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Continue C++ rewrite.

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This commit is contained in:
Kyle Isom
2025-11-25 00:04:58 -08:00
parent bbb23916a0
commit 881e2b3393
13 changed files with 1563 additions and 213 deletions
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10
CMakeLists.txt
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@@ -15,6 +15,11 @@ set(KE_SOURCES
main.cc main.cc
abuf.cc abuf.cc
erow.cc erow.cc
terminal.cc
input_handler.cc
display.cc
file_io.cc
killring.cc
) )
# Header files # Header files
@@ -22,6 +27,11 @@ set(KE_HEADERS
ke_constants.h ke_constants.h
abuf.h abuf.h
erow.h erow.h
terminal.h
input_handler.h
display.h
file_io.h
killring.h
) )
# Build options # Build options

19
Makefile
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@@ -18,8 +18,8 @@ CXXFLAGS += -fsanitize=address -fno-omit-frame-pointer
LDFLAGS := -fsanitize=address LDFLAGS := -fsanitize=address
SOURCES := main.cc abuf.cc erow.cc SOURCES := main.cc abuf.cc erow.cc terminal.cc input_handler.cc display.cc file_io.cc killring.cc
OBJECTS := main.o abuf.o erow.o OBJECTS := main.o abuf.o erow.o terminal.o input_handler.o display.o file_io.o killring.o
all: $(TARGET) test.txt all: $(TARGET) test.txt
@@ -35,6 +35,21 @@ abuf.o: abuf.cc abuf.h
erow.o: erow.cc erow.h erow.o: erow.cc erow.h
$(CXX) $(CXXFLAGS) -c erow.cc $(CXX) $(CXXFLAGS) -c erow.cc
terminal.o: terminal.cc terminal.h
$(CXX) $(CXXFLAGS) -c terminal.cc
input_handler.o: input_handler.cc input_handler.h ke_constants.h
$(CXX) $(CXXFLAGS) -c input_handler.cc
display.o: display.cc display.h ke_constants.h
$(CXX) $(CXXFLAGS) -c display.cc
file_io.o: file_io.cc file_io.h
$(CXX) $(CXXFLAGS) -c file_io.cc
killring.o: killring.cc killring.h
$(CXX) $(CXXFLAGS) -c killring.cc
.PHONY: install .PHONY: install
#install: $(TARGET) #install: $(TARGET)
install: install:

237
display.cc Normal file
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@@ -0,0 +1,237 @@
#include "display.h"
#include "ke_constants.h"
#include "abuf.h"
#include "erow.h"
#include <termios.h>
#include <unistd.h>
#include <cstdio>
#include <cstring>
#include <ctime>
#include <cassert>
// Need access to main.cc structures and functions
extern void erow_update(struct erow *row);
extern int erow_render_to_cursor(struct erow *row, int cx);
// erow definition (needed for accessing row fields)
struct erow {
char *line;
char *render;
int size;
int rsize;
int cap;
};
// editor_t definition (needed for display operations)
struct editor_t {
struct termios entry_term;
int rows, cols;
int curx, cury;
int rx;
int mode;
int nrows;
int rowoffs, coloffs;
struct erow *row;
struct erow *killring;
int kill;
int no_kill;
char *filename;
int dirty;
int dirtyex;
char msg[80];
int mark_set;
int mark_curx, mark_cury;
time_t msgtm;
};
namespace ke {
void Display::clear(ke::abuf* ab) {
if (ab == nullptr) {
(void)write(STDOUT_FILENO, ESCSEQ "2J", 4);
(void)write(STDOUT_FILENO, ESCSEQ "H", 3);
} else {
ab->append(ESCSEQ "2J", 4);
ab->append(ESCSEQ "H", 3);
}
}
void Display::draw_rows(editor_t* editor, ke::abuf* ab) {
assert(editor->cols >= 0);
char* buf = new char[editor->cols];
int buflen, filerow, padding;
int y;
for (y = 0; y < editor->rows; y++) {
filerow = y + editor->rowoffs;
if (filerow >= editor->nrows) {
if ((editor->nrows == 0) && (y == editor->rows / 3)) {
