XCEngine/editor/app/Platform/Win32/Windowing/EditorWindow.h

#pragma once

#ifndef NOMINMAX
#define NOMINMAX
#endif

#include "Platform/Win32/Windowing/EditorWindowSession.h"
#include "Windowing/Host/EditorWindowHostInterfaces.h"

#include <windows.h>

#include <cstdint>
#include <filesystem>
#include <memory>
#include <optional>
#include <string>
#include <string_view>
#include <vector>

namespace XCEngine::UI {

class UIDrawData;
class UIDrawList;

struct UIPoint;
struct UIRect;
struct UIInputEvent;
struct UIInputModifiers;

enum class UIPointerButton : std::uint8_t;
enum class UIInputEventType : std::uint8_t;

} // namespace XCEngine::UI

namespace XCEngine::UI::Editor {

struct UIEditorDockHostTabDropTarget;
class UIEditorWorkspaceController;

struct UIEditorDockHostInteractionState;
struct UIEditorShellInteractionFrame;
struct UIEditorShellInteractionState;
struct UIEditorShellInteractionResult;

namespace Widgets {
struct UIEditorDockHostDropPreviewState;
}

} // namespace XCEngine::UI::Editor

namespace XCEngine::UI::Editor::App {

class EditorWindowChromeController;
class EditorWindowDockHostBinding;
class EditorWindowHostRuntime;
class EditorWindowInputController;
class EditorWindowLifecycleCoordinator;
class EditorWindowMessageDispatcher;
class EditorWindowWorkspaceCoordinator;
class EditorWindowSession;

class EditorWindow final : public EditorWindowNativePeer {
public:
    explicit EditorWindow(EditorHostWindow& owner);
    ~EditorWindow();

    EditorWindow(const EditorWindow&) = delete;
    EditorWindow& operator=(const EditorWindow&) = delete;
    EditorWindow(EditorWindow&&) = delete;
    EditorWindow& operator=(EditorWindow&&) = delete;

    EditorHostWindow& GetOwner();
    const EditorHostWindow& GetOwner() const;
    std::string_view GetWindowId() const;
    HWND GetHwnd() const;
    bool HasHwnd() const;
    EditorWindowCategory GetCategory() const;
    const EditorWindowChromePolicy& GetChromePolicy() const;
    EditorWindowLifecycleState GetLifecycleState() const;
    bool IsPrimary() const;
    bool IsWorkspaceWindow() const;
    bool IsUtilityWindow() const;
    bool IsClosing() const;
    bool IsDestroyed() const;
    bool HasLiveHostWindow() const override;
    EditorNativeWindowMetrics CaptureMetrics() const override;
    bool CaptureRuntimeSurface(
        const EditorHostWindow& window,
        EditorNativeWindowRuntimeSurface& outSurface) override;
    bool CaptureFrameSnapshot(
        const EditorHostWindow& window,
        const UIEditorShellInteractionState& shellState,
        EditorNativeWindowFrameSnapshot& outSnapshot) override;
    void ApplyFrameCommands(
        const EditorHostWindow& window,
        const EditorNativeWindowFrameCommands& commands) override;
    const std::wstring& GetTitle() const;
    std::string_view GetCachedTitleText() const;
    const EditorWorkspaceWindowProjection* TryGetWorkspaceProjection() const;
    EditorWindowDockHostBinding* TryGetDockHostBinding();
    const EditorWindowDockHostBinding* TryGetDockHostBinding() const;
    void AppendChrome(
        const EditorHostWindow& window,
        ::XCEngine::UI::UIDrawList& drawList,
        float clientWidthDips) const override;
    void PrepareRuntimeInitialization(EditorHostWindow& window) override;
    void ShutdownNativeInteraction() override;
    void ResetNativeInteractionState() override;
    ::XCEngine::UI::UIPoint ConvertScreenPixelsToClientDips(
        const EditorWindowScreenPoint& screenPoint) const override;

private:
    friend class EditorWindowChromeController;
    friend class EditorWindowHostRuntime;
    friend class EditorWindowMessageDispatcher;
    friend class EditorWindowLifecycleCoordinator;
    friend class EditorWindowWorkspaceCoordinator;

