AnsiStripper.h

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#pragma once
 
#if EDITOR
 
#include "ITerminalOutputParser.h"
 
#include <string>
 
class AnsiStripper : public ITerminalOutputParser
{
public:
    std::string Process(const char* data, size_t len) override;
 
    void Reset() override { mState = State::Normal; mEndsWithNewline = true; }
 
    const char* GetName() const override { return "default"; }
 
    void SetSynthesizeFrameNewlines(bool enable) { mSynthesizeFrameNewlines = enable; }
    bool GetSynthesizeFrameNewlines() const      { return mSynthesizeFrameNewlines; }
 
private:
    enum class State
    {
        Normal,       // regular text
        JustSawCr,    // last byte was CR; deciding CRLF vs bare CR
        Esc,          // last byte was ESC; deciding what kind of sequence follows
        Csi,          // inside ESC [ ... <final>
        Osc,          // inside ESC ] ... ( BEL | ESC \ )
        OscEscaped,   // inside OSC, just saw ESC; waiting for backslash
    };
 
    State mState = State::Normal;
 
    // Buffer for accumulating CSI parameter bytes so we can interpret a few
    // common cursor movements (specifically "cursor forward N" -> emit N
    // spaces) which TUI apps use for layout instead of literal spaces.
    std::string mCsiParams;
 
    // Tracks whether the last byte we emitted (across all Process() calls)
    // was a newline. Used to suppress synthetic frame-redraw newlines that
    // would otherwise stack up on TTY backends (notably Linux PTY) where
    // TUI apps like `claude` emit a clear-screen + cursor-home at the start
    // of every chunk, producing a blank line per redraw cycle.
    bool mEndsWithNewline = true;
 
    // See SetSynthesizeFrameNewlines.
    bool mSynthesizeFrameNewlines = true;
};
 
#endif