Added hidden internal helper function to access plugin carbon window wrappers

modules/juce_gui_extra/native/juce_mac_CarbonViewWrapperComponent.h

@@ -40,9 +40,9 @@ class CarbonViewWrapperComponent  : public Component,
 public:
     CarbonViewWrapperComponent()
         : ComponentMovementWatcher (this),
+          carbonWindow (nil),
           keepPluginWindowWhenHidden (false),
-          wrapperWindow (0),
-          carbonWindow (0),
+          wrapperWindow (nil),
           embeddedView (0),
           recursiveResize (false),
           repaintChildOnCreation (true)
@@ -73,7 +73,7 @@ public:
 
     void createWindow()
     {
-        if (wrapperWindow == 0)
+        if (wrapperWindow == nil)
         {
             Rect r;
             r.left   = (short) getScreenX();
@@ -135,7 +135,7 @@ public:
         removeView (embeddedView);
         embeddedView = 0;
 
-        if (wrapperWindow != 0)
+        if (wrapperWindow != nil)
         {
             NSWindow* ownerWindow = getOwnerWindow();
 
@@ -147,7 +147,7 @@ public:
 
             RemoveEventHandler (eventHandlerRef);
             DisposeWindow (wrapperWindow);
-            wrapperWindow = 0;
+            wrapperWindow = nil;
         }
     }
 
@@ -192,7 +192,7 @@ public:
                 HIViewSetFrame (embeddedView, &r);
             }
 
-            if (wrapperWindow != 0)
+            if (wrapperWindow != nil)
             {
                 jassert (getTopLevelComponent()->getDesktopScaleFactor() == 1.0f);
                 Rectangle<int> screenBounds (getScreenBounds() * Desktop::getInstance().getGlobalScaleFactor());
@@ -316,11 +316,11 @@ public:
         return ((CarbonViewWrapperComponent*) userData)->carbonEventHandler (nextHandlerRef, event);
     }
 
+    NSWindow* carbonWindow;
     bool keepPluginWindowWhenHidden;
 
 protected:
     WindowRef wrapperWindow;
-    NSWindow* carbonWindow;
     HIViewRef embeddedView;
     bool recursiveResize, repaintChildOnCreation;
     Time creationTime;
@@ -330,4 +330,15 @@ protected:
     NSWindow* getOwnerWindow() const    { return [((NSView*) getWindowHandle()) window]; }
 };
 
+//==============================================================================
+// Non-public utility function that hosts can use if they need to get hold of the
+// internals of a carbon wrapper window..
+void* getCarbonWindow (Component* possibleCarbonComponent)
+{
+    if (CarbonViewWrapperComponent* cv = dynamic_cast<CarbonViewWrapperComponent*> (possibleCarbonComponent))
+        return cv->carbonWindow;
+
+    return nullptr;
+}
+
 #endif   // JUCE_MAC_CARBONVIEWWRAPPERCOMPONENT_H_INCLUDED