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read Esc without delay on non-windows #47

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Merged
csboo merged 1 commit into from
Mar 10, 2025
Merged

read Esc without delay on non-windows #47

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14 changes: 13 additions & 1 deletion input.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,14 @@ struct Input {
friend std::ostream& operator<<(std::ostream& os, const Input& inp);

private:
// Function to set stdin non-blocking on Unix-like systems
#ifndef _WIN32
static void set_non_blocking(bool enable) {
int flags = fcntl(STDIN_FILENO, F_GETFL, 0);
fcntl(STDIN_FILENO, F_SETFL, enable ? flags | O_NONBLOCK : flags & ~O_NONBLOCK);
}
#endif

using reader_fn = char (*)();
static Input read_helper(reader_fn get_char) {
char byte = get_char();
Expand Down Expand Up @@ -185,6 +193,7 @@ struct Input {
break;
case SpecKey::Esc: {
#ifndef _WIN32
set_non_blocking(true);
char next_byte = get_char();

if (next_byte == 79 || next_byte == 91) {
Expand Down Expand Up @@ -216,8 +225,11 @@ struct Input {
// ignore_byte = get_char();
break;
}
break;
} else {
input = Input(SpecKey::Esc);
}
set_non_blocking(false);
break;
#endif
input = Input(SpecKey::Esc);
}
Expand Down