editor.h

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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com.                */
#ifndef GAME_EDITOR_EDITOR_H
#define GAME_EDITOR_EDITOR_H
 
#include <base/bezier.h>
#include <base/system.h>
 
#include <game/client/render.h>
#include <game/client/ui.h>
#include <game/client/ui_listbox.h>
#include <game/mapitems.h>
 
#include <game/editor/enums.h>
#include <game/editor/mapitems/envelope.h>
#include <game/editor/mapitems/layer.h>
#include <game/editor/mapitems/layer_front.h>
#include <game/editor/mapitems/layer_game.h>
#include <game/editor/mapitems/layer_group.h>
#include <game/editor/mapitems/layer_quads.h>
#include <game/editor/mapitems/layer_sounds.h>
#include <game/editor/mapitems/layer_speedup.h>
#include <game/editor/mapitems/layer_switch.h>
#include <game/editor/mapitems/layer_tele.h>
#include <game/editor/mapitems/layer_tiles.h>
#include <game/editor/mapitems/layer_tune.h>
 
#include <engine/console.h>
#include <engine/editor.h>
#include <engine/engine.h>
#include <engine/graphics.h>
#include <engine/shared/datafile.h>
#include <engine/shared/jobs.h>
 
#include "editor_history.h"
#include "editor_server_settings.h"
#include "editor_trackers.h"
#include "editor_ui.h"
#include "layer_selector.h"
#include "map_view.h"
#include "smooth_value.h"
#include <game/editor/prompt.h>
#include <game/editor/quick_action.h>
 
#include <deque>
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <vector>
 
typedef std::function<void(int *pIndex)> FIndexModifyFunction;
template<typename T>
using FDropdownRenderCallback = std::function<void(const T &, char (&aOutput)[128], std::vector<STextColorSplit> &)>;
 
// CEditor SPECIFIC
enum
{
    MODE_LAYERS = 0,
    MODE_IMAGES,
    MODE_SOUNDS,
    NUM_MODES,
 
    DIALOG_NONE = 0,
    DIALOG_FILE,
    DIALOG_MAPSETTINGS_ERROR,
    DIALOG_QUICK_PROMPT,
};
 
class CEditorImage;
class CEditorSound;
 
class CEditorMap
{
    void MakeGameGroup(std::shared_ptr<CLayerGroup> pGroup);
    void MakeGameLayer(const std::shared_ptr<CLayer> &pLayer);
 
public:
    CEditor *m_pEditor;
 
    CEditorMap()
    {
        Clean();
    }
 
    ~CEditorMap()
    {
        Clean();
    }
 
    bool m_Modified; // unsaved changes in manual save
    bool m_ModifiedAuto; // unsaved changes in autosave
    float m_LastModifiedTime;
    float m_LastSaveTime;
    float m_LastAutosaveUpdateTime;
    void OnModify();
 
    std::vector<std::shared_ptr<CLayerGroup>> m_vpGroups;
    std::vector<std::shared_ptr<CEditorImage>> m_vpImages;
    std::vector<std::shared_ptr<CEnvelope>> m_vpEnvelopes;
    std::vector<std::shared_ptr<CEditorSound>> m_vpSounds;
 
    class CMapInfo
    {
    public:
        char m_aAuthor[32];
        char m_aVersion[16];
        char m_aCredits[128];
        char m_aLicense[32];
 
        void Reset()
        {
            m_aAuthor[0] = '\0';
            m_aVersion[0] = '\0';
            m_aCredits[0] = '\0';
            m_aLicense[0] = '\0';
        }
 
        void Copy(const CMapInfo &Source)
        {
            str_copy(m_aAuthor, Source.m_aAuthor);
            str_copy(m_aVersion, Source.m_aVersion);
            str_copy(m_aCredits, Source.m_aCredits);
            str_copy(m_aLicense, Source.m_aLicense);
        }
    };
    CMapInfo m_MapInfo;
    CMapInfo m_MapInfoTmp;
 
    std::vector<CEditorMapSetting> m_vSettings;
 
    std::shared_ptr<class CLayerGame> m_pGameLayer;
    std::shared_ptr<CLayerGroup> m_pGameGroup;
 
    std::shared_ptr<CEnvelope> NewEnvelope(CEnvelope::EType Type)
    {
        OnModify();
        std::shared_ptr<CEnvelope> pEnv = std::make_shared<CEnvelope>(Type);
        m_vpEnvelopes.push_back(pEnv);
        return pEnv;
    }
 
    void DeleteEnvelope(int Index);
    void SwapEnvelopes(int Index0, int Index1);
    template<typename F>
    void VisitEnvelopeReferences(F &&Visitor);
 
    std::shared_ptr<CLayerGroup> NewGroup()
    {
        OnModify();
        std::shared_ptr<CLayerGroup> pGroup = std::make_shared<CLayerGroup>();
        pGroup->m_pMap = this;
        m_vpGroups.push_back(pGroup);
        return pGroup;
    }
 
    int SwapGroups(int Index0, int Index1)
    {
        if(Index0 < 0 || Index0 >= (int)m_vpGroups.size())
            return Index0;
        if(Index1 < 0 || Index1 >= (int)m_vpGroups.size())
            return Index0;
        if(Index0 == Index1)
            return Index0;
        OnModify();
        std::swap(m_vpGroups[Index0], m_vpGroups[Index1]);
        return Index1;
    }
 
    void DeleteGroup(int Index)
    {
        if(Index < 0 || Index >= (int)m_vpGroups.size())
            return;
        OnModify();
        m_vpGroups.erase(m_vpGroups.begin() + Index);
    }
 
    void ModifyImageIndex(FIndexModifyFunction pfnFunc)
    {
        OnModify();
        for(auto &pGroup : m_vpGroups)
            pGroup->ModifyImageIndex(pfnFunc);
    }
 
    void ModifyEnvelopeIndex(FIndexModifyFunction pfnFunc)
    {
        OnModify();
        for(auto &pGroup : m_vpGroups)
            pGroup->ModifyEnvelopeIndex(pfnFunc);
    }
 
    void ModifySoundIndex(FIndexModifyFunction pfnFunc)
    {
        OnModify();
        for(auto &pGroup : m_vpGroups)
            pGroup->ModifySoundIndex(pfnFunc);
    }
 
    void Clean();
    void CreateDefault(IGraphics::CTextureHandle EntitiesTexture);
 
