XCEngine/editor/src/panels/SceneViewPanel.cpp

#include "Actions/ActionRouting.h"
#include "Core/IEditorContext.h"
#include "Core/ISceneManager.h"
#include "Core/ISelectionManager.h"
#include "SceneViewPanel.h"
#include "Viewport/SceneViewportOrientationGizmo.h"
#include "Viewport/SceneViewportOverlayRenderer.h"
#include "ViewportPanelContent.h"
#include "Platform/Win32Utf8.h"
#include "UI/UI.h"

#include <XCEngine/Debug/Logger.h>

#include <imgui.h>

#include <cstdarg>
#include <cstdio>
#include <filesystem>

namespace XCEngine {
namespace Editor {

namespace {

struct SceneViewportToolOverlayResult {
    bool hovered = false;
    bool clicked = false;
    SceneViewportToolMode clickedTool = SceneViewportToolMode::Move;
};

enum class SceneViewportActiveGizmoKind : uint8_t {
    None = 0,
    Move,
    Rotate,
    Scale
};

const char* GetSceneViewportToolTooltip(SceneViewportToolMode toolMode) {
    switch (toolMode) {
    case SceneViewportToolMode::ViewMove:
        return "View Move";
    case SceneViewportToolMode::Move:
        return "Move";
    case SceneViewportToolMode::Rotate:
        return "Rotate";
    case SceneViewportToolMode::Scale:
        return "Scale";
    case SceneViewportToolMode::Transform:
        return "Transform";
    default:
        return "";
    }
}

const char* GetSceneViewportToolIconBaseName(SceneViewportToolMode toolMode) {
    switch (toolMode) {
    case SceneViewportToolMode::ViewMove:
        return "view_move_tool";
    case SceneViewportToolMode::Move:
        return "move_tool";
    case SceneViewportToolMode::Rotate:
        return "rotate_tool";
    case SceneViewportToolMode::Scale:
        return "scale_tool";
    case SceneViewportToolMode::Transform:
        return "transform_tool";
    default:
        return "";
    }
}

const std::string& GetSceneViewportToolIconPath(SceneViewportToolMode toolMode, bool active) {
    static std::string cachedPaths[5][2] = {};
    const size_t toolIndex = static_cast<size_t>(toolMode);
    const size_t stateIndex = active ? 1u : 0u;
    std::string& cachedPath = cachedPaths[toolIndex][stateIndex];
    if (!cachedPath.empty()) {
        return cachedPath;
    }

    const std::filesystem::path exeDir(
        XCEngine::Editor::Platform::Utf8ToWide(XCEngine::Editor::Platform::GetExecutableDirectoryUtf8()));
    std::filesystem::path iconPath =
        (exeDir / L".." / L".." / L"resources" / L"Icons" /
         std::filesystem::path(XCEngine::Editor::Platform::Utf8ToWide(GetSceneViewportToolIconBaseName(toolMode))));
    if (active) {
        iconPath += L"_on";
    }
    iconPath += L".png";
    cachedPath = XCEngine::Editor::Platform::WideToUtf8(iconPath.lexically_normal().wstring());
    return cachedPath;
}

SceneViewportToolOverlayResult RenderSceneViewportToolOverlay(
    const ViewportPanelContentResult& content,
    SceneViewportToolMode activeTool) {
    SceneViewportToolOverlayResult result = {};
    if (!content.hasViewportArea) {
        return result;
    }

    constexpr float kButtonExtent = 30.0f;
    constexpr float kButtonSpacing = 6.0f;
    constexpr float kPanelPadding = 6.0f;
    constexpr float kViewportInset = 10.0f;
    constexpr float kIconInset = 4.0f;
    constexpr size_t kToolCount = 5;

