Added support for Terminal.up(), down(), left(), right() for the terminal.

src/main/java/net/rubygrapefruit/platform/Terminal.java

@@ -1,5 +1,10 @@
 package net.rubygrapefruit.platform;
 
+/**
+ * Allows the terminal/console to be manipulated.
+ *
+ * Supported on Linux, OS X, Windows.
+ */
 public interface Terminal {
     enum Color {
         Black, Red, Green, Yellow, Blue, Magenta, Cyan, White
@@ -7,26 +12,64 @@ public interface Terminal {
 
     /**
      * Returns the size of the terminal.
+     *
+     * @throws NativeException On failure.
      */
-    TerminalSize getTerminalSize();
+    TerminalSize getTerminalSize() throws NativeException;
 
     /**
      * Sets the terminal foreground color.
+     *
+     * @throws NativeException On failure.
      */
-    Terminal foreground(Color color);
+    Terminal foreground(Color color) throws NativeException;
 
     /**
      * Switches the terminal to bold mode.
+     *
+     * @throws NativeException On failure.
      */
-    Terminal bold();
+    Terminal bold() throws NativeException;
 
     /**
      * Switches the terminal to normal mode.
+     *
+     * @throws NativeException On failure.
      */
-    Terminal normal();
+    Terminal normal() throws NativeException;
 
     /**
      * Switches the terminal to normal mode and restores default colors.
+     *
+     * @throws NativeException On failure.
      */
-    Terminal reset();
+    Terminal reset() throws NativeException;
+
+    /**
+     * Moves the cursor the given number of characters to the left.
+     *
+     * @throws NativeException On failure.
+     */
+    Terminal cursorLeft(int count) throws NativeException;
+
+    /**
+     * Moves the cursor the given number of characters to the right.
+     *
+     * @throws NativeException On failure.
+     */
+    Terminal cursorRight(int count) throws NativeException;
+
+    /**
+     * Moves the cursor the given number of characters up.
+     *
+     * @throws NativeException On failure.
+     */
+    Terminal cursorUp(int count) throws NativeException;
+
+    /**
+     * Moves the cursor the given number of characters down.
+     *
+     * @throws NativeException On failure.
+     */
+    Terminal cursorDown(int count) throws NativeException;
 }