buflen = snprintf(buf,
editor->cols,
"%s",
KE_VERSION);
padding = (editor->rows - buflen) / 2;
if (padding) {
ab->append("|", 1);
padding--;
}
while (padding--)
ab->append(" ", 1);
ab->append(buf, buflen);
} else {
ab->append("|", 1);
}
} else {
erow_update(&editor->row[filerow]);
buflen = editor->row[filerow].rsize - editor->coloffs;
if (buflen < 0) {
buflen = 0;
}
if (buflen > editor->cols) {
buflen = editor->cols;
}
ab->append(editor->row[filerow].render + editor->coloffs,
buflen);
}
ab->append(ESCSEQ "K", 3);
ab->append("\r\n", 2);
}
delete[] buf;
}
char Display::status_mode_char(int mode) {
switch (mode) {
case MODE_NORMAL:
return 'N';
case MODE_KCOMMAND:
return 'K';
case MODE_ESCAPE:
return 'E';
default:
return '?';
}
}
void Display::draw_status_bar(editor_t* editor, ke::abuf* ab) {
char* status = new char[editor->cols];
char* rstatus = new char[editor->cols];
char* mstatus = new char[editor->cols];
int len, rlen;
len = snprintf(status,
editor->cols,
"%c%cke: %.20s - %d lines",
status_mode_char(editor->mode),
editor->dirty ? '!' : '-',
editor->filename ? editor->filename : "[no file]",
editor->nrows);
if (editor->mark_set) {
snprintf(mstatus,
editor->cols,
" | M: %d, %d ",
editor->mark_curx + 1,
editor->mark_cury + 1);
} else {
snprintf(mstatus, editor->cols, " | M:clear ");
}
rlen = snprintf(rstatus,
editor->cols,
"L%d/%d C%d %s",
editor->cury + 1,
editor->nrows,
editor->curx + 1,
mstatus);
if (len > editor->cols) {
len = editor->cols;
}
ab->append(ESCSEQ "7m", 4);
ab->append(status, len);
while (len < editor->cols) {
if (editor->cols - len == rlen) {
ab->append(rstatus, rlen);
break;
} else {
ab->append(" ", 1);
len++;
}
len++;
}
ab->append(ESCSEQ "m", 3);
ab->append("\r\n", 2);
delete[] status;
delete[] rstatus;
delete[] mstatus;
}
void Display::draw_message_line(editor_t* editor, ke::abuf* ab) {
int len = strlen(editor->msg);
ab->append(ESCSEQ "K", 3);
if (len > editor->cols) {
len = editor->cols;
}
if (len && ((time(nullptr) - editor->msgtm) < MSG_TIMEO)) {
ab->append(editor->msg, len);
}
}
void Display::scroll(editor_t* editor) {
editor->rx = 0;
if (editor->cury < editor->nrows) {
editor->rx = erow_render_to_cursor(
&editor->row[editor->cury],
editor->curx);
}
if (editor->cury < editor->rowoffs) {
editor->rowoffs = editor->cury;
}
if (editor->cury >= editor->rowoffs + editor->rows) {
editor->rowoffs = editor->cury - editor->rows + 1;
}
if (editor->rx < editor->coloffs) {
editor->coloffs = editor->rx;
}
if (editor->rx >= editor->coloffs + editor->cols) {
editor->coloffs = editor->rx - editor->cols + 1;
}
}
void Display::refresh(editor_t* editor) {
char buf[32];
ke::abuf ab;
scroll(editor);
ab.append(ESCSEQ "?25l", 6);
clear(&ab);
draw_rows(editor, &ab);
draw_status_bar(editor, &ab);
draw_message_line(editor, &ab);
snprintf(buf,
sizeof(buf),
ESCSEQ "%d;%dH",
(editor->cury - editor->rowoffs) + 1,
(editor->rx - editor->coloffs) + 1);
ab.append(buf, strnlen(buf, 32));
ab.append(ESCSEQ "?25h", 6);
(void)write(STDOUT_FILENO, ab.data(), ab.size());
}
} // namespace ke

42
display.h Normal file
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@@ -0,0 +1,42 @@
#ifndef DISPLAY_HPP
#define DISPLAY_HPP
#include <cstddef>
// Forward declarations
struct editor_t;
namespace ke {
class abuf; // Forward declaration of ke::abuf
/**
* Display class for screen rendering and refresh operations.