    bool TryResolveDockTabDragHotspot(
        std::string_view nodeId,
        std::string_view panelId,
        const EditorWindowScreenPoint& screenPoint,
        EditorWindowScreenPoint& outHotspot) const;
    bool TryResolveDockTabDropTarget(
        const EditorWindowScreenPoint& screenPoint,
        UIEditorDockHostTabDropTarget& outTarget) const;
    void InvalidateHostWindow() const override;

    void AttachHwnd(HWND hwnd);
    void ApplyHostWindowTitle(const std::wstring& title) override;
    bool TryGetHostScreenRect(EditorWindowScreenRect& outRect) const override;
    void SetHostScreenPosition(const EditorWindowScreenPoint& screenPoint) override;
    void FocusHostWindow() override;
    void PostCloseToHost() override;
    void DestroyHostWindow() override;
    void ValidateHostFrame() const override;
    void QueueCompletedImmediateFrame(
        EditorWindowFrameTransferRequests transferRequests);
    bool HasQueuedCompletedImmediateFrame() const;
    EditorWindowFrameTransferRequests ConsumeQueuedCompletedImmediateFrameTransferRequests();
    void RequestSkipNextSteadyStateFrame() override;
    bool ConsumeSkipNextSteadyStateFrame() override;
    bool QueryCurrentClientPixelSize(
        std::uint32_t& outWidth,
        std::uint32_t& outHeight) const;
    bool ResolveRenderClientPixelSize(
        std::uint32_t& outWidth,
        std::uint32_t& outHeight) const;
    float GetDpiScale() const;
    float PixelsToDips(float pixels) const;
    ::XCEngine::UI::UIRect ResolveWorkspaceBounds(
        const EditorHostWindow& window,
        float clientWidthDips,
        float clientHeightDips) const;
    bool ShouldUseDetachedTitleBarTabStrip(
        const EditorHostWindow& window) const;
    std::vector<::XCEngine::UI::UIInputEvent> TakePendingInputEvents();
    std::optional<EditorWindowScreenPoint> QueryCursorScreenPoint() const;
    void SyncShellCapturedPointerButtonsFromSystemState(
        const UIEditorShellInteractionState& shellState);
    void ApplyShellRuntimePointerCapture(const EditorHostWindow& window);
    bool ApplyCurrentCursor() const;
    bool OnResize(UINT width, UINT height);
    void OnEnterSizeMove();
    bool OnExitSizeMove();
    void OnDpiChanged(UINT dpi, const RECT& suggestedRect);

    bool HasInteractiveCaptureState() const;
    bool OwnsPointerCapture(EditorWindowPointerCaptureOwner owner) const;
    void AcquirePointerCapture(EditorWindowPointerCaptureOwner owner) override;
    void ReleasePointerCapture(EditorWindowPointerCaptureOwner owner) override;
    void ForceReleasePointerCapture();
    void TryStartImmediateShellPointerCapture(LPARAM lParam);

    void QueuePointerEvent(
        ::XCEngine::UI::UIInputEventType type,
        ::XCEngine::UI::UIPointerButton button,
        WPARAM wParam,
        LPARAM lParam,
        bool doubleClick = false);
    void QueueSyntheticPointerStateSyncEvent(
        const ::XCEngine::UI::UIInputModifiers& modifiers);
    void QueuePointerLeaveEvent();
    void QueuePointerWheelEvent(short wheelDelta, WPARAM wParam, LPARAM lParam);
    bool ApplyWindowResize(UINT width, UINT height);
    static POINT ToNativePoint(const EditorWindowScreenPoint& screenPoint);
    static EditorWindowScreenPoint FromNativePoint(const POINT& screenPoint);
    bool IsPointerInsideClientArea() const;
    LPCWSTR ResolveCurrentCursorResource() const;
    ::XCEngine::UI::UIPoint ConvertClientPixelsToDips(LONG x, LONG y) const;
    static bool IsVerboseRuntimeTraceEnabled();

    EditorHostWindow& m_owner;
    std::unique_ptr<EditorWindowSession> m_session = {};
    std::unique_ptr<EditorWindowChromeController> m_chromeController = {};
    std::unique_ptr<EditorWindowInputController> m_inputController = {};
};

} // namespace XCEngine::UI::Editor::App