    // io
    bool Save(const char *pFilename, const std::function<void(const char *pErrorMessage)> &ErrorHandler);
    bool PerformPreSaveSanityChecks(const std::function<void(const char *pErrorMessage)> &ErrorHandler);
    bool Load(const char *pFilename, int StorageType, const std::function<void(const char *pErrorMessage)> &ErrorHandler);
    void PerformSanityChecks(const std::function<void(const char *pErrorMessage)> &ErrorHandler);
 
    // DDRace
 
    std::shared_ptr<class CLayerTele> m_pTeleLayer;
    std::shared_ptr<class CLayerSpeedup> m_pSpeedupLayer;
    std::shared_ptr<class CLayerFront> m_pFrontLayer;
    std::shared_ptr<class CLayerSwitch> m_pSwitchLayer;
    std::shared_ptr<class CLayerTune> m_pTuneLayer;
    void MakeTeleLayer(const std::shared_ptr<CLayer> &pLayer);
    void MakeSpeedupLayer(const std::shared_ptr<CLayer> &pLayer);
    void MakeFrontLayer(const std::shared_ptr<CLayer> &pLayer);
    void MakeSwitchLayer(const std::shared_ptr<CLayer> &pLayer);
    void MakeTuneLayer(const std::shared_ptr<CLayer> &pLayer);
};
 
class CProperty
{
public:
    CProperty(const char *pName, int Value, int Type, int Min, int Max) :
        m_pName(pName), m_Value(Value), m_Type(Type), m_Min(Min), m_Max(Max) {}
 
    CProperty(std::nullptr_t) :
        m_pName(nullptr), m_Value(0), m_Type(0), m_Min(0), m_Max(0) {}
 
    const char *m_pName;
    int m_Value;
    int m_Type;
    int m_Min;
    int m_Max;
};
 
enum
{
    PROPTYPE_NULL = 0,
    PROPTYPE_BOOL,
    PROPTYPE_INT,
    PROPTYPE_ANGLE_SCROLL,
    PROPTYPE_COLOR,
    PROPTYPE_IMAGE,
    PROPTYPE_ENVELOPE,
    PROPTYPE_SHIFT,
    PROPTYPE_SOUND,
    PROPTYPE_AUTOMAPPER,
};
 
class CDataFileWriterFinishJob : public IJob
{
    char m_aRealFileName[IO_MAX_PATH_LENGTH];
    char m_aTempFileName[IO_MAX_PATH_LENGTH];
    CDataFileWriter m_Writer;
 
    void Run() override
    {
        m_Writer.Finish();
    }
 
public:
    CDataFileWriterFinishJob(const char *pRealFileName, const char *pTempFileName, CDataFileWriter &&Writer) :
        m_Writer(std::move(Writer))
    {
        str_copy(m_aRealFileName, pRealFileName);
        str_copy(m_aTempFileName, pTempFileName);
    }
 
    const char *GetRealFileName() const { return m_aRealFileName; }
    const char *GetTempFileName() const { return m_aTempFileName; }
};
 
class CEditor : public IEditor
{
    class IInput *m_pInput = nullptr;
    class IClient *m_pClient = nullptr;
    class IConfigManager *m_pConfigManager = nullptr;
    class CConfig *m_pConfig = nullptr;
    class IConsole *m_pConsole = nullptr;
    class IEngine *m_pEngine = nullptr;
    class IGraphics *m_pGraphics = nullptr;
    class ITextRender *m_pTextRender = nullptr;
    class ISound *m_pSound = nullptr;
    class IStorage *m_pStorage = nullptr;
    CRenderTools m_RenderTools;
    CUi m_UI;
 
    std::vector<std::reference_wrapper<CEditorComponent>> m_vComponents;
    CMapView m_MapView;
    CLayerSelector m_LayerSelector;
    CPrompt m_Prompt;
 
    bool m_EditorWasUsedBefore = false;
 
    IGraphics::CTextureHandle m_EntitiesTexture;
 
    IGraphics::CTextureHandle m_FrontTexture;
    IGraphics::CTextureHandle m_TeleTexture;
    IGraphics::CTextureHandle m_SpeedupTexture;
    IGraphics::CTextureHandle m_SwitchTexture;
    IGraphics::CTextureHandle m_TuneTexture;
 
    int GetTextureUsageFlag() const;
 
    enum EPreviewState
    {
        PREVIEW_UNLOADED,
        PREVIEW_LOADED,
        PREVIEW_ERROR,
    };
 
    std::shared_ptr<CLayerGroup> m_apSavedBrushes[10];
    static const ColorRGBA ms_DefaultPropColor;
 
public:
    class IInput *Input() const { return m_pInput; }
    class IClient *Client() const { return m_pClient; }
    class IConfigManager *ConfigManager() const { return m_pConfigManager; }
    class CConfig *Config() const { return m_pConfig; }
    class IConsole *Console() const { return m_pConsole; }
    class IEngine *Engine() const { return m_pEngine; }
    class IGraphics *Graphics() const { return m_pGraphics; }
    class ISound *Sound() const { return m_pSound; }
    class ITextRender *TextRender() const { return m_pTextRender; }
    class IStorage *Storage() const { return m_pStorage; }
    CUi *Ui() { return &m_UI; }
    CRenderTools *RenderTools() { return &m_RenderTools; }
 
    CMapView *MapView() { return &m_MapView; }
    const CMapView *MapView() const { return &m_MapView; }
    CLayerSelector *LayerSelector() { return &m_LayerSelector; }
 
    void SelectNextLayer();
    void SelectPreviousLayer();
 
    void FillGameTiles(EGameTileOp FillTile) const;
    bool CanFillGameTiles() const;
    void AddQuadOrSound();
    void AddGroup();
    void AddSoundLayer();
    void AddTileLayer();
    void AddQuadsLayer();
    void AddSwitchLayer();
    void AddFrontLayer();
    void AddTuneLayer();
    void AddSpeedupLayer();
    void AddTeleLayer();
    void DeleteSelectedLayer();
    void LayerSelectImage();
    bool IsNonGameTileLayerSelected() const;
    void MapDetails();
#define REGISTER_QUICK_ACTION(name, text, callback, disabled, active, button_color, description) CQuickAction m_QuickAction##name;
#include <game/editor/quick_actions.h>
#undef REGISTER_QUICK_ACTION
 
