feat: adds validation if frame is within any screens bounds (#42)

* chore: Added validation if frame is within any screens bounds.

* refactor: improve documentation and code style

---------

Co-authored-by: Kris <[email protected]>

Author: CloudS3c

gui/proxy-tool/src/main/kotlin/net/rsprox/gui/App.kt

@@ -13,6 +13,7 @@ import net.rsprox.proxy.ProxyService
 import net.rsprox.proxy.config.BINARY_PATH
 import java.awt.Desktop
 import java.awt.Dimension
+import java.awt.GraphicsEnvironment
 import java.awt.event.ComponentAdapter
 import java.awt.event.ComponentEvent
 import java.awt.event.WindowAdapter
@@ -56,6 +57,9 @@ public class App {
         frame.size = defaultSize
         frame.minimumSize = UIScale.scale(Dimension(800, 600))
         frame.iconImages = FlatSVGUtils.createWindowIconImages("/favicon.svg")
+        if (!validFramePosition(frame)) {
+            frame.setLocationRelativeTo(null)
+        }
         val windowHandler =
             object : WindowAdapter() {
                 override fun windowClosing(e: WindowEvent) {
@@ -220,6 +224,17 @@ public class App {
             add(sessionsPanel)
         }
 
+    /**
+     * Checks if the frame intersects with any screen device. If the function returns false, the window
+     * is completely outside the device's visible area, meaning the user would not be able to interact
+     * with the window.
+     */
+    private fun validFramePosition(frame: JFrame): Boolean {
+        return GraphicsEnvironment.getLocalGraphicsEnvironment().screenDevices.any { device ->
+            device.defaultConfiguration.bounds.intersects(frame.bounds)
+        }
+    }
+
     public companion object {
         public val service: ProxyService = ProxyService(ByteBufAllocator.DEFAULT)
     }