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#import "Windows";
kernel32 :: #system_library "kernel32";
// https://learn.microsoft.com/en-us/windows/console/getconsolescreenbufferinfo
GetConsoleScreenBufferInfo :: (hConsoleOutput: HANDLE, lpConsoleScreenBufferInfo: *CONSOLE_SCREEN_BUFFER_INFO) -> bool #foreign kernel32;
// https://learn.microsoft.com/en-us/windows/console/readconsole
ReadConsoleA :: (hConsoleInput: HANDLE, lpBuffer: *u8, nNumberOfCharsToRead: s32, lpNumberOfCharsRead: *s32, pInputControl := *void) -> bool #foreign kernel32;
// https://learn.microsoft.com/en-us/windows/console/getconsolemode
GetConsoleMode :: (hConsoleHandle: HANDLE, lpMode: *u32) -> bool #foreign kernel32;
// https://learn.microsoft.com/en-us/windows/console/setconsolemode
SetConsoleMode :: (hConsoleHandle: HANDLE, dwMode: u32) -> bool #foreign kernel32;
// https://learn.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
GetLastError :: () -> s32 #foreign kernel32;
ENABLE_VIRTUAL_TERMINAL_INPUT :: 0x0200;
ENABLE_PROCESSED_OUTPUT :: 0x0001;
ENABLE_WRAP_AT_EOL_OUTPUT :: 0x0002;
ENABLE_VIRTUAL_TERMINAL_PROCESSING :: 0x0004;
DISABLE_NEWLINE_AUTO_RETURN :: 0x0008;
ENABLE_LVB_GRID_WORLDWIDE :: 0x0010;
// https://learn.microsoft.com/en-us/windows/console/setconsolemode
Console_Mode :: enum_flags u32 {
_UNUSED_0001_;
ENABLE_LINE_INPUT; // If enable, ReadFile or ReadConsole function return on CR; otherwise they return when one or more characters are available.
ENABLE_ECHO_INPUT; // Echoes input on screen. Only available if ENABLE_LINE_INPUT is set.
_UNUSED_0008_;
ENABLE_MOUSE_INPUT; //
ENABLE_INSERT_MODE; // If enabled, text entered will be inserted at the current cursor location and all text following that location will not be overwritten. When disabled, all following text will be overwritten.
_UNSED_0040_;
_UNSED_0080_;
_UNSED_0100_;
ENABLE_VIRTUAL_TERMINAL_INPUT; //
_UNSED_0400_;
_UNSED_0800_;
_UNSED_1000_;
_UNSED_2000_;
_UNSED_4000_;
_UNSED_8000_;
}
// https://learn.microsoft.com/en-us/windows/win32/winprog/windows-data-types
SHORT :: s16;
WORD :: u16;
DWORD :: s32;
COORD :: struct {
X : SHORT;
Y : SHORT;
}
SMALL_RECT :: struct {
Left : SHORT;
Top : SHORT;
Right : SHORT;
Bottom : SHORT;
}
CONSOLE_SCREEN_BUFFER_INFO :: struct {
dwSize : COORD;
dwCursorPosition : COORD;
wAttributes : WORD;
srWindow : SMALL_RECT;
dwMaximumWindowSize : COORD;
}
stdin: HANDLE;
initial_stdin_mode: u32;
default_stdin_mode: Console_Mode;
blocking_stdin_mode: Console_Mode;
unblocking_stdin_mode: Console_Mode;
stdout: HANDLE;
initial_stdout_mode: u32;
default_stdout_mode: Console_Mode;
OS_prepare_terminal :: () {
print("TODO TUI\n", to_standard_error = true);
// stdin
stdin = GetStdHandle(STD_INPUT_HANDLE );
if stdin == INVALID_HANDLE_VALUE {
print("Invalid input handler.", to_standard_error = true);
return;
}
if GetConsoleMode(stdin, *initial_stdin_mode) == false {
print("Failed to get input mode.", to_standard_error = true);
return;
}
default_stdin_mode = (cast(Console_Mode) initial_stdin_mode) | .ENABLE_VIRTUAL_TERMINAL_INPUT;
blocking_stdin_mode = default_stdin_mode | .ENABLE_LINE_INPUT | .ENABLE_ECHO_INPUT;
unblocking_stdin_mode = default_stdin_mode & ~.ENABLE_LINE_INPUT & ~.ENABLE_ECHO_INPUT;
if SetConsoleMode(stdin, xx default_stdin_mode) == false {
print("Failed to set input mode: %.", GetLastError(), to_standard_error = true);
return;
}
// stdout
stdout = GetStdHandle(STD_OUTPUT_HANDLE);
if stdout == INVALID_HANDLE_VALUE {
print("Invalid output handler.", to_standard_error = true);
return;
}
if GetConsoleMode(stdout, *initial_stdout_mode) == false {
print("Failed to get output mode.", to_standard_error = true);
return;
}
default_stdout_mode = (cast(Console_Mode) initial_stdout_mode) | ENABLE_PROCESSED_OUTPUT| ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if SetConsoleMode(stdout, xx default_stdout_mode) == false {
print("Failed to set output mode: %.", GetLastError(), to_standard_error = true);
return;
}
}
OS_reset_terminal :: () {
if SetConsoleMode(stdin, initial_stdin_mode) == false {
print("Failed to reset input mode: %.", GetLastError(), to_standard_error = true);
return;
}
if SetConsoleMode(stdout, initial_stdout_mode) == false {
print("Failed to reset output mode: %.", GetLastError(), to_standard_error = true);
return;
}
}
OS_get_terminal_size :: () -> rows: int, columns: int {
ScreenBufferInfo: CONSOLE_SCREEN_BUFFER_INFO;
GetConsoleScreenBufferInfo(stdout, *ScreenBufferInfo);
columns := ScreenBufferInfo.srWindow.Right - ScreenBufferInfo.srWindow.Left + 1;
rows := ScreenBufferInfo.srWindow.Bottom - ScreenBufferInfo.srWindow.Top + 1;
return rows, columns;
}
OS_read_input :: (mode: Input_Mode) -> string {
result: string = ---;
if mode == {
case .HUMAN;
assert(SetConsoleMode(stdin, xx blocking_stdin_mode), "Failed to set input mode to blocking mode."); // @speed TODO Could check if was already set before applying.
case .MACHINE;
// assert(SetConsoleMode(stdin, xx unblocking_stdin_mode), "Failed to set input mode to unblocking mode."); // @speed TODO Could check if was already set before applying.
if SetConsoleMode(stdin, xx unblocking_stdin_mode) == false {
print("Failed to set input mode: %.", GetLastError(), to_standard_error = true);
exit(0);
}
}
MAX_BYTES_TO_READ :: 10;
temp : [MAX_BYTES_TO_READ] u8;
bytes_read : s32;
if ReadConsoleA(stdin, temp.data, xx temp.count, *bytes_read) {
// TODO If the number of bytes_read is equal to the buffer size... we may have some more data to read?!
// ---> To fix this, we should check the last read byte and see if it's a newline (at least for HUMAN mode)!
// TODO Maybe pass the input result in the temporary memory (unless specified otherwise)?!
result.data = alloc(bytes_read);
result.count = bytes_read;
memcpy(result.data, temp.data, bytes_read);
}
assert(SetConsoleMode(stdin, xx default_stdin_mode), "Failed to set default input mode."); // @speed TODO Maybe compare current mode with default one before applying?!
return result;
};
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