    CEditor() :
#define REGISTER_QUICK_ACTION(name, text, callback, disabled, active, button_color, description) m_QuickAction##name(text, description, callback, disabled, active, button_color),
#include <game/editor/quick_actions.h>
#undef REGISTER_QUICK_ACTION
        m_ZoomEnvelopeX(1.0f, 0.1f, 600.0f),
        m_ZoomEnvelopeY(640.0f, 0.1f, 32000.0f),
        m_MapSettingsCommandContext(m_MapSettingsBackend.NewContext(&m_SettingsCommandInput))
    {
        m_EntitiesTexture.Invalidate();
        m_FrontTexture.Invalidate();
        m_TeleTexture.Invalidate();
        m_SpeedupTexture.Invalidate();
        m_SwitchTexture.Invalidate();
        m_TuneTexture.Invalidate();
 
        m_Mode = MODE_LAYERS;
        m_Dialog = 0;
 
        m_BrushColorEnabled = true;
 
        m_aFileName[0] = '\0';
        m_aFileNamePending[0] = '\0';
        m_aFileSaveName[0] = '\0';
        m_ValidSaveFilename = false;
 
        m_PopupEventActivated = false;
        m_PopupEventWasActivated = false;
 
        m_FileDialogStorageType = 0;
        m_FileDialogLastPopulatedStorageType = 0;
        m_FileDialogSaveAction = false;
        m_pFileDialogTitle = nullptr;
        m_pFileDialogButtonText = nullptr;
        m_pFileDialogUser = nullptr;
        m_aFileDialogCurrentFolder[0] = '\0';
        m_aFileDialogCurrentLink[0] = '\0';
        m_aFilesSelectedName[0] = '\0';
        m_pFileDialogPath = m_aFileDialogCurrentFolder;
        m_FileDialogOpening = false;
        m_FilesSelectedIndex = -1;
 
        m_FilePreviewImage.Invalidate();
        m_FilePreviewSound = -1;
        m_FilePreviewState = PREVIEW_UNLOADED;
 
        m_ToolbarPreviewSound = -1;
 
        m_SelectEntitiesImage = "DDNet";
 
        m_ResetZoomEnvelope = true;
        m_OffsetEnvelopeX = 0.1f;
        m_OffsetEnvelopeY = 0.5f;
 
        m_ShowMousePointer = true;
 
        m_GuiActive = true;
        m_PreviewZoom = false;
 
        m_ShowTileInfo = SHOW_TILE_OFF;
        m_ShowDetail = true;
        m_Animate = false;
        m_AnimateStart = 0;
        m_AnimateTime = 0;
        m_AnimateSpeed = 1;
        m_AnimateUpdatePopup = false;
 
        m_ShowEnvelopePreview = SHOWENV_NONE;
        m_SelectedQuadEnvelope = -1;
 
        m_vSelectedEnvelopePoints = {};
        m_UpdateEnvPointInfo = false;
        m_SelectedTangentInPoint = std::pair(-1, -1);
        m_SelectedTangentOutPoint = std::pair(-1, -1);
        m_CurrentQuadIndex = -1;
 
        m_QuadKnifeActive = false;
        m_QuadKnifeCount = 0;
        mem_zero(m_aQuadKnifePoints, sizeof(m_aQuadKnifePoints));
 
        for(size_t i = 0; i < std::size(m_aSavedColors); ++i)
        {
            m_aSavedColors[i] = color_cast<ColorRGBA>(ColorHSLA(i / (float)std::size(m_aSavedColors), 1.0f, 0.5f));
        }
 
        m_CheckerTexture.Invalidate();
        for(auto &CursorTexture : m_aCursorTextures)
            CursorTexture.Invalidate();
 
        m_CursorType = CURSOR_NORMAL;
 
        ms_pUiGotContext = nullptr;
 
        // DDRace
 
        m_TeleNumber = 1;
        m_TeleCheckpointNumber = 1;
        m_ViewTeleNumber = 0;
 
        m_SwitchNum = 1;
        m_TuningNum = 1;
        m_SwitchDelay = 0;
        m_SpeedupForce = 50;
        m_SpeedupMaxSpeed = 0;
        m_SpeedupAngle = 0;
        m_LargeLayerWasWarned = false;
        m_PreventUnusedTilesWasWarned = false;
        m_AllowPlaceUnusedTiles = 0;
        m_BrushDrawDestructive = true;
    }
 
    class CHoverTile
    {
    public:
        CHoverTile(int Group, int Layer, int x, int y, const CTile Tile) :
            m_Group(Group),
            m_Layer(Layer),
            m_X(x),
            m_Y(y),
            m_Tile(Tile)
        {
        }
 
        int m_Group;
        int m_Layer;
        int m_X;
        int m_Y;
        const CTile m_Tile;
    };
    std::vector<CHoverTile> m_vHoverTiles;
    const std::vector<CHoverTile> &HoverTiles() const { return m_vHoverTiles; }
 
    void Init() override;
    void OnUpdate() override;
    void OnRender() override;
    void OnActivate() override;
    void OnWindowResize() override;
    void OnClose() override;
    void OnDialogClose() override;
    bool HasUnsavedData() const override { return m_Map.m_Modified; }
    void UpdateMentions() override { m_Mentions++; }
    void ResetMentions() override { m_Mentions = 0; }
    void OnIngameMoved() override { m_IngameMoved = true; }
    void ResetIngameMoved() override { m_IngameMoved = false; }
 
    void HandleCursorMovement();
    void OnMouseMove(vec2 MousePos);
    void HandleAutosave();
    bool PerformAutosave();
    void HandleWriterFinishJobs();
 
    void RefreshFilteredFileList();
    void FilelistPopulate(int StorageType, bool KeepSelection = false);
    void InvokeFileDialog(int StorageType, int FileType, const char *pTitle, const char *pButtonText,
        const char *pBasepath, bool FilenameAsDefault,
        bool (*pfnFunc)(const char *pFilename, int StorageType, void *pUser), void *pUser);
    struct SStringKeyComparator
    {
        bool operator()(const char *pLhs, const char *pRhs) const
        {
            return str_comp(pLhs, pRhs) < 0;
        }
    };
    std::map<const char *, CUi::SMessagePopupContext *, SStringKeyComparator> m_PopupMessageContexts;
    void ShowFileDialogError(const char *pFormat, ...)
        GNUC_ATTRIBUTE((format(printf, 2, 3)));
 