    ImDrawList* drawList = ImGui::GetWindowDrawList();
    if (drawList == nullptr) {
        return result;
    }

    const ImVec2 panelMin(
        content.itemMin.x + kViewportInset,
        content.itemMin.y + kViewportInset);
    const ImVec2 panelMax(
        panelMin.x + kPanelPadding * 2.0f + kButtonExtent,
        panelMin.y + kPanelPadding * 2.0f + kToolCount * kButtonExtent + (kToolCount - 1) * kButtonSpacing);
    drawList->AddRectFilled(panelMin, panelMax, IM_COL32(24, 26, 29, 220), 7.0f);
    drawList->AddRect(panelMin, panelMax, IM_COL32(255, 255, 255, 28), 7.0f, 0, 1.0f);

    const SceneViewportToolMode toolModes[kToolCount] = {
        SceneViewportToolMode::ViewMove,
        SceneViewportToolMode::Move,
        SceneViewportToolMode::Rotate,
        SceneViewportToolMode::Scale,
        SceneViewportToolMode::Transform
    };

    for (size_t index = 0; index < kToolCount; ++index) {
        const SceneViewportToolMode toolMode = toolModes[index];
        const bool active = toolMode == activeTool;
        const ImVec2 buttonMin(
            panelMin.x + kPanelPadding,
            panelMin.y + kPanelPadding + index * (kButtonExtent + kButtonSpacing));
        const ImVec2 buttonMax(buttonMin.x + kButtonExtent, buttonMin.y + kButtonExtent);

        ImGui::SetCursorScreenPos(buttonMin);
        const std::string buttonId = std::string("##SceneToolButton") + std::to_string(static_cast<int>(toolMode));
        const bool clicked = ImGui::InvisibleButton(
            buttonId.c_str(),
            ImVec2(kButtonExtent, kButtonExtent),
            ImGuiButtonFlags_MouseButtonLeft |
                ImGuiButtonFlags_PressedOnClick |
                ImGuiButtonFlags_AllowOverlap);

        const bool hovered = ImGui::IsItemHovered();
        const bool held = ImGui::IsItemActive();
        result.hovered = result.hovered || hovered;
        result.clicked = result.clicked || clicked;
        if (clicked) {
            result.clickedTool = toolMode;
        }

        const ImU32 backgroundColor = ImGui::GetColorU32(
            held ? UI::ToolbarButtonActiveColor()
                 : hovered ? UI::ToolbarButtonHoveredColor(active)
                           : UI::ToolbarButtonColor(active));
        drawList->AddRectFilled(buttonMin, buttonMax, backgroundColor, 5.0f);
        drawList->AddRect(buttonMin, buttonMax, IM_COL32(255, 255, 255, active ? 48 : 24), 5.0f, 0, 1.0f);

        const ImVec2 iconMin(buttonMin.x + kIconInset, buttonMin.y + kIconInset);
        const ImVec2 iconMax(buttonMax.x - kIconInset, buttonMax.y - kIconInset);
        if (!UI::DrawTextureAssetPreview(
                drawList,
                iconMin,
                iconMax,
                GetSceneViewportToolIconPath(toolMode, active))) {
            drawList->AddText(
                ImVec2(buttonMin.x + 8.0f, buttonMin.y + 7.0f),
                IM_COL32(230, 230, 230, 255),
                GetSceneViewportToolTooltip(toolMode));
        }

        if (hovered) {
            ImGui::SetTooltip("%s", GetSceneViewportToolTooltip(toolMode));
        }
    }

    return result;
}

void LogSceneViewNavigation(Debug::Logger& logger, const char* format, ...) {
    char buffer[512] = {};
    va_list args;
    va_start(args, format);
    std::vsnprintf(buffer, sizeof(buffer), format, args);
    va_end(args);
    logger.Info(Debug::LogCategory::General, buffer);
}

bool ShouldBeginSceneViewportNavigationDrag(
    bool hasInteractiveViewport,
    bool hovered,
    bool activeDrag,
    bool otherDrag,
    bool gizmoActive,
    ImGuiMouseButton button) {
    return hasInteractiveViewport &&
        hovered &&
        !activeDrag &&
        !otherDrag &&
        !gizmoActive &&
        ImGui::IsMouseClicked(button);
}