*/
class Display {
public:
Display() = default;
~Display() = default;
// Deleted copy constructor and assignment
Display(const Display&) = delete;
Display& operator=(const Display&) = delete;
// Main display operations
static void refresh(editor_t* editor);
static void clear(ke::abuf* ab);
// Drawing operations
static void draw_rows(editor_t* editor, ke::abuf* ab);
static void draw_status_bar(editor_t* editor, ke::abuf* ab);
static void draw_message_line(editor_t* editor, ke::abuf* ab);
// Scrolling
static void scroll(editor_t* editor);
private:
static char status_mode_char(int mode);
};
} // namespace ke
#endif // DISPLAY_HPP

180
file_io.cc Normal file
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@@ -0,0 +1,180 @@
#include "file_io.h"
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <ctime>
// Need access to main.cc structures and functions
extern void erow_insert(int at, const char *s, int len);
extern void reset_editor();
extern void editor_set_status(const char *fmt, ...);
extern void die(const char *s);
extern char *editor_prompt(const char *, void (*cb)(char *, int16_t));
// erow definition
struct erow {
char *line;
char *render;
int size;
int rsize;
int cap;
};
// editor_t definition
struct editor_t {
struct termios entry_term;
int rows, cols;
int curx, cury;
int rx;
int mode;
int nrows;
int rowoffs, coloffs;
struct erow *row;
struct erow *killring;
int kill;
int no_kill;
char *filename;
int dirty;
int dirtyex;
char msg[80];
int mark_set;
int mark_curx, mark_cury;
time_t msgtm;
};
namespace ke {
void FileIO::open_file(editor_t* editor, const char* filename) {
char* line = nullptr;
size_t linecap = 0;
ssize_t linelen;
FILE* fp = nullptr;
reset_editor();
editor->filename = strdup(filename);
assert(editor->filename != nullptr);
editor->dirty = 0;
if ((fp = fopen(filename, "r")) == nullptr) {
if (errno == ENOENT) {
editor_set_status("[new file]");
return;
}
die("fopen");
}
while ((linelen = getline(&line, &linecap, fp)) != -1) {
if (linelen != -1) {
while ((linelen > 0) && ((line[linelen - 1] == '\r') ||
(line[linelen - 1] == '\n'))) {
linelen--;
}
erow_insert(editor->nrows, line, linelen);
}
}
free(line);
line = nullptr;
fclose(fp);
}
char* FileIO::rows_to_buffer(editor_t* editor, int* buflen) {
int len = 0;
int j;
char* buf = nullptr;
char* p = nullptr;
for (j = 0; j < editor->nrows; j++) {
/* extra byte for newline */
len += editor->row[j].size + 1;
}
if (len == 0) {
return nullptr;
}
*buflen = len;
buf = static_cast<char*>(malloc(len));
assert(buf != nullptr);
p = buf;
for (j = 0; j < editor->nrows; j++) {
memcpy(p, editor->row[j].line, editor->row[j].size);
p += editor->row[j].size;
*p++ = '\n';
}
return buf;
}
int FileIO::save_file(editor_t* editor) {
int fd = -1;
int len;
int status = 1; /* will be used as exit code */
char* buf;
if (!editor->dirty) {
editor_set_status("No changes to save.");
return 0;
}
if (editor->filename == nullptr) {
editor->filename = editor_prompt("Filename: %s", nullptr);
if (editor->filename == nullptr) {
editor_set_status("Save aborted.");
return 0;
}
}
buf = rows_to_buffer(editor, &len);
if ((fd = open(editor->filename, O_RDWR | O_CREAT, 0644)) == -1) {
goto save_exit;
}