    void Reset(bool CreateDefault = true);
    bool Save(const char *pFilename) override;
    bool Load(const char *pFilename, int StorageType) override;
    bool HandleMapDrop(const char *pFilename, int StorageType) override;
    bool Append(const char *pFilename, int StorageType, bool IgnoreHistory = false);
    void LoadCurrentMap();
    void Render();
 
    void RenderPressedKeys(CUIRect View);
    void RenderSavingIndicator(CUIRect View);
    void FreeDynamicPopupMenus();
    void UpdateColorPipette();
    void RenderMousePointer();
 
    std::vector<CQuad *> GetSelectedQuads();
    std::shared_ptr<CLayer> GetSelectedLayerType(int Index, int Type) const;
    std::shared_ptr<CLayer> GetSelectedLayer(int Index) const;
    std::shared_ptr<CLayerGroup> GetSelectedGroup() const;
    CSoundSource *GetSelectedSource() const;
    void SelectLayer(int LayerIndex, int GroupIndex = -1);
    void AddSelectedLayer(int LayerIndex);
    void SelectQuad(int Index);
    void ToggleSelectQuad(int Index);
    void DeselectQuads();
    void DeselectQuadPoints();
    void SelectQuadPoint(int QuadIndex, int Index);
    void ToggleSelectQuadPoint(int QuadIndex, int Index);
    void DeleteSelectedQuads();
    bool IsQuadSelected(int Index) const;
    bool IsQuadCornerSelected(int Index) const;
    bool IsQuadPointSelected(int QuadIndex, int Index) const;
    int FindSelectedQuadIndex(int Index) const;
 
    int FindEnvPointIndex(int Index, int Channel) const;
    void SelectEnvPoint(int Index);
    void SelectEnvPoint(int Index, int Channel);
    void ToggleEnvPoint(int Index, int Channel);
    bool IsEnvPointSelected(int Index, int Channel) const;
    bool IsEnvPointSelected(int Index) const;
    void DeselectEnvPoints();
    void SelectTangentOutPoint(int Index, int Channel);
    bool IsTangentOutPointSelected(int Index, int Channel) const;
    void SelectTangentInPoint(int Index, int Channel);
    bool IsTangentInPointSelected(int Index, int Channel) const;
    bool IsTangentInSelected() const;
    bool IsTangentOutSelected() const;
    bool IsTangentSelected() const;
    std::pair<int, int> EnvGetSelectedTimeAndValue() const;
 
    template<typename E>
    SEditResult<E> DoPropertiesWithState(CUIRect *pToolbox, CProperty *pProps, int *pIds, int *pNewVal, const std::vector<ColorRGBA> &vColors = {});
    int DoProperties(CUIRect *pToolbox, CProperty *pProps, int *pIds, int *pNewVal, const std::vector<ColorRGBA> &vColors = {});
 
    CUi::SColorPickerPopupContext m_ColorPickerPopupContext;
    const void *m_pColorPickerPopupActiveId = nullptr;
    void DoColorPickerButton(const void *pId, const CUIRect *pRect, ColorRGBA Color, const std::function<void(ColorRGBA Color)> &SetColor);
 
    int m_Mode;
    int m_Dialog;
    char m_aTooltip[256] = "";
 
    bool m_BrushColorEnabled;
 
    char m_aFileName[IO_MAX_PATH_LENGTH];
    char m_aFileNamePending[IO_MAX_PATH_LENGTH];
    char m_aFileSaveName[IO_MAX_PATH_LENGTH];
    bool m_ValidSaveFilename;
 
    enum
    {
        POPEVENT_EXIT = 0,
        POPEVENT_LOAD,
        POPEVENT_LOADCURRENT,
        POPEVENT_LOADDROP,
        POPEVENT_NEW,
        POPEVENT_SAVE,
        POPEVENT_SAVE_COPY,
        POPEVENT_SAVE_IMG,
        POPEVENT_SAVE_SOUND,
        POPEVENT_LARGELAYER,
        POPEVENT_PREVENTUNUSEDTILES,
        POPEVENT_IMAGEDIV16,
        POPEVENT_IMAGE_MAX,
        POPEVENT_SOUND_MAX,
        POPEVENT_PLACE_BORDER_TILES,
        POPEVENT_PIXELART_BIG_IMAGE,
        POPEVENT_PIXELART_MANY_COLORS,
        POPEVENT_PIXELART_TOO_MANY_COLORS,
        POPEVENT_REMOVE_USED_IMAGE,
        POPEVENT_REMOVE_USED_SOUND,
    };
 
    int m_PopupEventType;
    int m_PopupEventActivated;
    int m_PopupEventWasActivated;
    bool m_LargeLayerWasWarned;
    bool m_PreventUnusedTilesWasWarned;
    int m_AllowPlaceUnusedTiles;
    bool m_BrushDrawDestructive;
 
    int m_Mentions = 0;
    bool m_IngameMoved = false;
 
    enum
    {
        FILETYPE_MAP,
        FILETYPE_IMG,
        FILETYPE_SOUND,
        NUM_FILETYPES
    };
 
    int m_FileDialogStorageType;
    int m_FileDialogLastPopulatedStorageType;
    bool m_FileDialogSaveAction;
    const char *m_pFileDialogTitle;
    const char *m_pFileDialogButtonText;
    bool (*m_pfnFileDialogFunc)(const char *pFileName, int StorageType, void *pUser);
    void *m_pFileDialogUser;
    CLineInputBuffered<IO_MAX_PATH_LENGTH> m_FileDialogFileNameInput;
    char m_aFileDialogCurrentFolder[IO_MAX_PATH_LENGTH];
    char m_aFileDialogCurrentLink[IO_MAX_PATH_LENGTH];
    char m_aFilesSelectedName[IO_MAX_PATH_LENGTH];
    CLineInputBuffered<IO_MAX_PATH_LENGTH> m_FileDialogFilterInput;
    char *m_pFileDialogPath;
    int m_FileDialogFileType;
    bool m_FileDialogMultipleStorages = false;
    bool m_FileDialogShowingRoot = false;
    int m_FilesSelectedIndex;
    CLineInputBuffered<IO_MAX_PATH_LENGTH> m_FileDialogNewFolderNameInput;
 