SceneViewportMoveGizmoContext BuildMoveGizmoContext(
    IEditorContext& context,
    const SceneViewportOverlayData& overlay,
    const ViewportPanelContentResult& content,
    const ImVec2& mousePosition) {
    SceneViewportMoveGizmoContext gizmoContext = {};
    gizmoContext.overlay = overlay;
    gizmoContext.viewportSize = Math::Vector2(content.availableSize.x, content.availableSize.y);
    gizmoContext.mousePosition = Math::Vector2(
        mousePosition.x - content.itemMin.x,
        mousePosition.y - content.itemMin.y);

    if (context.GetSelectionManager().GetSelectionCount() == 1) {
        const uint64_t selectedEntity = context.GetSelectionManager().GetSelectedEntity();
        if (selectedEntity != 0) {
            gizmoContext.selectedObject = context.GetSceneManager().GetEntity(selectedEntity);
        }
    }

    return gizmoContext;
}

SceneViewportRotateGizmoContext BuildRotateGizmoContext(
    IEditorContext& context,
    const SceneViewportOverlayData& overlay,
    const ViewportPanelContentResult& content,
    const ImVec2& mousePosition) {
    SceneViewportRotateGizmoContext gizmoContext = {};
    gizmoContext.overlay = overlay;
    gizmoContext.viewportSize = Math::Vector2(content.availableSize.x, content.availableSize.y);
    gizmoContext.mousePosition = Math::Vector2(
        mousePosition.x - content.itemMin.x,
        mousePosition.y - content.itemMin.y);

    if (context.GetSelectionManager().GetSelectionCount() == 1) {
        const uint64_t selectedEntity = context.GetSelectionManager().GetSelectedEntity();
        if (selectedEntity != 0) {
            gizmoContext.selectedObject = context.GetSceneManager().GetEntity(selectedEntity);
        }
    }

    return gizmoContext;
}

SceneViewportScaleGizmoContext BuildScaleGizmoContext(
    IEditorContext& context,
    const SceneViewportOverlayData& overlay,
    const ViewportPanelContentResult& content,
    const ImVec2& mousePosition) {
    SceneViewportScaleGizmoContext gizmoContext = {};
    gizmoContext.overlay = overlay;
    gizmoContext.viewportSize = Math::Vector2(content.availableSize.x, content.availableSize.y);
    gizmoContext.mousePosition = Math::Vector2(
        mousePosition.x - content.itemMin.x,
        mousePosition.y - content.itemMin.y);

    if (context.GetSelectionManager().GetSelectionCount() == 1) {
        const uint64_t selectedEntity = context.GetSelectionManager().GetSelectedEntity();
        if (selectedEntity != 0) {
            gizmoContext.selectedObject = context.GetSceneManager().GetEntity(selectedEntity);
        }
    }

    return gizmoContext;
}

} // namespace

SceneViewPanel::SceneViewPanel() : Panel("Scene") {}

void SceneViewPanel::Render() {
    ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
    UI::PanelWindowScope panel(m_name.c_str());
    ImGui::PopStyleVar();
    if (!panel.IsOpen()) {
        return;
    }

    const ViewportPanelContentResult content = RenderViewportPanelContent(*m_context, EditorViewportKind::Scene);
    if (IViewportHostService* viewportHostService = m_context->GetViewportHostService()) {
        const ImGuiIO& io = ImGui::GetIO();
        auto& logger = Debug::Logger::Get();
        const bool hasInteractiveViewport = content.hasViewportArea && content.frame.hasTexture;
        const SceneViewportToolOverlayResult toolOverlay = RenderSceneViewportToolOverlay(content, m_toolMode);
        const bool viewportContentHovered = content.hovered && !toolOverlay.hovered;

        if (toolOverlay.clicked) {
            if (m_moveGizmo.IsActive()) {
                m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
            }
            if (m_rotateGizmo.IsActive()) {
                m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
            }
            if (m_scaleGizmo.IsActive()) {
                m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
            }
            m_toolMode = toolOverlay.clickedTool;
        }

        if (content.focused && !io.WantTextInput && !m_lookDragging && !m_panDragging) {
            if (ImGui::IsKeyPressed(ImGuiKey_W, false)) {
                if (m_rotateGizmo.IsActive()) {
                    m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                if (m_scaleGizmo.IsActive()) {
                    m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                m_toolMode = SceneViewportToolMode::Move;
            } else if (ImGui::IsKeyPressed(ImGuiKey_E, false)) {
                if (m_moveGizmo.IsActive()) {
                    m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                if (m_scaleGizmo.IsActive()) {
                    m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                m_toolMode = SceneViewportToolMode::Rotate;
            } else if (ImGui::IsKeyPressed(ImGuiKey_R, false)) {
                if (m_moveGizmo.IsActive()) {
                    m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                if (m_rotateGizmo.IsActive()) {
                    m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
                }
                m_toolMode = SceneViewportToolMode::Scale;
            }
        }

