Added a command to list schematics and the abilitiy to autodetect schematic format

src/main/java/com/sk89q/worldedit/commands/SchematicCommands.java

@@ -47,9 +47,9 @@ public class SchematicCommands {
 
     @Command(
             aliases = { "load" },
-            usage = "<format> <filename>",
+            usage = "[format] <filename>",
             desc = "Load a schematic into your clipboard",
-            min = 2,
+            min = 1,
             max = 2
     )
     @CommandPermissions("worldedit.clipboard.load")
@@ -57,15 +57,28 @@ public class SchematicCommands {
                      EditSession editSession) throws WorldEditException {
 
         LocalConfiguration config = we.getConfiguration();
-        SchematicFormat format = SchematicFormat.getFormat(args.getString(0));
+        String fileName;
+        String formatName;
+
+        if (args.argsLength() == 1) {
+            formatName = null;
+            fileName = args.getString(0);
+        } else {
+            formatName = args.getString(0);
+            fileName = args.getString(1);
+        }
+        File dir = we.getWorkingDirectoryFile(config.saveDir);
+        File f = we.getSafeOpenFile(player, dir, fileName, "schematic", "schematic");
+
+        SchematicFormat format = formatName == null ? null : SchematicFormat.getFormat(formatName);
         if (format == null) {
-            player.printError("Unknown schematic format: " + args.getString(0));
-            return;
+            format = SchematicFormat.getFormat(f);
         }
 
-        String filename = args.getString(1);
-        File dir = we.getWorkingDirectoryFile(config.saveDir);
-        File f = we.getSafeOpenFile(player, dir, filename, "schematic", "schematic");
+        if (format == null) {
+            player.printError("Unknown schematic format: " + formatName);
+            return;
+        }
 
         try {
             String filePath = f.getCanonicalPath();
@@ -76,7 +89,7 @@ public class SchematicCommands {
             } else {
                 session.setClipboard(format.load(f));
                 WorldEdit.logger.info(player.getName() + " loaded " + filePath);
-                player.print(filename + " loaded. Paste it with //paste");
+                player.print(fileName + " loaded. Paste it with //paste");
             }
         } catch (DataException e) {
             player.printError("Load error: " + e.getMessage());
@@ -156,4 +169,28 @@ public class SchematicCommands {
             player.print(builder.toString());
         }
     }
+
+    @Command(
+            aliases = {"list", "all"},
+            desc = "List available schematics",
+            max = 0
+    )
+    public void list(CommandContext args, LocalSession session, LocalPlayer player,
+                        EditSession editSession) throws WorldEditException {
+        File dir = we.getWorkingDirectoryFile(we.getConfiguration().saveDir);
+        player.print("Available schematics (Filename - Format)");
+        StringBuilder builder;
+        for (File file : dir.listFiles()) {
+            if (!file.isFile()) {
+                continue;
+            }
+
+            SchematicFormat format = SchematicFormat.getFormat(file);
+            if (format == null) {
+                continue;
+            }
+
+            player.print(file.getName() + ": " + format.getName());
+        }
+    }
 }

src/main/java/com/sk89q/worldedit/schematic/MCEditSchematicFormat.java

@@ -22,6 +22,7 @@ import com.sk89q.jnbt.ByteArrayTag;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.IntTag;
 import com.sk89q.jnbt.ListTag;
+import com.sk89q.jnbt.NBTConstants;
 import com.sk89q.jnbt.NBTInputStream;
 import com.sk89q.jnbt.NBTOutputStream;
 import com.sk89q.jnbt.ShortTag;
@@ -34,6 +35,7 @@ import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.blocks.TileEntityBlock;
 import com.sk89q.worldedit.data.DataException;
 
+import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -244,6 +246,31 @@ public class MCEditSchematicFormat extends SchematicFormat {
         stream.close();
     }
 
+    @Override
+    public boolean isOfFormat(File file) {
+        DataInputStream str = null;
+        try {
+            str = new DataInputStream(new GZIPInputStream(new FileInputStream(file)));
+            if ((str.readByte() & 0xFF) != NBTConstants.TYPE_COMPOUND) {
+                return false;
+            }
+            byte[] nameBytes = new byte[str.readShort() & 0xFFFF];
+            str.readFully(nameBytes);
+            String name = new String(nameBytes, NBTConstants.CHARSET);
+            return name.equals("Schematic");
+        } catch (IOException e) {
+            return false;
+        } finally {
+            if (str != null) {
+                try {
+                    str.close();
+                } catch (IOException ignore) {
+                    // blargh
+                }
+            }
+        }
+    }
+
     /**
      * Get child tag of a NBT structure.
      *

src/main/java/com/sk89q/worldedit/schematic/SchematicFormat.java

@@ -45,6 +45,8 @@ import java.util.Set;
  */
 public abstract class SchematicFormat {
     private static final Map<String, SchematicFormat> SCHEMATIC_FORMATS = new HashMap<String, SchematicFormat>();
+
+    // Built-in schematic formats
     public static final SchematicFormat MCEDIT = new MCEditSchematicFormat();
 
     public static Set<SchematicFormat> getFormats() {
@@ -55,6 +57,19 @@ public abstract class SchematicFormat {
         return SCHEMATIC_FORMATS.get(lookupName.toLowerCase());
     }
 
+    public static SchematicFormat getFormat(File file) {
+        if (!file.isFile()) {
+            return null;
+        }
+
+        for (SchematicFormat format : SCHEMATIC_FORMATS.values()) {
+            if (format.isOfFormat(file)) {
+                return format;
+            }
+        }
+        return null;
+    }
+
     private final String name;
     private final String[] lookupNames;
 
@@ -137,4 +152,6 @@ public abstract class SchematicFormat {
      * @throws DataException If the clipboard has data which cannot be stored
      */
     public abstract void save(CuboidClipboard clipboard, File file) throws IOException, DataException;
+
+    public abstract boolean isOfFormat(File file);
 }

src/main/java/com/sk89q/worldedit/spout/SpoutBiomeType.java

@@ -34,4 +34,14 @@ public class SpoutBiomeType extends com.sk89q.worldedit.BiomeType {
     public BiomeType getSpoutBiome() {
         return type;
     }
+
+    @Override
+    public boolean equals(Object other) {
+        return other instanceof SpoutBiomeType && ((SpoutBiomeType)other).type.equals(this.type);
+    }
+
+    @Override
+    public int hashCode() {
+        return 31 + type.hashCode();
+    }
 }