inputparser.h

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#pragma once
 
#include <promeki/namespace.h>
#include <promeki/list.h>
#include <promeki/keyevent.h>
#include <promeki/mouseevent.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class TuiInputParser {
        public:
                struct ParsedEvent {
                                enum Type {
                                        None,
                                        Key,
                                        Mouse,
                                        Paste,   
                                        FocusIn, 
                                        FocusOut 
                                };
                                Type          type = None;
                                KeyEvent::Key key = KeyEvent::Key_Unknown;
                                uint8_t       modifiers = 0;
                                String        text;
                                // Mouse fields
                                Point2Di32         mousePos;
                                MouseEvent::Button mouseButton = MouseEvent::NoButton;
                                MouseEvent::Action mouseAction = MouseEvent::Press;
                                uint8_t            mouseButtons = 0; 
                };
 
                TuiInputParser();
 
                List<ParsedEvent> feed(const char *data, int len);
 
        private:
                enum State {
                        Normal,
                        EscapeStart,
                        CSI,
                        SS3,
                        CSIParam,
                        MouseSGR,
                        Paste 
                };
 
                // Upper bound on a single bracketed-paste payload.  Guards
                // against an unterminated paste (missing ESC [ 201 ~) growing
                // the buffer without bound or wedging the parser in Paste state.
                static constexpr size_t kMaxPasteBytes = 8 * 1024 * 1024;
 
                State   _state = Normal;
                String  _buf;
                String  _pasteBuf;           
                uint8_t _buttonState = 0;    
 
                void                 parseCSI(const String &seq, List<ParsedEvent> &events);
                void                 parseSS3(char ch, List<ParsedEvent> &events);
                void                 parseMouseSGR(const String &seq, List<ParsedEvent> &events);
                static KeyEvent::Key csiToKey(int code, int modifier);
};
 
PROMEKI_NAMESPACE_END