        const bool usingViewMoveTool = m_toolMode == SceneViewportToolMode::ViewMove;
        const bool usingTransformTool = m_toolMode == SceneViewportToolMode::Transform;
        const bool showingMoveGizmo = m_toolMode == SceneViewportToolMode::Move || usingTransformTool;
        const bool showingRotateGizmo = m_toolMode == SceneViewportToolMode::Rotate || usingTransformTool;
        const bool showingScaleGizmo = m_toolMode == SceneViewportToolMode::Scale || usingTransformTool;
        SceneViewportOverlayData overlay = {};
        SceneViewportMoveGizmoContext moveGizmoContext = {};
        SceneViewportRotateGizmoContext rotateGizmoContext = {};
        SceneViewportScaleGizmoContext scaleGizmoContext = {};
        SceneViewportActiveGizmoKind activeGizmoKind = SceneViewportActiveGizmoKind::None;

        if (hasInteractiveViewport) {
            overlay = viewportHostService->GetSceneViewOverlayData();
            if (showingMoveGizmo) {
                moveGizmoContext = BuildMoveGizmoContext(*m_context, overlay, content, io.MousePos);
                if (m_moveGizmo.IsActive() &&
                    (moveGizmoContext.selectedObject == nullptr ||
                     m_context->GetSelectionManager().GetSelectedEntity() != m_moveGizmo.GetActiveEntityId())) {
                    m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
                }
            } else if (m_moveGizmo.IsActive()) {
                m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
            }

            if (showingRotateGizmo) {
                rotateGizmoContext = BuildRotateGizmoContext(*m_context, overlay, content, io.MousePos);
                if (m_rotateGizmo.IsActive() &&
                    (rotateGizmoContext.selectedObject == nullptr ||
                     m_context->GetSelectionManager().GetSelectedEntity() != m_rotateGizmo.GetActiveEntityId())) {
                    m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
                }
            } else if (m_rotateGizmo.IsActive()) {
                m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
            }

            if (showingScaleGizmo) {
                scaleGizmoContext = BuildScaleGizmoContext(*m_context, overlay, content, io.MousePos);
                scaleGizmoContext.uniformOnly = usingTransformTool;
                if (m_scaleGizmo.IsActive() &&
                    (scaleGizmoContext.selectedObject == nullptr ||
                     m_context->GetSelectionManager().GetSelectedEntity() != m_scaleGizmo.GetActiveEntityId())) {
                    m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
                }
            } else if (m_scaleGizmo.IsActive()) {
                m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
            }

            if (m_moveGizmo.IsActive()) {
                activeGizmoKind = SceneViewportActiveGizmoKind::Move;
            } else if (m_rotateGizmo.IsActive()) {
                activeGizmoKind = SceneViewportActiveGizmoKind::Rotate;
            } else if (m_scaleGizmo.IsActive()) {
                activeGizmoKind = SceneViewportActiveGizmoKind::Scale;
            }

            if (showingMoveGizmo) {
                SceneViewportMoveGizmoContext updateContext = moveGizmoContext;
                if (activeGizmoKind != SceneViewportActiveGizmoKind::None &&
                    activeGizmoKind != SceneViewportActiveGizmoKind::Move) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_moveGizmo.Update(updateContext);
            }
            if (showingRotateGizmo) {
                SceneViewportRotateGizmoContext updateContext = rotateGizmoContext;
                if (activeGizmoKind != SceneViewportActiveGizmoKind::None &&
                    activeGizmoKind != SceneViewportActiveGizmoKind::Rotate) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_rotateGizmo.Update(updateContext);
            }
            if (showingScaleGizmo) {
                SceneViewportScaleGizmoContext updateContext = scaleGizmoContext;
                if (activeGizmoKind != SceneViewportActiveGizmoKind::None &&
                    activeGizmoKind != SceneViewportActiveGizmoKind::Scale) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_scaleGizmo.Update(updateContext);
            }
        } else {
            if (m_moveGizmo.IsActive()) {
                m_moveGizmo.CancelDrag(&m_context->GetUndoManager());
            }
            if (m_rotateGizmo.IsActive()) {
                m_rotateGizmo.CancelDrag(&m_context->GetUndoManager());
            }
            if (m_scaleGizmo.IsActive()) {
                m_scaleGizmo.CancelDrag(&m_context->GetUndoManager());
            }
        }

