Integrate XCUI shell state and runtime frame seams

engine/src/UI/Runtime/UISceneRuntimeContext.cpp

@@ -29,6 +29,10 @@ const UISystemFrameResult& UISceneRuntimeContext::GetLastFrame() const {
     return m_system.GetLastFrame();
 }
 
+UISystemFrameResult UISceneRuntimeContext::ConsumeLastFrame() {
+    return m_system.ConsumeLastFrame();
+}
+
 void UISceneRuntimeContext::Reset() {
     m_stackController.Clear();
     m_system.DestroyAllPlayers();

engine/src/UI/Runtime/UIScreenPlayer.cpp

@@ -75,6 +75,12 @@ const UIScreenFrameResult& UIScreenPlayer::GetLastFrame() const {
     return m_lastFrame;
 }
 
+UIScreenFrameResult UIScreenPlayer::ConsumeLastFrame() {
+    UIScreenFrameResult frame = std::move(m_lastFrame);
+    m_lastFrame = {};
+    return frame;
+}
+
 const std::string& UIScreenPlayer::GetLastError() const {
     return m_lastError;
 }

engine/src/UI/Runtime/UISystem.cpp

@@ -1,5 +1,7 @@
 #include <XCEngine/UI/Runtime/UISystem.h>
 
+#include <utility>
+
 namespace XCEngine {
 namespace UI {
 namespace Runtime {
@@ -122,6 +124,10 @@ std::size_t UISystem::GetLayerCount() const {
 const UISystemFrameResult& UISystem::Update(const UIScreenFrameInput& input) {
     m_lastFrame = {};
     m_lastFrame.frameIndex = input.frameIndex;
+    m_lastFrame.viewportRect = input.viewportRect;
+    m_lastFrame.submittedInputEventCount = input.events.size();
+    m_lastFrame.deltaTimeSeconds = input.deltaTimeSeconds;
+    m_lastFrame.focused = input.focused;
 
     if (m_players.empty()) {
         return m_lastFrame;
@@ -177,6 +183,12 @@ const UISystemFrameResult& UISystem::GetLastFrame() const {
     return m_lastFrame;
 }
 
+UISystemFrameResult UISystem::ConsumeLastFrame() {
+    UISystemFrameResult frame = std::move(m_lastFrame);
+    m_lastFrame = {};
+    return frame;
+}
+
 const std::vector<std::unique_ptr<UIScreenPlayer>>& UISystem::GetPlayers() const {
     return m_players;
 }