Removed useless and ugly vanilla infos (such as “Unknown map”) from the tooltips.

* NEW: Added a reflection-based API to remove all vanilla infos from the tooltips. Only effective on Bukkit 1.8.3+.
* NEW: Now using this API to remove the “Unknown map” or “Scaled at 1:8” texts from the maps in the GUI.

src/main/java/fr/moribus/imageonmap/gui/core/GuiUtils.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2013 Moribus
+ * Copyright (C) 2015 ProkopyL <prokopylmc@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package fr.moribus.imageonmap.gui.core;
+
+import org.bukkit.*;
+import org.bukkit.inventory.*;
+import org.bukkit.inventory.meta.*;
+
+import java.lang.reflect.*;
+
+
+public class GuiUtils {
+
+	private static boolean supported = true;
+
+	private static Object[] itemFlags;
+
+	static
+	{
+		try {
+			Class<?> itemFlagEnumClass = Class.forName("org.bukkit.inventory.ItemFlag");
+
+			Method valuesMethod = itemFlagEnumClass.getDeclaredMethod("values");
+			itemFlags = (Object[]) valuesMethod.invoke(null);
+
+		} catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
+			// Not supported :c
+			supported = false;
+		}
+	}
+
+	public static void removeVanillaInfos(ItemStack stack)
+	{
+		ItemMeta meta = stack.getItemMeta();
+		removeVanillaInfos(meta);
+		stack.setItemMeta(meta);
+
+	}
+
+	public static void removeVanillaInfos(ItemMeta meta)
+	{
+		if(!supported) return;
+
+		try {
+			Method addItemFlagsMethod = meta.getClass().getMethod("addItemFlags", itemFlags.getClass());
+			addItemFlagsMethod.setAccessible(true);
+			addItemFlagsMethod.invoke(meta, (Object) itemFlags);
+
+		} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException ignored) {
+			// Should never happens, or only with breaking changes in the Bukkit API.
+		}
+	}
+}

src/main/java/fr/moribus/imageonmap/gui/list/CategorySelectionGui.java

@@ -38,6 +38,7 @@ public class CategorySelectionGui extends AbstractGui {
 		ItemStack singleMaps = new ItemStack(Material.MAP);
 		ItemMeta meta = singleMaps.getItemMeta();
 		meta.setDisplayName(ChatColor.GREEN + "Single maps");
+		GuiUtils.removeVanillaInfos(meta);
 		singleMaps.setItemMeta(meta);
 
 

src/main/java/fr/moribus/imageonmap/gui/list/MapListGui.java

@@ -247,6 +247,8 @@ public class MapListGui extends AbstractGui {
 		));
 		meta.setLore(lore);
 
+		GuiUtils.removeVanillaInfos(meta);
+
 		icon.setItemMeta(meta);