StandaloneFilterWindow: Account for native frame size in constrainer

modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h

@@ -940,11 +940,17 @@ private:
 
         BorderSize<int> computeBorder() const
         {
-            const auto outer = owner.getContentComponentBorder();
-            return { outer.getTop() + (shouldShowNotification ? NotificationArea::height : 0),
-                     outer.getLeft(),
-                     outer.getBottom(),
-                     outer.getRight() };
+            const auto nativeFrame = [&]() -> BorderSize<int>
+            {
+                if (auto* peer = owner.getPeer())
+                    if (const auto frameSize = peer->getFrameSizeIfPresent())
+                        return *frameSize;
+
+                return {};
+            }();
+
+            return nativeFrame.addedTo (owner.getContentComponentBorder())
+                              .addedTo (BorderSize<int> { shouldShowNotification ? NotificationArea::height : 0, 0, 0, 0 });
         }
 
     private:

modules/juce_graphics/geometry/juce_BorderSize.h

@@ -40,6 +40,8 @@ namespace juce
 template <typename ValueType>
 class BorderSize
 {
+    auto tie() const { return std::tie (top, left, bottom, right); }
+
 public:
     //==============================================================================
     /** Creates a null border.
@@ -98,10 +100,10 @@ public:
     /** Returns a rectangle with these borders removed from it. */
     Rectangle<ValueType> subtractedFrom (const Rectangle<ValueType>& original) const noexcept
     {
-        return Rectangle<ValueType> (original.getX() + left,
-                                     original.getY() + top,
-                                     original.getWidth() - (left + right),
-                                     original.getHeight() - (top + bottom));
+        return { original.getX() + left,
+                 original.getY() + top,
+                 original.getWidth() - (left + right),
+                 original.getHeight() - (top + bottom) };
     }
 
     /** Removes this border from a given rectangle. */
@@ -113,30 +115,40 @@ public:
     /** Returns a rectangle with these borders added around it. */
     Rectangle<ValueType> addedTo (const Rectangle<ValueType>& original) const noexcept
     {
-        return Rectangle<ValueType> (original.getX() - left,
-                                     original.getY() - top,
-                                     original.getWidth() + (left + right),
-                                     original.getHeight() + (top + bottom));
+        return { original.getX() - left,
+                 original.getY() - top,
+                 original.getWidth() + (left + right),
+                 original.getHeight() + (top + bottom) };
     }
 
-
     /** Adds this border around a given rectangle. */
     void addTo (Rectangle<ValueType>& rectangle) const noexcept
     {
         rectangle = addedTo (rectangle);
     }
 
-    //==============================================================================
-    bool operator== (const BorderSize& other) const noexcept
+    /** Removes this border from another border. */
+    BorderSize<ValueType> subtractedFrom (const BorderSize<ValueType>& other) const noexcept
     {
-        return top == other.top && left == other.left && bottom == other.bottom && right == other.right;
+        return { other.top    - top,
+                 other.left   - left,
+                 other.bottom - bottom,
+                 other.right  - right };
     }
 
-    bool operator!= (const BorderSize& other) const noexcept
+    /** Adds this border to another border. */
+    BorderSize<ValueType> addedTo (const BorderSize<ValueType>& other) const noexcept
     {
-        return ! operator== (other);
+        return { other.top    + top,
+                 other.left   + left,
+                 other.bottom + bottom,
+                 other.right  + right };
     }
 
+    //==============================================================================
+    bool operator== (const BorderSize& other) const noexcept { return tie() == other.tie(); }
+    bool operator!= (const BorderSize& other) const noexcept { return tie() != other.tie(); }
+
 private:
     //==============================================================================
     ValueType top{}, left{}, bottom{}, right{};