new_editor: remove tree panel behavior layer

new_editor/include/XCEditor/Collections/UIEditorTreeView.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <XCEditor/Collections/UIEditorInlineRenameSession.h>
 #include <XCEditor/Collections/UIEditorScrollView.h>
 
 #include <XCEngine/UI/DrawData.h>
@@ -160,3 +161,54 @@ void AppendUIEditorTreeView(
     const UIEditorTreeViewMetrics& metrics = {});
 
 } // namespace XCEngine::UI::Editor::Widgets
+
+namespace XCEngine::UI::Editor {
+
+bool HasUIEditorTreeViewValidBounds(
+    const ::XCEngine::UI::UIRect& bounds);
+
+std::size_t FindUIEditorTreeViewVisibleItemIndex(
+    const Widgets::UIEditorTreeViewLayout& layout,
+    const std::vector<Widgets::UIEditorTreeViewItem>& items,
+    std::string_view itemId);
+
+::XCEngine::UI::UIRect BuildUIEditorTreeViewInlineRenameBounds(
+    const Widgets::UIEditorTreeViewLayout& layout,
+    const std::vector<Widgets::UIEditorTreeViewItem>& items,
+    std::string_view itemId,
+    const Widgets::UIEditorTextFieldMetrics& hostedMetrics,
+    float minWidth = 120.0f,
+    float trailingPadding = 8.0f);
+
+Widgets::UIEditorTextFieldMetrics ResolveUIEditorTreeViewHostedTextFieldMetrics();
+
+Widgets::UIEditorTextFieldMetrics BuildUIEditorTreeViewInlineRenameMetrics(
+    const ::XCEngine::UI::UIRect& bounds);
+
+Widgets::UIEditorTextFieldPalette ResolveUIEditorTreeViewInlineRenamePalette();
+
+bool TryStartUIEditorTreeViewInlineRenameSession(
+    UIEditorInlineRenameSessionState& renameState,
+    UIEditorInlineRenameSessionFrame& renameFrame,
+    std::string_view itemId,
+    std::string initialText,
+    const ::XCEngine::UI::UIRect& bounds);
+
+void UpdateUIEditorTreeViewInlineRenameSession(
+    UIEditorInlineRenameSessionState& renameState,
+    UIEditorInlineRenameSessionFrame& renameFrame,
+    const ::XCEngine::UI::UIRect& bounds,
+    const std::vector<::XCEngine::UI::UIInputEvent>& inputEvents);
+
+void AppendUIEditorTreeViewDropPreview(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const Widgets::UIEditorTreeViewLayout& layout,
+    const std::vector<Widgets::UIEditorTreeViewItem>& items,
+    bool active,
+    bool dropToRoot,
+    std::string_view dropTargetItemId,
+    const ::XCEngine::UI::UIColor& previewColor,
+    float borderThickness = 1.0f,
+    float cornerRounding = 0.0f);
+
+} // namespace XCEngine::UI::Editor