        const bool moveGizmoHovering = showingMoveGizmo && m_moveGizmo.IsHoveringHandle();
        const bool rotateGizmoHovering = showingRotateGizmo && m_rotateGizmo.IsHoveringHandle();
        const bool scaleGizmoHovering = showingScaleGizmo && m_scaleGizmo.IsHoveringHandle();
        const bool moveGizmoActive = showingMoveGizmo && m_moveGizmo.IsActive();
        const bool rotateGizmoActive = showingRotateGizmo && m_rotateGizmo.IsActive();
        const bool scaleGizmoActive = showingScaleGizmo && m_scaleGizmo.IsActive();
        const SceneViewportActiveGizmoKind hoveredGizmoKind = scaleGizmoHovering
            ? SceneViewportActiveGizmoKind::Scale
            : (moveGizmoHovering ? SceneViewportActiveGizmoKind::Move
                                 : (rotateGizmoHovering ? SceneViewportActiveGizmoKind::Rotate
                                                        : SceneViewportActiveGizmoKind::None));
        if (moveGizmoActive) {
            activeGizmoKind = SceneViewportActiveGizmoKind::Move;
        } else if (rotateGizmoActive) {
            activeGizmoKind = SceneViewportActiveGizmoKind::Rotate;
        } else if (scaleGizmoActive) {
            activeGizmoKind = SceneViewportActiveGizmoKind::Scale;
        } else {
            activeGizmoKind = SceneViewportActiveGizmoKind::None;
        }
        const bool gizmoHovering = hoveredGizmoKind != SceneViewportActiveGizmoKind::None;
        const bool gizmoActive = activeGizmoKind != SceneViewportActiveGizmoKind::None;

        const bool beginTransformGizmo =
            hasInteractiveViewport &&
            content.clickedLeft &&
            !m_lookDragging &&
            !m_panDragging &&
            !toolOverlay.hovered &&
            gizmoHovering;
        const SceneViewportOrientationAxis orientationAxisHit =
            hasInteractiveViewport &&
            viewportContentHovered &&
            !usingViewMoveTool &&
            !m_lookDragging &&
            !m_panDragging &&
            !gizmoHovering &&
            !gizmoActive
                ? HitTestSceneViewportOrientationGizmo(
                    overlay,
                    content.itemMin,
                    content.itemMax,
                    io.MousePos)
                : SceneViewportOrientationAxis::None;
        const bool orientationGizmoClick =
            hasInteractiveViewport &&
            content.clickedLeft &&
            orientationAxisHit != SceneViewportOrientationAxis::None;
        const bool selectClick =
            hasInteractiveViewport &&
            content.clickedLeft &&
            viewportContentHovered &&
            !usingViewMoveTool &&
            !m_lookDragging &&
            !m_panDragging &&
            !orientationGizmoClick &&
            !gizmoHovering &&
            !gizmoActive;
        const bool beginLeftPanDrag = usingViewMoveTool
            ? ShouldBeginSceneViewportNavigationDrag(
                hasInteractiveViewport,
                viewportContentHovered,
                m_panDragging,
                m_lookDragging,
                gizmoActive,
                ImGuiMouseButton_Left)
            : false;
        const bool beginLookDrag = ShouldBeginSceneViewportNavigationDrag(
            hasInteractiveViewport,
            viewportContentHovered,
            m_lookDragging,
            m_panDragging,
            gizmoActive,
            ImGuiMouseButton_Right);
        const bool beginMiddlePanDrag = ShouldBeginSceneViewportNavigationDrag(
            hasInteractiveViewport,
            viewportContentHovered,
            m_panDragging,
            m_lookDragging,
            gizmoActive,
            ImGuiMouseButton_Middle);
        const bool beginPanDrag = beginLeftPanDrag || beginMiddlePanDrag;

