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handle backspace & ^u

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This commit is contained in:
folkert van heusden 2022-06-09 19:20:32 +02:00
parent 94181e94bd
commit 11fc6c5d86
2 changed files with 16 additions and 4 deletions
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19
console.cpp
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@ -88,6 +88,13 @@ void console::flush_input()
input_buffer.clear(); input_buffer.clear();
} }
void console::emit_backspace()
{
put_char(8);
put_char(' ');
put_char(8);
}
std::string console::read_line(const std::string & prompt) std::string console::read_line(const std::string & prompt)
{ {
put_string(prompt); put_string(prompt);
@ -107,15 +114,19 @@ std::string console::read_line(const std::string & prompt)
if (c == 13 || c == 10) if (c == 13 || c == 10)
break; break;
if (c == 8) { if (c == 8 || c == 127) { // backspace
if (!str.empty()) { if (!str.empty()) {
str = str.substr(0, str.size() - 1); str = str.substr(0, str.size() - 1);
put_char(8); emit_backspace();
put_char(' ');
put_char(8);
} }
} }
else if (c == 21) { // ^u
for(size_t i=0; i<str.size(); i++)
emit_backspace();
str.clear();
}
else if (c >= 32 && c < 127) { else if (c >= 32 && c < 127) {
str += c; str += c;

1
console.h
View file

@ -51,6 +51,7 @@ public:
std::string read_line(const std::string & prompt); std::string read_line(const std::string & prompt);
void flush_input(); void flush_input();
void emit_backspace();
void put_char(const char c); void put_char(const char c);
void put_string(const std::string & what); void put_string(const std::string & what);
virtual void put_string_lf(const std::string & what) = 0; virtual void put_string_lf(const std::string & what) = 0;