-`new_editor` now has an explicit two-step window compositor seam through `IWindowUICompositor` / `ImGuiWindowUICompositor`, layered on top of `IEditorHostCompositor` / `ImGuiHostCompositor`
-`NativeWindowUICompositor` is now buildable alongside the legacy ImGui compositor
-`Application` now defaults to a native XCUI host path instead of creating the ImGui shell by default
- the native default path now drives `XCUIDemoRuntime` and `XCUILayoutLabRuntime` directly, composes their `UIDrawData`, and submits one swapchain packet through the native compositor
- the native compositor now publishes hosted-preview textures as SRV-backed `UITextureRegistration` / `UITextureHandle` values instead of relying on ImGui-only descriptor semantics
- the native shell now begins the hosted-preview queue/registry lifecycle each frame, queues native preview frames, drains them during the native render pass, and consumes published hosted-surface images directly in panel cards with live/warming placeholder states
- The default native text path is now also de-ImGuiized inside `new_editor`:
-`XCUIStandaloneTextAtlasProvider` now builds and owns its atlas through a Windows/GDI raster path instead of using ImGui font-atlas internals
- the standalone atlas provider now exposes both `RGBA32` and `Alpha8` views, supports non-nominal size resolution, lazily adds non-prebaked BMP glyphs, and falls back to `?` when a glyph cannot be rasterized
- Build-system hardening for MSVC/PDB output paths has started in root CMake, `engine/CMakeLists.txt`, `new_editor/CMakeLists.txt`, and `tests/NewEditor/CMakeLists.txt`.
- Shared engine-side `UIDocumentScreenHost` now compiles `.xcui` / `.xctheme` screen documents into a runtime-facing document host path instead of leaving all document ownership in `new_editor`.
- Shared text-editing primitives now live under `engine/include/XCEngine/UI/Text` and `engine/src/UI/Text`, so UTF-8 caret movement, line splitting, and multiline navigation are no longer trapped inside `XCUI Demo`.
- Shared text-input controller/state now also lives under `engine/include/XCEngine/UI/Text` and `engine/src/UI/Text`, so character insertion, backspace/delete, submit, and multiline key handling no longer need to be reimplemented per host.
- Shared editor collection primitive classification and metric helpers now also live under `engine/include/XCEngine/UI/Widgets` and `engine/src/UI/Widgets`, covering the current `ScrollView` / `TreeView` / `ListView` / `PropertySection` / `FieldRow` prototype taxonomy.
- Shared single-selection state now also lives under `engine/include/XCEngine/UI/Widgets` and `engine/src/UI/Widgets` as `UISelectionModel`, so collection-style widget selection no longer has to stay private to `LayoutLab`.
- Shared expansion state now also lives under `engine/include/XCEngine/UI/Widgets` and `engine/src/UI/Widgets` as `UIExpansionModel`, so collapsible tree/property-style widget state no longer has to stay private to `LayoutLab`.
- Shared keyboard-navigation state now also lives under `engine/include/XCEngine/UI/Widgets` and `engine/src/UI/Widgets` as `UIKeyboardNavigationModel`, so list/tree/property-style widgets can share current-index, anchor, and home/end/step navigation rules instead of re-rolling them per sandbox.
- Shared property-edit session state now also lives under `engine/include/XCEngine/UI/Widgets` and `engine/src/UI/Widgets` as `UIPropertyEditModel`, so editor-facing field rows can reuse begin/edit/commit/cancel transaction state instead of baking that directly into sandbox runtimes.
- Core regression coverage now includes `UIContext`, layout, style, runtime screen player/system, and real document-host tests through `core_ui_tests`.
- Minimal schema self-definition support is landed, including consistency checks for enum/document-only schema metadata, but schema-driven validation for `.xcui` / `.xctheme` instances is still not implemented.
- Common widget primitives are still incomplete: shared text-input presentation/composition on top of the new text controller, multi-selection/focus-traversal/virtualized collection state on top of the new editor-primitive helpers, shared scroll/navigation-scope/caret-layout helpers, and promotion of the current native text-atlas path into a shared/cross-platform text subsystem.
- The main concrete progress here is that the retained-mode demo runtime now supports a real `TextField` input path with UTF-8 text entry and backspace handling.
- The demo runtime has moved past single-line input: multiline `TextArea` behavior is now covered in the sandbox testbed.