if (-1 == ftruncate(fd, len)) {
goto save_exit;
}
if (len == 0) {
status = 0;
goto save_exit;
}
if ((ssize_t) len != write(fd, buf, len)) {
goto save_exit;
}
status = 0;
save_exit:
if (fd)
close(fd);
if (buf) {
free(buf);
buf = nullptr;
}
if (status != 0) {
buf = strerror(errno);
editor_set_status("Error writing %s: %s",
editor->filename,
buf);
} else {
editor_set_status("Wrote %d bytes to %s.",
len,
editor->filename);
editor->dirty = 0;
}
return status;
}
} // namespace ke

29
file_io.h Normal file
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@@ -0,0 +1,29 @@
#ifndef FILE_IO_HPP
#define FILE_IO_HPP
// Forward declaration
struct editor_t;
namespace ke {
/**
* File I/O class for reading and writing files.
*/
class FileIO {
public:
FileIO() = default;
~FileIO() = default;
// Deleted copy constructor and assignment
FileIO(const FileIO&) = delete;
FileIO& operator=(const FileIO&) = delete;
// File operations
static void open_file(editor_t* editor, const char* filename);
static int save_file(editor_t* editor);
static char* rows_to_buffer(editor_t* editor, int* buflen);
};
} // namespace ke
#endif // FILE_IO_HPP

122
input_handler.cc Normal file
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@@ -0,0 +1,122 @@
#include "input_handler.h"
#include "ke_constants.h"
#include <unistd.h>
#include <cstdio>
#include <cstdlib>
namespace ke {
// Key codes for special keys
enum KeyPress {
TAB_KEY = 9,
ESC_KEY = 27,
BACKSPACE = 127,
ARROW_LEFT = 1000,
ARROW_RIGHT,
ARROW_UP,
ARROW_DOWN,
DEL_KEY,
HOME_KEY,
END_KEY,
PG_UP,
PG_DN,
};
int16_t InputHandler::get_keypress() {
char seq[3];
/* read raw byte so UTF-8 bytes (>=0x80) are not sign-extended */
unsigned char uc = 0;
int16_t c;
if (read(STDIN_FILENO, &uc, 1) == -1) {
perror("get_keypress:read");
exit(1);
}
c = (int16_t) uc;
if (c == 0x1b) {
if (read(STDIN_FILENO, &seq[0], 1) != 1)
return c;
if (read(STDIN_FILENO, &seq[1], 1) != 1)
return c;
if (seq[0] == '[') {
if (seq[1] < 'A') {
if (read(STDIN_FILENO, &seq[2], 1) != 1)
return c;
if (seq[2] == '~') {
switch (seq[1]) {
case '1':
return HOME_KEY;
case '3':
return DEL_KEY;
case '4':
return END_KEY;
case '5':
return PG_UP;
case '6':
return PG_DN;
case '7':
return HOME_KEY;
case '8':
return END_KEY;
}
}
} else {
switch (seq[1]) {
case 'A':
return ARROW_UP;
case 'B':
return ARROW_DOWN;
case 'C':
return ARROW_RIGHT;
case 'D':
return ARROW_LEFT;
case 'F':
return END_KEY;
case 'H':
return HOME_KEY;
default:
/* nada */ ;
}
}
} else if (seq[0] == 'O') {
switch (seq[1]) {
case 'F':
return END_KEY;
case 'H':
return HOME_KEY;
}
}
return 0x1b;
}
return c;
}
bool InputHandler::is_arrow_key(int16_t c) {
switch (c) {
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
case ARROW_UP:
case CTRL_KEY('p'):
case CTRL_KEY('n'):
case CTRL_KEY('f'):
case CTRL_KEY('b'):
case CTRL_KEY('a'):
case CTRL_KEY('e'):
case END_KEY:
case HOME_KEY:
case PG_DN:
case PG_UP:
return true;
}
return false;
}
} // namespace ke

29
input_handler.h Normal file
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@@ -0,0 +1,29 @@
#ifndef INPUT_HANDLER_HPP
#define INPUT_HANDLER_HPP
#include <cstdint>
namespace ke {
/**
* Input handler class for reading and processing keyboard input.
