UI/AppKit: Inform WebContent of the UI window position/size

This is required for APIs like window.screenX, as well as for WebDriver
and WPT.

Ladybird/AppKit/UI/LadybirdWebView.h

@@ -65,6 +65,9 @@
 - (WebView::ViewImplementation&)view;
 - (String const&)handle;
 
+- (void)setWindowPosition:(Gfx::IntPoint)position;
+- (void)setWindowSize:(Gfx::IntSize)size;
+
 - (void)handleResize;
 - (void)handleDevicePixelRatioChange;
 - (void)handleScroll;

Ladybird/AppKit/UI/LadybirdWebView.mm

@@ -184,6 +184,16 @@ struct HideCursor {
     return m_web_view_bridge->handle();
 }
 
+- (void)setWindowPosition:(Gfx::IntPoint)position
+{
+    m_web_view_bridge->set_window_position(Ladybird::compute_origin_relative_to_window([self window], position));
+}
+
+- (void)setWindowSize:(Gfx::IntSize)size
+{
+    m_web_view_bridge->set_window_size(size);
+}
+
 - (void)handleResize
 {
     [self updateViewportRect:Ladybird::WebViewBridge::ForResize::Yes];
@@ -1546,6 +1556,10 @@ static void copy_data_to_clipboard(StringView data, NSPasteboardType pasteboard_
 {
     [super viewDidMoveToWindow];
     [self handleResize];
+
+    auto window = Ladybird::ns_rect_to_gfx_rect([[self window] frame]);
+    [self setWindowPosition:window.location()];
+    [self setWindowSize:window.size()];
 }
 
 - (void)viewDidEndLiveResize

Ladybird/AppKit/UI/TabController.mm

@@ -607,6 +607,12 @@ static NSString* const TOOLBAR_TAB_OVERVIEW_IDENTIFIER = @"ToolbarTabOverviewIde
     [delegate removeTab:self];
 }
 
+- (void)windowDidMove:(NSNotification*)notification
+{
+    auto position = Ladybird::ns_point_to_gfx_point([[self tab] frame].origin);
+    [[[self tab] web_view] setWindowPosition:position];
+}
+
 - (void)windowDidResize:(NSNotification*)notification
 {
     if (self.location_toolbar_item_width != nil) {
@@ -620,6 +626,9 @@ static NSString* const TOOLBAR_TAB_OVERVIEW_IDENTIFIER = @"ToolbarTabOverviewIde
     if (![[self window] inLiveResize]) {
         [[[self tab] web_view] handleResize];
     }
+
+    auto size = Ladybird::ns_size_to_gfx_size([[self tab] frame].size);
+    [[[self tab] web_view] setWindowSize:size];
 }
 
 - (void)windowDidChangeBackingProperties:(NSNotification*)notification

Ladybird/AppKit/Utilities/Conversions.h

@@ -38,4 +38,6 @@ NSPoint gfx_point_to_ns_point(Gfx::IntPoint);
 Gfx::Color ns_color_to_gfx_color(NSColor*);
 NSColor* gfx_color_to_ns_color(Gfx::Color);
 
+Gfx::IntPoint compute_origin_relative_to_window(NSWindow*, Gfx::IntPoint);
+
 }

Ladybird/AppKit/Utilities/Conversions.mm

@@ -117,4 +117,15 @@ NSColor* gfx_color_to_ns_color(Gfx::Color color)
                            alpha:(color.alpha() / 255.f)];
 }
 
+Gfx::IntPoint compute_origin_relative_to_window(NSWindow* window, Gfx::IntPoint position)
+{
+    // The origin of the NSWindow is its bottom-left corner, relative to the bottom-left of the screen. We must convert
+    // window positions sent to/from WebContent between this origin and the window's and screen's top-left corners.
+    auto screen_frame = Ladybird::ns_rect_to_gfx_rect([[window screen] frame]);
+    auto window_frame = Ladybird::ns_rect_to_gfx_rect([window frame]);
+
+    position.set_y(screen_frame.height() - window_frame.height() - position.y());
+    return position;
+}
+
 }

Ladybird/Qt/WebContentView.cpp

@@ -536,16 +536,6 @@ void WebContentView::set_viewport_rect(Gfx::IntRect rect)
     client().async_set_viewport_size(m_client_state.page_index, rect.size().to_type<Web::DevicePixels>());
 }
 
-void WebContentView::set_window_size(Gfx::IntSize size)
-{
-    client().async_set_window_size(m_client_state.page_index, size.to_type<Web::DevicePixels>());
-}
-
-void WebContentView::set_window_position(Gfx::IntPoint position)
-{
-    client().async_set_window_position(m_client_state.page_index, position.to_type<Web::DevicePixels>());
-}
-
 void WebContentView::set_device_pixel_ratio(double device_pixel_ratio)
 {
     m_device_pixel_ratio = device_pixel_ratio;

Ladybird/Qt/WebContentView.h

@@ -73,8 +73,6 @@ public:
     virtual bool event(QEvent*) override;
 
     void set_viewport_rect(Gfx::IntRect);
-    void set_window_size(Gfx::IntSize);
-    void set_window_position(Gfx::IntPoint);
     void set_device_pixel_ratio(double);
 
     enum class PaletteMode {

Userland/Libraries/LibWebView/ViewImplementation.cpp

@@ -77,6 +77,16 @@ void ViewImplementation::server_did_paint(Badge<WebContentClient>, i32 bitmap_id
     client().async_ready_to_paint(page_id());
 }
 
+void ViewImplementation::set_window_position(Gfx::IntPoint position)
+{
+    client().async_set_window_position(m_client_state.page_index, position.to_type<Web::DevicePixels>());
+}
+
+void ViewImplementation::set_window_size(Gfx::IntSize size)
+{
+    client().async_set_window_size(m_client_state.page_index, size.to_type<Web::DevicePixels>());
+}
+
 void ViewImplementation::load(URL::URL const& url)
 {
     m_url = url;

Userland/Libraries/LibWebView/ViewImplementation.h

@@ -50,6 +50,9 @@ public:
 
     void server_did_paint(Badge<WebContentClient>, i32 bitmap_id, Gfx::IntSize size);
 
+    void set_window_position(Gfx::IntPoint);
+    void set_window_size(Gfx::IntSize);
+
     void load(URL::URL const&);
     void load_html(StringView);
     void load_empty_document();