Introduce a property to let the OS window manager position dialogs when their saved position is outside the screen

src/net/java/sip/communicator/util/swing/SIPCommDialog.java

@@ -244,9 +244,17 @@ private void setSizeAndLocation()
             this.setSize(width, height);
 
         if(xString != null && yString != null)
-            this.setLocation(
-                    Integer.parseInt(xString),
-                    Integer.parseInt(yString));
+        {
+            int x = Integer.parseInt(xString);
+            int y = Integer.parseInt(yString);
+            if(ScreenInformation.
+                isTitleOnScreen(new Rectangle(x, y, width, height))
+                || config.getBoolean(
+                    SIPCommFrame.PNAME_CALCULATED_POSITIONING, true))
+            {
+                this.setLocation(x, y);
+            }
+        }
         else
             this.setCenterLocation();
     }
@@ -265,12 +273,16 @@ private void setCenterLocation()
      */
     private void ensureOnScreenLocationAndSize()
     {
+        ConfigurationService config = UtilActivator.getConfigurationService();
+        if(!config.getBoolean(SIPCommFrame.PNAME_CALCULATED_POSITIONING, true))
+            return;
+
         int x = this.getX();
         int y = this.getY();
 
         int width = this.getWidth();
         int height = this.getHeight();
-        
+
         Rectangle virtualBounds = ScreenInformation.getScreenBounds();
 
         // the default distance to the screen border

src/net/java/sip/communicator/util/swing/SIPCommFrame.java

@@ -33,6 +33,16 @@ public class SIPCommFrame
     extends JFrame
     implements Observer
 {
+    /**
+     * Property that disables the automatic resizing and positioning when a
+     * window's top edge is outside the visible area of the screen.
+     * <p>
+     * <tt>true</tt> use automatic repositioning (default)<br/>
+     * <tt>false</tt> rely on the window manager to place the window
+     */
+    static final String PNAME_CALCULATED_POSITIONING
+        = "net.sip.communicator.util.swing.USE_CALCULATED_POSITIONING";
+
     /**
      * The <tt>Logger</tt> used by the <tt>SIPCommFrame</tt> class and its
      * instances for logging output.
@@ -352,7 +362,13 @@ public void setSizeAndLocation()
             x = Integer.parseInt(xString);
             y = Integer.parseInt(yString);
 
-            this.setLocation(x, y);
+            if(ScreenInformation.
+                isTitleOnScreen(new Rectangle(x, y, width, height))
+                || configService.getBoolean(
+                    SIPCommFrame.PNAME_CALCULATED_POSITIONING, true))
+            {
+                this.setLocation(x, y);
+            }
         }
         else
         {
@@ -374,6 +390,10 @@ private void setCenterLocation()
      */
     private void ensureOnScreenLocationAndSize()
     {
+        ConfigurationService config = UtilActivator.getConfigurationService();
+        if(!config.getBoolean(SIPCommFrame.PNAME_CALCULATED_POSITIONING, true))
+            return;
+
         int x = this.getX();
         int y = this.getY();