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#include "TerminalWidget.h"
#include "Font.h"
#include "Painter.h"
#include <unistd.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
extern int g_fd;
TerminalWidget* g_tw;
TerminalWidget::TerminalWidget(Widget* parent)
: Widget(parent)
{
g_tw = this;
setWindowRelativeRect({ 0, 0, (columns() * font().glyphWidth()) + 4, (rows() * font().glyphHeight()) + 4 });
printf("rekt: %d x %d\n", width(), height());
m_screen = new CharacterWithAttributes[rows() * columns()];
for (unsigned row = 0; row < m_rows; ++row) {
for (unsigned column = 0; column < m_columns; ++column) {
at(row, column).character = ' ';
at(row, column).attribute = 0x07;
}
}
g_fd = getpt();
grantpt(g_fd);
unlockpt(g_fd);
char buf[1024];
ptsname_r(g_fd, buf, sizeof(buf));
if (fork() == 0) {
close(g_fd);
setsid();
int fd = open(buf, O_RDWR);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
signal(SIGWINCH, SIG_IGN);
ioctl(fd, TIOCSCTTY);
execl("/bin/bash", "bash", nullptr);
ASSERT_NOT_REACHED();
}
signal(SIGCHLD, SIG_IGN);
}
TerminalWidget::~TerminalWidget()
{
}
CharacterWithAttributes& TerminalWidget::at(unsigned row, unsigned column)
{
ASSERT(m_screen);
ASSERT(row < m_rows);
ASSERT(column < m_columns);
return m_screen[row * columns() + column];
}
void TerminalWidget::paintEvent(PaintEvent&)
{
Painter painter(*this);
painter.fillRect(rect(), Color::Black);
char buf[2] = { 0, 0 };
for (unsigned row = 0; row < m_rows; ++row) {
int y = row * font().glyphHeight();
for (unsigned column = 0; column < m_columns; ++column) {
int x = column * font().glyphWidth();
buf[0] = at(row, column).character;
painter.drawText({ x + 2, y + 2, width(), font().glyphHeight() }, buf, Painter::TextAlignment::TopLeft, Color(0xa0, 0xa0, 0xa0));
}
}
if (m_belling)
painter.drawRect(rect(), Color::Red);
}
void TerminalWidget::onReceive(const ByteBuffer& buffer)
{
for (unsigned i = 0; i < buffer.size(); ++i) {
onReceive(buffer[i]);
}
}
void TerminalWidget::onReceive(byte ch)
{
//printf("receive %02x\n", ch);
auto scrollScreen = [&] () {
memmove(m_screen, m_screen + columns(), (m_rows - 1) * columns() * sizeof(CharacterWithAttributes));
memset(m_screen + (m_rows - 1) * columns(), ' ', columns() * sizeof(CharacterWithAttributes));
};
auto addChar = [&] (byte ch) {
at(m_cursorRow, m_cursorColumn).character = ch;
if (++m_cursorColumn >= m_columns) {
m_cursorColumn = 0;
if (m_cursorRow < (m_rows - 1)) {
++m_cursorRow;
} else {
scrollScreen();
}
}
};
switch (ch) {
case '\n':
if (m_cursorRow < (m_rows - 1)) {
++m_cursorRow;
} else {
scrollScreen();
}
break;
case '\r':
m_cursorColumn = 0;
break;
case '\t':
// FIXME: Respect terminal tab stops.
while ((m_cursorColumn % 8) != 0 && m_cursorColumn < m_columns) {
addChar(' ');
break;
case '\a':
bell();
break;
case 8:
if (m_cursorColumn > 0) {
--m_cursorColumn;
at(m_cursorRow, m_cursorColumn).character = ' ';
}
break;
case 27:
printf("TerminalWidget: got escape!\n");
break;
default:
addChar(ch);
break;
}
}
update();
}
void TerminalWidget::keyDownEvent(KeyEvent& event)
{
if (event.text().isEmpty())
return;
write(g_fd, event.text().characters(), event.text().length());
}
void TerminalWidget::keyUpEvent(KeyEvent& event)
{
return Widget::keyUpEvent(event);
}
void TerminalWidget::bell()
{
if (m_belling)
stopTimer();
startTimer(250);
m_belling = true;
update();
}
void TerminalWidget::timerEvent(TimerEvent&)
{
m_belling = false;
stopTimer();
update();
}
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