*/
class InputHandler {
public:
InputHandler() = default;
~InputHandler() = default;
// Deleted copy constructor and assignment
InputHandler(const InputHandler&) = delete;
InputHandler& operator=(const InputHandler&) = delete;
// Read a keypress from stdin
static int16_t get_keypress();
// Check if a key code is an arrow/navigation key
static bool is_arrow_key(int16_t c);
};
} // namespace ke
#endif // INPUT_HANDLER_HPP

262
killring.cc Normal file
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@@ -0,0 +1,262 @@
#include "killring.h"
#include <termios.h>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <ctime>
// Need access to main.cc structures and functions
extern int erow_init(struct erow *row, int len);
extern void erow_update(struct erow *row);
extern void erow_free(struct erow *row);
extern void editor_set_status(const char *fmt, ...);
extern void insertch(int16_t c);
extern void newline();
extern void move_cursor(int16_t c);
extern int cursor_at_eol();
extern void swap_int(int *a, int *b);
extern void deletech(uint8_t op);
// erow definition
struct erow {
char *line;
char *render;
int size;
int rsize;
int cap;
};
// editor_t definition
struct editor_t {
struct termios entry_term;
int rows, cols;
int curx, cury;
int rx;
int mode;
int nrows;
int rowoffs, coloffs;
struct erow *row;
struct erow *killring;
int kill;
int no_kill;
char *filename;
int dirty;
int dirtyex;
char msg[80];
int mark_set;
int mark_curx, mark_cury;
time_t msgtm;
};
namespace ke {
void Killring::flush(editor_t* editor) {
if (editor->killring != nullptr) {
erow_free(editor->killring);
free(editor->killring);
editor->killring = nullptr;
}
}
void Killring::yank(editor_t* editor) {
if (editor->killring == nullptr) {
return;
}
/*
* Insert killring contents at the cursor without clearing the ring.
* Interpret '\n' as an actual newline() rather than inserting a raw 0x0A
* byte, so yanked content preserves lines correctly.