- Engine-side runtime ownership is no longer zero: `UIScreenPlayer`, `UIDocumentScreenHost`, and `UISystem` now define a shared runtime contract for loading a screen document, ticking it with input, and collecting `UI::UIDrawData`.
-`UISystem` now supports layered screen composition semantics: stacked screen players, top-interactive input routing, and modal layers that block lower screens.
-`UIScreenStackController::ReplaceTop` now preserves the previous top screen if the replacement screen fails to load, so runtime menu flows do not silently drop their active layer on bad assets.
-`SceneRuntime` now owns a dedicated `UISceneRuntimeContext`, so game/runtime code has a first-class place to configure viewport/focus, queue `UIInputEvent`s, drive `UISystem` each `Update`, and inspect the latest UI frame result.
-`UISystemFrameResult` now also preserves viewport rect, submitted input count, frame delta, and focus state, and both `UISystem` and `UISceneRuntimeContext` now expose `ConsumeLastFrame()` so runtime/game hosts can drain the last retained frame packet without copying editor-side concepts into the shared layer.
-`UIScreenPlayer` now also exposes `ConsumeLastFrame()`, so player/system/context all share the same consume-vs-borrow frame ownership semantics in the runtime layer.
- Runtime UI is now wired into `SceneRuntime`, but render submission is still limited to producing `UIDrawData`; there is no game-view/runtime presenter path that automatically draws those frames yet.
- Native hosted preview is now working end-to-end as `RHI offscreen surface -> SRV-backed publication -> hosted surface image present` through the native shell path.
- Hosted preview surface descriptors now stay on XCUI-owned value types (`UITextureHandle`, `UIPoint`, `UIRect`) instead of exposing ImGui texture/UV types through the generic preview contract.
- Shared `UI::UIDrawData` image commands now carry explicit `uvMin` / `uvMax` source-rect semantics, and the native panel canvas host preserves those UVs when it records hosted surface-image preview commands.
-`XCUI Demo` now covers both single-line and multiline text authoring behavior, including click caret placement, delete/backspace, tab indentation, and optional text-area line numbers.
-`LayoutLab` now consumes the shared `UIEditorCollectionPrimitives` helper layer for collection-widget tag classification, clipping flags, and default metric resolution instead of keeping that taxonomy private to the sandbox runtime.
-`LayoutLab` now also consumes the shared `UISelectionModel` for click-selection persistence across collection-style widgets, and the diagnostics panel now exposes both hovered and selected element ids.
-`LayoutLab` now also consumes the shared `UIExpansionModel` for tree expansion and property-section collapse, with reserved property headers, disclosure glyphs, and persisted click-toggle behavior in the sandbox runtime.
-`new_editor` now also has an isolated `XCUIEditorCommandRouter` model with shortcut matching, enable predicates, and direct command invocation semantics covered by dedicated tests, ready for shell-frame integration.
-`XCUI Demo` now exports pending per-frame command ids through `DrainPendingCommandIds()`, so editor-side hosts have a clean seam for observing demo/runtime command traffic without parsing draw data.
-`XCUI Demo` and `LayoutLab` panel canvases are now being pulled behind a dedicated `IXCUIPanelCanvasHost` seam, so canvas surface presentation, hover/focus fallback state, and overlay draw hooks no longer have to stay hard-coded inside each ImGui panel implementation.
- The panel-canvas seam now also exposes explicit backend/capability metadata and a minimal `NullXCUIPanelCanvasHost`, so non-ImGui host paths have a concrete placeholder backend instead of relying on an implicit ImGui default.
-`XCUI Demo` and `LayoutLab` panel input now also flows through an explicit `IXCUIInputSnapshotSource` seam, so panel/runtime code no longer reads `ImGuiIO` / `ImGui::IsKeyPressed` / `ImGui::IsMouseClicked` directly when the shell wants to use an ImGui adapter.
-`new_editor` now also has an explicit `ImGuiXCUIInputSnapshotSource` adapter, keeping ImGui-specific input capture in the host adapter layer instead of inside panel/runtime update code.
-`Application` no longer owns the ImGui backend directly; window presentation now routes through `IWindowUICompositor` with an `ImGuiWindowUICompositor` implementation, which currently delegates to `IEditorHostCompositor` / `ImGuiHostCompositor`.
- The generic hosted-preview presenter contract no longer owns `ImGuiTransitionBackend`; the ImGui presenter now sits in a separate `ImGuiXCUIHostedPreviewPresenter` header while the native queue/surface registry remains XCUI-generic.
