ */
+ public void removeItemFlags(@NotNull ItemFlag... itemFlags) {
+ ItemMeta itemMeta = getItemMeta();
+ if (itemMeta == null) {
+ throw new IllegalStateException("Cannot remove flags on " + getType());
+ }
+ itemMeta.removeItemFlags(itemFlags);
+ setItemMeta(itemMeta);
+ }
+
+ /**
+ * Get current set itemFlags. The collection returned is unmodifiable.
+ *
+ * @return A set of all itemFlags set
+ */
+ @NotNull
+ public java.util.Set<ItemFlag> getItemFlags() {
+ ItemMeta itemMeta = getItemMeta();
+ if (itemMeta == null) {
+ return java.util.Collections.emptySet();
+ }
+ return itemMeta.getItemFlags();
+ }
+
+ /**
+ * Check if the specified flag is present on this item.
+ *
+ * @param flag the flag to check
+ * @return if it is present
+ */
+ public boolean hasItemFlag(@NotNull ItemFlag flag) {
+ ItemMeta itemMeta = getItemMeta();
+ return itemMeta != null && itemMeta.hasItemFlag(flag);
+ }
// Paper end
}
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