Add API: SetPreeditCursorRectangle

This is for GLFW3: glfwSetPreeditCursorRectangle

Author: daipom

src/raylib.h

@@ -1110,6 +1110,7 @@ RLAPI void SetExitKey(int key);                               // Set a custom ke
 RLAPI int GetKeyPressed(void);                                // Get key pressed (keycode), call it multiple times for keys queued, returns 0 when the queue is empty
 RLAPI int GetCharPressed(void);                               // Get char pressed (unicode), call it multiple times for chars queued, returns 0 when the queue is empty
 RLAPI void SetPreeditCallback(PreeditCallback callback);      // Set a callback for preedit
+RLAPI void SetPreeditCursorRectangle(int x, int y, int w, int h); // Set the preedit cursor area that is used to decide the position of the candidate window
 
 // Input-related functions: gamepads
 RLAPI bool IsGamepadAvailable(int gamepad);                   // Check if a gamepad is available

src/rcore.c

@@ -3557,6 +3557,13 @@ void SetPreeditCallback(PreeditCallback callback)
     CORE.Input.Keyboard.preeditCallback = callback;
 }
 
+// Set the preedit cursor area.
+// This is used to decide the position of the candidate window.
+void SetPreeditCursorRectangle(int x, int y, int w, int h)
+{
+    glfwSetPreeditCursorRectangle(CORE.Window.handle, x, y, w, h);
+}
+
 // Set a custom key to exit program
 // NOTE: default exitKey is ESCAPE
 void SetExitKey(int key)