        if (ImGui::IsMouseClicked(ImGuiMouseButton_Right) || ImGui::IsMouseClicked(ImGuiMouseButton_Middle)) {
            LogSceneViewNavigation(
                logger,
                "SceneView nav click hovered=%d focused=%d hasViewport=%d clickedR=%d clickedM=%d downR=%d downM=%d "
                "look=%d pan=%d gizmoActive=%d ioDelta=(%.2f, %.2f)",
                content.hovered ? 1 : 0,
                content.focused ? 1 : 0,
                hasInteractiveViewport ? 1 : 0,
                ImGui::IsMouseClicked(ImGuiMouseButton_Right) ? 1 : 0,
                ImGui::IsMouseClicked(ImGuiMouseButton_Middle) ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Right) ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Middle) ? 1 : 0,
                m_lookDragging ? 1 : 0,
                m_panDragging ? 1 : 0,
                gizmoActive ? 1 : 0,
                io.MouseDelta.x,
                io.MouseDelta.y);
        }

        if (toolOverlay.clicked || beginTransformGizmo || orientationGizmoClick || selectClick || beginLookDrag ||
            beginPanDrag) {
            ImGui::SetWindowFocus();
        }

        if (beginTransformGizmo) {
            if (hoveredGizmoKind == SceneViewportActiveGizmoKind::Scale) {
                m_scaleGizmo.TryBeginDrag(scaleGizmoContext, m_context->GetUndoManager());
            } else if (hoveredGizmoKind == SceneViewportActiveGizmoKind::Move) {
                m_moveGizmo.TryBeginDrag(moveGizmoContext, m_context->GetUndoManager());
            } else if (hoveredGizmoKind == SceneViewportActiveGizmoKind::Rotate) {
                m_rotateGizmo.TryBeginDrag(rotateGizmoContext, m_context->GetUndoManager());
            }
        }

        if (orientationGizmoClick) {
            viewportHostService->AlignSceneViewToOrientationAxis(orientationAxisHit);
            overlay = viewportHostService->GetSceneViewOverlayData();
            if (showingMoveGizmo) {
                moveGizmoContext = BuildMoveGizmoContext(*m_context, overlay, content, io.MousePos);
                m_moveGizmo.Update(moveGizmoContext);
            }
            if (showingRotateGizmo) {
                rotateGizmoContext = BuildRotateGizmoContext(*m_context, overlay, content, io.MousePos);
                m_rotateGizmo.Update(rotateGizmoContext);
            }
            if (showingScaleGizmo) {
                scaleGizmoContext = BuildScaleGizmoContext(*m_context, overlay, content, io.MousePos);
                scaleGizmoContext.uniformOnly = usingTransformTool;
                m_scaleGizmo.Update(scaleGizmoContext);
            }
        }

        if (selectClick) {
            const ImVec2 localMousePosition(
                io.MousePos.x - content.itemMin.x,
                io.MousePos.y - content.itemMin.y);
            const uint64_t selectedEntity = viewportHostService->PickSceneViewEntity(
                *m_context,
                content.availableSize,
                localMousePosition);
            if (selectedEntity != 0) {
                m_context->GetSelectionManager().SetSelectedEntity(selectedEntity);
            } else {
                m_context->GetSelectionManager().ClearSelection();
            }
        }

        if (gizmoActive) {
            if (ImGui::IsMouseDown(ImGuiMouseButton_Left)) {
                if (activeGizmoKind == SceneViewportActiveGizmoKind::Move) {
                    m_moveGizmo.UpdateDrag(moveGizmoContext);
                } else if (activeGizmoKind == SceneViewportActiveGizmoKind::Rotate) {
                    m_rotateGizmo.UpdateDrag(rotateGizmoContext);
                } else if (activeGizmoKind == SceneViewportActiveGizmoKind::Scale) {
                    m_scaleGizmo.UpdateDrag(scaleGizmoContext);
                }
            } else {
                if (activeGizmoKind == SceneViewportActiveGizmoKind::Move) {
                    m_moveGizmo.EndDrag(m_context->GetUndoManager());
                } else if (activeGizmoKind == SceneViewportActiveGizmoKind::Rotate) {
                    m_rotateGizmo.EndDrag(m_context->GetUndoManager());
                } else if (activeGizmoKind == SceneViewportActiveGizmoKind::Scale) {
                    m_scaleGizmo.EndDrag(m_context->GetUndoManager());
                }
            }
        }

