Add window resizing and positioning on Mac

Source/Engine/Platform/Base/WindowBase.h

@@ -521,6 +521,7 @@ public:
     /// <param name="position">The client area position.</param>
     API_PROPERTY() virtual void SetClientPosition(const Vector2& position)
     {
+        SetClientBounds(Rectangle(position, GetClientSize()));
     }
 
     /// <summary>

Source/Engine/Platform/Mac/MacPlatform.cpp

@@ -81,6 +81,15 @@ Vector2 MacUtils::PosToCoca(const Vector2& pos)
     return result;
 }
 
+Vector2 MacUtils::CocaToPos(const Vector2& pos)
+{
+    // MacOS uses y-coordinate starting at the bottom of the screen
+    Vector2 result = pos;
+    result -= GetScreensOrigin();
+    result.Y *= -1;
+    return result;
+}
+
 Vector2 MacUtils::GetScreensOrigin()
 {
     Vector2 result = Vector2::Zero;

Source/Engine/Platform/Mac/MacUtils.h

@@ -11,5 +11,6 @@ public:
     static String ToString(CFStringRef str);
     static CFStringRef ToString(const StringView& str);
     static Vector2 PosToCoca(const Vector2& pos);
+    static Vector2 CocaToPos(const Vector2& pos);
     static Vector2 GetScreensOrigin();
 };

Source/Engine/Platform/Mac/MacWindow.cpp

@@ -430,7 +430,7 @@ MacWindow::MacWindow(const CreateWindowSettings& settings)
     NSUInteger styleMask = NSWindowStyleMaskClosable;
     if (settings.IsRegularWindow)
     {
-        styleMask |= NSWindowStyleMaskTitled | NSWindowStyleMaskFullSizeContentView;
+        styleMask |= NSWindowStyleMaskTitled;
         if (settings.AllowMinimize)
             styleMask |= NSWindowStyleMaskMiniaturizable;
         if (settings.HasSizingFrame || settings.AllowMaximize)
@@ -468,7 +468,6 @@ MacWindow::MacWindow(const CreateWindowSettings& settings)
     // TODO: impl StartPosition for MacWindow
     // TODO: impl Fullscreen for MacWindow
     // TODO: impl ShowInTaskbar for MacWindow
-    // TODO: impl ActivateWhenFirstShown for MacWindow
     // TODO: impl AllowInput for MacWindow
     // TODO: impl AllowDragAndDrop for MacWindow
     // TODO: impl IsTopmost for MacWindow
@@ -558,6 +557,8 @@ void MacWindow::Minimize()
     if (!_settings.AllowMinimize)
         return;
     NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
     if (!window.miniaturized)
         [window miniaturize:nil];
 }
@@ -601,15 +602,90 @@ void MacWindow::SetIsFullscreen(bool isFullscreen)
     // TODO: fullscreen mode on Mac
 }
 
+void MacWindow::SetClientBounds(const Rectangle& clientArea)
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
+    NSRect oldRect = [window frame];
+    NSRect newRect = NSMakeRect(0, 0, clientArea.Size.X, clientArea.Size.Y);
+    newRect = [window frameRectForContentRect:newRect];
+
+    //newRect.origin.x = oldRect.origin.x;
+    //newRect.origin.y = NSMaxY(oldRect) - newRect.size.height;
+
+    Vector2 pos = MacUtils::PosToCoca(clientArea.Location);
+    NSRect frameStart = [window frameRectForContentRect:NSMakeRect(0, 0, 0, 0)];
+    newRect.origin.x = pos.X;
+    newRect.origin.y = pos.Y - newRect.size.height + frameStart.size.height;
+
+    [window setFrame:newRect display:YES];
+}
+
+void MacWindow::SetPosition(const Vector2& position)
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
+    Vector2 pos = MacUtils::PosToCoca(position);
+    NSRect rect = [window frame];
+    [window setFrameOrigin:NSMakePoint(pos.X, pos.Y - rect.size.height)];
+}
+
+Vector2 MacWindow::GetPosition() const
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return Vector2::Zero;
+    NSRect rect = [window frame];
+    return MacUtils::CocaToPos(Vector2(rect.origin.x, rect.origin.y + rect.size.height));
+}
+
+Vector2 MacWindow::GetSize() const
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return Vector2::Zero;
+    NSRect rect = [window frame];
+    return Vector2(rect.size.width, rect.size.height);
+}
+
+Vector2 MacWindow::GetClientSize() const
+{
+	return _clientSize;
+}
+
+Vector2 MacWindow::ScreenToClient(const Vector2& screenPos) const
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return screenPos;
+    NSRect frameStart = [window frameRectForContentRect:NSMakeRect(0, 0, 0, 0)];
+    return screenPos - GetPosition() - Vector2(0, frameStart.size.height);
+}
+
+Vector2 MacWindow::ClientToScreen(const Vector2& clientPos) const
+{
+    NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return clientPos;
+    NSRect frameStart = [window frameRectForContentRect:NSMakeRect(0, 0, 0, 0)];
+    return GetPosition() + Vector2(0, frameStart.size.height) + clientPos;
+}
+
 void MacWindow::SetOpacity(float opacity)
 {
     NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
     [window setAlphaValue:opacity];
 }
 
 void MacWindow::Focus()
 {
     NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
     [window makeKeyAndOrderFront:window];
 }
 
@@ -617,6 +693,8 @@ void MacWindow::SetTitle(const StringView& title)
 {
     _title = title;
     NSWindow* window = (NSWindow*)_window;
+    if (!window)
+        return;
     [window setTitle:(__bridge NSString*)MacUtils::ToString(_title)];
 }
 

Source/Engine/Platform/Mac/MacWindow.h

@@ -38,6 +38,13 @@ public:
     bool IsClosed() const override;
     bool IsForegroundWindow() const override;
     void BringToFront(bool force) override;
+	void SetClientBounds(const Rectangle& clientArea) override;
+	void SetPosition(const Vector2& position) override;
+	Vector2 GetPosition() const override;
+	Vector2 GetSize() const override;
+	Vector2 GetClientSize() const override;
+	Vector2 ScreenToClient(const Vector2& screenPos) const override;
+	Vector2 ClientToScreen(const Vector2& clientPos) const override;
     void SetIsFullscreen(bool isFullscreen) override;
     void SetOpacity(float opacity) override;
     void Focus() override;