CommandOutput.h

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// CommandOutput.h

// Declares various classes that process command output





class cCommandOutputCallback
{
public:
    virtual ~cCommandOutputCallback() {}  // Force a virtual destructor in subclasses

    void Out(const char * a_Fmt, fmt::ArgList);
    FMT_VARIADIC(void, Out, const char *)

    
    virtual void Out(const AString & a_Text) = 0;

    virtual void Finished(void) {}
} ;





class cNullCommandOutputCallback :
    public cCommandOutputCallback
{
    // cCommandOutputCallback overrides:
    virtual void Out(const AString & a_Text) override
    {
        // Do nothing
        UNUSED(a_Text);
    }
} ;





class cStringAccumCommandOutputCallback:
    public cCommandOutputCallback
{
    typedef cCommandOutputCallback super;

public:
    // cCommandOutputCallback overrides:
    virtual void Out(const AString & a_Text) override;
    virtual void Finished(void) override {}

    const AString & GetAccum(void) const { return m_Accum; }

protected:
    AString m_Accum;
} ;





class cLogCommandOutputCallback :
    public cStringAccumCommandOutputCallback
{
public:
    // cStringAccumCommandOutputCallback overrides:
    virtual void Finished(void) override;
} ;





class cLogCommandDeleteSelfOutputCallback :
    public cLogCommandOutputCallback
{
    typedef cLogCommandOutputCallback super;

    virtual void Finished(void) override
    {
        super::Finished();
        delete this;
    }
} ;