        if (beginLookDrag) {
            m_lookDragging = true;
            m_panDragging = false;
            m_loggedLookDelta = false;
            m_loggedPanDelta = false;
            LogSceneViewNavigation(
                logger,
                "SceneView begin look drag hovered=%d focused=%d downR=%d downM=%d gizmoActive=%d",
                content.hovered ? 1 : 0,
                content.focused ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Right) ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Middle) ? 1 : 0,
                gizmoActive ? 1 : 0);
        }
        if (beginPanDrag) {
            m_panDragging = true;
            m_lookDragging = false;
            m_panDragButton = beginLeftPanDrag ? ImGuiMouseButton_Left : ImGuiMouseButton_Middle;
            m_loggedPanDelta = false;
            m_loggedLookDelta = false;
            LogSceneViewNavigation(
                logger,
                "SceneView begin pan drag hovered=%d focused=%d button=%d downR=%d downM=%d downL=%d gizmoActive=%d",
                content.hovered ? 1 : 0,
                content.focused ? 1 : 0,
                m_panDragButton,
                ImGui::IsMouseDown(ImGuiMouseButton_Right) ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Middle) ? 1 : 0,
                ImGui::IsMouseDown(ImGuiMouseButton_Left) ? 1 : 0,
                gizmoActive ? 1 : 0);
        }

        if (m_lookDragging && !ImGui::IsMouseDown(ImGuiMouseButton_Right)) {
            LogSceneViewNavigation(logger, "SceneView end look drag");
            m_lookDragging = false;
            m_loggedLookDelta = false;
        }
        if (m_panDragging && !ImGui::IsMouseDown(m_panDragButton)) {
            LogSceneViewNavigation(logger, "SceneView end pan drag");
            m_panDragging = false;
            m_panDragButton = ImGuiMouseButton_Middle;
            m_loggedPanDelta = false;
        }

        if (m_lookDragging || m_panDragging || m_moveGizmo.IsActive() || m_rotateGizmo.IsActive() ||
            m_scaleGizmo.IsActive()) {
            ImGui::SetNextFrameWantCaptureMouse(true);
        }
        if (m_lookDragging) {
            ImGui::SetNextFrameWantCaptureKeyboard(true);
        }

        SceneViewportInput input = {};
        input.viewportSize = content.availableSize;
        input.deltaTime = io.DeltaTime;
        input.hovered = viewportContentHovered;
        input.focused = content.focused || m_lookDragging || m_panDragging;
        input.mouseWheel = (viewportContentHovered && !m_lookDragging) ? io.MouseWheel : 0.0f;
        input.flySpeedDelta = (viewportContentHovered && m_lookDragging) ? io.MouseWheel : 0.0f;
        input.looking = m_lookDragging;
        input.orbiting = false;
        input.panning = m_panDragging;
        input.fastMove = io.KeyShift;
        input.focusSelectionRequested =
            input.focused && !io.WantTextInput && ImGui::IsKeyPressed(ImGuiKey_F, false);

        if (m_lookDragging && !io.WantTextInput) {
            input.moveForward =
                (ImGui::IsKeyDown(ImGuiKey_W) ? 1.0f : 0.0f) -
                (ImGui::IsKeyDown(ImGuiKey_S) ? 1.0f : 0.0f);
            input.moveRight =
                (ImGui::IsKeyDown(ImGuiKey_D) ? 1.0f : 0.0f) -
                (ImGui::IsKeyDown(ImGuiKey_A) ? 1.0f : 0.0f);
            input.moveUp =
                (ImGui::IsKeyDown(ImGuiKey_E) ? 1.0f : 0.0f) -
                (ImGui::IsKeyDown(ImGuiKey_Q) ? 1.0f : 0.0f);
        }