    IGraphics::CTextureHandle m_FilePreviewImage;
    int m_FilePreviewSound;
    EPreviewState m_FilePreviewState;
    int m_FilePreviewImageWidth;
    int m_FilePreviewImageHeight;
    bool m_FileDialogOpening;
 
    int m_ToolbarPreviewSound;
 
    struct CFilelistItem
    {
        char m_aFilename[IO_MAX_PATH_LENGTH];
        char m_aName[IO_MAX_PATH_LENGTH];
        bool m_IsDir;
        bool m_IsLink;
        int m_StorageType;
        time_t m_TimeModified;
    };
    std::vector<CFilelistItem> m_vCompleteFileList;
    std::vector<const CFilelistItem *> m_vpFilteredFileList;
 
    static bool CompareFilenameAscending(const CFilelistItem *pLhs, const CFilelistItem *pRhs)
    {
        if(str_comp(pLhs->m_aFilename, "..") == 0)
            return true;
        if(str_comp(pRhs->m_aFilename, "..") == 0)
            return false;
        if(pLhs->m_IsLink != pRhs->m_IsLink)
            return pLhs->m_IsLink;
        if(pLhs->m_IsDir != pRhs->m_IsDir)
            return pLhs->m_IsDir;
        return str_comp_filenames(pLhs->m_aName, pRhs->m_aName) < 0;
    }
 
    static bool CompareFilenameDescending(const CFilelistItem *pLhs, const CFilelistItem *pRhs)
    {
        if(str_comp(pLhs->m_aFilename, "..") == 0)
            return true;
        if(str_comp(pRhs->m_aFilename, "..") == 0)
            return false;
        if(pLhs->m_IsLink != pRhs->m_IsLink)
            return pLhs->m_IsLink;
        if(pLhs->m_IsDir != pRhs->m_IsDir)
            return pLhs->m_IsDir;
        return str_comp_filenames(pLhs->m_aName, pRhs->m_aName) > 0;
    }
 
    static bool CompareTimeModifiedAscending(const CFilelistItem *pLhs, const CFilelistItem *pRhs)
    {
        if(str_comp(pLhs->m_aFilename, "..") == 0)
            return true;
        if(str_comp(pRhs->m_aFilename, "..") == 0)
            return false;
        if(pLhs->m_IsLink || pRhs->m_IsLink)
            return pLhs->m_IsLink;
        if(pLhs->m_IsDir != pRhs->m_IsDir)
            return pLhs->m_IsDir;
        return pLhs->m_TimeModified < pRhs->m_TimeModified;
    }
 
    static bool CompareTimeModifiedDescending(const CFilelistItem *pLhs, const CFilelistItem *pRhs)
    {
        if(str_comp(pLhs->m_aFilename, "..") == 0)
            return true;
        if(str_comp(pRhs->m_aFilename, "..") == 0)
            return false;
        if(pLhs->m_IsLink || pRhs->m_IsLink)
            return pLhs->m_IsLink;
        if(pLhs->m_IsDir != pRhs->m_IsDir)
            return pLhs->m_IsDir;
        return pLhs->m_TimeModified > pRhs->m_TimeModified;
    }
 
    void SortFilteredFileList();
    int m_SortByFilename = 1;
    int m_SortByTimeModified = 0;
 
    std::vector<std::string> m_vSelectEntitiesFiles;
    std::string m_SelectEntitiesImage;
 
    // Zooming
    CSmoothValue m_ZoomEnvelopeX;
    CSmoothValue m_ZoomEnvelopeY;
 
    bool m_ResetZoomEnvelope;
 
    float m_OffsetEnvelopeX;
    float m_OffsetEnvelopeY;
 
    bool m_ShowMousePointer;
    bool m_GuiActive;
 
    char m_aMenuBackgroundTooltip[256];
    bool m_PreviewZoom;
    float m_MouseWorldScale = 1.0f; // Mouse (i.e. UI) scale relative to the World (selected Group)
    vec2 m_MouseWorldPos = vec2(0.0f, 0.0f);
    vec2 m_MouseWorldNoParaPos = vec2(0.0f, 0.0f);
    vec2 m_MouseDeltaWorld = vec2(0.0f, 0.0f);
    const void *m_pContainerPanned;
    const void *m_pContainerPannedLast;
    char m_MapEditorId; // UI element ID for the main map editor
 
    enum EShowTile
    {
        SHOW_TILE_OFF,
        SHOW_TILE_DECIMAL,
        SHOW_TILE_HEXADECIMAL
    };
    EShowTile m_ShowTileInfo;
    bool m_ShowDetail;
 
    bool m_Animate;
    int64_t m_AnimateStart;
    float m_AnimateTime;
    float m_AnimateSpeed;
    bool m_AnimateUpdatePopup;
 
    enum EExtraEditor
    {
        EXTRAEDITOR_NONE = -1,
        EXTRAEDITOR_ENVELOPES,
        EXTRAEDITOR_SERVER_SETTINGS,
        EXTRAEDITOR_HISTORY,
        NUM_EXTRAEDITORS,
    };
    EExtraEditor m_ActiveExtraEditor = EXTRAEDITOR_NONE;
    float m_aExtraEditorSplits[NUM_EXTRAEDITORS] = {250.0f, 250.0f, 250.0f};
    float m_ToolBoxWidth = 100.0f;
 
    enum EShowEnvelope
    {
        SHOWENV_NONE = 0,
        SHOWENV_SELECTED,
        SHOWENV_ALL
    };
    EShowEnvelope m_ShowEnvelopePreview;
    bool m_ShowPicker;
 
    std::vector<int> m_vSelectedLayers;
    std::vector<int> m_vSelectedQuads;
    int m_SelectedQuadPoint;
    int m_SelectedQuadIndex;
    int m_SelectedGroup;
    int m_SelectedQuadPoints;
    int m_SelectedEnvelope;
    std::vector<std::pair<int, int>> m_vSelectedEnvelopePoints;
    int m_SelectedQuadEnvelope;
    int m_CurrentQuadIndex;
    int m_SelectedImage;
    int m_SelectedSound;
    int m_SelectedSource;
    std::pair<int, int> m_SelectedTangentInPoint;
    std::pair<int, int> m_SelectedTangentOutPoint;
    bool m_UpdateEnvPointInfo;
 
    bool m_QuadKnifeActive;
    int m_QuadKnifeCount;
    vec2 m_aQuadKnifePoints[4];
 
    // Color palette and pipette
    ColorRGBA m_aSavedColors[8];
    ColorRGBA m_PipetteColor = ColorRGBA(1.0f, 1.0f, 1.0f, 1.0f);
    bool m_ColorPipetteActive = false;
 
