input.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 ENGINE_CLIENT_INPUT_H
#define ENGINE_CLIENT_INPUT_H
 
#include <engine/console.h>
#include <engine/input.h>
#include <engine/keys.h>
 
#include <SDL_events.h>
#include <SDL_joystick.h>
 
#include <string>
#include <vector>
 
class IEngineGraphics;
class IConfigManager;
 
class CInput : public IEngineInput
{
public:
    class CJoystick : public IJoystick
    {
        friend class CInput;
 
        CInput *m_pInput;
        int m_Index;
        char m_aName[64];
        char m_aGUID[34];
        SDL_JoystickID m_InstanceId;
        int m_NumAxes;
        int m_NumButtons;
        int m_NumBalls;
        int m_NumHats;
        SDL_Joystick *m_pDelegate;
 
        CInput *Input() { return m_pInput; }
 
    public:
        CJoystick(CInput *pInput, int Index, SDL_Joystick *pDelegate);
        ~CJoystick() override = default;
 
        int GetIndex() const override { return m_Index; }
        const char *GetName() const override { return m_aName; }
        const char *GetGUID() const { return m_aGUID; }
        SDL_JoystickID GetInstanceId() const { return m_InstanceId; }
        int GetNumAxes() const override { return m_NumAxes; }
        int GetNumButtons() const override { return m_NumButtons; }
        int GetNumBalls() const override { return m_NumBalls; }
        int GetNumHats() const override { return m_NumHats; }
        float GetAxisValue(int Axis) override;
        void GetHatValue(int Hat, int (&aHatKeys)[2]) override;
        bool Relative(float *pX, float *pY) override;
        bool Absolute(float *pX, float *pY) override;
 
        static void GetJoystickHatKeys(int Hat, int HatValue, int (&aHatKeys)[2]);
    };
 
private:
    IEngineGraphics *m_pGraphics;
    IConsole *m_pConsole;
    IConfigManager *m_pConfigManager;
 
    IEngineGraphics *Graphics() const { return m_pGraphics; }
    IConsole *Console() const { return m_pConsole; }
 
    // joystick
    std::vector<CJoystick> m_vJoysticks;
    CJoystick *m_pActiveJoystick = nullptr;
    void InitJoysticks();
    bool OpenJoystick(int JoystickIndex);
    void CloseJoysticks();
    void UpdateActiveJoystick();
    static void ConchainJoystickGuidChanged(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    float GetJoystickDeadzone();
 
    bool m_InputGrabbed;
 
    bool m_MouseFocus;
 
    // IME support
    std::string m_CompositionString;
    int m_CompositionCursor;
    std::vector<std::string> m_vCandidates;
    int m_CandidateSelectedIndex;
 
    // events
    std::vector<CEvent> m_vInputEvents;
    int64_t m_LastUpdate;
    float m_UpdateTime;
    void AddKeyEvent(int Key, int Flags);
    void AddTextEvent(const char *pText);
 
    // quick access to input
    bool m_aCurrentKeyStates[KEY_LAST];
    bool m_aFrameKeyStates[KEY_LAST];
    uint32_t m_InputCounter;
    std::vector<CTouchFingerState> m_vTouchFingerStates;
 
    void HandleJoystickAxisMotionEvent(const SDL_JoyAxisEvent &Event);
    void HandleJoystickButtonEvent(const SDL_JoyButtonEvent &Event);
    void HandleJoystickHatMotionEvent(const SDL_JoyHatEvent &Event);
    void HandleJoystickAddedEvent(const SDL_JoyDeviceEvent &Event);
    void HandleJoystickRemovedEvent(const SDL_JoyDeviceEvent &Event);
    vec2 TouchPositionToViewport(vec2 Position) const;
    vec2 TouchDeltaToViewport(vec2 Delta) const;
    void HandleTouchDownEvent(const SDL_TouchFingerEvent &Event);
    void HandleTouchUpEvent(const SDL_TouchFingerEvent &Event);
    void HandleTouchMotionEvent(const SDL_TouchFingerEvent &Event);
    void HandleTextEditingEvent(const char *pText, int Start, int Length);
 
    char m_aDropFile[IO_MAX_PATH_LENGTH];
 
    void ProcessSystemMessage(SDL_SysWMmsg *pMsg);
 
public:
    CInput();
 
    void Init() override;
    int Update() override;
    void Shutdown() override;
 
    void ConsumeEvents(std::function<void(const CEvent &Event)> Consumer) const override;
    void Clear() override;
    float GetUpdateTime() const override;
 
    bool ModifierIsPressed() const override { return KeyIsPressed(KEY_LCTRL) || KeyIsPressed(KEY_RCTRL) || KeyIsPressed(KEY_LGUI) || KeyIsPressed(KEY_RGUI); }
    bool ShiftIsPressed() const override { return KeyIsPressed(KEY_LSHIFT) || KeyIsPressed(KEY_RSHIFT); }
    bool AltIsPressed() const override { return KeyIsPressed(KEY_LALT) || KeyIsPressed(KEY_RALT); }
    bool KeyIsPressed(int Key) const override;
    bool KeyPress(int Key) const override;
    const char *KeyName(int Key) const override;
    int FindKeyByName(const char *pKeyName) const override;
 
    size_t NumJoysticks() const override { return m_vJoysticks.size(); }
    CJoystick *GetJoystick(size_t Index) override { return &m_vJoysticks[Index]; }
    CJoystick *GetActiveJoystick() override { return m_pActiveJoystick; }
    void SetActiveJoystick(size_t Index) override;
 
    bool MouseRelative(float *pX, float *pY) override;
    void MouseModeAbsolute() override;
    void MouseModeRelative() override;
    vec2 NativeMousePos() const override;
    bool NativeMousePressed(int Index) const override;
 
    const std::vector<CTouchFingerState> &TouchFingerStates() const override;
    void ClearTouchDeltas() override;
 
    std::string GetClipboardText() override;
    void SetClipboardText(const char *pText) override;
 
    void StartTextInput() override;
    void StopTextInput() override;
    void EnsureScreenKeyboardShown() override;
    const char *GetComposition() const override { return m_CompositionString.c_str(); }
    bool HasComposition() const override { return !m_CompositionString.empty(); }
    int GetCompositionCursor() const override { return m_CompositionCursor; }
    int GetCompositionLength() const override { return m_CompositionString.length(); }
    const char *GetCandidate(int Index) const override { return m_vCandidates[Index].c_str(); }
    int GetCandidateCount() const override { return m_vCandidates.size(); }
    int GetCandidateSelectedIndex() const override { return m_CandidateSelectedIndex; }
    void SetCompositionWindowPosition(float X, float Y, float H) override;
 
    bool GetDropFile(char *aBuf, int Len) override;
};
 
#endif