        if (m_lookDragging || m_panDragging) {
            if (m_lookDragging) {
                input.mouseDelta = io.MouseDelta;
                if (!m_loggedLookDelta &&
                    (input.mouseDelta.x != 0.0f || input.mouseDelta.y != 0.0f)) {
                    LogSceneViewNavigation(
                        logger,
                        "SceneView look delta=(%.2f, %.2f) hovered=%d downR=%d",
                        input.mouseDelta.x,
                        input.mouseDelta.y,
                        content.hovered ? 1 : 0,
                        ImGui::IsMouseDown(ImGuiMouseButton_Right) ? 1 : 0);
                    m_loggedLookDelta = true;
                }
            }

            if (m_panDragging) {
                input.mouseDelta = io.MouseDelta;
                if (!m_loggedPanDelta &&
                    (input.mouseDelta.x != 0.0f || input.mouseDelta.y != 0.0f)) {
                    LogSceneViewNavigation(
                        logger,
                        "SceneView pan delta=(%.2f, %.2f) hovered=%d downM=%d",
                        input.mouseDelta.x,
                        input.mouseDelta.y,
                        content.hovered ? 1 : 0,
                        ImGui::IsMouseDown(ImGuiMouseButton_Middle) ? 1 : 0);
                    m_loggedPanDelta = true;
                }
            }
        }

        viewportHostService->UpdateSceneViewInput(*m_context, input);

        if (content.hasViewportArea && content.frame.hasTexture) {
            overlay = viewportHostService->GetSceneViewOverlayData();
            SceneViewportActiveGizmoKind drawActiveGizmoKind = SceneViewportActiveGizmoKind::None;
            if (m_moveGizmo.IsActive()) {
                drawActiveGizmoKind = SceneViewportActiveGizmoKind::Move;
            } else if (m_rotateGizmo.IsActive()) {
                drawActiveGizmoKind = SceneViewportActiveGizmoKind::Rotate;
            } else if (m_scaleGizmo.IsActive()) {
                drawActiveGizmoKind = SceneViewportActiveGizmoKind::Scale;
            }
            if (showingMoveGizmo) {
                moveGizmoContext = BuildMoveGizmoContext(*m_context, overlay, content, io.MousePos);
                SceneViewportMoveGizmoContext updateContext = moveGizmoContext;
                if (drawActiveGizmoKind != SceneViewportActiveGizmoKind::None &&
                    drawActiveGizmoKind != SceneViewportActiveGizmoKind::Move) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_moveGizmo.Update(updateContext);
            }
            if (showingRotateGizmo) {
                rotateGizmoContext = BuildRotateGizmoContext(*m_context, overlay, content, io.MousePos);
                SceneViewportRotateGizmoContext updateContext = rotateGizmoContext;
                if (drawActiveGizmoKind != SceneViewportActiveGizmoKind::None &&
                    drawActiveGizmoKind != SceneViewportActiveGizmoKind::Rotate) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_rotateGizmo.Update(updateContext);
            }
            if (showingScaleGizmo) {
                scaleGizmoContext = BuildScaleGizmoContext(*m_context, overlay, content, io.MousePos);
                scaleGizmoContext.uniformOnly = usingTransformTool;
                SceneViewportScaleGizmoContext updateContext = scaleGizmoContext;
                if (drawActiveGizmoKind != SceneViewportActiveGizmoKind::None &&
                    drawActiveGizmoKind != SceneViewportActiveGizmoKind::Scale) {
                    updateContext.mousePosition = Math::Vector2(-1.0f, -1.0f);
                }
                m_scaleGizmo.Update(updateContext);
            }

            DrawSceneViewportOverlay(
                ImGui::GetWindowDrawList(),
                overlay,
                content.itemMin,
                content.itemMax,
                content.availableSize,
                showingMoveGizmo ? &m_moveGizmo.GetDrawData() : nullptr,
                showingRotateGizmo ? &m_rotateGizmo.GetDrawData() : nullptr,
                showingScaleGizmo ? &m_scaleGizmo.GetDrawData() : nullptr);
        }
    }

    Actions::ObserveInactiveActionRoute(*m_context);
}

}
}