- The generic hosted-preview frame contract no longer carries an ImGui draw-list pointer; the legacy ImGui presenter resolves its inline draw target from the active ImGui window context instead of pushing that type through the XCUI contract.
- The legacy ImGui hosted-preview presenter now also accepts an explicit draw-target binding object, so presenter-side `ImGui::GetWindowDrawList()` lookup is no longer hard-coded inside the generic presenter path and can stay isolated behind the ImGui adapter layer.
-`Application` shell menu toggles and global shortcuts now route through `XCUIEditorCommandRouter` instead of directly mutating shell booleans from menu callbacks, giving the editor layer a real command-routing seam.
-`LayoutLab` runtime now consumes the shared `UIKeyboardNavigationModel` for abstract list/tree/property navigation actions (`previous/next/home/end/collapse/expand`), so keyboard collection traversal rules are no longer trapped in sandbox-local state.
-`LayoutLab` panel input now also maps concrete arrow/home/end keys into those shared navigation actions, so keyboard traversal is reachable from the sandbox UI instead of staying runtime-only.
-`XCUIDemoRuntime` now bridges pointer activation, text-edit commands, and shortcut-triggered commands through a unified command path, and `DrainPendingCommandIds()` now preserves mixed pointer/text/shortcut ordering.
-`new_editor` now also has a pure `XCUIShellChromeState` model covering panel visibility, hosted-preview mode, and shell-level view toggles without depending on ImGui, `Application`, or the old editor.
-`XCUIShellChromeState` hosted-preview mode naming is now backend-neutral (`HostedPresenter` / `NativeOffscreen`) instead of encoding `ImGui` into the XCUI shell model.
-`new_editor` now also has a concrete `NativeWindowUICompositor` path and native-focused compositor tests, so the window compositor seam is no longer ImGui-only.
-`Application` now also has a native XCUI shell path that:
- becomes the default `new_editor` startup path
- lays out `XCUI Demo` and `Layout Lab` as native cards directly in the swapchain window
- routes shell shortcuts through the same command router without reading ImGui capture state in the default host path
- drives both sandbox runtimes directly from Win32/XCUI input snapshots instead of routing through ImGui panel hosts
- composes one native `UIDrawData` packet and submits it through `NativeWindowUICompositor`
-`NativeXCUIPanelCanvasHost` now backs that direct shell path as an externally driven canvas/session host for native cards instead of assuming an ImGui child-window model, and it now emits native `Image` draw commands for hosted surface-image previews while preserving per-surface UVs.
-`NativeWindowUICompositor` now creates and frees SRV-backed texture registrations for hosted preview surfaces, so native publication no longer depends on ImGui descriptor handles.
-`Application` now runs the hosted-preview lifecycle in both legacy and native frame paths, treats published textures as XCUI-owned `UITextureHandle` state, queues native preview frames from `BuildNativeShellDrawData(...)`, and drains them during native rendering before shell chrome overlays.
- The default shell host is now native, but the legacy ImGui shell and panel path still exists as a compatibility host and is still compiled into `new_editor`.
- The default native shell path is still compiled through an `Application` translation unit that directly includes legacy ImGui host/presenter/compositor code, and `new_editor/CMakeLists.txt` still treats those legacy ImGui sources and include paths as target-global defaults.
- The native shell currently proves direct runtime composition, but its shell chrome is still a bespoke `Application`-side layout rather than a fully shared XCUI-authored editor shell document.
- Editor-specialized widgets are still incomplete at the shared-module level: the authored prototypes exist, but virtualization, multi-selection/focus traversal, toolbar/menu chrome, menu interaction widgets, and icon-atlas widgets are not yet extracted into reusable XCUI modules.
- The default native text path now uses a standalone Windows/GDI atlas through `XCUIStandaloneTextAtlasProvider`, but that provider still lives inside `new_editor` and is not yet promoted into a shared/cross-platform text subsystem.
- Common-core `UITextInputController` extraction now owns per-field text state, character insertion, enter-submit, and multiline keyboard editing behavior with dedicated `core_ui_tests` coverage.
- Common-core `UIEditorCollectionPrimitives` extraction now owns the editor collection tag taxonomy and default metric resolution used by current `LayoutLab` widget prototypes, with dedicated `core_ui_tests` coverage.
- Common-core `UISelectionModel` extraction now owns reusable single-selection state for collection-style widgets, with dedicated `core_ui_tests` coverage.