*/
for (int i = 0; i < editor->killring->size; i++) {
unsigned char ch = (unsigned char) editor->killring->line[i];
if (ch == '\n') {
newline();
} else {
insertch(ch);
}
}
}
void Killring::start_with_char(editor_t* editor, unsigned char ch) {
erow* row = nullptr;
if (editor->killring != nullptr) {
erow_free(editor->killring);
free(editor->killring);
editor->killring = nullptr;
}
editor->killring = static_cast<erow*>(malloc(sizeof(erow)));
assert(editor->killring != nullptr);
assert(erow_init(editor->killring, 0) == 0);
/* append one char to empty killring without affecting editor.dirty */
row = editor->killring;
row->line = static_cast<char*>(realloc(row->line, row->size + 2));
assert(row->line != nullptr);
row->line[row->size] = ch;
row->size++;
row->line[row->size] = '\0';
erow_update(row);
}
void Killring::append_char(editor_t* editor, unsigned char ch) {
erow* row = nullptr;
if (editor->killring == nullptr) {
start_with_char(editor, ch);
return;
}
row = editor->killring;
row->line = static_cast<char*>(realloc(row->line, row->size + 2));
assert(row->line != nullptr);
row->line[row->size] = ch;
row->size++;
row->line[row->size] = '\0';
erow_update(row);
}
void Killring::prepend_char(editor_t* editor, unsigned char ch) {
if (editor->killring == nullptr) {
start_with_char(editor, ch);
return;
}
erow* row = editor->killring;
row->line = static_cast<char*>(realloc(row->line, row->size + 2));
assert(row->line != nullptr);
memmove(&row->line[1], &row->line[0], row->size + 1);
row->line[0] = ch;
row->size++;
erow_update(row);
}
void Killring::toggle_markset(editor_t* editor) {
if (editor->mark_set) {
editor->mark_set = 0;
editor_set_status("Mark cleared.");
return;
}
editor->mark_set = 1;
editor->mark_curx = editor->curx;
editor->mark_cury = editor->cury;
editor_set_status("Mark set.");
}
int Killring::cursor_after_mark(editor_t* editor) {
if (editor->mark_cury < editor->cury) {
return 1;
}
if (editor->mark_cury > editor->cury) {
return 0;
}
return editor->curx >= editor->mark_curx;
}
int Killring::count_chars_from_cursor_to_mark(editor_t* editor) {
int count = 0;
int curx = editor->curx;
int cury = editor->cury;
int markx = editor->mark_curx;
int marky = editor->mark_cury;
if (!cursor_after_mark(editor)) {
swap_int(&curx, &markx);
swap_int(&cury, &marky);
}
editor->curx = markx;
editor->cury = marky;
while (editor->cury != cury) {
while (!cursor_at_eol()) {
move_cursor(1000 + 3); // ARROW_RIGHT
count++;
}
move_cursor(1000 + 3); // ARROW_RIGHT
count++;
}
while (editor->curx != curx) {
count++;
move_cursor(1000 + 3); // ARROW_RIGHT
}
return count;
}
void Killring::kill_region(editor_t* editor) {
int curx = editor->curx;
int cury = editor->cury;
int markx = editor->mark_curx;
int marky = editor->mark_cury;
if (!editor->mark_set) {
return;
}
/* kill the current killring */
flush(editor);
if (!cursor_after_mark(editor)) {
swap_int(&curx, &markx);
swap_int(&cury, &marky);
}
editor->curx = markx;
editor->cury = marky;
while (editor->cury != cury) {
while (!cursor_at_eol()) {
append_char(editor, editor->row[editor->cury].line[editor->curx]);
move_cursor(1000 + 3); // ARROW_RIGHT
}
append_char(editor, '\n');
move_cursor(1000 + 3); // ARROW_RIGHT
}
while (editor->curx != curx) {
append_char(editor, editor->row[editor->cury].line[editor->curx]);
move_cursor(1000 + 3); // ARROW_RIGHT
}
editor_set_status("Region killed.");
}
void Killring::delete_region(editor_t* editor) {
int count = count_chars_from_cursor_to_mark(editor);
int killed = 0;
int curx = editor->curx;
int cury = editor->cury;
int markx = editor->mark_curx;
int marky = editor->mark_cury;
if (!editor->mark_set) {
return;
}
if (!cursor_after_mark(editor)) {
swap_int(&curx, &markx);
swap_int(&cury, &marky);
}
editor->curx = markx;
editor->cury = marky;
while (killed < count) {
deletech(0); // KILLRING_NO_OP
killed++;
}
editor->kill = 1;
editor_set_status("Region killed.");
}
} // namespace ke

44
killring.h Normal file
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@@ -0,0 +1,44 @@
#ifndef KILLRING_HPP
#define KILLRING_HPP
#include <cstdint>
// Forward declarations
struct editor_t;
namespace ke {
/**
* Killring class for cut/paste (kill/yank) operations.
