/* @history_funcs{"go"} */
static JSBool
history_go(JSContext *ctx, unsigned int argc, jsval *rval)
{
struct ecmascript_interpreter *interpreter = JS_GetContextPrivate(ctx);
struct document_view *doc_view = interpreter->vs->doc_view;
struct session *ses = doc_view->session;
jsval *argv = JS_ARGV(ctx, rval);
int index;
struct location *loc;
if (argc != 1)
return JS_TRUE;
index = atol(jsval_to_string(ctx, &argv[0]));
for (loc = cur_loc(ses);
loc != (struct location *) &ses->history.history;
loc = index > 0 ? loc->next : loc->prev) {
if (!index) {
go_history(ses, loc);
break;
}
index += index > 0 ? -1 : 1;
}
JS_SET_RVAL(ctx, rval, JSVAL_NULL);
return 2;
}
std::string cmd_handler::readline(const std::string & prompt)
{
char c;
char arrow[2];
const char del[] = "\b \b";
auto clear_line = [del](int count)
{
for (int i = 0; i < count; i++)
{
if (write(STDOUT_FILENO, &del, 3) < 0)
{
std::cerr << "write: " << strerror(errno) << std::endl;
}
}
};
history_iter_ = history_.end();
std::string line, word;
struct termios tty, tty_change;
tcgetattr(STDIN_FILENO, &tty);
tty_change = tty;
tty_change.c_lflag &= ~ICANON;
tty_change.c_lflag &= ~ECHO;
tcsetattr(STDIN_FILENO, TCSAFLUSH, &tty_change);
if (write(STDOUT_FILENO, prompt.data(), prompt.size()) < 0)
{
std::cerr << "write: " << strerror(errno) << std::endl;
}
auto dir = direction_none;
size_t current_size = 0;
std::string value;
while(true)
{
if (read(STDIN_FILENO, &c, 1) < 0)
{
std::cerr << "read: " << strerror(errno) << std::endl;
}
if (std::iscntrl(c))
{
switch(c)
{
case '\033':
current_size = line.size();
// eat the rest of the input
if (read(STDIN_FILENO, &arrow, 2) < 0)
{
std::cerr << "read: " << strerror(errno) << std::endl;
}
if (arrow[1] == 'A')
{
dir = direction_back;
}
else if (arrow[1] == 'B')
{
dir = direction_forward;
}
if (dir != direction_none && go_history(dir, line))
{
clear_line(current_size);
if (write(STDOUT_FILENO, line.data(), line.size()) < 0)
{
std::cerr << "write: " << strerror(errno) << std::endl;
}
dir = direction_none;
current_size = 0;
}
break;
case '\n':
tcsetattr(STDIN_FILENO, TCSANOW, &tty);
std::cout << std::endl;
if (line.empty() && !history_.empty())
{
value = history_.back();
}
else
{
value = rtrim(ltrim(line));
}
if (log_.is_open())
{
log_ << prompt << value << std::endl;
}
return value;
case '\b':
case 127:
if (!line.empty())
{
line.erase(line.end()-1, line.end());
if (write(STDOUT_FILENO, &del, 3) < 0)
{
std::cerr << "write: " << strerror(errno) << std::endl;
}
}
break;
case '\t':
// TODO : tab complete
break;
}
}
else
{
if (write(STDOUT_FILENO, &c, 1) < 0)
{
std::cerr << "write: " << strerror(errno) << std::endl;
}
if (std::iswspace(c))
{
if (!word.empty())
{
word.clear();
}
}
else
{
word.push_back(c);
}
line.push_back(c);
}
}
}