- Common-core `UIExpansionModel` extraction now owns reusable expansion/collapse state for tree/property-style widgets, with dedicated `core_ui_tests` coverage.
- Common-core `UIKeyboardNavigationModel` extraction now owns reusable current-index/anchor navigation state for collection-style widgets, with dedicated `core_ui_tests` coverage.
- Common-core `UIPropertyEditModel` extraction now owns reusable property-field edit session state, including staged values and commit/cancel behavior, with dedicated `core_ui_tests` coverage.
- LayoutLab click-selection now persists through the shared `UISelectionModel`, including selected-state diagnostics and reusable visual selection feedback on cards, collection rows, and field rows.
- LayoutLab tree expansion and property-section collapse now persist through the shared `UIExpansionModel`, including reserved property headers, disclosure glyphs, and runtime coverage for collapsed/expanded visibility.
-`XCUIDemoRuntime` now exposes `DrainPendingCommandIds()` so hosts can observe emitted runtime commands in order across pointer/text interactions without scraping UI text or draw-command payloads.
-`XCUIDemoRuntime` command recording was tightened so pointer activation, text editing, and shortcut-triggered commands now share one bridge path and preserve mixed ordering in `DrainPendingCommandIds()`.
- The window-level XCUI compositor seam now also has a dedicated regression target around `ImGuiWindowUICompositor`, covering initialization, render-frame ordering, Win32 message forwarding, texture registration forwarding, and shutdown safety.
- The window compositor and hosted-preview seams gained more edge-case coverage around no-UI render passes, compositor re-initialization/rebinding, partial logical-size fallback, and descriptor reuse for repeated queued-frame keys.
-`new_editor` now has a dedicated `XCUIEditorCommandRouter` test target covering command registration, replacement, enable predicates, accelerator matching, and policy gates around focus/keyboard capture/text input.
-`new_editor` panel canvas ownership is now being split behind `IXCUIPanelCanvasHost`, with an `ImGuiXCUIPanelCanvasHost` adapter carrying the legacy path so panel code stops directly owning `ImGui::Image` / `ImGui::InvisibleButton` / draw-list preview plumbing.
-`XCUIDemoPanel` and `XCUILayoutLabPanel` no longer create an ImGui hosted-preview presenter or ImGui panel canvas host implicitly; default construction now stays on null/explicitly injected backends until the outer shell binds a concrete host adapter.
-`Application` now binds `ImGuiXCUIPanelCanvasHost` explicitly at the shell composition root, so the current ImGui panel host path is visible as a host-layer decision instead of a panel-layer fallback.
-`XCUIDemoPanel` and `XCUILayoutLabPanel` no longer read ImGui input directly; both now consume an injected `IXCUIInputSnapshotSource`, and the new `ImGuiXCUIInputSnapshotSource` keeps the current ImGui-backed input path isolated behind an explicit adapter.
-`new_editor` now also has a pure `XCUIShellChromeState` model with dedicated tests, covering shell panel visibility, hosted-preview mode, and shell view toggles without depending on ImGui or `Application`.
-`XCUIShellChromeState` now also exposes effective hosted-preview state helpers and shell view-toggle command-id helpers, so shell routing code no longer has to manually combine enablement and requested preview mode.
-`XCUIShellChromeState` hosted-preview modes were renamed away from `LegacyImGui`, so XCUI shell state no longer treats ImGui as the generic fallback concept.
- The panel-canvas seam now has dedicated null/imgui backend coverage, including explicit backend/capability reporting and a non-ImGui placeholder host path for future native shell adoption.
-`NativeXCUIPanelCanvasHost` now drives externally configured native card sessions for that shell path and records hosted surface-image preview commands with preserved UVs
-`SceneRuntime` layered XCUI routing now has dedicated regression coverage for:
- top-interactive layer input ownership
- blocking/modal layer suppression of lower layers
- hidden top-layer pass-through back to visible underlying layers
- Shared `UITextInputController` coverage now includes more caret-boundary / modifier branches; the remaining `Delete` distinction stays blocked on `KeyCode::Delete` and `KeyCode::Backspace` still sharing the same enum value.
- Window compositor texture registration now also flows back into `Application` as XCUI-owned `UITextureRegistration` / `UITextureHandle` data instead of exposing raw `ImTextureID` there.
