Refactor scene viewport state into local sessions

editor/app/Features/Scene/SceneViewportTransformGizmo.cpp

@@ -2,6 +2,7 @@
 
 #include "Scene/SceneViewportTransformGizmoSupport.h"
 #include "Scene/EditorSceneRuntime.h"
+#include "Scene/SceneViewportSession.h"
 #include "Scene/SceneToolState.h"
 
 #include <utility>
@@ -83,10 +84,9 @@ TransformGizmoSelectionState BuildSelectionState(
     return state;
 }
 
-SceneViewportOverlayData BuildOverlayData(const EditorSceneRuntime& sceneRuntime) {
+SceneViewportOverlayData BuildOverlayData(const SceneViewportSession& session) {
     SceneViewportOverlayData overlay = {};
-    const EditorSceneCameraSnapshot snapshot =
-        sceneRuntime.BuildSceneViewCameraSnapshot();
+    const EditorSceneCameraSnapshot snapshot = session.BuildCameraSnapshot();
     if (!snapshot.valid) {
         return overlay;
     }
@@ -310,6 +310,7 @@ SceneViewportTransformGizmo& SceneViewportTransformGizmo::operator=(
 
 void SceneViewportTransformGizmo::Refresh(
     EditorSceneRuntime& sceneRuntime,
+    const SceneViewportSession& session,
     const UIRect& viewportRect,
     const UIPoint& pointerScreen,
     bool hoverEnabled) {
@@ -322,16 +323,16 @@ void SceneViewportTransformGizmo::Refresh(
         return;
     }
 
-    const SceneViewportOverlayData overlay = BuildOverlayData(sceneRuntime);
+    const SceneViewportOverlayData overlay = BuildOverlayData(session);
     if (!overlay.valid) {
         CancelDrag(sceneRuntime);
         return;
     }
 
     const bool useCenterPivot =
-        sceneRuntime.GetToolPivotMode() == SceneToolPivotMode::Center;
+        session.GetToolPivotMode() == SceneToolPivotMode::Center;
     const bool localSpace =
-        sceneRuntime.GetToolSpaceMode() == SceneToolSpaceMode::Local;
+        session.GetToolSpaceMode() == SceneToolSpaceMode::Local;
     const TransformGizmoSelectionState selection =
         BuildSelectionState(sceneRuntime, useCenterPivot);
     if (!selection.primaryObject.IsValid()) {
@@ -339,7 +340,7 @@ void SceneViewportTransformGizmo::Refresh(
         return;
     }
 
-    const SceneToolMode toolMode = sceneRuntime.GetToolMode();
+    const SceneToolMode toolMode = session.GetToolMode();
     if (toolMode == SceneToolMode::View) {
         CancelDrag(sceneRuntime);
         return;
@@ -466,11 +467,13 @@ void SceneViewportTransformGizmo::Refresh(
     }
 }
 
-bool SceneViewportTransformGizmo::TryBeginDrag(EditorSceneRuntime& sceneRuntime) {
+bool SceneViewportTransformGizmo::TryBeginDrag(
+    EditorSceneRuntime& sceneRuntime,
+    const SceneViewportSession& session) {
     State& state = *m_state;
     state.undoBridge.Bind(sceneRuntime);
 
-    switch (sceneRuntime.GetToolMode()) {
+    switch (session.GetToolMode()) {
     case SceneToolMode::Translate:
         return state.moveGizmo.TryBeginDrag(state.moveContext, state.undoBridge);
     case SceneToolMode::Rotate: