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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef FQTERM_DECODE_H
#define FQTERM_DECODE_H
#include <QObject>
#include "fqterm_text_line.h"
namespace FQTerm {
class FQTermDecode;
class FQTermBuffer;
class FQTermTelnet;
// this for FSM
typedef void(FQTermDecode:: *StateFunc)();
struct StateOption {
int byte; // char value to look for; -1==end/default
StateFunc action;
StateOption *nextState;
};
class FQTermDecode: public QObject {
Q_OBJECT;
public:
FQTermDecode(FQTermBuffer *, int server_encoding);
~FQTermDecode();
// translate data from telnet socket to our own buffer
// return how many bytes are processed.
int decode(const char *cstr, int length);
bool bellReceive() {
return isBell_;
}
void setServerEncoding(int encoding) {
server_encoding_ = encoding;
}
//signals:
// void decodeFinished();
signals:
void mouseMode(bool);
void enqReceived();
void onTitleSet(const QString&);
public slots:
void onCaretChangeRow();
private:
// escape sequence actions
// you'd better see FSM structure array in FQTermDecode.cpp
void setAttr();
void setMargins();
void termReset();
// char screen functions
void deleteStr();
void deleteLine();
void insertStr();
void insertLine();
void eraseStr();
void eraseLine();
void eraseScreen();
// cursor functions
void saveCursor();
void restoreCursor();
void cursorPosition();
// Move cursor, stop at boundary.
void cursorLeft();
void cursorDown();
void cursorRight();
void cursorUp();
// Move cursor, scroll at boundary.
void moveCursorUp();
void moveCursorDown();
void nextLine();
void selectG0A();
void selectG0B();
void selectG00();
void selectG01();
void selectG02();
void selectG1A();
void selectG1B();
void selectG10();
void selectG11();
void selectG12();
// other escape sequence actions
void normalInput();
//title settings
void setTitle();
void collectText();
void clearText();
// action parameters
void clearParam();
void paramDigit();
void nextParam();
// non-printing characters
void cr(), lf(), ff(), bell(), tab(), bs(), del(), g0(), g1(), enq();
void addTabStop();
void clearTabStop();
void setMode();
void resetMode();
void setDecPrivateMode();
void resetDecPrivateMode();
void setNumericKeypad();
void setAppKeypad();
void saveMode();
void restoreMode();
// video alignment test - fill screen with E's.
void fillScreen();
void test();
private:
bool isBell_;
// short currentAttr_, defaultAttr_;
unsigned char current_color_, default_color_;
unsigned char current_attr_, default_attr_;
// ********** ansi decoder states ****************
StateOption *current_state_;
struct VT100StateMachine {
static StateOption normal_state_[], esc_state_[], bracket_state_[];
static StateOption private_state_[], sharp_state_[];
static StateOption title_state_[], title_text_state_[];
static StateOption select_g0_charset_state_[], select_g1_charset_state_[];
};
static const char *getStateName(const StateOption *state);
void logParam() const;
bool interrupt_decode_;
// ********** decoder *****************
const char *inputData_;
int inputLength_, dataIndex_;
int paramIndex_, param_[30];
bool isParamAvailable_;
QByteArray textParam_;
bool savedMode_[30];
bool currentMode_[30];
FQTermBuffer *termBuffer_;
int server_encoding_;
QString bbs2unicode(const QByteArray &text);
int processInput(QByteArray& result);
QByteArray leftToDecode_;
};
} // namespace FQTerm
#endif // FQTERM_DECODE_H
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