    IGraphics::CTextureHandle m_CheckerTexture;
 
    enum ECursorType
    {
        CURSOR_NORMAL,
        CURSOR_RESIZE_V,
        CURSOR_RESIZE_H,
        NUM_CURSORS
    };
    IGraphics::CTextureHandle m_aCursorTextures[ECursorType::NUM_CURSORS];
    ECursorType m_CursorType;
 
    IGraphics::CTextureHandle GetEntitiesTexture();
 
    std::shared_ptr<CLayerGroup> m_pBrush;
    std::shared_ptr<CLayerTiles> m_pTilesetPicker;
    std::shared_ptr<CLayerQuads> m_pQuadsetPicker;
 
    static const void *ms_pUiGotContext;
 
    CEditorMap m_Map;
    std::deque<std::shared_ptr<CDataFileWriterFinishJob>> m_WriterFinishJobs;
 
    int m_ShiftBy;
 
    static void EnvelopeEval(int TimeOffsetMillis, int Env, ColorRGBA &Result, size_t Channels, void *pUser);
 
    CLineInputBuffered<256> m_SettingsCommandInput;
    CMapSettingsBackend m_MapSettingsBackend;
    CMapSettingsBackend::CContext m_MapSettingsCommandContext;
 
    CImageInfo m_TileartImageInfo;
    char m_aTileartFilename[IO_MAX_PATH_LENGTH];
    void AddTileart(bool IgnoreHistory = false);
    void TileartCheckColors();
 
    void PlaceBorderTiles();
 
    void UpdateTooltip(const void *pId, const CUIRect *pRect, const char *pToolTip);
    int DoButton_Editor_Common(const void *pId, const char *pText, int Checked, const CUIRect *pRect, int Flags, const char *pToolTip);
    int DoButton_Editor(const void *pId, const char *pText, int Checked, const CUIRect *pRect, int Flags, const char *pToolTip);
    int DoButton_Env(const void *pId, const char *pText, int Checked, const CUIRect *pRect, const char *pToolTip, ColorRGBA Color, int Corners);
 
    int DoButton_Ex(const void *pId, const char *pText, int Checked, const CUIRect *pRect, int Flags, const char *pToolTip, int Corners, float FontSize = EditorFontSizes::MENU, int Align = TEXTALIGN_MC);
    int DoButton_FontIcon(const void *pId, const char *pText, int Checked, const CUIRect *pRect, int Flags, const char *pToolTip, int Corners, float FontSize = 10.0f);
    int DoButton_MenuItem(const void *pId, const char *pText, int Checked, const CUIRect *pRect, int Flags = 0, const char *pToolTip = nullptr);
 
    int DoButton_DraggableEx(const void *pId, const char *pText, int Checked, const CUIRect *pRect, bool *pClicked, bool *pAbrupted, int Flags, const char *pToolTip = nullptr, int Corners = IGraphics::CORNER_ALL, float FontSize = 10.0f);
 
    bool DoEditBox(CLineInput *pLineInput, const CUIRect *pRect, float FontSize, int Corners = IGraphics::CORNER_ALL, const char *pToolTip = nullptr, const std::vector<STextColorSplit> &vColorSplits = {});
    bool DoClearableEditBox(CLineInput *pLineInput, const CUIRect *pRect, float FontSize, int Corners = IGraphics::CORNER_ALL, const char *pToolTip = nullptr, const std::vector<STextColorSplit> &vColorSplits = {});
 
    void DoMapSettingsEditBox(CMapSettingsBackend::CContext *pContext, const CUIRect *pRect, float FontSize, float DropdownMaxHeight, int Corners = IGraphics::CORNER_ALL, const char *pToolTip = nullptr);
 
    template<typename T>
    int DoEditBoxDropdown(SEditBoxDropdownContext *pDropdown, CLineInput *pLineInput, const CUIRect *pEditBoxRect, int x, float MaxHeight, bool AutoWidth, const std::vector<T> &vData, const FDropdownRenderCallback<T> &pfnMatchCallback);
    template<typename T>
    int RenderEditBoxDropdown(SEditBoxDropdownContext *pDropdown, CUIRect View, CLineInput *pLineInput, int x, float MaxHeight, bool AutoWidth, const std::vector<T> &vData, const FDropdownRenderCallback<T> &pfnMatchCallback);
 
    void RenderBackground(CUIRect View, IGraphics::CTextureHandle Texture, float Size, float Brightness) const;
 
    SEditResult<int> UiDoValueSelector(void *pId, CUIRect *pRect, const char *pLabel, int Current, int Min, int Max, int Step, float Scale, const char *pToolTip, bool IsDegree = false, bool IsHex = false, int Corners = IGraphics::CORNER_ALL, const ColorRGBA *pColor = nullptr, bool ShowValue = true);
 
    static CUi::EPopupMenuFunctionResult PopupMenuFile(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupMenuTools(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupMenuSettings(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupGroup(void *pContext, CUIRect View, bool Active);
    struct SLayerPopupContext : public SPopupMenuId
    {
        CEditor *m_pEditor;
        std::vector<std::shared_ptr<CLayerTiles>> m_vpLayers;
        std::vector<int> m_vLayerIndices;
        CLayerTiles::SCommonPropState m_CommonPropState;
    };
    static CUi::EPopupMenuFunctionResult PopupLayer(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupQuad(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSource(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupPoint(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupEnvPoint(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupEnvPointMulti(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupEnvPointCurveType(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupImage(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSound(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupNewFolder(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupMapInfo(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupEvent(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSelectImage(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSelectSound(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSelectGametileOp(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSelectConfigAutoMap(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupTele(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSpeedup(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupSwitch(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupTune(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupGoto(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupEntities(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupProofMode(void *pContext, CUIRect View, bool Active);
    static CUi::EPopupMenuFunctionResult PopupAnimateSettings(void *pContext, CUIRect View, bool Active);
    int m_PopupEnvelopeSelectedPoint = -1;
    static CUi::EPopupMenuFunctionResult PopupEnvelopeCurvetype(void *pContext, CUIRect View, bool Active);
 
    static bool CallbackOpenMap(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackAppendMap(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackSaveMap(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackSaveCopyMap(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackAddTileart(const char *pFilepath, int StorageType, void *pUser);
    static bool CallbackSaveImage(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackSaveSound(const char *pFileName, int StorageType, void *pUser);
    static bool CallbackCustomEntities(const char *pFileName, int StorageType, void *pUser);
 