-`NativeWindowUICompositor` publishes hosted preview textures as SRV-backed XCUI registrations and frees them through the compositor seam
-`Application::BeginHostedPreviewFrameLifecycle(...)` now resets queue/registry state for both legacy and native frame paths
- hosted-preview surface readiness now keys on published texture availability instead of ImGui-style descriptor validity
-`BuildNativeShellDrawData(...)` now queues native preview frames for `XCUI Demo` / `LayoutLab`, while shell cards consume the previously published hosted-surface image with warming/live placeholder text
- native compositor and shell-command tests now cover the new publication / lifecycle guards
-`LayoutLab` now resolves editor collection widget taxonomy and metrics through shared `UIEditorCollectionPrimitives` helpers instead of duplicating the same tag and metric rules inside the sandbox runtime.
-`LayoutLab` runtime now consumes shared keyboard-navigation semantics for list/tree/property traversal, while the remaining panel-level key mapping is tracked as an editor-host integration gap rather than a runtime gap.
-`LayoutLab` panel now maps concrete arrow/home/end keys into the shared navigation model, with dedicated panel-level coverage proving that the sandbox UI can actually drive the runtime navigation seam end-to-end.
-`new_editor` panel/shell diagnostics improvements for hosted preview state.
- XCUI asset document loading changed to prefer direct source compilation before `ResourceManager` fallback for the sandbox path, fixing the LayoutLab crash.
-`XCUIStandaloneTextAtlasProvider` no longer uses ImGui font-atlas/internal baking helpers:
- atlas ownership now stays inside a standalone provider implementation built on Windows/GDI glyph rasterization
- default editor atlas prewarms the current supported nominal sizes, exposes both `RGBA32` and `Alpha8` atlas views, lazily inserts non-prebaked BMP glyphs, and falls back to `?` for unrasterizable codepoints
- standalone atlas coverage now includes reset/rebuild, non-nominal size resolution, lazy glyph insertion/fallback behavior, and smoke use without any ImGui context
- The default native shell path still compiles through an `Application.cpp` unit that directly pulls in ImGui compatibility host code, so the native default path is not yet isolated at the translation-unit boundary.
-`new_editor/CMakeLists.txt` still builds the legacy ImGui host/compositor/backend sources and include directories as target-global defaults instead of a compatibility-only slice.
- The default native text path now owns its atlas without ImGui, but the provider is still Windows-only and remains trapped inside `new_editor` instead of a shared/cross-platform text layer.
- Editor widget coverage is still prototype-driven inside `LayoutLab`; it has not yet been promoted into a full reusable shared widget/runtime layer with command routing, virtualization, and property-edit transactions.
- Against `XCUI完整架构设计与执行计划.md`, current `new_editor` progress should be treated as an early `Phase 8` foothold rather than full `Milestone E` completion:
- not yet landed: default-path translation-unit isolation from legacy ImGui host code, promotion of the native text-atlas path into a shared/cross-platform text subsystem, shared XCUI-authored editor shell chrome
- That means the next de-ImGui push should not keep centering on hosted-preview publication; that milestone is now effectively closed for the default native shell path.
- The real remaining default-path blockers are:
- isolate legacy ImGui shell/compositor/presenter wiring from the default `Application` build path
- stop treating ImGui include paths and backend sources as the default `new_editor` compilation surface
- harden and promote `XCUIStandaloneTextAtlasProvider` / editor font bootstrap into a shared native text subsystem
- move native shell chrome out of bespoke `Application` layout code and into a shared XCUI shell model or authored shell document
1. Expand runtime/game-layer ownership from the current `SceneRuntime` UI context into scene-declared HUD/menu bootstrapping, draw submission, and higher-level runtime UI policies.
2. Promote the current editor-facing widget prototypes out of authored `LayoutLab` content and into reusable XCUI widget/runtime modules, then continue with toolbar/menu chrome, shell-state adoption, virtualization, and broader focus/multi-selection behavior.
3. Isolate legacy ImGui shell/compositor/presenter wiring from the default native path first, starting with `Application` translation-unit separation and a `new_editor` build split that stops treating ImGui include paths and sources as the default compilation surface.
4. Promote the current standalone native text/font path out of `new_editor`, harden its atlas invalidation/caching contract, and remove the remaining default-path ImGui text/bootstrap ownership around compatibility-only code.
5. Promote the native shell chrome and card layout out of bespoke `Application` code into a shared XCUI/editor-layer shell model or authored shell document.
6. Continue phased validation, commit, push, and plan refresh after each stable batch.