*/
class Killring {
public:
Killring() = default;
~Killring() = default;
// Deleted copy constructor and assignment
Killring(const Killring&) = delete;
Killring& operator=(const Killring&) = delete;
// Killring operations
static void flush(editor_t* editor);
static void yank(editor_t* editor);
static void start_with_char(editor_t* editor, unsigned char ch);
static void append_char(editor_t* editor, unsigned char ch);
static void prepend_char(editor_t* editor, unsigned char ch);
// Mark operations
static void toggle_markset(editor_t* editor);
static int cursor_after_mark(editor_t* editor);
// Region operations
static void kill_region(editor_t* editor);
static void delete_region(editor_t* editor);
private:
static int count_chars_from_cursor_to_mark(editor_t* editor);
};
} // namespace ke
#endif // KILLRING_HPP

652
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terminal.cc Normal file
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#include "terminal.h"
#include <sys/ioctl.h>
#include <unistd.h>
#include <cstdio>
#include <cstdlib>
namespace ke {
static Terminal* g_terminal_instance = nullptr;
static void cleanup_terminal_on_exit() {
if (g_terminal_instance) {
g_terminal_instance->disable_raw_mode();
}
}
Terminal::Terminal() : raw_mode_enabled_(false) {
g_terminal_instance = this;
}
Terminal::~Terminal() {
if (raw_mode_enabled_) {
disable_raw_mode();
}
g_terminal_instance = nullptr;
}
void Terminal::setup() {
if (tcgetattr(STDIN_FILENO, &entry_term_) == -1) {
perror("can't snapshot terminal settings");
exit(1);
}
atexit(cleanup_terminal_on_exit);
enable_raw_mode();
}
void Terminal::enable_raw_mode() {
if (raw_mode_enabled_) {
return;
}
struct termios raw;
/* Read the current terminal parameters for standard input. */
if (tcgetattr(STDIN_FILENO, &raw) == -1) {
perror("tcgetattr while enabling raw mode");
exit(1);
}
/*
* Put the terminal into raw mode.
*/
cfmakeraw(&raw);
/*
* Set timeout for read(2).
*
* VMIN: what is the minimum number of bytes required for read
* to return?
*
* VTIME: max time before read(2) returns in hundreds of milli-
* seconds.
*/
raw.c_cc[VMIN] = 0;
raw.c_cc[VTIME] = 1;
/*
* Now write the terminal parameters to the current terminal,
* after flushing any waiting input out.
*/
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
perror("tcsetattr while enabling raw mode");
exit(1);
}
raw_mode_enabled_ = true;
}
void Terminal::disable_raw_mode() {
if (!raw_mode_enabled_) {
return;
}
clear_screen();
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &entry_term_) == -1) {
perror("couldn't disable terminal raw mode");
exit(1);
}
raw_mode_enabled_ = false;
}
int Terminal::get_window_size(int* rows, int* cols) {
struct winsize ws;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
return -1;
}
*cols = ws.ws_col;
*rows = ws.ws_row;
return 0;
}
void Terminal::clear_screen() {
(void)write(STDOUT_FILENO, "\x1b[2J", 4);
(void)write(STDOUT_FILENO, "\x1b[H", 3);
}
} // namespace ke

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#ifndef TERMINAL_HPP
#define TERMINAL_HPP
#include <termios.h>
namespace ke {
/**
* Terminal management class for handling raw mode and terminal operations.
*/
class Terminal {
public:
Terminal();
~Terminal();
// Deleted copy constructor and assignment
Terminal(const Terminal&) = delete;
Terminal& operator=(const Terminal&) = delete;
// Setup and teardown
void setup();
void enable_raw_mode();
void disable_raw_mode();
// Terminal operations
static int get_window_size(int* rows, int* cols);
static void clear_screen();
// Access to original terminal settings
const termios& entry_term() const { return entry_term_; }
private:
termios entry_term_;
bool raw_mode_enabled_;
};
} // namespace ke
#endif // TERMINAL_HPP