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_INPUT_H
#define ENGINE_INPUT_H
 
#include "kernel.h"
 
#include <base/types.h>
#include <base/vmath.h>
 
#include <chrono>
#include <cstdint>
#include <functional>
#include <string>
#include <vector>
 
class IInput : public IInterface
{
    MACRO_INTERFACE("input")
public:
    class CEvent
    {
    public:
        int m_Flags;
        int m_Key;
        uint32_t m_InputCount;
        char m_aText[32]; // SDL_TEXTINPUTEVENT_TEXT_SIZE
    };
 
    enum
    {
        FLAG_PRESS = 1 << 0,
        FLAG_RELEASE = 1 << 1,
        FLAG_TEXT = 1 << 2,
        FLAG_REPEAT = 1 << 3,
    };
    enum ECursorType
    {
        CURSOR_NONE,
        CURSOR_MOUSE,
        CURSOR_JOYSTICK,
    };
 
    // events
    virtual void ConsumeEvents(std::function<void(const CEvent &Event)> Consumer) const = 0;
    virtual void Clear() = 0;

    virtual float GetUpdateTime() const = 0;
 
    // keys
    virtual bool ModifierIsPressed() const = 0;
    virtual bool ShiftIsPressed() const = 0;
    virtual bool AltIsPressed() const = 0;
    virtual bool KeyIsPressed(int Key) const = 0;
    virtual bool KeyPress(int Key) const = 0;
    virtual int FindKeyByName(const char *pKeyName) const = 0;
 
    // joystick
    class IJoystick
    {
    public:
        virtual ~IJoystick() = default;
        virtual int GetIndex() const = 0;
        virtual const char *GetName() const = 0;
        virtual int GetNumAxes() const = 0;
        virtual int GetNumButtons() const = 0;
        virtual int GetNumBalls() const = 0;
        virtual int GetNumHats() const = 0;
        virtual float GetAxisValue(int Axis) = 0;
        virtual void GetHatValue(int Hat, int (&aHatKeys)[2]) = 0;
        virtual bool Relative(float *pX, float *pY) = 0;
        virtual bool Absolute(float *pX, float *pY) = 0;
    };
    virtual size_t NumJoysticks() const = 0;
    virtual IJoystick *GetJoystick(size_t Index) = 0;
    virtual IJoystick *GetActiveJoystick() = 0;
    virtual void SetActiveJoystick(size_t Index) = 0;
 
    // mouse
    virtual vec2 NativeMousePos() const = 0;
    virtual bool NativeMousePressed(int Index) const = 0;
    virtual void MouseModeRelative() = 0;
    virtual void MouseModeAbsolute() = 0;
    virtual bool MouseRelative(float *pX, float *pY) = 0;
 
    // touch
    class CTouchFinger
    {
        friend class CInput;
 
        int64_t m_DeviceId;
        int64_t m_FingerId;
 
    public:
        bool operator==(const CTouchFinger &Other) const { return m_DeviceId == Other.m_DeviceId && m_FingerId == Other.m_FingerId; }
        bool operator!=(const CTouchFinger &Other) const { return !(*this == Other); }
    };

    class CTouchFingerState
    {
    public:
        CTouchFinger m_Finger;
        vec2 m_Position;
        vec2 m_Delta;
        std::chrono::nanoseconds m_PressTime;
    };

    virtual const std::vector<CTouchFingerState> &TouchFingerStates() const = 0;
    virtual void ClearTouchDeltas() = 0;
 
    // clipboard
    virtual std::string GetClipboardText() = 0;
    virtual void SetClipboardText(const char *pText) = 0;
 
    // text editing
    virtual void StartTextInput() = 0;
    virtual void StopTextInput() = 0;
    virtual void EnsureScreenKeyboardShown() = 0;
    virtual const char *GetComposition() const = 0;
    virtual bool HasComposition() const = 0;
    virtual int GetCompositionCursor() const = 0;
    virtual int GetCompositionLength() const = 0;
    virtual const char *GetCandidate(int Index) const = 0;
    virtual int GetCandidateCount() const = 0;
    virtual int GetCandidateSelectedIndex() const = 0;
    virtual void SetCompositionWindowPosition(float X, float Y, float H) = 0;
 
    virtual bool GetDropFile(char *aBuf, int Len) = 0;
 
    ECursorType CursorRelative(float *pX, float *pY)
    {
        if(MouseRelative(pX, pY))
            return CURSOR_MOUSE;
        IJoystick *pJoystick = GetActiveJoystick();
        if(pJoystick && pJoystick->Relative(pX, pY))
            return CURSOR_JOYSTICK;
        return CURSOR_NONE;
    }
};
 
class IEngineInput : public IInput
{
    MACRO_INTERFACE("engineinput")
public:
    virtual void Init() = 0;
    void Shutdown() override = 0;
    virtual int Update() = 0;
};
 
extern IEngineInput *CreateEngineInput();
 
#endif