Refactor new editor boundaries and test ownership

new_editor/include/XCEditor/Workspace/UIEditorWorkspaceCompose.h

@@ -3,6 +3,7 @@
 #include <XCEditor/Panels/UIEditorPanelContentHost.h>
 #include <XCEditor/Panels/UIEditorPanelRegistry.h>
 #include <XCEditor/Viewport/UIEditorViewportShell.h>
+#include <XCEditor/Workspace/UIEditorWorkspaceInputOwner.h>
 #include <XCEditor/Workspace/UIEditorWorkspaceSession.h>
 #include <XCEditor/Docking/UIEditorDockHost.h>
 
@@ -95,7 +96,8 @@ UIEditorWorkspaceComposeFrame UpdateUIEditorWorkspaceCompose(
     const std::vector<::XCEngine::UI::UIInputEvent>& inputEvents,
     const Widgets::UIEditorDockHostState& dockHostState = {},
     const Widgets::UIEditorDockHostMetrics& dockHostMetrics = {},
-    const Widgets::UIEditorViewportSlotMetrics& viewportMetrics = {});
+    const Widgets::UIEditorViewportSlotMetrics& viewportMetrics = {},
+    const UIEditorWorkspaceInputOwner* inputOwner = nullptr);
 
 std::vector<std::string> CollectUIEditorWorkspaceComposeExternalBodyPanelIds(
     const UIEditorWorkspaceComposeFrame& frame);

new_editor/include/XCEditor/Workspace/UIEditorWorkspaceInputOwner.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <XCEditor/Panels/UIEditorPanelContentHost.h>
+#include <XCEditor/Docking/UIEditorDockHost.h>
+
+#include <XCEngine/UI/Types.h>
+
+#include <cstdint>
+#include <string>
+#include <string_view>
+
+namespace XCEngine::UI::Editor {
+
+enum class UIEditorWorkspaceInputOwnerKind : std::uint8_t {
+    None = 0,
+    DockHost,
+    HostedPanel,
+    Viewport
+};
+
+struct UIEditorWorkspaceInputOwner {
+    UIEditorWorkspaceInputOwnerKind kind = UIEditorWorkspaceInputOwnerKind::None;
+    std::string panelId = {};
+};
+
+std::string_view GetUIEditorWorkspaceInputOwnerKindName(
+    UIEditorWorkspaceInputOwnerKind kind);
+
+bool AreUIEditorWorkspaceInputOwnersEquivalent(
+    const UIEditorWorkspaceInputOwner& lhs,
+    const UIEditorWorkspaceInputOwner& rhs);
+
+bool IsUIEditorWorkspaceDockHostInputOwner(
+    const UIEditorWorkspaceInputOwner& owner);
+
+bool IsUIEditorWorkspaceHostedPanelInputOwner(
+    const UIEditorWorkspaceInputOwner& owner,
+    std::string_view panelId = {});
+
+bool IsUIEditorWorkspaceViewportInputOwner(
+    const UIEditorWorkspaceInputOwner& owner,
+    std::string_view panelId = {});
+
+UIEditorWorkspaceInputOwner ResolveUIEditorWorkspacePointerInputOwner(
+    const Widgets::UIEditorDockHostLayout& dockHostLayout,
+    const UIEditorPanelContentHostFrame& contentHostFrame,
+    const ::XCEngine::UI::UIPoint& pointerPosition);
+
+UIEditorWorkspaceInputOwner NormalizeUIEditorWorkspaceInputOwner(
+    UIEditorWorkspaceInputOwner owner,
+    const Widgets::UIEditorDockHostLayout& dockHostLayout,
+    const UIEditorPanelContentHostFrame& contentHostFrame);
+
+} // namespace XCEngine::UI::Editor

new_editor/include/XCEditor/Workspace/UIEditorWorkspaceInteraction.h

@@ -2,6 +2,7 @@
 
 #include <XCEditor/Docking/UIEditorDockHostInteraction.h>
 #include <XCEditor/Workspace/UIEditorWorkspaceCompose.h>
+#include <XCEditor/Workspace/UIEditorWorkspaceInputOwner.h>
 
 #include <XCEngine/UI/Types.h>
 
@@ -17,6 +18,7 @@ struct UIEditorWorkspaceInteractionModel {
 struct UIEditorWorkspaceInteractionState {
     UIEditorDockHostInteractionState dockHostInteractionState = {};
     UIEditorWorkspaceComposeState composeState = {};
+    UIEditorWorkspaceInputOwner inputOwner = {};
 };
 
 struct UIEditorWorkspaceInteractionResult {
@@ -33,6 +35,9 @@ struct UIEditorWorkspaceInteractionFrame {
     UIEditorDockHostInteractionFrame dockHostFrame = {};
     UIEditorWorkspaceComposeFrame composeFrame = {};
     UIEditorWorkspaceInteractionResult result = {};
+    UIEditorWorkspaceInputOwner previousInputOwner = {};
+    UIEditorWorkspaceInputOwner inputOwner = {};
+    bool inputOwnerChanged = false;
 };
 
 UIEditorWorkspaceInteractionFrame UpdateUIEditorWorkspaceInteraction(