    void PopupSelectImageInvoke(int Current, float x, float y);
    int PopupSelectImageResult();
 
    void PopupSelectGametileOpInvoke(float x, float y);
    int PopupSelectGameTileOpResult();
 
    void PopupSelectConfigAutoMapInvoke(int Current, float x, float y);
    int PopupSelectConfigAutoMapResult();
 
    void PopupSelectSoundInvoke(int Current, float x, float y);
    int PopupSelectSoundResult();
 
    void DoQuadEnvelopes(const std::vector<CQuad> &vQuads, IGraphics::CTextureHandle Texture = IGraphics::CTextureHandle());
    void DoQuadEnvPoint(const CQuad *pQuad, int QIndex, int pIndex);
    void DoQuadPoint(int LayerIndex, const std::shared_ptr<CLayerQuads> &pLayer, CQuad *pQuad, int QuadIndex, int v);
    void SetHotQuadPoint(const std::shared_ptr<CLayerQuads> &pLayer);
 
    float TriangleArea(vec2 A, vec2 B, vec2 C);
    bool IsInTriangle(vec2 Point, vec2 A, vec2 B, vec2 C);
    void DoQuadKnife(int QuadIndex);
 
    void DoSoundSource(int LayerIndex, CSoundSource *pSource, int Index);
 
    enum class EAxis
    {
        AXIS_NONE = 0,
        AXIS_X,
        AXIS_Y
    };
    struct SAxisAlignedBoundingBox
    {
        enum
        {
            POINT_TL = 0,
            POINT_TR,
            POINT_BL,
            POINT_BR,
            POINT_CENTER,
            NUM_POINTS
        };
        CPoint m_aPoints[NUM_POINTS];
    };
    void DoMapEditor(CUIRect View);
    void DoToolbarLayers(CUIRect Toolbar);
    void DoToolbarImages(CUIRect Toolbar);
    void DoToolbarSounds(CUIRect Toolbar);
    void DoQuad(int LayerIndex, const std::shared_ptr<CLayerQuads> &pLayer, CQuad *pQuad, int Index);
    void PreparePointDrag(const std::shared_ptr<CLayerQuads> &pLayer, CQuad *pQuad, int QuadIndex, int PointIndex);
    void DoPointDrag(const std::shared_ptr<CLayerQuads> &pLayer, CQuad *pQuad, int QuadIndex, int PointIndex, int OffsetX, int OffsetY);
    EAxis GetDragAxis(int OffsetX, int OffsetY) const;
    void DrawAxis(EAxis Axis, CPoint &OriginalPoint, CPoint &Point) const;
    void DrawAABB(const SAxisAlignedBoundingBox &AABB, int OffsetX = 0, int OffsetY = 0) const;
    ColorRGBA GetButtonColor(const void *pId, int Checked);
 
    // Alignment methods
    // These methods take `OffsetX` and `OffsetY` because the calculations are made with the original positions
    // of the quad(s), before we started dragging. This allows us to edit `OffsetX` and `OffsetY` based on the previously
    // calculated alignments.
    struct SAlignmentInfo
    {
        CPoint m_AlignedPoint; // The "aligned" point, which we want to align/snap to
        union
        {
            // The current changing value when aligned to this point. When aligning to a point on the X axis, then the X value is changing because
            // we aligned the Y values (X axis aligned => Y values are the same, Y axis aligned => X values are the same).
            int m_X;
            int m_Y;
        };
        EAxis m_Axis; // The axis we are aligning on
        int m_PointIndex; // The point index we are aligning
        int m_Diff; // Store the difference
    };
    void ComputePointAlignments(const std::shared_ptr<CLayerQuads> &pLayer, CQuad *pQuad, int QuadIndex, int PointIndex, int OffsetX, int OffsetY, std::vector<SAlignmentInfo> &vAlignments, bool Append = false) const;
    void ComputePointsAlignments(const std::shared_ptr<CLayerQuads> &pLayer, bool Pivot, int OffsetX, int OffsetY, std::vector<SAlignmentInfo> &vAlignments) const;
    void ComputeAABBAlignments(const std::shared_ptr<CLayerQuads> &pLayer, const SAxisAlignedBoundingBox &AABB, int OffsetX, int OffsetY, std::vector<SAlignmentInfo> &vAlignments) const;
    void DrawPointAlignments(const std::vector<SAlignmentInfo> &vAlignments, int OffsetX, int OffsetY) const;
    void QuadSelectionAABB(const std::shared_ptr<CLayerQuads> &pLayer, SAxisAlignedBoundingBox &OutAABB);
    void ApplyAlignments(const std::vector<SAlignmentInfo> &vAlignments, int &OffsetX, int &OffsetY);
    void ApplyAxisAlignment(int &OffsetX, int &OffsetY) const;
 
    bool ReplaceImage(const char *pFilename, int StorageType, bool CheckDuplicate);
    static bool ReplaceImageCallback(const char *pFilename, int StorageType, void *pUser);
    bool ReplaceSound(const char *pFileName, int StorageType, bool CheckDuplicate);
    static bool ReplaceSoundCallback(const char *pFileName, int StorageType, void *pUser);
    static bool AddImage(const char *pFilename, int StorageType, void *pUser);
    static bool AddSound(const char *pFileName, int StorageType, void *pUser);
    static bool IsAssetUsed(int FileType, int Index, void *pUser);
 
    bool IsEnvelopeUsed(int EnvelopeIndex) const;
    void RemoveUnusedEnvelopes();
 
    static bool IsVanillaImage(const char *pImage);
 
    void RenderLayers(CUIRect LayersBox);
    void RenderImagesList(CUIRect Toolbox);
    void RenderSelectedImage(CUIRect View);
    void RenderSounds(CUIRect Toolbox);
    void RenderModebar(CUIRect View);
    void RenderStatusbar(CUIRect View, CUIRect *pTooltipRect);
    void RenderTooltip(CUIRect TooltipRect);
 
    void RenderEnvelopeEditor(CUIRect View);
 
    void RenderMapSettingsErrorDialog();
    void RenderServerSettingsEditor(CUIRect View, bool ShowServerSettingsEditorLast);
    static void MapSettingsDropdownRenderCallback(const SPossibleValueMatch &Match, char (&aOutput)[128], std::vector<STextColorSplit> &vColorSplits);
 
    void RenderEditorHistory(CUIRect View);
 
    enum class EDragSide // Which side is the drag bar on
    {
        SIDE_BOTTOM,
        SIDE_LEFT,
        SIDE_TOP,
        SIDE_RIGHT
    };
    void DoEditorDragBar(CUIRect View, CUIRect *pDragBar, EDragSide Side, float *pValue, float MinValue = 100.0f, float MaxValue = 400.0f);
 
    void SetHotEnvelopePoint(const CUIRect &View, const std::shared_ptr<CEnvelope> &pEnvelope, int ActiveChannels);
 
    void RenderMenubar(CUIRect Menubar);
    void RenderFileDialog();
 
    void SelectGameLayer();
    std::vector<int> SortImages();
 
    void DoAudioPreview(CUIRect View, const void *pPlayPauseButtonId, const void *pStopButtonId, const void *pSeekBarId, int SampleId);
 
    // Tile Numbers For Explanations - TODO: Add/Improve tiles and explanations
    enum
    {
        TILE_PUB_AIR,
        TILE_PUB_HOOKABLE,
        TILE_PUB_DEATH,
        TILE_PUB_UNHOOKABLE,
 
        TILE_PUB_CREDITS1 = 140,
        TILE_PUB_CREDITS2,
        TILE_PUB_CREDITS3,
        TILE_PUB_CREDITS4,
        TILE_PUB_CREDITS5 = 156,
        TILE_PUB_CREDITS6,
        TILE_PUB_CREDITS7,
        TILE_PUB_CREDITS8,
 
        TILE_PUB_ENTITIES_OFF1 = 190,
        TILE_PUB_ENTITIES_OFF2,
    };
 
    enum
    {
        TILE_FNG_SPIKE_GOLD = 7,
        TILE_FNG_SPIKE_NORMAL,
        TILE_FNG_SPIKE_RED,
        TILE_FNG_SPIKE_BLUE,
        TILE_FNG_SCORE_RED,
        TILE_FNG_SCORE_BLUE,
 
        TILE_FNG_SPIKE_GREEN = 14,
        TILE_FNG_SPIKE_PURPLE,
 
        TILE_FNG_SPAWN = 192,
        TILE_FNG_SPAWN_RED,
        TILE_FNG_SPAWN_BLUE,
        TILE_FNG_FLAG_RED,
        TILE_FNG_FLAG_BLUE,
        TILE_FNG_SHIELD,
        TILE_FNG_HEART,
        TILE_FNG_SHOTGUN,
        TILE_FNG_GRENADE,
        TILE_FNG_NINJA,
        TILE_FNG_LASER,
 
        TILE_FNG_SPIKE_OLD1 = 208,
        TILE_FNG_SPIKE_OLD2,
        TILE_FNG_SPIKE_OLD3
    };
 
    enum
    {
        TILE_VANILLA_SPAWN = 192,
        TILE_VANILLA_SPAWN_RED,
        TILE_VANILLA_SPAWN_BLUE,
        TILE_VANILLA_FLAG_RED,
        TILE_VANILLA_FLAG_BLUE,
        TILE_VANILLA_SHIELD,
        TILE_VANILLA_HEART,
        TILE_VANILLA_SHOTGUN,
        TILE_VANILLA_GRENADE,
        TILE_VANILLA_NINJA,
        TILE_VANILLA_LASER,
    };
 
    // Explanations
    enum class EExplanation
    {
        NONE,
        DDNET,
        FNG,
        RACE,
        VANILLA,
        BLOCKWORLDS
    };
    static const char *ExplainDDNet(int Tile, int Layer);
    static const char *ExplainFNG(int Tile, int Layer);
    static const char *ExplainVanilla(int Tile, int Layer);
    static const char *Explain(EExplanation Explanation, int Tile, int Layer);
 
    // Zooming
    void ZoomAdaptOffsetX(float ZoomFactor, const CUIRect &View);
    void UpdateZoomEnvelopeX(const CUIRect &View);
 
    void ZoomAdaptOffsetY(float ZoomFactor, const CUIRect &View);
    void UpdateZoomEnvelopeY(const CUIRect &View);
 
    void ResetZoomEnvelope(const std::shared_ptr<CEnvelope> &pEnvelope, int ActiveChannels);
    void RemoveTimeOffsetEnvelope(const std::shared_ptr<CEnvelope> &pEnvelope);
    float ScreenToEnvelopeX(const CUIRect &View, float x) const;
    float EnvelopeToScreenX(const CUIRect &View, float x) const;
    float ScreenToEnvelopeY(const CUIRect &View, float y) const;
    float EnvelopeToScreenY(const CUIRect &View, float y) const;
    float ScreenToEnvelopeDX(const CUIRect &View, float DeltaX);
    float ScreenToEnvelopeDY(const CUIRect &View, float DeltaY);
 
    // DDRace
 
    IGraphics::CTextureHandle GetFrontTexture();
    IGraphics::CTextureHandle GetTeleTexture();
    IGraphics::CTextureHandle GetSpeedupTexture();
    IGraphics::CTextureHandle GetSwitchTexture();
    IGraphics::CTextureHandle GetTuneTexture();
 
    unsigned char m_TeleNumber;
    unsigned char m_TeleCheckpointNumber;
    unsigned char m_ViewTeleNumber;
 
    unsigned char m_TuningNum;
 
    unsigned char m_SpeedupForce;
    unsigned char m_SpeedupMaxSpeed;
    short m_SpeedupAngle;
 
    unsigned char m_SwitchNum;
    unsigned char m_SwitchDelay;
    unsigned char m_ViewSwitch;
 
    void AdjustBrushSpecialTiles(bool UseNextFree, int Adjust = 0);
    int FindNextFreeSwitchNumber();
    int FindNextFreeTeleNumber(bool Checkpoint = false);
 
    // Undo/Redo
    CEditorHistory m_EditorHistory;
    CEditorHistory m_ServerSettingsHistory;
    CEditorHistory m_EnvelopeEditorHistory;
    CQuadEditTracker m_QuadTracker;
    CEnvelopeEditorOperationTracker m_EnvOpTracker;
 
private:
    void UndoLastAction();
    void RedoLastAction();
 
    std::map<int, CPoint[5]> m_QuadDragOriginalPoints;
};
 
// make sure to inline this function
inline class IGraphics *CLayer::Graphics() { return m_pEditor->Graphics(); }
inline class ITextRender *CLayer::TextRender() { return m_pEditor->TextRender(); }
 
#endif